JP7374542B1 - Electrolytic dressing device and electrolytic dressing method suitable for cylindrical grinding of steel rolls - Google Patents

Abstract

An electrolytic dressing device and an electrolytic dressing method suitable for cylindrical grinding of steel rolls are provided. A grinding wheel used for cylindrical grinding of a steel roll for rolling, an electrode facing the grinding wheel with a gap, and a power source for supplying power to the steel roll and the electrode. Electricity is applied to the surface of the grinding wheel using the supplied grinding fluid as a medium to electrolytically remove the grinding powder from the steel roll adhering to the surface of the grinding wheel.

Description

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

There are various types of steel rolling rolls, such as cast steel and tool steel (die steel, high speed steel). In hot rolling, which involves rolling hot materials, the material is heated and is at a high temperature, making it soft. The purpose of hot rolling is to reduce the thickness of the material by crushing the material as much as possible during high temperatures. Large diameter cast steel rolls are used for hot rolling. After hot rolling, it is shaped into plates and coils, resulting in thick plate products. Cold rolling is the process of rolling a hot-rolled plate product into a thin plate or ribbon product. The plates and coils have already been cooled and are at room temperature. The strength of the material is higher at room temperature than at high temperature, and the force required for rolling is greater. The rolls used for cold rolling are made of higher-strength steel that can match the strength of the raw material. Therefore, high alloy tool steels such as die steel and high speed steel are also used. By using a high alloy, the roll is given higher strength and toughness, making it possible to roll high-strength materials. In particular, polished band steel such as high-strength stainless steel is used for springs, etc., and can be said to be a typical high-hardness material. High-alloy high-speed steel rolls are suitable for cold rolling, but regular re-grinding is required for repeated cold rolling. However, since high-speed steel is a high-alloy tool steel with high strength and toughness, re-grinding is a difficult process.

When a plate or strip material is rolled repeatedly with steel rolls, marks are left on the surface where the material and the roll come into contact. Furthermore, when the rolls are opened after rolling, linear marks are left on the rolls. If these marks are left as they are, the material that is subsequently rolled will suffer shape defects and flaws, resulting in problems. Therefore, the rolls are periodically reground. However, because die steel and high speed steel have high strength and toughness, roll grinding powder adheres to the surface of the grinding wheel, easily clogging the wheel and degrading the grinding performance. This has caused a problem in that it takes a long time to grind one roll. If the grindability is poor, the grinding efficiency will decrease, and as a result, the production efficiency of plates and strips will also decrease. In particular, high-speed steel, which has a greater number and amount of added alloying elements than die steel, is often used for rolling when manufacturing thin plates and ribbons of high-strength stainless steel, as described above. By rolling with high-speed steel rolls, the surface quality of the plate or strip after rolling is good, and a uniform and beautiful appearance can be obtained. However, as mentioned above, high-speed steel rolls have poor grindability and are therefore used less frequently than die steel, which poses a problem for the widespread use of high-speed steel rolls. Improving the re-grinding process for rolling rolls will also lead to higher quality metal plates and strips, which will improve the quality of the products.

As a technique for improving the above-mentioned grindability, there is a technique of electrolytically dressing the surface of the grinding wheel simultaneously with the grinding process (in-process). FIG. 6 shows a typical configuration of a conventional electrolytic dressing device. Furthermore, for example, there is also a technique disclosed in Patent Document 1. The electrolytic dressing device disclosed in Patent Document 1 includes a grinding wheel for grinding a steel roll for rolling, and an electrode made of a thin metal plate with a gap between the grinding surface of the grinding wheel and a grinding liquid. It is equipped with electrodes for electrolytic dressing whose surfaces face each other and a power source that supplies electricity to the grinding wheel and electrode for electrolytic dressing through a grinding fluid, and grinds a steel roll while electrolytically dressing the surface of the grinding wheel. be. However, in the conventional techniques as disclosed in FIG. 6 and Patent Document 1, it is necessary to modify the cylindrical grinding machine, such as by assembling complicated power supply equipment to stably supply power to the grinding wheel. This has led to an increase in the size and complexity of the electrolytic dressing device, and an increase in the cost of introducing the electrolytic dressing device.

In addition, the wider width of thin plates and ribbons produced by rolling necessarily requires larger grinding wheels for steel rolls, and compared to non-conductive grinding wheels, conductive grinding wheels are designed to be integrated. It is difficult to increase the size of the device, so a segment type has no choice but to be used. Furthermore, since the conventional technology disclosed in FIG. 6 and Patent Document 1 has a structure in which power is supplied to the grinding wheel, there is a restriction that the grinding wheel must be conductive.

