Auxiliary structure for welding processing of drying cylinder

Abstract

The invention provides an auxiliary structure for welding processing of a drying cylinder, and relates to the technical field of welding equipment.The auxiliary structure comprises an auxiliary assembly, the auxiliary assembly is composed of a driving mechanism, an adapting mechanism and a welding mechanism, the adapting mechanism has the capacity of profiling operation and can drive the welding mechanism to conduct fitting type welding processing along the curved surface appearance of a cylinder body, and the welding mechanism is used for welding the cylinder body; the welding distance between the welding mechanism and the barrel body is always accurate and consistent, the welding machining quality is effectively guaranteed, the adaptation mechanism can automatically adapt to the welding assembly function of barrel bodies with different outer diameters, use is flexible and convenient, the included angle between a welding gun and the barrel body can be freely adjusted and controlled during welding, and the welding efficiency is improved. The device can meet the requirements of welding machining technologies of different specifications, and solves the problems that the textile drying cylinder is not provided with a profiling adaptive structure at the welding operation position, the distance between a welding gun and a cylinder body is difficult to accurately control in the welding process, the welding penetration depth is not uniform, and the welding seam forming consistency is poor.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an auxiliary structure for welding cylinder processing. Background Technology

[0002] Textile drying cylinders are core components used in the textile printing and dyeing industry for drying fabrics. They are typically composed of metal parts such as the cylinder body and end caps. They need to have good sealing and structural strength to adapt to the high temperature and high pressure environment in drying operations. Since the overall structure is a closed cylinder, the metal parts cannot be manufactured as a single piece. Therefore, during the manufacturing process, multiple sections of the cylinder body need to be connected by welding to form a complete and sealed drying cylinder structure. This ensures that it can withstand the drying load for a long time and meet the process requirements for fabric drying.

[0003] When using existing welding equipment for textile drying cylinders, there is no conformal fitting structure at the welding operation point. Due to the large outer diameter of the drying cylinder and the curved structure of the cylinder body, it is difficult to accurately control the distance between the welding torch and the cylinder body during the welding process. This can easily lead to uneven weld penetration and poor weld formation consistency, affecting the sealing performance and structural strength of the welding part of the drying cylinder. In addition, the welding operation often requires operators to climb to a height, which poses a high risk, poor safety and flexibility, and low practicality. Summary of the Invention

[0004] This invention relates to an auxiliary structure for welding drying cylinders. The auxiliary structure includes auxiliary components that enable welding assembly between drying cylinder bodies. An adapting mechanism has contour-following capabilities, allowing the welding mechanism to perform conformal welding along the curved surface of the cylinder body. This ensures a consistently precise welding distance between the welding mechanism and the cylinder body, effectively guaranteeing welding quality. The adapting mechanism can automatically adapt to welding assembly of cylinders with different outer diameters, offering flexibility and convenience. The angle between the welding torch and the cylinder body during welding is freely adjustable, adapting to different welding process requirements. Furthermore, the auxiliary components ensure the welding area remains below the cylinder body during welding, facilitating precise control of the welding process and operational status by the operator. The entire process eliminates the need for climbing, significantly improving operational convenience and demonstrating exceptional flexibility, adaptability, safety, and practicality.

[0005] This invention provides an auxiliary structure for welding drying cylinders, specifically including: a placement component and an auxiliary component. The placement component includes a docking seat and a clamping mechanism. Two drying cylinders to be welded and assembled are placed on the top of the docking seat, and the drying cylinders are fixed and positioned by the clamping mechanism. The placement component also includes a track plate, which is fixedly installed in the middle of the docking seat. The auxiliary component consists of a driving mechanism, an adapting mechanism, and a welding mechanism. The driving mechanism includes a drive motor and a slider seat. The drive motor is fixedly mounted on the side of the slider seat, and the slider seat is inserted into the top of the track plate. The adaptation mechanism also includes a connecting seat, a pressure frame, a contact frame, and a reset frame. The connecting seat is fixedly mounted on the side of the slider seat, and the pressure frame is inserted into the inside of the connecting seat. The contact frame is rotatably connected to the side of the pressure frame, and the reset frame is inserted into the inside of the connecting seat and the pressure frame. The welding mechanism includes a positioning seat and a welding torch holder. The positioning seat is inserted into the side of the contact frame, and the welding torch holder is rotatably connected to the side of the positioning seat. A welding torch is detachably and fixedly installed inside the welding torch holder.

