JP2002346866A - Composite machining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite machining device which stably carries out attaching and detaching operation by a clamp mechanism which attaches and detaches a tool mounting shaft such as a reamer situated in the central part of a tool holder and a tool feeding shaft such as a reamer situated on a main spindle side and allows swift and reliable tool holder change operation. SOLUTION: A holding cylinder 53 is formed at the base end of a reamer mounting shaft 32 supported on the tool holder side. The second clamp ball 55 is accommodated in a fitting hole 54 provided to the holding cylinder 53. A engaging recess 56 with which the second clamp ball 55 can be engaged is provided to the outer peripheral surface of the tip of a stepped cylinder 52 formed on the tip of reamer feeding shaft 33 supported on the main spindle side. A movable sleeve 57 reciprocated in the axial direction of the main spindle is fitted on the outer periphery side of the holding cylinder 53. A linear protrusion 57a formed on the inner peripheral surface of the movable sleeve is biased with a spring 59 forward, namely to the clamp position in which the second clamp ball 55 engaged with the engaging recess 56 is pressed, is thrust on the inner side of the movable sleeve 57 and the second clamping ball 55 is maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tasking machine provided with a plurality of tools at different positions in a radial direction around a main shaft and movably mounted along the axial direction of the main shaft. It is.

[0002]

2. Description of the Related Art Conventional multi-tasking machines of this type include:
For example, a configuration disclosed in Japanese Patent Application Laid-Open No. 7-112309 is known. Fig. 9
The tool holder 12 is detachably mounted on the tip of the main shaft 11, and a tool 24 and a reamer 31 are attached to the tool holder 12 so as to be movable in the axial direction of the main shaft 11. A tool feed shaft 26 for moving the tool 24 and a reamer mounting shaft 32 for moving the reamer 31 are provided on the tool holder 12 side. A reamer feed shaft 33 detachably connected to the reamer mounting shaft 32 is provided on the main shaft 11 side, and is moved in the axial direction of the main shaft 11 by a driving device including a motor. An interlocking mechanism between the tool feed shaft 26 and the reamer feed shaft 33 for interlocking the two feed shafts 26, 33 via the interlocking ball 35 at a predetermined position during the movement of the reamer feed shaft 33 in the axial direction. 34 are provided.

During machining of a workpiece, the drive device moves the reamer feed shaft 33 in the axial direction of the spindle 11 while the spindle 11 is rotated by the motor.
The reamer 4 and the reamer 31 are moved forward to the front end side of the main shaft 11. As a result, the work is subjected to face cutting by the cutting tool 24. When the facing is completed, the interlocking mechanism between the bite feed shaft 26 and the reamer feed shaft 33 is released, and thereafter, only the reamer 31 is moved forward with the movement of the reamer feed shaft 33. As a result, the work is finished by the reamer 31 on the inner peripheral surface of the hole.

[0004] The tool holder 12 is provided with a first
The reamer mounting shaft 32, which is clamped by the clamp mechanism 15 and has the reamer 31, mounted thereon,
It is clamped by the second clamp mechanism 71. First
The clamp mechanism 15 is provided with a first hole held by the ball holding cylinder 16 in an engagement hole 18 formed in the inner peripheral surface of the boss portion of the tool holder 12.
While making the clamp ball 17 detachable,
The first clamp ball 17 is configured to be able to engage and disengage with a fitting concave portion 20 formed on the outer peripheral surface of the clamp shaft 19.

On the other hand, in the second clamp mechanism 71, a tubular portion 72 into which the distal end of the reamer feed shaft 33 is fitted is formed at the base end of the reamer mounting shaft 32. A through-hole 73 is formed in the cylindrical portion 72, and fits into the through-hole 73 so that the cylindrical portion 7
A second clamp ball 74 having a diameter larger than the thickness of the second clamp ball 74;
An annular engaging recess 75 is formed on the outer periphery of the tip of the reamer feed shaft 33 and engages with the second clamp ball 74. Further, an annular fitting concave portion 76 into which the second clamp ball 74 fits is formed at a predetermined position on the inner peripheral surface of the cutting tool feed shaft 26.

When the tool holder 12 is removed by the automatic tool holder changing device and machining is performed with a tool and a reamer mounted on another tool holder, the tool holder 12 is replaced as follows.

The reamer feed shaft 33 is advanced, the position of the second clamp ball 74 of the reamer mounting shaft 32 is aligned with the fitting concave portion 76 of the cutting tool feed shaft 26, and the reamer mounting shaft 32 can be removed from the reamer feed shaft 33. Move to position.
Further, the clamp shaft 19 can be moved in the tip direction with respect to the bite feed shaft 26.

Thereafter, when the clamp shaft 19 is advanced,
The fitting recess 20 at the tip is located inside the first clamp ball 17, and the first clamp ball 17 is
The tool holder 12 is detachable from the clamp shaft 19 by being detached from the second engagement hole 18 and capable of being retracted.

Accordingly, the tool holder 12 is removed while the tool 24 and the reamer 31 are mounted, and the tool holder 12 to which the tool 24 and the reamer 31 of another size are mounted is attached.

