Processing Method of Titanium Anode Plate for Electrolytic Copper Foil Raw Foil Machine

Abstract

Provide a processing method for a titanium anode plate used in an electrolytic copper foil raw foil machine. By optimizing the structure of the welding end of the conductive stud, adopting a structure with a copper rod and a silver sheet at the welding end, the electrical conductivity of the conductive stud itself is improved. And a welding fixture composed of an arc-shaped positioning fixture, a welding positioning fixture and a vertical plate provides an inert gas protection structure while reliably positioning the titanium anode plate and the conductive stud, solving the problem of poor electrical conductivity at the contact position between the conductive stud and the titanium anode plate due to welding defects. While ensuring the reliability of the welding position of the titanium anode plate and the conductive stud, the welding quality is improved, avoiding the defect that the inner arc surface of the welding bulges and deforms due to the titanium anode plate absorbing hydrogen and oxygen, and improving the quality of the titanium anode plate and the electrical conductivity reliability of the conductive stud.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrolytic copper foils, and particularly relates to a processing method for a titanium anode plate used in an electrolytic copper foil raw foil machine. Background Art

[0002] In the production process of electrolytic copper foils, a coated titanium anode installed on an arc-shaped current collector is usually used as the anode, and a titanium cathode roller is used as the cathode. In an electrolyte mainly composed of CuSO4 - H2SO4, through direct current electrolysis, the cathode roller rotates, and copper foils are continuously produced at the cathode and peeled off from the rotating cathode roller, thereby realizing the continuous production of copper foils.

[0003] During the electrolytic raw foil process, the anode base is processed by high-precision numerical control equipment. However, the titanium anode is usually assembled from titanium plates with a thickness of 3 - 6 mm. Due to the coating process, processing operations cannot be carried out on the inner arc surface (coated surface) of the titanium plate. Therefore, domestic processing of titanium plates uses die stamping to form and then weld single-row studs on the outer arc surface of the titanium plate. At present, domestic back-pull type titanium anode plates use friction welding, and the hot melt friction area of the welding joint is the area with the worst welding quality. The toughness and strength of this area are poor. At the same time, welding can only be carried out on the single outer arc surface in one direction, with poor precision. Since the titanium anode plate absorbs hydrogen and oxygen, it will cause the defect that the inner arc surface of the welding is prone to protrusion deformation, ultimately affecting the conductivity of the titanium anode plate, resulting in the defect that the titanium anode plate cannot be in full contact with the anode base with high precision, thus affecting the continuity and production quality of the copper foil. Therefore, in view of the above problems, it is necessary to make improvements. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a processing method for a titanium anode plate used in an electrolytic copper foil raw foil machine. By optimizing the structure of the welding end of the conductive stud, a structure with a copper rod and a silver sheet provided at the welding end is adopted to improve the conductivity of the conductive stud itself. At the same time, a welding tooling composed of an arc-shaped positioning tooling, a welding positioning tooling, and a vertical plate is used to reliably position the titanium anode plate and the conductive stud while providing an inert gas protection structure, ensuring the reliability of the welding position of the titanium anode plate and the conductive stud, improving the welding quality, avoiding the defect that the inner arc surface of the welding protrudes and deforms due to the titanium anode plate absorbing hydrogen and oxygen, and improving the quality of the titanium anode plate and the conductivity reliability of the conductive stud.

[0005] The technical solution adopted by the present invention: A processing method for a titanium anode plate used in an electrolytic copper foil raw foil machine includes the following steps:

[0006] 1) Process a stepped hole on the bottom surface of the welding end of the conductive stud, where the upper hole diameter is smaller than the lower hole diameter. First, press-fit a copper rod into the small hole at the upper end of the stepped hole, and then insert a silver sheet into the large hole at the lower end of the stepped hole;

[0007] 2) Process a number of welding grooves with a horizontal groove bottom surface on the outer arc surface of the titanium anode plate;

[0008] 3) Set the inner arc surface of the titanium anode plate downward and position it on the arc-shaped positioning tooling. The arc-shaped positioning tooling is fixedly connected to the welding positioning tooling through vertical plates fixed on two long sides, and the titanium anode plate is tightly fixed by a number of pressing columns fixed on the bottom surface of the welding positioning tooling;

[0009] 4) The welding positioning tooling is provided with positioning holes having the same number and corresponding positions as the welding grooves. The welding end of the conductive stud is set downward and passes through the positioning hole and extends into the lower welding groove;

[0010] 5) The arc-shaped positioning tooling is provided with air supply holes having the same number and corresponding positions as the positioning holes. A number of air supply holes are communicated with a high-purity inert gas source through an air supply pipe. The welding position of the conductive stud on the outer arc surface of the titanium anode plate corresponds to the position on the inner arc surface of the titanium anode plate. Under the protection of the inert gas in the air supply holes, manual welding or automatic welding is used to perform welding and fixing operations on each conductive stud and the outer arc surface of the titanium anode plate by means of a number of welding operation holes on the welding positioning tooling.

