Pressing process and pressing device for pipeline with stepless regulation function

Abstract

The invention discloses a pipeline pressing process with a stepless regulation function and a pressing device, and relates to the technical field of crimping machines.The pipeline pressing process comprises the following steps that a driver drives a crimping head assembly to rotate forwards and backwards through a driving shaft, pressing and releasing of materials are achieved, and the crimping surface of the crimping head assembly is an involute surface; pipes or wires with various diameters can be crimped, stepped shaft products can also be crimped, and the device does not need to be replaced; and the crimping surface of the crimping head can also be a second crimping head assembly with an involute cambered surface, so that the surface crimping effect of the pipeline can be improved. When cylindrical regular materials are crimped, each crimping head assembly is uniformly stressed; when a material with a special shape is crimped, deep or shallow crimping can occur in one or some crimping head assemblies, and under the action of isostatic pressing, pressure equalization is finally realized, and excessive pressure can be released through the overflow valve.

Description

Technical Field

[0001] The invention relates to the technical field of crimping machines, in particular to a pipeline pressing process and a pressing device with a stepless adjustment function. Background Art

[0002] Traditional pipe and wire crimping devices mainly use a circumferentially distributed "wedge-shaped" stamping die to move centripetally to achieve center crimping. This structure can usually only crimp a group of products of a specific size. For materials of different diameters, multiple specifications need to be produced. Such a structure requires a large number of types of dies and crimping devices, resulting in high manufacturing costs and poor adaptability of the equipment. When it comes to special products, special dies need to be customized to complete the processing.

[0003] Therefore, there is an urgent need for a device and process that can meet the requirements of various diameter specifications and common multi-specification pipes for crimping or riveting. Summary of the Invention

[0004] The object of the present invention is to provide a pipeline pressing process and a pressing device with a stepless adjustment function to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pipeline compacting process with a stepless adjustment function, the compacting process comprising the following specific steps:

[0007] S1, the bidirectional variable hydraulic pump pumps the hydraulic oil into the pressure storage tank, and then transmits it to the actuator through the hydraulic pipeline;

[0008] S2, the driver drives the first crimping head assembly or the second crimping head assembly to rotate;

[0009] S3, crimping the pipe or wire during the rotation of the first crimping head assembly or the second crimping head assembly;

[0010] S4. After the crimping is completed, the first crimping head assembly or the second crimping head assembly is reset, and the pipe or wire is output.

[0011] Preferably, the S2 includes the following steps: S201, the drivers are connected in parallel;

[0012] The S3 includes the following steps: S301, crimping a regularly shaped pipe or wire, and each of the first crimping head assembly or the second crimping head assembly will receive relatively equal pressure.

[0013] Preferably, the S2 includes the following steps: S201, the drivers are connected in series;

[0014] The S3 includes the following steps: S301, crimping the special-shaped pipe or wire, each of the first crimping head assembly or the second crimping head assembly will adjust the pressure of the individual crimping head according to the crimping requirements of the crimped material.

[0015] A pipeline compression device with a stepless adjustment function includes a frame, a bracket, a compression head assembly, a drive shaft, a driver, a two-way variable hydraulic pump, a filter, a relief valve, a pressure storage tank and a hydraulic pipeline. The two-way variable hydraulic pump transports the hydraulic oil to the pressure storage tank through the filter and the relief valve, and the hydraulic oil is output from the pressure storage tank to the outside through the hydraulic pipeline. The hydraulic pipeline is connected to the driver. A plurality of brackets are provided on the inner wall of the frame. A plurality of drivers are evenly distributed on the side of the bracket away from the inner wall of the frame. A compression head assembly is provided on one side of several of the drivers. The driver provides power to the compression head assembly. The plurality of compression head assemblies are enclosed on the side away from the bracket to form a compression channel. The compression head assembly includes a first compression head assembly and a second compression head assembly.

[0016] First, the pipe to be crimped is transported to the rack, the driver drives the crimping head assembly, the crimping head assembly rotates to form a designated crimping channel, and then the pipe is transported to the crimping channel for crimping, and the crimped pipe is output from the crimping channel.

