JPH0760505A - Cutting tool setting method - Google Patents

Abstract

PURPOSE:To set a cutting tool in a lathe for machining a work in such a way that one point of a tip of the cutting tool is applied to it constantly, in a short time of at ultra-high precision in a state where the work is fitted to a headstock. CONSTITUTION:A tool box 9 on which a cutting tool 10 having a tip of a radius R of curvature is fitted and which is reciprocatingly rotate about an axis of a vertical shaft rotation axis B is installed on a turntable 8 through a first to a third adjustment tables 21... which are movable in a vertical direction parallel to the axis B and in two axial directions perpendicular to the axis B. A microscope 23 is fixed on a headstock 3 to be directed in a Z-axis direction, and a TV set 25 to display an enlarged image of a tip position of the cutting tool 10 through a TV camera is provided. The cutting tool 10, of which the tip radius R of curvature is measured preliminarily, is positioned at a measuring position where the vertical shaft rotation axis B and the center of the microscope 23 coincide with each other, and desired adjustment including that for a specified angle is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool setting (centering) method in a turning device for processing a work surface of a work by three-axis control so that one point of the tool cutting edge always acts.

[0002]

2. Description of the Related Art B of the X and Z axes and the longitudinal rotation axis in a plane
In a turning device that performs machining so that one point of the cutting tool always acts on the machining surface of the workpiece by three-axis control with the axis, the working point of the cutting tool is the front-back and left-right direction with respect to the B-axis center of the vertical rotation axis. It is necessary to center and set the bite so that there is no deviation in Conventionally, this amount of deviation has been determined by measuring the error in the processed shape of the workpiece and observing the remaining portion in the center of the workpiece with a microscope.

[0003]

As described above, in order to measure the error in the machining shape of the work and observe the microscope, the work is once removed from the turning device, measured and observed, and then the work is attached to the turning device again and corrected. Since it is necessary to repeat the work of carrying out the work, the workability is poor, and it takes a long time to perform the ultra-precision centering of the bite.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is characterized by a bite setting method that includes a headstock that rotatably supports a main spindle, and a rotation axis of the main spindle. A rotary table that rotates about the orthogonal vertical axis B as the center of rotation, a Z-axis direction parallel to the main axis of rotation, and Z
A slide table that reciprocates in an X-axis direction that is orthogonal to the axial direction and the vertical axis B of rotation center, a vertical direction that is parallel to the vertical axis of rotation B axis on the rotary table, and is orthogonal to the vertical axis of rotation B axis. A tool rest installed via a two-axis movable adjustment stand and having a tool bit of a cutting edge with a radius of curvature R attached thereto, and a microscope fixed to the headstock in the Z-axis direction toward the tool rest. In a turning device equipped with an image receiver for enlarging the cutting edge position of the cutting tool with a television camera in this microscope, the cutting tool whose curvature radius R of the cutting edge is measured in advance is referred to as the vertical axis of rotation table B axis of the rotary table. It is located at a measurement position where the center of the microscope coincides, the tip of the cutting tool is made to coincide with the center of the microscope by the adjusting table, the slide table is moved by the curvature radius R of the cutting edge of the cutting tool, and only the curvature radius R of the cutting tool is set. The leveling table is moved in the direction opposite to the moving direction of the slide table, the rotary table is then rotated by a predetermined angle, and the adjusting table is moved by the amount of tool deviation Δx at this time, and the radius of curvature of the cutting edge of the cutting tool. The adjusting table is moved in the direction opposite to the moving direction of the adjusting table by R, and the slide table is moved in the direction opposite to the moving direction of the slide table by the radius of curvature R of the cutting edge of the cutting tool to center the cutting tool. It is a thing.

[0005]

According to the above method, with the work mounted on the headstock, the position of the cutting edge of the cutting tool mounted on the tool rest is magnified on the image receiver by the microscope through the TV camera, and X,
By controlling the Z-axis and the B-axis of the vertical rotation axis, it is possible to center an ultra-precision bite in a short time.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a turning device in which the method according to the invention is carried out. In FIG. 1, reference numeral 26 denotes a bed, and this bed 2
A spindle table 1 is mounted on a spindle table 6 by a spindle table feed servomotor 2 so as to be movable back and forth in the Z-axis direction, and a spindle headstock 3 is fixedly mounted on the spindle table 1. A spindle 4 is rotatably supported on the spindle stock 3 in the Z-axis direction, and a work 11 is attached to the tip thereof.

A microscope 23 and a television camera 24 for projecting an image enlarged by the microscope 23 on a receiver 25 are fixed to the side of the headstock 3 through a bracket 22 in the Z-axis direction.

