Production process of high-frequency thick-wall straight-seam stainless steel welded pipe

Abstract

The invention discloses a production technology of a high-frequency thick-wall straight-seam stainless steel welded pipe. The production technology comprises the steps that S1, a steel coil is uncoiled and sheared, and a stainless steel welded pipe base body is formed; s2, the stainless steel welded pipe base body is cut and subjected to butt welding, and a stainless steel welded pipe is formed; s3, the end of the stainless steel welded pipe is subjected to heat treatment; s4, the heat-treated part of the stainless steel welded pipe is put into an expanding device for primary expanding, after primary expanding, the expanding device or the stainless steel welded pipe is rotated, and the non-expanded part of the port of the stainless steel welded pipe is subjected to secondary expanding; s5, the stainless steel welded pipe is subjected to flushing and ultrasonic flaw detection; the problem that after a traditional welded pipe expanding device finishes expanding of the welded pipe, part of the interior of the stainless steel welded pipe cannot be subjected to accurate expanding, and therefore the expanding precision and the connecting strength of the stainless steel welded pipe are affected can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel welded pipes, and in particular to a production process of a high-frequency thick-wall straight-seam stainless steel welded pipe. Background Art

[0002] During the installation and docking of multiple stainless steel welded pipes, the pipe end diameter and roundness value are required to meet the installation requirements. The traditional method of expanding the end of stainless steel welded pipes is only one-time expansion, that is, after heating the end of the stainless steel welded pipe, the expansion device is used to expand the pipe once. However, the expansion structure of the expansion device cannot form a complete cylindrical arc surface structure after opening, which results in that some parts of the stainless steel welded pipe cannot be accurately expanded, and the stress on the end of the stainless steel welded pipe is different, which affects the expansion accuracy and connection strength of the stainless steel welded pipe. Summary of the invention

[0003] In order to overcome the above disadvantages, the purpose of the present invention is to provide a production process for high-frequency thick-wall straight seam stainless steel welded pipe.

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention includes:

[0005] S1: Uncoiling and shearing the steel coil to form the stainless steel welded pipe matrix;

[0006] S2: The stainless steel welded pipe substrate is cut and butt-welded to form a stainless steel welded pipe;

[0007] S3: The ends of the stainless steel welded pipe are heat treated;

[0008] S4: placing the heat-treated part of the stainless steel welded pipe into an expansion device for primary expansion. After the primary expansion, rotating the expansion device or the stainless steel welded pipe to perform secondary expansion on the unexpanded part of the stainless steel welded pipe end;

[0009] S5: Flushing and ultrasonic flaw detection of stainless steel welded pipes.

[0010] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, a diameter expansion device for S4 is also included, and the diameter expansion device includes:

[0011] A base frame, wherein a rotatable cylinder is horizontally arranged on the base frame, wherein a first rotating shaft and at least four groups of diameter-expanding structures installed on the first rotating shaft are installed in the cylinder, and when the first rotating shaft is rotated, each group of the diameter-expanding structures synchronously extends out or retracts through the side surface of the cylinder;

[0012] a second rotating shaft, the second rotating shaft being disposed on the base frame, the second rotating shaft being connected to a driving device, and the second rotating shaft being not connected to the first rotating shaft;

[0013] a clutch assembly, disposed on the base frame and the second rotating shaft, the clutch assembly rotates synchronously with the second rotating shaft and can selectively connect the first rotating shaft with the second rotating shaft;

[0014] An elastic energy storage component is arranged on the cylinder and the first rotating shaft. When the diameter expansion structure extends out of the side of the cylinder, the elastic energy storage component stores energy. When the diameter expansion structure retracts and the clutch assembly does not work, the elastic energy storage component releases energy to control the rotation of the cylinder and change the position of the diameter expansion structure in the stainless steel welded pipe.

[0015] In the preferred technical scheme of the production process of the above-mentioned high-frequency thick-walled straight seam stainless steel welded pipe, the expansion structure includes a limiting groove opened on the cylinder, an expansion abutment located in the limiting groove, and a transmission rod for connecting the expansion abutment and the first rotating shaft, wherein the two ends of the transmission rod are respectively rotatably mounted on the bottom surface of the expansion abutment and the first rotating shaft.

