JPH11245107A - Turret tool rest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain an electrically driven engagement and disengagement mechanism for fixing a turret firmly at an indexing position on a supporting base and releasing the fixing without need for an additional motor. SOLUTION: This turret tool rest device is provided with a movable engagement member 40 capable of being engaged with both of supporting base 20 and a turret 24. The movable engagement member 40 is provided with an annular cam part 46 connected to the back, end of a main body part 42 through a plurality of legs 44 and an annular coupling part 48 attached to the front end of the main body 42 with bolts 47. The annular cam part 46 is provided with a driven ring element 74 slidably-accommodated in an annular groove path 70 at a groove cam ring element 72. When the supporting base 20 makes X-axis movement on a tool slide, the driven ring element 74 rotates within the annular groove path 70 at the groove cam element 72 to move the groove cam ring element 72 in the axial direction. It is thus possible to engage and disengage teeth 54 formed at the annular coupling part 48 with the fixed teeth 58 of the supporting base 20 and the rotating teeth 62 of the turret 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tool rest device installed on a machine tool such as a lathe, and more particularly, to a tool fixedly held at an indexing position by a turning indexing operation of the tool post. To this end, the present invention relates to a turret tool rest device provided with a locking means for preventing rotation of the tool rest after rotation indexing.

[0002]

2. Description of the Related Art In a machine tool such as a lathe, a large number of tools are carried in advance and a desired tool is selected by a turning indexing operation in order to promote automation and speeding up of a machining operation. 2. Description of the Related Art A rotary tool rest structure for positioning at a working position, that is, a tool equipped with a turret tool rest apparatus is well known. For example, a turret tool rest device used in an automatic turning machine such as an NC lathe generally includes a tool feeder installed on a machine base opposite to a rotating spindle, and a tool feeder along a given coordinate axis. And a turret rotatably supported by the support and supporting a number of tools at predetermined intervals around a rotation axis.

In this type of turret tool rest device, it is necessary to firmly fix the turret on the support table after the turret is rotated and indexed and then the workpiece is machined by the selected tool. To that end, turret tool rest devices generally comprise locking means for locking the turret at each of a plurality of indexing positions on the support. Conventionally, this locking means has a pair of engaging members provided on each of the turret and the support base, which can be engaged with each other, and a mechanism for relatively moving the engaging members between an engaging position and a disengaging position. And a de-drive mechanism. As the engaging member, a mutually-removable coupling having a meshing clutch-like structure is generally used. In this case, the engagement / disengagement drive mechanism is configured to move the engaging member on the turret side relative to the engaging member on the support base in the axial direction.

[0004] As a tool selection procedure, first, at the stage when the work processing by one tool is completed, the support base is moved on the tool feed base together with the turret, and the tool is sent from the processing work position to the tool change position. Next, the turret-side engaging member is moved by the driving of the engagement / disengagement driving mechanism to disengage from the support base-side engaging member, and in that state, the turret is rotated by another rotary drive source to perform turning indexing, Select the desired tool.
Next, the turret-side engagement member is engaged with the support base-side engagement member by driving the engagement / disengagement drive mechanism, and the selected tool is fixedly held at the indexing position. In this state, the support table is moved together with the turret on the tool feed table, and the selected tool is sent from the tool change position to the machining operation position.

[0005]

An automatic turning machine such as an NC lathe includes a rotary drive source for a spindle, a drive source for each axis for tool feed,
A plurality of drive sources having different control targets, such as a chuck open / close drive source, are provided. Servo motors are generally used for these drive sources, particularly in parts (spindle, tool feed, etc.) where high-speed and high-precision response is required. Furthermore, in recent years, the opening / closing drive source of the chuck and the portion where a hydraulic or pneumatic actuator is conventionally used, such as the turret rotation drive source of the turret tool post device, are advantageous in terms of environmental hygiene and operation reliability. Servo motors tend to be used.

However, in the above-described engagement and disengagement drive mechanism of the turret tool rest device, the required operation is a simple operation of only slightly moving one of the engagement members in the axial direction. Electrification has been delayed, and many still employ hydraulic or pneumatic actuators. The hydraulic / pneumatic actuator generally has problems such as deterioration of the working environment due to noise and air pollution, increase in equipment cost, enlargement of the machine, and low response accuracy. In particular, when a hydraulic cylinder is used as the engagement / disengagement drive source, the operating speed easily changes due to a change in the temperature of the hydraulic oil. Not only is it difficult to stably control the operation, but also the hydraulic cylinder itself is a considerable heat source, which may affect the operation of the surrounding mechanical components. Therefore, it is desired that the engagement / disengagement drive mechanism of the turret tool rest device is also electrically operated.

