Production process for counter bore of aluminum bar of battery positive and negative electrode connecting sheet

Abstract

The invention relates to the technical field of aluminum bar processing, in particular to a battery positive and negative electrode connecting piece aluminum bar counter bore production process which comprises a bottom plate and further comprises a controller, a punching mechanism and an automatic demolding mechanism, and the punching mechanism comprises a punching lower die, a punching upper die, a top plate and a driving assembly; the automatic demolding mechanism comprises a lifting frame, a rotating assembly, two pushing assemblies and a plurality of ejector rods, the ejector rods are arranged at the top of the lifting frame at equal intervals, the top ends of the ejector rods are flush with the bottoms of the inner sides of cavities in the tops of the punching lower molds, and the driving assembly and the rotating assembly are electrically connected with the controller. According to the battery positive and negative electrode connecting piece aluminum bar counter bore production process, the aluminum bar can be formed on the outer wall of the material belt in a stamping mode, meanwhile, counter bore, bending, chamfering and shaping on the surface of the aluminum bar are completed at a time, the next process is not needed, the intermediate turnover process and time are reduced, the one-stop machining effect of a mold is achieved, and the production efficiency is improved. And the production quality of the aluminum bar is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum bar processing, and in particular to a production process for aluminum bar countersunk holes for positive and negative electrode connecting pieces of batteries. Background Art

[0002] The main functions of the battery positive and negative electrode connecting aluminum bar include connection, support and heat dissipation. The aluminum bar is an aluminum bracket that connects two battery cells in the battery pack, usually made of high-strength, high-corrosion-resistant aluminum alloy.

[0003] The structures of the above two inventions have the following shortcomings: 1. The existing mold process cannot complete the countersinking on the product and needs to be transferred to the next process. After the mold stamping is completed, CNC is required to process the countersinking, which adds an additional production process, increases the intermediate turnover process and time, and reduces the quality of aluminum bar production.

[0004] 2. It is impossible to process multiple aluminum bars at one time, that is, it is impossible to achieve mass production of aluminum bars, which reduces production efficiency and is not conducive to expanding production. Summary of the invention

[0005] The purpose of the present invention is to provide a production process for aluminum bar countersunk holes of positive and negative electrode connecting pieces of batteries.

[0006] To achieve this object, the present invention adopts the following technical solutions: Provide the production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries, including the bottom plate; It also includes a controller, a stamping mechanism and an automatic demoulding mechanism; The punching mechanism is arranged on the top of the bottom plate, and the punching mechanism includes a punching lower die, a punching upper die, a top plate and a driving assembly. A fixed plate is vertically arranged on the top of the bottom plate, and the driving assembly is arranged on the outer wall of one end of the fixed plate. Two guide rails are fixedly arranged on the outer wall of the other end of the fixed plate, and a slider is slidably arranged on the outer wall of each guide rail. The top plate is fixedly arranged between the two sliders, and the punching upper die is fixedly arranged at the bottom of the top plate. The outer walls of the punching lower die and the punching upper die are provided with a plurality of cavities for stamping and forming aluminum bars; The automatic demoulding mechanism is arranged on the top of the base plate, and the automatic demoulding mechanism includes a lifting frame, a rotating assembly, two pushing assemblies and a plurality of ejector rods. Two guide rods are fixedly arranged on the top of the base plate, and the lifting frame is slidably arranged on the outer walls of the two guide rods through two sliding bearings. The rotating assembly is arranged on the top of the base plate, and the two pushing assemblies are symmetrically arranged on the top of the base plate. A plurality of ejector rods are arranged at equal intervals on the top of the lifting frame, and each ejector rod is fixedly connected to the lifting frame. The top ends of the plurality of ejector rods are flush with the inner bottom ends of the cavities at the top ends of the plurality of punching lower dies, and the driving assembly and the rotating assembly are electrically connected to the controller.

