Cylindrical battery bottom cover processing equipment
By designing the preforming and forming mechanisms, the problem of poor rigidity of the cylindrical battery bottom cover eaves structure was solved, achieving stable forming of the eaves and a high yield.
Patent Information
- Application Number
- CN202423270306.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing cylindrical battery bottom cover has poor rigidity of the cover eaves structure, making it prone to deformation during production, packaging and transportation. In addition, the steel strip has limited yield strength, making it difficult to form a stable one-time molding process.
By employing a preforming mechanism and a forming mechanism, the cap is punched out and shaped through two processing steps, ensuring the stability of the product in all dimensions and a high yield rate.
This improved the rigidity of the cylindrical battery bottom cover, reduced the probability of cover deformation, ensured the stability of the product during production, packaging and transportation, and increased the yield rate.
Smart Images
Figure CN223629335U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery processing equipment, especially a cylindrical battery bottom cover processing equipment. BACKGROUND
[0002] The whole of the eave of the existing cylindrical battery bottom cover is a horizontal plate structure, and the rigidity of the eave is poor, so the eave is prone to deformation when the bottom cover is subjected to external force during production, packaging and transportation of the bottom cover. In order to overcome this defect, the applicant improves the cylindrical battery bottom cover, and designs the eave to include at least a lower inclined section of the eave extending downwardly and obliquely in a radial direction from outside to inside. Compared with the existing eave structure which is a horizontal plate structure, the new eave structure has better rigidity, and reduces the probability of deformation of the eave when the bottom cover is subjected to external force during production, packaging and transportation of the bottom cover. Due to the change of the structure of the cylindrical battery bottom cover, and the limited yield of the steel belt, it is difficult to stabilize the forming at one time, and the processing equipment also needs to be improved. SUMMARY
[0003] The utility model discloses a cylindrical battery bottom cover processing equipment.
[0004] The technical scheme for realizing the utility model is as follows: a cylindrical battery bottom cover processing equipment, which comprises, sequentially arranged in a horizontal direction, a punching mechanism for punching exhaust holes on a steel plate, a first pre-cutting mechanism for cutting a preliminary outline of a bottom cover on the steel plate, a second pre-cutting mechanism for cutting an outline of the bottom cover on the steel plate, a positive stretching mechanism for punching a reverse outline of a cap shape of the bottom cover, a reverse stretching mechanism for punching the cap shape of the bottom cover, a pre-forming mechanism for punching an eave, a forming mechanism for shaping the eave, a lettering mechanism and an edge cutting mechanism.
[0005] The preforming mechanism comprises a preforming female die, a preforming ejector pin and a preforming male die assembly. The preforming female die is arranged oppositely with the preforming male die assembly. The preforming female die has a preforming female die inner cavity. The preforming ejector pin is arranged in the preforming female die inner cavity. The lower end surface of the preforming female die is inclined from outside to inside and to one side of the upper end surface of the preforming female die. The inclination angle of the lower end surface of the preforming female die is the same as the inclination angle of the eave. The preforming male die assembly comprises a first male die, a second male die and a first die core. The second male die is concentrically and movably nested in the first male die. The inner diameter of the first male die is equal to the outer diameter of the eave. The upper end surface of the second male die is arranged oppositely and parallel to the lower end surface of the preforming female die. The first die core has a first die core shaft and a first die core base. The first die core shaft is concentrically nested in the second male die. The first die core base is located outside the bottom of the first male die and fixed with the first male die. The horizontal position of the upper end surface of the first male die is between the upper end surface of the second male die and the upper end surface of the first die core during the preforming operation. The lower end surface of the preforming female die, the lower end surface of the preforming ejector pin, the upper end surface of the second male die and the upper end surface of the first die core form a containing space of the cylindrical battery bottom cover.
