A cold fine blanking die for a new energy vehicle TA1 titanium alloy battery shell

Abstract

A new energy automobile TA1 titanium alloy battery shell cold fine punching die, it includes curved female die, layered binder group, positioning sleeve, binder ring, curved surface drawing punch, upper die plate, the curved female die is located below the positioning sleeve, the layered binder group is installed on the positioning sleeve and extends from the bottom of the positioning sleeve, the binder ring is installed on the positioning sleeve and extends from the top of the positioning sleeve, the binder ring has elastic deformation performance, the upper die plate is located above the positioning sleeve, the upper end surface of the curved female die is provided with a concave forming surface, the forming surface is provided with spherical surface, the layered binder group includes a plurality of binder blocks, the binder blocks adopt radial layered nesting structure, each layer binder block is distributed along the concentric circle of the central axis, the bottom of the binder block is provided with a pressing surface, the curvature of the pressing surface corresponds to the curvature of the forming surface opposite to the vertical direction, the utility model effectively prevents the battery shell from being pulled, improves the product pass rate and economic benefit of enterprises.

Description

Technical Field

[0001] This utility model relates to a cold precision stamping and stretching forming die, and in particular to a cold precision stamping die for a TA1 titanium alloy battery shell for new energy vehicles. Background Technology

[0002] Titanium alloys, as lightweight and green structural materials of the 21st century, have the characteristics of large reserves, high strength, low density, good corrosion resistance, excellent heat resistance, and radiation resistance superior to stainless steel. They are gradually being used in industrial production. For the new energy battery manufacturing industry, the casings of new energy batteries made of titanium alloys have the advantages of high rigidity, high strength, green environmental protection, low long-term cost, and high efficiency. They have begun to be used in the manufacture of new energy batteries such as lithium-ion batteries, hydrogen fuel cells, solid-state batteries, sodium-ion batteries, graphene batteries, and solar cells.

[0003] For the cold stamping of TA1 titanium alloy battery casings, an arc-shaped surface needs to be machined on the battery casing mold. Traditional machining molds use a conical die head to form the arc-shaped surface in one go. This can easily cause localized tearing or wrinkling of the arc-shaped surface, resulting in a high defect rate and reduced economic benefits for manufacturers. Utility Model Content

[0004] Based on this, and to address the shortcomings of existing technologies, a cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles is proposed.

[0005] A cold precision stamping die for a TA1 titanium alloy battery casing for new energy vehicles includes a curved die, a layered blank holder assembly, a positioning sleeve, a blank holder ring, a curved stretching punch, and an upper template. The curved die is located below the positioning sleeve. The layered blank holder assembly is mounted on the positioning sleeve and extends from the bottom of the positioning sleeve. The blank holder ring is mounted on the positioning sleeve and extends from the top of the positioning sleeve, and the blank holder ring has elastic deformation properties. The upper template is located above the positioning sleeve. The upper end face of the curved die has a concave forming surface, which is spherically shaped. The layered blank holder assembly includes several blank holder blocks, which are arranged in a radially layered nested structure. Each layer of blank holder blocks is concentrically distributed along the central axis. The bottom of each blank holder block also has a pressing surface, the curvature of which corresponds to the curvature of the forming surface in the vertical direction. When two adjacent blank holders are pressed into an arc-shaped surface in conjunction with the spherical forming surface, the outer blank holder first reaches the position to cooperate with the forming surface. When pressed further down, the outer blank holder presses the blank, and the inner blank holder further presses the TA1 titanium alloy blank. During the pressing process of the arc-shaped surface, multiple blank holders press different sections of the arc-shaped surface respectively.

[0006] In one embodiment, the device further includes a curved punch that passes through an upper template, a pressure ring, and a layered pressure group, and the curved die is further provided with a downward-through stretching hole at the bottom of the forming surface.

[0007] In one embodiment, the opening of the stretching hole and the forming surface form a smooth curve transition.

[0008] In one embodiment, the device further includes a first driving device, a second driving device, and a third driving device. The first driving device, the second driving device, and the third driving device respectively drive the positioning sleeve, the upper template, and the curved punch to adjust their positions in the vertical direction. When the third driving device drives the curved punch to adjust its position, the curved punch can further extend into the stretching hole of the curved die or exit from the stretching hole of the curved die.

