JPH0947962A - Dressing device for metal bond grinding wheel and dressing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dressing method for a metal bond grinding wheel wherein a product adhered on the surface of a dressing electrode is reduced as much as possible, or a product adhered on the surface of the dressing electrode is removed, or when a product is adhered, the working surface of the dressing electrode is reversed. SOLUTION: A dressing device for a metal bond grinding wheel is formed in such a manner that a dressing electrode 12 is arranged facing a metal bond grinding wheel 11 attached so as to effect grinding of a work 10 as the grinding stone is rotated and dressing is effected with electrolyte located between the grinding wheel 11 and the electrode 12 during a grinding work. A nozzle 14 for injecting electrolyte to feed electrolyte is arranged in the vicinity of the end part of the electrode 12 forming the advancing side through rotation of the grinding stone 11. A nozzle 15 for washing to inject washing liquid toward the grinding wheel 11 is arranged between the end of the work 10, forming the escape side through rotation, and the end of the electrode 12.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dressing apparatus and a dressing method for dressing a metal bond grindstone by electrolytic action.

[0002]

2. Description of the Related Art As a dressing device for dressing a metal bond grindstone by electrolytic action, Japanese Patent Application Laid-Open No. 5-2 / 1992.
There is one disclosed by Japanese Patent No. 85829. In this publication, the dressing electrode is continuously formed in opposition to the metal bond grindstone, and the facing position of the electrode surface of the dressing electrode facing the metal bond grindstone can be changed during the grinding process. It is designed to be cleaned.

[0003]

In electrolytic dressing grinding in which a dressing electrode is provided so as to face a metal bond grindstone and the metal bond grindstone is rotated to dress the metal bond grindstone during grinding, Processing dust generated between the object and the metal bond grindstone, or the binding material or abrasive grains of the metal bond grindstone, or
The foreign matter generated by the electrolysis of the grindstone coating is caught on the surface of the metal bond grindstone, enters between the metal bond grindstone and the dressing electrode, and adheres to the surface of the dressing electrode as a product. It is required to keep this product as low as possible and to remove the adhering product.

The present invention provides a dressing device for a metal bond grindstone that minimizes the products adhering to the surface of the dressing electrode, or makes it possible to remove the product adhering to the surface of the dressing electrode, or
It is an object of the present invention to provide a dressing method for a metal bond grindstone in which the working surface of the dressing electrode can be switched when the product adheres.

[0005]

To achieve the above object, the invention according to claim 1 is provided with a dressing electrode facing a metal bond grindstone mounted to grind a workpiece while rotating. In a dressing device for a metal bond grindstone that performs dressing by interposing an electrolytic solution between the metal bond grindstone and the dressing electrode during the grinding process, the electrolytic solution near the end of the dressing electrode that is the entry side due to the rotation of the metal bond grindstone. Cleaning for ejecting the cleaning liquid toward the metal bond grindstone between the end of the work piece that forms the escape side by the rotation and the end of the dressing electrode. The invention according to claim 2 is characterized in that a metal bond grindstone and a slide are used instead of the electrolytic solution pouring part in claim 1. It is characterized in that it comprises a sliding member that wipes the deposits of the metal bond wheel in.

According to a third aspect of the present invention, a dressing electrode is provided so as to face the metal bond grindstone, and the metal bond grindstone and the dressing electrode are provided during the grinding process while rotating the metal bond grindstone and pouring the grinding liquid onto the workpiece. In a dressing method for a metal bond grindstone in which an electrolytic solution is interposed between the metal bond grindstone and a dressing electrode along a direction substantially orthogonal to the moving direction of the surface to be dressed by the rotation of the metal bond grindstone Is inserted, and the wire is moved to operate to remove the product. The invention according to claim 4 replaces the wire according to claim 3 with a mesh plate and a metal bond grindstone and dressing. It is characterized in that the product is removed by inserting it into a gap between the electrode and moving the mesh plate.

According to a fifth aspect of the present invention, a dressing electrode is provided so as to face the metal bond grindstone, and the metal bond grindstone and the dressing electrode are provided during the grinding process while rotating the metal bond grindstone and pouring the grinding liquid onto the workpiece. In a dressing method of a metal bond grindstone in which an electrolytic solution is interposed between the metal bond grindstones, a dressing electrode having a grindstone facing surface facing the metal bond grindstone on two front and back surfaces is used, and each grindstone facing surface is a metal bond grindstone. It is characterized in that the moving operation is performed so as to be switched to and opposed to each other.
In place of the dressing electrode in 1), a dressing electrode having an axisymmetric grindstone facing surface facing a metal bond grindstone is used, and the dressing electrode is rotationally moved about the axis.

