A positioning device for forging processing

Abstract

This application discloses a positioning device for forging processing, relating to the field of forging processing technology. It includes a fixed bracket positioned along the height direction above a vertical lathe chuck. A positioning groove corresponding to a wind turbine main shaft is provided above the fixed bracket. A positioning component corresponding to the flange end of the wind turbine main shaft is provided at the top of the fixed bracket, with the wind turbine main shaft inserted downwards into the fixed bracket. A support component contacting the bottom end of the wind turbine main shaft is provided at the top of the fixed bracket, and a base engaging with the jaws of the vertical lathe chuck is provided at the bottom of the fixed bracket. The fixed bracket, base, and vertical lathe chuck are coaxially arranged. The top positioning component adapts to the large-diameter flange end to achieve end limiting, and the support component supports the bottom of the flange end to form stable support, constraining the lateral displacement of the large-diameter flange end. This prevents the wind turbine main shaft from shifting or tipping due to its high center of gravity and large overhang after reverse clamping, ensuring coaxiality and processing safety during the machining of the shaft through hole.

Description

Technical Field

[0001] This application relates to the field of forging processing technology, and in particular to a positioning device for forging processing. Background Technology

[0002] The wind turbine main shaft is a core large forging component of a wind turbine generator set. The machining accuracy of its central through-hole directly determines the coaxiality of the entire unit assembly and its operational stability. This critical process is generally completed using a vertical lathe. Vertical machining requires the wind turbine main shaft to be clamped and positioned in an upright position to ensure that the main shaft axis is strictly coaxial with the rotation center of the vertical lathe chuck. The assembly datum, support form, and positioning structure of the positioning device directly affect the machining accuracy, clamping efficiency, and machining safety of the central through-hole.

[0003] For machining the inner hole of a large-diameter, long-span wind turbine main shaft, the jaws of a vertical lathe chuck are used to clamp the shaft body or flange end of the wind turbine main shaft to complete the clamping and positioning of the workpiece. Since the wind turbine main shaft has a long span, after machining the shaft through hole at one end of the wind turbine main shaft, it needs to be reversed and clamped to machine the shaft through hole at the other end.

[0004] Regarding the aforementioned technologies, the inventors believe that when the wind turbine main shaft is reverse-clamped and positioned and clamped at the end of the wind turbine main shaft, the diameter of the flange end of the wind turbine main shaft is much larger than that of the shaft body, the overall center of gravity is relatively high and the overhang is large. The existing positioning method only relies on the jaws to clamp the shaft body, which cannot provide suitable positioning support for the large-diameter flange end of the wind turbine main shaft. Summary of the Invention

[0005] The purpose of this application is to provide a positioning device for forging processing, in order to improve the problem that when the wind turbine main shaft is reverse-clamped and positioned and clamped at the shaft end, the diameter of the flange end of the wind turbine main shaft is much larger than the shaft body, the overall center of gravity is high and the overhang is large, and the existing positioning method only relies on the jaws to clamp the shaft body, which cannot provide suitable positioning support for the large diameter flange end.

[0006] This application provides a positioning device for forging processing, which adopts the following technical solution: A positioning device for forging processing includes a fixed bracket positioned above a vertical lathe chuck along the height direction. A positioning groove corresponding to a wind turbine main shaft is provided above the fixed bracket. A positioning component corresponding to the flange end of the wind turbine main shaft is provided at the top of the fixed bracket, with the wind turbine main shaft inserted downwards into the fixed bracket. A support component contacting the bottom end of the wind turbine main shaft is provided at the top of the fixed bracket. A base engaging with the jaws of the vertical lathe chuck is provided at the bottom of the fixed bracket. The fixed bracket, base, and vertical lathe chuck are coaxially arranged.

[0007] By adopting the above technical solution, a fixed bracket in the height direction is set above the vertical chuck, and a base is matched with the chuck jaws to achieve rapid coaxial assembly of the positioning device and the vertical chuck. The positioning groove matches the wind turbine main shaft to achieve shaft insertion guidance. The top positioning component is adapted to the large-diameter flange end to achieve end limit. The support component supports the bottom of the flange end to form stable support. The installation form of the shaft being inserted into the fixed bracket with the shaft facing downward can restrain the lateral displacement of the large-diameter flange end. From the overall structure, the offset and tilting problems caused by the high center of gravity and large overhang after the wind turbine main shaft is clamped in the opposite direction are eliminated, ensuring the coaxiality and processing safety of the shaft through hole.

