JPH0674255U - Jig for workpiece dimension measurement in NC lathe - Google Patents

Abstract

(57) [Summary] [Objective] To provide a measuring jig capable of measuring dimensions with a work set on an NC lathe. [Structure] It is composed of a mounting base and a jig body, and the mounting base can be attached to and detached from the tool rest bite holder in the X-axis direction or the Z-axis direction, while the jig body has a mounting portion for a touch sensor. Then, attach the touch sensor in the X-axis direction or the Z-direction, manually feed the tool rest of the NC lathe in the X-axis direction or the Z-axis direction to bring the touch sensor into contact with the work, and display the feed position to determine the work size. It was possible to measure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig for measuring a workpiece size in an NC lathe, which enables automatic measurement of dimensions while the workpiece is set on the NC lathe.

[0002]

[Prior art]

 In the NC lathe, the dimensions of each part of the product are input to the computer in advance, the work core is taken out and chucked, the work is rotated, and the tool bit of the selected tool post is moved by the distance according to the input data. Products are automatically turned by feeding in the X-axis direction or Z-axis direction. By the way, in order to guarantee the reliability of the obtained product, it is necessary to measure the dimensions of each part of the product, for example, the inner and outer diameters and the length.

Conventionally, dimensional measurements have been performed by using several kinds of measuring instruments such as a caliper, a micrometer, and a cylinder gauge.

[0004]

[Problems to be solved by the device]

 However, with conventional measuring instruments, there are many points that are difficult to measure, and there is no choice but to rely on manual work, and a measurement error (fixed difference) occurs depending on each person who uses the measuring instrument. Moreover, it is necessary to use several kinds of measuring instruments to measure one work, and moreover, each part of the work cannot be measured accurately unless the work is once removed from the NC lathe and set on the measuring table. Therefore, when reworking is required, it is necessary to re-chuck the work to the NC lathe, and the work is very complicated.

In view of such problems, it is an object of the present invention to be able to measure the dimensions of each part of a work while being set on an NC lathe.

[0006]

[Means for Solving the Problems]

 As a result of diligent research conducted by the inventor of the present invention to solve such a problem, in the NC lathe, a mechanism for manually sending the tool post is generally adopted, and when the tool post is sent, its position is displayed. The present invention has been completed, focusing on the fact that the tool can be attached to the tool holder of the turret and manually moved to the workpiece measurement point, and the workpiece dimensions can be measured from the display of the feed position.

That is, the work size measuring jig in the NC lathe according to the present invention is a jig for attaching a touch sensor for measuring the work size to the tool post tool holder of the NC lathe, and the jigs are mutually connected by screw members. It consists of a jig body that is rotatably connected around the Y-axis and a mounting base. The mounting base can be attached to the tool post bite holder with the X-axis feed direction or Z-axis feed direction of the tool post facing. On the other hand, the jig body is provided with a touch sensor mounting portion, and the jig body is rotated around the Y-axis so that the touch sensor mounted on the mounting portion is attached to the X-axis. Direction or Z-axis direction, the tool post is manually fed in the X-axis direction or Z-axis direction, and the workpiece size can be measured from the feed position display of the NC lathe when the touch sensor comes into contact with the workpiece. When What you have done is the summary.

The touch sensor may be of any type such as a light emitting type or a buzzer type. The orientation of the touch sensor is adjusted according to the shape of the workpiece measurement point, etc. In consideration of the operability at that time, the mounting base has a first positioning surface parallel to the plane formed by the X and Y axes of the NC lathe, And a second positioning surface parallel to the plane formed by the Y-axis and the Z-axis is formed, and a positioning piece that can come into contact with the positioning surface of the mounting base is provided on the jig body so that the jig body rotates around the Y-axis. The touch sensor is oriented in the X-axis direction by bringing the positioning piece into contact with the second positioning surface, and the touch sensor is oriented in the Z-axis direction by contacting with the first positioning surface. Is good.

Depending on the type of work, the touch sensor may be selectively attached in either the X axis direction or the Z axis direction of the NC lathe. In this case, the jig main body and the mounting base are integrally formed, and the jig main body is formed with a mounting hole for the touch sensor extending in the X-axis direction and the Z-axis direction of the NC lathe. It is recommended that the inserted touch sensor can be fixed with a screw member.

[0010]

[Action]

 Since the base of the jig is attachable to and detachable from the tool holder of the turret, you can use the empty tool holder without the tool of the turret and attach the touch sensor there.

When measuring dimensions such as the outer and inner diameters of a work, the touch sensor is oriented in the X-axis direction or the Z-axis direction and the tool rest is manually operated in the X-axis direction or the Z-axis depending on the shape of the measurement location. Send it to you. When the touch sensor touches the measurement point of the workpiece, it is detected and known, so the manual feed is stopped. If you look at the display of the NC lathe at that time, you can see the feed position, so you can measure the outer diameter, inner diameter, length, etc. of the work from the feed position, and without removing the work from the NC lathe. The dimensions can be measured.

[0012]

【Example】

 Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show a jig for measuring a workpiece size in an NC lathe according to an embodiment of the present invention. In the figure, a measuring jig 1 is composed of a jig body 2 and a mounting base portion 3, the jig body 2 is formed in a substantially rectangular parallelepiped shape, and the mounting base portion 3 is a bit holder of a tool rest 7 of an NC lathe. It is formed into a rectangular parallelepiped shape that is detachable from the jig 70 and is longer than the jig body 2, and a mounting flange 30 is laterally projected at the tip of the mounting jig 3 to be integrally formed. There is. Some of the bite holders 70 have a cylindrical shape depending on the type of the bite, but in consideration of the case of mounting on the bite holder 70, the measurement jig 1 having the columnar mounting base 3 should be prepared. Good.

A ring-shaped rotation guide shaft 31 is projected on the upper surface of the mounting flange 30, and a bearing hole 20 that fits with the rotation guide shaft 31 is formed on the lower surface of the jig main body 2, and is rotated. A screw insertion hole 32 is formed in the center of the rolling guide shaft 31, and a screw hole 21 is formed in the center of the bearing hole 20. The jig body 2 is overlaid on the upper side of the mounting flange 30 and the rotation guide shaft 31 is formed in the bearing hole. 20 and then the tightening screw 4 is inserted from below into the screw insertion hole 32 of the mounting flange 30 and screwed into the screw hole 21 of the bearing hole 20 to tighten the jig body 2 and the mounting base 3. The screws 4 are connected to each other so as to be rotatable about the Y axis of the NC lathe. Although it is conceivable to directly guide the rotation of the jig body 2 with the tightening screw 4, it is not possible to accurately guide due to rattling of the tightening screw 4. On the other hand, when the rotation of the jig main body 2 is guided by the rotation guide shaft 31, it is possible to perform extremely accurate guidance.

An insertion hole 22 for the touch sensor 6 is formed in the jig body 2, and a thumbscrew 5 is screwed on the upper surface of the jig body 2 to fix the touch sensor 6 inserted in the insertion hole 22. You can do it. Further, the mounting flange 30 of the mounting base 3 is formed with two positioning surfaces 33, 34 parallel to the X axis and the Z axis of the NC lathe, and the jig body 2 has one of the positioning surfaces 33, 34 of the mounting base 3. A positioning piece 23 for positioning the jig body 2 by abutting against it is provided in a protruding manner, and an inclined surface is formed between both positioning surfaces 33, 34 of the mounting flange 30 so that the rotation of the positioning piece 23 is not hindered. .

Next, a usage method will be described. When measuring the work W dimension, the mounting base 3 of the measuring jig 1 is attached to the empty bite holder 70 of the tool rest 7 in advance in the X-axis or Z-axis direction (in this example, the X-axis direction), and the jig is fixed. Insert the touch sensor 6 into the insertion hole 22 of the tool body 2 and fix it with the thumbscrew 5.

When turning is completed and, for example, the outer diameter of the work W is measured, first, the tool rest 7 is rotated to select the touch sensor 6, and the touch sensor 6 is oriented in the X-axis direction. After switching the NC lathe to manual feed, manually feed the tool rest 7 in the X-axis direction to align the tip of the touch sensor 6 with the center position, and reset the X position display of the NC lathe to 0. The turret 7 is returned by a predetermined distance. Next, as shown by an arrow A in FIG. 3, after the tool rest 7 is manually fed in the Z-axis direction to position the touch sensor 6 at a position on the Z-axis where the workpiece W is to be measured, the tool rest 7 is then moved. When is manually fed in the X-axis direction, the touch sensor 6 comes into contact with the surface of the workpiece W, the indicator 60 of the touch sensor 6 lights up, and it can be seen that the contact has been made. The display of the NC lathe displays the outer diameter of that part of the work W relative to the center of the work W. Therefore, if the displayed X position is read, the outer diameter of the work W can be accurately and accurately determined. You can measure without. The outer diameters of other parts can be measured in the same manner.

When the outer diameter of the taper portion W1 of the work W is measured, if the touch sensor 6 is oriented in the X-axis direction, the touch sensor 6 may obliquely contact the taper portion W1 to cause a failure or the like. To be done. In such a case, it is preferable to loosen the tightening screw 4, rotate the jig body 2 with respect to the mounting base 3, and tilt the touch sensor 6 so as to be substantially perpendicular to the taper surface (FIG. 3). Arrow B).

When measuring the length of the work W, for example, the distance between the step end faces, as shown by an arrow C in FIG. 3, the tool rest 7 is manually operated in the Z-axis direction and the X-axis direction to touch the touch sensor 6. To the one end of the work W to reset the Z position display of the NC lathe. Next, after returning the touch sensor 6 on the X-axis by a predetermined distance and separating it from the step, it is manually sent in the Z-axis direction and the X-axis direction to contact the other end surface of the step W of the work W, By reading the Z position display at the time, the dimension between the end faces of the step can be measured accurately and without error. In the same manner, the length of each part of the work W in the Z-axis direction can be measured.

