Electrolytic dressing device and electrolytic dressing method suitable for cylindrical grinding of steel rolls

Abstract

An electrolytic dressing apparatus and method suitable for cylindrical grinding of steel rolls are provided. It comprises: an abrasive wheel used in the cylindrical grinding of steel rolls for rolling; an electrode positioned opposite the abrasive wheel with a gap between them; and a power source supplying power to the steel roll and the electrode. The surface of the abrasive wheel is energized by a grinding fluid supplied to the gap between the abrasive wheel and the electrode, electrolytically removing the grinding powder from the steel roll adhering to the surface of the abrasive wheel.

Description

Technical Field

[0001] This invention relates to an electrolytic dressing apparatus and method suitable for cylindrical grinding of steel rolls used in rolling. Background Technology

[0002] Steel rolling mill rolls come in various types, including cast steel and tool steel (die steel, high-speed steel). In hot rolling, the raw material is heated and softened due to the high temperature. The purpose of hot rolling is to flatten the raw material as much as possible during high-temperature rolling to reduce the plate thickness. Large-diameter cast steel rolls are used in hot rolling. After hot rolling, the material is shaped into plates or coils, becoming thick plate products. Cold rolling is used to transform the thick plates into thin plates or strips. The plates or coils have been cooled to room temperature. At room temperature, the raw material has higher strength than at high temperatures, and the rolling force required is also greater. Rolls used in cold rolling are made of steel with a strength no weaker than that of the raw material. Therefore, high-alloy tool steels such as die steel and high-speed steel are also used. By using high alloys, the rolls are given higher strength and greater toughness, enabling the rolling of high-strength materials. In particular, high-strength stainless steel and other cold-rolled strip steels are used for springs, representing representative high-hardness materials. High-alloy high-speed steel rolls are suitable for cold rolling, but they need to be periodically re-ground for repeated cold rolling. However, since high-speed steel is a high-alloy tool steel with high strength and toughness, re-grinding has become a difficult machining process.

[0003] If steel rolls are used to repeatedly roll sheet and strip raw materials, traces will remain on the surface where the raw materials contact the rolls. Furthermore, when the rolls are released after rolling, linear marks remain on them. If these marks are left as they are, the raw materials to be rolled subsequently will suffer from shape defects and become defective. Therefore, the rolls are periodically re-ground. However, due to their high strength and toughness, die steel and high-speed steel are prone to having grinding powder adhere to the grinding wheel surface, causing blockage of the grinding wheel orifices and deteriorating grinding performance. This results in the problem of requiring a long time to grind a single roll. Poor grinding performance leads to decreased grinding efficiency, and consequently, decreased production efficiency of sheet and strip. High-speed steel, which has a higher number and amount of alloying elements compared to die steel, is frequently used, as described above, in the rolling of thin sheets and strips made from high-strength stainless steel. Using high-speed steel rolls results in better surface properties of the rolled sheet and strip, achieving a uniform and aesthetically pleasing appearance. However, as mentioned above, high-speed steel rolls are used less frequently compared to die steel due to their poor machinability, which is a challenge for their widespread adoption. Improving the regrinding process of the rolls has also led to the upgrading of sheet and strip products, resulting in higher quality products.

[0004] As a technique to improve the aforementioned grindability, there exists a technique for electrolytically dressing the surface of the grinding wheel simultaneously with the grinding process (during the process). A typical structure of a conventional electrolytic dressing device is shown below. Figure 6 Furthermore, the technology disclosed in Patent Document 1 also exists, for example. The electrolytic dressing apparatus disclosed in Patent Document 1 includes: a grinding wheel for grinding a steel roll used in rolling; an electrolytic dressing electrode, the electrode surface of which is made of a thin metal plate and faces the grinding surface of the grinding wheel through a gap filled with grinding fluid; and a power source that energizes the grinding wheel and the electrolytic dressing electrode by filling the grinding fluid; the steel roll is ground while the surface of the grinding wheel is electrolytically dressed. However, Figure 6 The prior art disclosed in Patent Document 1 necessitates the modification of cylindrical grinding machines, such as assembling complex power supply equipment for stably supplying power to the grinding wheel. This leads to the increasing size and complexity of electrolytic dressing devices, and consequently, an increase in the cost of implementing such devices.