[0007] Furthermore, the driving assembly includes a cylinder and a push plate. The cylinder is fixed on the outer wall of the fixed plate, the push plate is fixed between its output end and the top plate, and an avoidance groove for vertical sliding of the push plate is provided on the outer wall of the fixed plate. The cylinder is electrically connected to the controller.

[0008] Furthermore, a plurality of punches are fixedly provided inside each cavity of the punching upper die, a plurality of avoidance holes are opened at the top of each cavity of the punching lower die, and the axial direction of each punch is consistent with that of an avoidance hole.

[0009] Furthermore, the rotating assembly includes a rotating shaft, a micro motor, a driving wheel, a driven wheel and a belt. The rotating shaft is rotatably arranged on the top of the base plate through a support plate, the driven wheel is fixed on the rotating shaft, the micro motor is fixed on the top of the base plate, the driving wheel is fixed on its output end, the belt sleeve is arranged between the driving wheel and the driven wheel, and the driving wheel is smaller than the driven wheel, and the micro motor is electrically connected to the controller.

[0010] Furthermore, each pushing assembly includes a turntable, a connecting rod and a push block. The push block is fixed on the outer wall of one end of the lifting frame. The turntable is fixed on the rotating shaft. The connecting rod is hinged between the turntable and the push block. Four sliding grooves are symmetrically arranged at both ends of the punching lower die, and the lifting frame is slidably connected to the four sliding grooves.

[0011] Furthermore, an anti-dropping block is fixedly provided on the top of each guide rod, a buffer spring is sleeved on the outer wall of each guide rod, and each anti-dropping block and each sliding bearing respectively abut against two ends of a buffer spring.

[0012] Furthermore, a plurality of lead-out grooves are arranged at equal intervals on the inner wall of the punching lower die, and a plurality of avoidance holes are connected with the plurality of lead-out grooves.

[0013] Furthermore, a collection box is provided at one end of the top of the bottom plate close to the outlet slot.

[0014] Furthermore, a plurality of inserting rods are fixedly provided at the bottom of the top plate, and a plurality of sleeve rods are fixedly provided at the top of the bottom plate, and each inserting rod is plug-fitted with a sleeve rod.

[0015] Furthermore, guide rollers are rotatably provided at both ends of the top of the bottom plate.

[0016] Beneficial effects of the present invention: 1. The present invention designs a controller, a stamping mechanism and an automatic demoulding mechanism, and through the cooperation of the three, it is possible to stamp out aluminum bars on the outer wall of the material strip, and simultaneously complete the countersinking, bending, chamfering and shaping of the surface of the aluminum bars at one time without switching to the next process, thereby reducing the intermediate turnover process and time, achieving a one-stop processing effect of the mold, and further facilitating the improvement of the quality of aluminum bar production.

[0017] 2. The present invention designs a plurality of cavities on the outer walls of the punching upper die and the punching lower die, so that a plurality of aluminum bars can be punched at one time and the countersinking operation on the outer wall can be completed, thereby achieving the effect of batch processing of aluminum bars, which is beneficial to expanding production and increasing corporate profits.

[0018] 3. The present invention uses an automatic demoulding mechanism, namely a lifting frame, a rotating component, two pushing components and a plurality of ejector rods, which can open the punching upper die after punching a portion of the outer wall of the material strip. A plurality of aluminum bars formed by punching countersunk holes are first ejected from the cavity of the punching lower die by a plurality of ejector rods, and then the remaining material strip is transported to the area between the punching upper die and the punching lower die by the unwinding device and the guide roller, so as to realize the continuous stamping of the aluminum bars, thereby improving the efficiency of punching countersunk holes.

[0019] 4. The present invention designs a plurality of lead-out grooves consistent with the cavity on the inner wall of the punching lower die, and the avoidance groove is connected with the lead-out groove. When the scraps slide from the lead-out groove to the inside of the collection box, they are collected. When the collection box is full, it is emptied. The collected scraps can be processed again after melting, which is beneficial to reducing the production cost of aluminum bars.

