TWI837030B - Electrolytic dressing device and electrolytic dressing method suitable for cylindrical grinding of steel rollers - Google Patents

Abstract

An electrolytic dressing device includes a conductive grinding stone used for grinding a steel roller for rolling, an electrode facing the grinding stone with a gap therebetween, and an electrode for supplying power to the grinding stone and the electrode, wherein a conductive grinding fluid is supplied to the gap between the grinding stone and the electrode to electrolytically remove the grinding powder of the steel roller attached to the surface of the grinding stone during grinding, wherein the surface of the electrode facing the grinding stone is made of a metal thin plate, and the portion other than the surface facing the grinding stone is made of an insulating material.

Description

Electrolytic dressing device and electrolytic dressing method for cylindrical grinding of steel rollers

The present invention relates to an electrolytic dressing device and an electrolytic dressing method suitable for cylindrical grinding of steel rolls for rolling.

Steel rolling rolls include cast steel, tool steel (die steel, high-speed steel), and other types. Hot rolling is the process of rolling hot materials by heating the materials and softening them due to the high temperature. The purpose of hot rolling is to flatten the materials as much as possible during the high temperature period to reduce the thickness of the plate. Large-diameter cast steel rolls are used in hot rolling. After hot rolling, the material is formed into the shape of a plate or coil, becoming a thick plate product. Cold rolling is the process of forming a thick plate product after hot rolling into a thin plate or thin strip product. The plate or coil has been cooled and has reached room temperature. The force required to roll the material at high strength at room temperature is greater than that at high temperature. The rolls used in cold rolling are made of steel with a higher strength than that of the material. Therefore, high alloy tool steels called die steel or high speed steel are also used. By using high alloys, high strength and toughness are given to the rollers, and high-strength materials can be rolled. In particular, high-strength stainless steel and other grinding belt steels are used for springs, etc., and can be said to be representative high-hardness materials. In order to cold-roll this, high-alloy high-speed steel rollers are suitable, but repeated cold rolling requires regular regrinding. However, high-speed steel has high strength and toughness, so regrinding becomes a difficult processing process.

When a plate or strip material is rolled with a steel roller, traces will remain on the surface where the material contacts the roller. If these traces are left alone, the continuously rolled material will develop poor shape or defects and become defects. Therefore, the rollers must be regrinded regularly. However, mold steel and high-speed steel have high strength and toughness, so wear Roller grinding powder easily adheres to the stone surface and becomes clogged, making grinding difficult. Therefore, there is a problem that it takes a long time to grind one roller. When the grindability is poor, the grinding efficiency is low, and as a result, the production efficiency of the plate or belt is also low. In particular, high-speed steel has a higher number and amount of alloying elements than die steel. As mentioned above, the material itself is often used for rolling when producing high-strength stainless steel sheets and strips. By rolling with high-speed steel rollers, the surface shape of the rolled plate or strip is good, and a beautiful appearance can be obtained. However, as mentioned above, high-speed steel rollers have poor abrasiveness and are used less frequently than mold steels. This has become a problem in the popularization of high-speed steel rollers. The improvement of the regrinding process of rolling rolls is also related to the improvement of the quality of metal plates and strip products.

As a technique for improving the above-mentioned grindability, there is a technique of electrolytically dressing the surface of a grindstone simultaneously with the grinding process. The typical structure of a conventional electrolytic dressing device is shown in Figure 7 . Furthermore, there is also a technology described in Patent Document 1, for example. The grinding processing device described in Patent Document 1 includes a grinding stone for grinding a workpiece, an electrode for electrolytic dressing facing the grinding surface of the grinding stone with a gap for inserting abrasive fluid, and a grinding stone for inserting abrasive fluid. and a power supply that energizes the electrode for electrolytic dressing, which is used to electrolytically dress the surface of the grinding stone and grind the workpiece. However, the conventional technology described in Patent Document 1 performs electrolytic dressing on the grindstone itself, rather than removing abrasive powder adhered to the surface of the grindstone through electrolysis.