[0008] Optionally, the positioning assembly includes several positioning blocks that abut against the outer wall of the wind turbine main shaft flange end. A fixing seat is provided on the top of the fixing bracket. A sliding seat connected to the positioning blocks is slidably provided on the fixing seat in the radial direction of the wind turbine main shaft flange end. A screw rod that is threadedly connected to the sliding seat is rotatably provided inside the fixing seat. A rotating handle that is connected to the screw rod is provided on the outside of the fixing seat.

[0009] By adopting the above technical solution, the screw and sliding seat threaded transmission structure, together with the rotating handle, can precisely drive the positioning block to move radially along the flange end. It can adaptively fit the outer wall of the large-diameter flange end of the wind turbine main shaft, and realize the radial rigid limit of the flange end. The self-locking characteristic of the threaded transmission can keep the positioning block in a tight state for a long time, firmly restraining the radial wobble and offset of the flange end. With the coaxial fixed bracket, the coaxiality of the wind turbine main shaft and the vertical chuck is continuously guaranteed.

[0010] Optionally, the positioning block has several abutting protrusions on the side facing the flange end of the wind turbine main shaft; the support assembly includes a support column disposed on the top of the fixed bracket and abutting against the bottom of the flange end of the wind turbine main shaft, the top of the support column being higher than the height of the fixed seat and the sliding seat.

[0011] By adopting the above technical solution, the abutment protrusion of the positioning block can increase the contact friction with the outer wall of the flange end, further preventing the flange end from rotating circumferentially and sliding radially, and strengthening the anti-offset effect of the end positioning; the top of the support column is higher than the fixed seat and the sliding seat, which can preferentially support the bottom of the large-diameter flange end, avoid the flange end from colliding with the sliding parts, and provide multi-point bottom support for the flange end, dispersing the self-weight load of the flange end. Together with the positioning block, it forms a two-way constraint from top to bottom, which greatly improves the stability of the spindle after reverse clamping.

[0012] Optionally, the fixed bracket is provided with a fixed column at the top, the support column is slidably connected to the fixed column along the height direction of the fixed bracket, the outer wall of the support column is threaded, and the top of the fixed column is rotatably provided with a rotating part, the rotating part having a threaded groove that is threadedly connected to the outer wall of the support column.

[0013] By adopting the above technical solution, the threaded transmission between the rotating part and the support column enables the height of the support column to be adjustable, which can level the flange end of the wind turbine main shaft, correct the tilt deviation of the flange end when clamped in reverse, and ensure that the main shaft is in a horizontal and coaxial state. The precise leveling adjustment can make the flange end bear force evenly, avoid lateral displacement caused by uneven local force, and ensure the placement stability of the large-diameter flange end from the leveling support, providing a flat positioning reference for the machining of the shaft through hole.

[0014] Optionally, the fixed column has a clearance groove corresponding to the support column along its height direction, and a sliding square rod is provided in the clearance groove along its height direction. The bottom of the support column has a sliding groove adapted to the sliding square rod along its height direction.

[0015] By adopting the above technical solution, the matching structure of the sliding square rod and the support column forms a circumferential anti-rotation constraint, ensuring that the support column only makes linear lifting and lowering movements when the rotating part rotates, and will not deflect synchronously with the rotating part, thus ensuring the accuracy and stability of leveling adjustment; the stable linear lifting and lowering can avoid the support column offset causing the flange end to become unbalanced, continuously providing uniform support to the large-diameter flange end, and preventing the main shaft from offsetting and tipping due to the deflection of the support components.

[0016] Optionally, the fixed bracket is hollow inside, and the sidewalls of the fixed bracket are obliquely supported, with the bottom of the fixed bracket spaced apart from the bottom of the wind turbine main shaft.

[0017] By adopting the above technical solutions, the hollow structure of the fixed bracket reduces the overall weight and the load pressure on the vertical chuck. The obliquely supported sidewalls significantly improve the overall structural strength of the bracket, enabling it to withstand the heavy impact of large wind turbine main shafts. The fixed bracket is spaced apart from the bottom of the shaft, providing clearance for the shaft after reverse clamping, avoiding frictional interference between the shaft and the bracket. At the same time, it facilitates the direct fall of chips generated during the finishing of the wind turbine main shaft's through hole from the original inner hole of the wind turbine main shaft, preventing chips from accumulating in the inner hole.