[0006] The forming mechanism comprises a forming female die, a forming ejector pin and a forming male die assembly. The forming female die is arranged oppositely with the forming male die assembly. The forming female die has a forming female die inner cavity. The forming ejector pin is arranged in the forming female die inner cavity. The outer diameter of the lower end of the forming female die is greater than the outer diameter of the eave. The lower end of the forming female die extends outwardly along the axial direction of the forming female die to form a boss. The inner wall of the boss is flush with the inner wall of the forming female die. The lower end surface of the boss is inclined from outside to inside and to one side of the upper end surface of the preforming female die. The forming male die assembly comprises a third male die, a fourth male die and a second die core. The fourth male die is concentrically and movably nested in the third male die. The second die core has a second die core shaft and a second die core base. The second die core shaft is concentrically nested in the fourth male die. The second die core base is located outside the bottom of the third male die and fixed with the third male die. The inner diameter of the third male die is equal to the outer diameter of the eave. The upper end surface of the fourth male die is arranged oppositely and parallel to the lower end surface of the boss. The inclination angle of the lower end surface of the boss is the same as the inclination angle of the eave. The horizontal position of the upper end surface of the third male die is between the upper end surface of the fourth male die and the upper end surface of the second die core during the forming operation. The lower end surface of the boss, the lower end surface of the forming ejector pin, the upper end surface of the fourth male die and the upper end surface of the second die core form a containing space of the cylindrical battery bottom cover.
[0007] Since the yield strength of steel strip is limited, it is difficult to form a stable shape in one go. The cylindrical battery bottom cover processing equipment realized by this utility model adopts a pre-forming mechanism for punching out the cover and a forming mechanism for shaping the cover in the cover forming stage. Through two processing steps, it can ensure that the product is stable in all dimensions regardless of low, medium and high speed and meets the process dimensions, resulting in a high product yield. Attached Figure Description
[0008] Figure 1 This is a cross-sectional view of the cylindrical battery bottom cover according to an embodiment of the present invention;
[0009] Figure 2 A schematic diagram of the cylindrical battery bottom cover processing equipment described in this embodiment of the utility model;
[0010] Figure 3 This is a schematic diagram of the assembly structure of the preforming mechanism described in this embodiment of the present invention, excluding the first push rod mechanism;
[0011] Figure 4 for Figure 3 A magnified structural diagram of part A;
[0012] Figure 5 This is a schematic diagram of the preformed punch assembly described in an embodiment of the present invention;
[0013] Figure 6 This is a schematic diagram of the assembly structure of the forming mechanism described in this embodiment of the present invention, excluding the second push rod mechanism;
[0014] Figure 7 for Figure 6 A magnified structural diagram of part B in the middle section;
[0015] Figure 8 This is a schematic diagram of the forming mechanism described in an embodiment of the present utility model. Detailed Implementation
[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0017] like Figure 1 As shown, the cylindrical battery bottom cover 100 includes a bottom cover cap 1001, and the bottom cover cap 1001 is axially provided with a cover rim 1002. The outer edge of the cover rim 1002 extends circumferentially toward the bottom cover cap to form a rolled edge 1003. Several vent holes 1004 are spaced apart circumferentially on the side wall of the bottom cover 100.
[0018] like Figure 2As shown, a cylindrical battery bottom cover processing equipment includes a punching mechanism 10 for punching vent holes on a steel plate, a first pre-cutting mechanism 20 for cutting a preliminary outline of the bottom cover on the steel plate, a second pre-cutting mechanism 30 for cutting the outline of the bottom cover on the steel plate, a forward stretching mechanism 40 for punching a reverse outline of the bottom cover head shape, a reverse stretching mechanism 50 for punching the bottom cover head shape, a pre-forming mechanism 60 for punching the cover lip and rolled edge, a forming mechanism 70 for shaping the cover lip and rolled edge, a printing mechanism 80, and an edge trimming mechanism 90, arranged sequentially in the horizontal direction.
