JPH0588852U - Radius measuring device for cutting edge of cutting edge of rod-shaped tool - Google Patents

Abstract

(57) [Summary] [Purpose] The tool presetter function of the tool to be measured and the radius measurement function of the cutting edge arc are switched and exchanged. [Structure] When used as a tool presetter, a tool presetter portion C is attached to the measuring device body A, and when used as a radius measurement of the cutting edge of the tool T to be measured, the measuring device body A is used to measure the tool presetter C. Is removed and replaced with the radius measuring section B.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is installed in the measuring part of a tool presetter or installed on a machining center machine, and is used for cutting tools such as ball end mills and radial end mills, especially when the cutting tool has an arc-shaped cutting edge. The present invention relates to a measuring device used for evaluation of blade dimension measurement, accuracy inspection, and the like.

[0002]

[Prior Art]

 The tool presetter used for conventional machining centers, NC milling machines, etc. has two gauges such as dial gauges that can adjust the axial and radial dimensions of the tool cutting edge in each direction. In general, the size of each tool is measured independently, and some tool presetters are equipped with a projection device to evaluate the shape. In addition, there is a dedicated measuring device equipped with all the moving axes required for measuring the arc part of the ball end mill, but there are 8 or more driving axes, which is expensive and does not have a function as a tool presetter. ..

[0003]

[Problems to be solved by the device]

 It is not possible to accurately confirm the radius accuracy of the arc cutting edges of ball end mills and radius end mills with the tool presetters currently on the market and widely used.

Even with a tool presetter equipped with a projection device, it is only possible to check the approximate shape, and it is possible to use the spiral arc cutting edge currently on the market or the arc cutting edge part having a complicated geometric shape. On the other hand, the radial dimension accuracy of an arbitrary part cannot be easily and accurately inspected and evaluated accurately.

In view of the above problems, the present invention does not use a dedicated measuring device, does not impair the function of a conventional tool presetter, and accurately measures the arc edge of a ball end mill or a radius end mill. It is an object of the present invention to provide at low cost a device that can be inspected and can easily confirm the installation accuracy inspection when exchanging the cutting edge of the throwaway ball end mill which has been frequently used recently.

[0006]

[Means for Solving the Problems]

 As shown in FIGS. 1 and 2, the problem solving means according to the present invention is a measuring device main body A, a radius measuring portion B for measuring a radius of an arbitrary position of a tip cutting edge cutting edge of a tool T to be measured, and a tool cutting edge axis. A tool presetter portion C for measuring only the dimension in the direction Z and the dimension in the radial direction X, and a mounting means 31 for replacing and mounting the radius measuring portion B and the tool presetter portion C on the measuring device body A are provided. The measuring apparatus body A has a base 1, an insertion hole 3 into which the tool T to be measured is inserted on the upper surface of the base 1, and a tool T to be measured inserted in the insertion hole 3 as a vertical axis Z. The radius measuring section B includes a support plate 27 attached to the measuring device main body A by the attaching means 31, and a tool axis Z to be measured on the support plate 27. A rotating body 17 which is rotatable about an orthogonal axis X, The centroid moving body 15 that moves in the direction X of the center of rotation of the rotating body 17, the orthogonal moving body 13 that moves in a direction Y that is orthogonal to the moving direction axis X of the centripetal moving body 15 in a plane perpendicular to the moving direction axis X, The measuring element 12 attached to either the body 13 or the centripetal moving body 15 is provided.

[0007]

[Action]

 In the above problem solving means, when using as a tool presetter, the tool presetter portion C is attached to the measuring device main body A, and the dimension of the tool T to be measured T in the axial direction Z and the dimension in the radial direction X are respectively set. Measure in the direction of.

On the other hand, when it is used for measuring the radius of the cutting edge of the tool T to be measured, the tool presetter C is removed from the measuring apparatus main body A and replaced with the radius measuring section B for measurement.

