A forming device for a large taper liquid injection hole top cover

Abstract

The utility model provides a kind of forming device of large taper liquid injection hole top cover, including finish upper die, finish lower die and material belt, finish upper die includes upper die holder, upper die plate, stripper plate, preforming punch and forming punch, finish lower die includes lower die holder, lower die plate and lower backing plate, preforming female die plate and forming female die are arranged in lower die plate, material belt is installed on lower die plate, upper die plate is downward to lower die plate direction, preforming punch is driven to material belt stamping, forms convex and pressure groove on material belt;Forming punch is stamped to pressure groove material belt, and liquid injection hole with taper surface is punched out on material belt;The utility model realizes once stamping convex, pressure groove and liquid injection hole with taper surface on material belt by the synergies of finish upper die and lower die.The structure simplifies production process, reduces the number of mould and process conversion time, significantly improves production efficiency and product consistency, effectively avoids material stress concentration, reduces workpiece deformation and cracking risk.

Description

Technical Field

[0001] This utility model relates to the technical field of injection hole top cover forming, and in particular to a forming device for a large taper injection hole top cover. Background Technology

[0002] In battery manufacturing, the injection port of the top cover typically requires a large taper structure to meet the requirements of sealing performance and injection efficiency. Existing injection port forming devices often employ multiple processes to separately form the bulge, groove, and injection port, resulting in complex equipment structures, low production efficiency, and difficulty in guaranteeing forming accuracy. For example, traditional devices are prone to material deformation or breakage during the stamping process, affecting product consistency and reliability. Furthermore, insufficient control over the forming of the tapered groove makes it difficult to achieve precise forming of the large taper structure, often requiring subsequent processing, increasing production costs and time. Therefore, there is an urgent need in this field for an integrated, high-precision forming device capable of forming the large taper injection port top cover in one step, improving production efficiency and product quality. Utility Model Content

[0003] To address the shortcomings and defects of existing technologies, this invention provides a molding device for a top cover of a large-tapered injection hole. To achieve the purpose of molding a top cover sheet for a large-tapered injection hole, this invention provides the following technical solution.

[0004] A forming device for a large-tapered injection hole cap includes a finishing upper mold, a finishing lower mold, and a strip. The finishing upper mold includes an upper mold base, an upper template, a stripper plate, a pre-forming punch, and a forming punch. The finishing lower mold includes a lower mold base, a lower template, and a lower pad. A pre-forming concave template and a forming concave template are provided inside the lower template. The strip is mounted on the lower template. The upper template moves downward toward the lower template, driving the pre-forming punch to press the strip, forming a protrusion and a groove on the strip. The forming punch presses the grooved strip, punching an injection hole with a tapered surface on the strip.

[0005] Compared with existing technologies, this invention achieves one-time stamping of convex bulges, grooves, and injection holes with conical surfaces on the strip by the synergistic action of precision-machined upper and lower dies. This structure simplifies the production process, reduces the number of dies and process changeover time, and significantly improves production efficiency and product consistency. At the same time, the step-by-step stamping of the pre-forming convex dies and the forming convex dies effectively avoids material stress concentration and reduces the risk of workpiece deformation and cracking.

[0006] Furthermore, the lower end of the forming punch is provided with a first protrusion and a second protrusion in sequence. When the forming punch is pressed down, it drives the first protrusion and the second protrusion to punch the strip. The groove is finally formed by the punching of the first protrusion, and at the same time, the second protrusion punches out a conical groove at the lower end between the groove and the injection hole.

[0007] Through the above improvements, the forming punch has a first punch and a second punch. The first punch completes the final forming of the groove, while the second punch punches a tapered groove between the groove and the injection hole, so that the edge of the injection hole forms a large tapered structure with a smooth transition, which enhances the sealing performance and service life and avoids the risk of cracking caused by stress concentration.

