JPS6274571A - Method of dressing grindstone and device therefor - Google Patents

Abstract

PURPOSE:To greatly shorten the time required for a grindstone forming process, by applying a jet stream of high pressure fluid mixed with polishing particles for the fabrication of the grindstone. CONSTITUTION:High pressure fluid generated from a high pressure pump 4 is jetted from a water nozzle in a nozzle head 1 through a high pressure pipe line 10, and is mixed with a polishing material which has been fed from a polishing material supply device 5 through a pipe line 11, in a mixing chamber to form a mixed jet stream 9 of water and the polishing material which is directed tangentially of a grinding wheel 2 on rotation. At this time the nozzle head 1 is moved controlled by a controller in accordance with a desired shape of the grinding wheel 2 so that the mixed jet stream 9 is moved along the desired shape of the grinding wheel 2, thereby it is possible to rapidly form the contour of a grinding wheel 2 into a desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a novel method for dressing a grinding wheel and a dressing device for carrying out the dressing method, and more specifically, to This invention relates to a dressing method performed by applying this to a grindstone and its H positioning.

[Technical Background of the Invention] With the progress of mass production of various mechanical parts, etc., in recent years, in order to stabilize and improve the quality of mass-produced products, reduce manufacturing costs, and other reasons,
There is a growing tendency to use full-sized grindstones as grinding wheels.

A grinding wheel used for grinding, especially a full-type grinding wheel or a similar one, is formed into a contour shape that is complementary to the finished shape of the workpiece to be processed by applying the grinding wheel, and the grinding wheel is It is used for work.

The shaping process has conventionally been carried out using a tool having a shape complementary to that of the grinding wheel, such as a full block dresser or a full rotary dresser.

On the other hand, the water jet machining method, which processes relatively soft materials by applying a high-pressure fluid jet, is being effectively used in certain fields, and while taking advantage of the various advantages of the water jet machining method, it is also possible to process even harder materials. A machining method has been attempted in which abrasive particles are mixed into a high-pressure fluid jet and then injected into the machining process. This method involves injecting a highly pressurized fluid, more specifically water or water mixed with various purpose additives, from an ultra-fine nozzle with a diameter of, for example, 0.1 to 1.0 mm. The workpiece is machined by mixing abrasive particles into a jetted fluid and causing the abrasive particles to collide with the fluid at high speed against the workpiece.

Regarding a nozzle device that can be applied to such a processing method, the applicant of the present application has already disclosed the technology in Japanese Utility Model Application Publication No. 3154.

Therefore, in the present invention, the abrasive particle-mixed high-pressure fluid injection processing method is applied to the molding process of a grinding wheel, and the process can be carried out extremely effectively.

[Objective and Summary of the Invention] The present invention aims to shorten the time required for forming a grindstone by applying a jet of high-pressure fluid mixed with an abrasive to the forming process of the grindstone.

In order to achieve the above object, the present invention applies an abrasive-containing high-pressure fluid jet that is injected to the whetstone in a tangential direction to the rotation of the whetstone while rotating the whetstone, and the abrasive-containing high-pressure fluid jet is The grindstone is dressed by moving it.

The device for this purpose includes a grindstone shaft connected to a rotation drive means, a grindstone fixing means disposed at a desired position of the grindstone shaft, and an injection port for injecting an abrasive-containing fluid tangentially to the grindstone shaft. an open nozzle head; a high-pressure fluid generator connected to the nozzle head by high-pressure piping means; an abrasive supply device connected to the nozzle head by piping means; a nozzle head moving device including a means for locking the nozzle head; a control device for controlling the nozzle head moving device; The present invention provides a grindstone dressing device comprising a receiving tank for receiving the grindstone.

[Embodiments of the Invention] The present invention will be explained in more detail below based on preferred embodiments shown in the drawings.

