Device for improving uniformity of electrolytic thinning flow field of wide ultra-thin strip

Abstract

The invention belongs to the technical field of electrolytic machining, and provides a device for improving the uniformity of an electrolytic thinning flow field of a wide ultra-thin strip, the device comprises a supporting table, a cathode thinning assembly is arranged on the supporting table, and a gap for the wide ultra-thin strip to pass through is formed between the cathode thinning assembly and the supporting table; the electrolyte spraying assembly comprises a liquid supply part and a uniform liquid spraying mechanism, the liquid supply part is used for pumping electrolyte into the uniform liquid spraying mechanism, and the uniform liquid spraying mechanism is used for uniformly spraying the electrolyte into a gap between the cathode thinning assembly and the wide ultra-thin strip, so that a current loop is formed between the wide ultra-thin strip and the cathode thinning assembly; and washing the surface of the wide ultra-thin strip. According to the method, the problem of flow velocity loss caused by long electrolyte flow in the width direction of the strip during conventional electrolytic thinning of the wide ultra-thin strip can be solved, the uniformity of a flow field is improved, and finally the electrolytic thinning precision and stability of the wide ultra-thin strip are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrolytic machining, and in particular relates to a device for improving the uniformity of a flow field during electrolytic thinning of a wide ultra-thin strip. Background Art

[0002] Ultra-thin strip is a metal strip with extremely small thickness. It has the characteristics of high precision, excellent performance and super ductility, and is widely used in electronics, computers, medical treatment, energy and transportation. The production of ultra-thin strip mainly adopts advanced rolling technology and high-precision rolling mill equipment, such as asynchronous rolling technology and twenty-high rolling mill. In recent years, the theoretical research on ultra-thin strip has been continuously deepened, including rolling force, minimum rollable thickness and microstructure, which provides important support for improving its production quality and performance.

[0003] When the initial thickness of the strip further decreases, a neutral zone appears in the contact deformation zone and its proportion gradually increases. The rolling pressure increases sharply while the plastic deformation of the rolled piece increases slightly. When the initial thickness decreases to a certain value, the contact deformation zone is an elastic zone, and the strip cannot produce plastic deformation, that is, the limit rolling thickness is reached, which is the true minimum rollable thickness. The minimum rollable thickness is related to the roller diameter, elastic modulus, yield strength of the rolled piece, tensile stress and friction coefficient, as well as the contact arc length, or the rolling force that the rolling mill can provide. Taking stainless steel ultra-thin strip as an example, the minimum thickness theoretical calculation shows that the current minimum thickness of wide ultra-thin strip is 10μm, and it is difficult to further reduce the thickness.

[0004] Compared with other processing methods, electrolytic processing has high processing efficiency, no tool cathode loss, no additional residual stress, no recast layer and micro cracks, high material removal rate, and micron and even nanometer processing capabilities and development prospects. Therefore, electrolytic processing is very suitable for further thinning its thickness, and can also reduce the surface roughness of the rolled ultra-thin strip.

[0005] During electrolytic thinning of wide ultra-thin strips, the current electrolyte flow mode is lateral flow, resulting in a longer electrolyte flow along the width of the ultra-thin strip, electrolyte pressure and flow rate losses, and thus uneven electrolyte flow field distribution, and even liquid shortage, resulting in poor stability and accuracy of electrolytic thinning. Summary of the invention

[0006] The purpose of the present invention is to provide a device for improving the uniformity of the flow field of electrolytic thinning of wide and ultra-thin strips, so as to solve the above-mentioned problems and achieve the purpose of further stably and accurately reducing the thickness of wide and ultra-thin strips by electrolytic processing, and reducing the surface roughness of wide and ultra-thin strips.

[0007] To achieve the above object, the present invention provides the following solution: a device for improving the uniformity of the flow field of wide ultra-thin strip electrolysis thinning, comprising:

[0008] A support table, wherein a cathode thinning component is disposed on the support table, and a gap for passing a wide ultra-thin belt is disposed between the cathode thinning component and the support table;

[0009] The electrolyte spraying assembly comprises a liquid supply part and a uniform liquid spraying mechanism, wherein the liquid supply part is used to pump electrolyte into the uniform liquid spraying mechanism, and the uniform liquid spraying mechanism is used to uniformly spray the electrolyte into the gap between the cathode thinning assembly and the wide ultra-thin belt, so as to form a current loop between the wide ultra-thin belt and the cathode thinning assembly and flush the surface of the wide ultra-thin belt.