Furthermore, the electrode used in the conventional electrolytic dressing device shown in FIG. 7 is a metal block, which has poor manufacturability, transportability, and installation due to its weight, and also requires a high cost.

[Prior Technical Document] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2010-234474

Here, the purpose of the present invention is to provide an electrolytic dressing device and electrolytic dressing method suitable for cylindrical grinding of steel rollers.

In order to solve the above problems, the electrolytic dressing device according to the present invention includes a conductive grinding stone for grinding a steel roller for rolling, an electrode facing the grinding stone with a gap therebetween, and a power source for supplying power to the grinding stone and the electrode. A conductive grinding fluid is supplied to the gap between the grinding stone and the electrode, and the grinding powder of the steel roller attached to the surface of the grinding stone during the grinding process is electrolytically removed. The surface of the electrode facing the grinding stone is made of a metal thin plate, and the portion other than the surface facing the grinding stone is made of an insulating material.

The interior of the electrode is hollow, and the thin plate has a plurality of tiny polishing liquid supply holes. The polishing liquid can be supplied to the gap through the interior of the electrode and the polishing liquid supply holes.

The interior of the electrode is divided by at least one partition wall, and the diameter of the polishing liquid supply hole may be formed in a manner that the polishing liquid supply hole corresponding to the interior of the electrode divided into a large portion by the partition wall and the polishing liquid supply hole corresponding to the interior of the electrode divided into a small portion by the partition wall are different.

It may also further include: when the above-mentioned electrode is set as the first electrode, an electrode similar to the first electrode is provided as the second electrode at a position different from the first electrode, in a manner facing the grinding stone with a gap therebetween, and the power source is supplied to the second electrode instead of the grinding stone.

One of the electrodes can also be placed directly above the lead of the grindstone.

One of the electrodes can also be placed directly below the lead of the grindstone.

It may also further include: the outer ring is electrically connected to the power source through a power supply line and has a conductive bearing, the bearing is fixed to the shaft of the grindstone in a manner that allows electricity to be supplied, and the grindstone is powered from the power source through the bearing.

The bonding material of the grindstone may be a metal-resin bonding material in which a resin bonding material contains metal fibers to provide electrical conductivity.

The grinding stone can also be numbered from #400 to #2000.

The abrasive grains of the grindstone can also be CBN abrasive grains.

The arc length of the thin plate can also exceed 15% of the circumferential length of the grindstone.

Furthermore, according to the electrolytic dressing method of the present invention, conductive grindstone is supplied to the gap between the conductive grindstone used for grinding the steel roll for rolling and the electrodes facing each other with a gap between the grindstone and the grindstone. The grinding fluid is powered by a power supply to the grindstone and the electrode, and electrolytically removes the grinding powder of the steel roller attached to the surface of the grindstone during the grinding process. The surface of the electrode facing the grindstone is composed of a plurality of tiny grinding wheels. The liquid supply hole is composed of a metal thin plate, and the portion facing other than the surface of the grindstone is hollow and made of an insulating material. The electrolytic dressing method includes: supplying the polishing liquid to the gap through the inside of the electrode and the polishing liquid supply hole. supply steps.

It may also further include: a second electrode setting step, when the electrode is set as the first electrode, an electrode identical to the first electrode is set as the second electrode at a position different from the first electrode, with a gap between the electrode and the grinding stone and facing each other; and a power supply switching step, switching the power supply to the grinding stone to the power supply to the second electrode.

It may also include: a power supply bearing preparation step, which prepares a conductive bearing whose outer ring is electrically connected to the power supply through a power supply line; and a power supply bearing installation step, which arranges the bearing on the grindstone in a manner that can be energized. shaft, and supplies power to the grindstone from the power source through the bearings.

According to the present invention, an electrolytic dressing device and an electrolytic dressing method suitable for cylindrical grinding of steel rollers can be provided.

