Clamping fixture for pipe fitting machining

Abstract

The clamping fixture for pipe fitting machining comprises a base body, a core body supporting device, a pressing device and a jacking device, the core body supporting device is arranged in the center of the interior of the base body, the pressing device is arranged in the base body and is close to the core body supporting device, the jacking device is arranged in the base body, and the core body supporting device is arranged in the base body. One end of the cylinder is fixedly connected with the inner wall of the base body, the wedge block clamping device is connected into the cylinder in a matched mode and located on the surface position, and the arc-shaped elastic piece is arranged between the surface of the wedge block clamping device and the two corresponding sides of the inner wall of the cylinder. And the elastic bag body is arranged between the surface of the wedge block clamping device and the two corresponding sides of the inner wall of the cylinder and is close to the position of the arc-shaped elastic piece. According to the clamping fixture for pipe fitting machining, the effect of high adaptability is achieved, the clamping fixture can adapt to thin-wall pipe fittings, the thin-wall pipe fittings can be rapidly and effectively clamped, deformation or random movement is not prone to occurring, limitation is reduced, and the working efficiency and the using performance are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a clamping fixture for pipe processing. Background Art

[0002] Pipe fittings are a general term for parts that play the role of connection, control, direction change, diversion, sealing, support, etc. in pipeline systems. Fixtures are often used to clamp a certain component or product to facilitate the assembly or tightening of the product. With the continuous development of science and technology, the continuous progress of society, and the widespread use of pipe fittings, the processing of pipe fittings has gradually diversified. Among them, for pipe fitting processing equipment, pipe fitting fixing fixtures play a decisive role in the quality of pipe fitting processing. In the field of mechanical processing, thin-walled tubular workpieces are one of the difficulties in turning. Because of their thin walls, the processing rigidity is poor and processing deformation is very likely to occur, which increases the shape and position errors of the parts and makes it difficult to guarantee the processing quality of the workpiece.

[0003] At present, traditional pipe clamping fixtures have poor adaptability, especially for some thin-walled pipes. When the clamping force is large, the pipes are easily deformed. When the clamping force is small, they are prone to random movement or rotation. If subsequent processing is not utilized, there are great limitations, which affects work efficiency and reduces performance. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a clamping fixture for pipe fitting processing, which solves the problem that traditional pipe fitting clamping fixtures have poor adaptability, especially for some thin-walled pipe fittings. When the clamping force is large, the pipe fittings are easily deformed, and when the clamping force is small, the pipe fittings are easily moved or rotated at will, and subsequent processing is not utilized. There are great limitations, which affects work efficiency and reduces the problem of performance.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a clamping fixture for pipe processing, comprising a base, a core support device, a pressing device, and a pushing device, wherein the core support device is arranged at the inner central position of the base, the pressing device is arranged inside the base and close to the core support device, and the pushing device is arranged inside the base, the core support device is pushed outward by the pushing device, and as the pipe blank moves, pressure is applied to the pressing device, and then the pipe is fixed by supporting the inner wall of the pipe and clamping the surface in two directions at the same time. The whole device has a reasonable and simple structure, is quick and convenient to adapt, can adapt to thin-walled pipes, and clamps them quickly and effectively, is not easy to deform or move at will, reduces limitations, is helpful for subsequent processing, and improves work efficiency and performance; The core support device is provided with a cylinder, a wedge clamping device, an arc-shaped elastic member, and an elastic capsule. One end of the cylinder is fixedly connected to the inner wall of the base body. The wedge clamping device is cooperatively connected to the inside of the cylinder and is located at the surface position. The arc-shaped elastic member is arranged between the two sides corresponding to the surface of the wedge clamping device and the inner wall of the cylinder. The elastic capsule is arranged between the two sides corresponding to the surface of the wedge clamping device and the inner wall of the cylinder and close to the position of the arc-shaped elastic member. By twisting the threaded rod, the top block of the truncated cone moves toward the direction of the wedge clamping device, thereby clamping the roller and the wedge. The bottom of the device contacts, so that multiple groups of wedge clamping devices move toward the outside of the cylinder at the same time, and as the pressure continues to increase, the rolling of the rollers is used to reduce the friction between each other, which saves time and effort and helps to push out the wedge clamping devices. At this time, the evenly distributed wedge clamping devices support the inner wall of the pipe fitting to prevent it from rotating and moving at will. At the same time, as the wedge clamping devices move outward, the elastic bladder will be squeezed, and the inner wall of the pipe fitting will be elastically protected by air pressure. The entire structure is connected together, which is safe and reliable, realizes multiple functions, and improves performance.