[0005] Furthermore, the increased width of thin plates and strips produced through rolling inevitably necessitates larger steel roller molds. Conductive molds, compared to non-conductive molds, are difficult to mass-produce due to their monolithic design and must be segmented. Consequently, Figure 6 The prior art disclosed in Patent Document 1 is a structure that supplies power to the grinding wheel, which results in the constraint that the grinding wheel must be a conductive material.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent No. 7157990 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] Therefore, the object of the present invention is to provide an electrolytic dressing apparatus and an electrolytic dressing method suitable for cylindrical grinding of steel rollers with a wide range of sizes.

[0011] Methods used to solve problems

[0012] To solve the above-mentioned problems, the electrolytic dressing apparatus of the present invention includes: an abrasive for use in cylindrical grinding of a steel roll for rolling; an electrode facing the abrasive with a gap between them; and a power source for supplying power to the steel roll and the electrode; and energizing the surface of the abrasive by means of grinding fluid supplied to the gap between the abrasive and the electrode, thereby electrolytically removing the grinding powder of the steel roll adhering to the surface of the abrasive.

[0013] Alternatively, in cylindrical grinding, a power source can be used to electrically remove the grinding powder from the steel rollers adhering to the surface of the grinding wheel, in parallel with the cylindrical grinding process.

[0014] Yes, the bonding material of the mold can be a non-conductive bonding material.

[0015] Yes, the grinding wheel is the grinding wheel used in the cylindrical grinding process of high-speed steel rolls used in cold rolling.

[0016] Alternatively, the power supply can be a DC power supply, a DC pulse power supply, an AC power supply, or a bipolar amplifier.

[0017] Furthermore, in order to solve the above-mentioned problems, the electrolytic dressing method of the present invention electrolytically removes the grinding powder of the steel roller adhering to the surface of the grinding wheel used in the cylindrical grinding of the steel roller for rolling, comprising: an electrode setting step, wherein electrodes are set in a manner that faces the grinding wheel with a gap between them; a power supply step, wherein power is supplied to the steel roller and the electrodes; and an electrolytic removal step, wherein the surface of the grinding wheel is energized by using grinding fluid supplied to the gap between the grinding wheel and the electrodes as a medium, thereby electrolytically removing the grinding powder of the steel roller adhering to the surface of the grinding wheel.

[0018] Alternatively, the power supply and electrolytic removal processes can be carried out during cylindrical grinding.

[0019] Alternatively, the power supply process may include an electrode power supply process that supplies power to the electrodes, and a steel roller power supply process that switches the power supply from the abrasive mold to the steel roller.

[0020] Alternatively, the power supply process may include the process of obtaining an additional voltage from a DC power supply, a DC pulse power supply, an AC power supply, or a bipolar amplifier.

[0021] Alternatively, the electrode setting process may include a gap adjustment process that appropriately adjusts the gap between the electrode and the mold according to the conditions.

[0022] Invention Effects

[0023] According to the present invention, an electrolytic dressing apparatus and an electrolytic dressing method suitable for cylindrical grinding of steel rollers with a wide range of sizes can be provided. Attached Figure Description

[0024] Figure 1 This is a diagram showing the structure of the electrolytic conditioning apparatus according to the first embodiment of the present invention.

[0025] Figure 2A This is a diagram showing the structure of the electrode according to the first embodiment of the present invention.

[0026] Figure 2B This is a diagram showing the structure of the electrode according to the first embodiment of the present invention.

[0027] Figure 2C This is a diagram showing the structure of the electrode according to the first embodiment of the present invention.

[0028] Figure 3 This is a diagram illustrating the operation of the electrolytic conditioning apparatus according to the first embodiment of the present invention.

[0029] Figure 4 This is a diagram showing the structure of the electrolytic conditioning apparatus according to the second embodiment of the present invention.