100:Electrolytic dressing device

101:Steel roller

102:Whetstone

103:Electrode

104: Power supply

105: Grinding fluid supply source

106:Nozzle

107: Accessories

108:Power supply line

109: Power supply line

200:Insulating materials

201: Thin plate

300: Bushing

301:Bearing

302: Hole

400:Electrolytic dressing device

401:Electrode

500:Insulating materials

501: Grinding fluid inlet

502: Thin plate

503: Grinding liquid supply hole

503L: Grinding fluid supply hole

503S: Grinding fluid supply hole

504: Internal

504L:Interior

504S:Interior

505: Partition wall

600: Electrolytic dressing device

601:Electrode

[Figure 1] is a schematic diagram showing the structure of the electrolytic dressing device according to the first embodiment of the present invention.

[Figure 2A] is a front view of an electrode according to the first embodiment of the present invention.

[Fig. 2B] shows a side view of the electrode according to the first embodiment of the present invention.

[Fig. 2C] is a cross-sectional view along line A-A of the electrode according to the first embodiment of the present invention.

[Figure 3A] is a side view of the accessory according to the first embodiment of the present invention.

[Fig. 3B] shows a front view of the accessory according to the first embodiment of the present invention.

[Fig. 4] is a schematic diagram showing the structure of an electrolytic dressing device according to a second embodiment of the present invention.

[Figure 5A] is a front view of an electrode according to the second embodiment of the present invention.

[Fig. 5B] shows a side view of an electrode according to the second embodiment of the present invention.

[Fig. 5C] is a cross-sectional view along the line B-B of the electrode according to the second embodiment of the present invention.

[Fig. 5D] is a cross-sectional view along line B-B showing a modification of the electrode according to the second embodiment of the present invention.

[Fig. 6A] is a schematic diagram showing the structure of an electrolytic dressing device according to a third embodiment of the present invention.

[Fig. 6B] is a schematic diagram showing the structure of a modified example of the electrolytic dressing device according to the third embodiment of the present invention.

[Fig. 7] is a schematic diagram showing an example of the structure of a conventional electrolytic dressing device.

The following describes the electrolytic dressing device and the electrolytic dressing method according to the present invention. In addition, those marked with the same component symbol in each drawing are the same or equivalent.

First, the electrolytic dressing device 100 according to the first embodiment of the present invention will be described.

FIG1 is a schematic diagram showing the structure of an electrolytic dressing device 100 according to the first embodiment of the present invention. The electrolytic dressing device 100 includes a grindstone 102, an electrode 103, and a power source 104. In addition, component symbol 101 is a steel roller for rolling. Furthermore, component symbol 105 is a polishing liquid supply source (tank), and component symbol 106 is a nozzle for discharging the polishing liquid, which is connected to the polishing liquid supply source (tank) through a pipe (hose).

The grinding stone 102 is a cylindrical conductive grinding stone used for grinding the steel roller 101, and is driven to rotate by being supported on a rotating shaft of a device such as a cylindrical grinding disc. As a bonding material for the grinding stone 102, various existing bonding materials can be applied, but metal bonding materials are hard, and when they collide with the steel roller, defects such as knock marks will be generated on the surface of the steel roller. Therefore, as a bonding material for the grinding stone 102, a metal-resin bonding material that contains metal fibers to give electrical conductivity is preferably used. As the number of the grinding stone 102, various existing numbers can be applied, but as a result of the applicant's diligent experiments, the range of #200 to #4000 was obtained, and the range of #400 to #2000 was further limited to the discovery that it is better. In addition, the numbers (grain sizes) described in this specification are based on or in accordance with JIS R 6001-1:2017 (grain sizes of abrasive materials for grinding stones - Part 1: coarse grains), JIS R 6001-2:2017 (grain sizes of abrasive materials for grinding stones - Part 2: fine powders) and the commonly used representation methods in the industry of manufacturing and selling grinding stones. Various existing types of abrasive grains can be applied as grinding stones 102, but the applicant of this case has obtained the opinion that CBN is the best as a result of diligent experiments.

Electrode 103 is an electrode for electrolytically removing the grinding powder of steel roller 101 attached to the surface of grindstone 102. Electrode 103 is block-shaped as shown in the figure, and has an electrode surface with a circular arc cross section. This electrode surface is a long rectangle facing the outer peripheral surface of grindstone 102, and is formed into a cylindrical inner peripheral surface in a manner that forms a gap of about 0.5mm to 7.0mm between the outer peripheral surface of grindstone 102 to allow the intervention of conductive polishing liquid. In addition, FIG. 1 shows that electrode 103 is set to be parallel to grindstone 102, but the position of setting electrode 103 is not limited to this.