[0006] Preferably, the wedge clamping devices are evenly distributed inside the cylinder, and the surface of the cylinder is provided with notches that match the wedge clamping devices.

[0007] Preferably, the wedge clamping device is provided with a wedge body, an air groove, an elastic membrane and an anti-slip layer. The surface of the wedge body is slidably connected to the cylinder, the air groove is opened at the top of the wedge body and is connected to the elastic bladder, the elastic membrane is arranged on the top of the wedge body and is located at the position of the air groove, and the anti-slip layer is arranged on the surface of the elastic membrane. When the wedge body is moved by the pushing of the frustum top block, the pressed elastic bladder discharges the internal gas into the air groove, and the gas pressure is used to make the elastic membrane drive the anti-slip layer to expand together. At this time, the anti-slip layer fits tightly with the inner wall of the pipe fitting, which not only provides elastic protection for the inner wall of the pipe fitting and reduces wear, but also increases friction to prevent the pipe fitting from moving or rotating, and fully utilizes the interaction and connection between the structures to connect the structures together to achieve multiple functions.

[0008] Preferably, the pressing device is provided with a support member, a swing rod, an elastic telescopic rod, and a clamping device, the top end of the support member is fixedly connected to the inner wall of the base, the surface of the swing rod is hinged to the bottom end of the support member, one end of the elastic telescopic rod is hinged to the end of the elastic telescopic rod, and the clamping device is arranged at the end of the swing rod away from the elastic telescopic rod.

[0009] Preferably, the clamping device is provided with a universal joint, a pressure block, and an anti-slip convex point. The top end of the universal joint is hinged with one end of the swing rod, the pressure block is cooperatively connected to the bottom end of the universal joint, and the anti-slip convex point is arranged at the central position of the bottom edge of the pressure block. As the wedge clamping device slowly moves, one end of the pipe fitting moves toward the inside of the base body. At this time, the end of the pipe fitting will contact the end of the elastic telescopic rod and push it, so that the swing rod drives the clamping device to the surface of the pipe fitting and clamps it. At the same time, under the universal connection between the universal joint and the pressure block, the pressure of the pressure block is always perpendicular to the surface of the pipe fitting, and under the action of the anti-slip convex point to increase the friction force and under the support of the wedge clamping device, the pipe fitting is effectively clamped, and the pushing force applied by the pipe fitting when it is placed is fully utilized, and the structure is connected together, which is safe and reliable, and the performance is improved.

[0010] Preferably, a groove matching the bottom end of the universal joint is provided at the center of the top of the pressing block, and the anti-slip protrusions are evenly distributed on the bottom of the pressing block.

[0011] Preferably, the pushing device is provided with a threaded rod, a frustoconical top block and a roller, wherein the threaded rod is threadedly connected to the surface of the base, the end of the threaded rod extends to the interior of the base, the frustoconical top block is rotatably connected to the end of the threaded rod and is located inside the base, and the roller is rotatably connected to the interior of the frustoconical top block and is located at a surface position.

[0012] Preferably, a threaded hole matched with the threaded rod is opened on the surface of the base, and the rollers are evenly distributed inside the top block of the truncated cone and located on the surface.

[0013] The present invention provides a clamping fixture for pipe processing, which has the following beneficial effects: (I) The clamping fixture for pipe processing includes a base, a core support device, a pressing device and a pushing device. The core support device is pushed outward by the pushing device, and as the pipe blank moves, pressure is applied to the pressing device, and then the pipe is fixed by supporting the inner wall of the pipe and clamping the surface in two directions at the same time. The whole device has a reasonable and simple structure, is quick and convenient to adapt, can adapt to thin-walled pipes, and clamp them quickly and effectively. It is not easy to deform or move at will, which reduces limitations, helps subsequent processing, and improves work efficiency and performance.

[0014] (ii) The clamping fixture for pipe processing comprises a pushing device, a threaded rod, a truncated cone top block, a roller, a cylinder, a wedge clamping device, an arc-shaped elastic member and an elastic bladder. The threaded rod is twisted to move the truncated cone top block toward the wedge clamping device, thereby causing the roller to contact the bottom of the wedge clamping device, thereby causing multiple groups of wedge clamping devices to move toward the outside of the cylinder at the same time. As the pressure continues to increase, the rolling of the rollers is used to reduce the friction between them, thereby saving time and effort and helping to push out the wedge clamping devices. At this time, the evenly distributed wedge clamping devices support the inner wall of the pipe fitting to prevent it from rotating and moving at will. At the same time, as the wedge clamping devices move toward the outside, the elastic bladder is squeezed and the inner wall of the pipe fitting is elastically protected by air pressure. The entire structure is connected together, which is safe and reliable, realizes multiple functions and improves performance.