[0016] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, the clutch assembly includes:

[0017] A sleeve, which is movably disposed on the second rotating shaft, and the sleeve is provided with a friction plate on a side facing the elastic energy storage member;

[0018] A driving cylinder is arranged on the base frame, and the extended shaft end of the driving cylinder is connected to the sleeve through a plane bearing.

[0019] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, the sleeve forms an opening on the side facing the elastic energy storage member, the friction plate is located in the opening, and the friction plate is connected to the sleeve via an elastic member.

[0020] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, the first rotating shaft forms a friction force expansion portion at one end facing the second rotating shaft.

[0021] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, the elastic energy storage member has an inner end and an outer end, the inner end is mounted on the first rotating shaft, and the outer end is mounted on the side wall of the cylinder.

[0022] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, the elastic energy storage member is a coil spring or elastic steel.

[0023] In the preferred technical solution of the production process of the high-frequency thick-walled straight seam stainless steel welded pipe, the elastic member is a spring or elastic steel.

[0024] In the preferred technical solution of the production process of the high-frequency thick-walled straight-seam stainless steel welded pipe, the cylinder is rotatably mounted on the base frame through a shell cover, and the elastic energy storage member and the clutch assembly are located inside the shell cover.

[0025] The beneficial effects of the present invention are:

[0026] (1) The present invention performs a diameter expansion once after heat treatment on the end of the stainless steel welded pipe. After the first diameter expansion is completed, the cylinder is driven to rotate by the elastic energy storage member, and then the diameter expansion abutment member is rotated relative to the inner wall of the end of the stainless steel welded pipe. The second diameter expansion is performed again by the diameter expansion device, thereby compensating for the part of the welded pipe that has not been expanded by the first diameter expansion, thereby effectively improving the diameter expansion accuracy of the stainless steel welded pipe of the present invention and increasing the service life of the stainless steel welded pipe.

[0027] (2) The elastic potential energy stored in the elastic energy storage member is released to automatically rotate the cylinder, thereby realizing the position change of the diameter expansion abutment member in the stainless steel welded pipe, so that the present application can comprehensively expand the diameter of the stainless steel welded pipe port, improve the diameter expansion accuracy of the stainless steel welded pipe, improve the connection strength between each stainless steel welded pipe, and then improve the service life of the assembled stainless steel welded pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the connection between the diameter expansion device and the conveying equipment;

[0029] Figure 2 is a three-dimensional schematic diagram of the diameter expansion device;

[0030] Figure 3 is a front view of the expansion device;

[0031] Figure 4 is a first schematic diagram of the diameter expansion structure;

[0032] Figure 5 is a second schematic diagram of the diameter expansion structure;

[0033] Figure 6 is a cross-sectional view of the expansion structure and the clutch assembly;

[0034] Figure 7 for Figure 6 A partial schematic diagram of the

[0035] Figure 8 It is a flow chart of the production process of the present invention;

[0036] In the figure: stainless steel welded pipe 1, base frame 2, cylinder 3, first rotating shaft 4, friction force expansion part 41, second rotating shaft 5, elastic energy storage member 6, inner end 61, outer end 62, gear box 7, limit groove 81, diameter expansion abutment member 82, transmission rod 83, sleeve 91, friction plate 92, drive cylinder 93, plane bearing 94, elastic member 95, high-pressure air hole 10, upper conveying chain 11, lower conveying chain 12, lifting cylinder 13, shell cover 14. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0038] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 8 The production process of the high-frequency thick-walled straight seam stainless steel welded pipe 1 of the present invention comprises: S1: uncoiling and shearing the steel coil to form the stainless steel welded pipe 1 matrix; S2: cutting and butt welding the stainless steel welded pipe 1 matrix to form the stainless steel welded pipe 1; S3: heat treating the end of the stainless steel welded pipe 1; S4: placing the heat-treated part of the stainless steel welded pipe 1 into an expanding device for primary expansion, and after the primary expansion, rotating the expanding device or the stainless steel welded pipe 1 to perform secondary expansion on the unexpanded part of the end of the stainless steel welded pipe 1; S5: flushing and ultrasonic flaw detection of the stainless steel welded pipe 1.