[0018] Optionally, the inner wall of the fixed bracket is provided with a limiting abutment component that abuts against the outer wall of the wind turbine main shaft. The limiting abutment component includes a plurality of abutment portions arranged around the wind turbine main shaft, and the abutment portions are provided with a support frame connected to the inner wall of the fixed bracket.

[0019] By adopting the above technical solution, the limiting and abutting components set around the shaft body abut and limit from multiple directions on the outside of the shaft body, making up for the limitations of only end positioning, and constraining the wind turbine main shaft body in all directions after reverse clamping; multiple abutting parts work with the support frame to form a stable support structure, effectively suppressing the shaft body's sway and shaking during processing, strengthening the overall positioning stability from the middle of the shaft body, and working together with end positioning to prevent the main shaft from shifting and tipping over.

[0020] Optionally, the support frame is made up of multiple rods that are hinged together, and the end of the support frame is hinged to the abutment and the inner side wall of the fixed bracket. The side wall of the fixed bracket is threaded with a second screw, the end of the second screw is rotatably connected to the abutment, and the end of the second screw is provided with a second rotating handle. An arc-shaped limiting plate is provided on the side of the abutment near the wind turbine main shaft.

[0021] By adopting the above technical solution, the articulated support frame can flexibly adapt to wind turbine main shafts with different outer diameters. With the help of screw two and rotating handle two, the radial position of the contact part can be precisely adjusted. The arc-shaped limiting plate fits against the outer wall of the shaft to increase the contact area, avoid local stress damage to the shaft, and improve the limiting fit. This structure can flexibly and firmly tighten the shaft radially, constrain the radial displacement of the shaft in all directions, and prevent the shaking and displacement of the wind turbine main shaft during processing from the shaft limiting level.

[0022] Optionally, the fixed bracket is provided with a positioning ring frame corresponding to the outer wall of the wind turbine main shaft below the positioning groove. The positioning ring frame is coaxially arranged with the fixed bracket and the vertical chuck. The side of the positioning ring frame facing the wind turbine main shaft is arranged in an arc shape.

[0023] By adopting the above technical solution, the coaxially set positioning ring frame provides central auxiliary coaxial positioning for the wind turbine main shaft. The arc-shaped inner wall perfectly matches the outer wall of the shaft, forming a dual coaxial positioning system at the end and in the middle. The positioning ring frame can continuously constrain the radial displacement of the shaft, ensuring the coaxiality of the machining of the shaft through hole.

[0024] Optionally, a working platform is arranged around the outside of the fixed bracket, a guardrail is provided at the edge of the working platform, and a ladder is connected to the side wall of the working platform.

[0025] By adopting the above technical solution, the working platform surrounding the fixed support provides workers with a safe high-altitude operating position. The ladder and guardrail ensure the safety of working at height. Workers can easily operate the positioning components to complete the flange end positioning adjustment. Coaxial positioning and debugging can be completed without the need for external climbing equipment, improving clamping efficiency. At the same time, the safe operating environment can avoid the risk of spindle offset and tipping caused by debugging errors.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. A fixed bracket in the height direction is set above the vertical chuck, and a base is matched with the chuck jaws to realize the quick coaxial assembly of the positioning device and the vertical chuck. The positioning groove matches the wind turbine main shaft to realize the shaft insertion guide. The top positioning component is adapted to the large-diameter flange end to realize end limit. The support component supports the bottom of the flange end to form a stable support. The installation form of the shaft being inserted into the fixed bracket with the shaft facing down can constrain the lateral displacement of the large-diameter flange end. From the overall structure, it can prevent the wind turbine main shaft from shifting and tipping due to the high center of gravity and large overhang after reverse clamping, and ensure the coaxiality and processing safety of the shaft through hole. 2. The threaded drive between the rotating part and the support column enables the height of the support column to be adjustable, which can level the flange end of the wind turbine main shaft, correct the tilt deviation of the flange end when clamped in reverse, and ensure that the main shaft is in a horizontal and coaxial state. Precise leveling adjustment can make the flange end bear force evenly, avoid lateral displacement caused by uneven local force, and ensure the placement stability of the large-diameter flange end from the leveling support, providing a flat positioning reference for the machining of the shaft through hole. 3. The hollow structure of the fixed bracket reduces the overall weight and the load pressure on the vertical chuck. The obliquely supported sidewalls significantly improve the overall structural strength of the bracket, enabling it to withstand the heavy impact of large wind turbine main shafts. The fixed bracket is spaced apart from the bottom of the shaft, providing clearance for the shaft after reverse clamping, avoiding friction interference between the shaft and the bracket. At the same time, it allows the chips generated during the finishing of the wind turbine main shaft's through hole to fall directly from the original inner hole of the wind turbine main shaft, preventing the chips from accumulating in the inner hole. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a positioning device for forging processing. Figure 2 This is a partial sectional view of a positioning device for forging processing; Figure 3 This is a partial schematic diagram of the positioning components and support components of a positioning device for forging processing.

