Efficient stamping die

Abstract

The utility model discloses an efficient stamping die, which relates to the technical field of dies and comprises an upper die holder and a lower die holder. A first driving device is installed on the upper die base, an upper die plate is arranged at the lower end of the upper die base, the movable end of the first driving device penetrates through the upper die base to be connected with the upper die plate, an upper die core is arranged at the lower end of the upper die plate, a first elastic element is arranged between the upper die core and the upper die plate, a top plate is further arranged between the upper die plate and the upper die core, and the lower end of the top plate is connected with a punch. A through hole is formed in the upper die core; the lower end of the punch extends into the through hole; a fixing base is arranged at the upper end of the lower die base, a lower die plate is arranged at the upper end of the fixing base, a lower die core is installed on the lower die plate, a waste material hole is formed in the lower die core, a die groove is formed in the lower die core, a cambered surface protruding structure matched with the radian of a workpiece is arranged in the die groove, and a cambered surface inwards-concave structure is arranged at the lower end of the upper die core. And the sequence of shaping and punching is adopted, so that deformation of punched hole sites due to deep drawing of materials is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a high-efficiency stamping mold. Background Technology

[0002] A stamping die is a tool used for forming and processing sheet metal. By applying high pressure, the sheet metal is plastically deformed according to the shape of the die, thereby producing parts of various shapes and sizes. A stamping die typically consists of an upper die (punch) and a lower die (cavity). When they are closed, the material between them is pressed and formed into the desired shape.

[0003] Stamping processes include blanking, deep drawing, forming, punching, etc., among which... Figure 1 The circular workpiece shown has an upwardly convex arc-shaped structure with a through hole at the center and a semi-circular notch along the edge. Processing this workpiece requires deep drawing and punching of the sheet metal. To prevent deformation of the through hole at the center and the semi-circular notch, a progressive die is typically used. After blanking and deep drawing, the workpiece is conveyed to the next punching operation for punching. This ensures that the punched workpiece can be directly removed, thus avoiding deformation of the through hole and the semi-circular notch. Alternatively, different dies can be used to form the workpiece. However, the design and manufacture of progressive dies are complex and costly, and due to their complex structure, maintenance and repair costs are also relatively high. Using different dies to form the workpiece also results in low production efficiency.

[0004] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency stamping die, comprising an upper die base and a lower die base connected by guide pillars;

[0007] A first driving device is installed on the upper mold base. An upper template is provided at the lower end of the upper mold base. The movable end of the first driving device passes through the upper mold base and is connected to the upper template. An upper mold core is provided at the lower end of the upper template. A first elastic element is provided between the upper mold core and the upper template. A top plate is also provided between the upper template and the upper mold core. A punch is connected at the lower end of the top plate. A through hole is opened on the upper mold core. The lower end of the punch extends into the through hole.

[0008] The lower die base is provided with a fixed seat at its upper end, and a lower template is provided at the upper end of the fixed seat. A lower die core is installed on the lower template. A scrap hole corresponding to the punch is opened on the lower die core. The scrap hole passes through the lower template, the fixed seat, and the lower die base. A die groove is formed on the lower die core. The die groove has an arc-shaped protrusion structure that matches the curvature of the workpiece. The lower end of the upper die core has an arc-shaped concave structure that matches the arc-shaped protrusion structure.

[0009] As a further embodiment of this utility model: a second driving device is installed at the upper end of the upper template, and the movable end of the second driving device passes through the upper template and is connected to the top plate.

[0010] As a further embodiment of this utility model: a clearance hole is provided on the top plate;

[0011] The lower end of the upper template is provided with a stop sleeve that cooperates with the clearance hole. The lower end of the stop sleeve protrudes through the clearance hole, and the upper end of the first elastic element is located inside the stop sleeve and connected to the upper template.

[0012] As a further embodiment of this utility model, it also includes a pressure ring with a hollow structure disposed at the lower end of the upper template. The pressure ring is movably surrounded on the upper mold core through the hollow structure, and a second elastic element is provided between the upper end of the pressure ring and the upper template.

[0013] As a further embodiment of this utility model: the lower mold core is also provided with an ejection hole, the fixed base is equipped with an ejection drive device, the movable end of the ejection drive device is connected to an ejection rod, and the ejection rod is located inside the ejection hole.

[0014] As a further embodiment of this utility model: the upper end of the upper template is connected to several guide rods, the upper mold base is provided with a guide groove, the guide groove is provided with a guide sleeve, and the guide rods and guide sleeves are guided and cooperate with each other and extend to the upper end of the upper mold base.

[0015] Compared with the prior art, the beneficial effects of this technical solution are as follows: The first driving device pushes the upper template to drive the upper mold core and the lower mold core to close the mold, so that the upper mold core punches and blanks the sheet metal. Then, with continuous downward pressure, the upper mold core and the lower mold core draw the sheet metal into an arc shape through the arc-shaped protrusion structure and the arc-shaped concave structure. At this time, the upper mold core and the lower mold core close the mold to each other, while the first driving device continues to push the upper template, so that the upper template compresses the first elastic element between the upper template and the upper mold core. At the same time, the upper template pushes the top plate to drive multiple punches to press down and pass through the through hole, and punch the workpiece which is now arc-shaped, so as to achieve the effect of shaping and punching in a single punching. By shaping first and then punching, the punched hole position is avoided due to the deep drawing of the material. This not only has a good processing effect and high efficiency, but also reduces the investment cost.

[0016] When the upper die core stops punching the sheet metal due to the obstruction of the sheet metal, the upper die plate continues to press down, compressing the first elastic element. When the upper die core and the upper die plate come into contact, or when the first elastic element can no longer be compressed, the upper die core can punch the sheet metal into the required shape. Then, the upper die plate and the upper die core press the sheet metal while they are in contact (or relatively stationary). The sheet metal is drawn and shaped into an arc shape by using the arc-shaped protrusion structure and the arc-shaped concave structure. Then, the top plate is pushed by the second drive device. The top plate drives the punch to punch the sheet metal through the through hole, thereby maintaining the normal processing sequence and ensuring that it can adapt to the thicker sheet metal.

[0017] The stop sleeve protrudes through the relief hole, so that when the upper die core presses against the stop sleeve, there is still a movable space between the top plate and the upper die core, so that the second drive device can push the top plate down, and the top plate pushes the punch down to protrude through the through hole to perform punching operation on the sheet metal.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the workpiece structure in this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 yes Figure 2 Enlarged schematic diagram of a local structure at point A;

[0023] The corresponding labels in the attached diagram are explained as follows:

[0024] 1. Upper mold base; 2. Lower mold base; 3. First drive device; 4. Upper template; 5. Upper mold core; 6. First elastic element; 7. Ejector plate; 8. Punch; 9. Through hole; 10. Fixed base; 11. Lower template; 12. Lower mold core; 13. Scrap hole; 14. Arc-shaped raised structure; 15. Arc-shaped concave structure; 16. Second drive device; 17. Pressure ring; 18. Second elastic element; 19. Relief hole; 20. Stop sleeve; 21. Guide rod; 22. Guide sleeve; 23. Ejection hole; 24. Ejection drive device; 25. Ejection rod. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-3 A high-efficiency stamping die includes an upper die holder (1) and a lower die holder (2) connected by guide pillars.

[0027] Example 1:

[0028] A first driving device 3 is installed on the upper mold base 1. An upper template 4 is provided at the lower end of the upper mold base 1. The movable end of the first driving device 3 passes through the upper mold base 1 and is connected to the upper template 4. An upper mold core 5 is provided at the lower end of the upper template 4. A first elastic element 6 is provided between the upper mold core 5 and the upper template 4. A top plate 7 is also provided between the upper template 4 and the upper mold core 5. A punch 8 is connected to the lower end of the top plate 7. A through hole 9 is opened on the upper mold core 5. The lower end of the punch 8 extends into the through hole 9.

[0029] The lower die base 2 is provided with a fixed seat 10 at the upper end, and a lower template 11 is provided at the upper end of the fixed seat 10. A lower die core 12 is installed on the lower template 11. A scrap hole 13 corresponding to the punch 8 is opened on the lower die core 12. The scrap hole 13 passes through the lower template 11, the fixed seat 10 and the lower die base 2. A die groove is formed on the lower die core 12. The die groove has an arc-shaped protrusion structure 14 that matches the curvature of the workpiece. The lower end of the upper die core 5 has an arc-shaped concave structure 15 that matches the arc-shaped protrusion structure 14.

[0030] Specifically, in the first embodiment, the sheet material to be processed is placed on the lower template 11. The upper template 4 is pushed by the first driving device 3, and the upper template 4 drives the upper mold core 5 and the lower mold core 12 to close the mold. During the mold closing process, the sheet material is punched and blanked (i.e., a suitable round sheet material is punched out). Then, with continuous downward pressure, the upper mold core 5 presses the sheet material into the mold groove of the lower mold core 12, and the sheet material is drawn and shaped into an arc shape by the arc-shaped protrusion structure 14 and the matching arc-shaped concave structure 15. At this time, the upper mold core 5 and the lower mold core 12 close the mold with each other, while the first driving device 3 continues to push the upper template. 4. The upper template 4 is compressed with the first elastic element 6 between the upper mold core 5 and the upper mold core 5, so that the upper mold core is kept in a static state with the lower mold core 12 closed. The upper template 4 pushes the top plate 7, and the top plate 7 drives multiple punches 8 to press down, so that multiple punches 8 pass through the through hole 9 of the upper mold core 5 and punch the workpiece that has been drawn and shaped into an arc shape by the upper mold core 5 and the lower mold core 12. This achieves the effect of completing the shaping and punching in a single punching. The order of shaping first and then punching avoids the deformation of the punched hole due to the drawing of the material. This not only has a good processing effect and high efficiency, but also reduces the input cost.

[0031] Preferably, the initial position of the punch 8 should be inside the perforation 9, and there should be a certain distance from the opening of the perforation 9. The function is that when the upper mold core 5 and the lower mold core 12 are closed and the plate is pressed down, the continuous downward pressure of the upper mold plate 4 can drive the punch 8 to press down a certain distance, so as to improve the power of the punch 8, make the punching of the punch 8 smoother, and reduce the burrs on the edge of the hole.

[0032] Furthermore, the scrap hole 13 is positioned to cooperate with the punch 8, and the scrap hole 13 passes through the lower template 11, the fixed seat 10 and the lower die seat 2. After the punch 8 cuts off the material on the plate, it can fall through the scrap hole 13 to the bottom of the lower die seat 2 for collection by the staff.

[0033] Furthermore, the first elastic element 6 is a high-strength spring, and the force required for its compression is greater than the force required for the upper die core 5 to punch the sheet metal, so as to avoid the upper die core 5 stopping when punching the sheet metal, which would cause the punch 8 to prematurely protrude through the perforation 9.

[0034] In this embodiment, it is further proposed that a pressure ring 17 with a hollow structure is provided at the lower end of the upper template 4. The pressure ring 17 is movably surrounded on the upper mold core 5 through the hollow structure, and a second elastic element 18 is provided between the upper end of the pressure ring 17 and the upper template 4.

[0035] When the first driving device 3 pushes the upper template 4 and the upper die core 5 down, the clamping ring 17 surrounding the upper die core 5 also contacts the plate and, with continuous downward pressure, clamps the plate to prevent displacement of the plate when the upper die core 5 punches the plate, which would cause deviation in the punching dimensions. The second elastic element 18 is used to create a retractable space between the clamping ring 17 and the upper template 4. Thus, when the upper template 4 drives the upper die core to continuously press down, the upper template 4 squeezes the second elastic element 18, and the clamping ring 17 can maintain continuous pressure and remain stationary.