[0010]

The above-mentioned conventional second clamp mechanism 71 separates the second clamp ball 74 housed in the through hole 73 of the reamer mounting shaft 32 from the engaging concave portion 75, and simultaneously removes the tool from the cutting tool feed shaft 26. The structure is such that the second clamp ball 74 is engaged with the fitting concave portion 76 to release the clamped state. For this reason, the byte feed shaft 26 that moves back and forth
Therefore, the operation of switching the second clamp ball 74 to the clamp position or the unclamping position becomes unstable. Therefore, there is a problem that it is difficult to quickly and reliably perform the operation of exchanging the tool holder 12. Further, it is difficult to stably hold the second clamp ball 74 in the fitting concave portion 76, and there has been a problem that the attaching / detaching operation of the second clamp mechanism 71 becomes unstable.

A reamer mounting shaft 32 and a reamer feed shaft 33
There is a problem that it is difficult to confirm whether or not the unclamping has been performed reliably. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, and has a clamp mechanism for detaching a tool mounting shaft such as a reamer located at the center of a tool holder and a tool feed shaft such as a reamer located on a main spindle side. An object of the present invention is to provide a combined machining apparatus capable of stably performing the attaching / detaching operation of the tool holder and exchanging the tool holder quickly and reliably.

Another object of the present invention is to provide, in addition to the above objects,
An object of the present invention is to provide a combined machining apparatus capable of surely confirming an unclamping state of a clamp mechanism located on a spindle side and performing a tool holder changing operation more quickly and surely.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to a first aspect of the present invention provides a tool holder coaxially and detachably mounted on a tip of a spindle, and a spindle mounted on the tool holder. A first tool mounted movably in the axial direction of the first tool, a first tool feed shaft provided on the tool holder, for moving the first tool forward and backward in the axial direction of the main spindle, and the first tool in the tool holder A second tool mounting shaft provided so as to penetrate through the feed shaft and movably arranged in the axial direction of the main shaft, and a second tool mounted on the mounting shaft;
A second tool feed shaft that is provided on the main shaft and moves a second tool mounting shaft in the axial direction of the main shaft; and a second tool mounting shaft and a first tool feed shaft that are being moved in the axial direction. An interlocking mechanism for interlocking in a predetermined stroke range, a first clamping mechanism for clamping the main spindle and the tool holder, and a second clamping mechanism for clamping the second tool feed axis and the second tool mounting axis.
In a combined machining device having a clamp mechanism, the second clamp mechanism includes a member holding mechanism that holds a clamping member at a clamp position or an unclamping position, and the member holding mechanism includes the first tool feed shaft and the first tool feed shaft. During the process of independently moving the second tool mounting shaft forward in the tool feed direction,
The gist of the present invention is to provide a movable sleeve which is stopped by contacting the inner piece of the tool holder and is further moved forward to be switched from the clamp position to the unclamping position.

According to a second aspect of the present invention, in the first aspect, the second clamp mechanism includes a holding cylinder provided at a base end of a second tool mounting shaft, and a radially penetrating through the holding cylinder. A clamp ball as a clamping member fitted in the fitted fitting hole, and provided on the outer peripheral surface of the tip of the second tool feed shaft;
And an engaging recess for engaging the clamp ball,
The movable sleeve includes a ridge or a protrusion for clamping the clamp ball on an inner peripheral surface thereof, and the movable sleeve is relatively movable within a predetermined stroke range in the axial direction on the outer peripheral side of the holding cylinder. The holding cylinder and the movable sleeve are switchably fitted between a clamp position for pressing the clamp ball against the engagement recess and an unclamping position for retracting the clamp ball from the engagement recess. The point is that an urging member for urging the movable sleeve to the clamp position is provided between the two.

According to a third aspect of the present invention, in the second aspect, an auxiliary member holding means for holding a clamp ball in an unclamped state in which the second tool feed shaft is detached from the holding cylinder inside the holding cylinder. A mechanism is provided, wherein the auxiliary member holding mechanism is provided in the holding cylinder, and has a locking body provided with an engagement recess for locking the clamp ball, and biases the locking body to a member holding position. The gist of the present invention is that it is constituted by a biasing member that performs the following.

The invention according to claim 4 is the invention according to claim 2 or 3.
In the above, a flange is provided at the base end of the holding cylinder, an annular ridge for pressing the clamp ball is formed on the inner peripheral surface of the movable sleeve, and between the ridge and the flange, The gist is that a coil-shaped spring as an urging member for pressing the movable sleeve is interposed.

According to a fifth aspect of the present invention, in any one of the first to third aspects, the tool holder has a holding mechanism for holding the first tool feed shaft at a limit of the advance in the axial direction. A second clamp mechanism is provided on the tool holder, the first tool feed shaft, and the second tool mounting shaft when the second tool mounting shaft is at the limit of the advance in the axial direction when the tool holder is replaced. A confirmation mechanism for confirming the clamp state is provided. The confirmation mechanism includes a confirmation concave portion provided on the second tool mounting shaft and the second tool feed shaft located at the most forward end at the time of tool change. A checking ball housed in a through hole of the first tool feed shaft so as to be pressed and engaged with the checking recess, and a checking member provided in a tool holder; Move the second tool mounting axis to the maximum advance limit when replacing the tool holder. When the check recess, check ball and confirmation member is summarized in that the second clamping mechanism is held on a straight line is configured to detect that a unclamped state.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, in the multi-tasking machine according to this embodiment, a cylindrical spindle 11 is rotatably supported in a support member such as a spindle head (not shown), and is rotated by a rotation motor (not shown). Has become. A tool holder 12 is coaxially and detachably mounted on a tip end of the main shaft 11. An insertion hole 13 is formed at the center of the tip, and an annular gripping groove 14 is formed on the outer peripheral surface.

