Pipe fitting arc punching device

Abstract

The invention relates to the technical field of metal processing, and discloses a pipe fitting arc punching device. The assembly plate is rotationally assembled between the lower die base and the upper die base, and then the assembly plate is pushed by the third push cylinder to adjust the setting angle of the die assembly, so that a cutter avoids a preset cambered surface part of a pipe fitting body through adjustment of the reversing mechanism during blanking, and then the direction of the pipe fitting body is corrected during reversing; and one end of the pipe fitting body is corrected to the cutting path of the cutter, so that accurate cutting of the pipe fitting body is realized, and the sinking condition is avoided. The arc punching device solves the problems that according to an existing arc punching device, when a cut-off knife makes contact with the surface of a pipe fitting for the first time, local recession is likely to happen to a contact point, large errors are generated when the cut-off knife is in butt joint with a corresponding arc face subsequently, the butt joint precision degree is lowered, and the high-precision connection requirement is difficult to meet.

Description

Technical Field

[0001] This invention relates to the field of metal processing technology, specifically to a pipe fitting arc punching device. Background Technology

[0002] In the field of pipe fitting processing, it is often necessary to punch one end of the pipe fitting into an arc shape to achieve a precise connection with a matching arc surface (usually the arc surface of another pipe fitting). For this purpose, existing arc punching devices have emerged, which mainly consist of a clamping die and a cutting blade. Both the clamping die and the cutting blade are designed with a matching arc structure to punch one end of the pipe fitting into the required arc shape, thereby meeting the connection requirements between pipe fittings.

[0003] However, in the actual pipe blanking process, the initial contact between the cutter and the pipe surface often causes a localized depression at the contact point. This phenomenon is particularly pronounced when cutting pipes with thinner walls. The presence of this localized depression results in a significant error when the arc at one end of the blanked pipe aligns with the corresponding arc surface, thus greatly reducing the precision of the connection and making it difficult to meet the requirements for high-precision connections. Summary of the Invention

[0004] The purpose of this invention is to provide a pipe punching device that solves the problem that when the cutting blade first contacts the surface of the pipe in existing punching devices, local depressions easily occur at the contact point. These local depressions cause a large error when the arc shape of one end of the pipe after punching is aligned with the corresponding arc surface, resulting in a reduction in the precision of the connection and making it difficult to meet the requirements of high-precision connection.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pipe fitting arc-punching device, comprising: The lower die base and the movable upper die base are provided. A punch is movably mounted on one side of the lower die base. A cutting blade for cutting the pipe body is mounted on one end of the punch. Cutting edges are provided on both sides of the cutting blade. The mold assembly includes a lower module and an upper module. The lower module and the upper module are used to clamp the pipe body and cooperate with the cutter to punch and cut the pipe body. The lower module and the upper module are respectively assembled on the lower mold base and the upper mold base. A reversing mechanism for adjusting the setting angle of the mold assembly is also assembled between the lower mold base and the upper mold base. The reversing mechanism is rotatably connected to the lower mold base and the upper mold base. The mold assembly is rotated by the reversing mechanism to change the initial position of the cutter punching the pipe body, without changing the end position of the punching of the pipe body. The reversing mechanism pushes the mold assembly to control the pipe body to be in an inclined state. The cutting blade performs a preliminary punching on the inclined pipe body. Then, the reversing mechanism controls the mold assembly to straighten the pipe body. Immediately afterwards, the returning cutting blade punches the pipe body again.

[0006] As a further description of the above technical solution: the reversing mechanism includes two assembly plates, which are rotatably assembled on the upper side of the lower mold base and the lower side of the upper mold base, respectively. The assembly plates are rotatably connected to the lower mold base or the upper mold base through a rotating column on the lower surface. The lower module and the upper module are respectively assembled on the surfaces of the two assembly plates.

[0007] As a further description of the above technical solution: the reversing mechanism also includes a push cylinder three mounted on the lower mold base, and the output end of the push cylinder three is movably connected to the assembly plate mounted on the lower mold base through a connecting rod; The mounting plate is pushed by the pusher cylinder three to adjust the setting angle of the mold assembly on the lower mold base.

