Negative plate flanging and shaping equipment and flanging method

Abstract

The invention relates to a negative plate flanging and shaping device and a flanging method, the negative plate flanging and shaping device comprises a flanging mechanism, the flanging mechanism comprises a flanging lower die and a liftable flanging upper die, the lower side of the flanging upper die is provided with a die assembly notch, the groove bottom of the upper side of the die assembly notch is provided with a press fitting notch, and the press fitting notch is provided with a press fitting groove. The press-fitting notch is in a flaring shape, the groove wall of the press-fitting notch forms a flanging inclined face, the flanging lower die comprises a die core, a positioning ring and a base, the positioning ring is arranged in the base in a floating mode, the die core is arranged in the positioning ring, the lower end of the die core abuts against the base, and a flanging containing groove is formed in the portion, higher than the die core, of the upper end of the positioning ring. According to the negative plate flanging device, flanging operation in negative plate production can be achieved only through one-time press fitting, the operation efficiency is greatly improved, the operation quality can be guaranteed, and meanwhile the structure is greatly simplified.

Description

Technical Field

[0001] The invention relates to the field of thermal battery production, in particular to a negative electrode sheet flanging shaping device and a flanging method. Background Art

[0002] Thermal battery is a heat-activated primary reserve battery, which includes multiple single cells. A single cell structure in the prior art includes a negative electrode sheet, a separator and a positive electrode sheet, which form a structure similar to a sandwich biscuit. In the production process of the negative electrode sheet, the new production process is to put the alloy sheet containing lithium into a cup-shaped nickel sheet or other metal sheet, and then turn the vertical edge of the cup-shaped sheet inward and pressurize and flatten it, finally forming a complete negative electrode sheet.

[0003] However, in the prior art, the production process of this negative electrode sheet is entirely completed by manual operation, especially the loading and unloading parts require manual operation. However, since the alloy containing lithium is a flammable alloy, manual operation poses a great threat to the safety of workers. In addition, during the operation, manual contact will also cause corrosion to the lithium alloy and ultimately affect the quality of the negative electrode sheet, and ultimately affect the current stability when the thermal battery is working. In addition, the efficiency of manual operation is also extremely low.

[0004] The patent of CN109940075B discloses an automatic device for flanging negative electrode sheets, wherein the flanging mechanism includes a micro guide rail, a sliding block, a sheet pressing mechanism, a flanging block and other structures, wherein the guide rail mounting plate is connected to the lifting and rotating mechanism, the micro guide rail is mounted on the guide rail mounting plate, two sliding blocks are mounted on the micro guide rail, the two sliding blocks are respectively hinged to the transmission rod through a connecting rod, the sheet pressing mechanism is connected to the guide rail mounting plate and is located between the two sliding blocks, when the transmission rod slides up and down, the distance between the two sliding blocks is changed by two connecting rods, and the flanging block is arranged at the end of the sliding block. When the flanging mechanism is working, the sliding block is first driven by the transmission rod to extend and retract to a distance matching the diameter of the LiB alloy sheet and the nickel sheet and then stops, and then the rotating motor drives the synchronous wheel to rotate through the synchronous belt, thereby driving the entire flanging mechanism to rotate, and after rotating 1.5 circles, the flanging block turns the nickel sheet inward. The structure of the above mechanism is relatively complex, and the operation is also relatively cumbersome, and the formed product is prone to wrinkles at the starting rotation point of the flanging mechanism and the rotation point after the end, which affects the product quality. Summary of the invention

[0005] The object of the present invention is to provide a negative electrode plate flanging shaping device and a flanging method, which can realize the flanging operation in the production of negative electrode plates by only one pressing, greatly improving the operation efficiency, ensuring the operation quality, and greatly simplifying the structure.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A negative electrode plate flanging shaping device comprises a flanging mechanism, and the flanging mechanism comprises a flanging lower mold and a liftable flanging upper mold, wherein the flanging upper mold is provided with a mold closing notch on the lower side, and a press-fitting notch is provided at the groove bottom on the upper side of the mold closing notch, the press-fitting notch is flared and the groove wall forms a flanging slope, the flanging lower mold comprises a mold core, a positioning ring and a base, wherein the positioning ring is floatingly arranged in the base, the mold core is arranged in the positioning ring and the lower end is abutted against the base, and the upper end of the positioning ring is higher than the mold core to form a flanging accommodating groove.

[0008] The positioning ring includes a collar portion and a flange portion arranged on the outer side of the lower end of the collar portion, wherein the mold groove of the upper mold of the flanging is placed on the collar portion, the mold core is arranged in the collar portion, and the base includes a raised portion in the middle and a floating cavity arranged on the outer side of the raised portion, wherein the lower end of the mold core abuts against the upper end of the raised portion, a guide pin is provided on the flange portion, and the lower end of the guide pin is fixedly connected to the bottom of the floating cavity, a spring is sleeved on the guide pin, and the upper end of the spring abuts against the lower side of the flange portion, and the lower end abuts against the bottom of the floating cavity.

[0009] An outer inclined guide surface is arranged at the lower end of the groove wall of the mold closing groove, and an inner inclined guide surface is arranged at the upper end of the collar portion.

[0010] The outer wall height of the floating cavity of the base is higher than the height of the protruding portion and forms a limiting guide wall. The outer edge of the flange portion of the positioning ring is provided with a sliding positioning surface, and the sliding positioning surface contacts the limiting guide wall.

[0011] The base is driven to rise and fall by a lifting drive device, which includes a cylinder and a zero-point positioning chuck. The zero-point positioning chuck is driven to rise and fall by the cylinder, and a positioning pin is provided on the lower side of the base to connect with the zero-point positioning chuck.

[0012] The material that has completed the flanging operation in the flanging mechanism is transferred to the shaping mechanism through the material transfer mechanism.

[0013] The shaping mechanism includes a shaping lower mold and a lifting shaping upper mold. A shaping groove is provided on the upper side of the shaping lower mold, and a plurality of air outlet holes are provided at the bottom of the shaping groove. A gas channel is provided inside the shaping lower mold, and the rear end of the gas channel is connected to an air inlet provided on one side of the shaping lower mold. A plurality of branch air channels are provided at the front of the gas channel, and the branch air channels are respectively connected to the corresponding air outlet holes. The lower side of the shaping upper mold is flat.

[0014] The material transfer mechanism comprises a vacuum suction cup with three degrees of freedom of movement in the X, Y and Z directions.

[0015] The upper flanging mold can be raised and lowered in a frame, a rotating table is provided inside the frame, and each lower flanging mold is respectively provided in a corresponding mounting opening on the rotating table, a loading robot and a material grabbing visual positioning system are provided on the input side of the frame, and a mold visual positioning system is provided on the upper end of the frame.

[0016] A flanging method according to the negative electrode sheet flanging shaping equipment, specifically: the cup-shaped disc is first placed in the flanging accommodating groove, then the alloy disc is placed in the cup-shaped disc, then the flanging upper mold descends and the lower mold groove is placed on the positioning ring of the flanging lower mold, then the flanging upper mold continues to descend and the flanging slope of the press-fitting groove edge is used to complete the flanging operation of the cup body edge of the cup-shaped disc.

[0017] The advantages and positive effects of the present invention are:

[0018] 1. The present invention can realize the flanging operation in the production of negative plates by only one press assembly, which greatly improves the operation efficiency and can ensure the operation quality compared with the prior art (such as CN109940075B patent).

[0019] 2. The present invention only needs one press to complete the operation, so the overall structure of the mechanism is greatly simplified, making the overall structure of the equipment more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the production line structure using the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the die on the middle flange.

[0022] Figure 3 for Figure 1 Schematic diagram of the structure of the lower die of the middle flanging.

[0023] Figure 4 for Figure 3 Schematic diagram of the structure of the positioning ring.

[0024] Figure 5 for Figure 1 The structural diagram of the lifting drive device.

[0025] Figure 6 for Figure 1 Schematic diagram of the structure of the medium shaping mold.

[0026] Figure 7 for Figure 1 The structural diagram of the material transfer mechanism in

[0027] Figure 8 It is a schematic diagram of the structure of the alloy disc and cup-shaped disc targeted by the present invention,

[0028] Fig. 9 for Figure 8 Schematic diagram of the flanging of a medium cup disc Figure 1 ,

[0029] Fig.10 for Figure 8 Schematic diagram of the flanging of a medium cup disc Figure 2 ,

[0030] Fig.11 for Figure 8 Schematic diagram of the flanging of a medium cup disc Figure 3 ,

[0031] Fig.12 for Figure 1 Schematic diagram of the state of placing the cup-shaped disc and the alloy disc in the lower die of the middle flange.

[0032] Fig.13 for Figure 1 Schematic diagram of the matching status of the middle flange upper die and the flange lower die.

[0033] Among them, 1 is a feeding robot, 2 is a mold visual positioning system, 3 is a material grabbing visual positioning system, 4 is a flanging upper mold, 401 is a flanging slope, 402 is a mold notch, 403 is an outer inclined guide surface, 5 is a flanging lower mold, 501 is a mold core, 5011 is the lower end of the mold core edge, 502 is a positioning ring, 5021 is a flange part, 5022 is an inner inclined guide surface, 5023 is a collar part, 5024 is a sliding positioning surface, 5025 is a positioning inner circular surface, 503 is a guide pin, 504 is a spring, 505 is a base, 5051 is a floating cavity, 5052 is a raised part, 5053 is a limiting guide wall, 506 is a positioning rivet, 507 is a flanging accommodating groove, 6 is Lifting drive device, 601 is a cylinder, 602 is a zero-point positioning chuck, 7 is a shaping mechanism, 701 is a shaping upper mold, 702 is a shaping lower mold, 7021 is a shaping groove, 7022 is an air outlet, 7023 is an air inlet, 8 is a material transfer mechanism, 801 is a bracket, 802 is a Z-axis linear module, 803 is a Y-axis linear module, 804 is a suction cup bracket, 805 is a suction cup extension rod, 806 is an X-axis linear module, 807 is a vacuum suction cup, 9 is a finished product inspection system, 10 is a plastic packaging robot, 11 is a plastic packaging machine, 12 is a frame, 1201 is a rotating table, 1202 is a mounting frame, 13 is an alloy disc, 14 is a cup-shaped disc, and 1401 is the edge of the cup body. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] like Figures 1 to 13 As shown, the present invention includes a flanging mechanism, and as Figures 2 to 4and Figures 12-13 As shown, the flanging mechanism includes a flanging lower mold 5 and a liftable flanging upper mold 4, wherein Figure 2 As shown, the lower side of the upper flanging mold 4 is provided with a mold closing slot 402, and the upper groove bottom of the mold closing slot 402 is provided with a press-fitting slot, the press-fitting slot is flared and the groove wall forms a flanging slope 401, as shown in FIG. Figure 3 As shown, the flanging lower mold 5 includes a mold core 501, a positioning ring 502 and a base 505, wherein the positioning ring 502 is floatingly arranged in the base 505, the mold core 501 is arranged in the positioning ring 502 and the lower end is against the base 505, and the upper end of the positioning ring 502 is higher than the mold core 501 to form a flanging accommodating groove 507. Figures 12-13 As shown, when the present invention is working, the cup-shaped disc 14 is first placed in the flange receiving groove 507, and then the alloy disc 13 is placed in the cup-shaped disc 14, and then the upper flanging mold 4 descends and the lower mold notch 402 is placed on the positioning ring 502 of the lower flanging mold 5, and then the upper flanging mold 4 continues to descend and uses the flanging slope 401 of the press-fitting notch edge to complete the flanging operation of the cup body edge 1401 of the cup-shaped disc 14.

[0036] like Figures 2-3 and Figures 12-13 As shown, in this embodiment, the positioning ring 502 includes a collar portion 5023 and a flange portion 5021 arranged on the outer side of the lower end of the collar portion 5023, wherein the mold notch 402 of the upper flanging mold 4 is sleeved on the collar portion 5023, the mold core 501 is arranged in the collar portion 5023, the base 505 includes a raised portion 5052 in the middle and a floating cavity 5051 arranged on the outer side of the raised portion 5052, wherein the lower end 5011 of the core edge of the mold core 501 is abutted against the upper end of the raised portion 5052, a guide pin 503 is arranged on the flange portion 5021 of the positioning ring 502, and the lower end of the guide pin 503 is fixedly connected to the bottom of the floating cavity 5051, and the guide pin 503 is sleeved on the A spring 504 is provided, and the upper end of the spring 504 is abutted against the lower side of the flange portion 5021, and the lower end is abutted against the bottom of the floating cavity 5051. The positioning ring 502 is floatingly supported by the spring 504. A positioning pin 506 is provided on the lower side of the base 505 and is connected to a lifting drive device 6 to achieve lifting fine-tuning. When the base 505 is lifted or lowered, the positioning ring 502 can be pulled up or down by the guide pin 503, and the mold core 501 is also lifted or lowered with the base 505. In addition, screwing the guide pin 503 can also change the compression amount of the spring 504, so that the depth of the flange accommodating groove 507 can be fine-tuned while changing the floating support force of the positioning ring 502.

[0037] like Figure 2As shown, in this embodiment, the lower end of the groove wall of the mold-matching groove 402 is provided with an outer inclined guide surface 403, such as Figure 4 As shown, the upper end of the collar portion 5023 is provided with an inner inclined guide surface 5022, and the outer inclined guide surface 403 and the inner inclined guide surface 5022 cooperate to ensure that the collar portion 5023 of the positioning ring 502 can smoothly enter the mold groove 402 on the lower side of the flanging upper mold 4.

[0038] like Figures 3-4 As shown, in this embodiment, the outer wall height of the floating cavity 5051 of the base 505 is higher than the height of the protrusion 5052 and forms a limiting guide wall 5053, and the outer edge of the flange portion 5021 of the positioning ring 502 is provided with a sliding positioning surface 5024, and the sliding positioning surface 5024 is in contact with the limiting guide wall 5053 to ensure that the positioning ring 502 floats vertically.

[0039] like Figure 4 As shown, the inner hole wall of the collar portion 5023 forms a positioning inner circular surface 5025, and as shown Figure 3 As shown, the mold core 501 is positioned in the positioning inner circular surface 5025, and the positioning inner circular surface 5025 ensures that the mold core 501 can be lifted and lowered vertically.

[0040] like Figure 5 As shown, in this embodiment, the lifting drive device 6 includes a cylinder 601 and a zero-point positioning chuck 602 , wherein the zero-point positioning chuck 602 is driven to lift by the cylinder 601 , and the positioning pin 506 on the lower side of the base 505 is connected to the zero-point positioning chuck 602 .

[0041] like Figure 1 As shown, the present invention further comprises a material transfer mechanism 8 and a shaping mechanism 7 , wherein the material that has completed the flanging operation in the flanging mechanism is transferred to the shaping mechanism 7 through the material transfer mechanism 8 .

[0042] like Figure 6As shown, in this embodiment, the shaping mechanism 7 includes a shaping lower mold 702 and a shaping upper mold 701 that can be lifted and lowered. A shaping groove 7021 is provided on the upper side of the shaping lower mold 702, and a plurality of air outlet holes 7022 are provided at the bottom of the shaping groove 7021. A gas channel is provided inside the shaping lower mold 702, and the rear end of the gas channel is connected to an air inlet 7023 provided on one side of the shaping lower mold 702. A plurality of branch air channels are provided at the front of the gas channel, and the branch air channels are respectively connected to the corresponding air outlet holes 7022. The lower side of the shaping upper mold 701 is a complete flat plate shape. The material that has completed the flanging is first transferred to the shaping groove 7021 on the upper side of the shaping lower mold 702 through the material transfer mechanism 8, and then the shaping upper mold 701 descends to pressurize and shape the material, thereby controlling the outer diameter and surface flatness of the finished product. The shaping upper mold 701 can be driven to lift by a cylinder or other device.

[0043] like Figure 7 As shown, in this embodiment, the material transfer mechanism 8 includes an X-axis linear module 806, a Z-axis linear module 802, and a Y-axis linear module 803, wherein the Z-axis linear module 802 is arranged on the X-axis linear module 806, the Y-axis linear module 803 is arranged on the Z-axis linear module 802, and a vacuum suction cup 807 is arranged at the end of the Y-axis linear module 803 for adsorbing materials, and then the vacuum suction cup 807 is driven by the above-mentioned linear module to realize the movement adjustment of three degrees of freedom in the X, Y, and Z directions until the vacuum suction cup 807 moves to the upper side of the shaping groove 7021 and releases the material to enter the shaping groove 7021. Each of the linear modules is a well-known technology in the art, for example, the linear module structure in the CN109940075B patent can be adopted.

[0044] like Figure 1 As shown, in this embodiment, the flanging upper mold 4 can be raised and lowered in a frame 12, wherein a mold lifting drive device is provided on the mounting frame 1202 inside the frame 12, and the flanging upper mold 4 is driven to rise and fall by the corresponding mold lifting drive device, a rotating table 1201 is provided inside the frame 12, and each flanging lower mold 5 is respectively provided in a corresponding mounting opening on the rotating table 1201, which is a well-known technology in the art, for example, the rotating table structure in the CN109940075B patent can be adopted.

[0045] like Figure 1As shown, in this embodiment, a loading robot 1 and a material grabbing visual positioning system 3 are provided on the input side of the frame 12, and a mold visual positioning system 2 is provided on the upper end of the frame 12. The above structure is used to realize automatic material loading and accurate material positioning. The loading robot 1, the material grabbing visual positioning system 3, and the mold visual positioning system 2 are all commercially available products, wherein the loading robot 1 is a four-axis robot of the Zhongweixing 4215 model, and the material grabbing visual positioning system 3 and the mold visual positioning system 2 are both Hikvision Vision VC6500 systems.

[0046] like Figure 1 As shown, in this embodiment, material transfer mechanisms 8 are provided on both sides of the shaping mechanism 7. In addition, a finished product detection system 9, a plastic sealing robot 10 and a plastic sealing machine 11 are provided in sequence on the output side of the shaping mechanism 7 along the material transmission direction. The finished product detection system 9, the plastic sealing robot 10 and the plastic sealing machine 11 are all commercially available products, among which the finished product detection system 9 is the Hikvision VC6500 system, and the plastic sealing machine 11 is the Deli 14891 model plastic sealing machine.

[0047] The working principle of the present invention is:

[0048] like Figures 8 to 11 As shown, the materials targeted by the present invention include alloy discs 13 and cup-shaped discs 14, wherein the alloy discs 13 are lithium alloy discs, and the cup-shaped discs 14 are nickel discs. During the production process of the negative electrode sheet, the alloy discs 13 need to be placed in the cup-shaped discs 14, and then the cup body edge 1401 of the cup-shaped disc 14 is turned inward and finally the alloy discs 13 are pressed.

[0049] like Figure 1 and Figures 12-13 As shown, when the present invention is working, the feeding robot 1 first puts the cup-shaped disc 14 into the flanging accommodating groove 507 formed by the mold core 501 and the positioning ring 502 on the upper side of the flanging lower mold 5, and then puts the alloy disc 13 into the cup-shaped disc 14, and then the flanging upper mold 4 descends and sets the lower side mold notch 402 on the positioning ring 502 of the flanging lower mold 5, and then the flanging upper mold 4 continues to descend and uses the flanging slope 401 of the edge of the press-fitting notch to complete the flanging operation of the cup body edge 1401 of the cup-shaped disc 14, and at the same time, the base 505 of the flanging lower mold 5 can be lifted and lowered according to actual needs to ensure the quality of the flanging operation. The present invention can realize the flanging operation in the production of negative plates by only one press-fitting, which greatly improves the operation efficiency, can ensure the operation quality, and greatly simplifies the structure.

Claims

1. A negative electrode sheet flanging shaping device, characterized in that: The invention comprises a flanging mechanism, and the flanging mechanism comprises a flanging lower mold (5) and a liftable flanging upper mold (4), wherein the flanging upper mold (4) is provided with a mold closing slot (402) at the lower side, and a press-fitting slot is provided at the bottom of the upper side of the mold closing slot (402), wherein the press-fitting slot is flared and the slot wall forms a flanging inclined surface (401), and the flanging lower mold (5) comprises a mold core (501), a positioning ring (502) and a base (505), wherein the positioning ring (502) is floatingly arranged in the base (505), the mold core (501) is arranged in the positioning ring (502) and the lower end is against the base (505), and the upper end of the positioning ring (502) is higher than the mold core (501) to form a flanging accommodating groove (507).

2. The negative electrode sheet flanging shaping equipment according to claim 1, characterized in that: The positioning ring (502) comprises a collar portion (5023) and a flange portion (5021) arranged on the outer side of the lower end of the collar portion (5023), wherein the mold notch (402) of the upper flanging mold (4) is sleeved on the collar portion (5023), the mold core (501) is arranged in the collar portion (5023), and the base (505) comprises a raised portion (5052) in the middle and a floating cavity (5051) arranged on the outer side of the raised portion (5052). ), wherein the lower end of the mold core (501) abuts against the upper end of the protruding portion (5052), a guide pin (503) is provided on the flange portion (5021), and the lower end of the guide pin (503) is fixedly connected to the bottom of the floating cavity (5051), a spring (504) is sleeved on the guide pin (503), and the upper end of the spring (504) abuts against the lower side of the flange portion (5021), and the lower end abuts against the bottom of the floating cavity (5051).

3. The negative electrode sheet flanging shaping equipment according to claim 2, characterized in that: An outer inclined guide surface (403) is provided at the lower end of the groove wall of the mold-matching groove (402), and an inner inclined guide surface (5022) is provided at the upper end of the collar portion (5023).

4. The negative electrode sheet flanging shaping equipment according to claim 2, characterized in that: The outer wall height of the floating cavity (5051) of the base (505) is higher than the height of the protruding portion (5052) and forms a limiting guide wall (5053); the outer edge of the flange portion (5021) of the positioning ring (502) is provided with a sliding positioning surface (5024), and the sliding positioning surface (5024) is in contact with the limiting guide wall (5053).

5. The negative electrode sheet flanging shaping equipment according to claim 1, characterized in that: The base (505) is driven to rise and fall by a lifting drive device (6), wherein the lifting drive device (6) comprises a cylinder (601) and a zero-point positioning chuck (602), wherein the zero-point positioning chuck (602) is driven to rise and fall by the cylinder (601), and a positioning pin (506) is provided on the lower side of the base (505) and is connected to the zero-point positioning chuck (602).

6. The negative electrode sheet flanging shaping equipment according to claim 1, characterized in that: The material that has completed the flanging operation in the flanging mechanism is transferred to the shaping mechanism (7) through the material transfer mechanism (8).

7. The negative electrode sheet flanging shaping equipment according to claim 6, characterized in that: The shaping mechanism (7) comprises a shaping lower mold (702) and a removable shaping upper mold (701), the upper side of the shaping lower mold (702) is provided with a shaping groove (7021), and the bottom of the shaping groove (7021) is provided with a plurality of air outlet holes (7022), a gas channel is provided inside the shaping lower mold (702), and the rear end of the gas channel is connected to an air inlet (7023) provided on one side of the shaping lower mold (702), a plurality of branch air channels are provided at the front of the gas channel, and the branch air channels are respectively connected to the corresponding air outlet holes (7022), and the lower side of the shaping upper mold (701) is flat.

8. The negative electrode sheet flanging shaping equipment according to claim 6, characterized in that: The material transfer mechanism (8) comprises a vacuum suction cup (807) having three degrees of freedom of movement in the X, Y and Z directions.

9. The negative electrode sheet flanging shaping device according to claim 6, characterized in that: The flanging upper mold (4) is movably arranged in a frame (12); a rotating table (1201) is arranged inside the frame (12); and each flanging lower mold (5) is arranged in a corresponding mounting opening on the rotating table (1201); a loading robot (1) and a material grabbing visual positioning system (3) are arranged on the input side of the frame (12); and a mold visual positioning system (2) is arranged at the upper end of the frame (12).

10. A flanging method for the negative electrode sheet flanging shaping device according to claim 1, characterized in that: The cup-shaped disc (14) is first placed in the flange receiving groove (507), and then the alloy disc (13) is placed in the cup-shaped disc (14). Then the upper flanging mold (4) descends and the lower mold notch (402) is placed on the positioning ring (502) of the lower flanging mold (5). Then the upper flanging mold (4) continues to descend and uses the flanging slope (401) of the press-fitting notch edge to complete the flanging operation of the cup body edge (1401) of the cup-shaped disc (14).

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