A first clamp mechanism 15 is provided between the main shaft 11 and the tool holder 12. That is, the ball holding cylinder 16 is attached to the tip of the main shaft 11,
A plurality of first clamp balls 17 are held on the peripheral wall so as to be movable in the radial direction. A plurality of engagement holes 18 are formed on the inner peripheral surface of the boss portion of the tool holder 12 in correspondence with the first clamp balls 17, and the first clamp balls 17 are engaged with the engagement holes 18, whereby the tool holder 12 is clamped in a mounted state with respect to the main shaft 11.

A clamp shaft 19 is fitted and supported in the main shaft 11 so as to be integrally rotatable and relatively movable in the axial direction of the main shaft 11.
Are formed. When the clamp shaft 19 is moved toward the distal end of the main shaft 11 by a driving device such as a hydraulic cylinder (not shown), the fitting concave portion 20 is disposed inside the first clamp ball 17 so as to be opposed. Thereby, the first
The clamp ball 17 can be retracted from the engagement hole 18 into the fitting recess 20, and the clamp of the tool holder 12 with respect to the main shaft 11 is released, so that an unclamped state is established.

As shown in FIG. 1, a slider 23 is attached to the tip of the tool holder 12 so as to be movable in the axial direction and the radial direction of the main shaft 11. Slider 23
A tool 24 as a first tool is protrudingly provided on the outer surface of the main shaft 11 so as to extend along the axial direction of the main shaft 11. A cam member 25 protrudes from the inner surface of the slider 23 so as to extend in a direction inclined at a predetermined angle with respect to the axial direction of the main shaft 11.

In the tool holder 12, a cylindrical cutting tool feed shaft 26 having a flange portion 26a as a first tool feed shaft is held inside a holding cylinder 27 as an internal piece fitted and fixed in the tool holder 12. , So as to be relatively non-rotatable and relatively movable in the axial direction. Tool feed shaft 26
The flange 26a provided at one end of the
A cam groove 28 is formed on the tapered surface 26b of the flange 26a so as to be inclined in the circumferential direction of the flange 26a as shown in FIG. This cam groove 28 is used for the bite feed shaft 2
The cam member 25 is slidably inserted therein so as to extend in a direction inclined by a predetermined angle with respect to the axial direction of the cam 6. When the cutting tool feed shaft 26 is moved in the axial direction of the main shaft 11, the slider 23 is moved in the inclined direction via the cam groove 28 and the cam member 25, and the cutting tool 24 is moved to the retracted position shown in FIG. The positions are switched between the forward positions shown in FIGS.

As shown in FIG. 1, a reamer 31 serving as a second tool is rotatable integrally with a reamer mounting shaft 32 serving as a second tool mounting shaft in a central portion of the tool holder 12 in the axial direction. It is arranged to be relatively movable. The reamer mounting shaft 32 and the reamer 31 are connected to each other so as not to move relatively in the axial direction and to rotate relative to each other, and the tip of the reamer 31 is made to protrude and retract through the insertion hole 13 of the tool holder 12. . A reamer feed shaft 33 as a second tool feed shaft is detachably connected to a base end of the reamer mounting shaft 32 in the main shaft 11 via a second clamp mechanism 51 described later. Then, it is moved in the axial direction of the main shaft 11 via a ball screw or the like by a driving device such as a moving motor (not shown).

Further, at the time of machining the work, the reamer feed shaft 33 is moved in the axial direction within a predetermined range, and the reamer 31 is moved.
1 is retracted into the insertion hole 13 through the reamer mounting shaft 32 as shown by a solid line in FIG. 1 during normal machining, and is advanced by projection from the insertion hole 13 as shown by a dashed line in FIG. It can be switched between.

As shown in FIGS. 1 and 2, an interlocking mechanism 34 is provided between the reamer mounting shaft 32 and the bite feed shaft 26. By the interlocking mechanism 34, the two shafts 3 are moved at a predetermined position during the movement of the reamer feed shaft 33 in the axial direction.
2, 26 are interlocked. That is, the through hole 2 formed in the peripheral wall of the cutting tool feed shaft 26 in the radial direction.
6c, a plurality of interlocking balls 35 are held movably in the radial direction. An annular engagement recess 36 is formed on the outer periphery near the tip of the reamer mounting shaft 32 so as to be able to engage with each interlocking ball 35.