When measuring the inner diameter of the work W, for example, the inner diameter of the ring-shaped work W shown in FIG. 4, the touch sensor 6 is oriented in the Z-axis direction, the center position is set to 0, and the X display is reset. 7 is sent in the X-axis direction and the Z-axis direction to position the touch sensor 6 in the work W, and this is sent again in the return direction in the X-axis direction to bring the touch sensor 6 into contact with the inner peripheral edge of the work W. By reading the display of the X position, the inner diameter of the work W can be measured with reference to the center position of the work W.

It should be noted that it is preferable to reset the display on the NC lathe to display the inner and outer diameters and the length of the work W itself, since there is no measurement error and the measurement work is simple, but of course, resetting is not performed. The inner and outer diameters and length of the work W may be calculated from the display of the NC lathe. For example, when measuring the inner diameter of the work W, the inner diameter may be calculated from the display of the X position and the known outer diameter position of the work W.

When a dial gauge is attached to the jig of this example instead of the touch sensor 6 and the work W is rotated while the stylus of the dial gauge is in contact with the work W, the display of the dial gauge changes. Therefore, the roundness of the outer shape of the work W can be evaluated. Therefore, by using one jig of this example, not only the dimension but also the degree of shape can be measured, that is, in a broad sense.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the jig body 2 and the mounting base 3 are integrally formed, and the jig body 2 is provided with a mounting hole 22 for the touch sensor 6 extending in the X-axis direction and the Z-axis direction of the NC lathe. The touch sensor 6 inserted in the mounting hole 22 can be fixed by the screw 5, and thus, the measuring jig 1 can be manufactured at low cost.

[0023]

[Effect of device]

 As described above, according to the present invention, the size of each part of the work can be measured with the work set on the NC lathe, and no complicated manual work such as a caliper or a micrometer is required, and various work can be performed. Accurate and error-free measurement can be performed without the operator's individual difference at the location, and if reworking is required, turning can be continued without interruption, which is extremely convenient. Moreover, since the bite holder of the NC lathe is standardized, it is possible to measure the dimensions with the work set in any NC lathe by preparing one measuring jig.

[Brief description of drawings]

FIG. 1 is a diagram showing a state (a) of a jig for measuring a workpiece size in an NC lathe according to an embodiment of the present invention as seen obliquely and a state (b) of its essential parts disassembled.

FIG. 2 is a perspective view showing how the jig is attached to a bite holder.

FIG. 3 is a diagram for explaining a method for measuring a work dimension.

FIG. 4 is a diagram for explaining a method for measuring a work dimension.

FIG. 5 is a perspective view showing a jig for measuring a workpiece size in an NC lathe according to another embodiment of the present invention.

[Explanation of symbols]

 1 Measuring jig 2 Jig body 22 Insertion hole (mounting part) 23, 24 Positioning piece 3 Mounting base 33, 34 Positioning surface 4 Tightening screw 5 Thumbscrew 6 Touch sensor 7 Turret 70 Tool holder

Claims (3)

[Scope of utility model registration request] 1. A jig for attaching a touch sensor for measuring a work size to a tool post tool holder of an NC lathe, which is rotatably connected to each other around a Y axis of the NC lathe by a screw member. The tool base and the mounting base are provided so that the mounting base can be mounted on the tool post bite holder with the X-axis feed direction or the Z-axis feed direction of the tool post facing, while the jig body has a touch sensor. Is formed, and the touch sensor attached to the attachment is oriented in the X-axis direction or the Z-axis direction by rotating the jig body around the Y-axis, and the tool rest is in the X-axis direction. Alternatively, the work size can be measured from the display of the feed position of the NC lathe when the touch sensor and the work come into contact with each other by manual operation in the Z-axis direction. Jig. 2. The mounting base has a first positioning surface parallel to a plane formed by the X axis and the Y axis of the NC lathe, and a second positioning surface parallel to a plane formed by the Y axis and the Z axis. The jig body is provided with a positioning piece that can come into contact with the positioning surface of the mounting base, and the jig body is rotated around the Y axis so that the positioning piece comes into contact with the second positioning surface. The jig for workpiece size measurement in an NC lathe according to claim 1, wherein said touch sensor is oriented in the X-axis direction, and said touch sensor is oriented in the Z-axis direction by being brought into contact with the first positioning surface. . 3. A jig for attaching a touch sensor for measuring a work size to a tool post tool holder of an NC lathe, comprising a jig body and an attachment base integrally formed with each other, and the above-mentioned attachment The base is provided so that it can be attached to the tool post bite holder by directing the X-axis feed direction or the Z-axis feed direction of the tool post, while the jig body is attached with a touch sensor extending in the X-axis direction and the Z-axis direction. Two holes are formed, and a screw member capable of fixing the touch sensor inserted in the mounting hole is provided, the touch sensor is mounted in the mounting hole extending in the X-axis direction or the Z-axis direction, and the tool rest is X-axis. The work size in the NC lathe can be measured from the display of the feed position of the NC lathe when the touch sensor and the work come into contact with each other by manual operation in the axial direction or the Z-axis direction. Titration, jig.