[0006] Furthermore, the top of the track plate is provided with a semi-circular arc-shaped notch, and the top of the arc-shaped notch is provided with a movable rack. The drive motor shaft is provided with a drive gear, and the drive gear and the movable rack mesh with each other for transmission.

[0007] Furthermore, one end of the reset frame is provided with a pull baffle, which abuts against the side of the pressure frame and is located on the side of the pressure frame close to the contact frame. The other end of the reset frame is provided with a retractable rod, and the inside of the track plate is provided with a control groove, and the retractable rod is inserted into the inside of the control groove.

[0008] Furthermore, the control groove is composed of an arc-shaped holding groove and an arc-shaped pulling groove, and the bottom end of the pulling groove is connected to the top end of one end of the holding groove. The center of the holding groove and the center of the semi-circular arc-shaped notch at the top of the track plate are at the same position, and the axis of the assembly drying cylinder to be welded is on the vertical line of the center of the holding groove.

[0009] Furthermore, the pressure frame is provided with an adaptive top spring on its exterior, and the two ends of the adaptive top spring abut against the side of the pressure frame and the interior of the connecting seat, respectively.

[0010] Furthermore, the side of the contact frame is provided with an arc-shaped balance bar, and the balance bar is inserted into the side of the pressure frame. The center of the balance bar is located on the rotation axis of the contact frame. The outside of the balance bar is provided with a balance top spring. The two ends of the balance top spring abut against the side of the contact frame and the side of the pressure frame, respectively. There are two balance top springs, and the two balance top springs are symmetrically arranged at the top and bottom of the pressure frame.

[0011] Furthermore, the adaptation mechanism also includes two abutting rollers, the abutting frame is a "U" shaped frame, the two abutting rollers are rotatably connected to the top and bottom of the abutting frame respectively, and the two abutting rollers are symmetrically arranged along the axis of the abutting frame.

[0012] Furthermore, the welding mechanism also includes a positioning worm and an adjusting rod. The positioning worm is rotatably connected inside the positioning seat, and the adjusting rod is rotatably connected inside the positioning seat. A positioning worm wheel is provided outside the rotating shaft of the welding torch holder, and the positioning worm wheel and the positioning worm are connected by a transmission.

[0013] Furthermore, the positioning worm gear has a synchronization groove inside, the middle section of the adjusting rod has a regular polygonal cross-section, and the section of the adjusting rod with the regular polygonal cross-section is inserted into the synchronization groove.

[0014] Furthermore, the welding mechanism also includes a positioning rod, which is rotatably connected inside the contact frame, and the outer side of the middle part of the positioning rod is threaded, and the positioning rod is screwed into the inside of the positioning seat through the rod thread.

[0015] This invention provides an auxiliary structure for welding of a drying cylinder, which has the following beneficial effects: The auxiliary components enable welding assembly between the drying cylinder bodies. The adapting mechanism has contour-following capabilities, allowing the welding mechanism to perform conformal welding along the curved surface of the cylinder body. This ensures that the welding distance between the welding mechanism and the cylinder body remains precise and consistent, effectively guaranteeing welding quality. Furthermore, the adapting mechanism can automatically adapt to welding assembly of cylinder bodies with different outer diameters, offering flexibility and convenience. The angle between the welding torch and the cylinder body during welding can be freely adjusted to accommodate different welding process requirements. Simultaneously, the auxiliary components ensure that the welding area remains below the cylinder body during welding, facilitating precise control of the welding process and operational status by the operator. The entire process eliminates the need for climbing, significantly improving operational convenience and greatly enhancing the flexibility, adaptability, safety, and practicality of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram: Figure 1 A schematic diagram of the structure of the present invention is shown.