When processing a normal workpiece, FIG.
As shown in FIG. 7, the interlocking ball 35 is engaged with the engagement concave portion 36, and the reamer mounting shaft 32 and the bite feed shaft 26 are connected. In this state, with the forward movement of the reamer feed shaft 33,
The tool feed shaft 26 is moved in conjunction with the same direction. In addition, during the forward movement of the two shafts 32 and 26 during the work processing, after the movement of the cutting tool feed shaft 26 is restricted by the engagement with the stopper 29, as shown in FIGS.
The interlocking ball 35 is disengaged from the engaging recess 36, and the connection between the reamer mounting shaft 32 and the bite feed shaft 26 is released. In this state, only the bite feed shaft 26 moves forward.

As shown in FIGS. 1 and 2, the tool holder 12 is provided with a holding mechanism 37. When the tool holder 12 is detached and replaced, the cutting tool feed shaft 26 is held at the forward end of the moving range by the holding mechanism 37. That is, a pressing pin 38 is housed in the holding cylinder 27 in a state where the pressing pin 38 is urged toward the outer peripheral surface of the cutting tool feed shaft 26 by a spring 39.
The holding recess 40 is provided on the inner peripheral surface of the
Are formed. Then, as shown in FIG. 4, when the cutting tool feed shaft 26 is moved to the forward limit, the engagement recess 36
, The interlocking ball 35 is detached from the shaft, and the interlocking ball 35 is pressed against the outer peripheral surface of the reamer mounting shaft 32 to engage with the holding recess 40, thereby holding the cutting tool feed shaft 26 at the limit of forward movement. In this embodiment, the interlocking mechanism 34 and the holding mechanism 37 use a common interlocking ball 35.

A confirmation mechanism 41 for confirming that the tool holder 12 can be replaced when the tool holder 12 is attached to and detached from the spindle 11 is replaced between the tool holder 12, the tool feed shaft 26 and the reamer mounting shaft 32. Is provided.
The checking mechanism 41 is configured to move the cutting tool feed shaft 26 to the forward limit, and to move the reamer mounting shaft 32 further forward than the forward limit during normal machining (the unclamping state of the second clamp mechanism 51 described later). ) Is detected. The confirmation mechanism 41 will be described below.

The tool feed shaft 26 is provided with one through hole 43 for accommodating the first confirmation ball 42 movably in the radial direction. The first confirmation ball 42 is provided on the outer peripheral surface near the base end of the reamer mounting shaft 32. A confirmation recess 32a with which the ball 42 can be engaged is formed. Then, as shown in FIG. 6, with the reamer mounting shaft 32 moved to the maximum forward limit,
The first confirmation ball 42 is engaged with the second confirmation concave portion 32a, and the reamer mounting shaft 32 is held at the maximum advance.

At a predetermined position of the holding cylinder 27 so as to be pressed against the outer peripheral surface of the cutting tool feed shaft 26, a second confirmation ball 44 is movable in the radial direction and can correspond to the first confirmation ball 42. Is housed in A confirmation member 45 at the tool change position is accommodated in the tool holder 12 so as to be movable in the radial direction, and the second confirmation ball 44 is urged against the outer peripheral surface of the cutting tool feed shaft 26 by a spring 46. The main shaft 1 is fixed by the second confirmation ball 44 and the confirmation member 45.
It is possible to confirm that the tool feed shaft 26 and the reamer mounting shaft 32 are held at the most forward end of the movement range when the tool holder 12 is detached and replaced with respect to the tool holder 12. That is, as shown in FIG. 7, when the cutting tool feed shaft 26 and the reamer mounting shaft 32 are moved to the maximum forward position, the first confirmation ball 42
Correspond to the second check ball 44, and the check recess 32a of the reamer mounting shaft 32 is moved to the position of the first check ball 42, so that the first check ball 42 is engaged with the check recess 32a. Therefore, the second confirmation ball 44 is pressed against the first confirmation ball 42 by the confirmation member 45 urged by the spring 46, and the confirmation member 45 is moved inward in the radial direction.
Therefore, when the holding groove 14 of the tool holder 12 is gripped by the tool holder changing arm 49 of the tool holder changing device in this state, the sensor 48 on the tool holder changing arm 49 detects the contact depth with the confirmation member 45 and detects the contact depth. , The sensor 48 detects an appropriate position. For this reason, it is confirmed and detected that the reamer mounting shaft 32 and the bite feed shaft 26 are at the most forward limit.

Also, as shown in FIGS. 1, 4 and 5, when the reamer mounting shaft 32 is not at the maximum forward position, the first confirmation ball 4
2 comes into contact with the outer peripheral surface of the reamer mounting shaft 32 without engaging with the confirmation concave portion 32 a, and the confirmation member 45 is projected from the holding groove 14. Therefore, in this state, FIG.
As shown in the figure, when the holding groove 14 of the tool holder 12 is gripped by the tool holder changing arm 49 of the tool holder changing device, the tool holder holding portion 5 of the tool holder changing arm 49 is moved.
0 detects that the depth of the confirmation member 45 is shallow. Therefore, it is confirmed and detected that the reamer mounting shaft 32 is not at the maximum forward limit.