[0011] In the above step 1), the depth of the large hole at the lower end of the stepped hole is not greater than the thickness of the silver sheet.

[0012] In the above step 3), the upper end surface of the arc-shaped positioning tooling is an arc surface adapted to the bottom surface of the titanium anode plate, and the upper end surface of the arc-shaped positioning tooling is provided with an arc-shaped positioning groove adapted to the titanium anode plate. The four corners of the arc-shaped positioning groove extend outward with arc grooves for quickly taking out the titanium anode plate.

[0013] Further, the cross-sectional shape of the vertical plate is an inverted L-shaped structure, and the lower end of the vertical plate is fixedly connected to the long side of the arc-shaped positioning tooling through a number of screws. The welding positioning tooling is a long plate with a positioning opening on the long side, and the upper end of the vertical plate is adapted to the positioning opening on the corresponding side of the welding positioning tooling, and the welding positioning tooling is fixedly connected to the upper end of the vertical plate through a number of screws.

[0014] Further, a number of threaded holes are evenly distributed on both sides of the central axis of the welding positioning tooling. The lower end surface of the pressing column is an arc surface adapted to the outer arc surface of the titanium anode plate. The bottom surface of the pressing column is provided with a counterbore, and the countersunk head screw adapted to the counterbore is connected to the threaded hole to detachably fix the pressing column on the bottom surface of the welding positioning tooling.

[0015] In the above step 5), the upper end of the air supply hole is a flared hole and the lower end is an equal-diameter hole, and the joint of the air supply pipe is fixedly connected to the equal-diameter hole at the lower end of the air supply hole.

[0016] In step 5) above, when performing the welding and fixing operation on each conductive stud and the outer arc surface of the titanium anode plate by manual welding or automatic welding, the welding current is 120 - 130 A and the welding speed is 0.7 m / min. The inert gas is argon, and the gas flow rate of argon protection is 15 L / min. A plurality of the welding grooves are arranged in multiple rows in a manner that the welding grooves in adjacent two rows are staggeredly distributed, or a plurality of the welding grooves are arranged in a matrix distribution. The horizontal distance between the conductive studs welded in a plurality of the welding grooves is 90 - 110 mm, and the vertical distance between two adjacent conductive studs in the vertical direction is 90 - 120 mm.

[0017] Further, the distance between the long side of the titanium anode plate and the center of the nearest conductive stud and the distance between the short side of the titanium anode plate and the nearest conductive stud do not exceed 150 mm.

[0018] Further, lifting rings are fixed at the four corners of the upper plate surface of the welding positioning tooling.

[0019] Advantages of the present invention compared with the prior art:

[0020] 1. In this technical solution, by optimizing the structure of the welding end of the conductive stud and adopting a structure with a copper bar and a silver sheet provided at the welding end, the electrical conductivity of the conductive stud itself is improved;

[0021] 2. This technical solution uses a welding tooling composed of an arc-shaped positioning tooling, a welding positioning tooling and a vertical plate to reliably position the titanium anode plate and the conductive stud while providing an inert gas protection structure. While ensuring the reliability of the welding position of the titanium anode plate and the conductive stud, it solves the problem of poor electrical conductivity caused by welding defects at the contact position between the conductive stud and the titanium anode plate, improves the welding quality, avoids the defect that the inner arc surface of the titanium anode plate bulges and deforms due to hydrogen absorption and oxygen absorption of the titanium anode plate, and improves the quality of the titanium anode plate and the electrical conductivity reliability of the conductive stud;

[0022] 3. This technical solution is beneficial to reducing the thickness of the titanium anode plate and the material cost by increasing the number of conductive studs and optimizing the distribution of a plurality of conductive studs;

