Locking device and locking method for bearing outer ring gland nut locking plate

Abstract

The invention discloses a bearing outer ring gland nut locking piece locking device and a locking method, and belongs to the technical field of aero-engine assembly.The bearing outer ring gland nut locking piece locking device comprises a first locking assembly, and the first locking assembly comprises a first mounting base used for being fixed to a to-be-machined part and a hook plate arranged on the first mounting base; a hook tip part which is used for extending into a gap between a bearing outer ring pressing nut locking plate and a bearing is formed on the hook plate; and the hook plate is in sliding fit with the first mounting seat, so that the hook plate moves in the axial direction of the to-be-machined part, and the hook tip part is driven to hook the inner teeth of the bearing outer ring gland nut locking plate, so that the inner teeth of the bearing outer ring gland nut locking plate are bent. Direct contact and scraping to the surfaces of the bearing and the nut in the process of hooking the inner teeth of the locking plate can be reduced, and the bearing and the nut are effectively protected.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine assembly, and in particular to a bearing outer ring compression nut locking piece locking device and a locking method. Background Art

[0002] The output shaft assembly of an aircraft engine is a key part that connects the various components inside the engine. It plays an important role in transmitting power, reducing vibration, and reducing axial load. A double inner half-ring angular contact ball bearing is installed on the output shaft of a certain type of engine. After the bearing is assembled, the inner and outer rings need to be limited to prevent axial movement. Usually, a nut is used to tighten it, and a locking plate is used for insurance to prevent the nut from loosening.

[0003] During the assembly process of this part, the bearing is first installed on the output shaft journal with interference fit and pressed as the first part; then the small end of the first part is passed through the bearing seat, the outer ring of the bearing is assembled to the matching inner hole of the bearing seat, and then the lock plate and nut are installed in sequence, the nut is tightened to press the outer ring of the bearing, and the lock plate is bent for security. Since the lock plate security position of this part is in the cavity formed by the output shaft and the inner hole of the bearing seat, the space is small and difficult to operate. The traditional method is to use a flat head to lift and bend it, which is very easy to scratch the bearing and nut. Summary of the invention

[0004] The invention provides a bearing outer ring compression nut locking piece locking device and a locking method, so as to solve the technical problem that the bearing and the nut are easily damaged when the bearing locking piece is bent.

[0005] According to one aspect of the present invention, a bearing outer ring clamping nut locking plate locking device and a locking method are provided, comprising a first locking assembly, the first locking assembly comprising a first mounting seat for fixing on a part to be processed and a hook plate arranged on the first mounting seat, the hook plate being formed with a hook tip for extending into a gap between the bearing outer ring clamping nut locking plate and the bearing; the hook plate and the first mounting seat are slidably engaged to enable the hook plate to move axially along the part to be processed, so as to drive the hook tip to hook up the inner teeth of the bearing outer ring clamping nut locking plate to bend the inner teeth of the bearing outer ring clamping nut locking plate.

[0006] Optionally, a first connecting column is arranged at one end of the hook plate away from the hook tip along the axial direction of the part to be processed, a first sliding groove is arranged on the first mounting seat, the first connecting column slides through the first sliding groove, a polygonal anti-rotation structure with an outer contour is formed on the first connecting column or the hook plate, and an anti-rotation groove cooperating with the polygonal anti-rotation structure is arranged on the first mounting seat.

[0007] Optionally, a first screw driving structure is provided on the first mounting seat, and the first screw driving structure converts the input circumferential rotational power into a force that drives the hook plate to move axially along the part to be processed.

[0008] Optionally, the first screw drive structure includes a first rotating seat, the first rotating seat is threadedly matched with the first connecting column, and the bottom of the first rotating seat abuts against the first mounting seat to limit the axial movement of the rotating seat.

[0009] Optionally, a set screw is threadedly connected to the first mounting seat, and the set screw is radially arranged along the first connecting column. The set screw is pressed against the side wall of the first connecting column to limit the radial movement of the first connecting column.

[0010] Optionally, the bearing outer ring clamping nut lock plate locking device also includes a second locking assembly, the second locking assembly includes a second mounting seat for fixing on the part to be processed and a claw arranged on the second mounting seat; the claw and the second locking assembly are slidably cooperated to make the claw move radially along the part to be processed, so as to drive the claw to squeeze the inner teeth of the bearing outer ring clamping nut lock plate to bend the inner teeth of the bearing outer ring clamping nut lock plate.