[0028] In the diagram, 1. Fixed bracket; 11. Positioning groove; 12. Base; 13. Positioning ring frame; 2. Vertical chuck; 3. Wind turbine main shaft; 4. Positioning assembly; 41. Positioning block; 411. Abutting protrusion; 42. Fixed seat; 43. Sliding seat; 44. Screw one; 441. Rotating handle one; 5. Support assembly; 51. Support column; 511. Sliding groove; 52. Fixed column; 521. Clearance groove; 53. Rotating part; 531. Threaded groove; 54. Sliding square rod; 6. Limiting abutting assembly; 61. Abutting part; 62. Support frame; 63. Screw two; 631. Rotating handle two; 64. Arc-shaped limiting plate; 7. Working platform; 71. Guardrail; 72. Ladder. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0030] A positioning device for forging processing, as shown in the reference. Figure 1 and Figure 2 The device includes a fixed bracket 1 mounted on top of the vertical chuck 2. A base 12 is welded to the bottom of the fixed bracket 1, and the base 12 directly engages with the jaws of the vertical chuck 2 to achieve coaxial assembly of the device and the vertical chuck 2. The fixed bracket 1, the base 12 and the vertical chuck 2 are always arranged coaxially. The fixed bracket 1 has a hollow internal structure, and the side walls adopt an oblique support form to improve the overall structural strength. The bottom of the fixed bracket 1 is spaced apart from the bottom of the wind turbine main shaft 3, leaving space for shaft installation and shaft through hole machining.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The top of the fixed bracket 1 has a positioning groove 11 that matches the shape of the wind turbine main shaft 3. The wind turbine main shaft 3 is inserted into the fixed bracket 1 with its shaft facing downwards, and its flange end is placed in the positioning groove 11 to complete the initial placement. The top of the fixed bracket 1 is provided with a support assembly 5, which includes a support column 51 that abuts against the bottom of the flange end of the wind turbine main shaft 3. The top of the fixed bracket 1 is fixed with a fixed column 52 by bolts. The support column 51 is slidably connected to the fixed column 52 along the height direction of the fixed bracket 1. The top of the fixed column 52 is connected to a rotatable rotating part 53 through a bearing. The threaded groove 531 in the rotating part 53 is connected to the threaded part on the outside of the support column 51 through a threaded structure. A sliding square rod 54 is installed in the clearance groove 521 inside the fixed column 52. The sliding square rod 54 is adapted to the sliding groove 511 at the bottom of the support column 51, which restricts the circumferential rotation of the support column 51 and only allows the support column 51 to make linear up and down movements along the height direction of the fixed bracket 1, thereby realizing the support and flatness adjustment of the bottom of the flange end of the wind turbine main shaft 3.

[0032] Reference Figure 1 , Figure 2 and Figure 3 A positioning component 4 is provided on the top of the fixed bracket 1 outside the positioning groove 11. The fixing seat 42 of the positioning component 4 is fixed to the fixed bracket 1 with bolts. A sliding seat 43 is provided on the fixing seat 42, which can slide radially along the flange end of the wind turbine main shaft 3. The sliding seat 43 and the screw 44 inside the fixing seat 42 are threadedly connected through a bearing. A rotating handle 441 is bolted to the outer end of the screw 44. A positioning block 41 is installed on the sliding seat 43. Multiple abutment protrusions 411 are provided on the side of the positioning block 41 facing the flange end. By rotating the handle 441, the screw 44 is driven to rotate, which can drive the sliding seat 43 and the positioning block 41 to move radially and press against the outer wall of the flange end of the wind turbine main shaft 3 to achieve precise end positioning.