The electrode 103 is further described with reference to FIGS. 2A to 2C. FIG. 2A is a front view of the electrode 103, FIG. 2B is a side view of the electrode 103, and FIG. 2C is a cross-sectional view of the electrode 103 taken along line A-A. As shown in the figure, the surface of the electrode 103 facing the grindstone 102, i.e., the electrode surface having an arc-shaped cross section, is formed of a metal thin plate 201. Furthermore, the portion of the electrode 103 other than the surface facing the grindstone 102 is formed of an insulating material 200. As a specific material of the thin plate 201, various metals such as titanium and copper can be applied. The width of the thin plate 201 (the width in the horizontal direction in FIG. 2B) is preferably the same as or greater than the width of the grindstone 102. As the specific material of the insulating material 200, various plastics such as vinyl chloride and polycarbonate can be applied. By making the electrode 103 as described above, compared with the known electrode made entirely of metal, in addition to being greatly lightweight, it also achieves the effects of improved manufacturability, portability, and installation, and reduced costs. In addition, although the size of the electrode surface is not particularly limited, the applicant of this case has made an effort to experiment and found that a good effect can be obtained when the length of the electrode surface in the circumferential direction, that is, the arc length of the thin plate 201 exceeds 15% of the circumference (outer circumference) of the grindstone 102 (that is, the ratio of the thin plate 201 covering the grindstone 102 in the circumferential direction exceeds 15%).

The power supply 104 supplies (power supplies) appropriate voltage and current according to polishing conditions to the grindstone 102 and the electrode 103 . As the power supply 104, various types of power supplies such as DC power supply, DC pulse power supply, AC power supply, and bipolar amplifier can be applied. In this embodiment, power is supplied to the electrode 103 (thin plate 201) through the power supply line 108 (wiring), and power is supplied to the grindstone 102 through the power supply line 109 (wiring). In addition, the grindstone 102 can also be powered by a brush provided at the tip of the power supply line 109. However, if the power is supplied through the power supply accessory 107 (bearing 301) described later, more stable power supply can be achieved. .

Next, the accessory 107 capable of supplying electricity stably to the grindstone 102 will be described with reference to FIGS. 3A and 3B. FIG. 3A is a side view of the accessory 107, and FIG. 3B is a front view of the accessory 107. As shown in the figure, the accessory 107 has a bearing 301 as a main component, and has a sleeve 300 that accommodates the bearing 301 inside. However, the sleeve 300 may be omitted as appropriate. The bearing 301 has conductivity (electricity) and is fixed to the shaft (rotating shaft) of the grindstone 102 in a manner that allows electricity to be supplied. The conductivity (electricity) of the bearing 301 is provided, for example, by using conductive (electricity) grease when assembling the bearing 301. The bearing 301 is electrically connected to the power source 104 by fixing the power supply wire 109 (wiring) to the outer ring. The method of fixing the power supply wire 109 (wiring) to the outer ring is not particularly limited, and can be applied, for example, a method of inserting the power supply wire 109 (wiring) into the hole shown by the component symbol 302 and fixing it, or a method of directly fixing it to the outer ring by soldering. By supplying power to the grindstone 102 through the bearing 301, it is possible to supply power stably compared to supplying power through brushes that are consumed with use. Furthermore, the effect of reducing waste parts is also achieved.