[0041] In addition, see Figures 1 to 7 The present invention also provides a diameter expansion device, which is used in the above step S4 to achieve secondary diameter expansion of the unexpanded portion of the stainless steel welded pipe 1 to improve the diameter expansion accuracy and connection strength of the stainless steel welded pipe 1.

[0042] See also Figure 1 , Figure 6 In one or more embodiments, the diameter expansion device includes a base frame 2, a cylinder 3, a first rotating shaft 4, an expansion structure, a second rotating shaft 5, a clutch assembly and an elastic energy storage member 6.

[0043] Among them, the cylinder 3 is rotatably installed on the base frame 2 through the shell cover 14, and the elastic energy storage component 6 and the clutch assembly are located in the space limited by the shell cover 14; the first rotating shaft 4 is coaxial with the cylinder 3, and a limiting groove 81 is penetrated through the outer circumference of the cylinder 3. The diameter expansion structure is located on the limiting groove 81 and the first rotating shaft 4. The diameter expansion structure has at least four groups. Four, six, eight or ten groups of diameter expansion structures can form a columnar structure to match the inner wall of the stainless steel welded pipe 1. By rotating the first rotating shaft 4, the diameter expansion structure is controlled to extend and abut against the inner wall of the stainless steel welded pipe 1, thereby forming an expansion of the port of the stainless steel welded pipe 1.

[0044] See also Figure 2 , Figure 3 , Figure 6 The second rotating shaft 5 is rotatably mounted on the base frame 2. The second rotating shaft 5 is coaxial with the first rotating shaft 4. The end of the second rotating shaft 5 does not contact the end of the first rotating shaft 4. The second rotating shaft 5 is connected to the servo motor through the gear box 7. Through this arrangement, a larger torque can be provided to the second rotating shaft 5 to meet the torque when the expansion structure is opened.

[0045] See also Figure 6 The clutch assembly is configured on the base frame 2 and the second rotating shaft 5. The clutch assembly rotates synchronously with the second rotating shaft 5. The clutch assembly can selectively connect the first rotating shaft 4 and the second rotating shaft 5, thereby realizing the synchronous rotation of the first rotating shaft 4 with the second rotating shaft 5, or realize the separation of the first rotating shaft 4 and the second rotating shaft 5, thereby realizing the idling of the second rotating shaft 5.

[0046] See also Figure 5 , Figure 6 , Figure 7, the elastic energy storage member 6 is arranged on the cylinder 3 and the first rotating shaft 4. When the clutch assembly drives the first rotating shaft 4 to connect with the second rotating shaft 5, and the first rotating shaft 4 rotates to drive the diameter expansion structure to extend out of the side of the cylinder 3, the elastic energy storage member 6 begins to store energy; when the first rotating shaft 4 is reversed or the first rotating shaft 4 is disconnected from the second rotating shaft 5, the elastic energy storage member 6 begins to release the stored elastic potential energy, and the elastic potential energy can control the cylinder 3 to rotate relative to the base frame 2, so that the position of each diameter expansion structure in the stainless steel welded pipe 1 can be shifted to the unexpanded part in the port of the stainless steel welded pipe 1, and then repeat the above-mentioned steps of expanding the port of the welded pipe. Through this arrangement, the present application can comprehensively expand the port of the stainless steel welded pipe 1, improve the diameter expansion accuracy of the present application for the stainless steel welded pipe 1, improve the connection strength between each stainless steel welded pipe 1, and then improve the service life of the assembled stainless steel welded pipe 1.

