Production die for clamping reed of cooling pipeline of electric automobile

Abstract

The utility model discloses a production die for a clamping reed of a cooling pipeline of an electric automobile. The production die comprises an upper die assembly and a lower die assembly, the upper die assembly is provided with an upper die plate, and the upper die plate is provided with a positioning hole punch, a plurality of forming punches and a cutting punch. A material pushing punch assembly; the material pushing punch assembly is arranged on the upper die plate. A lower die assembly; a lower mold plate is arranged on the lower mold assembly; a blanking hole for blanking the reed workpiece is formed in the lower die plate; the stamping die has the advantages that the right-angle bent protruding plate is formed on the material belt in a stamping mode through the introduction of the material pushing punch assembly, the tail end of the bent protruding plate extends to the position above the blanking hole and is not in contact with the lower die plate, and after the punch is cut off to complete workpiece separation, the material belt continuously drives the bent protruding plate in a stepping mode to do translational motion; and the separated reed workpiece is accurately pushed into the blanking hole by virtue of the rigid pushing action, so that the material blocking problems of retention, deflection and the like caused by insufficient dead weight or structural interference of the workpiece in the traditional die are thoroughly eliminated.

Description

Technical Field

[0001] This utility model relates to a production mold for clamping springs in the cooling pipes of electric vehicles. Background Technology

[0002] With the rapid development of electric vehicle technology, the application of high-power motors and controllers has placed higher demands on cooling systems. As the core carrier of the heat dissipation system, the reliability of the cooling pipes directly affects the safety performance of the entire vehicle. Traditional fixing methods generally use bolt and nut fastening structures, which can achieve basic fixing functions, but have inherent defects such as cumbersome installation procedures (requiring multiple points of tightening) and susceptibility to corrosion leading to loosening later. In severe cases, this may cause safety hazards such as pipe displacement or even coolant leakage.

[0003] To address these issues, the industry is gradually replacing traditional bolt structures with integrated, molded elastic clamping springs. These springs are produced continuously using stamping dies and offer significant advantages such as convenient installation, shock resistance, anti-loosening properties, and corrosion resistance. However, in actual production, existing stamping dies face significant technical bottlenecks: due to the small size, light weight, and complex structure of the spring workpieces, they are prone to failing to detach naturally after stamping due to insufficient weight, or becoming misaligned due to interference from the die structure, leading to frequent problems such as workpiece retention and jamming. This not only reduces production efficiency but also causes die damage and a decrease in product qualification rate, severely restricting the demand for large-scale production.

[0004] While existing technologies have attempted to improve the material feeding effect by adding an air blowing device, such solutions have problems such as increased structural complexity, increased equipment costs, and the risk of blowing the spring workpiece away. Especially under high-speed continuous stamping conditions, the response speed of the auxiliary mechanism is difficult to match the production cycle precisely, which may lead to secondary jamming or workpiece damage. In view of this, this utility model proposes a production mold for clamping springs in electric vehicle cooling pipes to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a production mold for clamping springs in electric vehicle cooling pipes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A production mold for clamping springs in electric vehicle cooling pipes, used to stamp strip material to form spring workpieces, comprising:

[0008] Upper die assembly; the upper die assembly is provided with an upper template, the upper template is provided with a positioning hole punch, a multi-stage forming punch and a cutting punch; the positioning hole punch, the multi-stage forming punch and the cutting punch are arranged sequentially along the process reference axis from the input end to the output end of the strip;

[0009] A pusher punch assembly; the pusher punch assembly is disposed on the upper template; the pusher punch assembly is disposed between the multi-stage forming punch and the cutting punch;

[0010] The lower mold assembly is provided with a lower template; the lower template is provided with a blanking hole for blanking the spring sheet workpiece.

[0011] The material strip is intermittently stepped and slidably disposed on the lower template, so that the same position of the material strip comes into contact with the positioning hole punch, the multi-pass forming punch, the push punch assembly and the cutting punch in sequence to generate process interference and form a spring workpiece.

[0012] The pusher punch assembly contacts the strip, causing a bent protrusion to form on the strip that pushes the spring workpiece into the drop hole.

[0013] As an improvement to the above technical solution, the positioning hole punch is used to form positioning holes on the strip.

[0014] The multi-pass forming punch is used to form the spring workpiece on the strip.

[0015] The cutting punch is used to separate the formed spring workpieces on the strip and cut off the remaining material.

[0016] As an improvement to the above technical solution, the lower template is provided with a die structure that matches the positioning hole punch, the multi-stage forming punch, the pusher punch assembly, and the cutting punch.

[0017] As an improvement to the above technical solution, the pusher punch assembly includes a first pusher punch and a second pusher punch, and the first pusher punch and the second pusher punch are sequentially arranged on the upper template along the process reference axis from the input end to the output end of the material strip.

