A high-speed punching die for lead-acid battery grid

Abstract

The invention discloses a high-speed punching die for lead-acid battery grids, comprising an upper template, a lower template, and an inlet trimming die, a grid punching die, a grid pressing die, and an outlet trimming die arranged in sequence along the feeding direction. The inlet trimming die comprises a first trimming sub-die for trimming the material strip once, and a punching sub-die for forming positioning holes at the edge of the material strip is arranged on the inner side of the first trimming sub-die; the grid punching die comprises a plurality of punching sub-dies, each of which is arranged according to the feeding step and punches the material strip in steps in a manner of dividing the target grid; the grid pressing die comprises a pressing sub-die for pressing and forming the connecting ribs after the grid is punched; the outlet trimming die comprises a second trimming sub-die for trimming the material strip twice, and each sub-die is respectively installed on the upper template and the lower template with a structure formed by a convex mold and a concave mold. The above-mentioned mold has a significant molding effect for dense grids, high dimensional accuracy and position accuracy, good product quality, and high production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of battery grid manufacturing, and in particular to a high-speed punching die for a lead-acid battery grid. Background Art

[0002] Lead-acid batteries are a type of chemical power source that stores electrical energy or supplies power to electrical devices through internal chemical reactions. The grid is the main component of lead-acid batteries, which supports active materials and transmits current in the battery.

[0003] In the industry, most grid forming methods are cast. Casting is to pour the heated and molten lead alloy into the grid mold under the action of gravity, then cool it into shape, and then process it. The disadvantages of the casting method are that the casting flash is not easy to remove, and the bevel of the top frame is not easy to polish when splitting. In addition, the grid cast by the traditional grid mold, especially the thin grid, is prone to deformation and has a high scrap rate.

[0004] In addition, there is also a punching method. In actual production, it is found that due to the small thickness and soft material of the grid, the plate is prone to swing in the existing punching die, which leads to deviations between the cutting positions of the horizontal cutter and the vertical cutter and the predetermined position. Especially when the holes are densely packed, the precision requirements are very high and it is easy to break the tendons, causing the grid to be scrapped.

[0005] Therefore, it is hoped that the mold structure can be further optimized to meet production needs. Summary of the invention

[0006] The purpose of the present invention is to provide a high-speed mesh punching die for lead-acid battery grids, so as to reduce manufacturing difficulty, improve production efficiency and ensure product quality.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A high-speed mesh punching die for lead-acid battery grids comprises an upper die plate, a lower die plate, and an inlet trimming die, a grid punching die, a grid pressing die, and an outlet trimming die arranged in sequence along a feeding direction, wherein the inlet trimming die comprises a first trimming sub-die for trimming a material strip once, and a punching sub-die for forming positioning holes at the edge of the material strip is arranged on the inner side of the first trimming sub-die; the grid punching die comprises a plurality of punching sub-dies, each of which is arranged according to a feeding step and punches the material strip in steps in a manner of dividing a target grid; the grid pressing die comprises a pressing sub-die for pressing and forming connecting ribs after the grid is punched; the outlet trimming die comprises a second trimming sub-die for trimming the material strip twice, and each sub-die is respectively mounted on the upper die plate and the lower die plate with a structure formed by a punch and a concave die.

[0009] In particular, it also includes a stripping plate, which is suspended on the upper template through a guide shaft, and a spring is arranged between the stripping plate and the upper template, and a locking tongue mechanism is arranged on the lower template to apply pressure to the edge of the stripping plate, and the stripping plate is fixed to the concave mold of the lower template through the locking tongue mechanism.

[0010] In particular, the locking tongue mechanism includes a driving cylinder, a locking block and a fixed block. The fixed block is fixed on the lower template and is located on one side of the stripping plate. An arc-shaped cavity is provided in the fixed block. The driving cylinder is fixed on the fixed block. The locking block is located in the arc-shaped cavity and is driven and connected to the telescopic rod of the driving cylinder through a positioning pin.

[0011] Particularly, a proximity switch is provided on one side of the bolt mechanism.

[0012] In particular, a double-row pattern is designed in the mold, and a guide sub-mold is arranged between the two rows of patterns. The convex mold of the guide sub-mold is directly inserted from the upper mold plate and matched with the positioning groove on the lower mold plate.

[0013] In particular, the punch pins on each punch are arranged in a gradient from low to high along the feeding direction.

[0014] In particular, an air passage is provided in the punch of the grid punching die, and air holes are formed in the vertical direction of the punch for easy lubrication and cleaning.