[0030] Figure 5 This is a diagram illustrating the operation of the electrolytic conditioning apparatus according to the second embodiment of the present invention.

[0031] Figure 6 This diagram illustrates an example of the structure of a conventional electrolytic conditioning device. Detailed Implementation

[0032] The following describes the electrolytic conditioning apparatus and method of the present invention. Furthermore, items with the same reference numerals in the figures are identical or equivalent.

[0033] First, the electrolytic conditioning apparatus 100 according to the first embodiment of the present invention will be described.

[0034] Figure 1 This diagram illustrates the structure of the electrolytic dressing apparatus 100 according to the first embodiment of the present invention. The electrolytic dressing apparatus 100 includes a grinding wheel 102, an electrode 103, and a power supply 104. Reference numeral 101 indicates a steel roll for rolling. Reference numeral 105 indicates a grinding fluid supply source (tank), and reference numeral 106 indicates a nozzle for ejecting grinding fluid 107, which is connected to the grinding fluid supply source (tank) via a pipe (hose).

[0035] The steel roll 101 is, for example, a high-speed steel roll for cold rolling used in the manufacture of thin sheets and strips of high-strength stainless steel.

[0036] The grinding wheel 102 is a cylindrical grinding wheel used in the cylindrical grinding process of the steel roller 101, and is driven to rotate by a rotating shaft supported by a device such as a cylindrical grinding machine (not shown). Regarding the bonding material of the grinding wheel 102, metal bonding materials are relatively hard, and therefore may rebound against the steel roller 101, resulting in defects such as impact marks on the surface of the steel roller 101. In such cases, a metal-resin bonding material containing metal fibers is preferred as the bonding material. However, there is no particular limitation on the bonding material of the grinding wheel 102, and various existing bonding materials, including non-conductive bonding materials, can be selected depending on the material of the steel roller 101. Regarding the number of the grinding wheel 102, the applicant of this application has conducted experiments and found that a range from #200 to #4000, and more specifically from #400 to #2000, is preferred. However, there is no particular limitation on the number of the grinding wheel 102, and various existing numbers can be used depending on the material of the steel roller 101. Furthermore, the grit numbers (grit sizes) described in this specification follow or are based on JIS R 6001-1:2017 (Grit size of grinding materials for abrasives - Part 1: Coarse grit) and JIS R 6001-2:2017 (Grit size of grinding materials for abrasives - Part 2: Micro grit), as well as expressions commonly used in the industry of manufacturing and selling abrasives. Regarding the abrasive grains of abrasive 102, the applicant of this application conducted thorough experiments and concluded that CBN (cubic boron nitride) is preferred. However, the abrasive grains of abrasive 102 are not particularly limited to CBN, and can be selected from various existing abrasive grains such as GC (green silicon carbide) abrasives.

[0037] Electrode 103 is used to electrolytically remove grinding powder from the steel roller 101 adhering to the surface of the grinding wheel 102. As shown in the figure, electrode 103 is block-shaped and has an electrode surface with an arc-shaped cross-section. This electrode surface is a long rectangle facing the outer peripheral surface of the grinding wheel 102 and is formed as an inner cylindrical surface to create a gap between it and the outer peripheral surface of the grinding wheel 102, allowing the grinding fluid 107 to be trapped, for example, a gap from about 0.5 mm to about 7.0 mm. Furthermore, in Figure 1 The diagram shows the state in which the electrodes 103 are arranged on the side of the mold 102, but the position of the electrodes 103 is not limited to this. Furthermore, Figure 1 The shape of the electrode 103 shown is illustrative and is not limited thereto.