[0008] As a further description of the above technical solution: the lower mold base and the upper mold base have the same structural structure, and the upper mold base is symmetrically arranged directly above the lower mold base; The upper surface of the lower mold base is provided with an assembly groove for assembling an assembly plate, and the bottom surface of the assembly groove is provided with a rotation groove for rotating an assembly rotating column. The assembly plate is rotatably assembled inside the assembly groove with the rotating column as the axis.

[0009] As a further description of the above technical solution: the lower module and the upper module have the same structural construction; The lower module has a clamping groove on its surface to accommodate the pipe fitting body. The lower module has a cutting surface 1 on one side that works with a cutting blade to punch one end of the pipe fitting body into a preset arc surface. The part where the clamping groove connects with the cutting surface 1 and is away from the cutting blade is the punching end point. The punching end point is coaxial with the rotating column.

[0010] As a further description of the above technical solution: a second cutting surface is also provided on the side of the first cutting surface away from the cutting blade; The second cutting surface is in an inclined state in the lower module, which is adapted to the movement path of the cutting blade.

[0011] As a further description of the above technical solution: the lower module and the upper module are detachably connected to the two assembly plates; The cutting blade and the punch rod are detachably connected.

[0012] As a further description of the above technical solution: the upper mold base is provided with a push cylinder 1 for pushing the upper mold base closer to the lower mold base, and the punch rod is provided with a push cylinder 2 for pushing its movement at one end.

[0013] As a further description of the above technical solution: a cleaning mechanism is also provided on one side of the lower die base. The cleaning mechanism is used to clean the metal shavings generated by the cutting blade during the return stroke when punching the pipe body.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: the assembly plate is rotatably assembled between the lower mold base and the upper mold base by the rotating column, and is pushed by the push cylinder three, which can adjust the setting angle of the mold assembly. When the cutting blade is punched, it avoids the preset arc surface part of the pipe body through the adjustment of the reversing mechanism. Subsequently, the pipe body corrects its orientation when reversing, and corrects one end of the pipe body to the cutting path of the cutting blade, thereby realizing the accurate cutting of the pipe body and avoiding the occurrence of dents. This effectively solves the problem of docking accuracy caused by local dents in the pipe body during the punching operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the lower mold base, lower module, and reversing mechanism of the present invention; Figure 4 This is a schematic diagram of the upper mold base and upper module structure of the present invention; Figure 5 This is a top view of the lower mold base, lower module, and reversing mechanism of the present invention; Figure 6 This is a schematic diagram of the lower mold base structure of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the lower module and assembly plate of the present invention; Figure 8 This is a schematic diagram showing the cutting blade of the present invention in its initial position on the lower die holder; Figure 9 This is a schematic diagram of the cutting blade cutting the inclined pipe body according to the present invention; Figure 10 This is a schematic diagram showing the state of the pipe body after it has been cut and aligned by the cutting tool according to the present invention.

[0016] In the diagram: 11. Lower die base; 111. Assembly slot; 112. Rotating slot; 12. Upper die base; 13. Punch rod; 14. Cutting blade; 15. Push cylinder one; 16. Push cylinder two; 20. Die assembly; 21. Lower module; 211. Clamping slot; 212. Cutting face one; 213. Cutting face two; 214. Punching end point; 22. Upper module; 30. Reversing mechanism; 31. Assembly plate; 32. Rotating column; 33. Push cylinder three; 331. Connecting rod; 40. Pipe body; 50. Cleaning mechanism. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0019] like Figures 1 to 10 As shown, this invention relates to a pipe fitting punching device, the main structure of which includes a lower die base 11, a movable upper die base 12, and a die assembly 20 assembled between the two. A push cylinder 15 is provided on the upper side of the upper die base 12, its function being to push the upper die base 12 towards the lower die base 11. Simultaneously, a punch 13 is movably mounted on one side of the lower die base 11, one end of which is connected to a push cylinder 16 for driving the movement of the punch 13. A cutter 14 is mounted on the other end of the punch 13, with cutting edges on both sides for cutting the pipe fitting body 40.

[0020] The mold assembly 20 consists of a lower module 21 and an upper module 22. Its main function is to clamp the pipe body 40 and work in conjunction with the cutter 14 to complete the arc cutting of the pipe body 40. Specifically, the lower module 21 and the upper module 22 are respectively mounted on the lower mold base 11 and the upper mold base 12. Through the pushing action of the pusher cylinder 15, the upper mold base 12 moves closer to the lower mold base 11, causing the lower module 21 and the upper module 22 to merge, thereby firmly clamping the pipe body 40. On this basis, the pusher cylinder 26 further pushes the punch 13, so that the cutter 14 performs arc cutting on the clamped pipe body 40.

[0021] Further integration Figures 3 to 10 A reversing mechanism 30 is also assembled between the lower die holder 11 and the upper die holder 12. Its main function is to adjust the setting angle of the die assembly 20. The reversing mechanism 30 is rotatably connected to the lower die holder 11 and the upper die holder 12. By controlling the rotation of the die assembly 20, the initial position of the cutter 14 punching the pipe body 40 can be changed, but the end point of the punching will not be changed. The specific structure of the reversing mechanism 30 includes two mounting plates 31, which are rotatably mounted on the upper side of the lower die holder 11 and the lower side of the upper die holder 12, respectively. The mounting plates 31 are rotatably connected to the lower die holder 11 or the upper die holder 12 through the rotating column 32 on their lower surface. The lower module 21 and the upper module 22 are respectively mounted on the surfaces of the two mounting plates 31.

[0022] In addition, the reversing mechanism 30 also includes a push cylinder 33 mounted on the lower mold base 11, the output end of which is movably connected to the mounting plate 31 mounted on the lower mold base 11 via a connecting rod 331. Through the pushing action of the push cylinder 33, the mounting plate 31 can adjust the setting angle of the mold assembly 20 on the lower mold base 11.

[0023] In the specific operation process, such as Figure 9 As shown, the reversing mechanism 30 first pushes the mold assembly 20, causing the pipe body 40 to be in an inclined state. At this time, the cutter 14 performs preliminary punching on the inclined pipe body 40. The purpose of this is to ensure that the recessed position created when the cutter 14 first contacts the surface of the pipe body 40 avoids the pre-designed curved surface on one side of the pipe body 40. Subsequently, as... Figure 10 As shown, the reversing mechanism 30 controls the mold assembly 20 to align the pipe body 40. At this time, the portion of the pipe body 40 protruding from the lower module 21 is corrected to the cutting path of the cutter 14. Immediately afterwards, the cutter 14 punches the pipe body 40 again during the return stroke, thus punching one end of the pipe body 40 into a preset bevel.

[0024] It should be noted that during the rotation of the pipe body 40 driven by the lower module 21, the endpoint of the pipe body 40 being cut by the cutter 14 is always located on the cutting path of the cutter 14. Therefore, during the initial cutting by the cutter 14, the side of the pipe body 40 furthest from the punch 13 will be cut into place. Subsequently, during the return cutting by the cutter 14, the side of the pipe body 40 corresponding to the return direction of the cutter 14 will have an opening. Therefore, during the return cutting process, the cutter 14 can not only cut one side of the pipe body 40 into a preset arc surface, but also effectively avoid the occurrence of dents.

[0025] Furthermore, such as Figures 4 to 7 As shown, the lower mold base 11 and the upper mold base 12 have the same structure, and the upper mold base 12 is symmetrically arranged directly above the lower mold base 11. An assembly groove 111 is provided on the upper surface of the lower mold base 11 for assembling the assembly plate 31. A rotating groove 112 is provided at the bottom of the assembly groove 111 for rotating the rotating column 32. The assembly plate 31 is rotated and assembled inside the assembly groove 111 about the rotating column 32 as an axis.

[0026] The lower module 21 and the upper module 22 have the same structure. The surface of the lower module 21 is provided with a clamping groove 211 for fitting and clamping the pipe body 40. One side of the lower module 21 is also provided with a cutting surface 212, which works with the cutting blade 14 to punch one end of the pipe body 40 into a preset arc surface. The connection between the clamping groove 211 and the cutting surface 212, and the position away from the cutting blade 14, is the punching endpoint 214. The punching endpoint 214 is coaxial with the rotating column 32, and its position corresponds to the endpoint position of the pipe body 40 initially punched by the cutting blade 14. When the mold assembly 20 fixes and clamps the pipe body 40 and rotates and adjusts it around the position of the punching endpoint 214, it can ensure that the endpoint position of the pipe body 40 punched by the cutting blade 14 remains fixed. In this way, when the cutter 14 is cutting the pipe body 40 during the return stroke, it can cut back along the cut position on one side of the pipe body 40, thereby effectively avoiding the pre-set arc surface from being concave.

[0027] Combination Figures 7 to 10 A second cutting surface 213 is also provided on the side of the first cutting surface 212 away from the cutting blade 14. When the lower module 21 is tilted, the second cutting surface 213 adapts to the movement path of the cutting blade 14. Specifically, when the mold assembly 20 is tilted, the second cutting surface 213 can adapt to the movement path of the cutting blade 14, avoiding obstruction to the movement of the cutting blade 14.

[0028] like Figure 1 and Figure 7 As shown, both the lower module 21 and the upper module 22 are assembled onto the two assembly plates 31 via a detachable connection structure, and the cutter 14 is also assembled onto the punch 13 via a detachable connection structure. Specifically, the lower module 21 is detachably assembled onto the assembly plate 31 via corresponding bolts, and the cutter 14 is detachably assembled onto the punch 13 via corresponding bolts.

[0029] This detachable connection structure offers significant advantages. When punching pipe bodies 40 of different diameters is required, operators can quickly adjust the device to meet new punching needs simply by changing the corresponding die assembly 20 and cutter 14 according to the specific size and shape of the pipe. This design not only improves the versatility and flexibility of the device but also greatly reduces equipment adjustment time and costs associated with changing pipe specifications, thereby increasing production efficiency and equipment utilization.

[0030] like Figures 1 to 3 As shown, a cleaning mechanism 50 is also provided on one side of the lower die base 11. Its main function is to clean up the metal shavings generated by the cutter 14 during the return process when it punches the pipe body 40.

[0031] The cleaning mechanism 50 includes a cylinder and a discharge groove (not shown) on the surface of the lower die base 11. After the punch 13 pulls the cutter 14 back to its original position and reaches the inside of the cleaning mechanism 50, the cylinder is positioned above the location where the metal chips are, while the discharge groove is positioned below the location where the metal chips are. At this time, the cylinder is activated, and a strong airflow blows the metal chips, smoothly expelling them through the discharge groove, thus efficiently completing the metal chip cleaning operation. This design avoids interference from metal chips in subsequent processing, improving the operating efficiency and processing quality of the equipment.

[0032] The working principle of this invention is as follows: First, the push cylinder 15 pushes the upper mold base 12 towards the lower mold base 11, causing the lower module 21 and upper module 22 in the mold assembly 20 to merge, thereby firmly clamping the pipe body 40. Next, the reversing mechanism 30 pushes the assembly plate 31 through the push cylinder 33, causing the mold assembly 20 to rotate and placing the pipe body 40 in an inclined state. At this time, the cutter 14, pushed by the punch 13, performs preliminary cutting on the inclined pipe body 40. The recessed position generated by the initial contact between the cutter 14 and the surface of the pipe body 40 is designed to avoid the preset arc surface part on one side of the pipe body 40. Subsequently, the reversing mechanism 30 operates again to straighten the pipe body 40. At this time, the part of the pipe body 40 protruding from the lower module 21 at one end will be corrected to the cutting path of the cutter 14. Immediately afterwards, the cutter 14 cuts the pipe body 40 again during the return stroke, completing the cutting of the preset arc surface at one end of the pipe body 40. Throughout the process, the cleaning mechanism 50 uses a cylinder to blow the metal shavings generated during punching into the discharge chute, ensuring a clean working environment and improving equipment operating efficiency and processing quality. This design not only solves the problem of localized dents common in traditional punching processes, but also improves the versatility and flexibility of the device through a detachable connection structure, enabling it to quickly adapt to the punching needs of pipe fittings 40 with different diameters.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pipe fitting arc-punching device, characterized in that, include: The lower mold base (11) and the movable upper mold base (12) are provided. A punch (13) is movably mounted on one side of the lower mold base (11). A cutter (14) for cutting the pipe body (40) is mounted on one end of the punch (13). The cutter (14) has cutting edges on both sides. The mold assembly (20) includes a lower module (21) and an upper module (22). The lower module (21) and the upper module (22) are used to clamp the pipe body (40) and cooperate with the cutter (14) to punch and cut the pipe body (40). The lower module (21) and the upper module (22) are respectively mounted on the lower mold base (11) and the upper mold base (12). The lower mold base (11) and the upper mold base (12) are also equipped with a reversing mechanism (30) for adjusting the setting angle of the mold assembly (20). The reversing mechanism (30) is rotatably connected to the lower mold base (11) and the upper mold base (12). The reversing mechanism (30) controls the rotation of the mold assembly (20) to change the initial position of the cutter (14) punching the pipe body (40) without changing the end point of the punching of the pipe body (40). The reversing mechanism (30) pushes the mold assembly (20) to control the pipe body (40) to be in an inclined state. The cutting blade (14) performs a preliminary punching on the inclined pipe body (40). Then, the reversing mechanism (30) controls the mold assembly (20) to straighten the pipe body (40). Immediately afterwards, the returning cutting blade (14) punches the pipe body (40) again.

2. The pipe fitting arc-punching device according to claim 1, characterized in that: The reversing mechanism (30) includes two assembly plates (31), which are rotatably mounted on the upper side of the lower mold base (11) and the lower side of the upper mold base (12), respectively. The assembly plates (31) are rotatably connected to the lower mold base (11) or the upper mold base (12) through the rotating column (32) on the lower surface. The lower module (21) and the upper module (22) are respectively assembled on the surfaces of the two assembly plates (31).

3. The pipe fitting arc-punching device according to claim 1, characterized in that: The reversing mechanism (30) also includes a push cylinder three (33) mounted on the lower mold base (11), and the output end of the push cylinder three (33) is movably connected to the assembly plate (31) mounted on the lower mold base (11) via a connecting rod (331); The mounting plate (31) is pushed by the push cylinder three (33) to adjust the setting angle of the mold assembly (20) on the lower mold base (11).

4. The pipe fitting arc-punching device according to claim 3, characterized in that: The lower mold base (11) and the upper mold base (12) have the same structure, and the upper mold base (12) is symmetrically arranged directly above the lower mold base (11); The upper surface of the lower mold base (11) is provided with an assembly groove (111) for assembling the assembly plate (31), and the bottom surface of the assembly groove (111) is provided with a rotating groove (112) for rotating the rotating column (32). The assembly plate (31) is rotatably assembled inside the assembly groove (111) with the rotating column (32) as the axis.

5. The pipe fitting arc-punching device according to claim 4, characterized in that: The lower module (21) and the upper module (22) have the same structural construction; The lower module (21) has a clamping groove (211) on its surface that is adapted to clamp the pipe body (40). The lower module (21) has a cutting surface (212) on one side that works with the cutting blade (14) to punch one end of the pipe body (40) into a preset arc surface. The part where the clamping groove (211) connects with the cutting surface (212) and is far away from the cutting blade (14) is the punching end point (214). The punching end point (214) is coaxial with the rotating column (32).

6. The pipe fitting arc-punching device according to claim 5, characterized in that: A second cutting surface (213) is also provided on the side of the first cutting surface (212) away from the cutting blade (14). The second cutting surface (213) is in an inclined state in the lower module (21) to adapt to the movement path of the cutting blade (14).

7. The pipe fitting arc-punching device according to claim 6, characterized in that: The lower module (21) and the upper module (22) are detachably connected to the two assembly plates (31); The cutter (14) and the punch (13) are detachably connected.

8. The pipe fitting arc-punching device according to claim 1, characterized in that: The upper mold base (12) is provided with a push cylinder 1 (15) for pushing the upper mold base (12) towards the lower mold base (11), and the punch rod (13) is provided with a push cylinder 2 (16) for pushing its movement.

9. The pipe fitting arc-punching device according to claim 1, characterized in that: The lower die base (11) is also provided with a cleaning mechanism (50) on one side. The cleaning mechanism (50) is used to clean the metal chips generated by the cutter (14) punching the pipe body (40) during the return stroke.

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