[0018] As an improvement to the above technical solution, the first pusher punch is used to form two sets of C-shaped grooves on the strip that are adapted to the position of the spring workpiece.

[0019] The second pusher punch is used to press the middle part of the C-groove into the lower part of the strip to form a bent protrusion plate.

[0020] As an improvement to the above technical solution, the C-groove is provided on the side of the reed workpiece facing the feed strip input end.

[0021] As an improvement to the above technical solution, an inclined guide slope is provided at the opening of the material discharge hole.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By introducing a pusher punch assembly to stamp a right-angle bent protrusion on the strip, the end of the bent protrusion extends above the blanking hole and does not contact the lower die. After the cutting punch completes the separation of the workpiece, the strip continues to step forward, driving the bent protrusion to make a translational movement. With its rigid pushing action, the separated spring workpiece is accurately pushed into the blanking hole, completely eliminating the jamming problems such as retention and skewing caused by insufficient workpiece weight or structural interference in traditional molds.

[0024] By integrating the pusher punch assembly between the multi-stage forming punch and the cutting punch, the pusher structure is immediately constructed after the spring workpiece is formed, without the need to add an independent drive mechanism. Through the coordinated conversion of the material strip stepping kinetic energy and the stamping deformation energy, the timing coupling of the "forming-pushing-unloading" action is realized, which greatly shortens the production cycle and achieves fully automatic and efficient production.

[0025] By sequentially arranging positioning hole punches, multi-stage forming punches, and cutting punches along the process reference axis, and cooperating with an intermittent stepping feeding mechanism, the material strip completes the establishment of positioning reference, multi-dimensional plastic forming of spring workpieces, and final cutting and separation in stages at the same position, ensuring the consistency of processing accuracy and geometric tolerances of each process, and significantly improving the product qualification rate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0028] Figure 3 This is a schematic diagram of the material strip structure of this utility model;

[0029] Figure 4 This is a schematic diagram showing the positions of the multi-stage forming punch and the material strip of this utility model;

[0030] Figure 5 This is a schematic diagram showing the positions of the pusher punch assembly and the material strip of this utility model;

[0031] Figure 6 This is a schematic diagram showing the positions of the cutting punch and the material strip of this utility model;

[0032] Figure 7 This is a three-dimensional structural diagram of the reed workpiece of this utility model;

[0033] Figure 8 This is a side view of the reed workpiece of this utility model.

[0034] In the diagram: 10. Upper die assembly; 11. Upper template; 20. Lower die assembly; 21. Lower template; 22. Blanking hole; 23. Guide slope; 30. Bending protrusion plate; 40. Spring workpiece; 50. Material strip; 60. Positioning hole punch; 61. C-groove; 70. Multi-pass forming punch; 80. Push punch assembly; 81. First push punch; 82. Second push punch; 90. Cutting punch. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Example:

[0037] like Figure 1-5 As shown, this embodiment proposes a production mold for clamping spring sheets in electric vehicle cooling pipes, used to stamp the strip 50 to form the spring sheet workpiece 40, including:

[0038] Upper mold assembly 10; the upper mold assembly 10 is provided with an upper template 11, the upper template 11 is provided with a positioning hole punch 60, a multi-stage forming punch 70 and a cutting punch 90; the positioning hole punch 60, the multi-stage forming punch 70 and the cutting punch 90 are arranged sequentially along the process reference axis from the input end to the output end of the strip 50;

[0039] A pusher punch assembly 80 is disposed on the upper template 11; the pusher punch assembly 80 is disposed between the multi-pass forming punch 70 and the cutting punch 90.

[0040] The lower mold assembly 20 is provided with a lower template 21; the lower template 21 is provided with a blanking hole 22 for blanking the spring sheet workpiece 40.

[0041] The material strip 50 is intermittently stepped and slidably disposed on the lower template 21, so that the material strip 50 contacts the positioning hole punch 60, the multi-pass forming punch 70, the pushing punch assembly 80 and the cutting punch 90 at the same position to generate process interference, forming the spring workpiece 40.

[0042] The pusher punch assembly 80 contacts the strip 50, causing a bent protrusion 30 to be formed on the strip 50 to push the spring workpiece 40 into the drop hole 22.

[0043] In this embodiment, when producing the reed workpiece 40, the upper die assembly 10 and the lower die assembly 20 are assembled and installed on the stamping machine through guide pillars and guide sleeves to ensure that the positioning hole punch 60, the multi-pass forming punch 70, the push punch assembly 80 and the cutting punch 90 are precisely aligned with the corresponding dies on the lower die plate 21. Then, the strip material 50 is inserted along the process reference axis of the lower die plate 21. The input end of the strip material 50 is fixed to the feeding mechanism (e.g., a clamping feeder), and the output end is connected to the receiving device (e.g., a receiving frame) to form a continuous feeding path.

[0044] After the above is completed, the press drives the upper die assembly 10 to move downwards. The positioning hole punch 60 punches a positioning hole at the first station of the strip 50. The positioning hole serves as the reference for subsequent stations. The feeding mechanism pushes the strip 50 to move in an intermittent stepping manner. The stepping distance is determined by the spacing of the positioning holes, ensuring that the strip 50 passes through each punch station in sequence at the same position.

[0045] Then the strip 50 moves to the bottom of the multi-pass forming punch 70. The multi-pass forming punch 70 punches and bends the strip 50 in stages to form features such as clamping arms and mounting holes of the spring workpiece 40. At this time, the spring workpiece 40 is still integrated with the strip 50 through the connecting part. At the same time, after each punching is completed, the strip 50 moves one station and passes through different stations of the multi-pass forming punch 70 in sequence to gradually complete the precision forming of the spring workpiece 40.

[0046] When the strip 50 enters below the pusher punch assembly 80, the pusher punch assembly 80 punches out a downward bending protrusion 30 on the side of the spring workpiece 40 near the input end of the strip 50, and the end of the bending protrusion 30 extends above the drop hole 22, and the bending protrusion 30 does not contact the lower template 21.

[0047] At the same time, the material strip 50 enters below the cutting punch 90, the cutting punch 90 presses down, cuts off the connection between the spring workpiece 40 and the material strip 50, the workpiece is completely separated, and the material strip 50 continues to step forward, so that the previously formed bent protrusion plate 30 pushes the separated spring workpiece 40 into the dropping hole 22, realizing automatic dropping without jamming.

[0048] By introducing the pusher punch assembly 80, a right-angle bent protrusion plate 30 is formed on the strip 50. The end of the bent protrusion plate 30 extends above the drop hole 22 and does not contact the lower template 21. After the cutting punch 90 completes the separation of the workpiece, the strip 50 continues to step forward, driving the bent protrusion plate 30 to make translational movements. With its rigid pushing action, the separated spring workpiece 40 is accurately pushed into the drop hole 22, completely eliminating the jamming problems such as retention and skewing caused by insufficient workpiece weight or structural interference in traditional molds.

[0049] By integrating the pusher punch assembly 80 between the multi-pass forming punch 70 and the cutting punch 90, the pusher structure is immediately constructed after the spring workpiece 40 is formed, without the need to add an independent drive mechanism. Through the coordinated conversion of the stepping kinetic energy of the strip 50 and the stamping deformation energy, the timing coupling of the "forming-pushing-unloading" action is realized, which greatly shortens the production cycle and achieves fully automatic and efficient production.

[0050] By sequentially arranging the positioning hole punch 60, the multi-pass forming punch 70, and the cutting punch 90 along the process reference axis, and cooperating with the intermittent stepping feeding mechanism, the material strip 50 completes the establishment of the positioning reference, the multi-dimensional plastic forming of the spring workpiece 40, and the final cutting and separation in stages at the same position, ensuring the consistency of processing accuracy and geometric tolerances of each process, and greatly improving the product qualification rate.

[0051] Specifically, the positioning hole punch 60 is used to form positioning holes on the strip 50;

[0052] The multi-pass forming punch 70 is used to form the reed workpiece 40 on the strip 50;

[0053] The cutting punch 90 is used to separate the formed spring workpiece 40 on the strip 50 and cut off the remaining material.

[0054] In this embodiment, by arranging the positioning hole punch 60, the multi-pass forming punch 70 and the cutting punch 90 along the process reference axis, the processes of reference positioning, forming processing and separation blanking are integrated into a single continuous stamping process, maximizing the utilization of the material strip 50, reducing the need for inter-process transfer and secondary positioning, and significantly improving the production cycle and material utilization rate.

[0055] Specifically, the lower template 21 is provided with a die structure that matches the positioning hole punch 60, the multi-pass forming punch 70, the push punch assembly 80, and the cutting punch 90.

[0056] In this embodiment, a closed dynamic fit gap is formed between the die structure and the corresponding punch, so that the blanking force and bending moment are evenly distributed and dynamically compensated during the stamping process, suppressing the plastic deformation deviation caused by local stress concentration in the strip 50, and ensuring that the feature dimensions and geometric tolerances of the positioning holes, spring workpiece 40, and bending protrusion 30 on the strip 50 reach the micron level accuracy.

[0057] Specifically, the pusher punch assembly 80 includes a first pusher punch 81 and a second pusher punch 82, which are sequentially arranged on the upper template 11 along the process reference axis from the input end to the output end of the material strip 50.

[0058] Specifically, the first pusher punch 81 is used to form two sets of C-shaped grooves 61 on the strip 50 that are adapted to the position of the spring workpiece 40;

[0059] The second pusher punch 82 is used to press the middle part of the C-groove 61 into the lower part of the strip 50 to form a bent protrusion 30.