On the other hand, the turret tool rest apparatus in which the drive source is motorized has a configuration in which a servomotor as a turret rotation drive source is installed on a support base and can carry not only fixed tools such as cutting tools but also rotary tools such as drills. In this case, the servomotor for the rotary tool is also installed on the support base. And, in order to respond to the demand for the electrification of the engagement / disengagement drive mechanism, when a servomotor as an engagement / disengagement drive source is further installed on a support base, a moving element along a given coordinate axis on a turning machine is required. Unnecessarily increase the weight of one support base,
Not only does the response accuracy deteriorate, but also the problems such as an increase in the size of the entire machine and an increase in manufacturing and operating costs occur.

Accordingly, an object of the present invention is to make an engagement / disengagement drive mechanism for holding and releasing a turret fixedly at an indexing position on a support base electric without adding a new electric motor, As a result, a turret tool rest device that can reduce noise and air pollution, improve response accuracy, reduce manufacturing and operation costs, and promote the further miniaturization and higher performance of mounted machine tools. To provide.

[0009]

In order to achieve the above object, according to the present invention, there is provided a support table movably mounted on a machine tool along a given coordinate axis, A turret which is rotatably supported and carries a number of tools at predetermined intervals around a rotation axis, and a locking means for fixedly holding the turret with respect to the support at a rotation indexing position on the support. In the turret tool rest apparatus, the locking means is installed in association with both the turret and the support,
An engagement mechanism having at least a fixed-side engagement element and a movable-side engagement element that can engage with each other, and rotating the turret by engaging the movable-side engagement element of the engagement mechanism with the fixed-side engagement element. A drive mechanism for moving between an engagement position for blocking and a disengagement position for releasing the rotation of the turret by disengaging from the fixed-side engagement element, wherein the drive mechanism moves the tool to a machining operation position, a tool change position, A turret tool rest device comprising an interlocking device that moves the movable-side engaging element in conjunction with the movement of the support base for carrying the turret tool post.

According to a second aspect of the present invention, in the turret tool rest apparatus according to the first aspect, the interlocking device of the driving mechanism is provided on a first cam provided on the machine tool and on the support table, and one end thereof is provided. And a driven arm slidably contacting the first cam and engaging the other end with a movable-side engagement element of the engagement mechanism. The driven arm is movable by swinging of the driven arm generated when the support base moves. Provided is a turret tool rest device configured to move a side engagement element between an engagement position and a disengagement position.

According to a third aspect of the present invention, in the turret tool rest apparatus according to the second aspect, a second cam is formed between the other end of the driven arm and the movable-side engaging element of the engaging mechanism. Turret tool rest apparatus provided.

The present invention described in claim 4 is the first to third aspects of the present invention.
In the turret tool rest apparatus according to any one of the above,
The fixed-side engaging element of the engaging mechanism includes a plurality of fixed teeth fixedly formed on the support, and the movable-side engaging element includes a plurality of rotating teeth fixedly formed on the turret, Moving teeth that can be engaged with both the fixed teeth of the turret and the rotating teeth of the turret, and the drive mechanism moves the moving teeth from an engagement position that engages both the fixed teeth and the rotating teeth and at least the rotating teeth. Provided is a turret tool rest device configured to be moved between a detached position and a detached position.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments with reference to the accompanying drawings. In the drawings, the same or similar components are denoted by common reference numerals. Referring to FIG. 1, a turret tool rest apparatus 10 according to one embodiment of the present invention is shown mounted on an automatic turning machine such as an NC lathe. Turret tool post device 10
Is arranged to face the rotary spindle 12 of the automatic turning machine. The rotary spindle 12 is mounted and housed in a housing-shaped headstock 14, grips a bar W to be turned, and is rotationally driven by a drive source (not shown). The turret tool rest device 10 carries a large number of tools required for machining the bar W in a predetermined position in advance, selects a desired tool according to a machining location of the bar W by a turning indexing operation, and performs automatic turning. It is positioned at the machining operation position at the tip of the rotary spindle 12 of the machine.