[0019] Figure 2 A schematic diagram of the internal structure of the present invention is shown.

[0020] Figure 3 The present invention is shown. Figure 2 Enlarged structural diagram of part A in the middle.

[0021] Figure 4 A schematic diagram of the disassembled drive mechanism and adaptation mechanism of the present invention is shown.

[0022] Figure 5 A schematic diagram of the disassembled welding mechanism of the present invention is shown.

[0023] Figure 6A schematic diagram of the track plate of the present invention is shown.

[0024] Figure 7 The present invention is shown. Figure 2 A schematic diagram of the internal structure during the welding operation of the drying cylinder body.

[0025] Figure 8 The present invention is shown. Figure 7 Enlarged structural diagram of part B in the middle.

[0026] Figure 9 The present invention is shown. Figure 7 Enlarged structural diagram of part C in the middle.

[0027] Figure 10 A schematic diagram of the internal structure of the small-diameter drying cylinder body of the present invention is shown when it is to be processed.

[0028] Figure 11 The present invention is shown. Figure 10 A schematic diagram of the internal structure during the welding operation of the drying cylinder body.

[0029] Figure 12 The present invention is shown. Figure 11 Enlarged structural diagram of part D in the middle.

[0030] Figure 13 This invention has been modified. Figure 2 A schematic diagram of the structure of the welding torch after it has been used at an angle.

[0031] List of reference numerals 1. Component placement; 101. Connecting seat; 102. Track plate; 1021. Moving rack; 1022. Holding groove; 1023. Retraction groove; 2. Drive mechanism; 201. Drive motor; 2011. Drive gear; 202. Slider seat; 3. Adaptation mechanism; 301. Connecting seat; 302. Pressure frame; 3021. Adaptation top spring; 303. Abutment frame; 3031. Balance bar; 3032. Balance top spring; 304. Reset frame; 3041. Pull baffle; 3042. Retracting rod; 305. Abutment roller; 4. Welding mechanism; 401. Positioning seat; 402. Welding torch holder; 4021. Positioning worm gear; 403. Positioning worm; 4031. Synchronizing groove; 404. Adjusting rod; 405. Positioning rod; 5. Welding torch. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please refer to Figures 1 to 13 Example 1: This invention proposes an auxiliary structure for welding of drying cylinders, comprising: a placement component 1 and an auxiliary component. The placement component 1 includes a docking seat 101 and a clamping mechanism. Two drying cylinders to be welded and assembled are placed on the top of the docking seat 101, and the drying cylinders are fixed and positioned by the clamping mechanism. The specific structure and working principle of the clamping mechanism are existing mature technologies and will not be described in detail here. The placement component 1 also includes a track plate 102, which is fixedly installed in the middle of the docking seat 101. The auxiliary component consists of a driving mechanism 2, an adaptation mechanism 3, and a welding mechanism 4. The drive mechanism 2 includes a drive motor 201 and a slider seat 202. The drive motor 201 is fixedly installed on the side of the slider seat 202, and the slider seat 202 is inserted into the top of the track plate 102. The adaptation mechanism 3 also includes a connecting seat 301, a pressure frame 302, a contact frame 303, and a reset frame 304. The connecting seat 301 is fixedly installed on the side of the slider seat 202, and the pressure frame 302 is inserted into the inside of the connecting seat 301. The contact frame 303 is rotatably connected to the side of the pressure frame 302, and the reset frame 304 is inserted into the inside of the connecting seat 301 and the pressure frame 302. The welding mechanism 4 includes a positioning seat 401 and a welding torch holder 402. The positioning seat 401 is inserted into the side of the contact frame 303, and the welding torch holder 402 is rotatably connected to the side of the positioning seat 401. A welding torch 5 is detachably and fixedly installed inside the welding torch holder 402. The adaptation mechanism 3 also includes two abutting rollers 305. The abutting frame 303 is a "U" shaped frame. The two abutting rollers 305 are rotatably connected to the top and bottom of the abutting frame 303, and the two abutting rollers 305 are symmetrically arranged along the axis of the abutting frame 303.