[0047] In one or more embodiments, the expansion structure includes a limiting groove 81 opened on the cylinder 3, an expansion abutment 82 located in the limiting groove 81, and a transmission rod 83 for connecting the expansion abutment 82 and the first rotating shaft 4, wherein the two ends of the transmission rod 83 are respectively rotatably mounted on the bottom surface of the expansion abutment 82 and the first rotating shaft 4.

[0048] See also Figures 2 to 4 When the end of the stainless steel welded pipe 1 is expanded, the first rotating shaft 4 is controlled to rotate, and the first rotating shaft 4 drives the multiple transmission rods 83 to rotate synchronously, so that the multiple expansion abutment members 82 are synchronously extended out of the side of the cylinder 3 under the action of the limiting groove 81, thereby realizing the synchronous expansion of the end of the stainless steel welded pipe 1; it has the characteristics of simple operation and stable structure.

[0049] In one or more embodiments, the clutch assembly includes: a sleeve 91, which is movably configured on the second rotating shaft 5, and the sleeve 91 is provided with a friction plate 92 on the side facing the elastic energy storage component 6; a driving cylinder 93, which is configured on the base frame 2, and the extended shaft end of the driving cylinder 93 is connected to the sleeve 91 through a plane bearing 94; the sleeve 91 forms an opening on the side facing the elastic energy storage component 6, and the friction plate 92 is located in the opening, and the friction plate 92 is connected to the sleeve 91 through an elastic component 95.

[0050] See also Figure 6 , Figure 7 In the initial state, the friction plate 92 is not in contact with the axial end of the first rotating shaft 4.

[0051] When it is necessary to control the first rotating shaft 4 to rotate to drive the expanding diameter abutment 82 to extend out of the side of the cylinder 3, first control the extending shaft end of the driving cylinder 93 to extend to push the sleeve 91, the friction plate 92 and the elastic member 95 toward the first rotating shaft 4. When the friction plate 92 abuts against the shaft end of the first rotating shaft 4 and the elastic member 95 is in a compressed state, stop driving the cylinder 93, and then control the servo motor to work. The servo motor controls the second rotating shaft 5 to rotate through the gear box 7. The second rotating shaft 5 drives the sleeve 91 and the friction plate 92 to rotate synchronously. Then, under the action of the friction force between the shaft end of the first rotating shaft 4 and the friction plate 92, the first rotating shaft 4 rotates, so that the expanding diameter abutment 82 extends out of the side of the cylinder 3, and the elastic energy storage member 6 can store elastic potential energy.

[0052] After the first diameter expansion of the port of the stainless steel welded pipe 1 is completed, the extended shaft end of the driving cylinder 93 is controlled to retract so that the friction plate 92 is separated from the shaft end of the first rotating shaft 4. At this time, the elastic energy storage component 6 begins to release elastic potential energy, and the diameter expansion abutment component 82 retracts relative to the cylinder 3 under the action of the elastic energy storage component 6, so that the diameter expansion abutment component 82 is separated from the inner wall of the port of the stainless steel welded pipe 1. At the same time, the elastic energy storage component 6 drives the cylinder 3 to rotate through the first rotating shaft 4 and the diameter expansion abutment component 82, and the cylinder 3 rotates on the base frame 2 through the shell cover 14, so that the position of the diameter expansion abutment component 82 on the surface of the cylinder 3 is changed; thereafter, the clutch assembly is controlled to work so that the first rotating shaft 4 rotates again to realize the secondary diameter expansion of the diameter expansion abutment component 82. It has the characteristics of simple operation and high degree of automation, and is practical.

[0053] In one or more embodiments, the first rotating shaft 4 forms a friction force expansion portion 41 at one end thereof facing the second rotating shaft 5. Figure 7 The friction force enlarging portion 41 can increase the friction force between the first rotating shaft 4 and the friction plate 92 , thereby ensuring the rotation effect of the first rotating shaft 4 .

[0054] In one or more embodiments, the elastic energy storage member 6 has an inner end 61 and an outer end 62, the inner end 61 is mounted on the first rotating shaft 4, and the outer end 62 is mounted on the side wall of the cylinder 3; the elastic energy storage member 6 is a coil spring or elastic steel.

