JPH0737562U - Electrolytic dressing device for grinding machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electrolytic dressing that effectively supplies an electrolytic solution between the surface of a grindstone and a negative electrode to reduce the amount of electrolytic solution and to eliminate uneven dressing on the surface of the grindstone. [Structure] The electrolytic solution jetted by an electrolytic supply nozzle supplied by an electrolytic solution supply pump to a gap between the negative electrode and the surface of the grindstone forms a liquid pool between the negative electrode and the surface of the grindstone. The liquid reservoir portion and the negative electrode body can be formed by a partition side plate with a seal rubber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for dressing a grinding wheel in a grinder for supplying an electrolytic solution between the surface of a wheel and a negative electrode to perform electrolytic dressing on the surface of the wheel.

[0002]

[Prior art]

 In grinding the surface to be ground with a grindstone like in the case of surface grinding of rolling rolls, in order to prevent the grinding efficiency from decreasing due to an increase in grinding resistance due to the grinding or clogging of the grindstone, dressing of the grindstone surface by electrolytic action ( For this purpose, the grinding machine is equipped with an electrolyte solution supply nozzle on the negative electrode side facing the rotating grindstone so that the electrolytic solution is supplied between the surface of the rotating grindstone and the negative electrode. Dressing equipment is provided.

In this electrolytic dressing device for a grinding machine, in order to uniformly dress the grindstone surface, the space between the dressing and the negative electrode must always be completely filled with the electrolytic solution.

However, if the minimum necessary amount of electrolyte was supplied, the diameter of the grindstone for grinding is not necessarily uniform, so that when the level of the grindstone surface decreases, the gap increases. There is a problem that the amount of electrolyte supplied is insufficient, dressing on the surface of the grindstone is partially insufficient, and the flatness of the surface to be ground is disturbed.

Therefore, an excessive amount of the electrolytic solution is usually supplied to cope with an unexpected shortage of the supplied amount. Further, in Japanese Patent Laid-Open No. 3-239473, a negative electrode provided facing the grindstone surface is provided. A method has been proposed in which the magnet is divided in the rotating direction and the electrolytic elution amount between the magnet surface and the negative electrode surface at each divided portion is controlled.

[0006]

[Problems to be Solved by the Invention] However, this excessive supply of the electrolytic solution is not only wasteful in terms of the electrolytic solution supply facility, but also flows down along the surface of the grindstone, so that a large amount of electrolytic solution is always supplied. It is necessary to supply the air, and since it is supplied by entraining air when supplying the liquid, air accumulates on the contact surface between the grindstone and the negative electrode, and the dressing effect decreases and Sparks may occur and the surface of the grindstone may become rough, making grinding impossible.

Further, even if the control system by dividing the negative electrode described in the above publication is adopted, not only does the control system become complicated, but it does not become a fundamental solution to the problem caused by running down the grindstone surface.

The present invention solves the problems in the electrolytic dressing of the conventional grinding eye, and enables the efficient filling of the negative electrode and the grinding wheel surface with the electrolytic solution by a relatively simple device. It is to provide a board dressing device.

[0009]

[Means for Solving the Problems]

 The electrolytic dressing apparatus for a grinding machine of the present invention is characterized in that a partition plate for forming a reservoir of the supplied electrolytic solution is provided between the grinding wheel and the negative electrode facing the grinding wheel.

The structure of the partition plate may be any partition structure in which the amount of the electrolytic solution supplied by the nozzle is larger than the amount of the electrolytic solution flowing from the grindstone surface.

Specifically, a thin sheet material made of an insulating and flexible material such as a rubber material is attached to a side plate of the negative electrode to form a frame body that covers a grindstone surface on which electrolytic dressing is performed. Further, it is preferable that a flexible sealing material is arranged at the lower end of this frame.

Further, as a structure for forming the electrolyte solution pool most efficiently, it is preferable to provide a seal rubber in contact with the grindstone surface at the lower end of the frame body on the upstream side in the grindstone rotation direction.

[0013]

[Action]

 Since a pool of electrolyte is formed between the grinding wheel surface and the negative electrode, even if the distance between the grinding wheel surface and the negative electrode changes due to fluctuations in the wheel diameter, the gap is always uniform. Therefore, the grinding wheel surface is always dressed under uniform electrolytic conditions. Further, since the nozzle for supplying the electrolytic solution is immersed in the pool of the electrolytic solution, air is not entrained when supplying the electrolytic solution.