[0023] 4. This technical solution adopts the dimension that the distance between the long side of the titanium anode plate and the center of the nearest conductive stud and the distance between the short side of the titanium anode plate and the nearest conductive stud do not exceed 150 mm, which can ensure that the edge of the titanium anode plate is within the range of the tensile force distribution formed by the outermost conductive studs, thereby reducing the risk of edge warping of the titanium anode plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram after the welding positioning tooling and the arc-shaped positioning tooling of the present invention position the titanium anode plate and the conductive stud;

[0025] Figure 2Schematic diagram of the planar structure when the bottom surface of the welding positioning tooling of the present invention is set upward;

[0026] Figure 3 Schematic diagram of the planar structure of the arc-shaped positioning tooling of the present invention;

[0027] Figure 4 Top view of the titanium anode plate and the conductive stud after welding according to the present invention;

[0028] Figure 5 Side view of the titanium anode plate and the conductive stud after welding according to the present invention. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the Figures 1-5 in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation. Elements defined by the statement "including one..." do not exclude the presence of additional identical elements in the process, method, article or device including the said elements.

[0031] Processing method of the titanium anode plate for the electrolytic copper foil raw foil machine, as Figures 1-5 shown, includes the following steps:

[0032] 1) Process a stepped hole 4 on the bottom surface of the welding end of the conductive stud 3 with an upper hole diameter smaller than the lower hole diameter. First, press-fit a copper rod 5 into the small hole at the upper end of the stepped hole 4, and then insert a silver sheet 6 into the large hole at the lower end of the stepped hole 4; specifically, the depth of the large hole at the lower end of the stepped hole 4 is not greater than the thickness of the silver sheet 6; by optimizing the structure of the welding end of the conductive stud 3 and adopting the structure with a copper rod 5 and a silver sheet 6 provided at the welding end, the electrical conductivity of the conductive stud 3 itself is improved;

[0033] 2) Process a number of welding grooves 2 with a horizontal bottom surface on the outer arc surface of the titanium anode plate 1 to ensure the perpendicularity of the conductive stud 3 after welding the lower end of the conductive stud 3 to the titanium anode plate 1, which is convenient for the subsequent installation of the conductive stud 3 with other parts; the setting of the welding grooves 2 is beneficial to surfacing welding and ensures the welding quality;

[0034] 3) Set the inner arc surface of the titanium anode plate 1 facing downwards and position it on the arc-shaped positioning tooling 7. The arc-shaped positioning tooling 7 is fixedly connected to the welding positioning tooling 9 through the vertical plates 8 fixed on both long sides, and the titanium anode plate 1 is tightly fixed by a plurality of pressing columns 11 fixed on the bottom surface of the welding positioning tooling 9. Through the connection of the arc-shaped positioning tooling 7 and the welding positioning tooling 9 by the vertical plates 8, and the pressing columns 11 on the bottom surface of the arc-shaped positioning tooling 7 abutting against the outer arc surface of the titanium anode plate 1, the positioning reliability of the titanium anode plate 1 is ensured. Moreover, the bottom surface of the pressing column 11 is an arc-shaped structure adapted to the outer arc surface of the titanium anode plate 1, avoiding the problem of deformation of the titanium anode plate 1 caused by stress concentration when the pressing column 11 acts on the titanium anode plate 1 and ensuring the quality of the titanium anode plate 1.

[0035] Specifically, the upper end surface of the arc-shaped positioning tooling 7 is an arc-shaped surface adapted to the bottom surface of the titanium anode plate 1, and an arc-shaped positioning groove 18 adapted to the titanium anode plate 1 is formed on the upper end surface of the arc-shaped positioning tooling 7. Four corners of the arc-shaped positioning groove 18 extend outwards with arc grooves 19 for quickly taking out the titanium anode plate 1. Specifically, the cross-sectional shape of the vertical plate 8 is an inverted L-shaped structure, and the lower end of the vertical plate 8 is fixedly connected to the long side of the arc-shaped positioning tooling 7 through a plurality of screws. The welding positioning tooling 9 is a long plate with positioning openings on the long sides, and the upper end of the vertical plate 8 is adapted to the positioning opening on the corresponding side of the welding positioning tooling 9, and the welding positioning tooling 9 is fixedly connected to the upper end of the vertical plate 8 through a plurality of screws. Specifically, a plurality of threaded holes 14 are evenly distributed on both sides of the central axis of the welding positioning tooling 9. The lower end surface of the pressing column 11 is an arc-shaped surface adapted to the outer arc surface of the titanium anode plate 1. A counterbore 15 is formed on the bottom surface of the pressing column 11, and a countersunk head screw 16 adapted to the counterbore 15 is connected to the threaded hole 14 in a matching manner to detachably fix the pressing column 11 on the bottom surface of the welding positioning tooling 9.

