A punching device for square tube sections

Abstract

The application belongs to the field of punching equipment, and particularly relates to a punching device for square tube profiles, which comprises a lower die assembly, an upper die assembly, a punching power mechanism and a rack. The lower die assembly comprises a lower die base, and at least one lower die body which is detachably connected to the lower die base. A part of the lower die body protrudes from the front side of the lower die base, and the part of the lower die body protruding from the lower die base is used for inserting a matched square tube profile and has a lower die hole. By designing the lower die body as a structure which can be inserted into the inside of the square tube profile and precisely matching with a punch module in the upper die assembly, effective support is provided from the inside of the tube cavity by the lower die body during the punching process, so that the collapse, deformation or hole shape distortion of the thin-walled square tube under the action of the punching force is effectively prevented. Meanwhile, the punch module and the lower die body are detachably connected, so that the mold can be quickly replaced according to different hole types, and the universality and production flexibility of the equipment are improved.

Description

Technical Field

[0001] This application belongs to the field of punching equipment, specifically relating to a punching device for square tube profiles. Background Technology

[0002] In the production processes of machinery manufacturing, automobile manufacturing, rail transportation, building steel structures, and various industrial equipment, square tubular profiles are widely used in vehicle frames, support structures, and frame systems due to their advantages such as high structural strength, light weight, and ease of assembly. To meet assembly, connection, or functional requirements, square tubular profiles typically require through holes machined into their walls, including circular holes, oblong holes, or other irregularly shaped holes. These through holes are used for bolt connections, wire harness routing, fluid channels (including electrophoretic coating), or positioning references.

[0003] Currently, traditional drilling is commonly used for machining through holes in square tube profiles. This process uses a drilling machine or CNC drilling equipment to drill holes one by one into the wall of the square tube using a high-speed rotating drill bit. However, because square tubes are typical thin-walled hollow structures, with a wall thickness of only 1-3 mm, they are prone to vibration, deformation, and even edge collapse during drilling. This not only affects the accuracy of the hole positions and surface quality but also places high demands on fixture positioning and process stability. Furthermore, drilling is a point-to-point, hole-by-hole machining method, which has low processing efficiency, rapid tool wear, and high energy consumption, making it difficult to meet the needs of large-scale, high-cycle industrial production, resulting in high overall manufacturing costs.

[0004] To improve processing efficiency, some companies have tried thermal processing methods such as laser cutting or plasma cutting. However, these methods suffer from problems such as large heat-affected zones, easy oxidation of hole edges, and complex post-processing, and also have high equipment investment costs, making them unsuitable for ordinary small and medium-sized enterprises. In contrast, punching technology has advantages such as fast forming speed, good consistency, low cost, and no heat-affected zone, making it an ideal choice for efficient hole making of thin plates and thin-walled profiles. However, existing punching equipment is mostly designed for flat plates or simple cross-section profiles, making it difficult to adapt to the closed cavity structure of square tubes. When punching square tubes, improper control of the punching force or unreasonable support structure can easily cause tube wall collapse, hole shape distortion, or even overall structural instability. Summary of the Invention

[0005] The technical problem to be solved by this application is to provide a punching device for square tube profiles, which can quickly punch various hole types such as round holes and oblong holes while ensuring the integrity of the tube structure and the accuracy of the hole position, thereby replacing the traditional drilling process, significantly improving production efficiency and reducing manufacturing costs.

[0006] This application provides a punching device for square tube profiles, comprising: The lower mold assembly includes a lower mold base and at least one lower mold body detachably connected to the lower mold base. A portion of the lower mold body protrudes from the front side of the lower mold base, and the portion of the lower mold body protruding from the lower mold base is used to insert a matching square tube profile and has a lower mold hole. The upper mold assembly includes a mounting base and at least one punch module detachably connected to the bottom of the mounting base; The punching power mechanism is used to reciprocate linearly drive the upper die assembly so that the punch module can cooperate with the lower die hole to form a through hole in the square tube profile. A frame for mounting the lower die assembly and the punching power mechanism.

