Punching die for side faces of double ends of round pipe

Abstract

The utility model belongs to the technical field of dies, and particularly discloses a round pipe double-end side face punching die. Comprising an upper die base, a lower die base, an air cylinder, a punch assembly, a limiting column, an outer guide column, a fixing plate and a lower die plate. The outer guide column is arranged between the upper die base and the lower die base, the punch assembly is installed between the upper die base and the lower die base, and the punch assembly is used for punching a round pipe to be machined. The limiting columns are further arranged below the upper die base, the fixing plate is fixed in the lower die plate, the lower die plate is arranged on the lower die base, and the air cylinder is installed at the head end of the lower die base. In the practical application, the round pipe punching device can punch the two ends and the side face of a round pipe at the same time, the round pipe is automatically machined through the air cylinder and the punch assembly, the process difficulty and production cost are reduced, machining procedures are reduced, and the product percent of pass and production efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of moulds, and particularly discloses a circular tube double-head side punching mould. Background Art

[0002] When punching a circular tube (as shown in the appendix Figure 1 ), special equipment is usually used to simplify the process flow and reduce the number of processes. However, due to the limited demand for this part, the high equipment investment significantly increases the cost per part, weakening the market competitiveness of the product. On the other hand, although using the existing punching press technology can reduce costs, it faces the double challenges of complexity and precision. The multiple holes and specific notches at both ends of the circular tube require high-precision positioning. Each separate stamping process is not only cumbersome, but the accumulated positioning errors will lead to a decrease in the dimensional consistency of the parts, directly affecting the qualified rate of the finished products, thus restricting the production efficiency and quality control and unable to fully meet the high-standard production requirements.

[0003] The circular tube double-head punching and flanging mould with the patent application number of CN201510585913.9 includes a base, a blank holder, a guiding mechanism, a convex and concave die mechanism arranged on the base, and a punching convex die mechanism and a pressing plate arranged on the convex and concave die mechanism; the guiding mechanism includes a push plate and a guiding rod sleeved between the push plates; the convex and concave die mechanisms are respectively arranged at both ends of the base, and each convex and concave die mechanism is connected with the push plate; each convex and concave die mechanism includes a convex and concave die fixing seat, a convex and concave die, a first template, and a convex and concave die moving limit structure; a punching convex die mechanism is connected to each convex and concave die mechanism, and the punching convex die mechanism includes a second template movably connected with the convex and concave die fixing seat and a punching convex die arranged on the second template. Each punching convex die mechanism of the above device needs to be independently positioned with the workpiece, which means that new positioning errors may be introduced every time the punching position is changed. Therefore, it is urgent for those skilled in the art to solve the above technical problems. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that in the above-mentioned prior art, when punching the double heads of the circular tube on the side, the cost of special equipment is high, and the positioning effect of the existing mould is poor.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A circular tube double - head side punching die, comprising an upper die base, a lower die base, a cylinder, a punch assembly, a limit post, an outer guide post, a fixing plate and a lower template; an outer guide post is arranged between the upper die base and the lower die base, the upper die base is slidably mounted on the outer guide post, a punch assembly is installed between the upper die base and the lower die base, and the punch assembly is used for punching the circular tube to be processed; a limit post is further arranged below the upper die base, the fixing plate is fixed inside the lower template, the lower template is placed on the lower die base, and the cylinder is installed at the front end of the lower die base; the punch assembly includes a punching blade, a punching punch, a punch pressure plate and an inserting punch, the punching blade is embedded in a guide seat, a punching punch is further arranged inside the guide seat, the inserting punch is fixed inside the upper die base, and a punching punch and a punch pressure plate are further arranged inside the guide seat.