[0038] Here, refer to Figures 2A to 2C The electrode 103 will be further explained. Figure 2A This is the front view of electrode 103. Figure 2B This is a side view of electrode 103. Figure 2CThis is a sectional view of electrode 103 along line AA. As shown, the surface of electrode 103 facing the mold 102, i.e., the arc-shaped electrode surface, is made of a thin metal plate 201. Furthermore, the portion of electrode 103 other than the surface facing the mold 102 is made of an insulating material 200. Various metals such as titanium and copper can be used as the specific raw material for the thin plate 201. The width of the thin plate 201 (… Figure 2B The transverse width of the electrode 103 is preferably the same as or greater than the width of the mold 102. Various plastics, such as vinyl chloride and polycarbonate, can be used as the specific material for the insulating material 200. By making the electrode 103 into the structure described above, compared with conventional electrodes composed of a single metal block, in addition to significant weight reduction, improvements in manufacturability, portability, and installation, as well as cost reduction, are achieved. Furthermore, there is no particular limitation on the size of the electrode surface, but the applicant of this application has conducted experiments and concluded that good results are obtained when the circumferential length of the electrode surface, i.e., the arc length of the thin plate 201, exceeds 15% of the circumference (outer perimeter) of the mold 102 (i.e., the ratio by which the thin plate 201 covers the mold 102 in the circumferential direction exceeds 15%).

[0039] Power supply 104 is a power source that supplies (powers) the steel roller 101 and electrode 103 with appropriate voltage and current corresponding to conditions such as the material of the steel roller 101, the type of abrasive 102, and the time for electrolytic removal of grinding powder. Various types of power sources, such as DC power supplies, DC pulse power supplies, AC power supplies, and bipolar amplifiers, can be used as power supply 104. In this embodiment, the electrode 103 (thin plate 201) is powered via power supply line (wiring) 108, and the steel roller 101 is powered via power supply line (wiring) 109 (power supply process). Furthermore, there are no particular limitations on the structure or process of powering the steel roller 101; for example, power can be supplied via a brush located at the front end of the power supply line 109, or by exposing the conductor at the front end of the power supply line 109 and making it directly contact the end of the steel roller 101. Alternatively, a wiring switch or similar device may be provided to switch the power supply destination of the power supply line 109 from the mold 102 to the steel roller 101, thereby supplying power to the steel roller 101 instead of the mold 102 (steel roller power supply process).

[0040] While referring to Figure 3The operation of the electrolytic dressing apparatus 100, as described above, will now be explained. First, the electrode 103 is fixed opposite the grinding wheel 102 used in the grinding process of the steel roller 101, with a gap allowing the grinding fluid 107 to be inserted (electrode setting process). Here, the gap allowing the grinding fluid 107 to be inserted can be appropriately adjusted according to conditions such as the material of the steel roller 101, the type of grinding wheel 102, and the time for electrolytic removal of grinding powder (gap adjustment process). Next, the grinding fluid 107 is supplied from the nozzle 106 to the gap between the grinding wheel 102 and the electrode 103, so that it is distributed throughout the surface of the rotating grinding wheel 102 (grinding fluid supply process). Next, power is supplied to the steel roller 101 and the electrode 103 from the power source 104, and the surface of the grinding wheel 102 is energized by the grinding fluid distributed throughout the surface of the grinding wheel 102 (power supply process). Therefore, the grinding powder adhering to the surface of the steel roller 101 on the grinding wheel 102 during grinding is continuously electrolytically removed (electrolytic dressing) (electrolytic removal process), maintaining the contact between the abrasive grains of the grinding wheel 102 and the steel roller 101, thus improving the grinding performance. Furthermore, it is preferable that the grinding powder adhering to the surface of the steel roller 101 on the grinding wheel 102 is continuously electrolytically removed online (in the process) by supplying power during grinding. However, grinding and electrolytic removal do not necessarily need to be performed simultaneously; depending on the material of the steel roller 101, the type of grinding wheel 102, and the time required for electrolytic removal of the grinding powder, they can be performed alternately or at appropriately staggered times.

[0041] Next, the electrolytic conditioning apparatus 400 according to the second embodiment of the present invention will be described.

[0042] Figure 4 This diagram illustrates the structure of the electrolytic dressing apparatus 400 according to a second embodiment of the present invention. The electrolytic dressing apparatus 400 includes an abrasive roller 102, an electrode 401, and a power supply 104. The steel roller 101, abrasive roller 102, power supply 104, grinding fluid supply source (tank) 105, grinding fluid 107, power supply line (wiring) 108, and power supply line (wiring) 109 are the same as in the first embodiment.