[0015] (III) The clamping fixture for pipe processing includes a wedge block body, an air groove, an elastic membrane and an anti-skid layer. When the wedge block body is moved by the pushing of the truncated cone top block, the compressed elastic bladder discharges the internal gas into the air groove, and the elastic membrane drives the anti-skid layer to expand by utilizing the gas pressure. At this time, the anti-skid layer fits tightly with the inner wall of the pipe fitting, which not only provides elastic protection for the inner wall of the pipe fitting and reduces wear, but also increases friction to prevent the pipe fitting from moving or rotating, making full use of the interaction and connection between the structures, so that the structures are connected together to realize multiple functions.

[0016] (IV) The clamping fixture for pipe processing includes a support, a swing rod, an elastic telescopic rod, a clamping device, a universal joint, a pressure block, and anti-skid protrusions. As the wedge clamping device slowly moves, one end of the pipe moves toward the inside of the base. At this time, the end of the pipe will contact the end of the elastic telescopic rod and push it up, so that the swing rod drives the clamping device to the surface of the pipe and clamps it. At the same time, under the universal connection between the universal joint and the pressure block, the pressure of the pressure block is always perpendicular to the surface of the pipe. Under the action of the anti-skid protrusions to increase the friction force and under the support of the wedge clamping device, the pipe is effectively clamped, and the pushing force applied by the pipe when it is placed is fully utilized. The structure is connected together, which is safe and reliable, and the performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the clamping fixture for pipe processing of the present invention; Figure 2 It is a schematic diagram of the internal structure of the clamping fixture for pipe processing of the present invention; Figure 3 It is a structural schematic diagram of the core support device in the clamping fixture for pipe processing of the present invention; Figure 4It is a schematic diagram of the structure of the wedge clamping device in the clamping fixture for pipe processing of the present invention; Figure 5 It is a schematic diagram of the structure of the pressing device in the clamping fixture for pipe processing of the present invention; Figure 6 It is a schematic diagram of the structure of the clamping device in the clamping fixture for pipe processing of the present invention; Figure 7 It is a schematic diagram of the structure of the jacking device in the clamping fixture for pipe processing of the present invention.

[0018] In the figure: 1, base; 2, core support device; 3, pressing device; 4, pushing device; 21, cylinder; 22, wedge clamping device; 23, arc-shaped elastic member; 24, elastic capsule; 221, wedge body; 222, air groove; 223, elastic membrane; 224, anti-skid layer; 31, support member; 32, swing rod; 33, elastic telescopic rod; 34, clamping device; 341, universal joint; 342, pressure block; 343, anti-skid protrusion; 41, threaded rod; 42, frustum cone top block; 43, roller. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-7 The present invention provides a technical solution: a clamping fixture for pipe processing, comprising a base 1, a core support device 2, a pressing device 3, and a pushing device 4. The core support device 2 is arranged at the central position inside the base 1, the pressing device 3 is arranged inside the base 1 and close to the core support device 2, and the pushing device 4 is arranged inside the base 1. The core support device 2 is pushed outward by the pushing device 4, and as the pipe blank moves, pressure is applied to the pressing device 3, and then the pipe is fixed by supporting the inner wall of the pipe and clamping the surface in two directions at the same time. The whole device has a reasonable and simple structure, is quick and convenient to adapt, can adapt to thin-walled pipes, and clamp them quickly and effectively, is not easy to deform or move at will, reduces limitations, is helpful for subsequent processing, and improves work efficiency and performance.

[0021] The core supporting device 2 is provided with a cylinder 21, a wedge clamping device 22, an arc-shaped elastic member 23, and an elastic capsule 24. One end of the cylinder 21 is fixedly connected to the inner wall of the base 1, the wedge clamping device 22 is cooperatively connected to the inside of the cylinder 21 and is located at the surface position, the arc-shaped elastic member 23 is arranged between the two sides corresponding to the inner wall of the cylinder 21 on the surface of the wedge clamping device 22, and the elastic capsule 24 is arranged between the two sides corresponding to the inner wall of the cylinder 21 on the surface of the wedge clamping device 22 and close to the position of the arc-shaped elastic member 23.

[0022] The wedge clamping devices 22 are evenly distributed inside the cylinder 21 , and the surface of the cylinder 21 is provided with notches matched with the wedge clamping devices 22 .