[0020] 5. The present invention designs a buffer spring. When the lifting frame rises vertically, the buffer spring changes from an initial state to a taut state. Since each anti-drop block and each sliding bearing respectively contact the two ends of a buffer spring, the contraction of the buffer spring exerts a certain resistance on the rise of the lifting frame, thereby achieving a buffer effect, ensuring that the stamped aluminum bar part on the material strip is ejected slowly, preventing the aluminum bar with a good countersunk hole from being damaged due to excessive ejection speed or force, thereby protecting the product and further facilitating the improvement of the countersunk hole quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 for Figure 1 A in the enlarged view; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention without one of the guide rollers; Figure 4 for Figure 3 The enlarged view of point B in the figure; Figure 5 is a side view of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the punching lower die of the present invention; Figure 7 for Figure 6 The enlarged view of point C in the figure; Figure 8 Schematic diagram of the three-dimensional structure of the aluminum bar of the present invention; In the figure: bottom plate 11, punching lower die 12, punching upper die 13, top plate 14, fixed plate 15, guide rail 16, slider 17, cavity 18, lifting frame 19, ejector rod 20, guide rod 21, cylinder 22, push plate 23, punch 24, avoidance hole 25, rotating shaft 26, micro motor 27, driving wheel 28, driven wheel 29, belt 30, turntable 31, connecting rod 32, push block 33, slide groove 34, buffer spring 35, lead-out groove 36, collection box 37, insertion rod 38, sleeve rod 39, guide roller 40, aluminum bar 41. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and they should not be understood as limitations of the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0025] Reference Figures 1 to 8 As shown, the production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries includes a bottom plate 11; It also includes a controller, a stamping mechanism and an automatic demoulding mechanism; The punching mechanism is arranged on the top of the bottom plate 11, and the punching mechanism includes a punching lower die 12, a punching upper die 13, a top plate 14 and a driving assembly. A fixed plate 15 is vertically arranged on the top of the bottom plate 11, and the driving assembly is arranged on the outer wall of one end of the fixed plate 15. Two guide rails 16 are fixedly arranged on the outer wall of the other end of the fixed plate 15, and a slider 17 is slidably arranged on the outer wall of each guide rail 16. The top plate 14 is fixedly arranged between the two sliders 17, and the punching upper die 13 is fixedly arranged at the bottom of the top plate 14. The outer walls of the punching lower die 12 and the punching upper die 13 are provided with a plurality of cavities 18 for stamping and forming the aluminum bar 41; The automatic demoulding mechanism is arranged at the top of the base plate 11, and the automatic demoulding mechanism includes a lifting frame 19, a rotating assembly, two pushing assemblies and a plurality of ejector rods 20. Two guide rods 21 are fixedly arranged on the top of the base plate 11. The lifting frame 19 is slidably arranged on the outer walls of the two guide rods 21 through two sliding bearings. The rotating assembly is arranged at the top of the base plate 11, and the two pushing assemblies are symmetrically arranged on the top of the base plate 11. A plurality of ejector rods 20 are arranged at equal intervals on the top of the lifting frame 19, and each ejector rod 20 is fixedly connected to the lifting frame 19. The top ends of the plurality of ejector rods 20 are flush with the inner bottom of the cavity 18 at the top of the plurality of punching lower dies 12, and the driving assembly and the rotating assembly are electrically connected to the controller.

[0026] Reference Figures 1 to 8As shown, the driving assembly includes a cylinder 22 and a push plate 23. The cylinder 22 is fixed on the outer wall of the fixed plate 15, and the push plate 23 is fixed between its output end and the top plate 14. The outer wall of the fixed plate 15 is provided with an avoidance groove for the push plate 23 to slide vertically. The cylinder 22 is electrically connected to the controller. When the material strip is conveyed between the punching upper die 13 and the punching lower die 12, the cylinder 22 is started by the controller, so that its output end is vertically lowered. Since its output end is fixedly connected to the push plate 23, the push plate 23 is fixedly connected to the top plate 14. The top plate 14 is slidably connected to the two guide rails 16 on the outer wall of the fixed plate 15 through two sliders 17, so that the top drives the punching upper die 13 to descend vertically, so that the punching upper die 13 approaches the punching lower die 12.