A slide table 6 is mounted on a bed 26 in front of the microscope 23 by a slide table feed servomotor 7 so as to be movable back and forth in an X-axis direction orthogonal to the X-axis direction. Is Figure 2
As also shown, the rotary table 8 is provided so as to be rotatable about the vertical axis of rotation B axis (hereinafter simply referred to as B axis).

As shown in FIG. 1 and FIG. 2, a first adjusting table 17 which moves forward and backward on the rotary table 8 in the A axis direction orthogonal to the B axis, and the B axis and the A axis on the first adjusting table 17. A second adjusting table 19 that moves forward and backward in the C-axis direction orthogonal to the axis and a third adjusting table 21 that moves up and down in the D-axis direction parallel to the B-axis are provided on the second adjusting table 19, and the uppermost stage is provided. No. 3 adjustment stand 2
A tool rest 9 is fixed on the top 1. The first to third adjustment tables 1
The forward / backward movement of 7, 19, 21 is a fine movement adjustment, and therefore, the micrometer heads 16, 18,
Twenty operating mechanisms are provided.

Explaining in detail, each adjustment stand 17, 19,
Reference numeral 21 has a fixed side and a movable side that moves in the A-axis, D-axis or C-axis direction, and stoppers 16a, 18a, 2 are provided on each movable side.
0a is fixed, and a micrometer head 1 is provided on each fixed side.
6, 18, 20 are attached. Micrometer heads 16, 18 and 20 simple 16b, 18b, 2
When 0b is turned, the spindles 16c, 18c, 20c move forward, and each movable side moves slightly. How much the movable side has moved can be read on the scales of simple 16b, 18b and 20b.

A drive control device for the spindle table 1, the slide table 6, and the rotary table 8 will be described with reference to FIG.
Reference numeral 32 is a numerical controller, which is connected to an operation panel 33 and a memory 34 which stores a measurement program and a machining program. The numerical controller 32 and the spindle table feed servomotor 2 are connected via a drive circuit 35,
The numerical controller 32 and the slide table feed servomotor 7 are connected via a drive circuit 36, the numerical controller 32 and the rotary servomotor of the rotary table 8 are connected via a drive circuit 37, and the spindle table 1 And the mirrors 30a and 30b are fixed to the slide table 6, and the bed 2
Laser interference side lengths 31a, 31b facing the mirrors 30a, 30 are fixedly mounted on a fixed portion such as 6, and the amount of movement of the headstock 3 and the slide table 6 is input to the numerical controller 32. The feed of the slide table 6 is configured to be feedback-controlled.

The operation panel 33 has an X-axis manual button 33.
a, Z axis manual button 33b, B axis manual button 33c, measurement program execution button 33d, and machining program execution button 33e are provided.

The method of the present invention is executed by the turning device having the above-mentioned structure. The method will be described below with reference to FIGS. 3, 4, and 5.

The radius of curvature R of the cutting edge of the cutting tool 10 (hereinafter simply referred to as the radius of curvature R) is measured by a measuring device installed at a place different from the turning device (step 43 in FIG. 5).
The curvature radius R is measured electrically by bringing a contactor into contact with the blade tip of the cutting tool 10 mounted on the tool rest 9 by an R measuring device (not shown). The cutting tool 10 whose radius of curvature R has been measured is mounted on the tool rest 9 (step 44).

Thereafter, as shown in FIG. 4, the slide table 6 is moved to X = X1 (step 40) by the measuring program, the spindle table 1 is moved to Z = Z1 (step 41), and the rotary table 8 is further moved. B = B1
The operation of indexing to (step 42) is performed. This allows
The moving direction of the first adjusting table 17 is the same as the moving direction of the slide table 6, and the tool rest 9 is positioned at a predetermined position corresponding to the microscope 23. The bite 10 is moved to the measurement position by the microscope 23 so that the vertical axis B axis of the vertical axis of the rotary table and the center of the microscope coincide (step 45), and the tip of the bite 10 is moved by the first adjusting table 17 and the third adjusting table 21. Match the center of the microscope 23 (step 4)
6).

Next, the slide table 6 is moved backward by the radius of curvature R (step 47), and the tool 10 is moved by -R by the backward movement of the slide table 6 by the first adjusting table 1.
7, the forward movement (step 48) is performed to match the front and rear positions of the center of the B axis and the center of the radius of curvature R.

Then, the rotary table 6 is rotated by a required angle θ (step 49). The rotation angle θ of the rotary table 6 is a range in which the microscope 23 observes the cutting edge of the cutting tool 10, and is in a range of 15 ° to 30 °. Within this angle range, the cutting edge of the cutting tool 10 is within the field of view of the microscope 23. After rotating the rotary table 6, the microscope 2
The scale 25a of 3 is read (step 50). At this time, if the left and right positions of the center of the B-axis and the center of the radius of curvature R match, the position of the cutting edge of the cutting tool 10 which is observed by the microscope 23 and enlarged on the image receiver 25 through the television camera 24 is moved. Instead, it is located at point 0 on the scale of the microscope 23 in FIG.

However, if the left and right positions of the center of the B-axis and the center of the radius of curvature R are deviated by Δx in the C-axis direction as shown in FIG. 3, the cutting edge position of the cutting tool 10 is deviated by Δx sin θ back and forth. It is read by the scale 25a which is enlarged and projected on the image receiver 25 through the camera 24.

Therefore, the shift amount Δx of the bite 10 is calculated (step 51), and the shift amount Δx is simply 1
8b to rotate the second adjusting table 19 (step 5
2) The first adjusting table 17 is moved by the radius of curvature R (step 53), and the slide table 6 is moved by -R (step 54). As a result, the center of the B-axis and the cutting edge of the cutting tool 10 are set to match each other.

By the above operation, the bite 10 mounted on the tool rest 9 acts on the work 11 mounted on the spindle 4 by one point of the bite, despite the rotation of the rotary table 8. An ultra-precision set (centering) can be obtained in a short time. Set of this bite 10 (core)
After that, the rotary table 8 is rotated back by the predetermined angle θ to align the axis of the cutting tool 10 with the axis of the spindle 4, and the machining program execution button 33e is pressed to machine the workpiece 11.

In the above embodiment, the headstock 3 is moved in the Z-axis direction and the rotary table 8 is moved in the X-axis direction. However, the rotary table 8 is moved in the Z-axis direction and the headstock 3 is moved in the X-axis direction. You can move it.

[0022]

As described above, according to the method of the present invention,
A set of cutting tools (centering) in a turning device that always processes the work surface of the work so that one point of the cutting edge of the tool acts.
With the work attached to the headstock, the blade tip position of the tool attached to the turret is magnified on the receiver via the TV camera by the microscope, and the turret is adjusted in the vertical direction and B It can be moved in two axial directions orthogonal to the axis, and can be performed with high precision in a short time.

[Brief description of drawings]

FIG. 1 is a plan view of a turning device in which the method of the present invention is performed.

FIG. 2 is a side view showing details of a tool post portion.

FIG. 3 is an explanatory view of the method of the present invention.

FIG. 4 is a flowchart of the positioning operation in the pre-measurement stage of the method of the present invention.

FIG. 5: A set of cutting tools (centering) according to the method of the present invention
Flow chart of operation

[Explanation of symbols]

 1 Spindle table 6 Sliding table 8 Rotating table 9 Turret 10 bytes 17 Tool 1 adjusting table 19 2nd adjusting table 21 3rd adjusting table B Center of vertical axis of rotating table R Curved radius of cutting edge △ x Tool blade misalignment

Claims (1)

[Claims] 1. A headstock that rotatably supports a main spindle, a rotary table that rotates as a vertical axis of rotation B axis orthogonal to the main axis of rotation of the main spindle, a Z-axis direction parallel to the main-axis rotation axis, and a Z-axis direction. A slide table that reciprocates in the X-axis direction orthogonal to the vertical axis rotation center B axis, and a vertical table parallel to the vertical axis rotation center B axis on the rotary table and two axes orthogonal to the vertical axis rotation center B axis. And a microscope which is installed via an adjusting table movable in any direction, and in which a tool bit of a cutting edge having a radius of curvature R is attached, a microscope fixed to the headstock in the Z-axis direction toward the tool rest, and this microscope. In a turning device equipped with an image receiver for enlarging the cutting edge position of the cutting tool through a television camera, a cutting tool whose curvature radius R of the cutting edge is measured in advance is used as a vertical axis of rotation table B axis and a microscope center. The measurements that match Positioned at a fixed position, the tip of the cutting tool is aligned with the center of the microscope by the adjusting table, the slide table is moved by the curvature radius R of the cutting edge of the cutting tool, and the adjusting table is moved by the curvature radius R of the cutting tool. In the opposite direction, and then the rotary table is rotated by a predetermined angle, and the adjusting table is moved by the amount of tool deviation Δx at this time, and the adjusting table is moved by the radius of curvature R of the cutting edge of the cutting tool. Move in the opposite direction to
Further, the bite setting method is characterized in that the slide table is centered by moving the slide table in a direction opposite to the moving direction of the slide table by the curvature radius R of the cutting edge of the bite.