Height adjusting device for arc forming

By using detachable shims on the rotating shaft and adjusting the height of the positioning ring, the problem that existing devices cannot meet the roll forming requirements of U-shaped grooves of different depths is solved, and precise bending control of U-shaped grooves is achieved.

CN223616518UActive Publication Date: 2025-12-02XIAMEN ZHENGLIMING METALLURGICAL MACHINERY
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Patent Information

Application Number
CN202423249460.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-12-02
Estimated Expiration
2034-12-27

AI Technical Summary

Technical Problem

Existing roll bending equipment cannot meet the roll forming requirements of U-shaped groove plates of different depths, and the degree of bending of the U-shaped groove plates is difficult to control precisely.

Method used

A height adjustment device for curved forming was designed. By detachably mounting several shims on the rotating shaft and adjusting the vertical installation height of the positioning ring through fixing parts, the height of the pressure roller and the positioning ring can be adjusted to meet the requirements of roll forming of U-shaped groove plates of different depths.

Benefits of technology

It enables roll bending of U-shaped grooves of different depths, with a simple structure, easy operation, and precise control over the bending degree of the U-shaped grooves.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a height adjusting device for arc forming, which comprises a press roll group for roll bending, and the press roll group comprises a press roll wheel, a mounting seat and a rotating shaft; the rotating shaft is mounted on the mounting seat, and the compression roller is mounted on the rotating shaft; a plurality of gaskets are detachably sleeved on the rotating shaft, a positioning ring is movably mounted on the rotating shaft, and the vertical mounting height of the positioning ring is adjusted by changing the distribution of the gaskets sleeved on the rotating shaft; when a U-shaped groove plate is rolled and bent, the side face of the compression roller abuts against the side edge of the U-shaped groove plate, and the folded edge of the U-shaped groove plate is matched with the positioning ring. And the production requirements of roll forming of U-shaped groove plates with different depths can be met.
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Description

Technical Field

[0001] This utility model relates to bending plate roll forming equipment, and more particularly to a height adjustment device for bending arc forming. Background Technology

[0002] In the processing of steel plates, it is often necessary to bend the steel plates on both sides. Steel plate roll bending equipment can realize the processing technology of bending the steel plates on both sides. Roll bending is a process of bending the metal plate strip laterally by multiple rollers.

[0003] The transverse bending process of U-shaped channel plates involves shaping the folded edge inside the U-shaped channel opening. This is mainly to prevent the folded edge from deforming under stress when a transverse bending force is applied to the side. However, current roll forming machines can only process U-shaped channel plates of one depth. That is, the rollers used for roll bending can only accommodate U-shaped channel plates of one depth. Once the depth of the U-shaped channel plate changes, either the folded edge will be stuck and unable to pass through, or the folded edge cannot be shaped, resulting in the inability to perform transverse bending of the U-shaped channel plate. Furthermore, the degree of bending of the U-shaped channel plate is difficult to control precisely. Utility Model Content

[0004] The present invention aims to solve the problem that existing roller bending devices cannot meet the production needs of U-shaped groove plate roll forming at different depths, and therefore provides a height adjustment device for arc forming.

[0005] To solve the above-mentioned technical problems, this utility model provides a height adjustment device for bending arc forming, including a pressure roller group for roller bending, the pressure roller group including a pressure roller wheel, a mounting base and a rotating shaft; the rotating shaft is mounted on the mounting base, and the pressure roller wheel is mounted on the rotating shaft;

[0006] Several shims are detachably fitted on the rotating shaft, and a positioning ring is movably installed on the rotating shaft. The vertical installation height of the positioning ring can be adjusted by changing the distribution of the shims fitted on the rotating shaft.

[0007] When the U-shaped groove plate is bent by rollers, the side of the pressure roller abuts against the side of the U-shaped groove plate, and the folded edge of the U-shaped groove plate cooperates with the positioning ring.