[0027] Reference Figures 1 to 8 As shown, a plurality of punches 24 are fixedly provided inside each cavity 18 located in the punching upper die 13, a plurality of avoidance holes 25 are opened on the top of each cavity 18 located in the punching lower die 12, and the axial direction of each punch 24 is consistent with that of an avoidance hole 25. When the punching upper die 13 approaches the punching lower die 12 until the two are tightly closed, since the interior of each cavity 18 located in the punching upper die 13 is fixedly connected with a plurality of punches 24, a plurality of avoidance holes 25 are designed on the top of each cavity 18 located in the punching lower die 12, and the axial direction of each punch 24 is consistent with that of an avoidance hole 25, the portion of the material strip located in the cavity 18 is punched to complete the countersinking operation, and the bending, shaping and chamfering of the aluminum bar 41 are completed at the same time. The countersinking is mainly convenient for welding the aluminum bar 41 with other components to improve the use efficiency.

[0028] Reference Figures 1 to 8 As shown, the rotating assembly includes a rotating shaft 26, a micro motor 27, a driving wheel 28, a driven wheel 29 and a belt 30. The rotating shaft 26 is rotatably arranged on the top of the base plate 11 through a support plate, the driven wheel 29 is fixedly arranged on the rotating shaft 26, the micro motor 27 is fixedly arranged on the top of the base plate 11, the driving wheel 28 is fixedly arranged on its output end, the belt 30 is sleeved between the driving wheel 28 and the driven wheel 29, and the driving wheel 28 is smaller than the driven wheel 29, the micro motor 27 is electrically connected to the controller, and when a number of aluminum bars 41 are punched out of the material belt, the micro motor 27 is started by the controller, so that its output end drives the driving wheel 28 to rotate, and since the driven wheel 29 is fixedly connected to the rotating shaft 26, the driving wheel 28 and the driven wheel 29 are sleeved by the belt 30, and the driving wheel 28 is smaller than the driven wheel 29, thereby driving the rotating shaft 26 to rotate.

[0029] Reference Figures 1 to 8As shown, each pushing assembly includes a turntable 31, a connecting rod 32 and a pushing block 33. The pushing block 33 is fixedly arranged on the outer wall of one end of the lifting frame 19. The turntable 31 is fixedly arranged on the rotating shaft 26. The connecting rod 32 is hingedly arranged between the turntable 31 and the pushing block 33. Four slide grooves 34 are symmetrically arranged at both ends of the punching lower die 12. The lifting frame 19 is slidably connected to the four slide grooves 34. When the rotating shaft 26 rotates, since the turntable 31 is fixedly connected to the rotating shaft 26, the pushing block 33 is fixedly connected to one end of the lifting frame 19, and the lifting frame 19 is connected to the punching lower die 12 is slidably connected, the turntable 31 and the push block 33 are respectively hinged with the two ends of the connecting rod 32, the lifting frame 19 is slidably connected with the two sliding rods, and a plurality of ejector rods 20 are designed at equal intervals on the top of the lifting frame 19, and each ejector rod 20 is fixedly connected to the lifting frame 19, so that the lifting frame 19 drives a plurality of ejector rods 20 to vertically rise in the cavity 18 at the top of a plurality of punching lower dies 12, and the aluminum bar 41 part stamped and formed on the material strip is ejected upward, so that the unwinding equipment continues to unwind the material strip, and then the aluminum bar 41 countersunk holes are performed on the remaining part of the material strip.