Next, the second clamp mechanism 51 will be described with reference to FIG. A small-diameter stepped cylindrical portion 52 is formed at the tip of the reamer feed shaft 33. At the base end of the reamer mounting shaft 32, a holding cylinder 53 detachable from the stepped cylinder part 52 is integrally formed. A fitting hole 54 is formed through the holding cylinder 53 in the radial direction, and a second clamp ball 55 as a clamping member is accommodated in the fitting hole 54 so as to be movable in the radial direction. The second clamp ball 5 is provided on the outer peripheral surface of the stepped cylindrical portion 52 of the reamer feed shaft 33.
5 are formed. The fitting hole 54, the second clamp ball 55 and the engagement recess 56 are
It is provided at a plurality of locations at equal pitches in the circumferential direction of the holding cylinder 53.

A movable sleeve 57 is fitted on the outer peripheral surface of the holding cylinder 53 so as to be relatively movable within a predetermined stroke range in the axial direction of the holding cylinder. This movable sleeve 57
Can be switched between a clamp position where the second clamp ball 55 is pressed against the engagement recess 56 and an unclamping position where the second clamp ball 55 is retracted from the engagement recess 56. A flange 58 is provided at the base end of the holding cylinder 53, and an annular ridge 57 for pressing the second clamp ball 55 is provided on the inner peripheral surface of the movable sleeve 57.
a is formed. The ridge 57a and the flange 58
A coil-shaped spring 59 as an urging member is interposed between the first and second members to urge the movable sleeve 57 to the clamp position. A screw cylinder 60 is screwed onto the outer peripheral surface of the movable sleeve 57, and the forward movement position of the movable sleeve 57 is regulated by the base end of the ridge 57 a contacting the screw cylinder 60. A slope 57b is formed in front of the ridge 57a of the movable sleeve 57. When the movable sleeve 57 is retracted, the second clamp ball 55 is moved to an unclamping position corresponding to the slope 57b. I have.

In this embodiment, the movable sleeve 57
The spring 59 forms a ball holding mechanism M as a member holding mechanism. When the reamer feed shaft 33 is moved to the forward limit during normal machining, the movable sleeve 57 is moved to the position shown in FIG.
As shown in (a), it is stopped by contacting a part of the tool holder, that is, the base end surface of the holding cylinder 27. When the reamer mounting shaft 32 is moved to the maximum advance by the reamer feed shaft 33, the holding cylinder 53 is further advanced against the urging force of the spring 59, and the ridge 57 a clamps the second clamp ball 55. From the clamp position, as shown in FIG.
The clamp ball 55 is detached from the engagement concave portion 56 and can be switched to the unclamped position.

In the holding cylinder 53, the stepped cylinder portion 52 is detached from the holding cylinder 53, and the stepped cylinder portion 52 is in an unclamped state.
An auxiliary ball holding mechanism 61 as an auxiliary member holding mechanism for holding the clamp ball 55 is provided. The auxiliary ball holding mechanism 61 is housed in the holding cylinder 53,
And an engagement recess 6 for locking the second clamp ball 55
The locking ring 62 is provided with a locking ring 62 having a locking member 2a and a coil spring 63 as a biasing member for biasing the locking ring 62 to a ball holding position as a member holding position.

A seal cylinder 64 is provided at the tip of the stepped cylinder section 52. The seal cylinder 64 is penetrated by the locking ring 62, inserted into a shaft hole of the reamer mounting shaft 32, and has an inner peripheral surface thereof. The seal is provided by a seal ring 65 provided at the bottom.

Next, the operation of the multi-tasking machine configured as described above will be described. By the way, in the state shown in FIG. 1, the cutting tool 24 and the reamer 31 are arranged at the retreat limit during normal machining. In this state, the interlocking ball 35 of the interlocking mechanism 34 is engaged with the engagement recess 36 of the reamer mounting shaft 32, the first confirmation ball 42 is engaged in the through hole 43, and the second confirmation ball 44 is It is in contact with the outer peripheral surface of the feed shaft 26.

In this state, when machining of the work is started, the main shaft 11 is rotated at a predetermined speed by a rotating motor (not shown), and the cutting tool 24 and the reamer 31 are integrally rotated. At this time, a reamer feed shaft 33 is driven by a driving device such as a moving motor (not shown) through a ball screw or the like.
Is moved forward to the tip end side of the main shaft 11, and the forward movement of the reamer 31 is started. Then, the tool feed shaft 26 is advanced by a predetermined distance in the axial direction of the main shaft 11 while the interlocking ball 35 is engaged with the engagement concave portion 36. Thereby, the slider 23 is moved in the inclined direction via the cam groove 28 and the cam member 25, and the cutting tool 24 is moved from the retreat limit shown in FIG.
Is moved toward the forward limit shown in FIG. 1 and the work is subjected to processing such as surface cutting by the cutting tool 24.

Then, as shown in FIG. 4, when the cutting tool feed shaft 26 is moved to the forward limit of the moving range and the cutting tool 24 reaches the forward limit, machining of the workpiece by the cutting tool 24 is completed. At this time, the forward movement of the bite feed shaft 26 is stopped by abutting on the stopper 29, and the bite 24 is held at the forward limit. In this state, the rotation speed of the main shaft 11 is increased by switching the speed of the rotation motor.