[0017] Preferably, the frame is annular, and a plurality of the brackets are arranged around the axis of the frame, and an end of the bracket close to the axis is provided with an axial hole.

[0018] Several brackets are set inside the rack, and the brackets are evenly arranged around the rack. The shaft holes in the brackets can be used to place the drive shaft, and the drive shaft is connected to the press head assembly, so the brackets provide a stable structural support for the placement of the driver.

[0019] Preferably, a driving shaft is provided on the driver, the driver is connected to the bracket, the driving shaft of the driver passes through the shaft hole of the bracket, and the driving shaft is rotatably connected to the shaft hole.

[0020] The driver is preferably a bidirectional variable hydraulic motor. Both the driver and the bidirectional variable hydraulic pump can realize reliable switching between forward and reverse rotations to complete the compression and release control of material processing.

[0021] The bracket is connected to the driver, providing a fixed support function for the driver. The axial hole of the bracket is rotatably connected to the drive shaft, serving as a rotation support point for the drive shaft, and providing stable support and rotation guide for the placement of the crimping head assembly.

[0022] Preferably, the first crimping head assembly includes an involute surface and a web, the cross-section of the involute surface is triangular or fan-shaped, the involute surface and the web are vertically connected, a through hole is provided on the web, and the through hole is connected to the drive shaft.

[0023] When the driver moves, the driving shaft drives the through hole to rotate, thereby driving the first crimping head assembly to rotate. Since the involute surface is triangular or fan-shaped, several first crimping head assemblies can be opened and contracted and tightened under the drive of the driver. Several first crimping head assemblies are enclosed to form a crimping channel A, and the pipe or wire is crimped in the crimping channel.

[0024] Preferably, several of the drivers are connected in parallel and are connected to a pressure storage tank through a hydraulic pipeline. The pressure storage tank is connected to a bidirectional variable hydraulic pump and a filter. An overflow valve is provided on the pressure storage tank. The drivers are connected in parallel. The interior of the pressure storage tank is isostatic pressure, and each of the compression head assemblies will obtain relatively equal pressure.

[0025] When crimping regular materials, the driver rotates synchronously, causing the driver to drive several first crimping head assemblies to rotate synchronously. During the rotation process, the first crimping head assemblies contact the surface of the pipe at the same time, so that each crimping head assembly is evenly pressed on the surface of the sleeve, thereby completing the crimping process of the sleeve and the inner material.

[0026] When crimping special-shaped pipes, each driver drives the first crimping head assembly to rotate, so that the rotation angle of each first crimping head assembly is different. Then, when the first crimping head assembly contacts the sleeve, different first crimping head assemblies have different crimping areas on the sleeve, so that a deeper or shallower crimping surface will appear on the surface of the sleeve, thereby completing the crimping of the special-shaped material.

[0027] When the groove needs to be crimped, the first crimping head assembly rotates toward the side close to the crimping channel, and the angle of rotation of the two adjacent first crimping head assemblies of the first crimping head assembly is smaller than that of the first crimping head assembly; when the boss needs to be crimped, the first crimping head assembly rotates toward the side close to the crimping channel, and the angle of rotation of the two adjacent first crimping head assemblies of the first crimping head assembly is larger than that of the first crimping head assembly;

[0028] When pipes or wires of different diameters need to be crimped, the first crimping head assembly is driven to rotate by the driver so that the end of the first crimping head assembly away from the bracket is located at a, b, c, and d respectively, so that pipes or wires of different diameters need to be crimped; when a stepped shaft needs to be crimped (different diameters need to be crimped on one shaft), the rotation angle of the first crimping head assembly is adjusted multiple times so that the end of the first crimping head assembly away from the bracket is rotated to a, b, c, and d respectively, so that the crimping channel crimps the stepped shaft in batches and steps, so that the outer wall of the stepped shaft forms annular crimping bands of different diameters.

[0029] The driver can also be selected to be connected in series, and the pressure of individual crimping heads can be adjusted according to the crimping requirements of the crimped material.