[0008] Furthermore, a limiting protrusion is provided at the lower end of the second protrusion. When the forming punch and the forming die are closed, the limiting protrusion extends into the injection hole and abuts against the inner wall of the injection hole.

[0009] Through the above improvements, a limiting protrusion is set at the lower end of the second protrusion. During the mold closing process, the limiting protrusion extends into the injection hole and abuts against the inner wall, which plays a role in precise positioning and guidance, preventing the material strip from shifting or deforming during the stamping process, and ensuring the consistency of the taper of the injection hole and the molding quality.

[0010] Furthermore, the upper end of the preforming die is provided with a forming cavity, the preforming punch punches the upper end of the strip to form the pressure groove, and the lower end of the strip is extruded toward the preforming die to form the protrusion in the forming cavity.

[0011] Through the above improvements, when the preforming punch presses the strip, the lower end of the strip is squeezed in the forming cavity to form a bulge, realizing the simultaneous forming of the groove and the bulge in one step, simplifying the process steps, improving material utilization, and reducing equipment investment and maintenance costs.

[0012] Furthermore, the forming die includes a die fixing block and a die floating block. The upper end of the die floating block is provided with a counter-pressure protrusion ring, and a receiving groove is formed between the counter-pressure protrusion rings. The forming punch presses the strip, the strip abuts against the die floating block, the receiving groove abuts against the protrusion, and the counter-pressure protrusion ring forms a concave ring on the strip.

[0013] Through the above improvements, the concave ring structure is formed during stamping by the cooperation of the concave die float and the counter-pressure convex ring, and it presses against the convex ring, so that the strip is subjected to uniform force during the forming process, reducing defects caused by uneven material flow, and improving the surface quality and structural stability of the product.

[0014] Furthermore, a floating rod is provided at the lower end of the die float. One end of the floating rod is fixedly mounted on the lower die base, and the other end passes through the die fixing block and abuts against the lower end face of the die float. A floating cylinder is provided at the lower end of the floating rod. The floating cylinder drives the floating rod to move up and down, thereby causing the die float to move up and down. When the forming punch and the forming die are closed, the die float is made to fully contact the strip.

[0015] Through the above improvements, the floating rod driven by the floating cylinder allows the die float to move up and down, adapting to strips of different thicknesses or states. This ensures that the die float and the strip are in full contact when the mold is closed, improving the flexibility and adaptability of the molding process, while reducing mold wear and extending its service life. Attached Figure Description

[0016] Figure 1 A schematic diagram of the pre-forming structure of a molding device for a large-tapered injection hole top cover; Figure 2 A schematic diagram of the molding process (mold opening) of a molding device for a large-tapered injection hole top cover; Figure 3 This is a schematic diagram of the molding process (mold closing) of a molding device for a large-tapered injection hole top cover. Figure 4 A state diagram of the pre-forming process of a molding device for a large-tapered injection hole top cover; Figure 5 A state diagram of the molding process of a molding device for a large-tapered injection hole top cover; Figure 6 A flowchart of a forming device for a large-tapered injection hole top cover; Figure 7 This is a structural diagram of a molding device for a large-tapered injection hole top cover.

[0017] Among them, 1. Precision machined upper mold; 1.1 Upper mold base; 1.2 Upper template; 1.3 Stripper plate; 1.4 Pre-forming punch; 1.5 Forming punch; 1.51 First punch; 1.52 Second punch; 1.53 Limiting punch; 2. Precision machined lower mold; 2.1 Lower mold base; 2.2 Lower template; 2.3 Lower backing plate; 2.4 Pre-forming die; 2.41 Forming cavity; 2.5 Forming die; 2.51 Die fixing block; 2.52 Die floating block; 2.53 Counter-pressure punch ring; 2.54 Accommodating groove; 2.6 Floating rod; 2.61 Floating cylinder; 3. Material strip; 3.1 convex bulge; 3.2 Pressure groove; 3.3 Injection hole; 3.4 Conical groove; 3.5 Concave ring. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] like Figures 1 to 7 As shown, a forming device for a top cover with a large taper injection hole 3.3 includes a finishing upper mold 1, a finishing lower mold 2, and a strip 3. The finishing upper mold 1 includes an upper mold base 1.1, an upper template 1.2, a stripper plate 1.3, a pre-forming punch 1.4, and a forming punch 1.5. The finishing lower mold 2 includes a lower mold base 2.1, a lower template 2.2, and a lower pad 2.3. The lower template 2.2 is provided with a pre-forming die 2.4 and a forming die 2.5. The strip 3 is installed on the lower template 2.2. The upper template 1.2 moves downward toward the lower template 2.2, driving the pre-forming punch 1.4 to press the strip 3, forming a protrusion 3.1 and a groove 3.2 on the strip 3. The forming punch 1.5 presses the groove 3.2 on the strip 3, punching an injection hole 3.3 on the strip 3.