[0019] like Figures 3 to 5 As shown, the preforming mechanism 60 includes a preforming die 1, a preforming ejector pin 2, and a preforming punch assembly 3. The preforming die 1 and the preforming punch assembly 3 are arranged vertically opposite each other. The preforming die 1 has a preforming die cavity 11. The preforming ejector pin 2 is vertically and vertically inserted into the preforming die cavity 11. The lower end face 12 of the preforming die 1 is an inclined surface that slopes from the outside inward and towards the upper end face 13 of the preforming die 1. The inclination angle of the lower end face 12 of the preforming die 1 is the same as the inclination angle of the cap 1002. The preforming punch assembly 3 includes a first punch 31, a second punch 32, and a first mold core 33. The second punch 32 is concentrically and movably nested within the first punch 31. The inner diameter C of the first punch 31 is equal to the outer diameter D of the cover. The upper end face 321 of the second punch 32 is opposite to and parallel to the lower end face 12 of the preformed die 1. The first mold core 33 has a first mold core spindle 331 and a first mold core base 332. The first mold core spindle 331 is concentrically nested within the second punch 32. The first mold core base 332 is located on one side of the bottom of the first punch 31 and is fixed to the bottom of the first punch 31. A first push rod mechanism 34 for driving the second punch 32 to rise and fall is installed below the first mold core 33.
[0020] When the pre-forming ejector pin 2 descends, the horizontal position of the upper end face 311 of the first punch 31 is between the upper end face 321 of the second punch 32 and the upper end face 333 of the first mold core 33. The lower end face 12 of the pre-forming die 1, the lower end face of the pre-forming ejector pin 2, the upper end face 321 of the second punch 32 and the upper end face 331 of the first mold core 33 form a receiving space for the bottom cap head 1001. The pre-forming mechanism 60 punches out the shape of the cap 1002. When the pre-forming ejector pin 4 rises, the first ejector rod mechanism 34 rises and drives the second punch 32 to rise, realizing rapid demolding and feeding.
[0021] like Figures 6 to 8As shown, the forming mechanism 70 comprises a forming concave die 4, a forming ejector pin 5 and a forming punch assembly 6, the forming concave die 4 is arranged oppositely with the forming punch assembly 6, the forming concave die 4 has a forming concave die inner cavity 41, the forming ejector pin 5 is arranged in the forming concave die inner cavity 41 in a lifting mode, the outer diameter E of the lower end 42 of the forming concave die 4 is greater than the outer diameter D of the cover eave 1002, the lower end 42 of the forming concave die 4 extends outwardly along the axial direction of the forming concave die 4 and forms a boss 43, the inner wall of the boss 43 is flush with the inner wall 411 of the forming concave die 4, the lower end surface 431 of the boss 43 is a bevel surface which is inclined from outside to inside and to the upper end surface 44 of the forming concave die 4, the inclination angle of the lower end surface 431 of the boss 43 is the same as that of the cover eave 1002; the forming punch assembly 6 comprises a third punch 61, a fourth punch 62 and a second mold core 63, the fourth punch 62 is concentrically nested in the third punch 61, the inner diameter F of the third punch 61 is equal to the outer diameter D of the cover eave, the upper end surface 621 of the fourth punch 62 is arranged oppositely and parallelly with the lower end surface 431 of the boss 43; the second mold core 63 has a second mold core shaft 631 and a second mold core base 632, the second mold core shaft 631 is concentrically nested in the fourth punch 62, the second mold core base 632 is located outside the bottom of the third punch 61 and is fixed with the bottom of the third punch 61, the second mold core 63 is provided with a second ejector rod mechanism 64 for driving the fourth punch 62 to lift.
[0022] When the forming ejector pin is lowered to perform the stamping work, the fourth punch 62 is lowered, the horizontal position of the upper end surface 611 of the third punch 61 is between the upper end surface 621 of the fourth punch 62 and the upper end surface 631 of the second mold core 63, the lower end surface 431 of the boss 43, the lower end surface of the forming ejector pin 5, the upper end surface 621 of the fourth punch 62 and the upper end surface 631 of the second mold core 63 form a containing space of the cylindrical battery bottom cover, and the forming mechanism 70 shapes the cover eave 1002 for the second time.