[0036] Example 2:

[0037] When the sheet metal is thick, the upper template 4 and upper die 5 pushed by the first driving device 3 press down on the sheet metal. The upper die 5 contacts and punches the sheet metal. The force required for punching is greater than the compressive force generated by the first elastic element 6, which makes it temporarily impossible for the upper die 5 to directly complete the punching of the sheet metal. At this time, the punch 8 in the perforation 9 contacts the sheet metal in advance before the sheet metal is drawn and shaped, resulting in an error in the processing sequence and thus causing problems with the quality of the workpiece.

[0038] Preferably, in this embodiment, a second driving device 16 is installed on the upper end of the upper template 4, and the movable end of the second driving device 16 passes through the upper template 4 and is connected to the top plate 7.

[0039] When the upper die core 5 contacts and punches the sheet metal, the upper die core 5 stops due to the obstruction of the sheet metal. The upper template 4 continues to press down, compressing the first elastic element 6. After the upper die core 5 abuts against the upper template, or when the first elastic element 6 can no longer be compressed, the upper die core 5 can punch the sheet metal into the required shape. Then, the upper template 4 and the upper die core 5 press the sheet metal while maintaining abutment (or relative stillness). The sheet metal is drawn and shaped into an arc shape using the arc-shaped protrusion structure 14 and the arc-shaped concave structure 15. Then, the top plate 7 is pushed by the second drive device 16. The top plate 7 drives the punch 8 through the through hole 9 to punch the sheet metal, thereby maintaining the normal processing sequence and ensuring that it can adapt to the thicker sheet metal.

[0040] In this embodiment, the distance between the punch 8 and the through hole should be greater than the distance between the upper mold core 5 and the upper template 4, so as to avoid the punch 8 from prematurely penetrating the through hole when the upper mold core 5 and the upper template 4 are close.

[0041] In this embodiment, it is further proposed that a clearance hole 19 is provided on the top plate 7;

[0042] The lower end of the upper template 4 is provided with a stop sleeve 20 that cooperates with the relief hole 19. The lower end of the stop sleeve 20 protrudes from the relief hole 19, and the upper end of the first elastic element 6 is located inside the stop sleeve 20 and connected to the upper template 4.

[0043] As the upper die core 5 and the upper template 4 approach each other, the stop sleeve 20 can hold the upper die core 5 in place. Then, the upper die core 5 punches the sheet metal. The opening of the relief hole 19 ensures that the movement of the top plate 7 is not affected by the stop sleeve 20. Since the stop sleeve 20 protrudes through the relief hole 19, there is still a movable space between the top plate 7 and the upper die core 5 when the upper die core 5 holds the stop sleeve 20. This allows the second drive device 16 to push the top plate 7 down, and the top plate 7 pushes the punch 8 down to protrude through the through hole 9 to punch the sheet metal.

[0044] A positioning rod can be provided on the upper mold core 5, and a positioning hole corresponding to the positioning rod is provided on the upper template 4. The positioning rod can pass through the first elastic element 6 and the stop sleeve 20 and then pass through the positioning hole to protrude from the top plate of the upper template 4, so that the upper mold core 5 maintains directional movement when it is displaced.

[0045] Preferably, the upper end of the upper template 4 is connected with several guide rods 21, the upper mold base 1 is provided with a guide groove, and a guide sleeve 22 is provided on the guide groove. The guide rods 21 and the guide sleeve 22 guide and cooperate and extend to the upper end of the upper mold base 1.

[0046] When the first driving device 3 pushes the upper template 4 down or moves the upper template 4 up, the directional cooperation between the guide rod 20 and the guide sleeve 22 can provide guidance and restriction for the upper template 4, ensuring that the movement path of the upper template 4 remains straight.

[0047] Preferably, the lower mold core 12 is also provided with an ejection hole 23, and an ejection drive device 24 is installed inside the fixed base 10. The movable end of the ejection drive device 24 is connected to an ejection rod 25, and the ejection rod 25 is located inside the ejection hole 23.

[0048] After the workpiece is processed, the first drive device 3 drives the upper template 4 to move upward, and the upper mold core 5 follows the upper template 4 to separate from the lower mold core 12. Then, the ejection drive device 24 pushes the ejection rod 25 located inside the ejection hole 23. The ejection rod 25 protrudes through the ejection hole 23 and pushes the workpiece located in the mold groove, so that the workpiece moves upward, so as to facilitate the removal and unloading of the processed workpiece.

[0049] In this utility model, the first driving device 3, the second driving device 16, and the ejection driving device 24 all adopt hydraulic or electric driving methods (such as hydraulic cylinders), which can provide stable power output, and will not be described in detail here.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-efficiency stamping die, characterized in that, It includes an upper mold base (1) and a lower mold base (2) connected by guide pillars; The upper mold base (1) is equipped with a first driving device (3), and the lower end of the upper mold base (1) is provided with an upper template (4). The movable end of the first driving device (3) passes through the upper mold base (1) and is connected to the upper template (4). The lower end of the upper template (4) is provided with an upper mold core (5). A first elastic element (6) is provided between the upper mold core (5) and the upper template (4). A top plate (7) is also provided between the upper template (4) and the upper mold core (5). A punch (8) is connected to the lower end of the top plate (7). A through hole (9) is opened on the upper mold core (5). The lower end of the punch (8) extends into the through hole (9). The lower die base (2) is provided with a fixed seat (10) at the upper end. The fixed seat (10) is provided with a lower template (11) at the upper end. The lower template (11) is provided with a lower die core (12). The lower die core (12) is provided with a scrap hole (13) corresponding to the punch (8). The scrap hole (13) passes through the lower template (11), the fixed seat (10) and the lower die base (2). The lower die core (12) is formed with a mold groove. The mold groove has an arc surface protrusion structure (14) that matches the curvature of the workpiece. The lower end of the upper die core (5) has an arc surface concave structure (15) that matches the arc surface protrusion structure (14).

2. The high-efficiency stamping die according to claim 1, characterized in that, The upper end of the upper template (4) is equipped with a second driving device (16), and the movable end of the second driving device (16) passes through the upper template (4) and is connected to the top plate (7).

3. The high-efficiency stamping die according to claim 2, characterized in that, The top plate (7) is provided with a clearance hole (19); The lower end of the upper template (4) is provided with a stop sleeve (20) that cooperates with the relief hole (19). The lower end of the stop sleeve (20) protrudes through the relief hole (19), and the upper end of the first elastic element (6) is located inside the stop sleeve (20) and connected to the upper template (4).

4. The high-efficiency stamping die according to any one of claims 1-3, characterized in that, It also includes a pressure ring (17) with a hollow structure set at the lower end of the upper template (4). The pressure ring (17) is movably surrounded on the upper mold core (5) through the hollow structure, and a second elastic element (18) is provided between the upper end of the pressure ring (17) and the upper template (4).

5. The high-efficiency stamping die according to claim 4, characterized in that, The lower mold core (12) is also provided with an ejection hole (23), and an ejection drive device (24) is installed inside the fixed base (10). The movable end of the ejection drive device (24) is connected to an ejection rod (25), and the ejection rod (25) is located inside the ejection hole (23).

6. The high-efficiency stamping die according to claim 4, characterized in that, The upper template (4) is connected to several guide rods (21), the upper mold base (1) is provided with a guide groove, the guide groove is provided with a guide sleeve (22), the guide rods (21) and the guide sleeve (22) are guided and cooperate and extend to the upper end of the upper mold base (1).

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