[0034] The track plate 102 has a semi-circular notch at the top, and a movable rack 1021 is provided at the top of the notch. The drive motor 201 has a drive gear 2011 on the outside of its shaft. The drive gear 2011 and the movable rack 1021 mesh and drive each other. In use, after placing the two sections of the drying cylinder body to be welded and assembled on the top of the docking seat 101 and placing the welding part on the side of the welding torch 5, the two sections of the drying cylinder body are fixed and positioned by the clamping mechanism. Then, the auxiliary components can be used to perform welding and assembly operations. When the auxiliary components are in the reset state, the welding mechanism 4 is in the avoidance position and will not intrude into the top space of the track plate 102, that is, it will not intrude into the operating space when the drying cylinder is lifted and placed, which facilitates the lifting and placement operations before and after the welding and assembly of the drying cylinder body. It is flexible and convenient to use.

[0035] The reset frame 304 has a pull baffle 3041 at one end, which abuts against the side of the pressure frame 302 and is located on the side of the pressure frame 302 near the contact frame 303. The reset frame 304 has a retractable rod 3042 at the other end, and the track plate 102 has a control groove inside, with the retractable rod 3042 inserted into the control groove. The control groove consists of an arc-shaped holding groove 1022 and an arc-shaped pull groove 1023, with the bottom end of the pull groove 1023 connected to the top end of one end of the holding groove 1022. The center of the holding groove 1022 and the center of the semi-circular notch at the top of the track plate 102 are at the same position, and the axis of the assembly drying cylinder to be welded is also at the same position. Located on the vertical line of the center of the groove 1022, during use, when the auxiliary component is in the reset state, the drive mechanism 2 is at the top of the track plate 102 on one side of the pull-up groove 1023, and the take-up rod 3042 is at the top of the pull-up groove 1023. Thus, under the combined action of the pull-up groove 1023 and the take-up rod 3042, the reset frame 304 can pull the pressure frame 302 away from the top space of the track plate 102 by pulling the baffle 3041. The pressure frame 302 can also drive the contact frame 303 and its internal welding mechanism 4 to move away from the top space of the track plate 102 simultaneously, which facilitates the hoisting and placement of the drying cylinder body before and after welding and assembly, and is convenient and flexible to use.

[0036] The pressure frame 302 is externally equipped with an adaptive top spring 3021, with both ends of the adaptive top spring 3021 abutting against the side of the pressure frame 302 and the inside of the connecting seat 301, respectively. During use, when the auxiliary components perform welding operations on the drying cylinder body, the drive mechanism 2 can drive the adaptive mechanism 3 to move around the drying cylinder body from the bottom, and the welding mechanism 4 performs welding operations on the drying cylinder body. When the drive motor 201 rotates, the drive gear 2011 can drive the slider seat 202 to move along the top of the track plate 102 via the moving rack 1021. The retracting rod 3042 enters the holding groove 1022 from the retracting groove 1023. During this process, guided by the retracting groove 1023, the reset frame 304 moves towards the drying cylinder body, thereby releasing the pressure frame 302. After the pressure frame 302 is released, under the action of the adapting top spring 3021, the pressure frame 302 can drive the abutment frame 303 to move towards the drying cylinder body until the abutment roller 305 abuts against the outside of the drying cylinder body. The abutment frame 303 has an arc-shaped balance bar 3031 on its side, and the balance bar 3031 is inserted into... On the side of the pressure frame 302, the center of the balance bar 3031 is located on the rotation axis of the contact frame 303. A balance spring 3032 is provided on the outside of the balance bar 3031. The two ends of the balance spring 3032 abut against the sides of the contact frame 303 and the pressure frame 302, respectively. Two balance springs 3032 are provided, symmetrically arranged at the top and bottom of the pressure frame 302. Because the contact frame 303 has a "U"-shaped design, after the contact roller 305 contacts the outside of the drying cylinder, the two balance springs 3032 work together to... The contact frame 303 can automatically rotate along its own axis to adapt to the external contour of the drying cylinder body, and ensure that the welding torch 5 is always at a fixed angle and distance from the drying cylinder body for welding operations. Afterwards, when the drive mechanism 2 continues to move, the retractable rod 3042 will move inside the retaining groove 1022, so that the pressure frame 302 is always in the released state. Thus, the welding mechanism 4 can always fit against the outside of the drying cylinder body for welding operations, which is stable in use. Moreover, regardless of the outer diameter of the drying cylinder body, the auxiliary components can automatically adapt and conform to the shape for welding, making it flexible and convenient to use.