[0030] Reference Figures 1 to 8 As shown, an anti-slip block is fixedly provided on the top of each guide rod 21, and a buffer spring 35 is sleeved on the outer wall of each guide rod 21. Each anti-slip block and each sliding bearing respectively abut against two ends of a buffer spring 35. When the lifting frame 19 rises vertically, the buffer spring 35 changes from an initial state to a taut state. Since each anti-slip block and each sliding bearing respectively abut against two ends of a buffer spring 35, a certain resistance is applied to the rising of the lifting frame 19 through the contraction of the buffer spring 35, thereby achieving a buffering effect, ensuring that the stamped aluminum bar 41 on the material strip is partially ejected slowly to prevent the aluminum bar 41 with a good countersink from being damaged due to excessive ejection speed or force, thereby protecting the product and thus helping to improve the quality of the countersink.

[0031] Reference Figures 1 to 8 As shown, a plurality of guide grooves 36 are arranged at equal intervals on the inner wall of the punching lower die 12, and a plurality of avoidance holes 25 are connected with the plurality of guide grooves 36. The scraps punched out by the plurality of punches 24 automatically fall into the interior of the guide grooves 36 through the plurality of avoidance holes 25. Since the guide grooves 36 are designed to be inclined, the scraps slide from the guide grooves 36 to the collection box 37.

[0032] Reference Figures 1 to 8 As shown, a collecting box 37 is provided at one end of the top of the bottom plate 11 near the outlet groove 36. When the scraps slide from the outlet groove 36 to the inside of the collecting box 37, they are collected. When the collecting box 37 is full, it is emptied. The collected scraps can be processed again after melting, which is beneficial to reducing the production cost of the aluminum bar 41.

[0033] Reference Figures 1 to 8As shown, a plurality of insert rods 38 are fixedly provided at the bottom of the top plate 14, and a plurality of sleeve rods 39 are fixedly provided at the top of the bottom plate 11. Each insert rod 38 is plugged into and matched with a sleeve rod 39. When the punching upper die 13 descends to fit with the punching lower die 12, a plurality of insert rods 38 are inserted into a plurality of sleeve rods 39, so that the punching lower die 12 can limit the punching upper die 13, which is beneficial to improve the tightness of the mold closing, thereby improving the forming effect of the aluminum bar 41.

[0034] Reference Figures 1 to 8 As shown, guide rollers 40 are rotatably provided at both ends of the top of the bottom plate 11. When the aluminum bar 41 is countersunk, the material strip is first passed through the punching upper die 13 and the punching lower die 12 by the unwinding equipment. The guide rollers 40 play the role of supporting and guiding the material strip, so that the entire material strip can be stamped during the conveying process, which is beneficial to improving the efficiency of the aluminum bar 41 countersunk.

[0035] The working principle of the present invention is as follows: when the aluminum bar 41 countersinking work is being carried out, the material strip is first passed through the punching upper die 13 and the punching lower die 12 through the unwinding equipment, and the guide roller 40 plays the role of supporting and guiding the material strip, so that the entire material strip can be stamped during the conveying process, which is beneficial to improving the efficiency of the aluminum bar 41 countersinking.

[0036] When the material strip is conveyed between the punching upper die 13 and the punching lower die 12, the cylinder 22 is started by the controller, so that its output end drops vertically. Since its output end is fixedly connected to the push plate 23, the push plate 23 is fixedly connected to the top plate 14, and the top plate 14 is slidably connected to the two guide rails 16 on the outer wall of the fixed plate 15 through two sliders 17, the top drives the punching upper die 13 to drop vertically, so that the punching upper die 13 approaches the punching lower die 12.

[0037] When the punching upper die 13 approaches the punching lower die 12 until the two are tightly closed, since the interior of each cavity 18 located in the punching upper die 13 is fixedly connected to a plurality of punches 24, a plurality of avoidance holes 25 are designed on the top of each cavity 18 located in the punching lower die 12, and each punch 24 is consistent with the axial direction of an avoidance hole 25, and then the portion of the material strip located in the cavity 18 is punched to complete the countersinking operation, and at the same time, the aluminum bar 41 is bent, shaped and chamfered. The countersinking mainly facilitates the welding of the aluminum bar 41 with other components to improve the use efficiency.