[0043] Electrode 401 is used to electrolytically remove grinding powder from the steel roller 101 adhering to the surface of the grinding wheel 102. As shown in the figure, electrode 401 is block-shaped and has an electrode surface with an arc-shaped cross-section. This electrode surface is a long rectangle facing the outer peripheral surface of the grinding wheel 102 and is formed as an inner cylindrical surface to create a gap, for example, about 0.5 mm to 7.0 mm, between itself and the outer peripheral surface of the grinding wheel 102 to allow for the inclusion of grinding fluid 107. Furthermore, in Figure 4 The diagram shows the state in which electrodes 401 are arranged on the side of the mold 102, but the position of electrodes 401 is not limited to this. Furthermore, Figure 4The shape of electrode 401 shown is illustrative and is not limited thereto.

[0044] Next, electrode 401 will be further described. The surface of electrode 401 facing the mold 102, i.e., the arc-shaped electrode surface, is also made of a thin metal plate 201, similar to electrode 103 in the first embodiment. Furthermore, the portion of electrode 401 other than the surface facing the mold 102 is also made of an insulating material 200, similar to electrode 103 in the first embodiment. Various metals such as titanium and stainless steel can be used as the specific raw material for the thin plate 201. The width of the thin plate 201 is preferably the same as or greater than the width of the mold 102. Various plastics such as vinyl chloride and polycarbonate can be used as the specific material for the insulating material 200. By making electrode 401 with the structure described above, compared to conventional electrodes made entirely of metal, in addition to significant weight reduction, improvements in manufacturability, portability, and installation, as well as cost reduction, are achieved. In addition, there is no particular limitation on the size of the electrode surface, but the applicant of this application conducted experiments and obtained the following conclusions: good results can be obtained when the circumferential length of the electrode surface, that is, the arc length of the thin plate 201, exceeds 15% of the circumference (outer circumference) of the mold 102 (that is, the ratio of the thin plate 201 covering the mold 102 in the circumferential direction exceeds 15%).

[0045] Here, the electrode 401 differs from the electrode 103 of the first embodiment in that its interior is hollow, at least one grinding fluid inlet 402 is provided in the insulating material 200, and multiple tiny grinding fluid supply holes (not shown) are provided in the thin plate 201. The grinding fluid inlet 402 is an opening for introducing grinding fluid 107 into the interior of the electrode 401, and is connected to the grinding fluid supply source (tank) 105 by means of a tube (hose). Furthermore, the grinding fluid inlet 402 is located on the front side of the electrode 401 (in...). Figure 4 The electrode 401 can be placed on the front side (the side facing forward), but it can also be placed on other sides such as the back side. By making the electrode 401 into the structure described above, the grinding fluid 107 is uniformly supplied to the gap between the grinding wheel 102 and the electrode 401 through the interior of the electrode 401 and the grinding fluid supply hole, so that it is distributed throughout the surface of the rotary-driven grinding wheel 102 (grinding fluid supply process). As a result, the local unevenness of the flow of grinding fluid 107 in the electrode surface is eliminated, and the surface properties of the grinding wheel 102 can be maintained at a constant level. In addition, when the electrode 401 is placed on the front side, the grinding fluid 107 is evenly supplied to the gap between the grinding wheel 102 and the electrode 401 through the interior of the electrode 401 and the grinding fluid supply hole, so that it is distributed throughout the surface of the rotary-driven grinding wheel 102 (grinding fluid supply process). Figure 4 In the position shown, the diameter of the grinding fluid supply holes can be made smaller towards the bottom (and larger towards the top). By making the diameter of the grinding fluid supply holes smaller towards the bottom, the unevenness of the grinding fluid supply from bottom to top can be eliminated.