[0033] Reference Figure 1 and Figure 2 The inner wall of the fixed bracket 1 is provided with a limiting abutment component 6. Multiple abutment parts 61 of the limiting abutment component 6 are evenly arranged around the wind turbine main shaft 3. The abutment parts 61 are connected to the inner wall of the fixed bracket 1 through multiple hinged support frames 62. The side wall of the fixed bracket 1 is threaded with a screw 63. The end of the screw 63 is rotatably connected to the abutment part 61. The outer end is provided with a rotating handle 631. An arc-shaped limiting plate 64 is installed on the side of the abutment part 61 near the wind turbine main shaft 3. By rotating the handle 631 to adjust the screw 63, the abutment part 61 can be driven to move radially, so that the arc-shaped limiting plate 64 abuts against the outer wall of the wind turbine main shaft 3, thereby achieving the abutment and limiting of the wind turbine main shaft 3.

[0034] Reference Figure 1 and Figure 2 A positioning ring frame 13 is installed inside the fixed bracket 1, below the positioning groove 11. The positioning ring frame 13 is coaxially arranged with the fixed bracket 1 and the vertical chuck 2. The inner side wall is arc-shaped and fits the outer wall of the wind turbine main shaft 3, providing auxiliary coaxial positioning for the shaft. A working platform 7 is arranged around the outside of the fixed bracket 1. A guardrail 71 is installed at the edge of the platform, and a ladder 72 is connected to the side wall, allowing workers to safely climb to complete the adjustment and inspection of the positioning component 4.

[0035] The implementation principle of this application embodiment is as follows: First, precisely engage the device base 12 with the jaws of the vertical chuck 2 to complete the coaxial assembly of the positioning device and the vertical chuck equipment, ensuring that the fixed bracket 1, base 12, and vertical chuck 2 form a unified coaxial reference. Then, using a large gantry crane, insert the wind turbine main shaft 3 into the fixed bracket 1 with the shaft facing downwards, placing the wind turbine main shaft 3 in the positioning groove 11 at the top of the fixed bracket 1, completing the initial placement of the wind turbine main shaft 3. Next, by rotating the rotating part 53 of the rotating support assembly 5, the threaded drive drives the support column 51 to move linearly up and down along the height direction of the fixed bracket 1, and the sliding square rod... 54. The support column 51 is rotated circumferentially to limit the rotation of the wind turbine main shaft 3. The support column 51 provides multi-point support and leveling to the bottom of the flange end of the wind turbine main shaft 3, quickly correcting the installation tilt of the flange end and keeping the wind turbine main shaft 3 in a horizontal and coaxial state. Then, the rotation handle 441 of the positioning component 4 is rotated to drive the screw 44 to rotate, which drives the sliding seat 43 and the positioning block 41 to move radially along the flange end of the wind turbine main shaft 3. The abutting protrusion 411 of the positioning block 41 tightly abuts against the outer wall of the flange end, completing the radial and precise positioning of the flange end and ensuring that the flange end is coaxial with the fixed bracket 1 and the vertical chuck 2. For the wind turbine main shaft 3, the rotating handle 631 of the rotation limit abutment component 6 drives the screw 63 to move the abutment part 61 radially. The hinged support frame 62 flexibly deforms with the abutment part 61 to adapt to the outer diameter of the shaft. The arc-shaped limit plate 64 fits against the outer wall of the shaft to complete the abutment limit, preventing the shaft from shaking or swaying during processing. The positioning ring frame 13 provides auxiliary coaxial positioning for the middle part of the shaft, forming a multi-position coaxial positioning system for the end, middle and shaft. After positioning, the vertical lathe can process the shaft through hole of the wind turbine main shaft 3. The device maintains the stable positioning and coaxial state of the wind turbine main shaft 3 throughout the process, preventing displacement, skewness and shaking during processing, and ensuring the processing accuracy and coaxiality of the shaft through hole.