[0023] The jacking device 4 is provided with a threaded rod 41, a truncated cone top block 42, and a roller 43. The threaded rod 41 is threadedly connected to the surface of the base 1, and the end of the threaded rod 41 extends to the inside of the base 1. The truncated cone top block 42 is rotatably connected to the end of the threaded rod 41 and is located inside the base 1. The roller 43 is rotatably connected to the inside of the truncated cone top block 42 and is located at the surface position. By twisting the threaded rod 41, the truncated cone top block 42 is moved toward the direction of the wedge clamping device 22, so that the roller 43 contacts the bottom of the wedge clamping device 22, so that the multiple groups of wedge clamps The tightening device 22 moves toward the outside of the cylinder 21 at the same time, and as the pressure continues to increase, the rolling of the roller 43 is used to reduce the friction between them, which saves time and effort and helps to push out the wedge clamping device 22. At this time, the evenly distributed wedge clamping devices 22 support the inner wall of the pipe fitting, thereby preventing it from rotating and moving at will. At the same time, as the wedge clamping device 22 moves outward, the elastic capsule 24 will be squeezed, and the inner wall of the pipe fitting is elastically protected by air pressure. The entire structure is connected together, which is safe and reliable, realizes multiple functions, and improves performance.

[0024] The wedge clamping device 22 is provided with a wedge body 221, an air groove 222, an elastic membrane 223, and an anti-slip layer 224. The surface of the wedge body 221 is slidably connected with the cylinder 21. The air groove 222 is opened at the top of the wedge body 221 and is connected with the elastic bladder 24. The elastic membrane 223 is arranged on the top of the wedge body 221 and is located at the position of the air groove 222. The anti-slip layer 224 is arranged on the surface of the elastic membrane 223. When the wedge body 221 is moved by the pushing of the frustum top block 42, the pressed elastic bladder 24 discharges the internal gas into the air groove 222, and the gas pressure is used to make the elastic membrane 223 drive the anti-slip layer 224 to expand together. At this time, the anti-slip layer 224 is tightly fitted with the inner wall of the pipe fitting, which not only elastically protects the inner wall of the pipe fitting and reduces wear, but also increases friction to prevent the pipe fitting from moving or rotating, making full use of the interaction and connection between the structures, so that the structures are connected together to achieve multiple functions.

[0025] The pressing device 3 is provided with a support member 31, a swing rod 32, an elastic telescopic rod 33, and a clamping device 34. The top end of the support member 31 is fixedly connected to the inner wall of the base 1, the surface of the swing rod 32 is hinged to the bottom end of the support member 31, one end of the elastic telescopic rod 33 is hinged to the end of the elastic telescopic rod 33, and the clamping device 34 is arranged at one end of the swing rod 32 away from the elastic telescopic rod 33.

[0026] The clamping device 34 is provided with a universal joint 341, a pressure block 342, and an anti-skid convex point 343. The top end of the universal joint 341 is hinged with one end of the swing rod 32, the pressure block 342 is cooperatively connected to the bottom end of the universal joint 341, and the anti-skid convex point 343 is arranged at the central position of the bottom edge of the pressure block 342. As the wedge clamping device 22 slowly moves, one end of the pipe fitting moves toward the inside of the base 1. At this time, the end of the pipe fitting will contact the end of the elastic telescopic rod 33 and push it up, so that the swing rod 32 drives the clamping device 34 to the surface of the pipe fitting and clamps it. At the same time, under the universal connection between the universal joint 341 and the pressure block 342, the pressure of the pressure block 342 is always perpendicular to the surface of the pipe fitting, and under the action of the anti-skid convex point 343 to increase the friction force, and under the support of the wedge clamping device 22, the pipe fitting is effectively clamped, and the pushing force applied by the pipe fitting when it is placed is fully utilized, and the structure is connected together, which is safe and reliable, and the performance is improved.

