JPH03270876A - Manufacture of electrodeposition grinding element - Google Patents

Abstract

PURPOSE:To make uniform the distribution density of abrasive grains in an electrodeposition grinding element by applying electroless plating to the abrasive grains provisionally fixed surface while the laser beam irradiation area on this provisional fixed surface is displaced appropriately, thus forming a regularly performed plating layer, allowing a core to hold the abrasive grains firmly, performing thereupon a dressing process, and allowing the abrasive grains to slip off and be removed from the laser beam non-irradiated area. CONSTITUTION:Plating is applied to a core of a grinding element 21 under the plating liquid where abrasive grains 23, 23' are floating, and a provisionally fixed plating layer 24 is formed, and thereby the abrasive grains are held provisionally in the core to form an abrasive grains provisional fixed surface. Then this surface of the core 21 with abrasive grains fixed is irradiated pulsedly with laser beam by a laser 14 at certain intervals. Further the plating is applied to the abrasive grains provisional fixed surface while themlaser beam irradiated area of the surface is varied appropriately, and a regularly performed plating layer 25 is yielded. Thereby the abrasive grains 23, 23' are retained by the core 21 firmly, followed by a dressing process which causes slipping-off and removal of the abrasive grains 23' from the laser beam irradiated area.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an electrodeposited grindstone used in machine tools such as grinders.

[Prior art] Electroplated grindstones have abrasive grains distributed in only one layer on the grinding wheel surface, and the distribution density of abrasive grains must not be too low in terms of grinding efficiency, but if it is too high, the grinding resistance will increase. It is too large and inappropriate. Therefore, in the production of electrodeposited grindstones, the distribution density of abrasive grains is controlled.

In a conventional method for manufacturing an electrodeposited grindstone, the distribution density of abrasive grains is controlled using a masking material.

The grinding wheel surface of the grinding wheel core is masked with a seed, that is, a masking material, which has micropores distributed in accordance with the desired distribution density of the abrasive grains, and only the abrasive grains that have entered the micropores are electrodeposited onto the grinding wheel core.

[Problem to be solved by the invention]

As in the manufacturing method of electroplated grinding wheels by conventional technology,
When the distribution density of abrasive grains is controlled using masking material,
On the grinding wheel surface, the distribution density of the abrasive grains becomes a desired density over the entire surface.

However, it is difficult to process the masking material to make the size and distribution of the micropores more fine and uniform than possible, that is, to process a fine masking pattern. Therefore, the local distribution of micropores in the masking material is uneven, and the number of abrasive grains that enter one micropore increases, resulting in a partially uneven distribution density of abrasive grains on the grinding wheel surface.

[Means to solve the problem]

The method for producing an electrodeposited grindstone according to the present invention involves plating the grindstone core in a plating solution in which abrasive grains are suspended, and forming a temporary plating layer to temporarily hold the abrasive grains on the grindstone core. There is an abrasive grain tacking process to form a tacking surface, and then a laser beam is irradiated in pulses at an appropriate period to the abrasive grain tacking surface of the grindstone core to which the abrasive grains are tacking, and the abrasive grain tacking surface is Plating is applied to the temporary attachment surface of the abrasive grains while appropriately displacing the laser beam irradiation area to form an actual plating layer to fully retain the abrasive grains on the grinding wheel core, and then dressing is applied to prevent laser beam irradiation. This process consists of an abrasive grain main process in which the abrasive grains in the area are removed.

Furthermore, if the grain size of the abrasive grains is minute, the abrasive grain temporary application process and the abrasive grain main process described above may be omitted, and the plating in the above abrasive grain main process may be performed using a plating solution. Another method is to disperse abrasive grains into the plating solution, stir the plating solution, and suspend the abrasive grains in the plating solution.

[For production]

In the abrasive grain main process, when laser light is irradiated in pulses at an appropriate period and the laser light irradiation area on the abrasive grain tacking surface is appropriately displaced, the laser light irradiation area is When a suitable scanning pattern is drawn on the surface, the area irradiated with the laser beam is heated, and electroless plating is promoted in the area irradiated with the laser beam. Therefore, the intrinsic plating layer in the irradiation area corresponding to the scanning pattern becomes much thicker than the intrinsic plating layer in other areas. Therefore, when the actual plating layer in the area irradiated with the laser beam reaches a sufficient thickness for proper attachment, the thickness of the actual plating layer in other areas is insufficient to hold the abrasive grains. be.