[0036] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning device for forging processing, characterized in that: The system includes a fixed bracket (1) located above the vertical chuck (2) along the height direction. The fixed bracket (1) has a positioning groove (11) corresponding to the wind turbine main shaft (3) on its top. The fixed bracket (1) has a positioning component (4) corresponding to the flange end of the wind turbine main shaft (3) on its top. The wind turbine main shaft (3) is inserted into the fixed bracket (1) with its shaft facing downward. The fixed bracket (1) has a support component (5) on its top that contacts the bottom end of the wind turbine main shaft (3). The fixed bracket (1) has a base (12) at its bottom that engages with the claws of the vertical chuck (2). The fixed bracket (1), the base (12), and the vertical chuck (2) are coaxially arranged.

2. The positioning device for forging processing according to claim 1, characterized in that: The positioning component (4) includes several positioning blocks (41) that abut against the outer wall of the flange end of the wind turbine main shaft (3). The top of the fixed bracket (1) is provided with a fixed seat (42). The fixed seat (42) is slidably provided with a sliding seat (43) connected to the positioning block (41) along the radial direction of the flange end of the wind turbine main shaft (3). A screw rod (44) that is threadedly connected to the sliding seat (43) is rotatably provided inside the fixed seat (42). A rotating handle (441) that is connected to the screw rod (44) is provided on the outside of the fixed seat (42).

3. A positioning device for forging processing according to claim 2, characterized in that: The positioning block (41) has several abutting protrusions (411) on the side facing the flange end of the wind turbine main shaft (3); the support assembly (5) includes a support column (51) disposed on the top of the fixed bracket (1) and abutting the bottom of the flange end of the wind turbine main shaft (3), the top of the support column (51) being higher than the height of the fixed seat (42) and the sliding seat (43).

4. A positioning device for forging processing according to claim 3, characterized in that: The fixed bracket (1) is provided with a fixed column (52) at the top. The support column (51) is slidably connected to the fixed column (52) along the height direction of the fixed bracket (1). The outer wall of the support column (51) is threaded. The top of the fixed column (52) is rotatably provided with a rotating part (53). The rotating part (53) is provided with a threaded groove (531) that is threadedly connected to the outer wall of the support column (51).

5. A positioning device for forging processing according to claim 4, characterized in that: The fixed column (52) has a relief groove (521) corresponding to the support column (51) along its height direction. A sliding square rod (54) is provided in the relief groove (521) along its height direction. A sliding groove (511) adapted to the sliding square rod (54) is provided at the bottom of the support column (51) along its height direction.

6. A positioning device for forging processing according to claim 4, characterized in that: The fixed bracket (1) is hollow inside, and the side wall of the fixed bracket (1) is obliquely supported. The bottom of the fixed bracket (1) is spaced apart from the bottom of the wind turbine main shaft (3).

7. A positioning device for forging processing according to claim 6, characterized in that: The inner wall of the fixed bracket (1) is provided with a limiting abutment component (6) that abuts against the outer wall of the wind turbine main shaft (3). The limiting abutment component (6) includes several abutment parts (61) arranged around the wind turbine main shaft (3). The abutment parts (61) are provided with a support frame (62) connected to the inner wall of the fixed bracket (1).

8. A positioning device for forging processing according to claim 7, characterized in that: The support frame (62) is hinged to multiple rods and the end of the support frame (62) is hinged to the abutment part (61) and the inner wall of the fixed bracket (1). The side wall of the fixed bracket (1) is threaded with a screw rod (63). The end of the screw rod (63) is rotatably connected to the abutment part (61). The end of the screw rod (63) is provided with a rotating handle (631). An arc-shaped limiting plate (64) is provided on the side of the abutment part (61) near the shaft of the wind turbine main shaft (3).

9. A positioning device for forging processing according to claim 8, characterized in that: The fixed bracket (1) is provided with a positioning ring frame (13) corresponding to the outer wall of the wind turbine main shaft (3) below the positioning groove (11). The positioning ring frame (13) is coaxially arranged with the fixed bracket (1) and the vertical chuck (2). The positioning ring frame (13) is arranged in an arc shape on the side facing the wind turbine main shaft (3).

10. A positioning device for forging processing according to claim 9, characterized in that: The fixed bracket (1) is surrounded by a working platform (7), the edge of the working platform (7) is provided with a guardrail (71), and the side wall of the working platform (7) is connected to a ladder (72).

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