[0038] After a number of aluminum bars 41 are punched out of the material belt, the micro motor 27 is started by the controller, so that its output end drives the driving wheel 28 to rotate. Since the driven wheel 29 is fixedly connected to the rotating shaft 26, the driving wheel 28 and the driven wheel 29 are connected by the belt 30, and the driving wheel 28 is smaller than the driven wheel 29, thereby driving the rotating shaft 26 to rotate.

[0039] When the rotating shaft 26 rotates, since the turntable 31 is fixedly connected to the rotating shaft 26, the push block 33 is fixedly connected to one end of the lifting frame 19, the lifting frame 19 is slidably connected to the punching lower die 12, the turntable 31 and the push block 33 are respectively hinged to the two ends of the connecting rod 32, the lifting frame 19 is slidably connected to the two sliding rods, and a number of push rods 20 are designed at equal intervals on the top of the lifting frame 19, and each push rod 20 is fixedly connected to the lifting frame 19, so that the lifting frame 19 drives a number of push rods 20 to rise vertically in the cavity 18 at the top of a number of punching lower dies 12, and pushes the aluminum bar 41 stamped on the material strip upward, so that the unwinding equipment continues to unwind the material strip, and then the aluminum bar 41 countersunk holes are performed on the remaining part of the material strip.

[0040] When the lifting frame 19 rises vertically, the buffer spring 35 changes from an initial state to a taut state. Since each anti-slip block and each sliding bearing respectively contact the two ends of a buffer spring 35, the contraction of the buffer spring 35 exerts a certain resistance on the rise of the lifting frame 19, thereby achieving a buffering effect, ensuring that the stamped aluminum bar 41 on the material strip is ejected slowly, preventing the aluminum bar 41 with a good countersunk hole from being damaged due to excessive ejection speed or force, thereby protecting the product and thus helping to improve the countersunk hole quality.

[0041] When the punching upper die 13 descends to fit with the punching lower die 12, a plurality of insert rods 38 are inserted into a plurality of sleeve rods 39, so that the punching lower die 12 can limit the punching upper die 13, which is beneficial to improve the tightness of the mold and further improve the forming effect of the aluminum bar 41.

[0042] The scraps punched out by the punches 24 automatically fall into the inside of the outlet groove 36 through the avoidance holes 25 . Since the outlet groove 36 is designed to be inclined, the scraps slide from the outlet groove 36 to the collection box 37 .

[0043] When the scraps slide from the outlet groove 36 to the inside of the collecting box 37, they are collected. When the collecting box 37 is full, it is emptied. The collected scraps can be processed again after melting, which is beneficial to reducing the production cost of the aluminum bar 41.

Claims

1. A production process for aluminum countersunk holes of positive and negative electrode connecting pieces of batteries, comprising a bottom plate (11), characterized in that: It also includes a controller, a stamping mechanism and an automatic demoulding mechanism; The punching mechanism is arranged on the top of the bottom plate (11), and the punching mechanism comprises a punching lower die (12), a punching upper die (13), a top plate (14) and a driving assembly. A fixed plate (15) is vertically arranged on the top of the bottom plate (11), and the driving assembly is arranged on the outer wall of one end of the fixed plate (15). Two guide rails (16) are fixedly arranged on the outer wall of the other end of the fixed plate (15). A slider (17) is slidably arranged on the outer wall of each guide rail (16). The top plate (14) is fixedly arranged between the two sliders (17). The punching upper die (13) is fixedly arranged on the bottom of the top plate (14). The outer walls of the punching lower die (12) and the punching upper die (13) are each provided with a plurality of cavities (18) for punching and forming the aluminum bar (41). The automatic demoulding mechanism is arranged on the top of the bottom plate (11), and comprises a lifting frame (19), a rotating assembly, two pushing assemblies and a plurality of ejector rods (20). Two guide rods (21) are fixedly arranged on the top of the bottom plate (11). The lifting frame (19) is slidably arranged on the outer walls of the two guide rods (21) through two sliding bearings. The rotating assembly is arranged on the top of the bottom plate (11). The two pushing assemblies are symmetrically arranged on the top of the bottom plate (11). A plurality of ejector rods (20) are arranged at equal intervals on the top of the lifting frame (19), and each ejector rod (20) is fixedly connected to the lifting frame (19). The top ends of the plurality of ejector rods (20) are flush with the inner bottom of the cavity (18) at the top of the plurality of punching lower dies (12). The driving assembly and the rotating assembly are electrically connected to the controller.