[0007] Optionally, the lower mold assembly further includes at least one lower mold fixing plate. The lower mold base has at least one mounting hole, and the lower mold body is disposed in the mounting hole. The lower mold fixing plate is detachably fixed to the rear side of the lower mold base and aligned with the mounting hole. The lower mold fixing plate is used to pass through a fastening bolt, and the fastening bolt is used to screw the lower mold body.

[0008] Optionally, the lower mold base has a plurality of threaded holes extending to the mounting hole, and bolts are threaded into the threaded holes to reinforce and fix the lower mold body.

[0009] Optionally, the lower die assembly further includes an upper die pusher plate detachably disposed on the front side of the lower die base. The upper die pusher plate is located above the lower die body, and the upper die pusher plate has a guide hole for the punch module to pass through.

[0010] Optionally, the lower mold assembly further includes a support tripod to improve the stability of the lower mold body.

[0011] Optionally, the portion of the lower mold body protruding from the lower mold base has a guide slope for guiding the square tube profile.

[0012] Optionally, the bottom of the mounting base has at least one mounting groove, and the punch module includes a punch fixing block detachably disposed in the mounting groove and a punch body disposed in the punch fixing block.

[0013] Optionally, the upper mold assembly further includes at least two guide posts and guide sleeves that match the at least two guide posts. The guide sleeves are disposed through the mounting base, and one end of each guide post is fixed to the frame, while the other end passes through the guide sleeve.

[0014] Optionally, the punching power mechanism includes a linear driver and a connector for connecting the linear driver to the mounting base.

[0015] Optionally, the linear actuator is a hydraulic cylinder, an electric cylinder, or a pneumatic cylinder.

[0016] The beneficial effects of this application are that by designing the lower die body as a structure that can be inserted into the square tube profile and precisely aligning it with the punch module in the upper die assembly, the lower die body provides effective support from inside the tube cavity during the punching process, effectively preventing the thin-walled square tube from collapsing, deforming, or distorting the hole shape under the punching force. Simultaneously, the punch module and the lower die body are detachably connected, facilitating quick die replacement for different hole shapes (such as round holes, oblong holes, etc.), improving equipment versatility and production flexibility. The entire device uses punching technology to replace traditional drilling, significantly improving processing efficiency, reducing tool wear and energy consumption, and avoiding the heat-affected zone and oxidation problems caused by hot working. While ensuring hole position accuracy and tube structure integrity, it achieves efficient, low-cost, and high-quality batch punching processing of square tube profiles. Attached Figure Description

[0017] Figure 1 A front view structural schematic diagram of the punching device for square tube profiles provided in the embodiments of this application; Figure 2 A rear view structural schematic diagram of the punching device for square tube profiles provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the lower mold assembly provided in an embodiment of this application; Figure 4 This is an exploded view of the lower mold assembly provided in an embodiment of this application; Figure 5 This is a top view of the lower mold assembly provided in an embodiment of this application; Figure 6 for Figure 5 AA cross-section view; Figure 7 This is a schematic diagram of the punch module provided in an embodiment of this application.

[0018] In the diagram: 100, lower die assembly; 110, lower die base; 111, mounting hole; 112, screw hole; 120, lower die body; 121, lower die hole; 122, guide slope; 130, lower die fixing plate; 140, upper die push plate; 141, guide hole; 150, support triangle; 200, upper die assembly; 210, mounting base; 220, punch module; 221, punch fixing block; 222, punch body; 230, guide post; 240, guide sleeve; 300, punching power mechanism; 310, linear actuator; 320, connector; 400, frame. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] like Figure 1-7 As shown, this application provides a punching device for square tube profiles, comprising: a lower die assembly 100, an upper die assembly 200, a punching power mechanism 300, and a frame 400; wherein, the lower die assembly 100 includes a lower die base 110 and at least one lower die body 120 detachably connected to the lower die base 110, a portion of the lower die body 120 protruding from the front side of the lower die base 110, and the portion of the lower die body 120 protruding from the lower die base 110 is used to insert a matching square tube profile and has a lower die hole 121; the upper die assembly 200 includes a mounting base 210 and at least one punch module 220 detachably connected to the bottom of the mounting base 210; the punching power mechanism 300 is used to reciprocate linearly drive the upper die assembly 200, so that the punch module 220 cooperates with the lower die hole 121 to form a through hole in the square tube profile; the frame 400 is used to mount the lower die assembly 100 and the punching power mechanism 300.