Patent No. 7157990

Therefore, an object of the present invention is to provide an electrolytic dressing device and an electrolytic dressing method suitable for cylindrical grinding of steel rolls having a wide range of dimensions.

In order to solve the above problems, an electrolytic dressing device according to the present invention includes a grinding wheel used for cylindrical grinding of a steel roll for rolling, an electrode facing the grinding wheel with a gap, and a steel roll and an electrode. A power supply for supplying electricity is provided, and electricity is applied to the surface of the grinding wheel via the grinding liquid supplied to the gap between the grinding wheel and the electrode, and the grinding powder of the steel roll attached to the surface of the grinding wheel is electrolyzed. Remove.

The power supply may supply power during the cylindrical grinding process to electrolytically remove grinding powder from the steel roll adhering to the surface of the grinding wheel in parallel with the cylindrical grinding process.

The bond material of the grinding wheel may be a non-conductive bond material.

The grinding wheel may be a grinding wheel used for cylindrical grinding of high-speed steel rolls for cold rolling.

The power source may be a DC power source, a DC pulse power source, an AC power source, or a bipolar amplifier.

In addition, in order to solve the above problems, the electrolytic dressing method according to the present invention is an electrolytic dressing method that electrolytically removes grinding particles of a steel roll that have adhered to the surface of a grinding wheel used for cylindrical grinding of a steel roll for rolling. The dressing method includes an electrode installation step in which the electrode is installed to face the grinding wheel with a gap, a power feeding step in which power is supplied to the steel roll and the electrode, and a grinding step in which the electrode is supplied to the gap between the grinding wheel and the electrode. The present invention includes an electrolytic removal step of electrolytically removing grinding powder from the steel roll attached to the surface of the grinding wheel by applying electricity to the surface of the grinding wheel using a liquid as a medium.

The power supply step and the electrolytic removal step may be performed during the cylindrical grinding process.

The power supply process may include an electrode power supply process of supplying power to the electrodes, and a steel roll power supply process of switching power supply to the grinding wheel to power supply to the steel roll.

The power supply step may include a step of applying voltage from any of a DC power source, a DC pulse power source, an AC power source, or a bipolar amplifier.

The electrode installation step may include a gap adjustment step of appropriately adjusting the gap between the electrode and the grinding wheel depending on the conditions.

According to the present invention, it is possible to provide an electrolytic dressing device and an electrolytic dressing method suitable for cylindrical grinding of steel rolls having a wide range of dimensions.

1 is a diagram showing the configuration of an electrolytic dressing device according to a first embodiment of the present invention. 1 is a diagram showing the configuration of an electrode according to a first embodiment of the present invention. 1 is a diagram showing the configuration of an electrode according to a first embodiment of the present invention. 1 is a diagram showing the configuration of an electrode according to a first embodiment of the present invention. It is a figure showing operation of an electrolytic dressing device concerning a first embodiment of the present invention. It is a figure showing the composition of the electrolytic dressing device concerning a second embodiment of the present invention. It is a figure showing operation of an electrolytic dressing device concerning a second embodiment of the present invention. 1 is a diagram showing an example of the configuration of a conventional electrolytic dressing device.

Hereinafter, an electrolytic dressing device and an electrolytic dressing method according to the present invention will be explained. Note that throughout the figures, the same reference numerals are used to indicate the same or equivalent parts.

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

FIG. 1 is a diagram showing the configuration of an electrolytic dressing device 100 according to a first embodiment of the present invention. The electrolytic dressing device 100 includes a grinding wheel 102, an electrode 103, and a power source 104. Note that reference numeral 101 is a steel roll for rolling. Reference numeral 105 is a grinding fluid supply source (tank), and reference numeral 106 is a nozzle for discharging the grinding fluid 107, which is connected to the grinding fluid supply source (tank) by a tube (hose).

The steel roll 101 is, for example, a high-speed steel roll for cold rolling, which is used when manufacturing a thin plate or ribbon made of high-strength stainless steel.