When dressing a grindstone that has been subjected to abrasive grain correction in such a state, only the abrasive grains in the non-laser beam irradiated area where the original plating layer is thin and the abrasive grain retention strength is insufficient are removed, resulting in the above-mentioned An electrodeposited grindstone is obtained in which abrasive grains are distributed only in the irradiation area according to the scanning pattern.

〔Example〕

An embodiment of this invention will be described with reference to the drawings.

The production of electrodeposited grindstones includes an abrasive grain temporary attachment process and a subsequent abrasive grain main process.

In the abrasive grain tacking process, first, the appropriately formed whetstone core 21 is subjected to pretreatment such as degreasing, and base plating is applied to an area of the whetstone core 21 corresponding to the whetstone surface to form a metal plating base layer 22.

Next, the abrasive grains 23, 23... are sprinkled into the plating solution in the plating tank and the plating solution is stirred to suspend the abrasive grains in the plating solution. The grindstone core 21 coated with the plating base layer 22 is immersed to perform electroplating or electroless plating to a plating thickness of 4 to 6 μm. Then, the abrasive grains are temporarily attached to the surface of the metal plating base layer 22 of the grindstone core with the temporary plating layer 24. Then, the grindstone core 21 is taken out from the plating tank and washed with water to wash away excess abrasive grains that are not temporarily attached.

The next abrasive grain processing step is carried out in an abrasive water applicator as shown in FIG.

The abrasive water applying device has an X-axis table 3 slidably placed on an X-axis direction guide 2 provided on a base 1, and a Y-axis direction guide 4 provided on the X-axis table 3. Y
An axis table 5 is slidably mounted. and,
The XIdI line table 3 is displaced in the X-axis direction by a servo motor 6 via a feed screw mechanism #I7, and the Y-axis table 5 is displaced in the Y-axis direction by a servo motor 8 via a feed screw mechanism (not shown). It is supposed to be done.

A coating tank 10 for electroless plating is placed on the YIliI wire table 5. A support means (not shown) for rotatably supporting the cylindrical grindstone core 21 around an axis in the Y-axis direction is provided in the plating bath 10, and a grindstone rotation motor provided on the plating bath 10 is provided. 11 through a belt/pulley mechanism 12.

On one side wall of the plating tank 10 facing in the X-axis direction, a grindstone core 21 is mounted when supported by a support means in the plating tank 10.
In a region facing the outer peripheral surface of the plating tank 10, a part of the wall facing the direction of the X1111 line is a transparent window 13 made of glass or the like through which the laser used can pass. Then, an angle adjusting mirror 15 and a lens 16 are connected to the argon ion laser 14 provided on the fixed side of the base 1 etc.
The laser beam projected through the transparent window 13 is irradiated onto the outer peripheral surface of the grindstone core 21 in the plating tank 10 in the normal direction.

Servo motor 6, servo motor 8, grindstone rotation motor 1
1 and the argon ion laser 14 are each connected to and controlled by a microcomputer 17.

The abrasive grain main process performed in the above abrasive grain device is as follows:
Grinding wheel core 21 with abrasive grains temporarily attached to the support means in the plating tank 10
The grindstone core 21 to which abrasive grains have been temporarily attached is immersed in the plating solution filled in the plating tank 10. Then, electroless plating is further performed on the temporary plating layer 24 of the grinding wheel core 21 to form the main plating layer 25, and as a result, the temporarily applied abrasive grains 23 have a predetermined thickness. It is fully fixed to the grindstone core 21 by the plating layer 25 formed by electroless plating.

In the formation of the above-mentioned plating layer 25, that is, in electroless plating, the argon ion laser 14 is operated under the control of the microcomputer 17, and the laser pulse light of a suitable variable period is applied to the angle adjustment mirror 15 and the lens 16. The light is transmitted through the lens transparent window 13 and irradiated onto the outer peripheral surface of the grindstone core 21, and the servo motor 6.8 and the grindstone rotation motor 11 are driven at appropriate speeds under the control of the microcomputer 17. .