At this time, by rotating the rotating body 17, the measuring element is swung from the tip portion of the tool to the outer diameter portion or in the opposite direction, and at any position including the middle thereof, the radial direction S Measure the dimensions of.

[0010]

【Example】

 1 is a side view of a tool presetter showing an embodiment of the present invention, FIG. 2 is a perspective view of a radius measuring device showing an embodiment of the present invention, and FIG. 3 is a radius measuring device showing an embodiment of the present invention. FIG. 4 is a side view of the table, FIG. 4 is a diagram showing the measuring principle of the radius measuring device, and FIG. 5 is a diagram showing the measuring shape of the tool.

The radius measuring device of the present embodiment measures an arc portion of a rod-shaped tool T such as a ball end mill as a tool to be measured. , It can also be used as a tool presetter by replacing it with a tool presetter section C that measures only the dimension of the tool cutting edge in the axial direction Z and the dimension of the radial direction X.

(Structure of Measuring Device Main Body) In the measuring device main body A, as shown in FIG. 1, an insertion hole 3 (taper hole) for inserting the rod-shaped tool T in the vertical direction Z is formed on the upper surface of the base 1. Then, the tightening portion (not shown) for tightening and holding the lower portion of the rod-shaped tool T inserted and inserted in the insertion hole 3 and the rod-shaped tool T tightened by the tightening portion are rotated around the vertical axis Z. It has a rotating handle 2 as a tool rotating means.

At a position adjacent to the insertion hole 3 on the upper surface of the base 1, a movable table 5 that is movable back and forth with respect to the insertion hole 3 is attached. At this time, it is moved back and forth with respect to the insertion hole 3. A column 8 projecting in the vertical direction Z is fixed to a table portion 6 on the upper surface of the movable table 5.

A mounting base 7 for removably mounting the radius measuring portion B or the tool presetter portion C with a screw 31 or the like as a mounting means is mounted on the pillar 8 so as to be vertically movable.

The column 8 is hollow, and a spiral rod (not shown) is rotatably housed inside the column 8 so as to be rotatable around the vertical axis Z and rotated by a handle 9.

Then, a part of the mounting base 7 is fitted into the inside of a slit (not shown) opened at the rear of the pillar 8 so that a nut (not shown) fitted to the spiral rod in the pillar 8 is integrally formed. There is.

(Structure of Tool Presetter Section) The tool presetter section C is, as shown in FIG. 1, two measurements capable of measuring the dimension of the tool cutting edge in the axial direction Z and the dimension of the radial direction X in each direction. It is a general one having a child (dial gauge) 10, 11.

Then, the dimension of the rod-shaped tool T in the axial direction (longitudinal direction) Z is read together with one dial gauge 10 and the scale collar of the handle 9 or the scale incorporated in the pillar 8.

Further, the dimension of the rod-shaped tool T in the axial direction (radial direction) X is read together with the other dial gauge 11 and the position of the movable table 7.

The tool presetter C is detachably attached to the attachment base 7 with a screw 31 or the like so that it can be replaced with a radius measuring unit B described later. Basically, the tool presetter C is the same as the conventional product except for this attachment / detachment mechanism. It is specified.

(Structure of Radius Measuring Unit) The radius measuring unit B is replaced with the mounting base 7 in place of the tool presetter unit C, so that the radius value at any position of the arc cutting edge of the ball end mill can be changed. As shown in FIGS. 2 and 3, a support plate 27 that is detachably attached to the attachment base 7 by screws 31 and the like, and a rotation axis around the horizontal axis X is attached to the support plate 27. A rotating body 17 mounted so as to be able to accurately rotate in a vertical plane via a bearing that is formed, a centripetal moving body 15 that moves in the rotation center direction (X direction) of the rotating body 17, and the centripetal movement. An orthogonal moving body 13 that moves in a direction (Y direction) orthogonal to a moving direction axis X of the body 15 and a probe (a dial gauge that is mounted on the orthogonal moving body 13 to measure accurate dimensions). ) 12 and .