[0011] Optionally, a second screw driving structure is provided on the second mounting seat, and the second screw driving structure converts the input circumferential rotational power into a force that drives the clamping claws to move radially along the part to be processed.

[0012] Optionally, a second slide groove is radially provided on the second mounting seat, a second connecting column is axially provided on the clamping claw along the workpiece to be processed, and the second connecting seat slides in the second slide groove.

[0013] Optionally, the second screw driving structure includes a hinge bolt, one end of which is sleeved on the second connecting column, and the other end of the hinge bolt passes through the second connecting seat and is threadedly connected to the second rotating seat.

[0014] Optionally, an arc-shaped mounting groove is formed on the first mounting seat and / or the second mounting seat, and a locking bolt for lockingly cooperating with a part to be processed is passed through the arc-shaped mounting groove.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. By setting the first locking component, the hook tip is used to specifically extend into the gap between the inner teeth of the lock plate and the bearing, and the rotational torque is converted into axial movement force through threaded transmission, thereby avoiding direct contact and scratching of the bearing and nut surfaces by traditional tools such as a flat-blade screwdriver or a knocking tool. At the same time, the limit screw, anti-rotation groove and slide groove structure ensure that the moving direction and angle of the hook plate are accurate, thereby preventing damage to parts due to operational deviation. In the process of hooking up the inner teeth of the lock plate, force is only applied to a specific part of the lock plate, and the lock plate is bent by a gradual deformation method, thereby avoiding the impact of a one-time strong operation on surrounding parts. The force in the entire process is precisely controllable, and the bearing and nut are effectively protected, thereby solving the technical problem that the bearing and nut are easily damaged when the bearing lock plate is bent.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the cooperation between the first locking assembly of the present invention and the part to be processed;

[0020] Figure 2 It is a structural schematic diagram of the first locking assembly of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the hook plate of the present invention;

[0022] Figure 4 It is a schematic diagram of the cooperation between the second locking assembly of the present invention and the part to be processed;

[0023] Figure 5 is a schematic structural diagram of the second locking assembly of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the clamping claw of the present invention.

[0025] Legend:

[0026] 1. Parts to be processed; 2. First locking assembly; 21. First mounting seat; 22. Hook plate; 23. First connecting column; 24. First slide groove; 3. First rotating seat; 4. Set screw; 5. Second locking assembly; 51. Second mounting seat; 52. Clamping claw; 53. Second slide groove; 54. Second connecting column; 6. Articulated bolt; 7. Second rotating seat; 8. Arc-shaped mounting groove. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] The following is combined with Figure 1-6 This application is described in further detail.

[0029] The embodiments of the present application disclose a bearing outer ring compression nut locking plate locking device and a locking method.

[0030] Reference Figure 1, a bearing outer ring clamping nut locking plate locking device and locking method, including a first locking component 2, the first locking component 2 including a first mounting seat 21 for fixing on a part to be processed 1 and a hook plate 22 arranged on the first mounting seat 21, a hook tip portion for extending into a gap between the bearing outer ring clamping nut locking plate and the bearing is formed on the hook plate 22; the hook plate 22 and the first mounting seat 21 are slidably matched to make the hook plate 22 move axially along the part to be processed 1, so as to drive the hook tip portion to hook up the inner teeth of the bearing outer ring clamping nut locking plate to bend the inner teeth of the bearing outer ring clamping nut locking plate. The first mounting seat 21 is used to be fixed on the workpiece 1 to be processed, serving as the base of the entire device, providing a stable mounting support, and cooperates with the hook plate 22 through the slide groove, so that the hook plate 22 can accurately slide along the axial direction of the workpiece 1 to be processed; the hook plate 22 is designed with a hook tip portion, which is used to extend into the gap between the locking plate of the bearing outer ring compression nut and the bearing, and the hooking action of the inner teeth of the locking plate is realized through the precise positioning of the hook tip portion, and the sliding matching structure limits the moving direction of the hook plate 22 by guiding, ensuring that the action of the hook tip portion is concentrated on a specific position of the inner teeth of the locking plate, thereby realizing Local deformation; during the operation, the operator pushes the hook plate 22 to move axially by rotating the threaded transmission system, so that the hook tip applies force to the inner teeth of the locking plate, gradually bending and deforming it, and the sliding path and force direction of the hook plate 22 are strictly controlled by the slide groove and limiting structure of the first mounting seat 21 to avoid force deviation or dispersion. At the same time, the first mounting seat 21 is fixedly connected to the part 1 to be processed by fasteners to provide overall stability, thereby ensuring that the device and the workpiece are closely matched, safe and reliable during operation, and ultimately achieving precise locking operation of the locking plate.