The grinding wheel 102 is a cylindrical grinding wheel used for cylindrical grinding of the steel roll 101, and is rotationally driven by a rotating shaft supported by a device such as a cylindrical grinder (not shown). Regarding the bonding material of the grinding wheel 102, since the metal bond is hard, it repels the steel roll 101 and may cause defects such as tataki on the surface of the steel roll 101. In such a case, a metal resin bond material in which a resin bond material contains metal fibers is suitable as the bond material. However, the bonding material for the grinding wheel 102 is not particularly limited, and can be selected from various existing bonding materials, including non-conductive bonding materials, depending on the material of the steel roll 101 and the like. Regarding the number of the grinding wheel 102, as a result of extensive experiments by the applicant, the applicant has found that a range of #200 to #4,000, more specifically a range of #400 to #2,000, is suitable. Ta. However, the number of the grinding wheel 102 is not particularly limited, and may be any of various existing numbers depending on the material of the steel roll 101 and the like. Note that the count (particle size) described in this specification is based on JIS R 6001-1:2017 (particle size of abrasive for grinding wheels - Part 1: Coarse grains) and JIS R 6001-2:2017 (grinding wheels). The particle size of abrasives for use in grinding materials - Part 2: Fine powder) and the notation commonly used in the industry that manufactures and sells grinding wheels shall be followed or conformed to. As for the abrasive grains of the grinding wheel 102, the applicant of the present application has conducted extensive experiments and has found that CBN is suitable. However, the abrasive grains of the grinding wheel 102 are not particularly limited to CBN, and can be selected from various existing abrasive grains such as a GC whetstone.

The electrode 103 is an electrode for electrolytically removing grinding powder from the steel roll 101 adhering to the surface of the grinding wheel 102. The electrode 103 is block-shaped as shown in the figure, and has an electrode surface with an arcuate cross section. This electrode surface has a long rectangular shape facing the outer circumferential surface of the grinding wheel 102, and has a gap between it and the outer circumferential surface of the grinding wheel 102 that allows the interposition of the grinding fluid 107, for example, about 0.5 mm to 7.0 mm. It is formed in the shape of a cylindrical inner peripheral surface so that a gap is formed. Although FIG. 1 shows a state in which the electrodes 103 are arranged side by side with the grinding wheel 102, the position where the electrodes 103 are provided is not limited to this. Further, the shape of the electrode 103 shown in FIG. 1 is an example, and the shape is not limited to this.

Here, the electrode 103 will be further explained with reference to FIGS. 2A to 2C. 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 the line AA. As shown in the figure, the surface of the electrode 103 facing the grinding wheel 102, that is, the electrode surface having an arcuate cross section, is constituted by a thin metal plate 201. Further, the electrode 103 is made of an insulating material 200 in a portion other than the surface facing the grinding wheel 102 . As a specific material for the thin plate 201, various metals such as titanium and copper can be used. The width of the thin plate 201 (the width in the lateral direction in FIG. 2B) is preferably the same as or larger than the width of the grinding wheel 102. As specific materials for the insulating material 200, various plastics such as vinyl chloride and polycarbonate can be used. By configuring the electrode 103 as described above, it is significantly lighter in weight compared to conventional electrodes that are entirely constructed of processed metal blocks, and improves manufacturability, portability, and installation. and cost reduction benefits. Although the size of the electrode surface is not particularly limited, as a result of intensive experiments by the applicant, the length of the electrode surface in the circumferential direction, that is, the arc length of the thin plate 201 is the circumferential length (outer circumferential length) of the grinding wheel 102. It has been found that good effects can be obtained when the ratio of the thin plate 201 covering the grinding wheel 102 in the circumferential direction exceeds 15%.

The power supply 104 is a power supply that supplies (powers) the steel roll 101 and the electrodes 103 with appropriate voltage and current according to conditions such as the material of the steel roll 101, the type of the grinding wheel 102, and the time for electrolytically removing grinding powder. It is. As the power source 104, various types of power sources can be applied, such as a DC power source, a DC pulse power source, an AC power source, and a bipolar amplifier. In this embodiment, power is supplied to the electrode 103 (thin plate 201) via a power supply line (wiring) 108, and power is supplied to the steel roll 101 via a power supply line (wiring) 109. (Power supply process). Note that the structure and process for feeding power to the steel roll 101 are not particularly limited. For example, power may be fed through a brush provided at the tip of the feed line 109, or the conductor at the tip of the feed line 109 may be exposed. After that, power may be supplied by directly contacting the end of the steel roll 101 or the like. Further, for example, power may be supplied to the steel roll 101 instead of the grinding wheel 102 by providing a wiring switch for switching the power supply destination of the power supply line 109 from the grinding wheel 102 to the steel roll 101 ( steel roll feeding process).

