JPH0635110B2 - Electrolytic dressing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electrolytic dressing device that performs dressing (dressing) on a metal bond grindstone for grinding by utilizing an electrolytic action.

(Prior art) Generally, when grinding is continued, the abrasive grains gradually become crushed, and some of the chips of the work material adhere to the surface of the grindstone, causing clogging, which slows the sharpness of the grindstone. As a result, the grinding efficiency is lowered and adverse effects such as "warping" and "burning" to the work material are brought about, so that it is necessary to interrupt the temporary grinding process and redress the dressing.

In particular, in the case of a metal bond grindstone in which blocky abrasive grains having small friability are bonded with a high-strength bond having no pores, the "self-developing blade" action cannot be expected, and the above phenomenon occurs early.

As a countermeasure, an electrolytic dressing method by electrolysis utilizing the conductivity of a metal bond grindstone has been studied in recent years, and the effectiveness of the dressing for the metal bond grindstone has been evaluated and is being put to practical use.

(Problems to be Solved by the Invention) However, conventionally, as shown in FIG.
In the grinding process using the outer peripheral portion of the electrode, the electrode 2 for electrolytic dressing is fixed to the spindle of the grinding machine, the table, or the like, so that the metal bond grindstone 1 is applied to the work surface 3
After grinding a and 3b, the work and the electrode 2 interfere with each other immediately before moving to the work surface 3c, which adversely affects the work, the metal bond grindstone, and the grinding machine.

For this reason, the grinding process cannot be continued, and after grinding one work surface 3b, the grinding process must be temporarily interrupted. To grind another work surface 3c, the fixed electrode 2 is used. It was necessary to move and fix the workpiece to a position where it did not interfere with the work surface 3c and restart the grinding.

Further, since it is impossible to grind all the work surfaces 3a, 3b, 3c without human intervention, continuous grinding cannot be performed, which is one of the bottleneck to unmanning the grinding. .

The present invention has been made to solve such a problem, and its purpose is to enable electrolytic dressing without interruption of the grinding process, and continue the grinding process while keeping the sharpness of the metal bond grindstone good. An object of the present invention is to provide an electrolytic dressing device that can be used.

(Means for Solving the Problems) In order to achieve the above object, the present invention performs dressing by a electrolytic action using a grindstone in which grinding grains are bonded by a metal bond, and an electrode provided opposite to the grindstone. In the device, the electrode is attached by an electrode holder so as to be rotatable around a rotation axis of the grindstone independently of the grindstone, and the electrode holder has a sliding member that comes into contact with a surface to be processed during grinding. A grinding liquid supply unit is provided between the grindstone and the electrode to supply the grinding liquid.

(Operation) According to the present invention, the electrode is rotatably attached around the rotational axis of the grindstone independently of the rotational axis of the grindstone, and the sliding member is attached to the electrode holder. The electrode moves along with the electrode holder in the same direction as the grindstone moves, but because the sliding member moves along the work surface while contacting the work surface under the force of the wheel rotation, the electrode and the work surface Enables smooth grinding without interference.

In addition, the grinding fluid supply unit provided in the electrode holder ensures that the grinding fluid is stably supplied between the grindstone and the electrode regardless of the position of the electrode, so that the sharpness of the grindstone is always maintained. You can

(Examples) Hereinafter, preferred examples of the present invention will be described with reference to the drawings.

1 (a) and 1 (b) show a schematic configuration of an electrolytic dressing apparatus according to the present invention.

A characteristic of the present invention is a device for dressing a grindstone in which grinding grains are bonded by a metal bond by electrolytically using an electrode provided opposite to the grindstone, the electrode being provided by an electrode holder. A sliding member that is attached so as to be rotatable independently of the grindstone around the rotation axis of the grindstone, and that the electrode holder is in contact with a surface to be processed during grinding,
That is, a grinding liquid supply unit that supplies the grinding liquid is provided between the grindstone and the electrode.