[0009] In one embodiment, the pressure ring has a through hole in the middle, the upper template has a through hole in the middle, and the innermost pressure block has a clearance hole in the middle. The through hole, through hole, clearance hole and stretching hole are aligned with each other in the vertical direction. The curved punch passes through the through hole and through hole in sequence and extends into the clearance hole.

[0010] In one embodiment, between two adjacent pressing blocks of the layered pressing group, the outer pressing block is provided with an L-shaped stepped surface, which is used to limit the inner pressing block.

[0011] In one embodiment, the positioning sleeve is a hollow sleeve with a functional hole that extends through the positioning sleeve along its main axis. The pressing block of the layered pressing group extends out from the opening below the functional hole. The pressing ring enters the functional hole from above and extends out from the opening of the functional hole.

[0012] In one embodiment, the outermost pressing block of the layered pressing group is mounted on the positioning sleeve.

[0013] In one embodiment, the positioning sleeve has a rib on the wall of the functional hole, and a slot is provided on the outer side of the outermost pressing block. The rib on the positioning sleeve is inserted into the slot of the outermost pressing block.

[0014] In one embodiment, the pressure ring is a rubber block.

[0015] The beneficial effects of this utility model of a cold precision stamping die for a TA1 titanium alloy battery casing for new energy vehicles are as follows: By setting a curved die, a layered pressing group, and a pressing ring, the curved die has a spherical forming surface. The layered pressing group includes several pressing blocks, which adopt a radially layered nested structure. When two adjacent pressing blocks cooperate with the spherical forming surface to stamp the arc surface, the outer pressing block reaches the position of cooperating with the forming surface first. When further pressed down, the outer pressing block presses the blank, and the inner pressing block further presses the blank. During the stamping process of the arc surface, multiple pressing blocks press different sections of the arc surface respectively, thereby effectively preventing damage to the battery casing and improving the product qualification rate and economic benefits of the enterprise. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the cold precision stamping die for the TA1 titanium alloy battery shell of the new energy vehicle according to this utility model. Figure 2 for Figure 1 The figure shows a cross-sectional view of the curved die of the cold precision stamping die for the TA1 titanium alloy battery casing of a new energy vehicle. Figure 3 for Figure 1 The image shows a bottom view of the layered edge pressing group of the cold precision stamping die for the TA1 titanium alloy battery casing of a new energy vehicle. Figure 4 for Figure 1 The image shows a cross-sectional view of the blank holder of the cold precision stamping die for the TA1 titanium alloy battery casing of a new energy vehicle. Figure 5 for Figure 1 The diagram shows the structure of the curved punch of the cold precision stamping die for the TA1 titanium alloy battery casing of a new energy vehicle. Figure 6 This is a schematic diagram of a slab being processed into a battery casing. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] Please see Figures 1 to 6This utility model provides a cold precision stamping die for a TA1 titanium alloy battery casing for new energy vehicles, used to process a battery casing 100 made of titanium alloy, forming an arc-shaped surface 110 and a protrusion 120 connected to the top of the arc on the battery casing 100. The titanium alloy is TA1. The cold precision stamping die for the TA1 titanium alloy battery casing for new energy vehicles includes a curved die 10, a layered pressing group 30, a positioning sleeve 20, a pressing ring 40, an upper template 50, a curved punch 60, a first driving device (not shown), a second driving device (not shown), and a third driving device (not shown). The curved die 10 is located below the positioning sleeve 20. The layered pressing group 30 is mounted on the positioning sleeve 20 and extends from the bottom of the positioning sleeve 20. The pressing ring 40 is mounted on the positioning sleeve 20 and extends from the top of the positioning sleeve 20. The upper template 50 is located above the positioning sleeve 20. The curved punch 60 passes through the upper template 50, the pressure ring 40, and the layered pressure group 30. The driving device one, driving device two, and driving device three respectively drive the positioning sleeve 20, the upper template 50, and the curved punch 60 to adjust their positions in the vertical direction. When the driving device three drives the curved punch 60 to adjust its position, the curved punch 60 can further extend into the curved die 10 or exit from the curved die 10.

[0019] The upper end face of the curved die 10 is provided with a concave forming surface 11, which is spherical. The curved die 10 is further provided with a downward through-hole 12 at the bottom of the forming surface 11. The opening of the stretching hole 12 and the forming surface 11 are smoothly transitioned by a curve.

