A bottom-driven coater shaft roller vertical welding device

Abstract

The application relates to the technical field of shaft roller welding, and particularly discloses a bottom driving type coating machine shaft roller vertical welding device, which comprises a longitudinal support frame, the bottom end of the longitudinal support frame is provided with a rotating table for supporting a coating machine shaft roller, a lifting table can move up and down along the longitudinal support frame, a knocking alignment mechanism is arranged below the lifting table and comprises a supporting cylinder, a clamping alignment assembly and a knocking alignment assembly, a bottom centering mechanism is arranged at the bottom end of the supporting cylinder, the clamping alignment assembly comprises a bottom inclined rod which can rotate towards a shaft head side, the bottom inclined rod is provided with a knocking driving protrusion, the knocking alignment assembly is provided with a vertical through slot and a knocking stress protrusion, the knocking driving protrusion is located at a position which passes through the vertical through slot when the bottom inclined rod rotates inward, and a top pushing contact position is formed between the knocking driving protrusion and the lower side of the knocking stress protrusion. The application realizes stable centering of a shaft roller and a shaft head in a vertical placement state of the shaft roller, and realizes welding auxiliary positioning of reliably positioning the shaft head in the centering process.

Description

Technical Field

[0001] This invention relates to the field of shaft roller welding technology, specifically to a bottom-driven coating machine shaft roller vertical welding device. Background Technology

[0002] Coating machine rollers typically require the installation and welding of shaft heads at the ends. The coaxiality between the shaft head and the roller, as well as the degree of proper assembly after the shaft head enters the end of the roller, directly affect the subsequent rotational stability and welding quality of the roller.

[0003] In the relevant production process, the alignment of the roller and the roller head largely relies on manual straightening, temporary clamping, or external auxiliary tooling. Workers also need to observe from a high position and perform the welding operation, making the process cumbersome and requiring a high level of skill. When the roller head is not fully positioned or there is eccentricity between the roller and the roller, problems such as coaxiality deviation, unstable welding position, rework, or readjustment can easily occur after welding, affecting the processing efficiency and assembly reliability of the coating machine's rollers.

[0004] Therefore, there is an urgent need for a welding auxiliary device that can stably align the shaft roller and shaft head when the shaft roller is placed vertically, and ensure that the shaft head is reliably positioned during the alignment process. Summary of the Invention

[0005] This application provides a bottom-driven coating machine shaft roller vertical welding device, the main purpose of which is to achieve stable alignment of the shaft roller and shaft head in the vertical placement state of the shaft roller, and to promote reliable positioning of the shaft head during the alignment process.

[0006] To achieve the above objectives, this application provides a bottom-driven coating machine shaft roller vertical welding device, comprising: The longitudinal support frame has a rotating table at the bottom center for supporting the coating machine shaft roller; The lifting platform is capable of moving up and down along the longitudinal support frame; The striking alignment mechanism is located below the lifting platform and includes a support cylinder, a clamping alignment component, and a striking alignment component. A bottom centering mechanism is located at the bottom end of the support cylinder; The clamping and alignment assembly includes a bottom tilting rod that can rotate toward the shaft head side, and the bottom tilting rod is provided with a tapping drive protrusion. The striking alignment component is provided with a vertical through groove and a striking force protrusion. The striking driving protrusion is located at the position where the bottom tilting rod passes through the vertical through groove when it rotates inward, and forms a pushing contact position with the lower side of the striking force protrusion.

[0007] In one feasible implementation, multiple striking drive protrusions are arranged along the length direction of the bottom tilting rod, and the multiple striking drive protrusions sequentially form a pushing contact position and a passing release position with the striking force protrusion on the path of the inward rotation of the bottom tilting rod.

[0008] In one feasible implementation, the striking alignment assembly includes a striking inner ring, multiple lifting rods, a limiting seat, and a limiting end. The striking inner ring is located inside the support cylinder and is vertically movable. The multiple lifting rods are connected to the periphery of the striking inner ring. A vertical through groove is formed on the lifting rod. A striking force protrusion is provided on the inner wall of the vertical through groove. The limiting seat is provided on the inner wall of the support cylinder and sleeved on the lifting rod. The limiting end is provided at the top of the lifting rod and located above the limiting seat.