[0007] The punching blade is embedded in the guide seat, ensuring the accuracy of the punching position. The punching punch inside the guide seat is precisely guided during the punching process, thus achieving a high - precision punching effect. The spring arranged between the punching punch and the guide seat can reset the punching punch, ensuring that the punch can quickly return to its original position after each punching, while buffering the punching force, reducing the wear of the die components, and prolonging the die life. The punch pressure plate restricts the freedom of movement of the punching punch, ensuring that the punching punch can only slide in a predetermined direction, avoiding deviation during the punching process, and further improving the accuracy and reliability of punching. The inserting punch is fixed inside the upper die base and can directly or indirectly drive the punching punch into the punching blade to achieve simultaneous punching of multiple holes, reducing the number of punching processes, improving production efficiency. The punching blade and the fixing plate are provided with waste channels to ensure that the waste generated by punching can be smoothly discharged, avoiding waste accumulation from affecting subsequent punching operations, and maintaining the cleanliness and efficient operation of the die. Integrating multiple punching processes into one reduces the processing procedures, lowers the time and cost of die replacement and debugging, while increasing the product qualification rate, reducing the rejection rate, and generally reducing the production cost.

[0008] Furthermore, a stripping block and a waste channel are also arranged on the fixing plate, and the stripping block and the waste channel are fixed to the fixing plate by screws.

[0009] The blanking block plays a role in supporting the steel pipe part during the stamping process of the punching punch, preventing the part from deforming or moving under the action of the punching force, ensuring the accuracy of punching and the integrity of the part. The use of the blanking block ensures the stability during the punching process and the quality of the part, avoids dimensional deviations caused by part deformation, improves the product qualification rate. The waste channel is used to collect and discharge the waste generated after punching, avoiding the accumulation of waste inside the mold, reducing the cleaning work, and improving the production efficiency. By designing a dedicated waste channel, it can ensure the smooth discharge of waste without interfering with subsequent punching operations, maintaining the continuous operation ability of the mold. Using screws to fix the blanking block and the waste channel on the fixed plate provides convenience for installation and disassembly, facilitating the maintenance of the mold and the replacement of components. The screw fixation allows users to adjust the positions of the blanking block and the waste channel according to different production requirements, enhancing the flexibility and application range of the mold. This fixation method also ensures the stability of the blanking block and the waste channel during the stamping process, avoiding production failures caused by loosening or falling off.

[0010] Further, a lower template is also installed on the lower die base, and a slider seat, a positioning block, and a stop block are also provided on the lower template; a slider and a slider pressure plate are provided on the slider seat, the slider is slidably installed on the slider seat, the insert punch drives the slider and the punching punch, and a spring is provided between the slider and the slider seat.

[0011] The positioning block ensures the precise positioning of the steel pipe part before punching, which is crucial for ensuring the correct position of the hole, improving the dimensional accuracy of the product. The presence of the stop block helps to balance the lateral force during the stamping process, preventing the part from shifting or deforming, ensuring the stability of the punching process and the geometric shape of the part. The slider moves under the action of the insert punch, and then drives the punching punch, realizing the effective transmission of power. This design reduces the impact force directly acting on the punching punch, extending the service life of the punching punch. The spring is arranged between the slider and the slider seat, which can not only absorb the impact force during the stamping process, reduce the wear of the mold components, but also ensure that the slider quickly returns to its original position after stamping, preparing for the next stamping, improving the production efficiency. The slider pressure plate limits the degree of freedom of the slider, enabling the slider to slide only within the slider seat, which ensures the precise guidance during the punching process, avoids unnecessary movements, enhances the accuracy and consistency of punching. The combined design of the slider seat and the slider enables the mold to adapt to punching requirements of different sizes and positions, improving the flexibility and adaptability of the mold, and being applicable to various specifications of round tube parts. The overall design simplifies the operation process, reduces the time required for part replacement and adjustment, and improves the production efficiency and the flexibility of the production line.

[0012] Further, the positioning block is used for the positioning of the round tube to be processed; the lower template is also connected with a T-shaped block, and the T-shaped block pushes and pulls the lower template under the drive of the cylinder.