[0010] Preferably, the uniform liquid spraying mechanism includes a shunt pipe, one end of a connecting pipe is connected to the middle of the side wall of the shunt pipe, and a plurality of spray pipes are also connected to the side wall of the shunt pipe. The plurality of spray pipes are evenly distributed on the shunt pipe along the axis of the shunt pipe, and the plurality of spray pipes are used to spray electrolyte into the gap between the cathode thinning assembly and the wide ultra-thin belt.

[0011] Preferably, the liquid supply component comprises a water pump, the liquid outlet end of the water pump is connected to an end of the connecting pipe away from the shunt pipe, and the water pump is used to pump the electrolyte into the shunt pipe.

[0012] Preferably, the electrolyte is a mixed solution of 10% sodium chloride and 10% sodium nitrate.

[0013] Preferably, the cathode thinning assembly includes an electrolytic processor, an electrolytic cathode is arranged at the bottom of the electrolytic processor, the electrolytic cathode is arranged above the support table, and a gap is arranged between the bottom of the electrolytic cathode and the top of the support table for passing a wide ultra-thin belt.

[0014] Preferably, support frames are vertically fixedly connected to two opposite side walls of the support platform, and the electrolysis processor is fixedly connected between the tops of the two support frames.

[0015] Preferably, an electrolyte tank for storing electrolyte is fixedly connected to the top of the electrolytic processor, and the liquid inlet end of the water pump is connected to the electrolyte tank.

[0016] Preferably, the shunt pipe is fixedly connected to the side wall of the electrolytic processor via a fixer.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] 1. The thinning device of the present invention can further reduce the thickness of the wide ultra-thin strip, and the thickness of the wide ultra-thin strip can be maintained below 10 μm.

[0019] 2. The pressure loss of the electrolyte can be reduced by the uniform liquid spraying mechanism, so that the electrolyte can be evenly sprayed on the surface of the wide ultra-thin belt, further reducing the processing roughness of the wide ultra-thin belt, so that the roughness of the wide ultra-thin belt is kept below 0.01.

[0020] 3. Through electrolytic machining, the machining efficiency is improved, the precision of wide and ultra-thin strips is enhanced, and it is particularly suitable for large-area material removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic diagram of a thinning device of the present invention;

[0023] Figure 2 It is a schematic diagram of the uniform liquid spraying mechanism of the present invention;

[0024] Figure 3 It is the internal schematic diagram of the shunt pipe of the present invention;

[0025] Figure 4 This is a schematic diagram of the electrolyte flow direction for conventional electrolytic thinning;

[0026] Among them, 1. support table; 2. support frame; 3. electrolytic processor; 4. electrolytic cathode; 5. electrolyte tank; 6. water pump; 7. connecting pipe; 8. shunt pipe; 9. spray pipe; 10. fixer; 14. throttle valve; 15. pipeline. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-Figure 2 The present invention provides a device for improving the uniformity of the flow field of wide ultra-thin strip electrolytic thinning, comprising:

[0030] A support table 1, on which a cathode thinning assembly is disposed, and a gap for passing a wide ultra-thin belt is disposed between the cathode thinning assembly and the support table 1;

[0031] The electrolyte spraying assembly comprises a liquid supply part and a uniform liquid spraying mechanism. The liquid supply part is used to pump electrolyte into the uniform liquid spraying mechanism. The uniform liquid spraying mechanism is used to uniformly spray the electrolyte into the gap between the cathode thinning assembly and the wide ultra-thin belt, so that a current loop is formed between the wide ultra-thin belt and the cathode thinning assembly, and the surface of the wide ultra-thin belt is flushed.

[0032] The main function of the cathode thinning component is to form a current loop through the electrolyte between the wide and ultra-thin belt connected to the anode, so that the wide and ultra-thin belt is continuously electrolyzed and formed into a shape similar to the working surface of the cathode thinning component, achieving the effect of thinning and reducing roughness; the main function of the uniform liquid spraying mechanism is to uniformly spray the electrolyte into the gap between the wide and ultra-thin belt and the cathode thinning component, and flush the electrolysis products from the gap between the wide and ultra-thin belt and the cathode thinning component. On the whole, the present invention can maintain the thickness of the wide and ultra-thin belt below 10μm through electrolytic processing and utilizing the flushing effect of the electrolyte, and can reduce the pressure loss of the electrolyte through the uniform liquid spraying mechanism, so that the electrolyte can be evenly sprayed on the surface of the wide and ultra-thin belt, further reducing the processing roughness of the wide and ultra-thin belt, improving the processing efficiency, and enhancing the precision of the wide and ultra-thin belt, which is particularly suitable for large-area material removal.