Then, the X-axis table 3 is displaced to an appropriate position by the feed screw mechanism 7, and the outer peripheral surface of the grindstone core 21 is.

The Y-axis table 5 is set at an appropriate distance to the lens 16.
is fed by the feed screw mechanism 9 at an appropriate speed, and the grindstone core 21 is rotated at an appropriate low speed via the belt/pulley mechanism 12.

As a result, an irradiation spot of the pulsed laser beam whose size corresponds to the distance between the outer peripheral surface of the grindstone core 21 and the lens I6 scans the outer peripheral surface of the grindstone core 21. The scanning pattern is determined by the feed speed of the Y-axis table 5, the rotation speed of the grindstone core 21, and the irradiation period of the pulsed laser beam as shown in FIG.
Various changes can be made as shown in (d).

By changing the adhesion pattern of the abrasive grains 23 in this manner, the degree of concentration of the abrasive grains 23 and the sharpness of the grindstone can be changed.

Incidentally, the area irradiated with the laser beam is heated, and electroless plating is promoted in the area irradiated with the laser beam.

Therefore, the actual plating layer 25 in the irradiation area corresponding to the scanning pattern of the irradiation spot becomes much thicker than the actual plating layer 25 in other areas. Therefore, even when the actual plating layer 25 in the laser beam irradiation area reaches a thickness sufficient for actual attachment, the thickness of the actual attachment plating layer 25 in other areas is insufficient to hold the abrasive grains 23. is insufficient.

The abrasive-treated abrasive stone in such a state is dressed with an alumina or silicon carbide stick.

Then, only the abrasive grains 23' in the area not irradiated with the laser spot light, where the thickness of the plated layer 25 with the book is thin and the abrasive retention force is insufficient, are removed, and the abrasive grains 23' are only removed in the irradiated area according to the above-mentioned scanning pattern. An electrodeposited grindstone in which abrasive grains 23 are distributed is obtained (FIG. 2).

If the particle size of the abrasive grains is minute, the abrasive grain tacking process of the above abrasive grain tacking process and abrasive grain main process is omitted, and the abrasive grains are sprinkled on the electroless plating solution. There is also a method in which the abrasive grains are suspended in the plating solution by stirring, and then the electroless plating of the abrasive grain main process described above is performed in the plating solution in which the abrasive grains are suspended.

[Effects of the Invention] According to the method for manufacturing an electrodeposited grindstone of the present invention, the distribution density of the abrasive grains of the electrodeposition grindstone can be made to a desired size, and the density can be made uniform not only over the entire surface but also partially. can be easily done.

Furthermore, it is also possible to make the distribution state draw a desired pattern6.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an apparatus for carrying out the abrasive grain process of the method for producing an electroplated grindstone in an embodiment of the present invention, and FIG. FIG. 3, a partial cross-sectional view of the grindstone, is a schematic diagram of a scanning pattern of an irradiation spot of pulsed laser light in an embodiment of the present invention.

Claims (2)

[Claims] (1) Plating the grinding wheel core in a plating solution in which the abrasive grains are suspended, forming a temporary plating layer to temporarily hold the abrasive grains on the grinding wheel core to form an abrasive grain temporary adhesion surface, and then The abrasive grain tacking surface of the grinding wheel core to which the abrasive grains have been tacked is irradiated with laser light in pulses at an appropriate period, and the abrasive grain tacking surface is irradiated with the abrasive grain tacking surface while appropriately displacing the laser beam irradiation area of the abrasive grain tacking surface. This is an electroplated grindstone in which the abrasive grains are fully retained in the grinding wheel core by applying electroless plating to form a plating layer, and then dressing is applied to remove the abrasive grains from areas not irradiated with the laser beam. Production method (2) The grinding wheel surface of the grinding wheel core is irradiated with laser light in pulses at appropriate intervals, and the grinding wheel core is electrolessly irradiated in a plating solution in which abrasive grains are suspended while appropriately displacing the laser beam irradiation area on the grinding wheel surface. A method for producing an electroplated whetstone, in which the abrasive grains are retained in the whetstone core by plating and forming a plating layer, and the abrasive grains in areas not irradiated with laser light are removed by dressing.