[0027] When in use, first place the entire device to the specified position, and use the screwing of the threaded rod 41 to move the truncated cone top block 42 toward the direction of the wedge clamping device 22, so that the roller 43 contacts the bottom of the wedge clamping device 22, so that multiple groups of wedge clamping devices 22 move toward the outside of the cylinder 21 at the same time, and as the pressure continues to increase, the rolling of the roller 43 is used to reduce the friction between each other, saving time and effort, and helping to push out the wedge clamping devices 22. At this time, the evenly distributed wedge clamping devices 22 support the inner wall of the pipe fitting, thereby preventing it from rotating and moving at will. At the same time, as the wedge clamping device 22 moves outward, the elastic capsule 24 will be squeezed, and the inner wall of the pipe fitting will be elastically protected by air pressure. When the wedge main body 221 is moved by the pushing of the truncated cone top block 42, the pressed elastic capsule 24 discharges the internal gas into the air groove 222, and the gas is used to push the wedge clamping device 22 out. The pressure causes the elastic film 223 to expand with the anti-skid layer 224. At this time, the anti-skid layer 224 fits tightly with the inner wall of the pipe fitting, which not only elastically protects the inner wall of the pipe fitting and reduces wear, but also increases friction to prevent the pipe fitting from moving or rotating. As the wedge clamping device 22 slowly moves, one end of the pipe fitting moves toward the inside of the base 1. At this time, the end of the pipe fitting will contact the end of the elastic telescopic rod 33 and push it up, thereby causing the swing rod 32 to drive the clamping device 34 toward the surface of the pipe fitting and clamp it. At the same time, under the universal connection between the universal joint 341 and the pressure block 342, the pressure of the pressure block 342 is always perpendicular to the surface of the pipe fitting. Under the action of the friction increased by the anti-skid protrusion 343 and the support of the wedge clamping device 22, the pipe fitting is effectively clamped, fully utilizing the pushing force applied by the pipe fitting when it is placed, and connecting the structures together, which is safe and reliable, and improves the performance.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping fixture for pipe processing, comprising a base (1), a core support device (2), a pressing device (3), and a pushing device (4), characterized in that: The core support device (2) is arranged at a central position inside the base (1), the pressing device (3) is arranged inside the base (1) and close to the core support device (2), and the pushing device (4) is arranged inside the base (1); The core support device (2) is provided with a cylinder (21), a wedge clamping device (22), an arc-shaped elastic member (23), and an elastic capsule (24); one end of the cylinder (21) is fixedly connected to the inner wall of the base (1); the wedge clamping device (22) is cooperatively connected to the inside of the cylinder (21) and is located at the surface; the arc-shaped elastic member (23) is arranged between the two sides of the surface of the wedge clamping device (22) corresponding to the inner wall of the cylinder (21); and the elastic capsule (24) is arranged between the two sides of the surface of the wedge clamping device (22) corresponding to the inner wall of the cylinder (21) and close to the arc-shaped elastic member (23).

2. A clamping fixture for pipe processing according to claim 1, characterized in that: The wedge clamping devices (22) are evenly distributed inside the cylinder (21), and a surface of the cylinder (21) is provided with notches that match the wedge clamping devices (22).

3. The clamping fixture for pipe processing according to claim 1, characterized in that: The wedge clamping device (22) is provided with a wedge body (221), an air groove (222), an elastic membrane (223), and an anti-slip layer (224); the surface of the wedge body (221) is slidably connected to the cylinder (21); the air groove (222) is provided at the top of the wedge body (221) and is in communication with the elastic sac (24); the elastic membrane (223) is provided at the top of the wedge body (221) and is located at the position of the air groove (222); and the anti-slip layer (224) is provided on the surface of the elastic membrane (223).

4. The clamping fixture for pipe processing according to claim 1, characterized in that: The pressing device (3) is provided with a support member (31), a swing rod (32), an elastic telescopic rod (33), and a clamping device (34); the top end of the support member (31) is fixedly connected to the inner wall of the base (1); the surface of the swing rod (32) is hinged to the bottom end of the support member (31); one end of the elastic telescopic rod (33) is hinged to the end of the elastic telescopic rod (33); and the clamping device (34) is arranged at one end of the swing rod (32) away from the elastic telescopic rod (33).

5. The clamping fixture for pipe processing according to claim 4, characterized in that: The clamping device (34) is provided with a universal joint (341), a pressure block (342), and an anti-slip convex point (343); the top end of the universal joint (341) is hinged to one end of the swing rod (32); the pressure block (342) is cooperatively connected to the bottom end of the universal joint (341); and the anti-slip convex point (343) is arranged at the center of the bottom edge of the pressure block (342).

6. The clamping fixture for pipe processing according to claim 5, characterized in that: A groove matching the bottom end of the universal joint (341) is provided at the center of the top of the pressing block (342), and the anti-slip convex points (343) are evenly distributed at the bottom of the pressing block (342).

7. The clamping fixture for pipe processing according to claim 1, characterized in that: The jacking device (4) is provided with a threaded rod (41), a truncated cone top block (42), and a roller (43); the threaded rod (41) is threadedly connected to the surface of the base (1); the end of the threaded rod (41) extends into the interior of the base (1); the truncated cone top block (42) is rotatably connected to the end of the threaded rod (41) and is located inside the base (1); and the roller (43) is rotatably connected to the interior of the truncated cone top block (42) and is located at the surface.

8. The clamping fixture for pipe processing according to claim 7, characterized in that: The surface of the base body (1) is provided with a threaded hole matched with the threaded rod (41), and the rollers (43) are evenly distributed inside the truncated cone top block (42) and are located on the surface.

Images