To position the rotation angle of the rotating body 17, for example, the rotating handle 18 is rotated in a vertical plane, and the pointer on the rotating body 17 side and the scale 27b on the support plate 27 side are adjusted to desired values. The rotation angle position is set by, and the pin 21 incorporated in the rotation handle 18 is inserted into the recess hole 27a to fix the rotation position. In FIG. 3, reference numeral 20 denotes a spring that biases the pin 21 on the rotary handle 18 side toward the recess hole 27a.

The centripetal moving body 15 moves together with the moving table 5 in the centripetal direction X by the handle 4 of the measuring apparatus main body A.

The orthogonal moving body 13 moves in the Y direction by the rotation of the handle 14 through a deceleration mechanism (not shown) in the centripetal moving body 15.

The measuring element 12 is moved in the direction of the spindle axis S by the rotational force of the rod-shaped micrometer 16 through the speed reducing mechanism inside the rotating body 17. The measuring spindle shaft S rotates in the same direction as the rotation direction of the centripetal moving body 15 as the rotating body 17 rotates.

In FIG. 3, 22 is a holding plate for attaching the rotating body 17 or the like to the mounting base 23, 23 is its set screw, 24 is its thrust direction bearing spacer, and 25 is a bearing for rotation. , 26 are bearing spacers.

(Operation) When used as a tool presetter in the above configuration, as shown in FIG. 1, the tool presetter unit C is attached to the measuring apparatus main body A, and the two probe heads 10 are used as in the conventional case. The dimension of the rod-shaped tool T cutting blade in the axial direction Z and the dimension in the radial direction X are measured in each direction.

On the other hand, when the tool is used for measuring the radius of the cutting edge of the rod-shaped tool T, the tool presetter C is removed from the measuring device main body A and replaced with the radius measuring section B.

Here, in order to make the radius measurement effective, it is necessary that the spindle axis S of the probe 12 accurately and centrically moves with respect to the center point Po of the cutting edge arc of the rod-shaped tool T. is important. The adjustment for that is performed as follows.

First, when the spindle axis S of the tracing stylus 12 is located in the same direction as the vertical axis direction (Z direction) of FIG. 4, the centripetal axis adjustment to the point Po is performed in the centripetal direction (X direction). Is carried out with the handle 4 of the measuring apparatus main body A as shown in FIG.

In the Y direction, the handle 14 of the radius measuring unit B is used as shown in FIG.

Positioning of the rod-shaped tool T in the longitudinal direction, that is, the Z direction is performed by the handle 9 of the measuring apparatus main body A.

Next, as shown in FIGS. 4 and 5, three axes of X, Y, and Z that are directly intersected with each other through the center point Po of the cutting edge arc of the rod-shaped tool T are set. The point Po does not have to be the exact center point of the arc of the cutting edge of the rod-shaped tool T, but may be a temporary radius center. 4 and 5, point P1 is the tip of the ball end mill, and point P2 is the contact point between the arcuate portion and the outer peripheral portion. Here, in the case of true sphere accuracy measurement, Po-P1 = Po-P2 = Ro. Further, D1 is a YZ plane, D2 is an XY plane, and D3 is a ZX plane.

The position adjustment of the tracing stylus 12 and the accurate setting of the radius value are performed, for example, by preparing a gauge whose size is predetermined and inserting the gauge into the hole 3 of the tool presetter.

Then, while rotating the rotating body 17 in the vertical plane D2, an arbitrary position from the point P1 of the cutting edge arc of the rod-shaped tool T to the point P2 (position of angle a ° from the point P2) The radius value Ra at the point Pa is measured.

Here, the reading of the radius value Ra is carried out by using both the dimensionally readable rotary handle 18 and the pointer of the probe 12, as in the rod-shaped micrometer 16 in FIG. In the plane D1, each measurement value is read and recorded while making an accurate circular motion between the points P1 and P2 at an arbitrary radius R _O.