[0023] The first ejector rod mechanism and the second ejector rod mechanism are the conventional demolding structures which are reset by compression springs on the ejector rods, the punching mechanism, the first pre-cutting mechanism, the second pre-cutting mechanism, the positive stretching mechanism, the reverse stretching mechanism, the lettering mechanism and the edge cutting mechanism are all the same as the original corresponding devices on the production line, the structures of which are the prior art and are not the invention points of the utility model, and will not be repeated here.
[0024] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent process transformation or direct or indirect application in other related technical fields based on the content of the present application is also included in the patent protection scope of the present application.
Claims
1. A processing equipment for cylindrical battery bottom covers, characterized in that: It comprises punching mechanism for punching exhaust hole on steel plate, first pre-cutting mechanism for cutting preliminary profile of bottom cover on the steel plate, second pre-cutting mechanism for cutting profile of bottom cover on the steel plate, positive drawing mechanism for punching reverse profile of bottom cover cap shape, reverse drawing mechanism for punching the bottom cover cap shape, pre-forming mechanism for punching eaves, forming mechanism for eaves shaping, lettering mechanism and edge cutting mechanism arranged in sequence in horizontal direction; The pre-forming mechanism comprises a pre-forming concave die, a pre-forming top pin and a pre-forming convex die assembly, the pre-forming concave die is arranged opposite to the pre-forming convex die assembly, the pre-forming concave die has a pre-forming concave die inner cavity, the pre-forming top pin is arranged in the pre-forming concave die inner cavity in a lifting manner, the lower end surface of the pre-forming concave die is a bevel surface inclined from outside to inside and to one side of the upper end surface of the pre-forming concave die, the inclination angle of the lower end surface of the pre-forming concave die is the same as the inclination angle of the eaves, the pre-forming convex die assembly comprises a first convex die, a second convex die and a first die core, the second convex die is concentrically and movably nested in the first convex die, the inner diameter of the first convex die is equal to the outer diameter of the eaves, the upper end surface of the second convex die is arranged opposite and parallel to the lower end surface of the pre-forming concave die, the first die core has a first die core shaft and a first die core base, the first die core shaft is concentrically nested in the second convex die, the first die core base is located outside the bottom of the first convex die and fixed with the first convex die, the horizontal position of the upper end surface of the first convex die is between the upper end surface of the second convex die and the upper end surface of the first die core during pre-forming operation, the lower end surface of the pre-forming concave die, the lower end surface of the pre-forming top pin, the upper end surface of the second convex die and the upper end surface of the first die core form a containing space of the cylindrical battery bottom cover. The forming mechanism comprises a forming concave die, a forming ejector pin and a forming convex die assembly, the forming concave die and the forming convex die assembly are arranged oppositely, the forming concave die has a forming concave die inner cavity, the forming ejector pin is arranged in the forming concave die inner cavity in a lifting manner, the outer diameter of the lower end of the forming concave die is larger than the outer diameter of the cover eave, the lower end of the forming concave die extends outward along the axial direction of the forming concave die and forms a boss, the inner wall of the boss is flush with the inner wall of the forming concave die, the lower end surface of the boss is a bevel surface which is inclined from outside to inside and to one side of the upper end surface of the pre-forming concave die, the inclination angle of the lower end surface of the boss is the same as the inclination angle of the cover eave; the forming convex die assembly comprises a third convex die, a fourth convex die and a second die core, the fourth convex die is concentrically and movably nested in the third convex die, the second die core has a second die core shaft and a second die core base, the second die core shaft is concentrically nested in the fourth convex die, the second die core base is located outside the bottom of the third convex die and is fixed with the third convex die, the inner diameter of the third convex die is equal to the outer diameter of the cover eave, the upper end surface of the fourth convex die is arranged oppositely and parallel to the lower end surface of the boss; during the forming operation, the horizontal position of the upper end surface of the third convex die is between the upper end surface of the fourth convex die and the upper end surface of the second die core, the lower end surface of the boss, the lower end surface of the forming ejector pin, the upper end surface of the fourth convex die and the upper end surface of the second die core form a containing space of the cylindrical battery bottom cover.