JPH02262959A - Dimension determining device of plane grinder - Google Patents

Abstract

PURPOSE:To perform highly accurate measurement high in reliability without being affected by abrasion of a grindstone or thermal displacement of a brinder by fixing a sensor to a slider such that it opposes the placing face of a work and the detected position is positioned on the placing face side by the amounts of finishing dimension of the work from the end face of the slider. CONSTITUTION:The end on the work 4 side of a roller 17 is projected in advance from the grinding face of a grindstone 8 to the work side 4, and at the same time a sensor 23 is positioned so that the space between the end on the work 4 side of the roller 17 and the position detected by the sensor 4 may be the finishing dimension of the work 4. And, in the conditions that the roller 17 is abutted on the processing face 5 of the work 4, the grinding face 9 of a grindstone 8 is applied to the processing face 5 of the work 4 so as to perform grinding. When this grinding advances and the sensor 23 detects the placing face 3, its detection signal finishes the grinding.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a sizing device for a surface grinder.

[Conventional technology]

As a sizing device for measuring the finished dimensions of a workpiece during surface grinding, for example, Japanese Patent Application Laid-Open No. 61-274876
There is something disclosed in the publication No.

This publication discloses that a two-point in-process gauge is used to measure the machined surface of a workpiece and the placement surface of a chuck on which the workpiece is placed.

However, there is no description of what a two-point in-process gauge is, how to place it, and how to use it.

Also, Automation Design Handbook (Supervised by Kato Kato and Shotabe Ozaki, Kogyo Kenkyukai, published March 15, 1973.

A sizing device is shown in P294-P295).

[Problem to be solved by the invention]

However, all of these methods merely show the concept of a sizing device, but cannot be realized in concrete terms.

In view of the above circumstances, an object of the present invention is to provide a sizing device that can be realized with a simple configuration and that can perform highly accurate measurements.

[Means to solve the problem]

Means of the present invention to achieve the above objects.

Description will be made based on FIG. 1 corresponding to the embodiment.

In the figure, 3 is the a side of the chuck. 4 is a workpiece,
It is placed and fixed on the placement surface 3. Reference numeral 5 denotes a machined surface of the workpiece 4, and 6 a grindstone head, which are arranged to face the workpiece 4. 8 is a grindstone fixed to a grindstone shaft rotatably supported by the grindstone head 6, 9 is a grinding surface of the grindstone 8, and 19 is a slider, the main body of which is supported by the single stone head 6 so as to be movable in the cutting direction of the grindstone 8. 15, and a roller 17 rotatably supported by the main body 15. 23 is a sensor,
It is supported by a slider 19.

[For production]

In advance, the end of the roller 17 on the workpiece 4 side is made to protrude from the grinding surface of the grindstone 8 toward the workpiece 4, and the distance between the end of the roller 17 on the workpiece 4 side and the detection position of the sensor 23 is The sensor 23 is positioned so that the finished dimension t of the object 4 is obtained.

Then, with the roller 17 in contact with the machined surface 5 of the workpiece 4, the grinding surface 9 of the grindstone 8 is applied to the machined surface 5 of the workpiece 4 to perform grinding.The grinding progresses, and the sensor 23 is placed on the machined surface 5 of the workpiece 4. When the surface 3 is detected, the grinding is terminated based on the detection signal.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a rotary table. 2 is a chuck, which is fixed to the table 1. 3 is a mounting surface of the chuck 2, and 4 is a workpiece, which is supported by the chuck 2. Reference numeral 5 represents a processing surface of the workpiece 4, and reference numeral 6 represents a grinding wheel head, which are arranged to face the table 1. 7 is a grindstone shaft, which is rotatably supported by the grindstone head 6. 8 is a grindstone, which is fixed to the grindstone shaft 7. 9 is the grinding surface of the whetstone 8.

10 is a sizing device, which has the following configuration.

Reference numeral 11 denotes a frame, which is fixed to the grinding wheel head 6.

12 is a key groove formed in the frame 11.