[0008] In a preferred embodiment, the pressure roller, the gasket, and the positioning ring are sequentially assembled axially on the rotating shaft. The gasket and the positioning ring are detachably mounted on the rotating shaft by a fixing member. The number of gaskets between the pressure roller and the positioning ring is adjustable.

[0009] The fixing component includes a pressure block and a lifting screw. The lifting screw drives the pressure block to press down on the positioning ring, and the pressure block axially fixes the positioning ring.

[0010] In a preferred embodiment, the bottom of the pressure block is provided with a socket, which is adapted to the diameter of the rotating shaft;

[0011] The pressure block is pressed down, the rotating shaft is inserted into the insertion hole, and the pressure block is pressed down until it presses down on the positioning ring.

[0012] In a preferred embodiment, the diameter of the gasket is adapted to the diameter of the pressure roller, and the side of the pressure roller and the side of the gasket simultaneously abut against the side of the U-shaped groove plate;

[0013] The positioning ring protrudes from the gasket and has a raised edge, which presses against the folded edge.

[0014] In a preferred embodiment, a pressure roller, a positioning ring, and several shims are sequentially assembled axially on the rotating shaft. The pressure roller is detachably mounted on the rotating shaft via a fixing member. The positions of the shims and positioning ring assembled on the rotating shaft are adjustable.

[0015] The pressure roller is detachable from the rotating shaft, and the positioning ring and gasket are detachable from the rotating shaft; an annular plate is fixed on the rotating shaft, and the positioning ring and gasket are disposed between the annular plate and the pressure roller.

[0016] In a preferred embodiment, the fixing element is a bolt, and the pressure roller is locked to the rotating shaft by the bolt;

[0017] The bottom of the pressure roller has a groove, and the bolt is placed in the groove.

[0018] In a preferred embodiment, the diameter of the positioning ring is adapted to the diameter of the pressure roller, the side of the pressure roller and the side of the positioning ring simultaneously abut against the side of the U-shaped groove plate, and the folded edge is pressed against the upper end face of the positioning ring.

[0019] In a preferred embodiment, the pressure roller, the positioning ring, and a plurality of shims are sequentially assembled axially on the rotating shaft, and the rotating shaft is detachably mounted on the mounting base via a fixing member; the position of the shims assembled on the rotating shaft is adjustable;

[0020] The rotating shaft is detachable from the mounting base, and the gasket, pressure roller, and positioning ring are detachable from the rotating shaft.

[0021] In a preferred embodiment, the fixing element is a nut, the upper and lower ends of the rotating shaft are provided with threads, and the mounting base is provided with two mounting grooves; the rotating shaft is locked in the mounting groove by the nut and the thread engagement; the gasket can be detachably installed between the upper and lower ends of the rotating shaft and the mounting groove.

[0022] In a preferred embodiment, the positioning ring protrudes from the pressure roller and has a raised edge, which presses against the folded edge.

[0023] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0024] By incorporating several detachable shims, the vertical installation height of the pressure roller and positioning ring can be adjusted to meet the requirements of roll bending forming of U-shaped groove plates of different depths. Height adjustment is achieved by stacking different numbers of shims, resulting in a simple structure and easy operation. Attached Figure Description

[0025] Figure 1 This is a complete machine drawing of the roller bending mechanism in a preferred embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the U-shaped groove plate of the dynamic pressure roller group in a preferred embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the cooperation between the pressure roller group and the U-shaped groove plate during roller bending in a preferred embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram showing the disassembly of the height adjustment device in the first embodiment;

[0029] Figure 5 This is a schematic diagram of the assembly of the height adjustment device in the first embodiment;

[0030] Figure 6 This is a schematic diagram of the assembly of the height adjustment device in the second embodiment;

[0031] Figure 7 This is a schematic diagram showing the disassembly of the height adjustment device in the second embodiment;

[0032] Figure 8 This is a schematic diagram of the assembly of the height adjustment device in the third embodiment.