[0021] The lower end of the forming punch 1.5 is provided with a first protrusion 1.51 and a second protrusion 1.52. When the forming punch 1.5 is pressed down, the first protrusion 1.51 and the second protrusion 1.52 drive the material strip 3 to punch. The groove 3.2 is finally formed by the punching of the first protrusion 1.51. At the same time, the second protrusion 1.52 punches out a tapered groove 3.4 at the lower end between the groove 3.2 and the injection hole 3.3, so that the edge of the injection hole 3.3 forms a large tapered structure with a smooth transition, which enhances the sealing performance and service life and avoids the risk of cracking caused by stress concentration.

[0022] The lower end of the second protrusion 1.52 is provided with a limiting protrusion 1.53. When the forming punch 1.5 and the forming die 2.5 are closed, the limiting protrusion 1.53 extends into the injection hole 3.3 and abuts against the inner wall of the injection hole 3.3. The limiting protrusion 1.53 at the lower end of the second protrusion 1.52 extends into the injection hole 3.3 and abuts against the inner wall during the mold closing process, which plays a role in precise positioning and guidance, preventing the material strip 3 from shifting or deforming during the stamping process, and ensuring the consistency of the taper of the injection hole 3.3 and the forming quality.

[0023] The preforming die 2.4 has a forming cavity 2.41 at its upper end. The preforming punch 1.4 punches the upper end of the strip 3 to form a groove 3.2. The lower end of the strip 3 is extruded toward the preforming die 2.4 to form a protrusion 3.1 in the forming cavity 2.41. When the preforming punch 1.4 punches the strip 3, the lower end of the strip 3 is extruded in the forming cavity 2.41 to form the protrusion 3.1. This achieves simultaneous forming of the groove 3.2 and the protrusion 3.1 in one step, which simplifies the process steps, improves the material utilization rate, and reduces equipment investment and maintenance costs.

[0024] The forming die 2.5 includes a die fixing block 2.51 and a die float 2.52. A counter-pressure protrusion ring 2.53 is provided at the upper end of the die float 2.52, and a receiving groove 2.54 is formed between the counter-pressure protrusion rings 2.53. The forming punch 1.5 presses the strip 3, the strip 3 abuts against the die float 2.52, and the receiving groove 2.54 abuts against the protrusion 3.1. The counter-pressure protrusion ring 2.53 forms a concave ring 3.5 on the strip 3. Through the cooperation of the die float 2.52 and the counter-pressure protrusion ring 2.53, a concave ring 3.5 structure is formed during the stamping process, and it abuts against the protrusion 3.1, so that the strip 3 is subjected to uniform force during the forming process, reducing defects caused by uneven material flow, and improving the surface quality and structural stability of the product.