2. The production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 1, characterized in that: The driving assembly comprises a cylinder (22) and a push plate (23), wherein the cylinder (22) is fixedly arranged on the outer wall of the fixed plate (15), the push plate (23) is fixedly arranged between the output end thereof and the top plate (14), an avoidance groove for vertical sliding of the push plate (23) is provided on the outer wall of the fixed plate (15), and the cylinder (22) is electrically connected to a controller.

3. The production process of aluminum bar countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 2, characterized in that: A plurality of punches (24) are fixedly disposed inside each cavity (18) of the punching upper die (13), a plurality of avoidance holes (25) are opened at the top of each cavity (18) of the punching lower die (12), and the axial direction of each punch (24) is consistent with that of an avoidance hole (25).

4. The production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 3 is characterized by: The rotating assembly comprises a rotating shaft (26), a micro motor (27), a driving wheel (28), a driven wheel (29) and a belt (30); the rotating shaft (26) is rotatably arranged on the top of the bottom plate (11) via a support plate; the driven wheel (29) is fixedly arranged on the rotating shaft (26); the micro motor (27) is fixedly arranged on the top of the bottom plate (11); the driving wheel (28) is fixedly arranged on the output end thereof; the belt (30) is sleeved between the driving wheel (28) and the driven wheel (29); the driving wheel (28) is smaller than the driven wheel (29); and the micro motor (27) is electrically connected to a controller.

5. The production process of aluminum bar countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 4, characterized in that: Each pushing assembly comprises a rotating disk (31), a connecting rod (32) and a pushing block (33); the pushing block (33) is fixedly arranged on an outer wall of one end of the lifting frame (19); the rotating disk (31) is fixedly arranged on a rotating shaft (26); the connecting rod (32) is hingedly arranged between the rotating disk (31) and the pushing block (33); four sliding grooves (34) are symmetrically arranged at both ends of the punching lower die (12); and the lifting frame (19) is slidably connected to the four sliding grooves (34).

6. The production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 5, characterized in that: An anti-dropping block is fixedly provided on the top of each guide rod (21), a buffer spring (35) is sleeved on the outer wall of each guide rod (21), and each anti-dropping block and each sliding bearing respectively abut against two ends of a buffer spring (35).

7. The production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 6, characterized in that: A plurality of lead-out grooves (36) are arranged at equal intervals on the inner wall of the punching lower die (12), and the plurality of avoidance holes (25) are connected to the plurality of lead-out grooves (36).

8. The production process of aluminum bar countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 7, characterized in that: A collection box (37) is provided at one end of the top of the bottom plate (11) close to the outlet groove (36).

9. The production process of aluminum bar countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 8, characterized in that: A plurality of insertion rods (38) are fixedly provided at the bottom of the top plate (14), and a plurality of sleeve rods (39) are fixedly provided at the top of the bottom plate (11), and each insertion rod (38) is plugged into and matched with a sleeve rod (39).

10. The production process of aluminum countersunk holes for positive and negative electrode connecting pieces of batteries according to claim 9, characterized in that: Guide rollers (40) are rotatably provided at both ends of the top of the bottom plate (11).

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