[0055] See also Figure 5 , Figure 7 The elastic energy storage member 6 is a coil spring having an inner end 61 and an outer end 62. The inner end 61 is mounted on the first rotating shaft 4, and the outer end 62 is mounted on the side wall of the cylinder 3. When the elastic potential energy is stored, the coil spring rolls, and when the elastic potential energy is released, the coil spring is in a relaxed state.

[0056] In one or more embodiments, the elastic member 95 is a spring or elastic steel.

[0057] In other possible embodiments, the cylinder 3 is provided with a high-pressure air hole 10 at one end away from the base and at the side of the expansion abutment 82, and the high-pressure air hole 10 is connected to an external high-pressure air source through a high-pressure conduit. Through this arrangement, when the cylinder 3 enters the port of the stainless steel welded pipe 1, the high-pressure air flow blown out through the high-pressure air hole 10 can remove impurities in the stainless steel welded pipe 1, effectively reducing the damage to the stainless steel welded pipe 1 during the expansion, and improving the expansion quality of the port of the stainless steel welded pipe 1.

[0058] In addition, see Figure 1 The present invention also provides a conveying device for conveying a stainless steel welded pipe 1 to a diameter expansion device. The conveying device includes a frame and an upper conveying chain 11 and a lower conveying chain 12 installed on the frame. A "concave" structure for accommodating the welded pipe is formed between the upper conveying chain 11 and the lower conveying chain 12. Through this arrangement, an effective limit for the stainless steel welded pipe 1 can be formed. In other possible embodiments, a lifting structure is also installed on the frame, and the lifting structure can adjust the height of the upper conveying chain 11 and the lower conveying chain 12. The lifting structure is a lifting cylinder 13, and the extended shaft end of the lifting cylinder 13 is installed on the upper conveying chain 11 and the lower conveying chain 12.

[0059] The present invention performs primary and secondary diameter expansion on one end of a stainless steel welded pipe:

[0060] After the end of the stainless steel welded pipe 1 is heated by the electromagnetic coil, the end of the stainless steel welded pipe 1 is conveyed to the diameter expansion device through the conveying equipment so that the cylinder 3 and the diameter expansion abutment 82 can be located in the end of the stainless steel welded pipe 1; then, the servo motor is controlled to work, and the servo motor drives the second rotating shaft 5 to rotate through the gear box 7. At the same time, the extended shaft end of the driving cylinder 93 is controlled to extend to push the sleeve 91, the friction plate 92 and the elastic member 95 toward the first rotating shaft 4. When the friction plate 92 abuts against the friction force expansion portion 41 of the first rotating shaft 4 and the elastic member 95 is in a compressed state, the first rotating shaft 4 rotates, and the plurality of diameter expansion abutment members 82 are synchronously extended from the side of the cylinder 3 under the action of the limiting groove 81 and the transmission rod 83, so that the diameter expansion abutment member 82 is pressed against the diameter of the stainless steel welded pipe port 1. When the first rotating shaft 4 rotates, the elastic energy storage member 6 is driven by the first rotating shaft 4 to roll inward, and the elastic energy storage member 6 stores elastic potential energy to complete a diameter expansion.

[0061] After the first diameter expansion is completed, when the second diameter expansion is required, the servo motor is controlled to reverse to realize the reversal of the second rotating shaft 5, and the second rotating shaft 5 synchronously drives the first rotating shaft 4 to reverse, so that the diameter expansion abutment 82 partially retreats into the limiting groove 81, and the diameter expansion abutment 82 is separated from the inner wall of the port of the stainless steel welded pipe 1. It should be noted that at this time, the elastic energy storage member 6 will have a partial loss of elastic potential energy, but it does not affect the remaining elastic potential energy stored in the elastic energy storage member 6 to drive the cylinder 3 to rotate relative to the base frame. When the diameter expansion abutment 82 partially retreats into the limiting groove, the control The extended shaft end of the driving cylinder 93 retracts to separate the friction plate 92 from the shaft end of the first rotating shaft 4. At this time, the elastic energy storage component 6 begins to release elastic potential energy, and the diameter-expanding abutment component 82 retracts relative to the cylinder 3 under the action of the elastic energy storage component 6. At the same time, the elastic energy storage component 6 drives the cylinder 3 to rotate through the first rotating shaft 4 and the diameter-expanding abutment component 82. The cylinder 3 rotates on the base frame 2 through the shell cover 14, thereby realizing the change of the position of the diameter-expanding abutment component 82 on the surface of the cylinder 3. After that, the above-mentioned diameter expansion workflow is repeated, which has the characteristics of simple operation and high degree of automation.