[0014]

【Example】

 FIG. 1 is a diagram showing the overall structure of a rolling roll grinder provided with the electrolytic dressing device of the present invention.

In the figure, R indicates a rolling roll which is an object to be ground, and a grinding wheel G is brought into contact with the rolling roll R to rotate the surfaces of the rolling roll R while rotating in opposite directions. In the electrolytic dressing apparatus 10 of the present invention, electrolytic grinding liquid is supplied by the electrolytic solution supply pump 1 between the negative electrode 2 and the grinding wheel G through the nozzle 3 provided inside and outside the negative electrode 2 and supplied. The electrolytic grinding fluid thus formed forms a pool in the frame body 4 provided so as to surround the dressing area of the grinding wheel G, the negative electrode 2 and the lower portion of the outer nozzle. A direct current power source 6 is connected between the positive electrode 5 and the negative electrode 2 in the grinding wheel G, and the electrolytic solution is used to elute the roll-polishing powder in the eyes of the grinding wheel G to clean the grinding surface of the wheel. Reproduce.

FIG. 2 is a view showing the details of the frame body 4, and FIG. 3 is a view of FIG. 2 seen from the side.

As shown in FIG. 3, the frame body 4 is formed by attaching an insulating rubber plate 7 to a side portion of the negative electrode 2. As shown in FIG. 2, the frame 4 is formed in a state of extending upstream in the rotational direction of the grinding wheel G, and a seal rubber 8 is provided at the inner lower end on the upstream side so as to contact the surface of the wheel. Has been.

As a result, the electrolytic grinding liquid supplied from the electrolytic solution supply nozzle 3 provided outside the negative electrode 2 and the nozzle 3 provided inside the negative electrode 2 into the frame body 4 is stored in the frame body 4. Therefore, the gap between the negative electrode 2 and the grinding wheel G is always filled with the electrolytic solution regardless of the variation of the gap, and the grinding powder on the surface of the grinding wheel G is always filled. It will be electrolyzed and eluted under normal conditions.

FIG. 4 shows the effect of the present invention. As a comparative example, the dressing current directly related to the dressing with respect to the amount of the supplied electrolytic solution is provided with an electrolytic solution reservoir by the device shown in FIG. , And the case where no reservoir is provided is compared. As shown in the figure, in the dressing of the grinding wheel of the rolling roll under the same condition, the supply flow rate of the electrolytic solution for obtaining the same dressing current is reduced by about 30%.

[0020]

[Effect of device]

 The present invention has the following effects.

(1) By simply providing a frame for forming a pool of the electrolytic solution in the structure of the conventional electrolytic dressing device, the amount of the supplied electrolytic solution can be reduced without deteriorating the electrolysis conditions.

(2) When attempting to secure a current value for a target dressing, it is possible to save each stage of the electrolytic solution as compared with a conventional dressing device that does not form a pool.

(3) Since the electrolytic solution is evenly supplied to the surface of the grindstone, uneven dressing is less likely to occur, and the chattering phenomenon during grinding of the object to be ground by the grindstone can be reduced.

[Brief description of drawings]

FIG. 1 shows a structure of a rolling roll grinder having a dressing device of the present invention.

FIG. 2 is a detailed view of the dressing device shown in FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a diagram showing an effect of the dressing device of the present invention.

[Explanation of symbols]

R Rolling roll G Grinding wheel 10 Dressing device of the present invention 1 Electrolyte supply pump 2 Negative electrode 3 Electrolyte supply nozzle 4 Frame 5 Positive electrode 6 DC power supply 7 Rubber plate 8 Seal rubber

Front page continuation (72) Creator Takahiro Masachi 1-5-2-2 Mitsuaki, Hachimansai-ku, Kitakyushu, Fukuoka

Claims (2)

[Scope of utility model registration request] 1. An electrolytic dressing device for a grinding machine having an electrolytic solution supply nozzle for supplying an electrolytic solution between the surface of the grinding wheel and the negative electrode, wherein the electrolytic solution is supplied between the surface of the grinding wheel and the negative electrode facing the surface. Electrolytic dressing device for a grinding machine provided with a partition plate for forming a pool. 2. The partition plate for forming a reservoir of the supply electrolyte solution according to claim 1, which is attached to a side plate of the negative electrode, and which is formed on the upstream side of the partition plate in the grindstone rotation direction with the grindstone surface. Electrolytic dressing device for grinding machine with sealing material placed between them.