[0037] The welding mechanism 4 includes a positioning worm gear 403, an adjusting rod 404, and a positioning rod 405. The positioning worm gear 403 is rotatably connected inside the positioning seat 401, and the adjusting rod 404 is rotatably connected inside the positioning seat 401. A positioning worm wheel 4021 is provided outside the rotating shaft of the welding torch holder 402, and the positioning worm wheel 4021 and the positioning worm gear 403 are connected by a transmission. A synchronization groove 4031 is provided inside the positioning worm gear 403. The middle section of the adjusting rod 404 has a regular polygonal cross-section, and this polygonal section is inserted into the synchronization groove 4031. The positioning rod 405 is rotatably connected inside the contact frame 303, and a thread is provided outside the middle section of the positioning rod 405. The positioning rod 405 is screwed into the positioning seat 401 via the thread. In use, the welding torch 5... The angle between the welding torch 5 and the cylinder body can be freely adjusted during welding, adapting to the welding process requirements of different specifications. When it is necessary to adjust the operating angle of the welding torch 5, simply rotate the adjusting rod 404. When the adjusting rod 404 is rotated, it drives the positioning worm gear 403 to rotate through the synchronous groove 4031. When the positioning worm gear 403 rotates, it drives the welding torch holder 402 to move through the positioning worm wheel 4021, thereby changing the operating angle of the welding torch 5. The operating position of the welding torch 5 on the side of the contact frame 303 can also be freely adjusted. When the positioning rod 405 is rotated, it drives the positioning seat 401 to move up and down on the side of the contact frame 303 through the rod thread, changing the operating position, thereby changing the operating position of the welding torch holder 402 and the welding torch 5. The adjustment is convenient and highly adaptable.

[0038] The specific usage and function of this embodiment: In this invention, after placing the two sections of the drying cylinder body to be welded and assembled on the top of the docking seat 101, and placing the welding part on the side of the welding torch 5, the two sections of the drying cylinder body are fixed and positioned by the clamping mechanism. Then, welding and assembly operations can be performed using the auxiliary component. When the auxiliary component is in the reset state, the welding mechanism 4 is in a clearance position, which will not intrude into the top space of the track plate 102, i.e., it will not intrude into the operating space during the lifting and placement of the drying cylinder, facilitating the lifting and placement operations before and after the welding and assembly of the drying cylinder body. When the auxiliary component is in the reset state, the drive mechanism 2 is located at the top of the track plate 102 on the side of the take-up groove 1023, and the take-up rod 3042 is located at the take-up position. The top of the pull groove 1023, under the combined action of the pull groove 1023 and the release rod 3042, allows the reset frame 304 to pull the pressure frame 302 away from the top space of the track plate 102 by pulling the baffle 3041. The pressure frame 302 can then drive the contact frame 303 and its internal welding mechanism 4 to move away from the top space of the track plate 102, facilitating the hoisting and placement of the drying cylinder body before and after welding assembly. When the auxiliary components perform welding operations on the drying cylinder body, the drive mechanism 2 can drive the adaptation mechanism 3 to move around the drying cylinder body from the bottom, and perform welding processing operations on the drying cylinder body through the welding mechanism 4. When the drive motor 201 rotates, the drive gear 2011 can drive the slider by moving the rack 1021. The seat 202 moves along the top of the track plate 102. During this movement, the retracting rod 3042 enters the holding groove 1022 from the retracting groove 1023. During this process, under the guidance of the retracting groove 1023, the reset frame 304 moves towards the drying cylinder body, thereby releasing the pressure frame 302. After the pressure frame 302 is released, under the action of the adapting top spring 3021, the pressure frame 302 can drive the abutment frame 303 to move synchronously towards the drying cylinder body until the abutment roller 305 abuts against the outside of the drying cylinder body. Since the abutment frame 303 has a "U" shaped design, after the abutment roller 305 abuts against the outside of the drying cylinder body, under the action of the two balance top springs 3032, the abutment frame 303 can automatically rotate along its own axis. The welding torch 5 adapts to the external contour of the drying cylinder body and ensures that the welding torch 5 is always at a fixed angle and distance from the drying cylinder body during welding operations. Afterwards, as the drive mechanism 2 continues to move, the retractable rod 3042 moves within the retaining groove 1022, keeping the pressure frame 302 in a released state. This allows the welding mechanism 4 to always be in close contact with the outside of the drying cylinder body for welding operations, ensuring stable operation. Regardless of the outer diameter of the drying cylinder body, the auxiliary components can automatically adapt and conform to the shape for welding. The angle between the welding torch 5 and the cylinder body during welding is freely adjustable, adapting to different welding process requirements. When the angle of the welding torch 5 needs to be adjusted, simply rotate the adjusting rod 404.The adjusting rod 404 drives the positioning worm gear 403 to rotate via the synchronization groove 4031. When the positioning worm gear 403 rotates, it drives the welding torch holder 402 to move via the positioning worm wheel 4021, thereby changing the operating angle of the welding torch 5. The operating position of the welding torch 5 on the side of the contact frame 303 can also be freely adjusted. When the positioning rod 405 is rotated, it drives the positioning seat 401 to move up and down on the side of the contact frame 303 via the rod thread, changing the operating position and thus altering the operating positions of the welding torch holder 402 and the welding torch 5.

Claims

1. An auxiliary structure for welding a drying cylinder, comprising: The assembly includes a placement component (1) and an auxiliary component. The placement component (1) includes a docking seat (101) and a clamping mechanism. Two drying cylinders to be welded are placed on the top of the docking seat (101), and the drying cylinders are fixed and positioned by the clamping mechanism. The placement component (1) also includes a track plate (102), which is fixedly installed in the middle of the docking seat (101). The auxiliary component consists of a driving mechanism (2), an adaptation mechanism (3), and a welding mechanism (4). The driving mechanism (2) includes a drive motor (201) and a slider seat (202). The drive motor (201) is fixedly installed on the side of the slider seat (202), and the slider seat (202) is inserted into the top of the track plate (102). The adapting mechanism (3) also includes a connecting seat (301), a pressure frame (302), a contact frame (303), and a reset frame (304). The connecting seat (301) is fixedly installed on the side of the slider seat (202), and the pressure frame (302) is inserted into the connecting seat (301). Inside 1), the contact frame (303) is rotatably connected to the side of the pressure frame (302), and the reset frame (304) is inserted into the inside of the connecting seat (301) and the pressure frame (302); the welding mechanism (4) includes a positioning seat (401) and a welding gun holder (402). The positioning seat (401) is inserted into the side of the contact frame (303), and the welding gun holder (402) is rotatably connected to the side of the positioning seat (401). The welding gun (5) is detachably fixed inside the welding gun holder (402).