In the figure, l is a nozzle head, 2 is a grinding wheel, 3 is a grinding wheel shaft, 4 is a high pressure fluid generator, which is a high pressure pump,
5 is an abrasive supply device, 6 is a nozzle/rad moving device, 7
is a control device, and 8 is a receiving tank. The nozzle head 1 and the high-pressure pump 4 are connected through a high-pressure pipe lO1, preferably a flexible high-pressure pipe, and the high-pressure fluid generated by the high-pressure pump 4 is supplied to the nozzle head 1 through the high-pressure pipe 10.

Further, the nozzle head 1 and the abrasive supply device 5 are connected to a pipe II.
, preferably connected by a flexible pipe, and supplies the abrasive stored in the abrasive supply device Ft5 to the nozzle head l through the pipe 11. The grinding wheel shaft 3 is connected to a motor 12, which is a rotational driving means, which is locked to the receiving tank 8, and is locked to the receiving tank 8 by suitable bearings 13, 13', etc., and the grinding wheel 2 A fixing means is provided for fixing the. The nozzle head 1 is locked to the nozzle head moving device 6 by a locking IL member 15. The receiving tank 8 may be provided with a fluid scattering prevention cover 16 and an abrasive discharge device 14 as appropriate.

Now, in the illustrated apparatus, the grinding wheel 2 must first be attached to the grinding wheel shaft 3. By fixing the grinding wheel 2 to the grinding wheel 2, the grinding wheel 2 rotates integrally with the grinding wheel 3 which is rotationally driven by the motor 12. Various configurations are possible as a fixing means for fixing the grinding wheel 2 to the grinding wheel shaft 3.

For example, as a simple and inexpensive configuration that has poor workability, the fourth
As shown in the figure, a flange 21 is fixed at a predetermined position on the whetstone shaft 3, a presser flange 22 is loosely fitted to the whetstone shaft 3 facing the flange 21, and a screw 23 is formed on the whetstone shaft 3.
A nut 24 is engaged with the flange 21.
The grinding wheel 2 is held between the presser flange 22 and the nut 2.
4 to fix the grinding wheel shaft 3 and the grinding wheel 2. To attach and detach the grinding wheel 2, the nut 24 is removed from the grinding wheel shaft 3, and the presser flange 22 is also removed from the grinding wheel shaft 3, and then the grinding wheel 2 is attached to and detached from the grinding wheel shaft 3.

Furthermore, in order to automate the attachment and detachment of the grinding wheel 2, it is necessary to adopt a configuration suitable for automation as shown in FIG. A pressing shaft 3' is disposed on the same axis as the pressing shaft 3', and the flange 211N of the pressing shaft 3' is formed into a conical shape so that it can enter the center hole 25 of the grinding wheel 2.
A presser flange 22 is provided at a position opposite to the flange 21 of
to be restrained oppressively. The pressing shaft 3' is rotatably supported by a support member 26, the support member 26 is fixed to a propelling means, for example, a fluid pressure cylinder 27, and the fluid pressure cylinder 27 is fixed to the receiving tank 8. When the whetstone shaft 3 rotates, the pressing shaft 3' presses the center of the whetstone shaft 3 and the flange 21
The grinding wheel 2 held by the presser flange 22 rotates integrally with the grinding wheel shaft 3. In this way, the grinding wheel shaft 3
The grinding wheel 2 attached to the
Rotationally driven through.

On the other hand, regarding the nozzle head l, its structure is as disclosed in detail in Japanese Utility Model Application No. 6-0-36154, and an example of the structure is shown in FIG. The high-pressure water generated by the high-pressure pump 4 passes through the high-pressure pipe 10 and is ejected from the water nozzle 17 of the nozzle head 1, and is mixed with the abrasive material supplied from the abrasive material supply device 5 through the pipe 11 in the mixing chamber 19. Mixing nozzle 2 as a mixed jet 9 of and abrasive
0 b) is injected at high speed. The mixed jet 9 is applied in the tangential direction of the grinding wheel 2 while rotating the grinding wheel 2, as shown in FIG. 7, to shape the outer shape of the grinding wheel 2.