The turret tool rest apparatus 10 includes a rotary spindle 12
A tool feed base 18 installed on the machine base 16 of the automatic turning machine in opposition to the above, a support base 20 movably installed on the tool feed base 18 along a given coordinate axis, and a support base 20. A turret 24 rotatably supported and carrying a number of tools 22 at predetermined intervals around a rotation axis. In the illustrated embodiment, the tool feed base 18 is moved in the Z-axis direction substantially parallel to the center axis of the rotary spindle 12 by driving a Z-axis feed motor (not shown), and the support base 20 is moved to the center axis of the rotary spindle 12. The turret 24 is configured to move in a substantially orthogonal X-axis direction by driving an X-axis feed motor (not shown).
The various tools 22 selected above turn the bar W into a desired shape under the double-axis feed operation.

FIGS. 2 and 3 show the structure of the turret 24 supported on the support base 20 in detail. The turret 24 includes a hollow head 26 having a cylindrical or prismatic outer shape and a head 2.
6 and a hollow cylindrical shaft portion 28 extending concentrically in the axial direction from one axial end surface. Turret 24 head 26
Are arranged so as to protrude outward from a front end surface (right end in the figure) of the support base 20, and a plurality of tool mounting portions 30 for mounting the tools 22 are provided on the radially outer peripheral surface at predetermined index angles. Can be The tool mounting portions 30 rotatably mount a fixed tool mounting portion 30a for fixing a fixed tool 22a such as a cutting tool via a holder 32 and a rotary tool (not shown) such as a drill as shown in the figure. Tool mounting part 30b for
And Further, the rotary tool mounting portion 30b is formed at two locations separated from each other in the axial direction at one indexing angle position.

The rotating tool includes a head 26 and a shaft 28
Generally, the rear end (left end in the figure) of the support base 20 via a drive shaft and a drive gear (both not shown) installed inside the
Can be driven by a dedicated servo motor (not shown) installed in the camera. However, the turret 24 is not
It is not essential to provide the fixed tool mounting portion 30a
It is also possible to provide only. In this case, the turret tool rest device 10 does not include a servomotor as a driving source for the rotary tool.

The shaft 28 of the turret 24 is rotatably received in the turret receiving cavity 34 of the support 20 and at its rear end, ie, the end opposite the head 26, via a gear train 36, the turret rotation. It is connected to a servo motor 38 which is a driving source. The servomotor 38 is fixedly connected to, for example, the rear end (the left end in the figure) of the support base 20. Servo motor 3
8, the turret 24 performs the turning indexing operation, and the desired tool 22 mounted on the desired tool mounting portion 30 is rotated.
Select

The turret tool rest apparatus 10 includes a movable engagement member 40 that can engage with both the support base 20 and the turret 24 as locking means for preventing unnecessary rotation of the turret 24 after the rotation indexing. A drive mechanism (described later) for moving the movable engagement member 40 between the engagement position and the disengagement position is provided. The movable engagement member 40 includes a hollow cylindrical main body 42 slidably supported on a cylindrical inner wall surface 34 a defining a turret receiving cavity 34 of the support base 20, and an axial direction of the main body 42. A plurality (for example, three) of legs 44 extending in the axial direction from the rear end surface (the left end in the figure) so as to be circumferentially separated from each other, and a ring connected to the rear ends (the left end in the figure) of the legs 44 The cam portion 46 and the annular coupling portion 4 attached to the axial front end surface (the right end in the figure) of the main body portion 42 by a plurality of bolts 47.
8 is provided.

The main body 42 of the movable engaging member 40 is supported on the cylindrical inner wall surface 34a of the support base 20 so as to prevent the rattling in the radial direction. In addition, the main body 42 includes the turret 24.
And a cylindrical inner peripheral surface 42a acting as a sliding bearing for supporting the shaft portion 28 so as to be rotatable and axially movable. The plurality of legs 44 of the movable engagement member 40 are respectively provided in the plurality of holes 52 formed in the annular wall 50 behind (to the left in the figure) the cylindrical inner wall surface 34a of the support base 20 in the axial direction. It is movably received. Therefore, these legs 44 are
Of the movable engagement member 40
Can be moved only in the axial direction within the support base 20.