According to a seventh aspect of the present invention, a dressing electrode is provided so as to face the metal bond grindstone, and the metal bond grindstone and the dressing electrode are provided during the grinding process while rotating the metal bond grindstone and pouring the grinding liquid onto the workpiece. In a dressing method of a metal bond grindstone in which an electrolytic solution is interposed between the dressing electrodes, a dressing electrode made of a flexible strip-shaped film is used as the dressing electrode, and the longitudinal shape of the dressing electrode is covered by the metal bond grindstone. A dressing surface and a guide roller for guiding the movement in the longitudinal direction;
It is characterized in that the dressing electrode is moved and operated.

According to an eighth aspect of the present invention, the flow rate of the grinding fluid flowing between the metal bond grindstone and the dressing electrode is used as a means for determining whether to move the dressing electrode according to the third to seventh aspects. The invention is characterized in that when the flow rate is measured and the flow rate is below a predetermined amount, the operation is carried out.
As a means for determining whether or not to operate the dressing electrode described above, the pressure of the grinding liquid in the vicinity of the end of the dressing electrode that has formed the escape side due to the rotation of the metal bond grindstone is measured, and the pressure becomes a predetermined amount or less. The invention according to claim 10 is characterized in that the metal bonding grindstone and the dressing are used as means for determining whether or not the dressing electrodes according to claims 3 to 7 are to be moved. The electrolysis current between the electrode and the electrode is measured, and when the electrolysis current becomes a predetermined value or less, the moving operation is performed.

[0010]

1 is a view showing an embodiment of a dressing apparatus for a metal bond grindstone according to the invention described in claim 1. In FIG. 1, reference numeral 10 is a workpiece, and 11 is a metal bond grindstone (hereinafter simply referred to as a grindstone) attached to grind the workpiece 10. It should be noted that the grindstone 11 rotates clockwise in each of the following drawings. Reference numeral 12 is a dressing electrode (hereinafter simply referred to as an electrode) provided facing the grindstone 11. Reference numeral 13 is a nozzle for pouring the grinding fluid, which is an end portion A1 of the workpiece 10 on the entry side due to the rotation of the grindstone 11.
In the vicinity, the grinding liquid is poured toward the workpiece 10 during the grinding process. Reference numeral 14 is an electrolytic solution pouring nozzle (electrolytic solution pouring part), which is provided near the end A2 of the electrode 12 which is the entry side due to the above rotation, and is provided between the grindstone 11 and the electrode 12 during grinding. Pour out the electrolyte into. Reference numeral 15 is a cleaning nozzle, which is an end portion B1 of the workpiece 10 and the electrode 1 which is the escape side due to the above rotation.
2, which is provided between the above-mentioned entry side end A2 and the grindstone 11
The cleaning liquid is jetted toward.

While pouring the grinding liquid onto the workpiece 10, the grindstone 11
Is rotated for grinding, while the electrolytic solution is poured out between the grindstone 11 and the electrode 12, and the grindstone 11 is electrolytically dressed. Then, the cleaning liquid is ejected from the cleaning nozzle 15 toward the grindstone 11, processing waste generated between the workpiece 10 and the grindstone 11, or a binding material or abrasive grains of the grindstone 11, or,
The foreign matter from which the grindstone coating has fallen off due to electrolysis is washed away. Therefore, these unnecessary substances hardly adhere to the electrode 12.

FIG. 2 is a diagram showing an embodiment of a dressing device for a metal bond grindstone according to the present invention. In the configuration of FIG. 2, the cleaning nozzle of FIG.
In place of 15, a brush 16 is provided in a similar part to this, and the grindstone 11
Is in sliding contact with. The brush 16 may be appropriately rotated or may be fixed. Also in this configuration, as in the case of FIG. 1, unnecessary substances hardly adhere to the electrode 12.

FIG. 3 is a view showing an embodiment of a method for removing the product attached to the electrode according to the third aspect of the invention.
3A is a front view thereof, and FIG. 3B is a bottom view thereof. In FIG. 3, reference numeral 17 denotes a metal wire which is inserted into the gap between the grindstone 11 and the 12th electrode along a direction substantially orthogonal to the moving direction of the dressing surface (outer periphery) by the rotation of the grindstone 11. In this way, the products attached to the surface of the electrode 12 are removed. Although FIG. 3 shows an example in which one wire is used, a plurality of wires may be used in combination. In that case, for example, the wires having the same length are arranged in parallel with each other with a space therebetween, and the one end and the other end are connected by wires or the like to form a ladder shape. Therefore, since the plurality of wires are simultaneously moved and operated, the product is removed more effectively.