[0046] Furthermore, at least one partition wall dividing the interior of electrode 401 can be provided inside electrode 401. By providing a partition wall inside electrode 401, in addition to improving the rigidity of electrode 401, the grinding fluid 107 introduced from grinding fluid inlet 402 can be distributed evenly and well inside electrode 401. Furthermore, when the interior of electrode 401 is divided into different sizes (volumes) by the partition wall, the diameter of the grinding fluid supply hole corresponding to the larger internal space divided by the partition wall and the grinding fluid supply hole corresponding to the smaller internal space divided by the partition wall can be set to different sizes. For example, the grinding fluid supply hole corresponding to the larger internal space divided by the partition wall can be set to a smaller diameter, and the grinding fluid supply hole corresponding to the smaller internal space divided by the partition wall can be set to a larger diameter. The reverse is also possible. By setting different sizes for the grinding fluid supply holes corresponding to the internal space that is larger than the space divided by the partition wall and the internal space that is smaller than the space divided by the partition wall, the uneven supply of grinding fluid 107 to the gap between the grinding tool 102 and the electrode 401 can be eliminated, based on the position, orientation, angle of the electrode 401, the viscosity of the grinding fluid, etc.

[0047] While referring to Figure 5 The operation of the electrolytic dressing apparatus 400, as described above, will now be explained. First, the electrode 401 is fixed opposite the grinding wheel 102 used in the grinding process of the steel roller 101, with a gap allowing the grinding fluid 107 to be inserted (electrode setting process). Here, the gap allowing the grinding fluid 107 to be inserted can be appropriately adjusted according to conditions such as the material of the steel roller 101, the type of grinding wheel 102, and the time for electrolytic removal of grinding powder (gap adjustment process). Next, the grinding fluid 107 is supplied from the grinding fluid supply hole to the gap between the grinding wheel 102 and the electrode 401, so that it is distributed throughout the surface of the rotating grinding wheel 102 (grinding fluid supply process). Next, power is supplied to the steel roller 101 and the electrode 401 from the power source 104, and the surface of the grinding wheel 102 is energized by the grinding fluid distributed throughout the surface of the grinding wheel 102 (power supply process). Therefore, the grinding powder adhering to the surface of the steel roller 101 on the grinding wheel 102 during grinding is continuously electrolytically removed (electrolytic dressing) (electrolytic removal process), maintaining the contact between the abrasive grains of the grinding wheel 102 and the steel roller 101, thus improving the grinding performance. Furthermore, it is preferable that the grinding powder adhering to the surface of the steel roller 101 on the grinding wheel 102 is continuously electrolytically removed online (in the process) by supplying power during grinding. However, grinding and electrolytic removal do not necessarily need to be performed simultaneously; depending on the material of the steel roller 101, the type of grinding wheel 102, and the time required for electrolytic removal of the grinding powder, they can be performed alternately or at appropriately staggered times.

[0048] The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.

[0049] For example, fine grooves can be formed on the electrode surface to allow grinding fluid to flow, so that the grinding fluid supplied from the grinding fluid supply hole is distributed along the grooves throughout the entire electrode surface. This further improves the uniformity of the grinding fluid supply to the gap between the grinding wheel and the electrode.

[0050] According to the electrolytic dressing apparatus and method of the present invention, firstly, unlike conventional technology, it is no longer necessary to supply power to the grinding wheel, so conductive grinding wheels can naturally be used, and non-conductive grinding wheels such as resin-bonded material grinding wheels and GC grinding wheels, which were not conceived in conventional technology, can also be used. Furthermore, according to the electrolytic dressing apparatus and method of the present invention, since it is no longer necessary to supply power to the grinding wheel, unlike conventional technology, there is no need to modify the cylindrical grinding machine by assembling complex power supply equipment for stably supplying power to the grinding wheel. Therefore, according to the electrolytic dressing apparatus and method of the present invention, the frequency of use of high-speed steel rolls increases, and the difficulty of manufacturing plates and strips with high-performance surfaces decreases. In addition, the electrolytic dressing apparatus and method of the present invention also make it possible to use high-performance rolls other than tool steel (e.g., superhard rolls, ceramic rolls). Furthermore, according to the electrolytic finishing apparatus and method of the present invention, in addition to improving surface quality in the cold rolling of high-hardness, high-toughness materials such as stainless steel, the possibility of cold rolling high-hardness, high-toughness materials other than stainless steel is expanded, thus broadening the applications of such materials. Moreover, according to the electrolytic finishing apparatus and method of the present invention, the possibility of using materials with higher strength and toughness than steel (e.g., superalloys) as materials for hot rolling rolls arises.