[0030] The second crimping head assembly includes a cambered involute surface and a web. The cambered involute surface is an involute surface whose diameter continuously increases from the tip of the crimping surface to the other end face of the second crimping head assembly. The cambered involute surface can be set to an inward concave or outward convex structure according to process requirements, which can improve the effect of the clamping surface.

[0031] Because the crimping head assembly needs to complete forward and reverse motion, the driver drives the crimping head assembly to move, and the driver is driven by a bidirectional variable hydraulic pump. The driver needs to be a forward and reversible system, preferably a bidirectional variable hydraulic motor, so the driver can complete forward and reverse rotation, driving the crimping head assembly to rotate, forming crimping channels of different sizes. When the crimping head assembly rotates forward, the diameter of the crimping channel increases, and when the crimping head assembly rotates reversely, the diameter of the crimping channel decreases.

[0032] Preferably, the drive shaft and the through hole are provided with a flat keyway or a spline groove, and the drive shaft and the through hole can be connected in a transmission manner by a flat key or a spline.

[0033] The surface of the drive shaft is processed with a flat keyway or a spline groove, and the surface of the through hole is provided with a flat keyway or a spline groove. The drive shaft and the through hole can be connected for transmission by a flat key or a spline, thereby realizing reliable torque transmission between the drive shaft and the through hole and preventing relative rotation.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention can realize intelligent multi-axis collaboration and can meet the vector crimping of pipes and wires with multiple specifications and diameters.

[0036] 2. The present invention can satisfy the shrinkage and crimping effect of linear stepless adjustment within a certain range of the pipeline, which is convenient for adjustment and use.

[0037] 3. Under the action of the isostatic pressure storage tank, the present invention can achieve pressure equalization of the distributed compression head components, and the excess pressure will be released through the overflow valve, which can well protect the system and materials.

[0038] 4. The arc-shaped involute surface of the second crimping head assembly of the present invention can be set to an inner concave or outer convex structure according to process requirements, which can improve the effect of the pressing surface.

[0039] 5. The crimping head assembly and the second crimping head assembly of the present invention are internally provided with an energized coil to meet the process requirements of low temperature or hot melt pressing.

[0040] 6. The product of the present invention is easy to process, manufacture and promote, can meet the conventional crimping forming needs of pipes and wires, reduces the requirements for devices of different specifications and shapes, and improves the accuracy and efficiency of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 is a side view of the present invention;

[0043] Figure 3 is a cross-sectional view of the present invention;

[0044] Figure 4 It is a side view of the crimping head assembly of the present invention;

[0045] Figure 5 This is a schematic structural diagram of the crimping head assembly of the present invention;

[0046] Figure 6 This is a schematic diagram of the effect of the present invention on crimping regular-shaped materials;

[0047] Figure 7 This is a schematic diagram of the effect of the present invention on crimping special-shaped materials;

[0048] Figure 8 Schematic diagram of the crimping head assembly of the present invention located at positions a, b, c, and d respectively;

[0049] Figure 9 This is a schematic diagram of the effect of the present invention on the compression welding of stepped shaft materials;

[0050] Figure 10 This is a schematic diagram of the connection of the bidirectional variable hydraulic pump, filter, relief valve, pressure storage tank and hydraulic pipeline of the present invention;

[0051] Figure 11 This is a schematic structural diagram of the second crimping head assembly of the present invention;

[0052] Figure 12 Schematic diagram of the crimping effect of the second crimping head assembly of the present invention on cylindrical materials.

[0053] In the figure: 1. frame; 2. bracket; 3. first crimping head assembly; 30. base circle; 31. involute surface; 32. web; 33. through hole; 34. cambered involute surface; 35. second crimping head assembly; 4. drive shaft; 5. driver; 60. inner material I; 61. sleeve I, 62. inner material II, 63. sleeve II; 64. groove; 65. boss; 66. stepped shaft; 67. crimping belt; 7. bidirectional variable hydraulic pump; 8. filter; 9. relief valve; 10. pressure storage tank; 11. hydraulic pipeline; A. crimping channel. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0055] Example: Figures 1-12 As shown, the present invention provides a technical solution for a pipeline clamping device with a stepless adjustment function:

[0056] As a specific embodiment of the present invention, it includes a frame 1, a bracket 2, a crimping head assembly, a drive shaft 4, a driver 5, a two-way variable hydraulic pump 7, a filter 8, a relief valve 9, a pressure storage tank 10 and a hydraulic pipeline 11. The two-way variable hydraulic pump 7 transports the hydraulic oil to the pressure storage tank 10 through the filter 8 and the relief valve 9, and the hydraulic oil is output from the pressure storage tank 10 to the outside through the hydraulic pipeline 11. The hydraulic pipeline 11 is connected to the driver 5. Several brackets 2 are evenly distributed on the inner wall of the frame 1, and several drivers 5 are provided on the side of the bracket 2 away from the inner wall of the frame 1. A crimping head assembly is provided on one side of several of the drivers 5. The driver 5 provides power to the crimping head assembly. Several of the crimping head assemblies are enclosed on the side away from the bracket 2 to form a crimping channel A. The crimping head assembly includes a first crimping head assembly 3 and a second crimping head assembly 35.

[0057] As a specific embodiment of the present invention, the frame 1 is annular, and a plurality of the brackets 2 are evenly distributed around the axis of the frame 1 . An end of the bracket 2 close to the axis is provided with an axial hole.

[0058] As a specific embodiment of the present invention, a driving shaft 4 is provided on the driver 5, and the driver 5 is connected to the bracket 2. The driving shaft 4 of the driver 5 passes through the shaft hole of the bracket 2, and the driving shaft 4 is rotatably connected to the shaft hole.

[0059] The driver 5 is preferably a bidirectional variable hydraulic motor. The driver 5 and the bidirectional variable hydraulic pump 7 can both realize reliable switching between forward and reverse rotations to complete the compression and release control of material processing.

[0060] As a specific embodiment of the present invention, the first crimping head assembly 3 includes an involute surface 31 and a web 32. The web 32 is provided with a through hole 33, and the through hole 33 is rotatably connected to the drive shaft 4. A coaxial base circle 30 is provided outside the through hole 33, and an involute surface 31 is formed with the base circle 30 as the center. The involute surface 31 and the web 32 are perpendicularly connected. The plurality of first crimping head assemblies 3 can be respectively opened and closed and rotated about the center of the through hole 33 as the axis.

[0061] As a specific embodiment of the present invention, several of the drivers 5 are connected in parallel and are connected to the pressure storage tank 10 through a hydraulic pipeline 11. The pressure storage tank 10 is connected to a bidirectional variable hydraulic pump 7 and a filter 8. An overflow valve 9 is provided on the pressure storage tank 10. The drivers 5 are connected in parallel, and the interior of the pressure storage tank 10 is isostatic pressure. Each of the first pressure head assemblies 3 will obtain relatively equal pressure.

[0062] As a specific embodiment of the present invention, a plurality of the drivers 5 are connected in series, and the pressure of individual crimping heads can be adjusted according to the crimping effect requirements of the crimped materials.

[0063] As a specific embodiment of the present invention, the driver 5 is a bidirectional variable hydraulic motor.

[0064] As a specific embodiment of the present invention, flat key grooves or spline grooves are provided on the driving shaft 4 and the through hole 33, and the driving shaft 4 and the through hole 33 can be connected to each other through flat keys or splines.

[0065] As a specific embodiment of the present invention, the second crimping head assembly 35 includes a cambered involute surface 34 and a web 32. The web 32 is provided with a through hole 33, and the through hole 33 is rotatably connected to the drive shaft 4. The cambered involute surface 34 is an involute cambered surface whose diameter continuously increases from the tip to the other end face of the crimping surface of the second crimping head assembly 35. The cambered involute surface 34 can be configured as an inwardly concave or outwardly convex structure according to process requirements to improve the effect of the clamping surface. The cambered involute surface 34 and the web 32 are vertically connected. The plurality of second crimping head assemblies 35 can respectively open and close and rotate around the center of the through hole 33 as the axis.

[0066] As a specific embodiment of the present invention, the first crimping head assembly 3 and the second crimping head assembly 35 are internally provided with energized coils to meet the process requirements of low temperature or hot melt crimping.