FIG. 4 is a diagram showing an embodiment of a method for removing the product attached to the electrode according to the invention of claim 4,
4A is a front view thereof, and FIG. 4B is a bottom view thereof. In FIG. 4, reference numeral 18 denotes a mesh plate formed by braiding metal wires in a cross shape, which is inserted into the gap between the grindstone 11 and the 12th electrode and moved to dress the grindstone 11. In this way, the products attached to the surface of the electrode 12 are removed.

5A and 5B are views showing an embodiment of a dressing method of a metal bond grindstone according to the invention of claim 5, wherein FIG. 5A is a front view thereof, and FIG. 5B is a bottom view thereof. Is. In FIG. 5, 19 is a dressing electrode, a grindstone
The grindstone facing surfaces facing 11 are provided on the two front and back surfaces symmetrically with each other, and are installed in place of the electrodes 12 in FIGS. 1 to 4. The electrode 19 is rotatable about its axis of symmetry. DVa is a drive device that drives the rotation. When the product adheres to one surface of the electrode 19, the drive device DVa is operated to move the electrode 19, and the other surface is opposed to the grindstone 11. The product on one side is then removed in a timely manner.

6A and 6B are views showing an embodiment of a dressing method for a metal bond grindstone according to the invention of claim 6, wherein FIG. 6A is a front view thereof, and FIG. 6B is a bottom view thereof. Is. In FIG. 6, 20 is a dressing electrode, a grindstone
11 is provided with an axisymmetric grindstone facing surface to face 11 and FIG.
In place of the electrode 19 in FIG. The electrode 20 is rotatable about its axis of symmetry. DVb is a drive device that drives the rotation. When the product adheres to the working surface of the electrode 20, the drive device DVb is operated to activate the electrode.
The 20 is rotationally moved by a predetermined rotation angle so that the working surface of the grindstone 11 is changed to face the grindstone 11. Then, the adhered products are removed in a timely manner. The electrode 20 may be constantly rotated by the driving device DVb.

7A and 7B are views showing an embodiment of a method for dressing a metal bond grindstone according to the invention of claim 7, wherein FIG. 7A is a front view thereof, and FIG. 7B is a sectional view thereof. 7 (c) is an enlarged view of the guide portion. In FIG. 7, reference numeral 21 is a dressing electrode made of a flexible band-shaped endless film. Reference numeral 23 denotes an electrode support, which guides the movement of the electrode 21 in the longitudinal direction to the shape of the dressing surface of the grindstone 11 and guides the movement in the longitudinal direction. And a guide roller 24 for bringing it. The guide portion 23 keeps the distance between the electrode 21 and the grindstone 11 constant by the arcuate groove 23a. DVc is a drive device that drives the movement. When the product adheres to the working surface of the electrode 21, the drive device DVc is operated to move the electrode 21 by a predetermined distance, and the working surface of the grindstone 11 is changed to face the grinding wheel 11. Then, the adhered products are removed in a timely manner. The electrode 21 may be constantly moved by the drive device DVc.

According to the eighth aspect of the present invention, each of the driving devices DVa, DVb, and DVc described above has a respective electrode 1
As a first determination means for moving the 9, 20, 21 or not, the flow rate of the grinding fluid flowing between the grindstone 11 and the electrode 19 or 20 or 21 is measured, and the flow rate becomes equal to or less than a predetermined amount. When it does, move it. Also in FIGS. 3 and 4,
A drive device for moving and operating the wire 17 and the mesh plate 18 may be provided and operated by the same determination means.

In the ninth aspect of the invention, as the second judgment means in each of the drive devices DVa, DVb, DVc, the end B3 of the electrode 19 or 20 or 21 on the escape side due to the rotation of the grindstone 11 or The pressure of the grinding fluid in the vicinity of B4 or B5 is measured, and when the pressure becomes equal to or less than a predetermined amount, it is moved. Further, also in FIGS. 3 and 4, a drive device for moving the wire 17 and the mesh plate 18 may be provided, and the wire 17 and the mesh plate 18 may be operated by the same determination means.

With respect to the invention described in claim 10,
As a third determination means in each of the drive devices DVa, DVb, DVc, an electrolytic current between the grindstone 11 and the electrode 19 or 20 or 21 is measured, and when the electrolytic current becomes a predetermined value or less, a moving operation is performed. To Also in FIGS. 3 and 4,
A drive device for moving and operating the wire 17 and the mesh plate 18 may be provided and operated by the same determination means.