[0009] In one feasible embodiment, the clamping and alignment assembly further includes a vertical fixing rod, a connecting drive rod, and an abutment plate. The top end of the vertical fixing rod is fixedly connected to the lifting platform, one end of the bottom tilting rod is hinged to a hinge seat on the periphery of the support cylinder, the abutment plate is disposed at the other end of the bottom tilting rod, and the connecting drive rod is movably connected between the bottom end of the vertical fixing rod and the body of the bottom tilting rod.

[0010] In one feasible implementation, the abutment plate is located at the end of the bottom inclined rod away from the hinge seat, and a plurality of abutment plates are arranged opposite each other along the circumference of the support cylinder, forming a clamping and centering space corresponding to the outer periphery of the shaft head.

[0011] In one feasible embodiment, the bottom alignment mechanism includes an alignment cover fixed to the bottom end of the support cylinder. An opening is formed on the lower side of the alignment cover. The inner wall of the alignment cover includes a tightening surface and a vertical surface from bottom to top. The vertical surface is disposed opposite to the outer periphery of the coating machine roller. A plurality of guide ribs are provided on the inner side of the tightening surface at intervals along the circumferential direction.

[0012] In one feasible implementation, the bottom-driven coating machine shaft roller vertical welding device further includes a top support platform and a telescopic power device. The top support platform is located at the top of the longitudinal support frame, and the telescopic power device includes a telescopic cylinder located in the middle of the top support platform. The driving end of the telescopic cylinder is connected to the lifting platform. Auxiliary guide cylinders are provided on both sides of the top support platform, and guide rods connected to the lifting platform are provided inside the auxiliary guide cylinders.

[0013] In one feasible implementation, movable components are provided on both sides of the lifting platform, and the movable components are fitted onto the outer sides of the two side columns of the longitudinal support frame.

[0014] In one feasible embodiment, the bottom-driven coating machine shaft roller vertical welding device further includes a protective mechanism. A through-type operating area and an inclined viewing window are provided on the side of the support cylinder. The protective mechanism is located at the viewing window and includes a face mask and a slot for inserting the face mask. The slot is located inside the viewing window.

[0015] In one feasible implementation, the bottom-driven coating machine shaft roller vertical welding device further includes a working step, which is disposed on one side of the longitudinal support frame, and the side of the working step near the coating machine shaft roller forms a platform.

[0016] This application provides a bottom-driven vertical welding device for coating machine shaft rollers. The vertical welding auxiliary structure is formed by a longitudinal support frame, a lifting platform, a striking alignment mechanism, and a bottom centering mechanism, which enables the coating machine shaft roller to be vertically supported on the rotating platform. The lifting platform drives the support cylinder, clamping alignment component, striking alignment component, and bottom centering mechanism to approach the shaft roller and shaft head as a whole. The bottom centering mechanism first guides and centers the outer circumference of the shaft roller, and the clamping alignment component then clamps and centers the outer circumference of the shaft head. At the same time, the striking drive protrusion on the bottom inclined rod pushes and passes over the striking force protrusion on the striking alignment component in the rotation path, causing the striking alignment component to move upward and downward, thereby forming a striking effect on the end of the shaft head. Therefore, the present invention can simultaneously achieve shaft roller alignment, shaft head alignment, and shaft head tapping into place in a single lifting and clamping alignment action, reducing the need for repeated manual straightening and individual tapping adjustments. This is beneficial for improving the coaxiality of the shaft head and shaft roller, assembly reliability, and pre-welding positioning efficiency, and facilitates subsequent rotational welding or segmented welding while maintaining alignment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the vertical welding device for the bottom-driven coating machine shaft roller provided in the embodiments of this application.

[0018] Figure 2 This is a front view structural schematic diagram of the vertical welding device for the bottom-driven coating machine shaft roller provided in the embodiments of this application.

[0019] Figure 3 This is a partially enlarged structural diagram showing the installation positions of the lifting platform, the striking alignment mechanism, and the bottom centering mechanism provided in the embodiments of this application.

[0020] Figure 4 This is a schematic diagram of the striking alignment mechanism and the bottom centering mechanism provided in the embodiments of this application.

[0021] Figure 5 This is a cross-sectional view of the bottom centering mechanism provided in the embodiments of this application.

[0022] Figure 6 This is a partial structural diagram of the clamping alignment component and the striking alignment component cooperation structure provided in the embodiments of this application.

[0023] Figure 7 This is a schematic diagram of the installation state of the clamping alignment component and the striking alignment component provided in the embodiments of this application.