[0033] A further optimized solution is that the uniform liquid spraying mechanism includes a shunt pipe 8, one end of the connecting pipe 7 is connected to the middle of the side wall of the shunt pipe 8, and a plurality of spraying pipes 9 are also connected to the side wall of the shunt pipe 8. The plurality of spraying pipes 9 are evenly distributed on the shunt pipe 8 along the axis of the shunt pipe 8, and the plurality of spraying pipes 9 are used to spray electrolyte into the gap between the cathode thinning assembly and the wide ultra-thin belt.

[0034] like Figure 1-Figure 4 As shown, due to the non-uniformity of the flow field, the change in the spatial position of the fluid particle will cause the change in the fluid dynamic pressure. The distance between the fluid in the shunt pipe 8 and the connecting pipe 7 gradually increases, and its fluid pressure gradually decreases, which leads to the pressure loss of the electrolyte, resulting in uneven electrolyte spraying. By evenly arranging multiple spray pipes 9 at the lower end of the shunt pipe 8, the pressure of the fluid at each spray pipe 9 can be basically the same. The multi-channel flow channel formed by the multiple spray pipes 9 will greatly reduce the pressure loss of the electrolyte, thereby making the electrolyte spray uniform.

[0035] like Figure 3As shown, due to the different liquid dynamic pressures at different positions in the shunt pipe 8, direct spraying may result in different liquid spraying rates at different positions in the shunt pipe 8, resulting in uneven surface roughness of the wide ultra-thin strip. Therefore, a plurality of pipes 15 are provided in the shunt pipe 8, and the pipes 15 are used to connect the spray pipe 9 and the connecting pipe 7, and the electrolyte flow rate in each spray pipe 9 is made the same by adjusting a plurality of throttle valves 14. The spray pipe 9 is used for uniform spraying, so that the liquid spraying rate in each spray pipe 9 is the same, so that the roughness of the wide ultra-thin strip is kept below 0.01.

[0036] To further optimize the solution, the throttle valve 14 can be an electromagnetic throttle valve to facilitate the control of flow rate parameters.

[0037] A further optimized solution is to use multiple spray pipes 9 to spray the electrolyte, thereby solving the problem of difficulty in limiting the position of wide and ultra-thin strips of different widths when they are pushed for electrolysis, which easily leads to deviation in the pushing direction and affects the electrolyte amount and efficiency.

[0038] According to a further optimized solution, the liquid supply component includes a water pump 6 , the liquid outlet end of the water pump 6 is connected to an end of the connecting pipe 7 away from the shunt pipe 8 , and the water pump 6 is used to pump the electrolyte into the shunt pipe 8 .

[0039] like Figure 1 As shown, during operation, the electrolyte can be pumped into the shunt pipe 8 via the water pump 6 .

[0040] The solution was further optimized, and the electrolyte was a mixed solution of 10% sodium chloride and 10% sodium nitrate.

[0041] According to a further optimization scheme, the cathode thinning assembly includes an electrolytic processor 3, an electrolytic cathode 4 is arranged at the bottom of the electrolytic processor 3, the electrolytic cathode 4 is arranged above the support table 1, and a gap is arranged between the bottom of the electrolytic cathode 4 and the top of the support table 1 for passing a wide ultra-thin belt.

[0042] like Figure 1 As shown, the bottom of the electrolytic cathode 4 forms a rectangular working surface that can cover the width of the wide ultra-thin strip. The wide ultra-thin strip is connected to the anode. The electrolyte flows between the bottom of the electrolytic cathode 4 and the top of the wide ultra-thin strip, so that the wide ultra-thin strip is electrolyzed. The electrolysis product can be washed away by the electrolyte, reducing the roughness and thickness of the wide ultra-thin strip. Finally, the wide ultra-thin strip after electrolytic processing is transported from the support table 1.

[0043] According to a further optimized solution, support frames 2 are vertically fixedly connected to two opposite side walls of the support platform 1 , and the electrolytic processor 3 is fixedly connected between the tops of the two support frames 2 .

[0044] According to a further optimization scheme, an electrolyte tank 5 for storing electrolyte is fixedly connected to the top of the electrolytic processor 3 , and a liquid inlet end of the water pump 6 is connected to the electrolyte tank 5 .

[0045] According to a further optimized solution, the water pump 6 is fixedly connected to the side wall of the electrolyte tank 5 .

[0046] According to a further optimized solution, the shunt tube 8 is fixedly connected to the side wall of the electrolytic processor 3 via a fixer 10 .