[0025] A floating rod 2.6 is provided at the lower end of the die float 2.52. One end of the floating rod 2.6 is fixed on the lower die base 2.1, and the other end passes through the die fixing block 2.51 and abuts against the lower end face of the die float 2.52. A floating cylinder 2.61 is provided at the lower end of the floating rod 2.6. The floating cylinder 2.61 drives the floating rod 2.6 to move up and down, which in turn drives the die float 2.52 to move up and down. When the forming punch 1.5 and the forming die 2.5 are closed, the die float 2.52 is in full contact with the strip 3. By driving the floating rod 2.6 through the floating cylinder 2.61, the die float 2.52 can move up and down, adapting to strips 3 of different thicknesses or states. This ensures that the die float 2.52 and the strip 3 are in full contact when the die is closed, improving the flexibility and adaptability of the forming process, while reducing die wear and extending service life.

[0026] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A molding device for a large-tapered injection hole top cover, characterized in that: The assembly includes a finishing upper die (1), a finishing lower die (2), and a strip (3). The finishing upper die (1) includes an upper die base (1.1), an upper template (1.2), a stripper plate (1.3), a pre-forming punch (1.4), and a forming punch (1.5). The finishing lower die (2) includes a lower die base (2.1), a lower template (2.2), and a lower backing plate (2.3). The lower template (2.2) contains a pre-forming die (2.4) and a forming die (2.5). 2.5) The strip (3) is installed on the lower template (2.2). The upper template (1.2) moves downward toward the lower template (2.2) and drives the pre-forming punch (1.4) to punch the strip (3) to form a protrusion (3.1) and a groove (3.2) on the strip (3). The forming punch (1.5) punches the groove (3.2) of the strip (3) to punch out a liquid injection hole (3.3) with a conical surface on the strip (3).

2. The forming device for a large-tapered injection hole top cover according to claim 1, characterized in that: The lower end of the forming punch (1.5) is provided with a first protrusion (1.51) and a second protrusion (1.52). When the forming punch (1.5) presses down, it drives the first protrusion (1.51) and the second protrusion (1.52) to punch the strip (3). The pressure groove (3.2) is finally formed by the punching of the first protrusion (1.51). At the same time, the second protrusion (1.52) punches out a conical groove (3.4) at the lower end between the pressure groove (3.2) and the injection hole (3.3).

3. The forming device for a large-tapered injection hole top cover according to claim 2, characterized in that: The lower end of the second protrusion (1.52) is provided with a limiting protrusion (1.53). When the forming punch (1.5) and the forming die (2.5) are closed, the limiting protrusion (1.53) extends into the injection hole (3.3) and abuts against the inner wall of the injection hole (3.3).

4. The forming device for a large-tapered injection hole top cover according to claim 1, characterized in that: The preforming die (2.4) has a forming cavity (2.41) at its upper end. The preforming punch (1.4) punches the upper end of the strip (3) to form the pressure groove (3.2). The lower end of the strip (3) is extruded toward the preforming die (2.4) to form the protrusion (3.1) in the forming cavity (2.41).

5. The forming device for a large-tapered injection hole top cover according to claim 1, characterized in that: The forming die (2.5) includes a die fixing block (2.51) and a die float (2.52). The upper end of the die float (2.52) is provided with a counter-pressure convex ring (2.53). A receiving groove (2.54) is formed between the counter-pressure convex rings (2.53). The forming punch (1.5) punches the strip (3). The strip (3) abuts against the die float (2.52). The receiving groove (2.54) abuts against the convex ring (3.1). The counter-pressure convex ring (2.53) forms a concave ring (3.5) on the strip (3).

6. The forming device for a large-tapered injection hole top cover according to claim 5, characterized in that: A floating rod (2.6) is provided at the lower end of the die float (2.52). One end of the floating rod (2.6) is fixedly mounted on the lower die base (2.1), and the other end passes through the die fixing block (2.51) and abuts against the lower end face of the die float (2.52). A floating cylinder (2.61) is provided at the lower end of the floating rod (2.6). The floating cylinder (2.61) drives the floating rod (2.6) to move up and down, thereby driving the die float (2.52) to move up and down. When the forming punch (1.5) and the forming die (2.5) are closed, the die float (2.52) is in full contact with the strip (3).

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