[0033] Explanation of reference numerals in the attached drawings: 1. Pressure roller group; 11. Pressure roller wheel; 12. Mounting base; 13. Rotating shaft; 14. Shim; 15. Positioning ring; 16. Protruding edge; 17. Annular plate; 18. Mounting groove; 2. Fixing component; 21. Pressure block; 22. Lifting screw; 23. Support frame; 24. Insertion hole; 25. Bolt; 26. Nut; 3. U-shaped groove plate; 31. U-shaped groove opening; 32. Side edge; 33. Folded edge; 4. Roller bending mechanism; 41. Fixed pressure roller group; 42. Moving pressure roller group; 43. First pressure roller group; 44. Second pressure roller group. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] refer to Figures 1-8 This embodiment provides a height adjustment device for bending arc forming. The height adjustment device is installed on the pressure roller group 1 for bending on the bending mechanism 4. The pressure roller group 1 includes a pressure roller 11, a mounting base 12 and a rotating shaft 13. The rotating shaft 13 is installed on the mounting base 12, and the pressure roller 11 is installed on the rotating shaft 13. The height adjustment device includes a plurality of shims 14. The shims 14 are detachably installed on the rotating shaft 13. A positioning ring 15 is movably arranged on the rotating shaft 13. The vertical installation height of the positioning ring 15 can be adjusted by changing the distribution of the shims 14 assembled on the rotating shaft 13.

[0038] like Figure 1 As shown, the roller group 1 on the roller bending mechanism 4 includes a fixed roller group 41 and a moving roller group 42. When the U-shaped groove plate 3 is bent by roller pressing, the fixed roller group 41 is used to position the sides 32 at both ends of the U-shaped groove plate 3, and the moving roller group 42 is used to bend and press the middle part of the U-shaped groove plate 3. The two ends of the U-shaped groove plate 3 are fixed and the middle is bent. After pressing, a curved U-shaped groove plate 3 with a certain arc can be formed.

[0039] When the moving pressure roller group 42 performs the middle rolling, a pressure roller group 43 and a pressure roller group 44 are set up to work together to simultaneously roll and bend both sides of the U-shaped groove plate 3, so as to ensure that the U-shaped groove plate 3 can be bent and deformed.

[0040] like Figure 2 As shown, the roller bending mechanism 4 is used to apply a transverse bending force to the U-shaped channel plate 3, causing the U-shaped channel plate 3 to bend and deform. The pressure roller 11 is used to abut against the side edge 32 of the U-shaped channel plate 3 as a transverse pressing roller. The U-shaped channel plate 3 includes a U-shaped opening 31, side edges 32 on both sides of the opening, and two inwardly folded edges 33 at the opening. When bending and pressing the U-shaped channel plate 3, the pressure roller 11 abuts against the side edge 32 of the U-shaped channel plate 3. When a transverse bending force is applied, to prevent the folded edges 33 from deforming under the action of the transverse bending force during the bending process, a positioning ring 15 is set to press and shape the folded edges 33 (e.g., ...). Figure 3 To avoid deformation at the 33-degree fold, etc. Figure 3 As shown, when the U-shaped groove plate 3 is bent by rollers, the side of the pressure roller 11 abuts against the side edge 32 of the U-shaped groove plate 3, and the folded edge 33 of the U-shaped groove plate 3 abuts against the positioning ring 15 for shaping.

[0041] The heights of the sides 32 and the folded edges 33 of the U-shaped groove plates 3 of different depths are also different. In this embodiment, a height adjustment device for the adjustable positioning ring 15 is provided, which adjusts the vertical installation height of the positioning ring 15 by changing the distribution of the shims 14 mounted on the rotating shaft 13.

[0042] First embodiment, reference Figure 4-5 .

[0043] A height adjustment device is provided to adjust the height of the positioning ring 15 by changing the number of shims 14. The pressure roller group 1 equipped with this height adjustment device can be used on a pressure roller group 43 in the moving pressure roller group 42 to perform roll bending pressing of the U-shaped groove plate 3.

[0044] Specifically, a pressure roller 11, a gasket 14, and a positioning ring 15 are sequentially assembled along the axial direction on the rotating shaft 13. The gasket 14 and the positioning ring 15 are detachably mounted on the rotating shaft 13 via a fixing member 2. The diameter of the gasket 14 is adapted to the diameter of the pressure roller 11, and the positioning ring 15 protrudes from the gasket 14 and has a raised edge 16, such as... Figure 2 As shown, when the U-shaped groove plate 3 is bent by roller, the side of the pressure roller 11 and the side of the pad 14 simultaneously abut against the side 32 of the U-shaped groove plate 3, and the protruding edge 16 of the positioning ring 15 presses down on the folded edge 33 of the U-shaped groove plate 3 to form a shaping fit.

[0045] The fixing component 2 includes a pressure block 21 and a lifting screw 22. The lifting screw 22 is mounted on the mounting base 12 via a support frame 23 and is located above the rotating shaft 13. The pressure block 21 is pressed downward under the drive of the lifting screw 22 to press the positioning ring 15 on the rotating shaft 13, thereby achieving axial fixation of the positioning ring 15 (e.g., ...). Figure 5 When the drive lifting screw 22 is lifted upward, the pressure block 21 disengages from the rotating shaft 13, and the positioning ring 15 and the gasket 14 can be detached relative to the rotating shaft 13 (e.g., Figure 4 The vertical installation height of the positioning ring 15 is adjusted by changing the number of shims 14 on the rotating shaft 13, and the axial fixation of the positioning ring 15 is achieved by the pressure block 21, thereby realizing height adjustment to meet the roll bending of U-shaped groove plates 3 of different depths.

[0046] To effectively hold the positioning ring 15 in place and accommodate different numbers of shims 14 for axial fixation during assembly, the bottom of the pressure block 21 is provided with an insertion hole 24, which is adapted to the diameter of the rotating shaft 13 (e.g., ...). Figure 4 When the pressure block 21 is pressed down, the rotating shaft 13 is inserted into the insertion hole 24, and the pressure block 21 can continue to press down until it presses down on the positioning ring 15. The insertion hole 24 is made to allow for better pressing of the positioning ring 15.

[0047] The detachable structure of the rotating shaft 13, positioning ring 15, and shim 14 is achieved by the up-and-down movement of the pressure block 21. This simplifies the disassembly process during height adjustment. Automated disassembly is achieved via the lifting screw 22. Even when the pressure roller assembly 1 is installed on complex equipment, rapid disassembly can be performed without additional tools. Figure 2 As shown, when the structure around the pressure roller assembly 1 is relatively complex after installation, it cannot be disassembled from the side 32. The pressure block 21 can be raised from the top to provide operating space, and the positioning ring 15 and the gasket 14 can be disassembled from the top.

[0048] Second embodiment, reference Figure 6-7 .

[0049] A height adjustment device is provided that adjusts the height of the positioning ring 15 by adjusting the position of the shim 14 mounted on the rotating shaft 13 and the positioning ring 15. The pressure roller group 1 equipped with this height adjustment device can be used on the second pressure roller group 44 in the moving pressure roller group 42 to perform roll bending pressing of the U-shaped groove plate 3.

[0050] Specifically, a pressure roller 11, a positioning ring 15, and a washer 14 are sequentially assembled axially on the rotating shaft 13. The pressure roller 11 is detachably mounted on the rotating shaft 13 via a fixing member 2. The diameter of the positioning ring 15 is adapted to the diameter of the pressure roller 11, and the diameter of the washer 14 is smaller than the diameter of the positioning ring 15. Figure 3When the U-shaped groove plate 3 is bent by rollers, the side of the pressure roller 11 and the side of the positioning roller simultaneously abut against the side 32 of the U-shaped groove plate 3, and the upper end of the positioning ring 15 presses the folded edge 33 of the U-shaped groove plate 3 upward to form a shaping fit.

[0051] An annular plate 17 is fixed on the rotating shaft 13. A positioning ring 15 and a shim 14 are arranged between the annular plate 17 and the pressure roller 11. The vertical position of the positioning ring 15 can be adjusted by adjusting the position of the shim 14. When the pressure roller is disassembled relative to the rotating shaft 13, the positioning ring 15 and the shim 14 can be disassembled downward relative to the rotating shaft 13 (e.g., Figure 7 ).

[0052] The fixing component 2 is a bolt 25. The pressure roller 11 and the rotating shaft 13 are fastened by the bolt 25. A groove is opened at the bottom of the pressure roller 11, and the bolt 25 is placed in the groove (e.g., Figure 6 The rotating shaft 13 and the pressure roller 11 are detachable by bolt 25, which makes the disassembly process simpler when adjusting the height. The structure is simple and the cost is low.

[0053] The positions of the positioning ring 15 and the shims 14 between the pressure roller 11 and the annular plate 17 are adjustable. When adjusting the height, loosen the bottom bolt 25, and disassemble the pressure roller 11, positioning ring 15, and shims 14 downwards relative to the rotating shaft 13. After adjusting the number of shims 14 according to the appropriate height, assemble that number of shims 14 below the annular plate 17. Then, assemble the positioning ring 15 in sequence. The remaining shims 14 can be installed between the pressure roller 11 and the positioning ring 15 (e.g., ...). Figure 7 By adjusting the number and position of the shims 14, the locking position between the pressure roller 11 and the rotating shaft 13 remains unchanged, and the bolt 25 can achieve locking.

[0054] In this embodiment, the height of the positioning ring 15 on the rotating shaft 13 is changed by adjusting the position distribution of the shims 14 on the rotating shaft 13, thereby adjusting the height of the positioning ring 15 to meet the requirements of roll bending of U-shaped groove plates 3 at different depths.

[0055] Third embodiment, reference Figure 8 .

[0056] A height adjustment device is provided that adjusts the height of the positioning ring 15 by adjusting the position of the shim 14 mounted on the rotating shaft 13. The pressure roller group 1 equipped with this height adjustment device can be used in the fixed pressure roller group 41 for roll bending pressing of the U-shaped groove plate 3.

[0057] Specifically, a pressure roller 11, a positioning ring 15, and several gaskets 14 are sequentially assembled along the axial direction on the rotating shaft 13. The rotating shaft 13 is detachably mounted on the mounting base 12 via a fixing member 2. The positioning ring 15 protrudes from the gasket 14 and has a raised edge 16. When the U-shaped groove plate 3 is bent by roller bending, the side of the pressure roller 11 abuts against the side edge 32 of the U-shaped groove plate 3, and the raised edge 16 of the positioning ring 15 presses down on the folded edge 33 of the U-shaped groove plate 3 to form a shaping fit.

[0058] After the rotating shaft 13 is disassembled relative to the mounting base 12, the gasket 14 is detachable relative to the rotating shaft 13. The fixing part 2 is a nut 26. Threads are provided at the upper and lower ends of the rotating shaft 13. Mounting grooves 18 are provided on the mounting base 12 corresponding to the upper and lower ends of the rotating shaft 13. The rotating shaft 13 is locked in the mounting groove 18 by the nut 26 and the thread engagement.

[0059] Shims 14 can be detachably installed between the upper and lower ends of the rotating shaft 13 and the mounting groove 18. When adjusting the height, the rotating shaft 13 is detached relative to the mounting base 12, and the shims 14, pressure roller 11, and positioning ring 15 are detached relative to the rotating shaft 13. At a suitable height of the rotating shaft 13, the axial installation height of the positioning ring 15 is adjusted by adjusting the number of shims 14 at the upper end of the rotating shaft 13. The remaining shims 14 can be installed at the lower end of the rotating shaft 13 to raise the pressure roller 11. In conjunction with the height adjustment of the positioning ring 15, the height requirements of the two mounting grooves 18 on the mounting base 12 are met, so that the pressure roller 11 is adjusted to a height that mates with the positioning ring 15.

[0060] In this embodiment, by adjusting the position distribution of the shims 14 on the rotating shaft 13 and the number of shims 14 set between the positioning ring 15 and the upper mounting groove 18, the lower mounting groove 18 and the pressure roller 11, the height of the positioning ring 15 and the pressure roller 11 can be adjusted, thereby achieving height adjustment to meet the roll bending of U-shaped groove plates 3 of different depths.

[0061] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A height adjustment device for bending arc forming, characterized in that: The device includes a pressure roller assembly for bending, the pressure roller assembly comprising a pressure roller wheel, a mounting base, and a rotating shaft; the rotating shaft is mounted on the mounting base, and the pressure roller wheel is mounted on the rotating shaft; Several shims are detachably fitted on the rotating shaft, and a positioning ring is movably installed on the rotating shaft. The vertical installation height of the positioning ring can be adjusted by changing the distribution of the shims fitted on the rotating shaft. When the U-shaped groove plate is bent by rollers, the side of the pressure roller abuts against the side of the U-shaped groove plate, and the folded edge of the U-shaped groove plate cooperates with the positioning ring.

2. The height adjustment device for bending arc forming according to claim 1, characterized in that: The pressure roller, the shim, and the positioning ring are sequentially assembled axially on the rotating shaft. The shim and the positioning ring are detachably mounted on the rotating shaft by a fixing member. The number of shims between the pressure roller and the positioning ring is adjustable. The fixing component includes a pressure block and a lifting screw. The lifting screw drives the pressure block to press down on the positioning ring, and the pressure block axially fixes the positioning ring.

3. The height adjustment device for bending arc forming according to claim 2, characterized in that: The bottom of the pressure block is provided with a socket, which is adapted to the diameter of the rotating shaft; The pressure block is pressed down, the rotating shaft is inserted into the insertion hole, and the pressure block is pressed down until it presses down on the positioning ring.

4. The height adjustment device for bending arc forming according to claim 3, characterized in that: The diameter of the gasket is adapted to the diameter of the pressure roller, and the side of the pressure roller and the side of the gasket simultaneously abut against the side of the U-shaped groove plate. The positioning ring protrudes from the gasket and has a raised edge, which presses against the folded edge.

5. The height adjustment device for bending arc forming according to claim 1, characterized in that: A pressure roller, a positioning ring, and several shims are sequentially assembled axially on the rotating shaft. The pressure roller is detachably mounted on the rotating shaft via a fixing component. The positions of the shims and positioning ring assembled on the rotating shaft are adjustable. The pressure roller is detachable from the rotating shaft, and the positioning ring and gasket are detachable from the rotating shaft; an annular plate is fixed on the rotating shaft, and the positioning ring and gasket are disposed between the annular plate and the pressure roller.

6. The height adjustment device for bending arc forming according to claim 5, characterized in that: The fixing component is a bolt, and the pressure roller is locked to the rotating shaft by the bolt; The bottom of the pressure roller has a groove, and the bolt is placed in the groove.

7. The height adjustment device for bending arc forming according to claim 6, characterized in that: The diameter of the positioning ring is adapted to the diameter of the pressure roller. The side of the pressure roller and the side of the positioning ring simultaneously abut against the side of the U-shaped groove plate, and the folded edge presses against the upper end face of the positioning ring.

8. The height adjustment device for bending arc forming according to claim 1, characterized in that: The pressure roller, positioning ring, and several shims are sequentially assembled axially on the rotating shaft. The rotating shaft is detachably mounted on the mounting base via a fixing member. The position of the shims assembled on the rotating shaft is adjustable. The rotating shaft is detachable from the mounting base, and the gasket, pressure roller, and positioning ring are detachable from the rotating shaft.

9. A height adjustment device for bending arc forming according to claim 8, characterized in that: The fixing component is a nut, the upper and lower ends of the rotating shaft are provided with threads, and the mounting base is provided with two mounting grooves; the rotating shaft is locked in the mounting groove by the nut and the thread engagement; the gasket can be detachably installed between the upper and lower ends of the rotating shaft and the mounting groove.

10. A height adjustment device for bending arc forming according to claim 8, characterized in that: The positioning ring protrudes from the pressure roller and has a raised edge, which presses against the folded edge.