The operation of the electrolytic dressing device 100 described above is described. First, the electrode 103 is fixed in a manner facing the conductive grindstone 102 used for grinding the steel roller 101 with a gap allowing the conductive grinding liquid to be introduced. Then, the grinding liquid is supplied from the nozzle 106 to the gap between the grindstone 102 and the electrode 103, and the grindstone 102 and the electrode 103 are powered by the power supply 104. Thereby, the grinding powder of the steel roller 101 attached to the surface of the grindstone 102 during the grinding process is continuously electrolytically removed (electrolytic dressing), and the abrasive grains of the grindstone 102 can be kept in contact with the steel roller 101, thereby improving the grinding performance. In addition, a conductive (electrically conductive) bearing 301 is prepared in which the outer ring is electrically connected to the power source 104 via a power supply line 109 (wiring) and is set on the shaft of the grindstone 102 in a manner that allows electricity to be supplied. As long as the power source 104 supplies electricity to the grindstone 102 through the bearing 301, electricity can be supplied stably.

Next, the electrolytic dressing device 400 according to the second embodiment of the present invention is described.

FIG4 is a schematic diagram showing the structure of an electrolytic dressing device 400 according to the second embodiment of the present invention. The electrolytic dressing device 400 includes a grindstone 102, an electrode 401, and a power source 104. The steel roller 101, grindstone 102, power source 104, polishing liquid supply source 105 (tank), accessories 107, power supply line 108 (wiring), and power supply line 109 (wiring) are the same as those of the first embodiment.

Electrode 401 is an electrode for electrolytically removing the grinding powder of the steel roller 101 attached to the surface of the grindstone 102. As shown in the figure, the electrode 401 is in a block shape and has an electrode surface with a circular arc cross section. This electrode surface is a long rectangle facing the outer peripheral surface of the grindstone 102, and is formed in a cylindrical inner peripheral surface shape in a manner that a gap of, for example, about 0.5 mm to 7.0 mm is formed between the outer peripheral surface of the grindstone 102 to allow the intervention of conductive polishing liquid. In addition, FIG. 4 shows that the electrode 401 is set to be parallel to the grindstone 102, but the position of setting the electrode 401 is not limited to this.

Next, the electrode 401 will be further described with reference to FIGS. 5A to 5C . FIG. 5A is a front view of the electrode 401 , FIG. 5B is a side view of the electrode 401 , and FIG. 5C is a B-B cross-sectional view of the electrode 401 . As shown in the figure, the surface of the electrode 401 that faces the grindstone 102, that is, the arc-shaped electrode surface in cross section, is made of a metal thin plate 502. Furthermore, the portion of the electrode 401 other than the surface facing the grindstone 102 is covered with an insulating material 500 composition. As a specific material of the thin plate 502, various metals such as titanium and copper can be used. The width of the thin plate 502 (width in the lateral direction in FIG. 5B ) is preferably the same as or greater than the width of the grindstone 102 . As a specific material of the insulating material 500, various plastics such as vinyl chloride and polycarbonate can be used. By having the electrode 401 have the above-mentioned structure, in addition to being significantly lighter than a conventional electrode that is entirely made of metal, the effect of improving fabrication, transportability, and installation properties and reducing costs is also achieved. In addition, although the size of the electrode surface is not particularly limited, as a result of diligent experiments by the applicant of this case, the circumferential length of the electrode surface is obtained, that is, the arc length of the thin plate 502 exceeds 15% of the circumference (outer circumference) of the grindstone 102 (That is, when the ratio of the thin plate 502 covering the grindstone 102 in the circumferential direction exceeds 15%), it is found that a good effect can be obtained.

Here, the electrode 401 is different from the electrode 103 according to the first embodiment in that the interior 504 is hollow, at least one grinding liquid introduction port 501 is provided in the insulating material 500, and a plurality of tiny grinding liquid supply holes 503 are provided in the thin plate 502. The grinding liquid introduction port 501 is an opening for introducing the grinding liquid into the interior 504 of the electrode 401, and is connected to the grinding liquid supply source (slot) by a pipe (hose). In addition, in the electrode 401, although the grinding liquid introduction port 501 is provided on the front side, it can also be provided on other surfaces such as the back side. By setting the electrode 401 to the above-described structure, the polishing liquid is evenly supplied to the gap between the grindstone 102 and the electrode 401 through the inner part 504 of the electrode 401 and the polishing liquid supply hole 503 (polishing liquid supply step). Thereby, the local unevenness of the flow of the polishing liquid in the electrode surface is improved, and the surface property state of the grindstone 102 can be stably maintained. In addition, when the electrode 401 is set to the position shown in Figure 4, the aperture of the polishing liquid supply hole 503 at the lower side can be made smaller (the aperture of the polishing liquid supply hole 503 at the upper side can be made larger). By making the aperture of the polishing liquid supply hole 503 at the lower side smaller, the unevenness of the supply of the polishing liquid from bottom to top can be improved.