A stopper 13 is fixed to the lower end of the frame 11. A plate 14 is fixed to the upper end of the frame 11. Reference numeral 15 denotes a main body of the slider, which is supported by the frame 11 so as to be movable in the cutting direction of the grinding wheel 8, and which also has a key 16.
Rotation is regulated. A roller 17 is rotatably supported by the main body 15 via a bearing 18. and 1
The main body 15 and the cola 17 constitute a slider 19. 20
is a pressure adjustment bolt, which is screwed into a screw hole formed in the plate 14. A spring 21 is interposed between the slider 19 and the bolt 2o. 22 is a bracket,
It is fixed to the slider 19.

Reference numeral 23 denotes a non-contact type sensor, and a screw formed on its outer periphery is screwed into a screw hole formed in the bracket 22 and fixed with a nut 24.

With this configuration, as shown in FIG. 2(A), the grinding wheel 8
The sizing device 10 is positioned and fixed so that the roller 17 protrudes from the grinding surface 9 toward the workpiece 4 by a distance g. Also,
The position of the sensor 23 is adjusted so that the detection position of the sensor 23 protrudes from the lower end of the roller 19 toward the chuck 3 by the finished dimension t of the workpiece 4.

Then, the table 1 and the grinding wheel shaft 7 are rotated, and the grinding wheel head 6 is rotated.
When the roller 17 is moved toward the table 1 side, the roller 17 first comes into contact with the processing surface 5 of the workpiece 4, as shown in FIG. 2(B). Then, since the workpiece 4 is rotating due to the rotation of the table 1, the roller 17 also rotates.

Further, when the grindstone head 6 moves toward the table 1, the grinding surface 9 of the grindstone 8 comes into contact with the processing surface 5 of the workpiece 4, and grinding is started, as shown in FIG. 2(C).

As shown in FIG. 2(D), as the grinding progresses and the workpiece 4 becomes thinner, the sensor 23 gradually approaches the chuck 4.

Grinding progresses further, as shown in Figure 2 (E).

When the thickness of the workpiece 4 reaches the finished dimension t, the sensor 23 detects the mounting surface 3 of the chuck 2.

Then, based on the detection signal from the sensor 22, the grinding wheel head 6 stops moving, moves away from the table 1, and finishes the grinding.

In this way, the finished dimension t of the workpiece 4 can be accurately controlled.

Note that the sensor 23 in the above embodiment is not only a non-contact type sensor using light, capacitance, eddy current, ultrasonic wave, etc., but may also be a contact detection type sensor.

Further, the roller 17 provided on the slider 19 rotates in contact with the workpiece 4 so as not to damage the machined surface of the workpiece 4, so it may be spherical. Further, depending on the type of workpiece 4, it may not be provided.

〔Effect of the invention〕

As described above, according to the present invention, the grinding wheel head of a surface grinder is movably supported in the cutting direction of the grinding wheel so as to face the processing surface of the workpiece, and a slider biased to protrude toward the processing surface;
This slider is provided with a sensor that faces the workpiece placement surface and is fixed such that the detection position is located closer to the workpiece placement surface than the tip surface of the slider by the finished dimension of the workpiece. A compact sizing device can be realized with a simple configuration. Furthermore, it has extremely large industrial effects, such as being able to perform highly reliable and highly accurate measurements without being affected by grindstone wear or thermal displacement of the grinder.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a sizing device for a surface grinder according to the present invention, and FIG. 2 is a process diagram showing the operation steps of the sizing device. 3: L placement part, 4: Workpiece, 5: Machining surface, 6: Grinding wheel head, 8
: Grindstone, 9: Grinding surface, 15: Main body, 17: Roller, 1
9 Nislida. 23: Sensor. (A (β) (C) CD)

Claims (1)

[Claims] 1. Attached to the grinding wheel head of a surface grinder so as to be movable in the cutting direction of the grinding wheel so as to face the processing surface of the workpiece, and protruding from the grinding surface of the grinding wheel toward the processing surface of the workpiece. a biased slider, and a sensor fixed to the slider so as to face the workpiece placement surface and to have a detection position located closer to the workpiece placement surface than the tip end of the slider. A sizing device for a surface grinder, characterized in that it is provided with: