Structure for improving burrs of die punch

Abstract

The utility model provides a structure for improving burrs of a die punch, which relates to the technical field of die processing and comprises a punching machine, and the top of the punching machine is connected with a main machine. According to the utility model, the fixed block with the high-precision dowel pin is used for clamping the punch, so that the problem of linear cutting deviation in processing can be conveniently corrected, the length of the punch is greatly reduced, the installation and maintenance are simple and convenient, and the reduction of the length of the punch can effectively reduce bending deformation in processing and use, so that the perpendicularity and precision of the punch are improved, and the service life of the punch is prolonged. The machining cost is reduced, the burr blanking effect is improved, the double-end auxiliary guide columns can improve the die assembly precision of the upper die and the lower die of the die, meanwhile, the disassembly mode of the stripper plate becomes simple, the maintenance time and cost of the die are effectively reduced, the stripper plate is changed into an insert-free mode, and the die assembly efficiency is improved. Superposition errors caused by insert machining can be effectively reduced; and the lower die plate is changed into a double-layer insert mode, so that the maintenance cost of damaged knife edges can be effectively reduced, and the punching precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold processing, in particular to a structure for improving burrs of a mold punch. Background Art

[0002] Mold manufacturing is a complex process involving multiple steps and key technologies. Through reasonable design, precise processing, strict testing and effective maintenance, we can ensure the quality and life of the mold and meet the needs and requirements of customers.

[0003] Currently, the punching die structure for heat dissipation holes in aluminum laptop cases typically uses a traditional die structure. Specifically, the punch is secured to the upper clamping plate using a lifting lug and a profile. The stripper plate and lower template are embedded with a punch insert. T-shaped auxiliary internal guide pins are used to align and close the upper and lower dies during punching. Because the heat dissipation holes in laptop cases are often slender, closely spaced, and densely distributed, this traditional die structure often suffers from poor verticality after processing due to the slender punch. The wire cutting process for the upper clamping plate, stripper plate, lower template, and insert is extensive, resulting in significant cumulative deviations and extremely high costs. Furthermore, aluminum's low strength makes it prone to heat generation and aluminum powder adhering to the punch during punching. The small spacing between the blades and their low strength indirectly lead to waste material or blade blockage, and the insert is easily damaged, resulting in increased costs. These factors combine to directly result in large burrs and deformed holes in the heat dissipation holes of aluminum cases, often resulting in unsatisfactory appearance. At the same time, when this structure is repaired, it is cumbersome to disassemble the punch, the cost of replacing the blade is also relatively high, and the blanking effect after repair is not ideal.

[0004] Disadvantages / shortcomings of existing technologies:

[0005] 1. The shape of the punch is slender, and the verticality and shape integrity during processing cannot be well controlled. It is also prone to bending, deformation or breakage during production;

[0006] 2. There are many upper and lower die inserts, large amount of wire cutting processing, high cost and large cumulative error;

[0007] 3. When the punch is damaged, disassembly and repair are cumbersome, the cost of replacing the punch is high, the repair time is long and the efficiency is low.

[0008] 4. The burrs caused during production will gradually become larger as the punch is used more times, and cannot be completely improved by repairing the punch. The more repairs are done, the shorter the service life will be.

[0009] Therefore, we proposed a new die punch structure to improve the burr. Utility Model Content

[0010] The purpose of this utility model is to solve the problem of burrs caused by punching of heat dissipation holes of aluminum shell of laptops in order to achieve better appearance and functionality, and to consider developing a mold structure for a mold punch to improve the burrs. This is to change the previous method of removing this defect by other process methods such as manual filing or polishing. The size and number of burrs directly affect the production yield, appearance and performance. The precision and strength of the punch and the quality of the mold structure have a great direct relationship with the burrs. In terms of maintenance, it is also necessary to consider how to reduce the number of maintenance, time, processing costs, labor costs, etc. Therefore, it is necessary to consider a mold structure for a mold punch to improve the burrs, and to improve the precision and strength and optimize the mold structure when making the mold punch at the beginning to solve this problem.

[0011] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a structure for improving burrs of a mold punch, comprising a punching machine, the top of the punching machine is connected to a main machine, the output end of the punching machine is connected to an upper clamping plate, the surface of the punching machine is connected to a lower mold, the four corners of the bottom of the upper clamping plate are connected to fixed blocks, the top of the fixed block is connected to a first precision-grade dowel pin, the bottom of the fixed block is connected to a second precision-grade dowel pin, and a punch is inserted into the interior of the second precision-grade dowel pin.

[0012] Preferably, the upper clamping plate is provided with slots at the four inner corners near the fixed block, and a spring is provided inside each group of the slots. The springs are used instead of the T-shaped auxiliary guide columns used in the traditional mold to guide and close the upper and lower molds, thereby improving the deviation of the gap between the punch and the blade and the convenience of disassembling the stripper plate.

[0013] Preferably, the bottom of each group of springs is connected to a push block, and the bottom of the push block is connected to a top block, and the push block can cooperate with the spring to realize material removal.

[0014] Preferably, the bottoms of the four groups of top blocks are connected with stripping plates, which have a rectangular shape. The stripping plates are changed to a non-insert type, which can effectively reduce the stacking error caused by processing inserts.