[0037] Then, by rotating the handle 2 of the measuring device main body A, the error between the maximum radius value R and the temporary radius R _O of an arbitrary point Pa of the cutting edge arcs of the rod-shaped tool T in guidance of the probe 12 Accurately inspect any radius R of the ball end mill by reading.

Needless to say, the mounting accuracy inspection at the time of exchanging the cutting edge of the radius end mill and the throwaway ball end mill which has been frequently used can also be performed by shifting the measuring axes X, Y and Z of the probe 12. is there.

As described above, since the measuring function of the arc portion of the rod-shaped tool T and the tool presetting function can be switched over from each other, it is necessary to occupy a large space by arranging a plurality of devices in a factory or the like. Is eliminated, which meets the recent demand for space saving.

Moreover, it is possible to manufacture a tool presetter capable of measuring the radius of the ball end mill at a low cost without requiring a drastic change in specifications with respect to the conventional tool presetter.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention.

For example, in the above-described embodiment, the tracing stylus 12 of the radius measuring section B is attached to the orthogonal moving body 13, but it may be attached to the centripetal moving body 15.

Also, the X, Y, and Z axes may be interchanged with each other.

Further, the device of the present invention is not only mounted on the tool presetter, but is also mounted on, for example, a machining center, and each moving shaft of the machining center is used as an adjusting shaft to measure the radius of the ball end mill. It is also possible to perform on-machine measurement.

Further, although the screw is used as the attachment means 31, instead of this, a fitting hole, a fitting piece or the like may be adopted.

[0046]

[Effect of the device]

 As is apparent from the above description, since the measuring device main body, the radius measuring part, the tool presetter, and the mounting means for replacing and mounting the radius measuring part and the tool presetter on the measuring device main body are provided, the end mill The accuracy of the radial direction at any position of the arc cutting edge of a ball end mill or radius end mill is measured without impairing the function of a so-called normal tool presetter, such as measuring the tool length and radius value of a face mill. It can be tested very easily and accurately. Therefore, there is an excellent effect that the accuracy of the chip when exchanging the cutting edge chip and the mounting accuracy can be quickly inspected.

[Brief description of drawings]

FIG. 1 is a side view of a tool presetter showing an embodiment of the present invention.

FIG. 2 is a perspective view of a radius measuring device showing an embodiment of the present invention.

FIG. 3 is a side view of a radius measuring device showing an embodiment of the present invention.

FIG. 4 is a diagram showing a measurement principle of a radius measuring device.

FIG. 5 is a diagram showing a measurement shape of a tool.

[Explanation of symbols]

 1 Base 2 Tool Rotating Means 3 Tool Insertion Hole 12 Measuring Element 13 Orthogonal Moving Body 15 Centrifugal Moving Body 17 Rotating Body 27 Mounting Base 31 Mounting Means A Measuring Device Main Body B Radius Measuring Unit C Tool Presetter T Measured Tool

Claims (1)

[Scope of utility model registration request] 1. A measuring device body, a radius measuring section for measuring a radius of an arbitrary position of a cutting edge of a tool to be measured, and a tool for measuring only an axial dimension and a radial dimension of the tool cutting edge. A presetter unit and mounting means for replacing and mounting the radius measuring unit and the tool presetter unit on the measuring device body are provided, and the measuring device body inserts and mounts a tool to be measured on a base and an upper surface of the base. And a tool rotating means for rotating the tool to be measured inserted in the insertion hole around the vertical axis, and the radius measuring section is attached to the measuring device body by the attaching means. A supporting plate, a rotating body that is rotatable on the supporting plate around an axis perpendicular to the tool axis to be measured, a centripetal moving body that moves in the direction of the rotation center of the rotating body, and a centripetal moving body of the centripetal moving body. Move in the direction perpendicular to the axis of movement 2. A radius measuring device, comprising: an orthogonal moving body, and a probe attached to either the orthogonal moving body or the centripetal moving body.