The annular coupling part 4 of the movable engagement member 40
8 has a plurality of teeth 54 radially arranged at a predetermined pitch on the front end surface (right end in the figure). The annular coupling portion 48 is adapted to move axially with the body portion 42 around the shaft portion 28 of the turret 24 to engage a corresponding coupling element. In addition, the annular coupling part 4
In order to reduce the impact when the engaging member 8 engages with the corresponding coupling element, a disc spring 56 is disposed between the main body portion 42 and the annular coupling portion 48, and the annular coupling portion 48 is attached with the disc spring 56. The main body 42 can be approached against the force. At this time, preferably, the disc spring 56 is slightly compressed in advance, and the main body 42 and the annular coupling portion 4 are compressed.
8 is arranged.

The annular coupling part 4 of the movable engagement member 40
As a corresponding coupling element of No. 8, an annular ring having a number of teeth 58 radially arranged at a predetermined pitch on a rear end face (left end in the figure) near an axially open end of the turret receiving cavity portion 34 of the support base 20. The fixed coupling element 60 is fixed.
As another corresponding coupling element of the annular coupling portion 48, a large number of teeth 62 are radially formed at a predetermined pitch on the rear end face (the left end in the figure) near the connection portion between the head portion 26 and the shaft portion 28 of the turret 24. The annular rotating coupling element 64 provided and fixed is fixed. Annular fixed coupling element 6
The multiple teeth 58 of the zero and the multiple teeth 62 of the annular rotary coupling element 64 are disposed axially facing the multiple teeth 54 of the annular coupling portion 48 of the movable engagement member 40.
Also, both teeth 58, 62 are provided with the annular rotary coupling element 6
While the 4 rotates integrally with the turret 24, they can be radially aligned with each other at a predetermined rotational position.

In the situation shown in FIGS. 2 and 3, the multiple teeth 58 (ie, the fixed teeth) of the annular fixed coupling element 60 are shown.
And a number of teeth 62 (i.e., rotating teeth) of the annular rotary coupling element 64 are radially aligned with each other and between the circumferentially adjacent teeth 58, 62 of the movable engagement member 40. One tooth 54 of the annular coupling part 48
(That is, moving teeth) are inserted (see FIG. 4A). Thereby, the rotation of the annular rotary coupling element 64 with respect to the annular fixed coupling element 60 is prevented,
Therefore, the rotation operation of the turret 24 with respect to the support base 20 is prevented. That is, in this state, the movable engagement member 40
Is located at the most front end (right end in the figure) engagement position within the axial movement range.

While the movable engaging member 40 is in the above-described engaging position, the processing of the bar W gripped by the rotating spindle 12 is performed by the tool 22 mounted on the head 26 of the turret 24. During this time, the turret 24 is firmly fixed to the support base 20 by the above-described coupling structure, with a strength against the stress applied to the tool 22 at the time of processing and sufficient strength to maintain the processing accuracy. In order to further improve such engagement strength, in the illustrated turret tool rest device 10, the second disc spring 6 is disposed between the support base 20 and the turret 24.
6 are installed.

The second disc spring 66 is provided on the rear shoulder surface 5 of the annular wall 50 behind (to the left in the figure) the cylindrical inner wall surface 34a of the support base 20.
0a and a front end surface 68a of a sleeve 68 fixed near the rear end (left end in the figure) of the shaft portion 28 of the turret 24.
It is preferably held in a slightly compressed state in advance, and acts to bias the turret 24 rearward (to the left in the figure).
Thus, when the movable engagement member 40 moves to the engagement position, the turret 24 is prevented from moving forward (to the right in the figure) with the movement, and the teeth 5 of the annular coupling portion 48 are prevented from moving.
4 and the teeth 62 of the annular rotary coupling element 64 are securely engaged, and both teeth 54, 62 are in the engaged position.
Is stably maintained under the urging force.

When the movable engagement member 40 is moved rearward (to the left in the figure) from the engagement position shown in the drawing and is placed in the disengagement position, the teeth 54 of the annular coupling portion 48 are brought into contact with the teeth of the annular fixed coupling element 60. 58 and teeth 6 of the annular rotary coupling element 64
2 (see FIG. 4B). As a result, the annular rotary coupling element 64 can freely rotate with respect to the annular fixed coupling element 60, and therefore, the rotation operation of the turret 24 with respect to the support base 20 is released, and the turret 24 is placed in a state where it can be pivotally indexed. .

The annular cam portion 46 of the movable engagement member 40 constitutes a part of a drive mechanism for causing the movable engagement member 40 to move between the engagement position and the disengagement position. As shown in FIG. 3, the annular cam portion 46 slides into a groove cam ring element 72 having a U-shaped cross section having an annular groove 70 that opens radially outward, and an annular groove 70 of the groove cam ring element 72. And a driven ring element 74 that is receivable. The grooved cam ring element 72 includes a plurality of legs 4 of the movable engagement member 40.
4 are integrally connected. The grooved cam ring element 72 and the driven ring element 74 are both annular members, are arranged concentrically with each other, and are relatively rotatable about a common axis.

The grooved cam ring element 72 has a pair of flanges 76 projecting axially, ie, in mutually approaching directions, over the entire radially outward opening of the annular groove 70. A cam groove 80 having a curved portion 78 as shown in FIG. 5 is formed between the flanges 76. Driven ring element 74
Has a dimension that is substantially free of rattling in the radial direction in the annular groove 70 of the grooved cam ring element 72 and can be moved a predetermined distance in the axial direction. Further, the driven ring element 74
Is a cylindrical projection 8 projecting radially outward at a desired position in the circumferential direction.
2 is provided. The cylindrical projection 82 is received in a cam groove 80 defined between the pair of flanges 76 of the grooved cam ring element 72 and has a dimension that allows movement without substantially rattling along the cam groove 80. . The axial dimensional difference between the annular groove 70 and the driven ring element 74 is an amount that does not prevent at least the cylindrical projection 82 from passing through the curved portion 78 of the cam groove 80.

Therefore, as shown in FIGS. 5A and 5B, when the driven ring element 74 rotates in the annular groove 70 of the groove cam ring element 72, the cylindrical projection 82 moves the curved portion 78 of the cam groove 80. Upon passing there will be a relative axial movement between the grooved cam ring element 72 and the driven ring element 74.

Here, in the turret tool rest apparatus 10, behind the annular wall 50 of the support base 20 (left side in FIG. 3), a space capable of accommodating the entire annular cam portion 46 is defined between the turret tool rest apparatus 10 and the support base 20. The formed annular lid 84 is fixed to the support base 20 from behind the annular cam portion 46. Between the support base 20 and the annular lid 84, the grooved cam ring element 72 does not rattle in the radial direction and can be moved a predetermined distance in the axial direction. This distance corresponds to a relative axial movement distance generated between the grooved cam ring element 72 and the driven ring element 74 when the cylindrical projection 82 passes through the curved portion 78 of the cam groove 80. On the other hand, the cylindrical projection 82 of the driven ring element 74
Are provided with an annular lid 84 and a rear shoulder surface 86 provided on the inner surface of the support base 20.
In this case, the movement in the circumferential direction, that is, the rotation of the driven ring element 74 is permitted, but is held immovable in the axial direction.

According to such a configuration, when relative movement in the axial direction occurs between the grooved cam ring element 72 and the driven ring element 74 of the annular cam portion 46 as described above, the support base 20 and the annular lid 84 are formed. The grooved cam ring element 72 moves in the axial direction with respect to the driven ring element 74 fixed in the axial direction. As a result, the groove cam ring element 72
The main body portion 42 and the annular coupling portion 48 connected to each other via the leg portion 44 move in the axial direction. In this way,
The axial movement of the movable engagement member 40, that is, the movement between the aforementioned engagement position and the disengagement position is realized.

Next, the annular groove 7 of the groove cam ring element 72
A mechanism for rotating the driven ring element 74 within zero will be described. As shown schematically in FIGS. 6 and 7, the tool feed stand 18 of the turret tool rest device 10 has a cam side surface 88 as shown in FIG. 6 on its rear end surface, that is, the end surface away from the rotary spindle 12. The cam plate member 90 is fixedly provided. On the other hand, the annular cam portion 46 of the movable engagement member 40 includes a driven arm 92 projecting radially outward from the driven ring element 74 at a position different from the cylindrical projection 82. The free end 94 of the driven arm 92 abuts on the cam side surface 88 of the cam plate member 90.

When the support base 20 moves in the X-axis direction on the tool feed base 18, the movable engaging member 40 moves in the X-axis direction with respect to the tool feed base 18 together with the support base 20, and accordingly, the annular cam portion 48 The free end 94 of the driven arm 92 slides along the cam side surface 88 of the cam plate member 90. as a result,
The driven arm 92 swings according to the shape of the cam side surface 88,
The driven ring element 74 rotates in the annular groove 70 of the grooved cam ring element 72, and the cylindrical projection 82 moves along the cam groove 80. At this time, when the cylindrical projection 82 moves beyond the curved portion 78 of the cam groove 80, the groove cam ring element 72 moves in the axial direction as described above. In the example of FIG. 6, the driven ring element 74 includes three cylindrical projections 82 at equal intervals in the circumferential direction. Is formed with a curved portion 78.

More specifically, at the position shown in FIG.
The support table 20 is disposed on the tool feed table 18 close to the axis of the processing spindle 12, and the tool 22 is disposed at a processing operation position close to the bar W. At this time, the free end 94 of the driven arm 92 is engaged with the recess 9 of the cam side surface 88 of the cam plate member 90.
6, the driven arm 92 or the driven ring element 74 is held at a predetermined angular position with respect to the grooved cam ring element 72. At this time, the cylindrical projection 82 is
As shown in (a), it is arranged adjacent to the curved portion 78 of the cam groove 80. Then, the groove cam ring element 72, which is prevented from rotating by the leg portion 44, moves axially forward (to the right in FIG. 3) in the support base 20, and accordingly, the entire movable engagement member 40 is moved as described above. At the engaged position.

While the movable engagement member 40 is at the engagement position,
Annular coupling part 48 and annular stationary coupling element 6
As a result, the above-mentioned disc spring 56 is slightly compressed from the initial state, and the resultant reaction force of the disc spring 56 causes the main body 42 of the movable engagement member 40, the groove cam ring element 72 and the like to move. Through the cylindrical projection 82 of the driven ring element 74
To be loaded. As a result, the cylindrical projection 82 is clamped under pressure between the driven ring element 74 and the above-described annular lid 84, so that the rotation of the driven ring element 74 (that is, the driven arm 92) in the grooved cam ring element 72. Directional movement is restricted. Thus, the turret 24 is mounted on the support base 2.
0, and is fixedly held at 0, so that the bar machining operation by the tool 22 is stably performed. Here, even when the support base 20 approaches the bar W from the position shown in FIG. 6, the angle of the driven arm 92, that is, the driven ring element 74 with respect to the groove cam ring element 72 does not substantially change, and therefore the movable engagement is performed. Member 4
It will be appreciated that 0 is maintained in the engaged position to ensure that rotation of the turret 24 is prevented.

When the machining operation with one tool 22 is completed, the support table 20 moves on the tool feed table 18 in a direction away from the axis of the machining spindle 12, and the tool 22 is arranged at the tool change position (see FIG. 8). . At this time, the free end 94 of the driven arm 92 is engaged with the concave portion 96 of the cam side surface 88 of the cam plate member 90.
, And abuts on the end face 98. As a result, the driven arm 92, that is, the driven ring element 74 rotates clockwise from the predetermined angular position in FIG. 6 with respect to the groove cam ring element 72, and reaches the angular position in FIG. At this time, the cylindrical projection 82 has moved beyond the curved portion 78 of the cam groove 80 as shown in FIG. As a result, the grooved cam ring element 72 is moved axially rearward in the support base 20 (FIG. 3).
To the left), and the entire movable engaging member 40 is accordingly located at the above-mentioned detached position. In this state, the turret 24 is released from the fixed state. Therefore, a turning tool is operated by driving the servo motor 38 to select a desired tool.

As described above, in the turret tool rest apparatus 10, the engagement / disengagement drive mechanism for fixedly holding and releasing the turret 24 at the indexing position on the support base 20 is provided with the tool 22 at the machining operation position. The interlocking device, which operates in conjunction with the movement of the support base 20 for carrying between the tool feed position and the tool exchange position, that is, the cam plate member 90 provided on the tool feed base 18 and the annular cam portion 46 of the movable engagement member 40 Provided driven arm 9
2. An interlocking device including a cylindrical projection 82 and a cam groove 80. Therefore, since the engagement / disengagement drive mechanism can be electrified without adding a new servo motor, the effects of reducing noise and air pollution, improving response accuracy, suppressing production and operation costs, and the like, are exhibited, and the mounted Further downsizing and higher performance of the machine can be promoted.

[0037]

As is apparent from the above description, according to the turret tool rest apparatus of the present invention, the engagement / disengagement drive for fixedly holding and releasing the turret at the indexing position on the support stand. The mechanism can be electrified without adding a new motor, which has the effects of reducing noise and air pollution, improving response accuracy, suppressing manufacturing and operating costs, and further improving the installed machine tools. There is provided a turret tool rest device capable of promoting downsizing and high performance of a turret.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an automatic turning machine equipped with a turret tool rest device according to a first embodiment of the present invention.

FIG. 2 is a sectional front view of the turret tool rest apparatus of FIG. 1;

FIG. 3 is an enlarged partial sectional front view of the turret tool rest device of FIG. 2;

FIG. 4 is a view for explaining an engagement / disengagement operation of an engagement mechanism, which is shown at respective positions of (a) an engagement position and (b) a disengagement position.

FIG. 5 is an enlarged front view of an annular cam portion of the movable engagement member.
(A) The engagement position and (b) the disengagement position are shown.

FIG. 6 is a schematic side view of the turret tool rest device of FIG. 1 illustrating the operation of the drive mechanism, and shows the drive mechanism in an engaged position.

FIG. 7 is a schematic bottom view of the turret tool rest device of FIG. 1;

FIG. 8 is a schematic side view of the turret tool rest device of FIG. 1 illustrating the operation of the drive mechanism, showing the drive mechanism in a detached position.

[Explanation of symbols]

 Reference Signs List 18 tool feed stand 20 support 22 tool 24 turret 38 servo motor 40 movable engagement member 42 main body 44 leg 46 annular cam 48 annular coupling 54, 58, 62 Tooth 70 ... Circular groove 72 ... Groove cam ring element 74 ... Driving ring element 78 ... Bending part 80 ... Cam groove 82 ... Cylinder projection 88 ... Cam side surface 90 ... Cam plate member 92 ... Driving arm

Claims (4)

[Claims] 1. A support base movably mounted on a machine tool along a given coordinate axis, and rotatably supported by the support base to carry a large number of tools at predetermined intervals around a rotation axis. A turret tool rest apparatus comprising: a turret; and a locking means for fixedly holding the turret with respect to the support at a rotation indexing position on the support, wherein the locking means includes the turret and the support. An engagement mechanism having at least a fixed-side engagement element and a movable-side engagement element that are installed in association with both the base and engageable with each other, and the movable-side engagement element of the engagement mechanism is fixed to the fixed mechanism. A drive mechanism that moves between an engagement position that engages the side engagement element to prevent rotation of the turret and a disengagement position that disengages from the fixed engagement element and releases rotation of the turret. The drive mechanism is configured to move the tool to a machining operation position and In conjunction with the supporting table moving to carry between a replacement position, comprise a linkage for moving the movable-side engaging element,
A turret tool rest device. 2. The interlocking device of the drive mechanism, wherein the interlocking device is provided on the machine tool and the support table, and has one end slidably in contact with the first cam and the other end. And a driven arm that engages with the movable-side engaging element of the engaging mechanism. The movable-side engaging element is moved to the engagement position by the swing of the driven arm that occurs when the support base moves. The turret tool rest device according to claim 1, wherein the turret tool rest device is configured to move to and away from the detached position. 3. The turret tool rest apparatus according to claim 2, wherein a second cam is formed between the other end of the driven arm and the movable-side engagement element of the engagement mechanism. 4. The fixed-side engagement element of the engagement mechanism,
The movable side engaging element includes a plurality of rotating teeth fixedly formed on the turret, the fixed teeth of the support pedestal, and the turret. Moving teeth that are installed so as to be engageable with both of the rotating teeth, and wherein the drive mechanism moves the moving teeth to at least the engagement position where the moving teeth engage with both the fixed teeth and the rotating teeth. The turret tool rest device according to any one of claims 1 to 3, wherein the turret tool rest device is configured to be moved between the tooth and the separation position where the tooth is separated from the tooth.