[0013] The positioning block is used to ensure the accurate position of the round tube to be processed in the mold, which is a prerequisite for achieving precise punching. Through the profiling surface on the positioning block, the round tube parts can be positioned quickly and accurately, ensuring that each punching is carried out at the expected position, thereby improving the dimensional accuracy and consistency of the product. The linkage mechanism between the T-shaped block and the cylinder enables the lower template to be precisely pushed and pulled during the punching process, realizing the automatic control of the mold opening and closing. This not only speeds up the production rhythm and reduces manual operation, but also ensures the stability and positioning accuracy of the parts during each punching, avoiding errors and inconsistencies that may be caused by manual operation. The configuration of the T-shaped block and the cylinder enables the mold to adapt to round tube parts of different lengths. By adjusting the cylinder stroke and the position of the T-shaped block, different-sized parts can be easily matched, improving the flexibility and adaptability of the mold, and reducing the time and cost of replacing the mold. The automatic pushing and pulling process reduces the manual intervention of the operator, reduces the operation risk, and also reduces the impact of human factors on production efficiency and quality, improving the safety and reliability of the entire punching process.

[0014] Furthermore, a guiding block and a cylinder connecting block are also provided on the lower die base. The guiding block restricts the degrees of freedom of the lower template, enabling the lower template to slide axially on the round tube to be processed. The cylinder is fixed on the cylinder connecting block, and the cylinder is also connected to the T-shaped block through a screw.

[0015] The function of the guiding block is to restrict the degrees of freedom of the lower template, ensuring that the lower template can only slide in the axial direction of the round tube. In this way, the position of the steel pipe part relative to the punching edge can be precisely controlled, improving the accuracy and consistency of punching. The cylinder is connected to the T-shaped block through a screw, which can precisely control the moving distance and speed of the lower template, realizing automatic operation, reducing manual intervention, and improving production efficiency. At the same time, the use of the cylinder also provides the mold with flexible adjustment capabilities, and the punching position can be adjusted according to different round tube lengths. Through the cooperation of the guiding block and the cylinder, the smooth movement of the lower template during the punching process can be ensured, avoiding punching deviations caused by shaking or deviation from the axis, enhancing the stability and reliability of the punching process. Driven by the cylinder, the T-shaped block drives the lower template to move precisely, reducing the need for multiple positionings, thereby reducing the accumulated positioning errors, and improving the dimensional accuracy and consistency of the product. The automatic control of the lower template movement reduces the operation time, speeds up the punching cycle speed, and improves production efficiency. Especially in the production environment of small batches and multiple specifications, it can quickly adapt to round tube parts of different sizes and reduce the production preparation time.

[0016] Furthermore, the lower template includes a movable lower template and a fixed lower template. The movable lower template is installed in the groove of the lower die base, and the fixed lower template is fixed on the lower die base through screws and dowel pins.

[0017] The movable lower template can slide axially along the steel pipe under the action of the cylinder, enabling the mold to adapt to steel pipe parts of different lengths, improving the versatility and production flexibility of the mold. The fixed lower template is fixed on the lower die base through screws and dowel pins, providing a stable positioning reference, ensuring the stability and positioning accuracy of the parts during the punching process, and avoiding punching deviations caused by mold vibration or part movement. The design of the movable lower template makes the mold adjustment more convenient. There is no need to frequently replace the entire mold. Only by adjusting the position of the movable lower template can it adapt to parts of different sizes, saving the time and labor costs required for mold replacement. The stability of the fixed lower template helps to reduce the wear and deformation of the mold during long-term use, extending the service life of the mold. Combining the quick positioning of the movable lower template and the stability of the fixed lower template, the mold can quickly complete the continuous production of different parts while ensuring the punching accuracy, improving the production efficiency. By reducing the downtime required for mold replacement and adjustment, and reducing the scrap rate caused by inaccurate part positioning, this design helps to reduce production costs and improve the overall economic benefits.