[0047] The working process of this embodiment is as follows: the wide and ultra-thin strip is connected to the anode, and the wide and ultra-thin strip passes through the gap between the electrolytic cathode 4 and the support table 1. At the same time, the water pump 6 drives the electrolyte in the electrolyte tank 5 to be sprayed out from the spray pipe 9 through the connecting pipe 7 and the shunt pipe 8, forming a conductive path between the wide and ultra-thin strip and the electrolytic cathode 4. Under the action of the electrolytic processor 3 and the electrolytic cathode 4, electrochemical anode dissolution is formed. The wide and ultra-thin strip is continuously electrolyzed, and the electrolysis products are continuously washed away by the electrolyte. Finally, the gaps between the electrolytic cathode 4 and the wide and ultra-thin strip at various locations tend to be consistent, and the surface of the wide and ultra-thin strip forms a shape that is basically similar to the working surface at the bottom of the electrolytic cathode 4. In addition, electrolytic processing is more efficient than other processing methods, and is particularly suitable for large-area material removal, and realizes efficient and precise thinning of the wide and ultra-thin strip, so that the thickness of the wide and ultra-thin strip can be kept below 10μm.

[0048] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for improving the uniformity of the flow field of wide ultra-thin strip electrolysis thinning, characterized in that ,include: A support table (1), wherein a cathode thinning component is arranged on the support table (1), and a gap is arranged between the cathode thinning component and the support table (1) for passing a wide ultra-thin belt; The electrolyte spraying assembly comprises a liquid supply part and a uniform liquid spraying mechanism, wherein the liquid supply part is used to pump electrolyte into the uniform liquid spraying mechanism, and the uniform liquid spraying mechanism is used to uniformly spray the electrolyte into the gap between the cathode thinning assembly and the wide ultra-thin belt, so as to form a current loop between the wide ultra-thin belt and the cathode thinning assembly and flush the surface of the wide ultra-thin belt.

2. The device for improving the uniformity of flow field during electrolytic thinning of wide ultra-thin strips according to claim 1, characterized in that: The uniform liquid spraying mechanism comprises a shunt pipe (8), one end of a connecting pipe (7) is connected to the middle of the side wall of the shunt pipe (8), a plurality of spray pipes (9) are fixedly connected to the side wall of the shunt pipe (8), the plurality of spray pipes (9) are evenly distributed on the shunt pipe (8) along the axis of the shunt pipe (8), a plurality of pipes (15) are arranged in the shunt pipe (8), one end of the plurality of pipes (15) are respectively connected to the plurality of spray pipes (9), the other end of the plurality of pipes (15) are respectively connected to the connecting pipe (7), a throttle valve (14) is respectively connected to the plurality of pipes (15), and the plurality of spray pipes (9) are used to spray electrolyte into the gap between the cathode thinning assembly and the wide ultra-thin belt.

3. The device for improving the uniformity of the flow field of wide ultra-thin strip electrolytic thinning according to claim 2, characterized in that: The liquid supply component comprises a water pump (6), the liquid outlet end of the water pump (6) is connected to an end of the connecting pipe (7) away from the shunt pipe (8), and the water pump (6) is used to pump the electrolyte into the shunt pipe (8).

4. The device for improving the uniformity of the flow field of wide ultra-thin strip electrolytic thinning according to claim 2, characterized in that: The electrolyte is a mixed solution of 10% sodium chloride and 10% sodium nitrate.

5. The device for improving the uniformity of the flow field of wide ultra-thin strip electrolytic thinning according to claim 3, characterized in that: The cathode thinning component comprises an electrolytic processor (3), an electrolytic cathode (4) is arranged at the bottom of the electrolytic processor (3), the electrolytic cathode (4) is arranged above the support platform (1), and a gap is arranged between the bottom of the electrolytic cathode (4) and the top of the support platform (1) for passing a wide ultra-thin belt.

6. The device for improving the uniformity of the flow field of wide ultra-thin strip electrolytic thinning according to claim 5, characterized in that: Support frames (2) are respectively and vertically fixedly connected to two opposite side walls of the support platform (1), and the electrolytic processor (3) is fixedly connected between the tops of the two support frames (2).

7. The device for improving the uniformity of flow field during electrolytic thinning of wide ultra-thin strips according to claim 5, characterized in that: An electrolyte tank (5) for storing electrolyte is fixedly connected to the top of the electrolytic processor (3), and the liquid inlet end of the water pump (6) is connected to the electrolyte tank (5).

8. The device for improving the uniformity of flow field during electrolytic thinning of wide ultra-thin strips according to claim 5, characterized in that: The shunt pipe (8) is fixedly connected to the side wall of the electrolytic processor (3) via a fixer (10).

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