[0067] A compression process for a pipeline compression device with a stepless adjustment function, comprising:

[0068] S1, the bidirectional variable hydraulic pump 7 pumps the hydraulic oil into the pressure storage tank 10, and then transmits it to the actuator 5 through the hydraulic pipeline 11;

[0069] S2, the driver 5 drives the first crimping head assembly 3 or the second crimping head assembly 35 to rotate;

[0070] S3, crimping the pipe or wire during the rotation of the first crimping head assembly 3 or the second crimping head assembly 35;

[0071] S4. After the crimping is completed, the first crimping head assembly 3 or the second crimping head assembly 35 is reset, and the pipe or wire is output.

[0072] As a specific embodiment of the present invention, the S2 includes the following steps: S201, the drivers 5 are connected in parallel;

[0073] The S3 includes the following steps: S301, crimping a regularly shaped pipe or wire, and each of the first crimping head assembly 3 or the second crimping head assembly 35 will receive relatively uniform pressure.

[0074] As a specific embodiment of the present invention, the S2 includes the following steps: S201, the driver 5 is connected in series;

[0075] The S3 includes the following steps: S301, crimping the special-shaped pipe or wire, each of the first crimping head assembly 3 or the second crimping head assembly 35 will adjust the pressure of the individual crimping head according to the crimping requirements of the crimped material.

[0076] Working principle of the present invention:

[0077] First, the pipe to be crimped is transported to the frame 1. The bidirectional variable hydraulic pump 7 pumps the hydraulic oil through the filter 8 into the pressure storage tank 10. The hydraulic oil is then transported to each driver 5 through the hydraulic pipeline 11. The driver 5 drives the first crimping head assembly 3 to rotate forward and reverse via the drive shaft 4 to achieve the compression and release of the material.

[0078] The driver 5 drives the first crimping head assembly 3 or the second crimping head assembly 35, and the first crimping head assembly 3 or the second crimping head assembly 35 rotates to form a designated crimping channel A, and then the pipe is transported to the crimping channel A for crimping, and the crimped pipe is output from the crimping channel A.

[0079] Several brackets 2 are provided inside the frame 1, and the brackets 2 are evenly arranged around the frame 1. The shaft hole in the bracket 2 can be used to place the drive shaft 4, and the drive shaft 4 is connected to the first crimping head assembly 3, so the bracket 2 provides a stable structural support for the placement of the driver 5.

[0080] The bracket 2 is connected to the driver 5, providing a fixed support function for the driver 5. The axial hole of the bracket 2 is rotatably connected to the drive shaft 4, serving as the rotation support point of the drive shaft 4, providing stable support and rotational guidance for the placement of the first crimping head assembly 3 or the second crimping head assembly 35.

[0081] When the driver 5 moves, the driving shaft 4 drives the through hole 33 to rotate, thereby driving the first crimping head assembly 3 or the second crimping head assembly 35 to rotate. Since the cross-section of the involute surface 31 is triangular or fan-shaped, several first crimping head assemblies 3 or second crimping head assemblies 35 can be opened and contracted and compressed under the drive of the driver 5. Several first crimping head assemblies 3 or second crimping head assemblies 35 are enclosed to form a crimping channel A, and the pipe or wire is crimped in the crimping channel A.

[0082] Example 1:

[0083] like Figure 6 As shown, when crimping regular materials, the driver 5 rotates synchronously, so that the driver 5 drives several first crimping head assemblies 3 to rotate synchronously. During the rotation process, the first crimping head assemblies 3 contact the surface of the pipe at the same time, so that each first crimping head assembly 3 is evenly pressed on the surface of the sleeve I61, thereby completing the crimping process of the sleeve I61 and the inner material I60.

[0084] Example 2:

[0085] like Figure 7 As shown, when crimping special-shaped pipes, each driver 5 drives the first crimping head assembly 3 to rotate, so that the rotation angle of each first crimping head assembly 3 is different, and then when the first crimping head assembly 3 contacts the sleeve II63, different first crimping head assemblies 3 have different crimping areas on the sleeve II63, so that a deeper or shallower crimping surface will appear on the surface of the sleeve II63, thereby completing the crimping of the special-shaped material.