The operation of the electrolytic dressing device 100 described above will be described with reference to FIG. 3. First, the electrode 103 is fixed so as to face the grinding wheel 102 used for grinding the steel roll 101 with a gap that allows the interposition of the grinding fluid 107 (electrode installation step). Here, depending on conditions such as the material of the steel roll 101, the type of the grinding wheel 102, and the time for electrolytically removing grinding powder, the gap that allows the presence of the grinding fluid 107 can be adjusted appropriately (gap adjustment). process). Subsequently, the grinding liquid 107 is supplied from the nozzle 106 to the gap between the grinding wheel 102 and the electrode 103, and spread over the surface of the rotating grinding wheel 102 (grinding liquid supply step). Subsequently, power is supplied from the power source 104 to the steel roll 101 and the electrode 103, and the surface of the grinding wheel 102 is energized through the grinding liquid that has spread over the surface of the grinding wheel 102 (power supply step). As a result, the grinding powder of the steel roll 101 adhering to the surface of the grinding wheel 102 during the grinding process is continuously electrolytically removed (electrolytic dressing) (electrolytic removal process), and the abrasive grains of the grinding wheel 102 are transferred to the steel roll 101. It is possible to maintain contact with the material, improving grindability. Note that it is preferable that the grinding powder of the steel roll 101 adhering to the surface of the grinding wheel 102 is continuously electrolytically removed in-line (in-process) by supplying power during the grinding process. However, grinding and electrolytic removal do not necessarily have to be performed at the same time, but may be performed alternately or at different timings depending on conditions such as the material of the steel roll 101, the type of grinding wheel 102, and the time for electrolytically removing grinding powder. It can be shifted as appropriate.

Next, an electrolytic dressing device 400 according to a second embodiment of the present invention will be described.

FIG. 4 is a diagram showing the configuration of an electrolytic dressing device 400 according to a second embodiment of the present invention. The electrolytic dressing device 400 includes a grinding wheel 102, an electrode 401, and a power source 104. The steel roll 101, the grinding wheel 102, the power supply 104, the grinding fluid supply source (tank) 105, the grinding fluid 107, the power supply line (wiring) 108, and the power supply line (wiring) 109 are the same as those in the first embodiment.

The electrode 401 is an electrode for electrolytically removing grinding powder from the steel roll 101 adhering to the surface of the grinding wheel 102. The electrode 401 has a block shape as shown in the figure, and has an electrode surface having an arcuate cross section. This electrode surface has a long rectangular shape facing the outer circumferential surface of the grinding wheel 102, and has a gap between it and the outer circumferential surface of the grinding wheel 102 that allows the interposition of the grinding fluid 107, for example, about 0.5 mm to 7.0 mm. It is formed in the shape of a cylindrical inner peripheral surface so that a gap is formed. Although FIG. 4 shows a state in which the electrode 401 is provided side by side with the grinding wheel 102, the position where the electrode 401 is provided is not limited to this. Moreover, the shape of the electrode 401 shown in FIG. 4 is an example, and the shape is not limited to this.

Next, the electrode 401 will be further explained. The surface of the electrode 401 facing the grinding wheel 102, that is, the electrode surface having an arcuate cross section, is constituted by a thin metal plate 201, similar to the electrode 103 of the first embodiment. Further, the portion of the electrode 401 other than the surface facing the grinding wheel 102 is made of the insulating material 200, similar to the electrode 103 of the first embodiment. As a specific material for the thin plate 201, various metals such as titanium and stainless steel can be used. The width of the thin plate 201 is preferably the same as or greater than the width of the grinding wheel 102. As specific materials for the insulating material 200, various plastics such as vinyl chloride and polycarbonate can be used. By configuring the electrode 401 as described above, it is significantly lighter in weight than conventional electrodes that are entirely made of metal, and also improves manufacturability, portability and installation, and reduces costs. The effect of this can be obtained. Although the size of the electrode surface is not particularly limited, as a result of intensive experiments by the applicant, the length of the electrode surface in the circumferential direction, that is, the arc length of the thin plate 201 is the circumferential length (outer circumferential length) of the grinding wheel 102. It has been found that good effects can be obtained when the ratio of the thin plate 201 covering the grinding wheel 102 in the circumferential direction exceeds 15%.

Here, the electrode 401 has a hollow interior, at least one grinding fluid inlet 402 is provided in the insulating material 200, and the thin plate 201 has a plurality of minute grinding fluid supply holes (Fig. The electrode 103 differs from the electrode 103 according to the first embodiment in that the electrode 103 (not shown) is provided. The grinding liquid inlet 402 is an opening for introducing the grinding liquid 107 into the electrode 401, and is connected to the grinding liquid supply source (tank) 105 through a tube (hose). Although the grinding fluid inlet 402 is provided on the front surface of the electrode 401 (the surface on the near side in FIG. 4), it may be provided on other surfaces such as the back surface. By configuring the electrode 401 as described above, the grinding liquid 107 is uniformly supplied to the gap between the grinding wheel 102 and the electrode 401 through the inside of the electrode 401 and through the grinding liquid supply hole, and the grinding liquid 107 is uniformly supplied to the gap between the grinding wheel 102 and the electrode 401. The grinding fluid is distributed over the surface of the grinding wheel 102 (grinding fluid supply process). As a result, local non-uniformity in the flow of the grinding fluid 107 on the electrode surface is eliminated, and the surface quality of the grinding wheel 102 can be kept constant. Note that when the electrode 401 is provided at a position as shown in FIG. 4, the hole diameter can be made smaller as the lower grinding fluid supply hole is placed (the hole diameter can be made larger as the upper grinding liquid supply hole is placed). By making the diameter of the grinding fluid supply holes smaller toward the bottom, it is possible to eliminate uneven supply of the grinding fluid from the bottom to the top.

Further, the electrode 401 can be provided with at least one partition wall that divides the inside of the electrode 401. By providing a partition inside the electrode 401, the rigidity of the electrode 401 can be increased, and the grinding fluid 107 introduced from the grinding fluid inlet 402 can be distributed in a well-balanced manner inside the electrode 401. Further, when the inside of the electrode 401 is divided into different sizes (volumes) by the partition, the grinding fluid supply hole corresponds to the internal space divided into large parts by the partition, and the grinding fluid supply hole corresponds to the internal space divided into small parts by the partition. The diameter of the grinding liquid supply hole can be made different from that of the grinding liquid supply hole. For example, the grinding fluid supply hole corresponding to the internal space largely divided by the partition wall can have a small hole diameter, and the grinding fluid supply hole corresponding to the interior space divided into small parts by the partition wall can have a large hole diameter. The opposite is also possible. Depending on the position, orientation and angle of the electrode 401, the viscosity of the grinding fluid, etc., there are grinding fluid supply holes corresponding to internal spaces largely divided by partition walls and grinding fluid supply holes corresponding to internal spaces divided into small spaces by partition walls. By making the hole diameters of the grinding fluid supply holes different in size, it is possible to eliminate uneven supply of the grinding fluid 107 to the gap between the grinding wheel 102 and the electrode 401.

The operation of the electrolytic dressing device 400 described above will be described with reference to FIG. 5. First, the electrode 401 is fixed so as to face the grinding wheel 102 used for grinding the steel roll 101 with a gap that allows the interposition of the grinding fluid 107 (electrode installation step). Here, depending on conditions such as the material of the steel roll 101, the type of the grinding wheel 102, and the time for electrolytically removing grinding powder, the gap that allows the presence of the grinding fluid 107 can be adjusted appropriately (gap adjustment). process). Subsequently, the grinding liquid 107 is supplied from the grinding liquid supply hole to the gap between the grinding wheel 102 and the electrode 401, and spread over the surface of the rotating grinding wheel 102 (grinding liquid supply step). Next, power is supplied from the power source 104 to the steel roll 101 and the electrode 401, and the surface of the grinding wheel 102 is energized through the grinding fluid that has spread over the surface of the grinding wheel 102 (power supply step). As a result, the grinding powder of the steel roll 101 adhering to the surface of the grinding wheel 102 during the grinding process is continuously electrolytically removed (electrolytic dressing) (electrolytic removal process), and the abrasive grains of the grinding wheel 102 are transferred to the steel roll 101. It is possible to maintain contact with the material, improving grindability. Note that it is preferable that the grinding powder from the steel roll 101 adhering to the surface of the grinding wheel 102 is continuously electrolytically removed in-line by supplying power during the grinding process. However, grinding and electrolytic removal do not necessarily have to be performed at the same time, but may be performed alternately or at different timings depending on conditions such as the material of the steel roll 101, the type of grinding wheel 102, and the time for electrolytically removing grinding powder. It can be shifted as appropriate.

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

For example, it is possible to form fine grooves on the electrode surface through which the grinding fluid can flow, so that the grinding fluid supplied from the grinding fluid supply hole travels through the grooves and reaches the entire electrode surface. This further increases the uniformity of supply of the grinding liquid to the gap between the grinding wheel and the electrode.

According to the electrolytic dressing device and the electrolytic dressing method according to the present invention, firstly, unlike the conventional technology, there is no need to supply power to the grinding wheel. It becomes possible to apply non-conductive grinding wheels, which was not expected. Further, according to the electrolytic dressing device and the electrolytic dressing method according to the present invention, there is no need to supply power to the grinding wheel unlike the conventional technology, so cylindrical grinding requires assembling complicated power supply equipment to stably supply power to the grinding wheel. There is no need to modify the board. Therefore, according to the electrolytic dressing device and electrolytic dressing method according to the present invention, high-speed steel is used more frequently for rolling rolls, and the difficulty in manufacturing plates and strips having highly functional surfaces is reduced. Furthermore, the electrolytic dressing device and electrolytic dressing method according to the present invention may be applicable to high-performance rolls other than tool steel (for example, carbide rolls and ceramic rolls). Further, according to the electrolytic dressing device and the electrolytic dressing method of the present invention, it is possible to improve the surface quality when cold rolling high hardness and tough materials such as stainless steel, and to improve the surface quality of high hardness and tough materials such as stainless steel. The possibility of cold rolling hard and tough materials will expand, and the applications of high hardness and tough materials other than stainless steel will expand. Further, according to the electrolytic dressing device and the electrolytic dressing method according to the present invention, it is possible to use a material having higher strength and toughness than steel (for example, a superalloy) as a material for a hot rolling roll.

100 Electrolytic dressing device 101 Steel roll 102 Grinding wheel 103 Electrode 104 Power supply 105 Grinding fluid supply source (tank)
106 Nozzle 107 Grinding fluid 108 Power supply line (wiring)
109 Power supply line (wiring)
200 Insulating material 201 Thin plate 400 Electrolytic dressing device 401 Electrode 402 Grinding fluid inlet 600 Electrolytic dressing device 601 Electrode 602 Power supply 603 Power supply line (wiring)
604 Power supply line (wiring)

Claims (7)

A grinding wheel used for cylindrical grinding of steel rolls for rolling,
an electrode facing the grinding wheel with a gap;
A power supply that supplies power to the steel roll and the electrode,
The bond material of the grinding wheel is a non-conductive bond material,
The power source supplies the power during the cylindrical grinding process,
The surface of the grinding wheel is energized through the grinding liquid supplied to the gap between the grinding wheel and the electrode, and the conductive grinding powder of the steel roll attached to the surface of the grinding wheel is removed. electrolytic removal in parallel with the cylindrical grinding process ;
Electrolytic dressing equipment. The electrolytic dressing device according to claim 1 ,
The grinding wheel is a grinding wheel used for the cylindrical grinding of a high-speed steel roll for cold rolling.
Electrolytic dressing equipment. The electrolytic dressing device according to claim 1 or 2 ,
The power source is a DC power source, a DC pulse power source, an AC power source, or a bipolar amplifier.
Electrolytic dressing equipment. An electrolytic dressing method for electrolytically removing conductive grinding powder of the steel roll attached to the surface of a grinding wheel used for cylindrical grinding of a steel roll for rolling, comprising:
The bond material of the grinding wheel is a non-conductive bond material,
an electrode installation step of installing an electrode to face the grinding wheel with a gap;
a power supply step of supplying power to the steel roll and the electrode;
The surface of the grinding wheel is energized through the grinding fluid supplied to the gap between the grinding wheel and the electrode, and the conductive grinding powder of the steel roll adheres to the surface of the grinding wheel. an electrolytic removal step for electrolytically removing the
Equipped with
The power supply step and the electrolytic removal step are performed during the cylindrical grinding process, and the conductive grinding powder is electrolytically removed in parallel with the cylindrical grinding process.
Electrolytic dressing method. In the electrolytic dressing method according to claim 4 ,
The power supply step includes an electrode power supply step of supplying power to the electrode, and a steel roll power supply step of switching power supply to the grinding wheel to power supply to the steel roll.
Electrolytic dressing method. In the electrolytic dressing method according to claim 4 or 5 ,
The power supply step includes a step of applying voltage from any one of a DC power source, a DC pulse power source, an AC power source, or a bipolar amplifier.
Electrolytic dressing method. In the electrolytic dressing method according to claim 6 ,
The electrode installation step includes a gap adjustment step of appropriately adjusting the gap with the grinding wheel according to conditions.
Electrolytic dressing method.

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