[0018] The utility model has the following beneficial effects:

[0019] 1. By designing the punching of multiple holes at both ends in one go, the utility model significantly reduces the number of processes, thus greatly improving the production efficiency. The work that originally required multiple stampings can now be achieved with only one clamping, saving a great deal of production time.

[0020] 2. In the mold structure, the design of the movable lower template, through the cooperation of the cylinder and the T-shaped block, enables the mold to adapt to round pipe parts of different lengths, increasing the flexibility of the mold and its adaptability to parts of different specifications. This allows the mold to quickly switch when facing multi-specification and small-batch production, improving the production efficiency.

[0021] 3. The setting of the limit posts prevents the upper die base from being pressed down excessively, avoiding damage to the mold caused by excessive pressure, and at the same time ensuring the safety of the operators. The automation level of the mold is improved, reducing the need for manual operation and lowering the operation risk. Description of the Drawings

[0022] Figure 1 It is a drawing of a steel pipe part;

[0023] Figure 2 It is a general assembly drawing of a mold structure for side punching of multiple holes at both ends of a round pipe;

[0024] Figure 3 It is a partial cross-sectional view of a mold structure for side punching of multiple holes at both ends of a round pipe;

[0025] Figure 4The stamping process 1 of a die structure for punching multiple holes on the sides of both ends of a round tube;

[0026] Figure 5 The stamping process 2 of a die structure for punching multiple holes on the sides of both ends of a round tube;

[0027] Figure 6 Perspective view of the working part of a die structure for punching multiple holes on the sides of both ends of a round tube.

[0028] Among them, 1 - upper die base, 2 - outer guide pillar, 3 - cylinder, 4 - cylinder connection block, 5 - lower die base, 6 - limit pillar, 7 - positioning block, 8 - steel pipe part, 9 - punch press plate, 10 - slider press plate, 11 - slider seat, 12 - slider, 13 - insert punch, 14 - support block, 15 - guide seat, 16 - lower template, 17 - fixing plate, 18 - T-shaped block, 19 - outer guide pillar, 20 - screw, 21 - punching blade, 22 / 24 - spring, 23 - waste channel, 25 - stripping block, 26 - first punching punch; 27 - second punching punch. Specific implementation manner

[0029] The following further describes the present utility model in detail in conjunction with the attached drawings and specific preferred implementation manners.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present utility model. The specific dimensions adopted in this embodiment are only for illustrating the technical solution and do not limit the protection scope of the present utility model.

[0031] Referring to Figure 2 , Figure 3 and Figure 6 , it can be known that a die for punching holes on the sides of both ends of a round tube includes an upper die base 1, an insert punch 13, a limit pillar 6, a fixing plate 17, a lower template 26, and a lower die base 5 that are connected in sequence from top to bottom. An outer guide pillar 2 is arranged between the upper die base 1 and the lower die base 5. The upper die base 1 slides up and down along the outer guide pillar 2. An insert punch 13 is connected below the upper die base 1. The insert punch 13 is fixed in the upper die base 1 and directly and indirectly drives the first punching punch 26 or the second punching punch 27 to punch into the punching blade 21, thereby realizing the punching of the round tube part;

[0032] In one embodiment, a limit pillar 6 is further arranged below the upper die base 1. The limit pillar 6 can limit the downward position of the upper die base and prevent safety accidents caused by overpressure;

[0033] The punching blade 21 is embedded in the guiding seat 15. Inside the guiding seat 15, there are also a punching punch 26, a stripping block 25, and a punch pressing plate 9. The punch pressing plate 9 restricts the freedom of movement of the first punching punch 26, enabling the first punching punch 26 to slide only in the guiding seat 15 in the punching direction. A spring 14 is also provided between the first punching punch 26 and the guiding seat. The spring 14 can reset the first punching punch 26 and buffer the punching force.