[0021] Compared with existing technologies, the punching device provided in this application, by designing the lower die body 120 as a structure that can be inserted into the square tube profile and precisely aligning it with the punch module 220 in the upper die assembly 200, provides effective support from inside the tube cavity during the punching process, effectively preventing the thin-walled square tube from collapsing, deforming, or distorting the hole shape under the punching force. Simultaneously, the punch module 220 and the lower die body 120 are detachably connected, facilitating quick die replacement according to different hole shapes (such as round holes, oblong holes, etc.), improving equipment versatility and production flexibility. The entire device uses punching technology to replace traditional drilling, significantly improving processing efficiency, reducing tool wear and energy consumption, and avoiding the heat-affected zone and oxidation problems caused by hot working. While ensuring hole position accuracy and tube structure integrity, it achieves efficient, low-cost, and high-quality batch punching processing of square tube profiles.

[0022] In one possible implementation, the lower mold assembly 100 further includes at least one lower mold fixing plate 130, the lower mold base 110 has at least one mounting hole 111, the lower mold body 120 is disposed in the mounting hole 111, the lower mold fixing plate 130 is detachably fixed to the rear side of the lower mold base 110 and aligned with the mounting hole 111, the lower mold fixing plate 130 is used to pass through fastening bolts, and the fastening bolts are used to screw the lower mold body 120.

[0023] Specifically, by setting a detachable lower die fixing plate 130 on the rear side of the lower die base 110, and using fastening bolts to lock the lower die body 120 into the mounting hole 111 of the lower die base 110 from the rear, not only is the stable installation and quick replacement of the lower die body 120 achieved, but also the fastening structure on the front side of the lower die base 110 (i.e., the square tube insertion side) is avoided. This ensures that the square tube profile can be smoothly and without interference into the lower die body 120, improving positioning accuracy and operating efficiency. At the same time, this structure enhances the impact resistance and support rigidity of the lower die body 120 during the punching process, effectively preventing loosening or displacement caused by punching reaction force, ensuring the consistency and stability of punching quality, and has the advantages of simple structure, convenient maintenance, and strong adaptability. It is particularly suitable for the square tube punching needs in multi-variety, small-batch or high-cycle production scenarios.

[0024] In one possible implementation, the lower mold base 110 has a plurality of screw holes 112 extending to the mounting hole 111, and bolts are threaded into the screw holes 112 for reinforcing and fixing the lower mold body 120.

[0025] Specifically, by setting multiple screw holes 112 extending to the mounting hole 111 on the lower die base 110, and screwing bolts into the screw holes 112 to directly press the lower die body 120 radially or laterally, a multi-point constraint auxiliary fixing structure is formed. This not only significantly enhances the ability of the lower die body 120 to resist punching force and vibration during punching, preventing it from loosening, shifting or falling off, but also forms an "axial + radial" composite fixing method with the axial locking of the rear lower die fixing plate 130, greatly improving the overall rigidity and positioning accuracy. This design effectively improves the stability and service life of the die system without adding a complex structure, while facilitating flexible adjustment of the pressing position and force according to actual working conditions, taking into account reliability and maintainability. It is particularly suitable for high-frequency, high-precision square tube profile punching operations.

[0026] In one possible implementation, the lower die assembly 100 further includes an upper die pusher plate 140 detachably disposed on the front side of the lower die base 110, the upper die pusher plate 140 being located above the lower die body 120, and the upper die pusher plate 140 having a guide hole 141 for the punch module 220 to pass through.

[0027] Specifically, by detachably setting an upper die pusher plate 140 above the lower die body 120 on the front side of the lower die base 110, and opening guide holes 141 aligned with the punch module 220 on the pusher plate, not only is precise downward guidance provided for the punch module 220, improving the centering and stability during the punching process, but it can also automatically peel off the waste material or square tube residue stuck on the punch downward when it moves upward with the upper die assembly 200 after punching, realizing the automatic pusher function, effectively preventing problems such as hole blockage and secondary stamping damage caused by waste material being carried out or accumulating; at the same time, the pusher plate adopts a detachable structure, which is convenient to flexibly replace according to different hole types or punch layouts, taking into account guiding accuracy, waste removal efficiency and maintenance convenience, significantly improving the continuity, safety and finished product quality of the punching operation.

[0028] In one possible implementation, the lower mold assembly 100 also includes a support tripod 150 for improving the stability of the lower mold body 120.

[0029] Specifically, by adding a support triangle 150 to the lower die assembly 100 and connecting it between the lower die base 110 and the lower die body 120 or at the bottom of the lower die base 110, the geometric stability of the triangle structure is utilized to effectively enhance the ability of the lower die body 120 to resist lateral forces and punching reaction forces during the punching process, and to prevent shaking, displacement or deformation caused by excessive force.

[0030] In one possible implementation, the portion of the lower mold body 120 that protrudes from the lower mold base 110 has a guide ramp 122 for guiding the square tube profile.

[0031] Specifically, by setting a guide slope 122 on the part of the lower die body 120 that protrudes from the lower die base 110, it can play an automatic centering and guiding role during the installation of square tube profiles, reduce the difficulty of manual positioning, and improve the feeding efficiency and ease of operation. The guide slope 122 smoothly guides the inner wall of the square tube into the punching position of the lower die body 120, effectively avoiding problems such as tube wall scratches, jamming or punching misalignment caused by assembly deviations, while reducing impact wear on the edge of the lower die body 120.

[0032] In one possible implementation, the bottom of the mounting base 210 has at least one mounting groove, and the punch module 220 includes a punch fixing block 221 detachably disposed in the mounting groove and a punch body 222 disposed in the punch fixing block 221.

[0033] Specifically, by setting an installation groove at the bottom of the mounting base 210 and designing the punch module 220 as a detachable structure consisting of a punch fixing block 221 and a punch body 222, the punch fixing block 221 can be quickly embedded or replaced in the installation groove, thereby achieving flexible assembly and efficient maintenance of the punch module 220. The punch body 222 is fixed on the punch fixing block 221, ensuring stable force and accurate positioning during punching. At the same time, when the punch is worn or the hole type needs to be changed, only the corresponding punch fixing block 221 and punch body 222 need to be replaced, without disassembling the entire upper die assembly 200, which significantly improves the equipment's changeover efficiency and production flexibility.

[0034] In one possible implementation, the upper mold assembly 200 further includes at least two guide posts 230 and guide sleeves 240 that match the at least two guide posts 230. The guide sleeves 240 are disposed through the mounting base 210. One end of the guide post 230 is fixed to the frame 400, and the other end passes through the guide sleeve 240.

[0035] Specifically, by setting at least two guide posts 230 and matching guide sleeves 240 in the upper die assembly 200, wherein the guide sleeve 240 passes through the mounting base 210, one end of the guide post 230 is fixed to the frame 400 and the other end slides through the guide sleeve 240, a high-precision vertical lifting guide mechanism is formed. This structure effectively limits the lateral offset and sway of the upper die assembly 200 during the punching process, ensuring that the punch module 220 is always accurately aligned with the lower die hole 121 in the vertical direction, significantly improving the punching position accuracy and hole shape consistency. At the same time, the dual-guide or multi-guide design enhances the smoothness of the upper die movement and the anti-eccentric load capacity, reduces abnormal wear of the punch and die, extends the service life of the equipment, and helps to reduce vibration and noise during the punching process.

[0036] In one possible implementation, the punching power mechanism 300 includes a linear drive 310 and a connector 320 for connecting the linear drive 310 to the mounting base 210.

[0037] Specifically, by using a linear actuator 310 as the punching power source and reliably connecting its output end to the mounting base 210 of the upper die assembly 200 through a connector 320, the punch module 220 achieves high-response, high-precision reciprocating linear motion. The linear actuator 310 (such as a hydraulic cylinder, pneumatic-hydraulic booster cylinder, or servo electric cylinder) can provide stable and controllable punching force and stroke. Combined with the rigid connection structure of the connector 320, it effectively transmits power and reduces energy loss, ensuring a smooth and efficient punching process.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0039] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A punching device for square tube profiles, characterized in that, include: The lower mold assembly (100) includes a lower mold base (110) and at least one lower mold body (120) detachably connected to the lower mold base (110). A portion of the lower mold body (120) protrudes from the front side of the lower mold base (110), and the portion of the lower mold body (120) protruding from the lower mold base (110) is used to insert a matching square tube profile and has a lower mold hole (121). The upper die assembly (200) includes a mounting base (210) and at least one punch module (220) detachably connected to the bottom of the mounting base (210). The punching power mechanism (300) is used to reciprocate linearly drive the upper die assembly (200) so that the punch module (220) cooperates with the lower die hole (121) to form a through hole in the square tube profile; A frame (400) is used to mount the lower die assembly (100) and the punching power mechanism (300).

2. The punching device for square tube profiles according to claim 1, characterized in that, The lower mold assembly (100) further includes at least one lower mold fixing plate (130). The lower mold base (110) has at least one mounting hole (111). The lower mold body (120) is disposed in the mounting hole (111). The lower mold fixing plate (130) is detachably fixed to the rear side of the lower mold base (110) and aligned with the mounting hole (111). The lower mold fixing plate (130) is used to pass through fastening bolts, and the fastening bolts are used to screw the lower mold body (120).

3. The punching device for square tube profiles according to claim 2, characterized in that, The lower mold base (110) has a plurality of screw holes (112) extending to the mounting hole (111), and bolts are screwed into the screw holes (112) for reinforcing and fixing the lower mold body (120).

4. The punching device for square tube profiles according to claim 1, characterized in that, The lower die assembly (100) also includes an upper die pusher plate (140) detachably disposed on the front side of the lower die base (110). The upper die pusher plate (140) is located above the lower die body (120), and the upper die pusher plate (140) has a guide hole (141) for the punch module (220) to pass through.

5. The punching device for square tube profiles according to claim 1, characterized in that, The lower mold assembly (100) also includes a support tripod (150) for improving the stability of the lower mold body (120).

6. The punching device for square tube profiles according to claim 1, characterized in that, The portion of the lower mold body (120) that protrudes from the lower mold base (110) has a guide slope (122) for guiding the square tube profile.

7. The punching device for square tube profiles according to claim 1, characterized in that, The bottom of the mounting base (210) has at least one mounting groove, and the punch module (220) includes a punch fixing block (221) detachably disposed in the mounting groove and a punch body (222) disposed in the punch fixing block (221).

8. The punching device for square tube profiles according to claim 1, characterized in that, The upper mold assembly (200) also includes at least two guide posts (230) and guide sleeves (240) that match the at least two guide posts (230). The guide sleeves (240) are disposed through the mounting base (210). One end of the guide post (230) is fixed to the frame (400), and the other end passes through the guide sleeve (240).

9. The punching device for square tube profiles according to any one of claims 1-8, characterized in that, The punching power mechanism (300) includes a linear driver (310) and a connector (320) for connecting the linear driver (310) to the mounting base (210).

10. The punching device for square tube profiles according to claim 9, characterized in that, The linear actuator (310) is a hydraulic cylinder, an electric cylinder, or a pneumatic cylinder.

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