Thereafter, when the reamer feed shaft 33 is further moved forward, as shown in FIG. 5, the interlocking ball 35 is disengaged from the engagement concave portion 36, and only the reamer 31 is moved forward, so that the tool holder 12 is inserted. The work is protruded forward from the immersion state in the hole 13, and the workpiece is subjected to processing such as finishing of the inner peripheral surface of the hole by the reamer 31. And reamer 31
Of the workpiece by the reamer 31 is terminated when the machine reaches the forward limit during normal machining.

Next, when the reamer feed shaft 33 is moved backward to the base end side of the main shaft 11 by the reverse rotation of the driving device such as the moving motor, the reamer 31 and the cutting tool 24 are moved in the reverse order of the forward movement described above. Is moved from the forward limit shown in FIG. 5 to the retreat limit at the time of normal machining shown in FIG. That is, the reamer 31 moves backward as shown in FIG.
Is moved from the forward limit shown in FIG. 1 to the retreat limit during normal machining shown in FIG. The cutting tool 24 has a reamer feed shaft 33 as shown in FIG.
Is moved backward to the position shown in FIG. 7, and the engagement between the interlocking mechanism 34 and the interlocking ball 35 causes the bite feed shaft 26 to retreat and return to the retreat limit during normal machining shown in FIG.
Then, by repeatedly performing the advancing and retreating operations of the cutting tool 24 and the reamer 31, processing on a plurality of workpieces is performed continuously.

When the work of machining the work is completed, the spindle 1
When performing the work of exchanging the tool holder 12 for 1
As shown in FIG. 5, in a state where the cutting tool 24 and the reamer 31 are arranged at the forward limit during the normal machining, the tool holder 12 is gripped by the claws of the tool holder exchange arm 49. Then, the sensor 48 detects that the confirmation member 45 is protruding from the holding groove 14. Thereafter, the reamer feed shaft 33 is further moved forward by the driving device such as a moving motor toward the distal end of the main shaft 11, and the forward movement of the reamer 31 is started.

When the reamer feed shaft 33 is further moved forward, as shown in FIG. 6, only the reamer 31 is moved forward and moved to a position further protruding from the insertion hole 13 of the tool holder 12. At this time, the distal end surface of the movable sleeve 57 abuts on the base end surface of the holding cylinder 27 and is prevented from advancing. In this state, the reamer feed shaft 33 and the holding cylinder 53 are advanced. Therefore, the movable sleeve 57 is relatively retracted on the holding cylinder 53 against the urging force of the spring 59, and the second clamp ball 5
5 is released. As a result, the second clamp ball 55 moves away from the fitting hole 54 toward the inner peripheral surface of the movable sleeve 57, and the second clamp ball 55
And the holding cylinder 53 can be pulled out from the stepped cylinder part 52. In this state,
The first confirmation ball 42 of the unclamping confirmation mechanism 41 of the reamer attachment shaft 32 is engaged with the confirmation recess 32 a of the reamer attachment shaft 32. Then, the confirmation concave portion 32a, the first confirmation ball 42, and the confirmation member 45 are held in a straight line, and the confirmation member 45 is held at the immersion position in the holding groove 14.

Subsequently, the clamp shaft 19 is moved to the distal end side of the main shaft 11 by a driving device such as a hydraulic cylinder (not shown), and the fitting recess 20 of the first clamp mechanism 15 is moved to the first position.
It is arranged inside the clamp ball 17 so as to be opposed. As a result, the first clamp ball 17 can be retracted from the engagement hole 18 into the fitting concave portion 20, and as shown in FIG.
Of the tool holder 12 is released. As described above, at this time, the unclamping confirmation member 45 has already been moved to the retracted position in the holding groove 14, and it is detected that the bite feed shaft 26 and the reamer mounting shaft 32 are at the maximum advance.

Then, the tool holder 12 is pulled out from the tip of the spindle 11 by the claw of the tool holder exchange arm 49, and the tool holder 12 having the different types of cutting tools 24 and the reamer 31 is mounted on the spindle 11. Therefore, the tool 24 and the reamer 31 are exchanged with the tool holder 12.

When the holding cylinder 53 is pulled out from the stepped cylindrical portion 52, the movable sleeve 57 is moved to the clamping position by the accumulated force of the spring 59 as shown in FIG. It is engaged in the mating hole 54. At the same time, the locking ring 62 is moved toward the fitting hole 54 by the accumulated force of the coil spring 63, and the second clamp ball 5
5 is engaged with the engaging recess 62a of the locking ring 62, and the second clamp ball 55 is held at a predetermined position. Further, the reamer mounting shaft 32 is normally held at the limit of the forward movement during machining.

When a new tool holder 12 is mounted on the main shaft 11, the operation can be performed by performing the operation opposite to the above-described removal operation. At this time, in the state shown in FIG.
The tool holder 12 is moved toward the main shaft 11, the stepped tube portion 52 is inserted into the holding tube 53, and the locking ring 62 is pushed by the distal end surface of the stepped tube portion 52. Then, the locking ring 62 is separated from the second clamp ball 55, and the second clamp ball 55 is engaged with the engagement concave portion 56 of the stepped cylindrical portion 52.