Furthermore, the electrode 401 can also be in the form shown in FIG. 5D . That is, at least one partition wall 505 that divides the interior 504 can be provided in the interior 504 of the electrode 401 . By providing the partition wall 505 in the interior 504 of the electrode 401, not only the rigidity of the electrode 401 can be improved, but also the inlet through the polishing fluid can be The polishing fluid introduced in 501 is well-balanced and distributed inside 504 of electrode 401 . Furthermore, when the interior 504 of the electrode 401 is divided into different sizes (volumes) by the partition wall 505, the polishing fluid supply hole 503 (503L) corresponding to the large interior 504 (504L) divided by the partition wall 505 can be provided. And corresponding to the polishing liquid supply hole 503 (503S) divided into small interior parts 504 (504S) by the partition wall 505, the hole diameters of the polishing liquid supply hole 503 have different sizes. For example, the polishing fluid supply hole 503 (503L) corresponding to the interior 504 (504L) divided by the partition wall 505 can be made into a small hole diameter, and the polishing fluid supply hole 503 (503L) corresponding to the interior 504 (504S) divided into small portions by the partition wall 505 can be made. The polishing fluid supply hole 503 (503S) has a large diameter. It can also be the opposite. Depending on the conditions such as the position, direction, angle, and viscosity of the polishing fluid for installing the electrode 401, the polishing fluid supply hole 503 (503L) corresponding to the large interior 504 (504L) divided by the partition wall 505 and the polishing fluid supply hole 503L corresponding to the large interior 504 (504L) divided by the partition wall 505 are formed. The partition wall 505 is divided into small polishing fluid supply holes 503 (503S) in the inner portion 504 (504S) so that the diameters of the polishing fluid supply holes 503 have different sizes, thereby improving the gap between the grindstone 102 and the electrode 401. The supply of polishing fluid is uneven.

By means of the electrolytic dressing device 400 according to the second embodiment of the present invention as described above, the grinding powder of the steel roller 101 attached to the surface of the grinding stone 102 during grinding is continuously electrolytically removed (electrolytic dressing), and the abrasive grains of the grinding stone 102 can be kept in contact with the steel roller 101, thereby improving the grinding performance. In addition, similar to the electrolytic dressing device 100 according to the first embodiment of the present invention, a conductive (electrically conductive) bearing 301 whose outer ring is electrically connected to the power supply 104 via the power supply line 109 (wiring) is prepared and arranged on the shaft of the grinding stone 102 in a manner that can be energized. As long as the grinding stone 102 is powered from the power supply 104 through the bearing 301, it can be powered stably.

Next, the electrolytic dressing device 600 according to the third embodiment of the present invention will be described.

FIG. 6A is a schematic diagram showing the structure of an electrolytic dressing device 600 according to the third embodiment of the present invention. The electrolytic dressing device 600 includes a grindstone 102, an electrode 401, an electrode 601, and a power supply 104. The electrode 401 is the same as the first embodiment. In addition, the steel roller 101, the grindstone 102, the power supply 104, the polishing fluid supply source 105 (trough), and the power supply line 108 (wiring) are the same as those in the first embodiment.

The electrode 401 is an electrode for electrolytically removing the abrasive powder of the steel roller 101 adhering to the surface of the grindstone 102 . The structure of the electrode 401 is the same as that of the second embodiment. In addition, FIG. 6A shows the state in which the electrode 401 is installed in parallel next to the grindstone 102, but the position where the electrode 401 is installed is not limited to this. Furthermore, in this embodiment, the electrode 401 according to the second embodiment is designated as the first electrode, but the first electrode may also be the electrode 103 according to the first embodiment.