In this embodiment, as shown in FIGS. 1 (a) and 1 (b), the electrolytic dressing apparatus combines abrasive grains such as diamond by a metal bond to form a metal bond grindstone 1 and an electrode 2.
Having an electrode holder 5 and an electrode fixture 6 for attaching
The metal bond grindstone 1 is attached to a main shaft of a grinding machine via a grindstone shaft 4. The electrode 2 is rotatably attached to the electrode attachment hole of the electrode holder 5 provided so as to face the metal bond grindstone 1 independently of the magnet 1 by using the electrode fixture 6.

The electrode holder 5 is made of an insulator in order to avoid a short circuit in the electrolysis electric circuit, and is rotatably attached to the grindstone shaft 4 via a bearing 7. This electrode holder 5 is
As shown in FIG. 2, immediately after the rotation of the grindstone during the grinding process, whirling starts under the influence of the whetstone shaft rotation, but when the electrode holder 5 comes into contact with the work surface 3a, the whirling stops. After that, the grinding process is continued while contacting the surface to be processed as the grindstone progresses.

At this time, in the contact portion between the electrode holder 5 and the surface to be processed,
Since the soft plastic roller 8 as a sliding member is attached to the electrode holder 5 as shown in FIG. 1, it can be moved smoothly without scratching the surface to be processed.

On the other hand, in order to perform the electrolytic dressing, it is necessary to stably supply a grinding rate with an appropriate conductivity between the metal bond grindstone and the electrode. For this reason, the electrode holder 5 is provided with a grinding liquid supply unit. Is provided.

That is, this grinding fluid supply section has a hose connection section 9 for grinding fluid supply and a grinding fluid supply hole 10, and the grinding fluid sent from the hose connection section 9 reaches the position of the electrode 2 through the grinding fluid supply hole 10. Regardless, it is always stably supplied between the metal bond grindstone 1 and the electrode 2. Therefore, the grindstone 1 can be maintained in the grinding process by electrolytic dressing while always maintaining good grindstone sharpness.

(Effects of the Invention) As described above, the present invention is a device for dressing a grindstone in which grinding grains are bonded by a metal bond by an electrode action using an electrode provided opposite to the grindstone. Is attached to the electrode holder so as to be rotatable around the rotation axis of the grindstone independently of the grindstone, and the electrode holder is provided with a sliding member that comes into contact with the surface to be processed during grinding, and between the grindstone and the electrode. Since the grinding liquid supply unit for supplying the grinding liquid is provided, the grindstone holder comes into contact with the surface to be processed through the sliding member by receiving the force of the rotation of the grindstone shaft, and moves along the surface to be processed. The electrodes and the surface to be processed can be smoothly ground without interfering with each other.

In addition, the grinding fluid supply unit provided in the electrode holder stably supplies the grinding fluid between the metal bond grindstone and the electrode regardless of the position of the electrode, so that the sharpness of the grindstone is always improved. It can be maintained and electrolytic dressing can be performed without interruption of the grinding process.

[Brief description of drawings]

FIG. 1 (a) is a front view of an electrolytic dressing apparatus according to the present invention, FIG. 1 (b) is a plan view thereof, FIG. 2 is a view showing a grinding state by a magnet, and FIG. 3 is a conventional grinding state. FIG. 1 ... Metal bond grindstone 2 ... Electrodes 3a, 3b, 3c ... Grinding surface 4 ... Grindstone shaft 5 ... Electrode holder 6 ... Electrode fixture 8 ... Plastic roller 9 ... Hose connection 10 ... ... Grinding fluid supply hole

Claims (1)

[Claims] 1. A device for dressing a grindstone, in which grinding grains are bonded by a metal bond, by an electrolytic action using an electrode provided opposite to the grindstone, wherein the electrode is a rotating shaft of the grindstone by an electrode holder. A slewing member that is rotatably attached to the electrode holder independently of the grindstone, and that supplies grinding fluid to the electrode holder, which contacts the surface to be processed during grinding, and supplies grinding fluid between the grindstone and the electrode. An electrolytic dressing device characterized in that a part is provided.