[0015] In particular, a guide pin and guide sleeve assembly is arranged between the upper template and the lower template, the guide pin and guide sleeve assembly is provided with a lubrication pipeline, and an overflow groove for collecting lubricating liquid is opened on the lower template, and the overflow groove is lower than the punching surface of the mold.

[0016] In particular, guide plates for preventing the material strip from deviating are respectively arranged in front of the inlet trimming die and behind the outlet trimming die.

[0017] In summary, the beneficial effect of the present invention is that, compared with the prior art, the lead-acid battery grid high-speed punching mold processes the material strip in a continuous mold manner, so that the material strip is subjected to a series of processes such as punching, trimming, grid punching, grid pressing, edge cutting, and guiding in sequence, especially the step-by-step punching method, which has a significant molding effect for dense grids, high dimensional accuracy and positional accuracy, good product quality, and improved mold life, thereby realizing continuous punching and molding of battery grids and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the upper die of the lead-acid battery grid high-speed punching die provided by an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the lower die of the lead-acid battery grid high-speed punching die provided by an embodiment of the present invention;

[0020] Figure 3It is a front view of the mold closing of the lead-acid battery grid high-speed punching mold provided by an embodiment of the present invention;

[0021] Figure 4 It is a side view of the mold closing of the lead-acid battery grid high-speed punching mold provided by an embodiment of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a locking tongue mechanism in a lead-acid battery grid high-speed punching die provided by an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the layout of the lead-acid battery grid high-speed punching die provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0025] See also Figures 1 to 6 As shown, this embodiment provides a high-speed mesh punching die for lead-acid battery grids, including an upper template 1, a lower template 2, and an inlet trimming die, a mesh punching die, a mesh pressing die, an outlet trimming die and a stripping plate 8 arranged in sequence along the feeding direction.

[0026] The inlet trimming die includes a first trimming sub-die 3 for trimming the material strip once, and a punching sub-die 4 for forming positioning holes at the edge of the material strip is arranged inside the first trimming sub-die 3. It is worth mentioning that during the mold closing process, the positioning holes are punched out first, and then the material strip is trimmed and the first grid punching is completed at the same time.

[0027] The grid punching die includes a plurality of punching sub-dies 5, each of which is arranged according to the feeding step and punches the material strip step by step in a manner of dividing the target grid. The step-by-step punching here can improve the forming effect of the dense grid and reduce the difficulty of one-time forming.

[0028] The grid pressing die comprises a pressing sub-die 6, which is used for pressing and forming the connecting ribs after the grid is punched.

[0029] The exit trimming die includes a second trimming sub-die 7 for secondary trimming of the material strip. Here, the second trimming sub-die 7 adopts an independent structure to cut off excess edge material and prevent waste material from jumping up, thereby maximizing the service life and efficiency of the blade.

[0030] Each of the above sub-dies is respectively installed on the upper mold plate 1 and the lower mold plate 2 in a structure formed by a punch and a die. The punch and the die are used in pairs, with high processing accuracy and good position consistency, ensuring accurate positioning and service life during the process, and convenient maintenance and replacement. In order to reduce impact, the punch pins on each punch are preferably arranged in a gradient from low to high along the feeding direction.

[0031] The stripping plate 8 is suspended on the upper template 1 through a guide shaft, and a spring is arranged between the stripping plate 8 and the upper template 1. A locking tongue mechanism 9 for applying pressure to the edge of the stripping plate 8 is arranged on the lower template 2. The stripping plate 8 is fixed to the concave mold of the lower template 2 through the locking tongue mechanism 9, so that the material strip can float and feed in the fixed cavity.

[0032] The locking tongue mechanism 9 includes a driving cylinder 10, a locking block 11 and a fixed block 12. The fixed block 12 is fixed on the lower template 2 and is located on one side of the stripping plate 8. An arc cavity 13 is arranged in the fixed block 12. The driving cylinder 10 is fixed on the fixed block 12. The locking block 11 is located in the arc cavity 13 and is driven and connected to the telescopic rod of the driving cylinder 10 through a positioning pin 14. A proximity switch 15 is arranged on one side of the locking tongue mechanism 9.

[0033] In this mold, a double-row pattern is preferably designed, that is, two plates are punched out at one time. A guiding sub-mold 16 is arranged between the two rows. The guiding sub-mold 16 adopts a rigid unloading design, has high guiding accuracy, and is not prone to stepping on holes. The convex mold of the guiding sub-mold 16 is directly inserted from the upper mold plate 1 and cooperates with the positioning groove on the lower mold plate 2, which is convenient for maintenance and more reliable for disassembly and assembly during use.