[0060] In this embodiment, the first pusher punch 81 pre-punches two sets of C-shaped grooves 61 on the strip 50 that are strictly corresponding to the position of the spring workpiece 40. The symmetrical grooving design releases local material stress and provides a geometric guide reference for subsequent bending. This avoids bending angle deviation or root cracking caused by uneven material flow during direct punching and bending, ensuring the forming accuracy and structural strength of the bending protrusion plate 30.

[0061] At the same time, the second pusher punch 82 performs a directional pressing action on the middle part of the C-shaped groove 61, and uses the die structure to guide the material to bend along the preset trajectory to form a right-angle bent protrusion plate 30, the end of which extends to the top of the drop hole 22 and does not contact the lower template 21.

[0062] This bending process enables the bending protrusion plate 30 to have both flexible deformation capability and rigid pushing function, and it can withstand continuous pushing reaction force in subsequent stepping processes without plastic springback or breakage.

[0063] Specifically, the C-groove 61 is provided on the side of the reed workpiece 40 facing the input end of the feed strip 50.

[0064] In this embodiment, the C-groove 61 is located on the side of the reed workpiece 40 facing the input end of the strip 50, which can make the pushing action direction of the stamped bending protrusion plate 30 coaxial with the movement direction of the intermittent stepping of the strip 50, so as to push the separated reed workpiece 40 into the dropping hole 22.

[0065] Specifically, the opening of the material discharge hole 22 is provided with an inclined guide slope 23.

[0066] In this embodiment, the guide slope 23 allows the edge of the spring workpiece 40 to contact the guide slope 23, and the workpiece is guided by its slope to automatically adjust its posture and smoothly slide into the dropping hole 22 along the preset path, achieving flexible dropping with zero jamming and no impact.

[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production die for an electric vehicle cooling line clamping spring, for stamping a spring workpiece (40) from a material strip (50), characterized in that: include: Upper die assembly (10); the upper die assembly (10) is provided with an upper template (11), the upper template (11) is provided with a positioning hole punch (60), a multi-stage forming punch (70) and a cutting punch (90); the positioning hole punch (60), the multi-stage forming punch (70) and the cutting punch (90) are arranged sequentially along the process reference axis from the input end to the output end of the strip (50); Pusher punch assembly (80); the pusher punch assembly (80) is disposed on the upper template (11); the pusher punch assembly (80) is disposed between the multi-pass forming punch (70) and the cutting punch (90); The lower mold assembly (20) is provided with a lower template (21); the lower template (21) is provided with a blanking hole (22) for blanking the spring sheet workpiece (40). The strip (50) is intermittently stepped and slidably disposed on the lower template (21), so that the strip (50) contacts the positioning hole punch (60), the multi-pass forming punch (70), the push punch assembly (80) and the cutting punch (90) in sequence at the same position to generate process interference and form a spring workpiece (40). The pusher punch assembly (80) contacts the strip (50), causing a bent protrusion (30) to be formed on the strip (50) to push the spring workpiece (40) into the drop hole (22).

2. The production mold for an electric vehicle cooling pipe clamping spring piece according to claim 1, characterized in that: The positioning hole punch (60) is used to form positioning holes on the strip (50); The multi-pass forming punch (70) is used to form the reed workpiece (40) on the strip (50); The cutting punch (90) is used to separate the formed spring workpiece (40) on the strip (50) and cut off the remaining material.

3. The production mold for an electric vehicle cooling pipe clamping spring piece according to claim 1, characterized in that: The lower template (21) is provided with a die structure that matches the positioning hole punch (60), the multi-pass forming punch (70), the push punch assembly (80), and the cutting punch (90).

4. The production mold for a clamping spring of an electric vehicle cooling line according to claim 3, characterized in that: The pusher punch assembly (80) includes a first pusher punch (81) and a second pusher punch (82). The first pusher punch (81) and the second pusher punch (82) are sequentially arranged on the upper template (11) along the process reference axis from the input end to the output end of the material strip (50).

5. The production mold for an electric vehicle cooling pipe clamping spring piece according to claim 4, characterized by: The first pusher punch (81) is used to form two sets of C-shaped grooves (61) on the strip (50) that are adapted to the position of the spring workpiece (40). The second pusher punch (82) is used to press the middle part of the C-groove (61) into the lower part of the strip (50) to form a bent protrusion plate (30).

6. The production mold for an electric vehicle cooling pipe clamping spring piece according to claim 5, characterized by: The C-groove (61) is located on the side of the reed workpiece (40) facing the input end of the feed strip (50).

7. The production mold for an electric vehicle cooling pipe clamping spring piece according to claim 1, characterized by: The opening of the material drop hole (22) is provided with an inclined guide slope (23).

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