[0086] When the groove 64 is required to be crimped, the first crimping head assembly 3 rotates toward the side close to the crimping channel A, and the angle of rotation of the two adjacent first crimping head assemblies 3 of the first crimping head assembly 3 is smaller than that of the first crimping head assembly 3; when the boss 65 is required to be crimped, the first crimping head assembly 3 rotates toward the side close to the crimping channel A, and the angle of rotation of the two adjacent first crimping head assemblies 3 of the first crimping head assembly 3 is larger than that of the first crimping head assembly 3;

[0087] Example 3:

[0088] like Figure 8 As shown, when pipes or wires of different diameters need to be crimped, the driver 5 drives the first crimping head assembly 3 to rotate so that the end of the first crimping head assembly 3 away from the bracket 2 is located at positions a, b, c, and d, respectively, so that pipes or wires of different diameters can be crimped;

[0089] Example 4:

[0090] like Figure 9As shown, when the stepped shaft 66 needs to be crimped (different diameters need to be crimped on one shaft), the rotation angle of the first crimping head assembly 3 is adjusted multiple times so that the end of the first crimping head assembly 3 away from the bracket 2 is rotated to a, b, c, and d respectively, so that the crimping channel A crimps the stepped shaft 66 in batches and steps, so that the outer wall of the stepped shaft 66 forms annular crimping bands of different diameters.

[0091] The driver 5 drives the first crimping head assembly 3 to move, and the driver 5 is driven by a bidirectional variable hydraulic pump 7. The driver 5 needs to be a system that can rotate forward and reverse, preferably a bidirectional variable hydraulic motor, so that the driver 5 can complete forward and reverse rotation, driving the first crimping head assembly 3 to rotate, forming crimping channels A of different sizes. When the first crimping head assembly 3 rotates forward, the diameter of the crimping channel A becomes larger, and when the first crimping head assembly 3 rotates reversely, the diameter of the crimping channel A becomes smaller.

[0092] Embodiment 5:

[0093] like Figure 11 、 12 As shown, the second crimping head assembly 35 includes a cambered involute surface 34 and a web 32. The web 32 is provided with a through hole 33, which is rotatably connected to the drive shaft 4. The cambered involute surface 34 is an involute cambered surface whose diameter increases continuously from the tip to the other end of the crimping surface of the second crimping head assembly 35. The cambered involute surface 34 can be configured as a concave or convex structure according to process requirements to improve the surface compression effect. The cambered involute surface 34 and the web 32 are vertically connected. Several second crimping head assemblies 35 can be opened and closed and rotated about the center of the through hole 33. When the cambered involute surface 34 adopts a concave structure, the surfaces of the sleeve 161 and the inner material 160 can be compressed and relatively rounded.

[0094] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A pipeline compression process with stepless adjustment function, characterized in that: The compacting process includes the following specific steps: S1, a bidirectional variable hydraulic pump (7) pumps the hydraulic oil into a pressure storage tank (10), and then transmits it to the actuator (5) through a hydraulic pipeline (11); S2, the driver (5) drives the first crimping head assembly (3) or the second crimping head assembly (35) to rotate; S3, crimping the pipe or wire during the rotation of the first crimping head assembly (3) or the second crimping head assembly (35); S4. After the crimping is completed, the first crimping head assembly (3) or the second crimping head assembly (35) is reset, and the pipe or wire is output.

2. The pipeline compression process with stepless adjustment function according to claim 1, characterized in that: Said S2 comprises the following steps: S201, the drivers (5) are connected in parallel; The S3 comprises the following steps: S301, crimping a regularly shaped pipe or wire, so that each of the first crimping head assembly (3) or the second crimping head assembly (35) receives relatively uniform pressure.

3. The pipeline compression process with stepless adjustment function according to claim 1, characterized in that: Said S2 comprises the following steps: S201, the driver (5) is connected in series; The S3 comprises the following steps: S301, crimping the special-shaped pipe or wire, each of the first crimping head assembly (3) or the second crimping head assembly (35) adjusts the pressure of the individual crimping head according to the crimping requirements of the crimped material.