[0034] An air passage 17 is provided in the punch of the grid punching die, and air holes for lubrication and cleaning are formed in the vertical direction of the punch to ensure lubrication and cleaning. At the same time, an automatic oil mist supply device is used to ensure forced chip removal.

[0035] A guide pin and guide sleeve assembly 18 is arranged between the upper template 1 and the lower template 2. The guide pin and guide sleeve assembly 18 has a lubrication pipeline 19. An overflow groove 20 for collecting lubricating liquid is opened on the lower template 2. The overflow groove 20 is lower than the punching surface of the mold, which improves the smoothness of the mold closing and ensures that the material strip is not contaminated.

[0036] Guide plates are provided in front of the inlet trimming die and behind the outlet trimming die to prevent the material strip from deviating, thereby preventing the material strip from deviating during operation and facilitating accurate processing and collection of products.

[0037] The entire punching process is as follows: 1) feed guide positioning; 2) positioning holes, trimming, and the first grid punching; 3) multi-step grid punching; 4) grid pressing and forming; 5) edge cutting and guiding; 6) discharge guide.

[0038] In summary, the above-mentioned lead-acid battery grid high-speed punching die processes the material strip in a continuous die manner, so that the material strip undergoes a series of processes such as punching, trimming, grid punching, grid pressing, edge cutting, and guiding in sequence, especially the step-by-step punching method, which has a significant forming effect for dense grids, high dimensional accuracy and positional accuracy, good product quality, and improved mold life, thereby realizing continuous punching and molding of battery grids and high production efficiency.

[0039] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-speed punching die for lead-acid battery grids, characterized in that: It comprises an upper template, a lower template, and an inlet trimming die, a grid punching die, a grid pressing die, and an outlet trimming die arranged in sequence along the feeding direction, wherein the inlet trimming die comprises a first trimming sub-die for trimming the material strip once, and a punching sub-die for forming a positioning hole at the edge of the material strip is arranged on the inner side of the first trimming sub-die; the grid punching die comprises a plurality of punching sub-dies, each of which is arranged according to the feeding step and punches the material strip in steps in a manner of dividing the target grid; the grid pressing die comprises a pressing sub-die for pressing and forming the connecting ribs after the grid is punched; the outlet trimming die comprises a second trimming sub-die for trimming the material strip twice, and each sub-die is respectively installed on the upper template and the lower template in a structure formed by a male die and a female die; It also includes a stripper plate, which is suspended on the upper template through a guide shaft, and a spring is provided between the stripper plate and the upper template, and a locking tongue mechanism for applying pressure to the edge of the stripper plate is provided on the lower template, and the stripper plate is fixed to the concave mold of the lower template through the locking tongue mechanism; A guide plate for preventing the material strip from deviating is respectively arranged in front of the inlet trimming die and behind the outlet trimming die; The locking tongue mechanism includes a driving cylinder, a locking block and a fixed block. The fixed block is fixed on the lower template and is located on one side of the stripping plate. An arc cavity is provided in the fixed block. The driving cylinder is fixed on the fixed block. The locking block is located in the arc cavity and is driven and connected to the telescopic rod of the driving cylinder through a positioning pin.

2. The lead-acid battery grid high-speed punching die according to claim 1, characterized in that: A proximity switch is arranged on one side of the locking tongue mechanism.

3. The lead-acid battery grid high-speed punching die according to claim 1, characterized in that: A double-row pattern arrangement is designed in the mold, and a guide sub-mold is arranged between the two rows of patterns. The convex mold of the guide sub-mold is directly inserted from the upper mold plate and matched with the positioning groove on the lower mold plate.

4. The lead-acid battery grid high-speed punching die according to claim 1, characterized in that: The punch pins on each punch are arranged in a gradient from low to high along the feeding direction.

5. The lead-acid battery grid high-speed punching die according to claim 1, characterized in that: An air passage is arranged in the convex die of the grid punching die, and air holes are formed in the vertical direction of the convex die for facilitating lubrication and cleaning.

6. The lead-acid battery grid high-speed punching die according to claim 1, characterized in that: A guide post and guide sleeve assembly is arranged between the upper template and the lower template, and a lubrication pipeline is provided on the guide post and guide sleeve assembly. An overflow groove for collecting lubrication liquid is provided on the lower template, and the overflow groove is lower than the punching surface of the mold.

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