[0024] Figure 8 This is a schematic diagram showing the relative positions of the coating machine roller and the shaft head in the embodiments of this application.

[0025] In the diagram: 10. Longitudinal support frame; 20. Top support platform; 30. Telescopic power unit; 40. Working steps; 50. Lifting platform; 60. Coating machine shaft roller; 70. Impact alignment mechanism; 80. Protective mechanism; 90. Bottom centering mechanism; 11. Rotary table; 31. Telescopic cylinder; 32. Auxiliary guide cylinder; 33. Drive end; 34. Guide rod; 41. Platform; 51. Movable kit; 61. Shaft head; 71. Support cylinder; 72. Clamping alignment component, 73, striking alignment component, 81, face mask, 82, slot, 91, alignment cover body, 92, tightening surface, 93, vertical surface, 94, guide rib, 721, vertical fixing rod, 722, bottom tilting rod, 723, connecting drive rod, 724, abutment plate, 725, striking drive protrusion, 731, striking inner ring, 732, lifting rod, 733, limiting seat, 734, limiting end, 735, striking force protrusion. Detailed Implementation

[0026] The embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the following embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention; without departing from the concept of the present invention, those skilled in the art can make equivalent substitutions for the specific shape, connection method or arrangement of each component.

[0027] like Figures 1 to 8 As shown, this embodiment provides a bottom-driven vertical welding device for coating machine rollers, which includes a longitudinal support frame 10, a top support platform 20, a telescopic power device 30, a working step 40, a lifting platform 50, a striking alignment mechanism 70, a protective mechanism 80, and a bottom centering mechanism 90. The longitudinal support frame 10 serves as the vertical load-bearing structure of the entire machine. A rotary table 11 is located at the bottom center of the longitudinal support frame 10. The coating machine roller 60 is vertically placed on the rotary table 11, and the shaft head 61 is located inside the upper end of the coating machine roller 60. The rotary table 11 supports the coating machine roller 60 and can drive the coating machine roller 60 to rotate during the welding process, allowing the operator to complete continuous or segmented welding along the circumference.

[0028] like Figures 1 to 3As shown, a top support platform 20 is positioned horizontally at the top of the longitudinal support frame 10, and a telescopic power device 30 is mounted on the top support platform 20. The telescopic power device 30 includes a telescopic cylinder 31, an auxiliary guide cylinder 32, a drive end 33, and guide rods 34. The telescopic cylinder 31 is located in the middle of the top support platform 20, and the drive end 33 is located at the lower end of the telescopic cylinder 31 and connected to the lifting platform 50. The auxiliary guide cylinders 32 are located on both sides of the top support platform 20, and the guide rods 34 can move vertically within the auxiliary guide cylinders 32. The lower ends of the guide rods 34 are connected to the lifting platform 50. Through the dual constraints of the drive end 33 and the guide rods 34 on both sides, the lifting platform 50 can reliably move up and down relative to the longitudinal support frame 10.

[0029] like Figure 2 and Figure 3 As shown, the lifting platform 50 is located inside the longitudinal support frame 10, and movable components 51 are provided on both sides of the lifting platform 50. The movable components 51 are fitted onto the outer sides of the two side columns of the longitudinal support frame 10. The movable components 51 and the longitudinal support frame 10 form a sliding guide.

[0030] like Figures 3 to 7 As shown, the striking alignment mechanism 70 is located below the lifting platform 50. The striking alignment mechanism 70 includes a support cylinder 71, a clamping alignment assembly 72, and a striking alignment assembly 73. The support cylinder 71 is located above the coating machine roller 60 and corresponds to the roller head 61. The support cylinder 71 provides mounting support for the clamping alignment assembly 72 and the striking alignment assembly 73. Multiple clamping alignment assemblies 72 are arranged circumferentially along the support cylinder 71. The striking alignment assembly 73 is located inside the support cylinder 71 and can move slightly vertically so that its lower end can face the end step surface of the roller head 61.

[0031] like Figure 6 and Figure 7 As shown, the clamping and alignment assembly 72 includes a vertical fixing rod 721, a bottom tilting rod 722, a connecting drive rod 723, an abutment plate 724, and a striking drive protrusion 725. The top end of the vertical fixing rod 721 is fixedly connected to the bottom end of the lifting platform 50. One end of the bottom tilting rod 722 is hinged to a hinge seat on the periphery of the support cylinder 71. The abutment plate 724 is located at the end of the bottom tilting rod 722 away from the hinge seat. The connecting drive rod 723 is movably connected between the bottom end of the vertical fixing rod 721 and the body of the bottom tilting rod 722. Multiple abutment plates 724 are arranged opposite each other along the circumference of the support cylinder 71, forming a clamping and alignment space corresponding to the outer periphery of the shaft head 61. After the lifting platform 50 descends and the support cylinder 71 approaches the shaft head 61, the bottom tilting rod 722 can rotate toward the shaft head 61 under the traction of the connecting drive rod 723 and the restriction of the support cylinder 71, so that multiple abutment plates 724 gradually approach the outer periphery of the shaft head 61, thereby forming a circumferential clamping and centering of the shaft head 61.

[0032] like Figure 6and Figure 7 As shown, the striking alignment assembly 73 includes a striking inner ring 731, multiple lifting rods 732, a limiting seat 733, a limiting end 734, and a striking force-bearing protrusion 735. The striking inner ring 731 is located inside the support cylinder 71 and can move vertically. The lower end of the striking inner ring 731 serves as the striking end facing the stepped surface of the shaft head 61. Multiple lifting rods 732 are connected to the periphery of the striking inner ring 731. The lifting rods 732 extend vertically and have vertical through grooves. The striking force-bearing protrusion 735 is disposed on the inner wall of the vertical through grooves. The limiting seat 733 is disposed on the inner wall of the support cylinder 71 and sleeved on the lifting rods 732. The limiting end 734 is disposed at the top of the lifting rods 732 and located above the limiting seat 733. The limiting seat 733 guides the vertical movement of the lifting rod 732, and the limiting end 734 is used to restrict the lifting rod 732 from falling off relative to the limiting seat 733, and when the lifting platform 50 moves upward, the striking alignment component 73 can move upward with the support cylinder 71 as a whole.

[0033] like Figure 6 and Figure 7 As shown, the striking drive protrusion 725 is located on the periphery of the bottom tilting rod 722, and at the position where the bottom tilting rod 722 passes through the vertical through slot of the lifting rod 732 when it rotates towards the shaft head 61. The striking drive protrusion 725 and the striking force protrusion 735 are opposite each other in the inward and outward directions. When the striking drive protrusion 725 moves inward, it first contacts the lower side of the striking force protrusion 735 and forms a pushing contact position. Then it continues to rotate with the bottom tilting rod 722 and passes over the striking force protrusion 735 to form an overpass release position. In the pushing contact position, the striking drive protrusion 725 pushes the lifting rod 732 and the striking inner ring 731 upward through the striking force protrusion 735. In the overpass release position, the striking drive protrusion 725 disengages from the striking force protrusion 735, and the striking inner ring 731 falls back downward under its own weight and strikes the end step surface of the shaft head 61. When multiple striking drive protrusions 725 are arranged along the length of the bottom tilting rod 722, the bottom tilting rod 722 can cause the striking inner ring 731 to move up and down multiple times during one inward rotation, thereby forming multiple striking alignments on the shaft head 61.

[0034] like Figure 4 and Figure 5As shown, the bottom alignment mechanism 90 is located at the bottom end of the support cylinder 71. The bottom alignment mechanism 90 includes an alignment cover 91, a tightening surface 92, a vertical surface 93, and a guide rib 94. The alignment cover 91 is fixed to the bottom end of the support cylinder 71, and an opening is formed on the lower side of the alignment cover 91. The tightening surface 92 is located on the lower inner wall of the alignment cover 91, and the vertical surface 93 is located above the tightening surface 92. The tightening surface 92 gradually tightens upward from the opening side, and is used to guide the upper outer periphery of the coating machine roller 60 when the support cylinder 71 descends with the lifting platform 50. The vertical surface 93 is arranged opposite to the outer periphery of the coating machine roller 60, and is used to approach the outer periphery of the coating machine roller 60 after guidance and form an alignment restriction. The guide ribs 94 are arranged at intervals along the circumferential direction of the tightening surface 92. The side of the guide ribs 94 near the opening can be set as a rounded inlet to reduce jamming between the alignment cover 91 and the outer periphery of the coating machine roller 60 when the alignment cover 91 descends.

[0035] like Figures 3 to 5 As shown, a through-type operating area and an inclined viewing window are provided on the side of the support cylinder 71, and a protective mechanism 80 is provided at the viewing window. The protective mechanism 80 includes a face shield 81 and a slot 82. The slot 82 is located inside the viewing window, and the face shield 81 is inserted into the slot 82. The viewing window is used to allow the operator to observe the welding position between the shaft head 61 and the coating machine roller 60. The through-type operating area is used to allow the welding equipment to extend to the connection between the shaft head 61 and the coating machine roller 60. The face shield 81 is used to shield the operator's face during observation and welding.

[0036] like Figure 1 and Figure 2 As shown, the working step 40 is located on one side of the longitudinal support frame 10, and the side of the working step 40 near the coating machine shaft roller 60 forms a platform 41. The platform 41 faces the viewing window and operating area on the side of the support cylinder 71. The operator can stand on the platform 41, observe the alignment status of the shaft head 61 and the coating machine shaft roller 60 through the viewing window, and perform welding operations through the operating area.

[0037] The working process of this embodiment can be as follows: First, the coating machine roller 60 is placed vertically on the rotary table 11, and the shaft head 61 is placed inside the upper end of the coating machine roller 60; the telescopic cylinder 31 drives the lifting platform 50 to descend through the drive end 33, and the lifting platform 50 drives the support cylinder 71, the clamping alignment component 72, the striking alignment component 73 and the bottom centering mechanism 90 to descend together; the alignment cover 91 guides and centers the outer periphery of the coating machine roller 60 through the tightening surface 92 and the vertical surface 93, and the support cylinder 71 is supported at the upper end of the coating machine roller 60 and does not descend; After the support cylinder 71 and the coating machine roller 60 form a relatively stable position, the lifting platform 50 continues to descend, and the bottom tilting rod 722 rotates towards the shaft head 61 side, and the abutment plate 724 approaches the outer periphery of the shaft head 61 and forms a clamping center; at the same time, the striking drive protrusion 725 on the bottom tilting rod 722 pushes and passes over the striking force protrusion 735 in sequence, causing the lifting rod 732 and the striking inner ring 731 to move up and down repeatedly, and the striking inner ring 731 strikes the stepped surface at the end of the shaft head 61, so that the shaft head 61 falls more reliably into the assembly position of the coating machine roller 60. As the lifting platform 50 continues to descend, the bottom tilting rod 722 continues to fold inward. Simultaneously, the abutment plates 724 on the inner end of the bottom tilting rod 722 all concentrically abut against the shaft head. After the shaft head 61 is aligned with the coating machine roller 60, the rotary table 11 can drive the coating machine roller 60 to rotate. The operator stands on the platform 41 and completes welding through the operating area beside the support cylinder 71. After welding, the lifting platform 50 moves upward. When the striking drive protrusion 725 passes the striking force protrusion 735 again, it can also drive the striking inner ring 731 to strike the welding area, assisting in the removal of surface slag. Subsequently, the coating machine roller 60 can be removed.

[0038] In other embodiments, ball bearings may be provided on the abutment plate 724, the vertical surface 93 of the alignment cover 91, the inner top wall of the alignment cover 91, or the bottom end face of the striking inner ring 731 to reduce friction between them and the shaft head 61 or the coating machine roller 60, so that when the rotary table 11 drives the coating machine roller 60 to rotate, the relevant alignment structures can still remain close or in contact. The number, spacing, and protrusion height of the multiple striking drive protrusions 725 can be adjusted according to the required striking stroke, striking frequency, and rotation range of the bottom tilting rod 722, as long as they can sequentially form a pushing contact position and a release position with the striking force protrusions 735 on the inward rotation path of the bottom tilting rod 722.

[0039] Furthermore, in order to control the downward pressure exerted by the lifting platform 50 and the bottom centering mechanism 90 on the top of the coating machine roller 60 and to avoid damage to the roller or support cylinder 71 due to excessive downward pressure, the telescopic power device 30 also includes a pressure feedback component.

[0040] In one feasible implementation, the pressure feedback component includes a pressure sensor disposed at the connection between the drive end 33 of the telescopic cylinder 31 and the lifting platform 50, and a controller that receives the pressure sensor signal and controls the movement of the telescopic cylinder 31. When the lifting platform 50 descends, and the alignment cover 91 at the bottom of the support cylinder 71 supports the upper end of the coating machine roller 60, as the lifting platform 50 continues to press down, the pressure value detected by the pressure sensor gradually increases. When the pressure value reaches a preset safety threshold, the controller controls the telescopic cylinder 31 to stop driving.

[0041] In another feasible implementation, the pressure feedback component can also be integrated inside the telescopic cylinder 31, which is a constant force output cylinder or hydraulic cylinder with a specified pressure threshold. With this configuration, when the support cylinder 71 contacts and supports the coating machine roller 60, the output force of the drive end 33 of the telescopic cylinder 31 is naturally limited below the pressure threshold, achieving a flexible stop in the pressing process.

[0042] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A vertical welding device for the shaft roller of a bottom-driven coating machine, characterized in that, include: The longitudinal support frame has a rotating table at the bottom center for supporting the coating machine shaft roller; The lifting platform is capable of moving up and down along the longitudinal support frame; The striking alignment mechanism is located below the lifting platform and includes a support cylinder, a clamping alignment component, and a striking alignment component. A bottom centering mechanism is located at the bottom end of the support cylinder; The clamping and alignment assembly includes a bottom tilting rod that can rotate toward the shaft head side, and the bottom tilting rod is provided with a tapping drive protrusion. The striking alignment component is provided with a vertical through groove and a striking force protrusion. The striking driving protrusion is located at the position where the bottom tilting rod passes through the vertical through groove when it rotates inward, and forms a pushing contact position with the lower side of the striking force protrusion.

2. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, The striking drive protrusions are arranged in multiple positions along the length of the bottom tilting rod. The multiple striking drive protrusions sequentially form a pushing contact position and a passing release position with the striking force protrusion on the path of the inward rotation of the bottom tilting rod.

3. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, The striking alignment assembly includes a striking inner ring, multiple lifting rods, a limiting seat, and a limiting end. The striking inner ring is located inside the support cylinder and can move vertically. The multiple lifting rods are connected to the periphery of the striking inner ring. A vertical through groove is formed on the lifting rod. A striking force protrusion is provided on the inner wall of the vertical through groove. The limiting seat is provided on the inner wall of the support cylinder and sleeved on the lifting rod. The limiting end is provided at the top of the lifting rod and located above the limiting seat.

4. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, The clamping and alignment assembly further includes a vertical fixing rod, a connecting drive rod, and an abutment plate. The top end of the vertical fixing rod is fixedly connected to the lifting platform. One end of the bottom tilting rod is hinged to a hinge seat on the periphery of the support cylinder. The abutment plate is disposed at the other end of the bottom tilting rod. The connecting drive rod is movably connected between the bottom end of the vertical fixing rod and the body of the bottom tilting rod.

5. The bottom-driven coating machine shaft roller vertical welding device according to claim 4, characterized in that, The abutment plate is located at the end of the bottom inclined rod away from the hinge seat. Multiple abutment plates are arranged opposite each other along the circumference of the support cylinder and form a clamping and centering space corresponding to the outer circumference of the shaft head.

6. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, The bottom alignment mechanism includes an alignment cover fixed to the bottom end of the support cylinder. An opening is formed on the lower side of the alignment cover. The inner wall of the alignment cover includes a tightening surface and a vertical surface from bottom to top. The vertical surface is arranged opposite to the outer periphery of the coating machine roller. A plurality of guide ribs are arranged at intervals along the circumferential direction on the inner side of the tightening surface.

7. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, It also includes a top support platform and a telescopic power device. The top support platform is located at the top of the longitudinal support frame. The telescopic power device includes a telescopic cylinder located in the middle of the top support platform. The drive end of the telescopic cylinder is connected to the lifting platform. Auxiliary guide cylinders are provided on both sides of the top support platform. Guide rods connected to the lifting platform are provided inside the auxiliary guide cylinders.

8. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, Movable components are provided on both sides of the lifting platform, and the movable components are fitted onto the outside of the two side columns of the longitudinal support frame.

9. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, It also includes a protective mechanism. The side of the support cylinder is provided with a through-type operating area and an inclined viewing window. The protective mechanism is located at the viewing window. The protective mechanism includes a face mask and a slot for inserting the face mask. The slot is located inside the viewing window.

10. The bottom-driven coating machine shaft roller vertical welding device according to claim 1, characterized in that, It also includes a working step, which is disposed on one side of the longitudinal support frame, and the side of the working step near the coating machine shaft roller forms a platform.

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