The electrode 601 is an electrode (second electrode) having the same structure as the electrode 401 which is the first electrode. The electrode 601 as the second electrode is provided at a position different from the electrode 401 as the first electrode so as to face the grindstone 102 with a gap therebetween (second electrode installation step). In addition, FIG. 6A shows the state where the electrode 601 is installed vertically below the grindstone 102, but the position where the electrode 601 is installed is not limited to this.

In the electrolytic dressing device 600 according to the third embodiment of the present invention, the power supply 104 replaces the grindstone 102 and supplies power to the electrode 601 (second electrode) through the power supply line 109 (wiring).

By means of the electrolytic dressing device 600 according to the third embodiment of the present invention as described above, the grinding powder of the steel roller 101 attached to the surface of the grinding stone 102 during grinding is continuously electrolytically removed (electrolytic dressing), and the contact between the abrasive grains of the grinding stone 102 and the steel roller 101 can be maintained, thereby improving the grinding performance. Furthermore, the power supply from the power source 104 is to the electrode 401 (first electrode) and the electrode 601 (second electrode), thereby making it unnecessary to directly supply power to the rotationally driven grinding stone 102 through the brush or supply power through the bearing 301.

Here, the positions where the electrode 401 (first electrode) and the electrode 601 (second electrode) are provided are not particularly limited. However, as long as one of the electrodes is installed vertically below the grindstone 102, the surroundings of the grindstone 102 will not be pressed. space, furthermore, it can be easily installed just by placing the electrodes. Furthermore, in the modified example shown in FIG. 6B , as long as one of the electrodes is installed vertically above the grindstone 102 , gravity can be used to efficiently supply the gap between the grindstone 102 and the electrode, for example, like a shower. Slurry.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, fine grooves that allow the polishing liquid to flow can be formed on the electrode surface, and the polishing liquid supplied from the polishing liquid supply hole 503 can be spread through the grooves and spread over the entire electrode surface. This further improves the uniformity of supply of the polishing liquid to the gap between the grindstone and the electrode.

By using the electrolytic dressing device and the electrolytic dressing method according to the present invention, the frequency of use of high-speed steel rolling rolls is increased, and the difficulty of manufacturing plates and strips with high-functional surfaces is reduced. Furthermore, the electrolytic dressing device and the electrolytic dressing method according to the present invention can also be applied to high-functional rolls other than tool steel (for example: superhard rolls or ceramic rolls). Furthermore, by using the electrolytic dressing device and the electrolytic dressing method according to the present invention, in the case of cold-rolling high-hardness and high-toughness materials such as stainless steel, in addition to improving the surface quality, the possibility of cold-rolling high-hardness and high-toughness materials other than stainless steel is increased, and the use of high-hardness and high-toughness materials other than stainless steel is expanded. Furthermore, the electrolytic trimming device and electrolytic trimming method according to the present invention make it possible to use materials with higher strength and higher toughness than steel (e.g., superalloys) as materials for hot rolling.

100:Electrolytic dressing device

101:Steel roller

102:Whetstone

103:Electrode

104: Power supply

105: Grinding fluid supply source

106:Nozzle

107:Accessories

108:Power supply line

109:Power supply line

Claims (1)

An electrolytic dressing method in which conductive grinding liquid is supplied to the gap between a conductive grindstone used for grinding steel rolls for rolling and electrodes facing each other with a gap between the grindstone and the grindstone. The power supply supplies power to the grindstone and the electrode, and electrolytically removes the grinding powder of the steel roller attached to the surface of the grindstone during the grinding process, wherein: The surface of the electrode facing the grindstone is made of a metal thin plate having a plurality of tiny polishing fluid supply holes, and the portion other than the surface facing the grindstone is made of an insulating material and is hollow. This electrolytic dressing method includes: A polishing fluid supply step, supplying the polishing fluid to the gap through the interior of the electrode and the polishing fluid supply hole; A second electrode setting step, when setting the electrode as the first electrode, place the same electrode as the first electrode at a position different from the first electrode in a manner that there is a gap between the grindstone and the grindstone. provided as a second electrode; and A power supply switching step: switching the power supply to the grindstone to the power supply to the second electrode.

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