[0051] Explanation of reference numerals in the attached figures

[0052] 100 Electrolytic Dressing Unit

[0053] 101 Steel Roller

[0054] 102 Abrasive

[0055] 103 electrode

[0056] 104 power supply

[0057] 105 Grinding Fluid Supply Source (Box)

[0058] 106 nozzles

[0059] 107 Grinding Fluid

[0060] 108 power supply line (wiring)

[0061] 109 power supply line (wiring)

[0062] 200 Insulation Material

[0063] 201 Thin Plate

[0064] 400 Electrolytic Dressing Unit

[0065] 401 electrode

[0066] 402 Grinding Fluid Inlet

[0067] 600 Electrolytic Dressing Unit

[0068] 601 electrode

[0069] 602 power supply

[0070] 603 power supply line (wiring)

[0071] 604 power supply line (wiring)

Claims

1. An electrolytic conditioning apparatus, characterized in that, have: Abrasives are used in the cylindrical grinding of steel rolls for rolling. The electrode is positioned opposite the aforementioned grinding wheel with a gap between it; and The power source supplies power to the aforementioned steel roller and the aforementioned electrodes; The bonding material of the aforementioned abrasive is a non-conductive bonding material; In the aforementioned cylindrical grinding process, the aforementioned power supply provides the aforementioned power; Using grinding fluid supplied to the aforementioned gap between the aforementioned grinding wheel and the aforementioned electrode as a medium, the surface of the aforementioned grinding wheel is energized, and the conductive grinding powder of the aforementioned steel roller adhering to the surface of the aforementioned grinding wheel is electrostatically removed in parallel with the aforementioned cylindrical grinding process.

2. The electrolytic conditioning apparatus as described in claim 1, characterized in that, The aforementioned grinding tool is the grinding tool used in the aforementioned cylindrical grinding process of high-speed steel rolls for cold rolling.

3. The electrolytic conditioning apparatus as described in claim 1 or 2, characterized in that, The aforementioned power supply is a DC power supply, a DC pulse power supply, an AC power supply, or a bipolar amplifier.

4. An electrolytic dressing method for electrolytically removing conductive grinding powder from the surface of an abrasive used in cylindrical grinding of a steel roll for rolling, characterized in that, The bonding material of the aforementioned abrasive is a non-conductive bonding material; The aforementioned electrolytic conditioning method has the following features: In the electrode setting process, the electrode is set in a manner that it is positioned opposite the aforementioned mold with a gap between them; The power supply process involves supplying power to the aforementioned steel roller and the aforementioned electrodes; and In the electrolytic removal process, the surface of the aforementioned grinding wheel is energized by the grinding fluid supplied to the aforementioned gap between the aforementioned grinding wheel and the aforementioned electrode, thereby electrolytically removing the aforementioned conductive grinding powder from the aforementioned steel roller that is attached to the surface of the aforementioned grinding wheel. In the aforementioned cylindrical grinding process, the aforementioned power supply process and the aforementioned electrolytic removal process are performed, and the aforementioned conductive grinding powder is electrolytically removed in parallel with the aforementioned cylindrical grinding process.

5. The electrolytic conditioning method as described in claim 4, characterized in that, The aforementioned power supply process includes an electrode power supply process for supplying power to the aforementioned electrodes, and a steel roller power supply process for switching the power supply from the aforementioned abrasive to the aforementioned steel roller.

6. The electrolytic conditioning method as described in claim 4 or 5, characterized in that, The aforementioned power supply process includes the process of obtaining an additional voltage from a DC power supply, a DC pulse power supply, an AC power supply, or a bipolar amplifier.

7. The electrolytic conditioning method as described in claim 6, characterized in that, The aforementioned electrode setting process includes a gap adjustment process that appropriately adjusts the aforementioned gap between the electrode and the aforementioned grinding tool according to the conditions.

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