In order to process the grinding wheel 2 into a desired shape, it is necessary to move the mixed jet 9 applied to the grinding wheel 2 along the shape.

That is, the nozzle head 1 is moved according to the desired shape, and various conventionally known means can be effectively used for the moving device 6 and its control device 7 for moving the nozzle head 1. For example, an orthogonal moving device and a numerically controlled control device, or a commercially available transfer device called a robot and its control device, etc., can all be effectively used. The nozzle head l is attached to the moving device 6 by the locking member 15.
It moves together with the moving device 6 which is controlled by the control device 7 and moves along the desired shape while ejecting the mixed jet 9.

The mixed jet stream 9 injected from the nozzle head 1 collides with the outer periphery of the grinding wheel 2 at high speed and gouges out the grinding wheel 2. Grinding wheel 2
By continuously rotating the wafer, it is possible to process the entire outer periphery. The mixed jet 9 that collides with the grinding wheel 2 and scoops out the outer periphery of the grinding wheel 2 travels straight as it is and is projected into the receiving tank 8 provided downstream. It is effective to fill the receiving tank 8 with water. In this way, the mixed jet 9 projected into the receiving tank 8 will be projected toward the water, and the projected water and abrasive material can be effectively captured in the water without scattering to the surroundings. It is.

The abrasives projected into the water sink to the bottom of the water due to gravity, and are discharged by an abrasive discharge device 14 installed at the bottom of the receiving tank 8, where they are classified and sorted for disposal or reuse depending on the type of abrasive. served.

Another usage mode is that when forming with a conventional dresser, etc., the time required for the initial forming process and the wear of the dresser are large, so the initial forming process, so-called rough processing, is performed using the processing method of the present invention, and then finishing processing is performed. It is effective to improve the accuracy by processing using conventional methods.

[Effect of the invention] .

As disclosed above in detail, according to the present invention,
By simply controlling the movement of the nozzle head using a control device, it can respond flexibly and quickly to any shape, which greatly reduces the time required for grindstone forming, and also eliminates shape changes due to wear unlike conventional dressers. This has the effect of allowing a desired shape to be obtained over a long period of time.

[Brief explanation of drawings]

FIG. 1 is an external view showing a preferred embodiment of the device according to the present invention, FIG. 2 is a view showing the shape of the grinding wheel, FIG. 3 is an enlarged view of the main part of FIG. 1, FIG. 4 is an enlarged view of the engaging part of the grinding wheel, FIG. 5 is a diagram showing another aspect of the engaging part of the grinding wheel, and FIG. 6 is a longitudinal side view showing an example of the nozzle head. FIG. 7 is a diagram showing a processing state according to the present invention. l: Nozzle head 2: M stone wheel 3: Grinding wheel shaft 4: Ultra-high pressure pump 5: Abrasive material supply bag a 6: Transfer device 7: Control device 8: Receiving tank lO: High pressure piping 11: Piping 12: Motor 15: Section Stopping member patent applicant Sugitsu Machine Co., Ltd. Fig. 2 (d) (b) Fig. 3 Fig. 4

Claims (2)

[Claims] (1) While the grindstone is being rotated, a jet of high-pressure fluid containing an abrasive is applied to the grindstone in a direction tangential to the rotation of the grindstone, and the jet of high-pressure fluid containing the abrasive is moved. How to dress the whetstone. (2) A grindstone shaft connected to a rotational drive means, a grindstone fixing means disposed at a desired position of the grindstone shaft, and an injection port opened to inject an abrasive-containing fluid tangentially to the grindstone shaft. a nozzle head; a high-pressure fluid generator connected to the nozzle head by high-pressure piping means; an abrasive supply device connected to the nozzle head by piping means; and configured to move the nozzle head; a nozzle head moving device including a locking means; a control device for controlling the nozzle head moving device; and a receiving tank for receiving the abrasive-containing high-pressure fluid downstream of the nozzle head in a jetting direction of the abrasive-containing high-pressure fluid. A grindstone dressing device comprising: