An automatic forming production line for a square energy storage battery case

Abstract

The present invention relates to an automatic forming production line for square energy storage battery cases, which includes a vibration grinding and saponification feeding unit arranged in sequence according to the process for polishing and orderly conveying raw aluminum plates, a vertical extrusion forming unit for extruding the polished raw aluminum plates into square shell blanks, a gradually thinned stretching unit for gradually thinning and stretching the formed blanks of the battery cases, a shell mouth forming and trimming unit for shaping and trimming the battery cases, and a cleaning and drying unit for cleaning and drying the battery cases; the vibration grinding and saponification feeding unit is arranged close to the vertical extrusion forming unit, an extrusion and stretching inter-process conveyor belt group is provided between the vertical extrusion forming unit and the gradually thinned stretching unit, a stretching and shaping inter-process conveyor belt is provided between the gradually thinned stretching unit and the shell mouth forming and trimming unit, and a trimming and cleaning inter-process conveyor belt is provided between the shell mouth forming and trimming unit and the cleaning and drying unit. The present invention greatly improves the production efficiency, improves the production quality and reduces the production cost at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of the production of square energy storage battery cases, and particularly relates to an automatic forming production line for square energy storage battery cases. Background Art

[0002] At present, the existing production line for square energy storage battery cases performs deep drawing forming in sequence from the front to the back at a large press station. Its efficiency is low and it is difficult to meet the current high-intensity and high-efficiency production requirements. Moreover, the raw materials of this method are basically in the form of round sheets, and the material utilization rate is low. Therefore, the existing technology is difficult to meet the production requirements of high material utilization rate, high qualification rate, and high efficiency. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the present invention provides an automatic forming production line for square energy storage battery cases, which solves the problems of low production efficiency caused by the traditional method of transferring and deep drawing forming inside the inner die of the press and low material utilization rate of replacing traditional round sheet raw materials with square raw materials in the form of gradually decreasing the size of a die orifice.

[0004] An automatic forming production line for square energy storage battery cases includes a vibration grinding and saponification feeding unit arranged in sequence according to the process for polishing and orderly conveying the raw material aluminum plate, a vertical extrusion forming unit for extruding the polished raw material aluminum plate into a square shell blank, a gradually thinning stretching unit for gradually thinning and stretching the formed blank of the battery case, a shell orifice forming and trimming unit for shaping and trimming the battery case, and a cleaning and drying unit for cleaning and drying the battery case. The vibration grinding and saponification feeding unit is arranged close to the vertical extrusion forming unit. An extrusion and stretching inter-sequence conveyor belt group is provided between the vertical extrusion forming unit and the gradually thinning stretching unit. The extrusion and stretching inter-sequence conveyor belt group includes an extrusion product conveyor, an extrusion shape detection CCD, a defective product pushing cylinder, a defective product discharging conveyor, a controller, and a control cabinet electrically connected to the controller. The extrusion shape detection CCD is electrically connected to the controller, and the defective product pushing cylinder is electrically connected to the control cabinet. The extrusion shape detection CCD and the defective product pushing cylinder are installed at the conveying end of the extrusion product conveyor, and the extrusion shape detection CCD is close to the conveying starting end. The defective product discharging conveyor is arranged on one side of the extrusion product conveyor and corresponds to the defective product pushing cylinder. A stretching and shaping inter-sequence conveyor belt is provided between the gradually thinning stretching unit and the shell orifice forming and trimming unit, and a trimming and cleaning inter-sequence conveyor belt is provided between the shell orifice forming and trimming unit and the cleaning and drying unit.

[0005] The vibration grinding and saponification feeding unit includes a vibration grinding machine and a discharging belt conveyor, and the sieve opening at the end of the vibration grinding machine is located at the conveying starting end of the discharging belt conveyor.

[0006] The vibration grinding and saponification feeding unit includes three polishing and saponification feeding stations, with a total of three sets of vibration grinding machines and a discharge belt conveyor.

[0007] The vertical extrusion forming unit includes a toggle press and corresponding extrusion forming dies for extruding square shell blanks, and a three-dimensional multi-station manipulator. The three-dimensional multi-station manipulator passes through the bottom of the toggle press, and the end is corresponding to the extrusion product conveyor of the extrusion and stretching sequence transfer belt group, and the other end is close to the discharge belt conveyor. The three-dimensional multi-station manipulator includes a material vacuum picking mechanism for picking up raw material aluminum plates, a flat material drag hand, a 90° turning clamp for formed materials, a drag hand support arm, a moving arm drive mechanism, and a moving arm follower mechanism. The flat material drag hand is fixed on the drag hand support arm, and both ends of the drag hand support arm are respectively connected to the moving arm drive mechanism and the moving arm follower mechanism. The 90° turning clamp for formed materials includes a gear-rack mechanism fixed on the drag hand support arm.

[0008] The vertical extrusion forming unit includes three extrusion forming stations.

[0009] The gradually thinning stretching unit includes a horizontal punching machine and corresponding gradually stretching dies, a ramp conveyor, a transverse moving plane conveyor, and a 90° turning conveyor for battery cases. The gradually stretching die includes a lower template, an upper template, and a die holder arranged between the upper template and the lower template. Multiple concentric square die openings with gradually decreasing sizes are provided on the die holder. The conveying end of the ramp conveyor corresponds to the material receiving station of the gradually stretching die. The output end after stretching of the gradually stretching die is located above the transverse moving plane conveyor. The 90° turning conveyor for battery cases is located at the conveying end of the transverse moving plane conveyor. The 90° turning conveyor for battery cases includes a plane conveyor, a battery case aggregate bin, and a pneumatic 90° turning mechanism. The battery case aggregate bin is fixed on the plane conveyor, and the plane conveyor is fixed on the turning plate of the pneumatic 90° turning mechanism. The entrance of the battery case aggregate bin corresponds to the conveying end of the transverse moving plane conveyor, and a photoelectric sensor is arranged in the battery case aggregate bin. The plane conveyor corresponds to the transfer belt between the stretching and shaping sequences.

[0010] The gradually stretching die includes 3 - 5 concentric square die openings, and the die openings are made of hard alloy steel.

[0011] The shell mouth forming and trimming unit includes a two-dimensional pick-and-place manipulator 1, a mechanical eccentric shaping press and a corresponding shaping die, a two-dimensional pick-and-place manipulator 2, a mechanical eccentric trimming press and a corresponding rotary cutting die, and a two-dimensional pick-and-place manipulator 3 arranged in sequence; the two-dimensional pick-and-place manipulator 1, the two-dimensional pick-and-place manipulator 2, and the two-dimensional pick-and-place manipulator 3 have the same structure and are all commercially available two-dimensional manipulators; the shaping die includes an upper template, a lower template, a shaping female die connected to the upper template, a knockout plate, a guide plate, a wedge block, and a punch connected to the lower template.

[0012] The shell mouth forming and trimming unit includes two shaping and trimming stations.

[0013] The cleaning and drying unit includes an ultrasonic cleaning and drying integrated machine, and the inlet of the ultrasonic cleaning and drying integrated machine corresponds to the end of the trimming and cleaning inter-stage conveyor belt.

[0014] The beneficial effects of the present invention are as follows: Through the cooperation of manipulators and conveying devices among the various units of the present invention, fully automated loading and unloading, polishing, saponification, extrusion, tapered stretching, shaping, trimming, cleaning, and drying are realized. Based on the production efficiency of the tapered thinning stretching machine, the number of equipment of other units is proportioned, enabling efficient fully automated production among the equipment and various units. By controlling the key production links and optimizing the production rhythm, the production efficiency is greatly improved, excessive manual intervention is avoided, the production quality is improved, and the production cost is reduced. The estimated production rhythm provided by the production line layout of the present invention is 90 pieces per minute. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the automatic forming production line of the square energy storage battery case provided by the embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of the vibration grinding and saponification feeding unit in the present invention;

[0017] Figure 3 It is a schematic diagram of the vertical extrusion forming unit in the present invention;

[0018] Figure 4 It is a schematic diagram of the tapered thinning stretching unit in the present invention;

[0019] Figure 5 It is a schematic diagram of the shell mouth forming and trimming unit in the present invention;

[0020] Figure 6 It is a schematic diagram of the cleaning and drying unit in the present invention;

[0021] Figure 7 It is a schematic diagram of the three-dimensional multi-station manipulator of the vertical extrusion forming unit in the present invention;

[0022] Figure 8 Schematic diagram of the gradient stretching die of the gradient thinning stretching unit in the present invention;

[0023] Figure 9 Schematic diagram of the shaping die in the shell mouth forming and trimming unit of the present invention;

[0024] Figure 10 Schematic diagram of the conveying belt group between the extrusion and stretching processes in the present utility model;

[0025] Among them,

[0026] 1 - vibration grinding and saponification feeding unit, 2 - vertical extrusion forming unit, 3 - gradient thinning stretching unit, 4 - shell mouth forming and trimming unit, 5 - cleaning and drying unit, 6 - conveying belt group between the extrusion and stretching processes, 61 - extruded product conveyor, 62 - CCD for detecting the extrusion shape, 63 - defective product ejection cylinder, 64 - defective product discharge conveyor, 7 - conveying belt between the stretching and shaping processes, 8 - conveying belt between the trimming and cleaning processes, 11 - vibration grinding machine, 12 - discharge belt conveyor, 21 - toggle press, 22 - extrusion forming die, 23 - three - dimensional multi - station manipulator, 231 - material vacuum picking mechanism, 232 - flat material drag hand, 233 - forming material 90° flipping gripper, 234 - drag hand support arm, 235 - moving arm drive mechanism, 236 - moving arm follower mechanism, 31 - horizontal punching machine, 32 - gradient stretching die, 321 - lower template, 322 - die base, 323 - die orifice, 324 - upper template, 33 - ramp conveyor, 34 - horizontal transfer plane conveyor, 35 - battery shell 90° flipping conveyor, 351 - plane conveyor, 352 - battery shell aggregate bin, 353 - pneumatic 90° flipping mechanism, 41 - two - dimensional pick - and - place manipulator one, 42 - mechanical eccentric shaping press, 43 - shaping die, 431 - upper template, 432 - shaping female die, 433 - ejector plate, 434 - punch, 435 - wedge block, 436 lower template, 437 - guide plate, 44 - two - dimensional pick - and - place manipulator two, 45 - mechanical eccentric trimming press, 46 - rotary cutting die, 47 - two - dimensional pick - and - place manipulator three, 51 - ultrasonic cleaning and drying integrated machine. Specific embodiments

[0027] In order to better explain the present invention for easy understanding, the technical solutions and effects of the present invention will be described in detail below with reference to the accompanying drawings through specific embodiments.

[0028] Such as Figure 1As shown in the figure, an automatic forming production line for a square energy storage battery case includes a vibration grinding and saponification feeding unit 1, a vertical extrusion forming unit 2, a gradually thinned stretching unit 3, a case mouth forming and trimming unit 4, and a cleaning and drying unit 5 arranged in sequence according to the process, constituting a necessary production process. The vibration grinding and saponification feeding unit 1 is arranged close to the vertical extrusion forming unit 2. An extrusion and stretching intermediate transfer belt group 6 is provided between the vertical extrusion forming unit 2 and the gradually thinned stretching unit 3. A stretching and shaping intermediate transfer belt 7 is provided between the gradually thinned stretching unit 3 and the case mouth forming and trimming unit 4. A trimming and cleaning intermediate transfer belt 8 is provided between the case mouth forming and trimming unit 4 and the cleaning and drying unit 5.

[0029] As Figure 2 shown, the vibration grinding and saponification feeding unit 1 is used to polish the raw material aluminum plate and convey it in an orderly manner, including a vibration grinding machine 11 and a discharge belt conveyor 12. The sieve opening at the end of the vibration grinding machine 11 is located at the starting end of the conveying of the discharge belt conveyor 12. The raw material aluminum plate is manually put into the vibration grinding machine 11, and zinc stearate is put into the vibration grinding machine 11 for polishing and saponification. After completion, the material enters the discharge belt conveyor 12 through the sieve opening at the end of the vibration grinding machine 11. A shrinkage baffle mechanism is provided on the belt of the discharge belt conveyor 12. The shrinkage baffle mechanism is a baffle with multiple baffle openings gradually decreasing from the starting end of the conveying to the ending end of the conveying. The two baffles near the ending end of the conveying are parallel to the conveying direction, and the distance between the baffles is the width of the raw material aluminum plate. The discharge belt conveyor 12 makes the raw material aluminum plates form an orderly placement state at the end of the discharge belt conveyor 12 through the shrinkage baffle mechanism.

[0030] In this embodiment, the vibration grinding and saponification feeding unit 1 includes three polishing, saponification, and feeding workstations, with a total of three sets of vibration grinding machines 11 and discharge belt conveyors 12.

[0031] As Figure 3 shown, the vertical extrusion forming unit 2 is used to extrude the polished raw material aluminum plate into a square shell blank, including a toggle press 21 and a corresponding extrusion forming die 22 for extruding into a square shell blank, and a three-dimensional multi-station manipulator 23. The three-dimensional multi-station manipulator 23 passes through the bottom of the toggle press 21, and the end is corresponding to the extrusion and stretching intermediate transfer belt group 6, and the other end is close to the discharge belt conveyor 12. As Figure 7As shown in the figure, the three-dimensional multi-station manipulator 23 includes a material vacuum pickup mechanism 231 for picking up raw material aluminum plates, a flat material drag hand 232, a formed material 90° flipping gripper 233, a drag hand support arm 234, a moving arm drive mechanism 235, and a moving arm follower mechanism 236. The flat material drag hand 232 is fixed on the drag hand support arm 234, and both ends of the drag hand support arm 234 are respectively connected to the moving arm drive mechanism 235 and the moving arm follower mechanism 236. The formed material 90° flipping gripper 233 includes a rack and pinion mechanism fixed on the drag hand support arm 234. The rack is driven by a driving cylinder, and a clamping plate for clamping the material is coaxially connected to the pinion. The driving cylinder drives the rack to move forward, and the pinion meshes and rotates on the rack, driving the clamping plate to rotate, thereby realizing the 90° flipping of the formed material. The moving arm drive mechanism 235 can be driven to perform X, Y, and Z-direction movements respectively by three different motors as power. Among them, the X-direction is the length direction of the moving arm, the Y-direction is the width direction of the moving arm, and the Z-direction is the direction perpendicular to the ground. As Figure 10As shown, the conveyor belt group 6 between extrusion and stretching sequences includes an extruded product conveyor 61, an extrusion profile detection CCD 62, a defective product ejection cylinder 63, a defective product discharge conveyor 64, a controller (not shown in the figure), and a control cabinet (not shown in the figure) electrically connected to the controller. The extrusion profile detection CCD 62 is a commercially available CCD camera and is electrically connected to the controller. The defective product ejection cylinder 63 is electrically connected to the control cabinet. The extrusion profile detection CCD 62 and the defective product ejection cylinder 63 are installed at the conveying end of the extruded product conveyor 61, and the extrusion profile detection CCD 62 is close to the conveying starting end. The defective product discharge conveyor 64 is arranged on one side of the extruded product conveyor 61 and corresponds to the defective product ejection cylinder 63. The drag hand support arm 234 in the three-dimensional multi-station manipulator 23 is initially in a left-right open state. The material vacuum pickup mechanism 231 sucks and lifts the orderly raw material aluminum plates at the conveying end of the discharge belt conveyor 12 to a position where the bottom surface of the raw material aluminum plate is higher than the top surface of the flat material drag hand 232. The drag hand support arm 234 is driven by the Y-axis motor of the moving arm drive mechanism 235, and the two arms are closed inward. The forming material 90° flipping clamp 233 on both sides of the extrusion forming die 22 clamps the square shell blank formed by the previous raw material aluminum plate that has been moved to the extrusion forming die 22 for extrusion. The material vacuum pickup mechanism 231 releases the vacuum, and the raw material aluminum plate falls onto the top surface of the flat material drag hand 232. At the same time, the Z-axis motor of the moving arm drive mechanism 235 works to separate the previously extruded square shell blank from the lower die of the extrusion forming die 22. The driving cylinder on the forming material 90° flipping clamp 233 is pushed out, and the gear meshes and rotates on the rack, driving the clamping plate to rotate, and the square shell blank completes a 90° flip. Driven by the moving arm drive mechanism 235 and the moving arm follower mechanism 236, the drag hand support arm 234 moves the next raw material aluminum plate that has just fallen onto the top surface of the flat material drag hand 232 to the extrusion forming die 22, and at the same time, also moves the square shell blank that has been flipped 90° and clamped by the forming material 90° flipping clamp 233 above the conveyor belt group 6 between extrusion and stretching sequences. The Z-axis motor of the moving arm drive mechanism 235 reverses to make the drag hand support arm 234 descend along the Z-axis, and then the drag hand support arm 234 becomes open under the reverse action of the Y-axis motor of the moving arm drive mechanism 235, and its X-axis motor reverses to make the drag hand support arm 234 return to its original position. After the toggle press 21 extrudes the raw material aluminum plate into a square shell blank body, that is, the battery shell forming blank, it enters the next extrusion forming cycle.

[0032] In this embodiment, the vertical extrusion forming unit 2 includes three extrusion forming stations, and the extruded products are conveyed backward in a combined flow through the extruded product conveyor 61 in the extrusion and stretching inter-process conveyor belt group 6. The extruded products are detected by the extrusion profile detection CCD 62 above the end of the extruded product conveyor 61. The extrusion profile detection CCD 62 transmits the captured information to the controller, which compares it with the qualified extruded products pre-set in the controller. The products judged to be good are conveyed by the extruded product conveyor 61 to the next unit. For those judged to be defective, the controller transmits the information to the control cabinet, and the control cabinet issues a working instruction to the defective product ejection cylinder 63. The defective product ejection cylinder 63 ejects the defective products to the defective product discharge conveyor 64 for waiting for manual processing.

[0033] As Figure 4 shown, the gradually thinning and stretching unit 3 is used for the gradually thinning and stretching of the battery case forming blank, and includes a horizontal punching press 31 and corresponding gradually stretching dies 32, a ramp conveyor 33, a transverse moving plane conveyor 34, and a 90° battery case flipping conveyor 35. The conveying end of the ramp conveyor 33 corresponds to the material receiving station of the gradually stretching die 32. The output end after stretching of the gradually stretching die 32 is located above the transverse moving plane conveyor 34. The 90° battery case flipping conveyor 35 is located at the conveying end of the transverse moving plane conveyor 34 to convey the battery case by 90°. The 90° battery case flipping conveyor 35 includes a plane conveyor 351, a battery case aggregate bin 352, and a pneumatic 90° flipping mechanism 353. The battery case aggregate bin 352 is fixed on the plane conveyor 351, and the plane conveyor 351 is fixed on the flipping plate of the pneumatic 90° flipping mechanism 353. The inlet of the battery case aggregate bin 352 corresponds to the conveying end of the transverse moving plane conveyor 34. A photoelectric sensor is provided in the battery case aggregate bin 352. The plane conveyor 351 corresponds to the stretching and shaping inter-process conveyor belt 7. As Figure 8As shown in the figure, the tapered stretching die 32 includes a lower template, an upper template, and a die holder disposed between the upper and lower templates. The die holder is provided with 3 to 5 concentric square die openings with gradually decreasing sizes. In this embodiment, the tapered stretching die 32 includes 3 concentric square die openings with gradually decreasing sizes. The die openings are made of hard alloy steel including YG20 and YG15. The product sequentially completes the gradual change process through the concentric die openings that gradually decrease in size, and after a set of concentric die opening stretching operations, it reaches the size required by the drawing. The ramp conveyor 33 receives the battery shell forming blanks conveyed by the conveying belt group 6 between the extrusion and stretching processes and transports them one by one to the receiving station of the horizontal punching press 31. The battery shell formed by the multi-group square die opening tapered stretching operation of the horizontal punching press 31 through the tapered stretching die 32 is transported to the battery shell aggregate bin 352 of the 90° flipping conveyor 35 by the transverse moving flat conveyor 34. After the photoelectric sensor senses that the bin is full, the pneumatic 90° flipping mechanism 353 operates to flip the battery shell aggregate bin 352 and the flat conveyor 351 by 90° so that the opening side of the battery shell faces downward. The flat conveyor 351 starts, and the battery shell is transported by the flat conveyor 351 to the conveying belt 7 between the stretching and shaping processes, and then continues to be conveyed backward.

[0034] As Figure 5 shown, the shell opening forming and trimming unit 4 is used for shaping and trimming the battery shell, and includes a two-dimensional pick-and-place manipulator one 41, a mechanical eccentric shaping press 42 and corresponding shaping dies 43, a two-dimensional pick-and-place manipulator two 44, a mechanical eccentric trimming press 45 and corresponding spinning dies 46, and a two-dimensional pick-and-place manipulator three 47 arranged in sequence. The two-dimensional pick-and-place manipulator one 41, the two-dimensional pick-and-place manipulator two 44, and the two-dimensional pick-and-place manipulator three 47 have the same structure and are all commercially available two-dimensional manipulators. As Figure 9 shown, the shaping die 43 includes an upper template 431, a lower die 436, a shaping concave die 432 connected to the upper template 431, a knockout plate 433, a guide plate 437, a wedge block 435, and a punch 434 connected to the lower template 436. The two-dimensional pick-and-place manipulator one 41 picks up the battery shell from the conveying belt 7 between the stretching and shaping processes and transfers it to the punch 434 of the shaping die 43 on the mechanical eccentric shaping press 42. The mechanical eccentric shaping press 42 starts, and the mechanical eccentric shaping press 42 presses down to perform the shaping operation on the battery shell through the shaping die 43. After shaping, the battery shell is picked up and transferred to the spinning die 46 of the mechanical eccentric trimming press 45 by the two-dimensional pick-and-place manipulator two 44. The mechanical eccentric trimming press 45 starts, and the mechanical eccentric trimming press 45 presses down to perform the trimming operation on the battery shell through the spinning die 46. After trimming, the battery shell is picked up and transferred to the conveying belt 8 between the trimming and cleaning processes by the two-dimensional pick-and-place manipulator three 47.

[0035] In this embodiment, the shell opening forming and trimming unit 4 includes two shaping and trimming stations, and after trimming, it merges with the transfer belt 8 between the trimming and cleaning processes and continues to be conveyed backward.

[0036] As Figure 6 shown, the cleaning and drying unit 5 is used for cleaning and drying the battery shell, and includes an ultrasonic cleaning and drying integrated machine 51, which specifically includes an internal planar conveyor, an ultrasonic cleaning machine mounted thereon, its corresponding cleaning tank, and a dryer. The inlet of the ultrasonic cleaning and drying integrated machine 51 corresponds to the end of the transfer belt 8 between the trimming and cleaning processes. The battery shell conveyed by the transfer belt 8 between the trimming and cleaning processes enters the ultrasonic cleaning and drying integrated machine 51 for ultrasonic cleaning and drying in sequence, and then the finished square battery shell is transferred out.

[0037] The working principle and working process of the above-mentioned automatic forming production line for square energy storage battery shells are as follows:

[0038] The raw material aluminum plate is manually fed into the vibrating grinding machine 11. Zinc stearate is put into the vibrating grinding machine 11 for polishing and saponification. After completion, the material enters the discharge belt conveyor 12 through the sieve opening at the end of the vibrating grinding machine 11. A shrinkage baffle mechanism is arranged on the belt of the discharge belt conveyor 12. The shrinkage baffle mechanism is a baffle with multiple baffle openings gradually decreasing from the conveying starting end to the conveying ending end. The two baffles near the conveying ending end are parallel to the conveying direction, and the distance between the baffles is the width of the raw material aluminum plate. The discharge belt conveyor 12 forms an orderly arrangement state of the raw material aluminum plates at the end of the discharge belt conveyor 12 through the shrinkage baffle mechanism. The drag hand support arm 234 in the three-dimensional multi-station manipulator 23 is initially in a left-right open state. The material vacuum picking mechanism 231 sucks and lifts the orderly raw material aluminum plates at the conveying ending end of the discharge belt conveyor 12 to a position where the bottom surface of the raw material aluminum plate is higher than the top surface of the flat material drag hand 232. The drag hand support arm 234 is driven by the Y-axis motor of the moving arm driving mechanism 235, and the two arms are closed inward. The forming material 90° flipping clamp 233 on both sides of the extrusion forming die 22 clamps the square shell blank formed by extruding the previous raw material aluminum plate moved to the extrusion forming die 22. The material vacuum picking mechanism 231 releases the vacuum, and the raw material aluminum plate falls onto the top surface of the flat material drag hand 232. At the same time, the Z-axis motor of the moving arm driving mechanism 235 works to separate the previously extruded square shell blank from the lower die of the extrusion forming die 22. The driving cylinder on the forming material 90° flipping clamp 233 is pushed out, and the gear meshes and rotates on the rack, driving the clamping plate to rotate, and the square shell blank completes a 90° flip; the drag hand support arm 234 is driven by the moving arm driving mechanism 235 and the moving arm follower mechanism 236 to move the next raw material aluminum plate, that is, the one that has just fallen onto the top surface of the flat material drag hand 232, to the extrusion forming die 22. At the same time, it also moves the square shell blank that has been flipped 90° and clamped by the forming material 90° flipping clamp 233 above the extrusion product conveyor 61 of the extrusion and stretching sequence intermediate conveyor belt group 6. The Z-axis motor of the moving arm driving mechanism 235 reverses to make the drag hand support arm 234 descend along the Z-axis. Then the drag hand support arm 234 becomes an open state under the reverse action of the Y-axis motor of the moving arm driving mechanism 235, and its X-axis motor reverses to make the drag hand support arm 234 return to its original position; after the toggle press 21 extrudes the raw material aluminum plate into a square shell blank, that is, the battery shell forming blank, it enters the next extrusion forming cycle.The slope conveyor 33 receives the battery case forming blanks that are judged to be good products after being detected by the extrusion profile detection CCD 62 of the extrusion product conveyor 61 of the extrusion and stretching sequence conveyor belt group 6, and transports them one by one to the receiving station of the stretching press 31. The battery cases formed by the multi-group square die orifice gradual stretching operation of the gradual stretching die 32 by the horizontal press 31 are transported to the battery case aggregate bin 352 of the 90° flipping conveyor 35 through the transverse plane conveyor 34. After the photoelectric sensor is full, the pneumatic 90° flipping mechanism 353 operates to flip the battery case aggregate bin 352 and the plane conveyor 351 by 90° so that the opening side of the battery case faces downward. The plane conveyor 351 starts, and the battery case is transported to the stretching and shaping sequence conveyor belt 7 through the plane conveyor 351, and then continues to be conveyed backward. The two-dimensional picking and placing manipulator one 41 picks up the battery case from the stretching and shaping sequence conveyor belt 7 and transfers it to the punch 434 on the shaping die 43 on the mechanical eccentric shaping press 42. The mechanical eccentric shaping press 42 starts, and the mechanical eccentric shaping press 42 presses down to realize the shaping operation of the battery case through the shaping die 43. After shaping, the battery case is picked up and transferred to the rotary cutting die 46 of the mechanical eccentric trimming press 45 by the two-dimensional picking and placing manipulator two 44. The mechanical eccentric trimming press 45 starts, and the mechanical eccentric trimming press 45 presses down to realize the trimming operation of the battery case through the rotary cutting die 46. After trimming, the battery case is picked up and transferred to the trimming and cleaning sequence conveyor belt 8 by the two-dimensional picking and placing manipulator three 47. The battery cases transported by the trimming and cleaning sequence conveyor belt 8 enter the ultrasonic cleaning and drying integrated machine 51 for ultrasonic cleaning and drying, and then the finished square battery cases are transferred out.

[0039] The transfer lines between the units of the present invention are multiple segments and multiple strips, and each unit is connected by a conveyor belt, and the process is unmanned.

Claims

1. An automatic forming production line for a square energy storage battery case, characterized in that: It includes a vibration grinding and saponification feeding unit for polishing and orderly conveying the raw material aluminum plate according to the process sequence, a vertical extrusion forming unit for extruding the polished raw material aluminum plate into a square shell blank, a gradually thinned stretching unit for gradually thinning and stretching the formed blank of the battery shell, a shell mouth forming and trimming unit for shaping and trimming the battery shell, and a cleaning and drying unit for cleaning and drying the battery shell; the vibration grinding and saponification feeding unit is arranged close to the vertical extrusion forming unit, and an extrusion and stretching inter-sequence conveyor belt group is provided between the vertical extrusion forming unit and the gradually thinned stretching unit; the extrusion and stretching inter-sequence conveyor belt group includes an extrusion product conveyor, an extrusion profile detection CCD, a defective product ejection cylinder, a defective product discharge conveyor, a controller and a control cabinet electrically connected to the controller, the extrusion profile detection CCD is electrically connected to the controller, and the defective product ejection cylinder is electrically connected to the control cabinet; the extrusion profile detection CCD and the defective product ejection cylinder are installed at the conveying end of the extrusion product conveyor, and the extrusion profile detection CCD is close to the conveying starting end; the defective product discharge conveyor is arranged on one side of the extrusion product conveyor and corresponds to the defective product ejection cylinder; a stretching and shaping inter-sequence conveyor belt is provided between the gradually thinned stretching unit and the shell mouth forming and trimming unit, and a trimming and cleaning inter-sequence conveyor belt is provided between the shell mouth forming and trimming unit and the cleaning and drying unit; The vertical extrusion forming unit includes three extrusion forming stations; The gradually thinned stretching unit includes a horizontal punching machine and corresponding gradually stretching dies, a slope conveyor, a transverse moving plane conveyor, and a 90° battery shell turning conveyor. The gradually stretching die includes a lower template, an upper template, and a die base arranged between the upper template and the lower template. A plurality of concentric square die openings with gradually decreasing sizes are provided on the die base; the conveying end of the slope conveyor corresponds to the feeding station of the gradually stretching die, the output end after stretching of the gradually stretching die is located above the transverse moving plane conveyor, and the 90° battery shell turning conveyor is located at the conveying end of the transverse moving plane conveyor; the 90° battery shell turning conveyor includes a plane conveyor, a battery shell aggregate bin, and a pneumatic 90° turning mechanism. The battery shell aggregate bin is fixed on the plane conveyor, and the plane conveyor is fixed on the turning plate of the pneumatic 90° turning mechanism; the inlet of the battery shell aggregate bin corresponds to the conveying end of the transverse moving plane conveyor, and a photoelectric sensor is arranged in the battery shell aggregate bin; the plane conveyor corresponds to the stretching and shaping inter-sequence conveyor belt.

2. The automatic forming production line of a square energy storage battery case according to claim 1, characterized in that: The vibration grinding and saponification feeding unit includes a vibration grinding machine and a discharge belt conveyor, and the sieve opening at the end of the vibration grinding machine is located at the conveying starting end of the discharge belt conveyor.

3. An automatic forming production line for a square energy storage battery case according to claim 2, characterized in that: The vibration grinding and saponification feeding unit includes three polishing and saponification feeding stations, with a total of three sets of vibration grinding machines and discharge belt conveyors.

4. The automatic forming production line of a square energy storage battery case according to claim 2, characterized in that: The vertical extrusion forming unit includes a toggle press, a corresponding extrusion forming die for extruding square shell blanks, and a three-dimensional multi-station manipulator. The three-dimensional multi-station manipulator passes through the bottom of the toggle press, and the end is corresponding to the extrusion and stretching sequence transfer belt group, and the other end is close to the discharge belt conveyor. The three-dimensional multi-station manipulator includes a material vacuum picking mechanism for picking up raw material aluminum plates, a flat material drag hand, a 90° turning clamp for formed materials, a drag hand support arm, a moving arm driving mechanism and a moving arm follow-up mechanism. The flat material drag hand is fixed on the drag hand support arm, and both ends of the drag hand support arm are respectively connected to the moving arm driving mechanism and the moving arm follow-up mechanism. The 90° turning clamp for formed materials includes a gear rack mechanism fixed on the drag hand support arm.

5. An automatic forming production line for a square energy storage battery case according to claim 1, characterized in that: The tapered stretching die includes 3-5 concentric square die openings, and the die openings are made of hard alloy steel.

6. The automatic forming production line of a square energy storage battery case according to claim 1, characterized in that: The shell mouth forming and trimming unit includes a two-dimensional pick-and-place manipulator one, a mechanical eccentric shaping press and a corresponding shaping die, a two-dimensional pick-and-place manipulator two, a mechanical eccentric trimming press and a corresponding rotary cutting die, and a two-dimensional pick-and-place manipulator three arranged in sequence. The two-dimensional pick-and-place manipulator one, the two-dimensional pick-and-place manipulator two, and the two-dimensional pick-and-place manipulator three have the same structure and are all commercially available two-dimensional manipulators. The shaping die includes an upper template, a lower template, a shaping concave die connected to the upper template, a blanking plate, a guide plate, a wedge block, and a punch connected to the lower template.

7. An automatic forming production line for a square energy storage battery case according to claim 6, characterized in that: The shell mouth forming and trimming unit includes two shaping and trimming stations.

8. An automatic forming production line for a square energy storage battery case according to claim 6, characterized in that: The cleaning and drying unit includes an ultrasonic cleaning and drying integrated machine, and the inlet of the ultrasonic cleaning and drying integrated machine corresponds to the end of the trimming and cleaning sequence transfer belt.

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