4. A compression device for a pipeline compression process with a stepless adjustment function as claimed in any one of claims 1 to 3, characterized in that: The invention comprises a frame (1), a bracket (2), a press head assembly, a drive shaft (4), a driver (5), a bidirectional variable hydraulic pump (7), a filter (8), a relief valve (9), a pressure storage tank (10) and a hydraulic pipeline (11); the bidirectional variable hydraulic pump (7) delivers hydraulic oil to the pressure storage tank (10) through the filter (8) and the relief valve (9); the hydraulic oil is output from the pressure storage tank (10) through the hydraulic pipeline (11); the hydraulic pipeline (11) is connected to the driver (5); and the inner wall of the frame (1) is provided with A plurality of brackets (2) are provided, and a plurality of drivers (5) are provided on a side of the brackets (2) away from the inner wall of the frame (1). A crimping head assembly is provided on one side of the plurality of drivers (5). The drivers (5) provide power to the crimping head assembly. The plurality of crimping head assemblies are enclosed on a side away from the brackets (2) to form a crimping channel A. The crimping head assembly comprises a first crimping head assembly (3) and a second crimping head assembly (35); and the first crimping head assembly (3) and the second crimping head assembly (35) are provided with energized coils inside.

5. The pipeline pressing device with stepless adjustment function according to claim 4, characterized in that: The frame (1) is annular, and a plurality of brackets (2) are evenly distributed around the axis of the frame (1). An end of the bracket (2) close to the axis is provided with an axial hole.

6. The pipeline pressing device with stepless adjustment function according to claim 5, characterized in that: The driver (5) is provided with a drive shaft (4), the driver (5) is connected to the bracket (2), the drive shaft (4) of the driver (5) passes through the shaft hole of the bracket (2), the drive shaft (4) is rotatably connected to the shaft hole, and the driver (5) is a bidirectional variable hydraulic motor.

7. The pipeline pressing device with stepless adjustment function according to claim 6, characterized in that: The first pressing joint assembly (3) includes an involute surface (31) and a web (32), wherein the web (32) is provided with a through hole (33), and the through hole (33) is rotatably connected to the drive shaft (4). A coaxial base circle (30) is provided on the outside of the through hole (33), and a section of involute surface (31) is formed with the base circle (30) as the center. The involute surface (31) and the web (32) are vertically connected. Several first pressing joint assemblies (3) can be respectively opened and closed and rotated with the center of the through hole (33) as the axis. The drive shaft (4) and the through hole (33) are provided with a flat keyway or a spline groove, and the drive shaft (4) and the through hole (33) can be connected to each other by a flat key or a spline.

8. The pipeline pressing device with stepless adjustment function according to claim 7, characterized in that: Several of the drivers (5) are connected in parallel or in series, and are connected to a pressure storage tank (10) through a hydraulic pipeline (11). The pressure storage tank (10) is connected to a bidirectional variable hydraulic pump (7) and a filter (8). An overflow valve (9) is provided on the pressure storage tank (10). The drivers (5) are connected in parallel, and the interior of the pressure storage tank (10) is isostatically pressurized. Each of the first crimping joint components (3) will obtain a relatively equal pressure. Several of the drivers (5) are connected in series, and the pressure of individual crimping joints can be adjusted according to the crimping requirements of the crimped materials.

9. The pipeline pressing device with stepless adjustment function according to claim 8, characterized in that: The second crimping head assembly (35) includes a cambered involute surface (34) and a web (32), wherein a through hole (33) is provided on the web (32), and the through hole (33) is rotatably connected to the drive shaft (4); the cambered involute surface (34) is an involute cambered surface whose diameter increases continuously from the tip of the crimping surface to the other end face of the second crimping head assembly (35), and the cambered involute surface (34) can be set as an inward concave or outward convex structure according to process requirements, and the cambered involute surface (34) and the web (32) are vertically connected, and a plurality of the second crimping head assemblies (35) can be respectively opened and closed and rotated with the center of the through hole (33) as the axis.

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