[0031] Reference Figure 2 and Figure 3In order to facilitate the control of the hook plate 22, a first connecting column 23 is provided at one end of the hook plate 22 away from the hook tip along the axial direction of the part 1 to be processed, and a first slide groove 24 is provided on the first mounting seat 21. The first connecting column 23 is slidably inserted into the first slide groove 24. A polygonal anti-rotation structure with an outer contour is formed on the first connecting column 23 or the hook plate 22, and an anti-rotation groove that cooperates with the polygonal anti-rotation structure is provided on the first mounting seat 21. The device is designed with a first connecting column 23 that is arranged along the axial direction of the part 1 to be processed. The first connecting column 23 is located at one end of the hook plate 22 away from the hook tip, and is used to guide and transmit force by cooperating with the overall structure of the hook plate 22. The first connecting column 23 passes through the first slide groove 24 provided on the first mounting seat 21. The design of the slide groove ensures that the hook plate 22 can achieve controlled sliding along the axial direction to avoid affecting the working accuracy due to position offset. The outer contour of the first connecting column 23 is designed as a polygonal anti-rotation structure, which is used in conjunction with the matching anti-rotation groove on the first mounting seat 21 to prevent the hook plate 22 from rotating during the force application process, ensuring that the action direction of the hook plate 22 always remains along the axial direction. This structural design achieves precise control of the hook plate 22, and at the same time, in all actions between the hook plate 22 and the workpiece 1 to be processed, the direction is always consistent and the force distribution is uniform, thereby improving the reliability and safety of the entire locking operation.

[0032] Furthermore, in order to accurately control the moving distance of the hook plate 22, a first screw driving structure is provided on the first mounting seat 21, and the first screw driving structure converts the input circumferential rotational power into a force driving the hook plate 22 to move axially along the workpiece 1 to be processed.

[0033] The first screw drive structure includes a first rotating seat 3, which is threadedly matched with the first connecting column 23, and the bottom of the first rotating seat 3 abuts against the first mounting seat 21 to limit the axial movement of the rotating seat. The core components of the screw drive structure are the first screw and the first rotating seat 3 connected by thread. The first rotating seat 3 is threadedly matched with the first connecting column 23 of the hook plate 22. By rotating the first screw, the rotating seat can be driven to move forward or backward accurately along the axial direction, thereby driving the hook plate 22 to slide in a controlled manner in the slide groove. This screw drive design has a high-precision displacement control capability, and can accurately adjust the travel of the hook plate 22 by the rotation angle, ensuring that the hook tip only acts on the specific position and depth of the inner teeth of the locking plate without generating excess displacement or excessive force. The first screw drive structure includes a first rotating seat 3, which is threadedly matched with the first connecting column 23, and the bottom of the first rotating seat 3 abuts against the first mounting seat 21 to limit the axial movement of the rotating seat.

[0034] Specifically, a set screw 4 is threadedly connected to the first mounting seat 21, and the set screw 4 is arranged along the radial direction of the first connecting column 23. The set screw 4 is pressed against the side wall of the first connecting column 23 to limit the radial movement of the first connecting column 23. The set screw 4 is arranged along the radial direction of the first connecting column 23, and its end is directly pressed against the side wall of the first connecting column 23, so as to achieve a stable fixing effect on the connecting column through radial pressure. The core function of this structure is to prevent the radial displacement of the first connecting column 23 caused by the force during the operation of the hook plate 22, so as to ensure that the hook plate 22 always performs accurate linear movement along the axial direction of the slide groove. This design effectively enhances the movement accuracy of the hook plate 22, and the adjustability of the set screw 4 allows the operator to flexibly adjust the fixing force of the connecting column according to actual needs, thereby improving the adaptability and reliability of the device. In addition, this radial restriction structure can not only maintain the smooth sliding fit between the hook plate 22 and the first mounting seat 21, but also further avoid assembly errors or damage to the workpiece caused by the radial displacement of the connecting column, and finally ensure the accuracy and safety of the locking plate bending operation.