2. The auxiliary structure for welding of a drying cylinder according to claim 1, characterized in that, The top of the track plate (102) is provided with a semi-circular arc-shaped notch, and the top of the arc-shaped notch is provided with a movable rack (1021). The drive motor (201) has a drive gear (2011) on the outside of its rotating shaft. The drive gear (2011) and the movable rack (1021) are meshed and driven.

3. The auxiliary structure for welding of a drying cylinder according to claim 2, characterized in that, One end of the reset frame (304) is provided with a pull baffle (3041), which abuts against the side of the pressure frame (302) and is located on the side of the pressure frame (302) close to the contact frame (303). The other end of the reset frame (304) is provided with a retractable rod (3042), and the inside of the track plate (102) is provided with a control groove, and the retractable rod (3042) is inserted into the inside of the control groove.

4. The auxiliary structure for welding of a drying cylinder according to claim 3, characterized in that, The control groove consists of an arc-shaped retaining groove (1022) and an arc-shaped pulling groove (1023). The bottom end of the pulling groove (1023) is connected to the top end of one end of the retaining groove (1022). The center of the groove body of the retaining groove (1022) and the center of the semi-circular arc-shaped notch at the top of the track plate (102) are at the same position. The axis of the assembly drying cylinder to be welded is on the vertical line of the center of the groove body of the retaining groove (1022).

5. The auxiliary structure for welding of a drying cylinder according to claim 4, characterized in that, The pressure frame (302) is provided with an adaptive top spring (3021) on its exterior, and the two ends of the adaptive top spring (3021) abut against the side of the pressure frame (302) and the interior of the connecting seat (301), respectively.

6. The auxiliary structure for welding of a drying cylinder according to claim 5, characterized in that, The side of the contact frame (303) is provided with an arc-shaped balance bar (3031), and the balance bar (3031) is inserted into the side of the pressure frame (302). The center of the balance bar (3031) is located on the rotation axis of the contact frame (303). The outside of the balance bar (3031) is provided with a balance top spring (3032). The two ends of the balance top spring (3032) abut against the side of the contact frame (303) and the side of the pressure frame (302) respectively. There are two balance top springs (3032), and the two balance top springs (3032) are symmetrically arranged at the top and bottom of the pressure frame (302).

7. The auxiliary structure for welding of a drying cylinder according to claim 6, characterized in that, The adaptation mechanism (3) also includes two abutting rollers (305), the abutting frame (303) is a "U" shaped frame, the two abutting rollers (305) are rotatably connected to the top and bottom of the abutting frame (303) respectively, and the two abutting rollers (305) are symmetrically arranged along the axis of the abutting frame (303).

8. The auxiliary structure for welding of a drying cylinder according to claim 7, characterized in that, The welding mechanism (4) further includes a positioning worm (403) and an adjusting rod (404). The positioning worm (403) is rotatably connected inside the positioning seat (401), and the adjusting rod (404) is rotatably connected inside the positioning seat (401). The welding torch holder (402) has a positioning worm wheel (4021) on the outside of its rotating shaft, and the positioning worm wheel (4021) and the positioning worm (403) are connected by a transmission.

9. The auxiliary structure for welding of a drying cylinder according to claim 8, characterized in that, The positioning worm (403) has a synchronization groove (4031) inside. The middle section of the adjusting rod (404) has a regular polygonal cross-section, and the section of the regular polygonal cross-section of the adjusting rod (404) is inserted into the inside of the synchronization groove (4031).

10. The auxiliary structure for welding of a drying cylinder according to claim 9, characterized in that, The welding mechanism (4) also includes a positioning rod (405), which is rotatably connected to the inside of the contact frame (303). The outside of the middle part of the positioning rod (405) is threaded, and the positioning rod (405) is screwed into the inside of the positioning seat (401) through the rod thread.

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