[0034] The punching blade 21, the stripping block 25, and the guiding seat 15 are fixed together on the fixing plate 17. The stripping block 25 protects the steel pipe part from deformation during the punching process of the punching punch. The punching blade 21 and the fixing plate are also provided with a waste channel 23 for discharging the waste after punching.

[0035] The fixing plate 17 is fixed inside the lower template 16. The lower template 16 is placed on the lower die base 5. The lower template 26 is also provided with a slider seat 22, a positioning block 7, and a supporting block 14. The slider seat 11 is provided with a slider 12 and a slider pressing plate 10. The slider pressing plate 10 restricts the freedom of movement of the slider 12, enabling the slider 12 to slide only inside the slider seat 11. The slider 12 drives the punching punch 26 under the action of the inserting punch 13. A spring 22 is also provided between the slider 12 and the slider seat 11. The spring 22 can reset the slider 12.

[0036] The positioning block 7 is mainly used for the initial positioning of the steel pipe part.

[0037] The supporting block on the lower template 16 mainly balances the lateral force of the inserting punch 13 during the punching process. Among them, the movable group lower template 16 is connected with a T-shaped block 18. The T-shaped block 18 can push and pull the lower template 16 under the action of the cylinder 3.

[0038] The lower die base 5 is also provided with a guiding seat 15 and a cylinder connecting block. The guiding seat 15 restricts the freedom of movement of the movable group lower template 5, enabling it to slide in the direction of the steel pipe circular axis. The cylinder 3 is fixed on the cylinder connecting block 4. At the same time, the cylinder 3 is also connected to the T-shaped block 16 through a screw. The cylinder 3 provides power for the T-shaped block 18.

[0039] Referring to Figure 4 、 Figure 5 , it can be seen that the inserting punch 13 and the limit post 6 are fixed to the upper die base 1 by screws. The limit post 6 plays a limiting role when the die is closed. Together, they form the upper die part.

[0040] The punching blade 21, the stripping block 25 and the guide seat 15 are fixed on the fixing plate 17 together by screws. The punching punch 26 / 27 and the punch pressing plate 9 are also arranged in the guide seat 15. The punch pressing plate 9 is fixed to the guide seat 15 by screws. A spring 22 is also arranged between the punching punch 26 / 27 and the guide seat 15. The spring 22 can reset the punching punch 26 / 27 and buffer the punching force. A waste channel 23 is also arranged between the punching blade 21 and the fixing plate 17. The waste channel 23 is used for discharging the waste after punching. The fixing plate 17 is fixed in the lower template 16 by screws. The lower template 16 is placed on the lower die base 5. The lower template 16 is also provided with a slider seat 11, a positioning block 7 and a stop block 14; a slider 12 and a slider pressing plate 10 are arranged on the slider seat 11. The slider pressing plate 10 and the slider seat 11 are fixed on the lower template 16 by screws. A spring 24 is also arranged between the slider 12 and the slider seat 11. The spring 24 can reset the slider 12 and buffer the impact force of the inserting punch 13; the positioning block 7 is fixed to the lower template 16 by screws, and it is mainly used for the initial positioning of the steel pipe part 8; the stop block 14 on the lower template 16 mainly balances the lateral force of the inserting punch 13 during the stamping process; a T-shaped block 18 is also connected to the lower template 16. The T-shaped block 18 can push and pull the lower template 16 under the action of the cylinder 3; a guide block 20 and a cylinder connecting block 4 are also arranged on the lower die base 5. The guide block 20 is fixed to the lower die base 5 by screws. A cylinder 3 is fixed on the cylinder connecting block 4. At the same time, the cylinder 3 is also connected to the T-shaped block 18 by a screw rod 19. The cylinder 3 provides power for the T-shaped block 18 through the screw rod 19, so as to push and pull the lower template 16; it is the lower die part. The die is guided by the outer guide post 2 during the up and down movement process.

[0041] Place the steel pipe part 8 in the positioning block 7, and determine the position of the steel pipe part 8 through the profiling surface on the positioning block 7, as Figure 4 .