[0035] Reference Figure 4 After using the first locking component 2 to bend the inner teeth of the locking plate, the inner teeth of the locking plate cannot completely fit the surface of the nut side wall. Therefore, the bearing outer ring clamping nut locking plate locking device also includes a second locking component 5, and the second locking component 5 includes a second mounting seat 51 for fixing on the part to be processed 1 and a claw 52 arranged on the second mounting seat 51; the claw 52 and the second locking component 5 are slidably matched to make the claw 52 move along the radial direction of the part to be processed 1, so as to drive the claw 52 to squeeze the inner teeth of the locking plate of the bearing outer ring clamping nut to bend the inner teeth of the locking plate of the bearing outer ring clamping nut. The component includes a second mounting seat 51 fixed on the part to be processed 1 and a claw 52 arranged on the second mounting seat 51. The second mounting seat 51 serves as a supporting structure of the component. It is firmly connected to the part to be processed 1 by bolts, providing a stable foundation for the movement of the claw 52. A radial groove is designed on the mounting seat so that the claw 52 can slide smoothly in the radial direction. The claw 52 serves as an actuator, and its end is specially designed to be an extrusion surface adapted to the shape of the inner teeth of the locking plate for precise contact and action on the inner teeth. The claw 52 cooperates with the groove to achieve movement through a screw drive. The operator rotates the screw, and the threaded structure converts the rotational power into a linear movement of the claw 52 in the radial direction, driving the claw 52 to align with the inner teeth of the locking plate and apply radial pressure, so that the inner teeth of the locking plate are further bent until they are completely fitted to the side wall of the nut. The second mounting seat 51 and the groove ensure that the movement direction and force position of the claw 52 are accurate and stable.

[0036] Reference Figure 5 and Figure 6In order to facilitate the precise control of the clamping jaw 52, ​​a second screw driving structure is provided on the second mounting seat 51. The second screw driving structure converts the input circumferential rotational power into a force that drives the clamping jaw 52 to move radially along the part 1 to be processed. The input circumferential rotational power is precisely converted into a radial linear movement force of the clamping jaw 52 by working together. The second mounting seat 51 is fixed on the part 1 to be processed to provide a stable support for the entire driving structure. A radial slide groove is designed thereon to limit the moving direction of the clamping jaw 52 and ensure the stability of its movement. The second screw cooperates with the second rotating seat 7 through a threaded connection. When the operator rotates the screw, the thread drives the second rotating seat 7 to slide radially. The second rotating seat 7 is connected to the clamping jaw 52 and transmits the rotational power to the clamping jaw 52 through threaded transmission, thereby pushing the clamping jaw 52 to move radially along the slide groove. The end of the clamping jaw 52 is designed to engage with a locking plate. The extrusion surface matches the shape of the inner teeth. When the claw 52 moves, its end applies precise radial pressure to the inner teeth of the locking plate, further bending the inner teeth and making it fully fit with the side wall of the nut. At the same time, the slide groove of the second mounting seat 51 limits the movement direction of the claw 52, ​​avoiding position deviation during radial movement, ensuring uniform force and accurate action point. The overall design of the second screw drive structure makes the operation process more efficient and controllable, and can accurately control the movement distance and action force of the claw 52 by adjusting the rotation angle of the screw, thereby greatly improving the assembly quality and locking effect, while avoiding assembly errors or parts damage that may be caused by traditional methods.

[0037] A second slide groove 53 is radially provided on the second mounting seat 51, a second connecting column 54 is axially provided on the claw 52 along the workpiece 1 to be processed, and the second connecting seat slides in the second slide groove 53. The function of the slide groove is to provide precise guidance and restriction for the radial movement of the claw 52, ​​to ensure that the claw 52 always slides smoothly in the radial direction without deviation during operation, thereby ensuring that the force of the claw 52 is concentrated and the direction is accurate; a second connecting column 54 is axially provided on the claw 52 along the workpiece 1 to be processed, the second connecting column 54 is integrally connected to the claw 52, ​​and its function is to combine the movement of the claw 52 with the driving force transmission structure, and at the same time realize the controlled movement of the claw 52 by sliding in the second slide groove 53, the size and shape of the second slide groove 53 are precisely designed to match the shape and size of the second connecting column 54, to ensure that the connecting column is in the slide groove It only moves radially without tilting or rotating. The cooperation of the slide groove and the connecting column not only provides stable support for the movement of the claw 52, ​​but also prevents assembly errors caused by radial deviation during the force application process; the second mounting seat 51 serves as the supporting structure of the entire second locking assembly 5. Through its fixing method, the assembly is stabilized on the part to be processed 1, providing a reliable basis for the sliding and radial force application of the claw 52. At the same time, the setting of the second connecting column 54 enables the claw 52 to be connected to the second screw drive structure, and the connecting column is pushed to move in the slide groove through the screw drive, thereby driving the claw 52 to apply force to the inner teeth of the locking plate in the radial direction, thereby completing the further bending and fitting of the locking plate.