[0021]

According to the first aspect of the present invention, the cleaning liquid is ejected toward the metal bond grindstone before the metal bond grindstone enters the dressing electrode due to its rotation. Not much product adheres to the surface. According to the invention of claim 2, instead of the structure for ejecting the cleaning liquid in claim 1, a sliding contact member for slidingly contacting the metal bond grindstone and wiping off the deposits of the metal bond grindstone is provided. Moreover, not much product is attached to the surface of the dressing electrode.

According to the third aspect of the invention, a wire is inserted into the gap between the metal bond grindstone and the dressing electrode along a direction substantially orthogonal to the moving direction of the dressing surface due to the rotation of the metal bond grindstone, and the wire is inserted. Is moved to perform dressing, so that the product attached to the surface of the dressing electrode is efficiently removed. According to the invention of claim 4, in place of the wire in claim 3, a mesh plate is inserted, and the mesh plate is moved to perform dressing, so that the product adhered to the surface of the dressing electrode is It is efficiently removed in the same manner as above.

According to the fifth aspect of the present invention, the respective facing surfaces of the whetstone of the dressing electrode having the facing surfaces of the whetstone facing the metal bond grindstone are switched to face each other with respect to the metal bond whetstone. Because I tried to make it
When the product adheres to one surface of the dressing electrode, the other surface can be faced to the metal bond grindstone for dressing.

According to the invention of claim 6, instead of the dressing electrode in claim 5, a dressing electrode having an axisymmetric grindstone facing surface facing the metal bond grindstone is rotationally moved about the axis. Therefore, when the product adheres to the working surface of the dressing electrode, the dressing electrode can be rotated and operated to change the working surface of the metal bond grindstone so that the dressing electrode faces the dressing surface.

According to the seventh aspect of the invention, the dressing electrode made of a flexible strip-shaped film is moved and actuated so that the shape of the dressing electrode in the longitudinal direction corresponds to the shape of the dressing surface of the metal bond grindstone. Therefore, when the product adheres to the working surface of the dressing electrode, it becomes possible to change the working surface of the metal bond grindstone so as to face each other and perform dressing.

According to the eighth aspect of the present invention, the measurement result of the flow rate of the grinding fluid between the metal bond grindstone and the dressing electrode is used as the judgment means for moving the dressing electrode according to the third to seventh aspects. Since it is used, it is possible to deal with the fact that the product adheres to the working surface of the dressing electrode. According to the invention of claim 9, claim 3
Since the measurement result of the pressure of the grinding fluid at the portion where the metal bond grindstone escapes from the dressing electrode due to its rotation is used as the determination means for moving the dressing electrode according to claim 7, the dressing electrode is the same as above. It is possible to deal with the fact that the product adheres to the working surface of the.

According to the invention of claim 10, claim 3
Since the measurement result of the electrolytic current is used as the determination means for moving the dressing electrode according to the seventh aspect, it is possible to cope with the adhesion of the product to the working surface of the dressing electrode as in the above.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a dressing device for a metal bond grindstone according to the invention of claim 1.

FIG. 2 is a diagram showing an embodiment of a dressing device for a metal bond grindstone according to the invention of claim 2;

FIG. 3 is a diagram showing an embodiment of a method for removing a product attached to an electrode according to the invention of claim 3.

FIG. 4 is a diagram showing an embodiment of a method for removing a product attached to an electrode according to the invention of claim 4.

FIG. 5 is a diagram showing an embodiment of a dressing method for a metal bond grindstone according to the invention of claim 5;

FIG. 6 is a diagram showing an embodiment of a dressing method for a metal bond grindstone according to the invention of claim 6;

FIG. 7 is a diagram showing an embodiment of a method for dressing a metal bond grindstone according to the invention of claim 7;

[Explanation of symbols] 10 Work piece 11 Metal bond grindstone 12, 19, 20, 21 Dressing electrode 13 Grinding liquid pouring nozzle 14 Electrolytic liquid pouring nozzle (electrolytic liquid pouring part) 15 Cleaning nozzle 16 Brush ( Sliding contact member) 17 wire 18 mesh plate 22 electrode support 23 guide 23a groove 24 guide roller DVa, DVb, DVc drive device

Claims (10)