Therefore, according to this embodiment, the following effects can be obtained. (1) The second clamp mechanism 51 is independently mounted between the reamer mounting shaft 32 and the reamer feed shaft 33 irrespective of the bite feed shaft 26. For this reason, the position switching operation between the clamp position and the unclamping position of the second clamp ball 55 can be stably performed, and the exchange operation of the tool holder 12 can be performed quickly and reliably.

(2) Holding cylinder 5 provided on reamer mounting shaft 32
The protrusion 5 of the movable sleeve 57 urged by the spring 59 against the second clamp ball 55 engaged with the third fitting hole 54.
7a pressed against the clamp position. For this reason, the second clamp ball 55 can be stably held at the clamp position.

(3) An auxiliary ball holding mechanism 61 is provided inside the holding cylinder 53 to hold the clamped second clamp ball 55 at the clamp position when the tool holder 12 is removed. Therefore, in a state where the tool holder 12 is removed, the second clamp ball 55 can be stably held at the clamp position.

(4) Tool holder 12 and cutting tool feed shaft 26
And the holding mechanism 37 is provided between the
Can be stably held at the forward limit. (5) Unclamp confirmation mechanism 4 for reamer mounting shaft 32 on tool holder 12, tool feed shaft 26 and reamer mounting shaft 32
1 was provided. For this reason, it is possible to detect that the second clamp mechanism 51 is switched to the unclamping position when the reamer mounting shaft 32 is at the most forward limit at the time of tool change, and it is possible to quickly perform a tool holder changing operation. .

(Modification) This embodiment can be embodied with the following modifications. In the above-described embodiment, instead of the second confirmation ball 44 of the unclamping confirmation mechanism 41 of the reamer mounting shaft 32, an engagement convex portion that can abut on the first confirmation ball 42 protrudes from the inner end of the confirmation member 45. It may be formed.

In the above embodiment, the tool holder 12
A plurality of first tools such as a cutting tool 24 may be provided thereon. -Instead of the second clamp ball 55, a columnar or other clamping member may be used.

A projection may be provided instead of the ridge 57a of the movable sleeve 57. -In the said embodiment, you may provide a tool different from the cutting tool 24 and the reamer 31 as a 1st tool and a 2nd tool.

Even with such a configuration, it is possible to obtain substantially the same effects as those of the above-described embodiment. (Technical Thought 1) The interlocking mechanism (3) according to claim 1,
4) a through hole (26c) provided on the first tool feed shaft (26), an interlocking ball (35) housed in the through hole (26c), and a second tool mounting shaft (32). An engagement recess (36) formed on the outer peripheral surface and capable of engaging the interlocking ball (35); and a holding recess (36) provided on the tool holder (12) and capable of engaging the interlocking ball (35). 40), when the first tool feed shaft (26) is located at the forward limit of the movement range, the interlocking ball (35) engaged with the through hole (26c) is disengaged from the engagement recess (36). And is configured to engage with the holding recess (40).
c) The combined machining apparatus in which the interlocking ball (35) and the holding recess (40) also have the function of the holding mechanism (37).

According to the first technical idea, the structures of the interlocking mechanism and the holding mechanism can be simplified. (Technical idea 2) In claim 3, a seal cylinder (64) is provided at a tip end of the second tool feed shaft, and the seal cylinder is penetrated by a locking ring (62) as the locking body. A multi-tasking machine configured to be inserted into a shaft hole of a second tool mounting shaft and to perform sealing with a seal ring (65) provided on an inner peripheral surface of the shaft hole.

[0057]

According to the present invention, the attachment / detachment operation of the clamp mechanism for attaching / detaching the tool mounting shaft such as a reamer located at the center of the tool holder and the tool feed shaft located at the main spindle side can be stabilized. And the tool holder changing operation can be performed quickly and reliably.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a cutting tool and a reamer are located at a retreat limit at the time of normal machining in a main spindle portion of a combined machining apparatus according to an embodiment.

FIG. 2 is a cross-sectional view of the combined machining apparatus of FIG.

3A is a cross-sectional view illustrating a second clamp mechanism in an enlarged state in a clamp state, and FIG. 3B is a cross-sectional view illustrating an unclamped state.

FIG. 4 is a cross-sectional view showing a state in which a cutting tool is located at a forward limit during normal machining in a main spindle portion of the combined machining apparatus.

FIG. 5 is a cross-sectional view showing a state in which a cutting tool and a reamer are positioned at a forward limit during normal machining in a main spindle portion of the multi-tasking machine.

FIG. 6 is a cross-sectional view showing a state in which a first clamp mechanism is in a clamped state and a second clamp mechanism is switched to an unclamped state in a main spindle portion of the multifunctional processing apparatus.

FIG. 7 is a cross-sectional view showing a state in which a first clamp mechanism and a second clamp mechanism are switched to an unclamped state in a main spindle portion of the multifunctional processing apparatus.

FIG. 8 is a sectional view showing a state where the tool holder is detached from the spindle.

FIG. 9 is a cross-sectional view showing a conventional combined machining apparatus.