[0036] 4) Positioning holes 10 with the same number and corresponding positions as the welding grooves 2 are formed on the welding positioning tooling 9. The welding end of the conductive stud 3 is set facing downwards and passes through the positioning holes 10 and extends into the welding grooves 2 below. The positioning holes 10 can ensure that the conductive stud 3 is just located in the middle of the welding grooves 2, providing precise positioning for the welding of the conductive stud 3 in the welding grooves 2.

[0037] 5) The arc-shaped positioning tooling 7 is provided with air supply holes 13 having the same number and corresponding positions as the positioning holes 10. A plurality of air supply holes 13 are communicated with a high-purity inert gas source through an air supply pipe. The welding positions of the conductive studs 3 on the outer arc surface of the titanium anode plate 1 correspond to the positions on the inner arc surface of the titanium anode plate 1. Under the protection of the inert gas in the air supply holes 13, manual welding or automatic welding is used to perform welding and fixing operations on each conductive stud 3 and the outer arc surface of the titanium anode plate 1 by using a plurality of welding operation holes 12 on the welding positioning tooling 9. Specifically, when performing welding and fixing operations on each conductive stud 3 and the outer arc surface of the titanium anode plate 1 by manual welding or automatic welding, the welding current is 120-130 A and the welding speed is 0.7 m / min. The inert gas is argon, and the gas flow rate of argon protection is 15 L / min.

[0038] A plurality of the welding grooves 2 are arranged in multiple rows in a manner that the welding grooves 2 in adjacent two rows are staggered, or a plurality of the welding grooves 2 are arranged in a matrix distribution. The horizontal spacing between the conductive studs 3 welded in a plurality of the welding grooves 2 is 100 mm, and the vertical distance between two adjacent conductive studs 3 in the vertical direction is 110 mm. Specifically, the distances from the long side of the titanium anode plate 1 to the center of the nearest conductive stud 3 and from the short side of the titanium anode plate 1 to the nearest conductive stud 3 do not exceed 150 mm. By increasing the number of conductive studs and optimizing the distribution of a plurality of conductive studs 3, it is beneficial to reduce the thickness of the titanium anode plate 1 while reducing the material cost. By adopting the dimension that the distances from the long side of the titanium anode plate 1 to the center of the nearest conductive stud 3 and from the short side of the titanium anode plate 1 to the nearest conductive stud 3 do not exceed 150 mm, it can ensure that the edge of the titanium anode plate 1 is within the tensile force distribution range formed by the outermost conductive stud 3, thereby reducing the risk of edge warping of the titanium anode plate 1.

[0039] After the conductive studs 3 are welded to the titanium anode plate 1, in order to facilitate the lifting and removal of the welding positioning tooling 9, lifting rings 17 are fixed at the four corners of the upper plate surface of the welding positioning tooling 9.

[0040] This technical solution uses a welding tooling composed of an arc-shaped positioning tooling 7, a welding positioning tooling 9, and a vertical plate 8 to provide a reliable positioning for the titanium anode plate 1 and the conductive studs 3 while providing an inert gas protection structure. While ensuring the reliability of the welding positions of the titanium anode plate 1 and the conductive studs 3, it solves the problem of poor conductivity caused by welding defects at the contact positions between the conductive studs 3 and the titanium anode plate 1, improves the welding quality, avoids the defects of protrusion deformation on the inner arc surface of the welding caused by the titanium anode plate 1 absorbing hydrogen and oxygen, and improves the quality of the titanium anode plate 1 and the conductive reliability of the conductive studs 3.