[Claims] 1. A dressing electrode is provided facing a metal bond grindstone mounted to grind a workpiece while rotating, and an electrolytic solution is interposed between the metal bond grindstone and the dressing electrode during grinding. In dressing device of metal bond grindstone
A dressing electrode for supplying the electrolytic solution is provided in the vicinity of the end of the dressing electrode on the entry side due to the rotation of the metal bond grindstone, and the end of the workpiece and the dressing on the exit side due to the rotation are dressed. A dressing device for a metal bond grindstone, comprising a cleaning nozzle for ejecting a cleaning liquid toward the metal bond grindstone between the end of the electrode. 2. A dressing electrode is provided facing a metal bond grindstone attached to grind a workpiece while rotating, and an electrolytic solution is interposed between the metal bond grindstone and the dressing electrode during grinding. In dressing device of metal bond grindstone
A dressing electrode for supplying the electrolytic solution is provided in the vicinity of the end of the dressing electrode on the entry side due to the rotation of the metal bond grindstone, and the end of the workpiece and the dressing on the exit side due to the rotation are dressed. A dressing device for a metal bond grindstone, comprising: a sliding contact member that slidably contacts the metal bond grindstone with the end portion of the electrode to wipe off a deposit of the metal bond grindstone. 3. A dressing electrode is provided so as to face the metal bond grindstone, and the electrolytic solution is provided between the metal bond grindstone and the dressing electrode during grinding while rotating the metal bond grindstone to pour the grinding liquid onto the workpiece. In a dressing method of a metal bond grindstone for interposing and dressing, a wire is inserted into a gap between a metal bond grindstone and a dressing electrode along a direction substantially orthogonal to a moving direction of a surface to be dressed due to rotation of the metal bond grindstone, and the wire A dressing method for a metal bond grindstone, characterized in that the product adhered to the electrode is removed by moving the electrode. 4. A dressing electrode is provided so as to face the metal bond grindstone, and an electrolytic solution is applied between the metal bond grindstone and the dressing electrode during the grinding process while rotating the metal bond grindstone to pour the grinding liquid onto the workpiece. In a dressing method of a metal bond grindstone for interposing and dressing, a mesh plate is inserted into a gap between the metal bond grindstone and a dressing electrode, and the mesh plate is moved to remove a product attached to the electrode. Dressing method for metal bond grindstone. 5. A dressing electrode is provided so as to face the metal bond grindstone, and the electrolytic solution is applied between the metal bond grindstone and the dressing electrode during the grinding process while rotating the metal bond grindstone to pour the grinding liquid onto the workpiece. In the dressing method of a metal bond grindstone for interposing and dressing, as the dressing electrode, a dressing electrode having a grindstone facing surface facing the metal bond grindstone on two front and back surfaces is used, and each grindstone facing surface is a metal bond grindstone. A dressing method for a metal-bonded grindstone, which is characterized in that the metal-bonded grindstones are moved so as to be opposed to each other. 6. A dressing electrode is provided so as to face the metal bond grindstone, and an electrolytic solution is applied between the metal bond grindstone and the dressing electrode during grinding while rotating the metal bond grindstone to pour the grinding liquid onto the workpiece. In the dressing method of a metal bond grindstone with intervening dressing, a dressing electrode having an axisymmetric grindstone facing surface facing the metal bond grindstone is used as the dressing electrode, and the dressing electrode is rotationally moved about the axis. A dressing method for a metal bond grindstone, which comprises: 7. A dressing electrode is provided so as to face the metal bond grindstone, and an electrolytic solution is applied between the metal bond grindstone and the dressing electrode during grinding while pouring the grinding liquid onto the workpiece by rotating the metal bond grindstone. In the dressing method of a metal bond grindstone with intervening dressing, a dressing electrode made of a flexible strip-shaped film is used as the dressing electrode, and the shape of the dressing electrode in the longitudinal direction corresponds to the shape of the dressing surface of the metal bond grindstone. A dressing method for a metal bond grindstone, comprising: a guide portion that guides the movement in the longitudinal direction; and a guide roller that bridges the dressing electrode and causes the movement, and actuates the dressing electrode. 8. A flow rate of a grinding fluid flowing between a metal bond grindstone and a dressing electrode is measured as a means for determining whether or not to move the dressing electrode, and when the flow rate falls below a predetermined amount, the moving operation is performed. The dressing method for a metal bond grindstone according to claim 3, wherein the dressing method is performed. 9. The pressure of the grinding fluid in the vicinity of the end of the dressing electrode which is on the escape side due to the rotation of the metal bond grindstone is measured as a means for determining whether or not the dressing electrode is to be moved, and the pressure is a predetermined amount. 8. The dressing method for a metal bond grindstone according to claim 3, wherein the moving operation is performed when the following conditions occur. 10. A method for determining whether or not to move a dressing electrode is to measure an electrolytic current between a metal bond grindstone and a dressing electrode, and to move the electrolytic current when the electrolytic current falls below a predetermined value. The dressing method for a metal bond grindstone according to claim 3, wherein