[0015] Preferably, an elastic structure is formed between the push block and the spring, the outer surface of the push block fits against the inner wall of the slot, the spring provides a pressing force to press the material against the lower die edge, the double-headed guide column guides the lower die part to guide and close the die, and a stamping is completed after the punch crankshaft rotates one circle, thus effectively improving the stamping parts with reduced burrs or even no burrs.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] 1. In the utility model, the method of clamping the punch with a fixed block with a high-precision dowel pin can facilitate the correction of wire cutting deviation problems during processing, greatly reduce the length of the punch, and is easy to install and maintain. The reduction in the length of the punch can effectively reduce bending deformation during processing and use, thereby improving the verticality and accuracy of the punch, reducing processing costs, and improving the punching burr effect. The double-headed auxiliary guide column can improve the accuracy of the upper and lower molds, and at the same time make the disassembly method of the stripper plate simple, thereby effectively reducing the time and cost of mold maintenance. The stripper plate is changed to a non-insert method, which can effectively reduce the superposition error caused by the processing insert; the lower template is changed to a double-layer insert method, which can effectively reduce the repair cost of blade damage and improve the accuracy of punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of a die punch structure for improving burrs proposed in the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure from another angle of the structure of the die punch for improving burrs proposed by the utility model;

[0020] Figure 3 This is a partial cross-sectional structural diagram of a die punch structure for improving burrs proposed in the utility model;

[0021] Figure 4 The utility model provides a schematic diagram of the partial explosion structure of a die punch structure for improving burrs.

[0022] Legend: 1. Punch; 2. Upper clamp; 3. Lower die; 4. Main machine; 5. Notch; 6. Spring; 7. Push block; 8. Ejector block; 9. Stripper plate; 10. Fixed block; 11. First-grade dowel pin; 12. Second-grade dowel pin; 13. Punch. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] See also Figure 1-4The utility model provides a technical solution: a structure for improving burrs of a mold punch, comprising a punching machine 1, the top of the punching machine 1 is connected to a main machine 4, the output end of the punching machine 1 is connected to an upper splint 2, the surface of the punching machine 1 is connected to a lower mold 3, the four corners of the bottom of the upper splint 2 are connected to fixed blocks 10, the top of the fixed block 10 is connected to a first precision-level dowel pin 11, the bottom of the fixed block 10 is connected to a second precision-level dowel pin 12, and a punch 13 is inserted into the interior of the second precision-level dowel pin 12.

[0026] like Figure 2-3 As shown, slots 5 are provided at the four inner corners of the upper clamping plate 2 near the fixed block 10, and springs 6 are provided inside each set of slots 5. The springs 6 replace the T-shaped auxiliary guide columns used in the traditional mold to guide and close the upper and lower molds, thereby improving the deviation of the gap between the punch 13 and the blade and the convenience of disassembling the stripper plate 9.

[0027] like Figure 3 As shown, the bottom of each group of springs 6 is connected to a push block 7, and the bottom of the push block 7 is connected to a top block 8. The push block 7 can cooperate with the spring 6 to realize material removal.

[0028] As shown in Figure 4, the bottom of the four groups of top blocks 8 are connected with a stripper plate 9. The shape of the stripper plate 9 is rectangular. The stripper plate 9 is changed to a non-insert type, which can effectively reduce the stacking error caused by processing the insert.

[0029] like Figure 3 and Figure 4 As shown, an elastic structure is formed between the push block 7 and the spring 6. The outer surface of the push block 7 fits against the inner wall of the slot 5. The spring 6 provides a pressing force to press the material against the lower die edge. The lower die is guided by a double-headed guide column to guide and close the die. A stamping is completed after the crankshaft of the punch press rotates one circle. In this way, the stamped parts with reduced burrs or even no burrs are effectively improved.

[0030] The method of use and working principle of this device: First, make an improved high-precision punch 13-level fixed block 10, fix the punch 13 in the fixed block 10 of the second-precision level pin 12, and then use the first-precision level pin 11 to place the fixed block 10 on the upper clamping plate 2, and then the spring 6's own elastic force pushes the push block 7, so that the push block 7 can push the stripper plate 9 through the top block 8 to provide the pressing and stripping force. The lower mold 3 is made of an improved two-layer structure of the blade insert, the bottom layer is processed and enlarged to facilitate blanking, and the upper layer is a high-precision blade insert with reduced thickness. The upper and lower molds 3 are both improved and optimized structures, and then the mold is assembled to check whether there are any processing problems with the punch 13 and the blade. Finally, the C-type pneumatic punch is used to drive the upper die part downward, and the spring 6 provides the pressing force to press the material to the cutting edge of the lower die 3. The double-headed guide column guides the lower die part to guide and close the die. After the punch crankshaft rotates one circle, a stamping is completed. In this way, the stamped parts with reduced burrs or even no burrs are effectively improved.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A structure for improving burrs on a die punch, comprising a punching machine (1), characterized in that: The top of the punching machine (1) is connected to a main machine (4), the output end of the punching machine (1) is connected to an upper clamping plate (2), the surface of the punching machine (1) is connected to a lower mold (3), the four corners of the bottom of the upper clamping plate (2) are connected to fixed blocks (10), the top of the fixed block (10) is connected to a first precision-grade dowel pin (11), the bottom of the fixed block (10) is connected to a second precision-grade dowel pin (12), and a punch (13) is inserted into the interior of the second precision-grade dowel pin (12).

2. The structure for improving burrs of a die punch according to claim 1, characterized in that: The upper clamping plate (2) is provided with slots (5) at four inner corners close to the fixed block (10), and a spring (6) is provided inside each group of the slots (5).

3. The structure for improving burrs of a die punch according to claim 2, characterized in that: The bottom of each group of springs (6) is connected to a push block (7), and the bottom of the push block (7) is connected to a top block (8).

4. The structure for improving burrs on a die punch according to claim 3, characterized in that: The bottoms of the four groups of top blocks (8) are connected with stripping plates (9), and the stripping plates (9) are rectangular in shape.

5. The structure for improving burrs on a die punch according to claim 4, characterized in that: An elastic structure is formed between the push block (7) and the spring (6), and the outer surface of the push block (7) is in contact with the inner wall of the notch (5).

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