[0041] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0042] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Processing method of titanium anode plate for copper electrolytic foil raw foil machine, characterized in that It includes the following steps: 1) Process a stepped hole (4) on the bottom surface of the welding end of the conductive stud (3) with an upper hole diameter smaller than the lower hole diameter. First, press-fit a copper rod (5) into the small hole at the upper end of the stepped hole (4), and then insert a silver sheet (6) into the large hole at the lower end of the stepped hole (4); 2) Process a number of welding grooves (2) with a horizontal groove bottom surface on the outer arc surface of the titanium anode plate (1); 3) Set the inner arc surface of the titanium anode plate (1) downward and position it on the arc-shaped positioning tooling (7). The arc-shaped positioning tooling (7) is fixedly connected to the welding positioning tooling (9) through vertical plates (8) fixed on both long sides, and presses and fixes the titanium anode plate (1) through a number of pressure columns (11) fixed on the bottom surface of the welding positioning tooling (9); 4) Positioning holes (10) with the same number and corresponding positions as the welding grooves (2) are made on the welding positioning tooling (9). The welding end of the conductive stud (3) is set downward and passes through the positioning holes (10) and extends into the welding grooves (2) below; 5) Air supply holes (13) with the same number and corresponding positions as the positioning holes (10) are made on the arc-shaped positioning tooling (7). A number of air supply holes (13) are connected to a high-purity inert gas source through an air supply pipe. The welding position of the conductive stud (3) on the outer arc surface of the titanium anode plate (1) corresponds to the position on the inner arc surface of the titanium anode plate (1). Under the protection of inert gas in the air supply holes (13), manual welding or automatic welding is used to perform welding and fixing operations on each conductive stud (3) and the outer arc surface of the titanium anode plate (1) by means of a number of welding operation holes (12) on the welding positioning tooling (9); In the above step 3), the upper end surface of the arc-shaped positioning tooling (7) is an arc surface adapted to the bottom surface of the titanium anode plate (1), and an arc-shaped positioning groove (18) adapted to the titanium anode plate (1) is made on the upper end surface of the arc-shaped positioning tooling (7). Arc grooves (19) for quickly removing the titanium anode plate (1) extend outward from the four corners of the arc-shaped positioning groove (18); The cross-sectional shape of the vertical plate (8) is an inverted L-shaped structure, and the lower end of the vertical plate (8) is fixedly connected to the long side of the arc-shaped positioning tooling (7) through a number of screws. The welding positioning tooling (9) is a long plate with a positioning opening made on the long side, and the upper end of the vertical plate (8) is adapted to the positioning opening on the corresponding side of the welding positioning tooling (9), and the welding positioning tooling (9) is fixedly connected to the upper end of the vertical plate (8) through a number of screws; A number of threaded holes (14) are evenly distributed on both sides of the central axis of the welding positioning tooling (9). The lower end surface of the pressure column (11) is an arc surface adapted to the outer arc surface of the titanium anode plate (1). A counterbore (15) is made on the bottom surface of the pressure column (11), and a countersunk head screw (16) adapted to the counterbore (15) is connected to the threaded hole (14) to detachably fix the pressure column (11) to the bottom surface of the welding positioning tooling (9).

2. The processing method of the titanium anode plate for the copper electrolytic foil generator according to claim 1, wherein: In the above step 1), the depth of the large hole at the lower end of the stepped hole (4) is not greater than the thickness of the silver sheet (6).

3. The processing method of the titanium anode plate for the copper electroforming foil machine according to claim 1, characterized in that: In the above step 5), the upper end of the air supply hole (13) is a flared hole and the lower end is an equal-diameter hole, and the joint of the air supply pipe is fixedly connected to the equal-diameter hole at the lower end of the air supply hole (13).

4. The processing method of the titanium anode plate for the copper electroforming foil generator according to claim 1, characterized in that: In the above step 5), when manually welding or automatically welding to fix each conductive stud (3) to the outer arc surface of the titanium anode plate (1), the welding current is 120 - 130 A, the welding speed is 0.7 m / min, the inert gas is argon, and the gas flow rate for argon protection is 15 L / min.

5. The processing method of the titanium anode plate for the copper electroforming foil generator according to claim 1, characterized in that: A plurality of the welding grooves (2) are arranged in multiple rows in a manner that the welding grooves (2) in adjacent rows are staggeredly distributed, or a plurality of the welding grooves (2) are arranged in a matrix distribution. The horizontal distance between the conductive studs (3) welded in the plurality of welding grooves (2) is 90 - 110 mm, and the vertical distance between two adjacent conductive studs (3) in the vertical direction is 90 - 120 mm.

6. The processing method of the titanium anode plate for the copper electroforming foil generator according to claim 1, characterized in that: The distances from the long side of the titanium anode plate (1) to the center of the nearest conductive stud (3) and from the short side of the titanium anode plate (1) to the nearest conductive stud (3) do not exceed 150 mm.

7. The processing method of the titanium anode plate for the copper electrolytic foil raw foil machine according to any one of claims 1-6, characterized in that: Lifting rings (17) are fixed at the four corners of the upper plate surface of the welding positioning tooling (9).

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