[0042] Then, under the action of the punch press, the upper die base 1 of the die moves vertically downward from the top dead center of the punch press through the outer guide post 2. At the same time, the cylinder 3 is pushed out so that the steel pipe part 8 enters the punching position of the punching blade 21 before the upper die part contacts the lower die part (as Figure 5 ); when the inserting punch 13 contacts the punching punch 26 and the slider 12, the upper die part continues to move downward. The inserting punch 13 drives the punching punch 26 and the slider 12, and the slider 12 drives the punching punch 27 to punch the steel pipe part 8, and at the same time compresses the springs 22 / 24, as Figure 2 , Figure 3 and Figure 6 .

[0043] The upper die part moves downward to the bottom dead center of the punch press. At this time, the limit post 6 also contacts the lower die base 5, restricting the downward movement of the upper die part and preventing accidents caused by overpressure. The punching punches 26 / 27 have also entered the punching blade 21, and the punching punches 26 / 27 punch through the steel pipe part 8, and the waste enters the waste channel 23.

[0044] Then the punching machine moves upward, and the upper die base 1 and the inserting punch 13 move upward. The springs 22 / 24 reset the punching punches 26 / 27 and the slider 12 respectively until the inserting punch 13 does not contact the punching punches 26 and the slider 12, and the reset of the punching punches 26 / 27 and the slider 12 is completed. The upper die part continues to move upward. After the inserting punch 13 does not contact the punching punches 26 and the slider 12, the air cylinder 3 pulls down the lower template 16 to separate the steel pipe part 8 from the punching edge 21. The punching machine reaches the top dead center, and the steel pipe part 8 is taken out to complete one cycle.

[0045] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A double-headed side punching die for round tubes, characterized in that: It includes an upper die base, a lower die base, a cylinder, a punch assembly, a limit post, an outer guide post, a fixing plate and a lower template; the outer guide post is arranged between the upper die base and the lower die base, the upper die base is slidably mounted on the outer guide post, the punch assembly is installed between the upper die base and the lower die base, and the punch assembly is used for punching the round tube to be processed; the limit post is also provided below the upper die base, the fixing plate is fixed in the lower template, the lower template is placed on the lower die base, and the cylinder is installed at the front end of the lower die base; the punch assembly includes a punching blade, a punching punch, a punch pressure plate and an inserting punch, the punching blade is embedded in the guide seat, the punching punch is also arranged in the guide seat, the inserting punch is fixed in the upper die base, and the punching punch and the punch pressure plate are also arranged in the guide seat.

2. The round tube double-head side punching die according to claim 1, wherein: A stripping block and a waste channel are also arranged on the fixing plate, and the stripping block and the waste channel are fixed on the fixing plate by screws.

3. The circular tube double-head side punching die according to claim 1, characterized in that: A lower template is also installed on the lower die base, and a slider seat, a positioning block and a backing block are also provided on the lower template; a slider and a slider pressure plate are provided on the slider seat, the slider is slidably mounted on the slider seat, the inserting punch drives the slider and the punching punch, and a spring is arranged between the slider and the slider seat.

4. The circular tube double-head side punching die according to claim 3, characterized in that: The positioning block is used for positioning the round tube to be processed; the lower template is also connected with a T-shaped block, and the T-shaped block pushes and pulls the lower template under the drive of the cylinder.

5. The circular tube double-head side punching die according to claim 4, wherein: A guide block and a cylinder connecting block are also provided on the lower die base, the guide block restricts the degree of freedom of the lower template, so that the lower template slides axially on the round tube to be processed, the cylinder is fixed on the cylinder connecting block, and the cylinder is also connected with the T-shaped block through a screw rod.

6. The double-headed side punching die for round tubes according to claim 1, characterized in that: The lower template includes a movable lower template and a fixed lower template, the movable lower template is installed in the groove of the lower die base, and the fixed lower template is fixed on the lower die base by screws and dowel pins.

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