[0020] The positioning sleeve 20 is a hollow sleeve in shape. The positioning sleeve 20 is provided with a functional hole 21. The functional hole 21 penetrates the positioning sleeve 20 along the main axis direction. The positioning sleeve 20 is provided with a protruding rib 22 on the hole wall of the functional hole 21.

[0021] The shape of the pressure ring 40 matches the functional hole 21. A through hole 41 is provided in the center of the pressure ring 40, penetrating the pressure ring 40 along its main axis. The pressure ring 40 is made of a material with a certain elastic deformation. In this embodiment, the pressure ring 40 is a rubber block. When the pressure ring 40 is compressed along its main axis, it undergoes elastic deformation. In this embodiment, the pressure ring 40 is arranged in a layered stacked configuration, consisting of 6 layers stacked vertically.

[0022] The upper template 50 is plate-shaped, and a through hole 51 is provided in the middle of the upper template 50. The curved punch 60 includes a die shank 61 and a punch rod 63 vertically connected to the die shank 61. A punch head 62 is provided at the end of the punch rod 63 away from the die shank 61, and the outer surface of the punch head 62 is spherical.

[0023] The layered edge-pressing group 30 includes several edge-pressing blocks 31, which are arranged in a radially layered nested structure. Each layer of edge-pressing blocks 31 is concentrically distributed along the central axis, with adjacent layers tightly wrapped to form a gradient stack. Between two adjacent edge-pressing blocks 31, the outer edge-pressing block 31 has an L-shaped stepped surface 311 to limit the inner edge-pressing block 31 and prevent it from detaching from the outer edge-pressing block 31. The bottom of each edge-pressing block 31 also has a pressing surface 314, the curvature of which corresponds to the curvature of the forming surface 11 in the vertical direction. Additionally, the outermost edge-pressing block 31 has a slot 312 on its outer side, and the innermost edge-pressing block 31 has a clearance hole 313 in its center.

[0024] During assembly, the outermost pressing block 31 of the layered pressing group 30 is installed on the positioning sleeve 20, and the protruding rib 22 on the positioning sleeve 20 is engaged in the slot 312 of the outermost pressing block 31. The pressing block 31 of the layered pressing group 30 extends out from the opening below the functional hole 21. The pressing ring 40 is engaged into the functional hole 21 from above and extends out from the opening of the functional hole 21. The through hole 51 of the upper template 50, the through hole 41 of the pressing ring 40, the clearance hole 313 of the innermost pressing block 31, and the stretching hole 12 of the curved die 10 are aligned with each other in the vertical direction. The punch head 62 of the curved punch 60 passes through the through hole 51 and the through hole 41 in sequence and extends into the clearance hole 313.

[0025] When processing the product, the first driving device, the second driving device, and the third driving device respectively drive the positioning sleeve 20, the upper template 50, and the curved punch 60 to rise. Then, the blank 200 is placed on the upper end face of the curved die 10. The first driving device drives the positioning sleeve 20 to press down, so that the positioning sleeve 20 presses the edge of the blank 200. The bottom of the pressing block 31 abuts against the upper end face of the blank 200, and the upper ends of the pressing blocks 31 are basically flush.

[0026] The second driving device drives the upper template 50 to press down. When the upper template 50 presses down, it pushes the pressure ring 40 down, and the pressure ring 40 pushes the pressure blocks 31 down together, causing the blank 200 to stretch and deform between the pressure blocks 31. During further pressing, the pressure ring 40 further elastically deforms. Different pressure blocks 31 distributed from the outside to the inside are pressed down sequentially to the position that mates with the forming surface 11 to form the arc surface 110 of the battery shell 100. When two adjacent pressure blocks 31 mate with the spherical forming surface 11 to press the arc surface 110, the pressing surface 314 of the outer pressure block 31 first reaches the position that mates with the forming surface 11. During further pressing, the outer pressure block 31 presses the blank 200 tightly, and the pressing surface 314 of the inner pressure block 31 further presses the blank 200, causing the blank 200 to stretch and deform until the inner pressure block 31 reaches the position that mates with the forming surface 11.

[0027] After the arc surface 110 of the battery casing 100 is processed, the third drive device drives the curved punch 60 to press down into the stretching hole 12, and the punch head 62 punches the protrusion 120 at the arc apex of the arc surface 110. After the stamping of the battery casing 100 is completed, the third drive device, the second drive device, and the first drive device sequentially drive the curved punch 60, the upper template 50, and the positioning sleeve 20 to lift back to their original positions.

[0028] In addition, to ensure the stamping effect, a water-based extreme pressure lubricant specifically for cold stamping of titanium alloy, TA1, is used during the stamping process to balance the lubrication effect and the chemical stability of the titanium material.

[0029] The beneficial effects of this utility model of cold precision stamping die for the TA1 titanium alloy battery shell of new energy vehicles are as follows: By setting a curved die 10, a layered pressing group 30 and a pressing ring 40, the curved die 10 is provided with a spherical forming surface 11. The layered pressing group 30 includes a plurality of pressing blocks 31. The pressing blocks 31 adopt a radial layered nested structure. When two adjacent pressing blocks 31 cooperate with the spherical forming surface 11 to stamp the arc surface 110, the outer pressing block 31 first reaches the position to cooperate with the forming surface 11. When further pressed down, the outer pressing block 31 presses the blank 200, and the inner pressing block 31 further presses the blank 200. During the stamping process of the arc surface 110, multiple pressing blocks 31 respectively press different sections of the arc surface 110, thereby effectively preventing damage to the battery shell 100 and improving the product qualification rate and economic benefits of the enterprise.

Claims

1. A cold precision stamping die for a TA1 titanium alloy battery casing for new energy vehicles, characterized in that, The device includes a curved die, a layered blank holder assembly, a positioning sleeve, a blank holder ring, and an upper template. The curved die is located below the positioning sleeve. The layered blank holder assembly is mounted on the positioning sleeve and extends from the bottom of the positioning sleeve. The blank holder ring is mounted on the positioning sleeve and extends from the top of the positioning sleeve, and the blank holder ring has elastic deformation properties. The upper template is located above the positioning sleeve. The upper end face of the curved die has a concave forming surface, which is spherically shaped. The layered blank holder assembly includes several blank holder blocks, which are arranged in a radially layered nested structure. Each layer of blank holder blocks is concentrically distributed along the central axis. The bottom of each blank holder block also has a pressing surface, the curvature of which corresponds to the curvature of the forming surface in the vertical direction. When two adjacent blank holders are pressed into an arc-shaped surface in conjunction with the spherical forming surface, the outer blank holder first reaches the position to cooperate with the forming surface. When pressed further down, the outer blank holder presses the blank, and the inner blank holder further presses the TA1 titanium alloy blank. During the pressing process of the arc-shaped surface, multiple blank holders press different sections of the arc-shaped surface respectively.

2. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 1, characterized in that, It also includes a curved punch, which passes through the upper template, the pressure ring, and the layered pressure group. The curved die is further provided with a downward-through stretching hole at the bottom of the forming surface.

3. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 2, characterized in that, The opening of the stretching hole and the forming surface have a smooth curve transition.

4. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 2, characterized in that, It also includes drive device one, drive device two and drive device three. Drive device one, drive device two and drive device three respectively drive the positioning sleeve, upper template and curved punch to adjust in the vertical direction. When drive device three drives the curved punch to adjust, the curved punch can be further extended into the stretching hole of the curved die or withdrawn from the stretching hole of the curved die.

5. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 2, characterized in that, The pressing ring has a through hole in the middle, the upper template has a through hole in the middle, and the innermost pressing block has a clearance hole in the middle. The through hole, through hole, clearance hole and stretching hole are aligned with each other in the vertical direction. The curved punch passes through the through hole and through hole in sequence and extends into the clearance hole.

6. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 1, characterized in that, Between two adjacent pressing blocks of the layered pressing group, the outer pressing block is provided with an L-shaped stepped surface, which is used to limit the inner pressing block.

7. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 1, characterized in that, The positioning sleeve is hollow in shape and has a functional hole. The functional hole penetrates the positioning sleeve along the main axis. The pressing block of the layered pressing group extends out from the opening below the functional hole. The pressing ring is inserted into the functional hole from above and extends out from the opening of the functional hole.

8. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 7, characterized in that, The outermost pressing block of the layered pressing group is installed on the positioning sleeve.

9. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 8, characterized in that, The positioning sleeve has a protruding rib on the wall of the functional hole, and a slot is provided on the outer side of the outermost pressing block. The protruding rib on the positioning sleeve is inserted into the slot of the outermost pressing block.

10. The cold precision stamping die for the TA1 titanium alloy battery casing of new energy vehicles according to claim 7, characterized in that, The pressure ring is a rubber block.

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