[Explanation of symbols]

M: ball holding mechanism as a member holding mechanism, 11: spindle, 12: tool holder, 15: first clamping mechanism, 24
.., A tool as a first tool, 26, a tool feed axis as a first tool feed axis, 31, a reamer as a second tool, 3
2 ... Reamer mounting shaft as second tool mounting shaft, 33 ... Second
Reamer feed axis as a tool feed axis, 34 ... interlocking mechanism, 3
7: holding mechanism, 41: confirmation mechanism, 51: second clamping mechanism, 53: holding cylinder, 54: fitting hole, 55: clamping member, 56, 62a: engaging recess, 57: member holding mechanism Movable sleeve, 57a ... ridge, 58 ... flange,
59 a spring as an urging member constituting the member holding mechanism;
61 ... an auxiliary ball holding mechanism as an auxiliary member holding mechanism,
62: locking ring as locking body, 63: spring as biasing member, 64: seal cylinder, 65: seal ring.

Continued on the front page F term (reference) 3C016 FA17 3C032 AA07 3C036 LL01 3C050 DC01 DC02

Claims (5)

[Claims] 1. A tool holder mounted coaxially and detachably on a tip end of a spindle, a first tool mounted on the tool holder so as to be movable in an axial direction of the spindle, and provided on the tool holder; A first tool feed shaft for moving the first tool forward and backward in the axial direction of the main shaft; and a first tool feed shaft provided in the tool holder so as to penetrate the first tool feed shaft and movably disposed in the axial direction of the main shaft. Second tool mounting shaft and the second tool mounted on the mounting shaft
A tool, a second tool feed shaft provided on the main shaft and moving a second tool mounting shaft in the axial direction of the main shaft, and a second tool mounting shaft and a first tool feed shaft in the axial direction. An interlocking mechanism (34) for interlocking within a predetermined stroke range during movement, a first clamping mechanism (15) for clamping the main spindle and the tool holder, and clamping the second tool feed axis and the second tool mounting axis. In a combined machining device provided with a second clamp mechanism (51), the second clamp mechanism (51) includes a clamping member (5).
5) a member holding mechanism (M) for holding the second tool mounting shaft (M) at a clamp position or an unclamping position, the member holding mechanism (M) being independent of the first tool feed shaft (26). A movable sleeve (57) which is stopped in contact with the inner piece of the tool holder during the process of moving the tool forward in the tool feed direction, and further moving forward to switch from the clamped position to the unclamped position. apparatus. 2. The holding cylinder (53) according to claim 1, wherein the second clamp mechanism (51) is provided at a base end of a second tool mounting shaft.
And a fitting hole (5) penetratingly formed in the holding cylinder (53) in the radial direction.
A clamping ball (55) as a clamping member fitted in 4), and an engaging concave portion (56) provided on the outer peripheral surface of the distal end of the second tool feed shaft and engaging the clamping ball (55). The movable sleeve (57) has a ridge (57a) for clamping the clamp ball (55) on an inner peripheral surface thereof.
The movable sleeve (57) is fitted on the outer peripheral side of the holding cylinder (53) so as to be relatively movable in the axial direction within a predetermined stroke range, and the clamp ball (55) is provided.
The holding cylinder (53) is fitted so as to be switchable between a clamp position for pressing the engaging cylinder (56) against the engaging concave portion (56) and an unclamping position for retracting the clamp ball (55) from the engaging concave portion (56). ) And a movable sleeve (57), a biasing member (59) for biasing the movable sleeve (57) to a clamp position is provided. 3. An auxiliary member holding mechanism for holding a clamp ball (55) inside the holding cylinder (53) in an unclamped state in which a second tool feed shaft is detached from the holding cylinder. (61) is provided, and the auxiliary member holding mechanism (61) is housed in the holding cylinder (53) and engages with the engaging recess (62) for locking the clamp ball (55).
A combined machining apparatus comprising a locking body (62) provided with a) and a biasing member (63) for biasing the locking body (62) to a member holding position. 4. The holding cylinder (53) according to claim 2, wherein a flange (58) is provided at a base end of the holding cylinder (53), and a clamp ball (5) is provided on an inner peripheral surface of the movable sleeve (57).
An annular ridge (57a) for pressing the movable sleeve (57) is formed between the ridge and the flange (58) as a biasing member for pressing the movable sleeve (57). (59) A combined machining apparatus in which (59) is interposed. 5. The method according to claim 1, wherein
The tool holder is provided with a holding mechanism (37) for holding the first tool feed shaft at the forward limit in the axial direction,
The second clamp mechanism (51) is unlocked between the tool holder, the first tool feed shaft, and the second tool mounting shaft because the second tool mounting shaft is at the forward limit in the axial direction when the tool holder is replaced. Confirmation mechanism (4
1) is provided, and this confirmation mechanism (41) is provided with a confirmation concave portion (32a) provided on the second tool mounting shaft, and when the second tool feed shaft is located at the most forward limit at the time of tool change, A check ball (42) housed in a through hole of the first tool feed shaft so as to be pressed into engagement with the check recess, and a check member (45) provided in a tool holder; When the tool feed shaft and the second tool mounting shaft have been moved to the maximum advance when replacing the tool holder, the confirmation recess (32a), the confirmation ball (42) and the confirmation member (45) are held in a straight line. A combined machining apparatus configured to detect that the second clamp mechanism (51) is in an unclamped state.