[0062] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A production process for high-frequency thick-walled straight seam stainless steel welded pipe, characterized in that: include: S1: Uncoiling and shearing the steel coil to form the stainless steel welded pipe matrix; S2: The stainless steel welded pipe substrate is cut and butt-welded to form a stainless steel welded pipe; S3: The ends of the stainless steel welded pipe are heat treated; S4: placing the heat-treated portion of the stainless steel welded pipe into an expansion device for primary expansion. After the primary expansion, rotating the expansion device or the stainless steel welded pipe to perform a secondary expansion on the unexpanded portion of the stainless steel welded pipe end; S5: Flushing and ultrasonic flaw detection of stainless steel welded pipes.

2. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 1 is characterized in that: Also included is a diameter expansion device for S4, the diameter expansion device comprising: A base frame, wherein a rotatable cylinder is horizontally arranged on the base frame, a first rotating shaft and at least four groups of diameter-expanding structures mounted on the first rotating shaft are installed in the cylinder, and when the first rotating shaft is rotated, each group of the diameter-expanding structures synchronously extends or retracts through the side surface of the cylinder; a second rotating shaft, the second rotating shaft being disposed on the base frame, the second rotating shaft being connected to the driving device, and the second rotating shaft being not connected to the first rotating shaft; a clutch assembly, disposed on the base frame and the second rotating shaft, the clutch assembly rotating synchronously with the second rotating shaft and selectively connecting the first rotating shaft with the second rotating shaft; An elastic energy storage member is disposed on the cylinder and the first rotating shaft. When the diameter expansion structure extends out of the side of the cylinder, the elastic energy storage member stores energy. When the diameter expansion structure retracts and the clutch assembly is not working, the elastic energy storage member releases energy to control the rotation of the cylinder and change the position of the diameter expansion structure in the stainless steel welded pipe.

3. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 2 is characterized in that: The expansion structure includes a limiting groove opened on the cylinder, an expansion abutment located in the limiting groove, and a transmission rod for connecting the expansion abutment and the first rotating shaft, wherein the two ends of the transmission rod are respectively rotatably mounted on the bottom surface of the expansion abutment and the first rotating shaft.

4. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 2, characterized in that: The clutch assembly comprises: a sleeve movably disposed on the second rotating shaft, wherein the sleeve is provided with a friction plate on a side facing the elastic energy storage member; A driving cylinder is arranged on the base frame, and the extended shaft end of the driving cylinder is connected to the sleeve through a plane bearing.

5. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 4 is characterized in that: The sleeve forms an opening on a side facing the elastic energy storage component. The friction plate is located in the opening. The friction plate is connected to the sleeve via an elastic component.

6. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 4, characterized in that: A friction force enlarging portion is formed at one end of the first rotating shaft facing the second rotating shaft.

7. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 2, characterized in that: The elastic energy storage member has an inner end and an outer end, the inner end is mounted on the first rotating shaft, and the outer end is mounted on the side wall of the cylinder.

8. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 7, characterized in that: The elastic energy storage member is a coil spring or elastic steel.

9. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 5, characterized in that: The elastic member is a spring or elastic steel.

10. The production process of high-frequency thick-walled straight seam stainless steel welded pipe according to claim 2, characterized in that: The cylinder is rotatably mounted on the base frame through a shell cover, and the elastic energy storage component and the clutch assembly are located in the shell cover.

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