[0038] Specifically, the second screw driving structure includes a hinge bolt 6 , one end of which is sleeved on the second connecting column 54 , and the other end of the hinge bolt 6 passes through the second connecting seat and is threadedly connected to the second rotating seat 7 . The driving force is directly applied to the connecting column by means of a sleeve, thereby driving the claw 52 to slide radially. The other end of the hinged bolt 6 passes through the second connecting seat and is threadedly connected to the second rotating seat 7. The second rotating seat 7 serves as a bearing component for the input of rotational power. Through the rotation of the operator, the threaded transmission converts the circumferential rotational force into a radial linear movement force of the hinged bolt 6. The setting of the hinged bolt 6 allows it to flexibly adjust its position within a certain range to adapt to assembly tolerances or different parts to be processed 1, ensuring that the force transmission during the driving process is smooth and without jamming; the second connecting seat is fixed on the second mounting seat 51 and provides stable support, on which the hinged bolt 6 is passed and maintains a sliding fit with it, ensuring that the hinged bolt 6 can achieve linear motion during the force application process. At the same time, the second connecting seat maintains the stability and accuracy of the entire structure through the overall fit with the second slide groove 53 and the mounting seat. Through the mutual fit of the above-mentioned components, the second screw drive structure realizes the power conversion from rotation to linear and accurately controls the radial motion of the claw 52.

[0039] An arc-shaped mounting groove 8 is formed on the first mounting seat 21 and / or the second mounting seat 51 , and a locking bolt for locking with the workpiece 1 to be processed is passed through the arc-shaped mounting groove 8 . The arc-shaped design enables the mounting seat to adjust its position and angle within a certain range to adapt to different sizes of the part 1 to be processed and the installation position of the locking piece, thereby improving the applicability and versatility of the device. The locking bolt inserted in the mounting groove is an important connecting member between the fixing device and the part 1 to be processed. The locking bolt passes through the mounting groove and is fastened with the reserved hole or flange thread on the part 1 to be processed to achieve a reliable connection between the mounting seat and the processed part. The design of the arc-shaped groove allows the locking bolt to move along an arc-shaped path in the mounting groove, so that the mounting seat can be accurately adjusted and positioned according to the specific position of the locking piece or nut, ensuring that the working parts of the device, such as the hook plate 22 or the claw 52, ​​can be aligned with the inner and outer teeth of the locking piece for operation. At the same time, the adjusted mounting seat is firmly fixed on the processed part through the tightening action of the locking bolt, ensuring the stability and working accuracy of the device. The design makes the entire device more flexible and adaptable through the cooperation of the arc-shaped groove and the locking bolt, which can not only ensure the precise alignment of each component, but also maintain the stable connection between the device and the processed part during operation, thereby effectively improving the assembly efficiency and locking quality.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The bearing outer ring compression nut locking plate locking device is characterized by: The invention comprises a first locking assembly (2), the first locking assembly (2) comprising a first mounting seat (21) for fixing on a part to be processed (1) and a hook plate (22) arranged on the first mounting seat (21), the hook plate (22) being formed with a hook tip portion for extending into a gap between a locking plate of a bearing outer ring compression nut and the bearing; The hook plate (22) and the first mounting seat (21) are slidably matched to enable the hook plate (22) to move axially along the part to be processed (1), so as to drive the hook tip to hook up the inner teeth of the bearing outer ring clamping nut locking plate and bend the inner teeth of the bearing outer ring clamping nut locking plate.

2. The bearing outer ring compression nut locking plate locking device according to claim 1, characterized in that: A first connecting column (23) is provided at one end of the hook plate (22) away from the hook tip along the axial direction of the workpiece (1) to be processed, and a first sliding groove (24) is provided on the first mounting seat (21). The first connecting column (23) is slidably inserted into the first sliding groove (24). A polygonal anti-rotation structure is formed on the first connecting column (23) or the hook plate (22), and an anti-rotation groove cooperating with the polygonal anti-rotation structure is provided on the first mounting seat (21).

3. The bearing outer ring compression nut locking plate locking device according to claim 2, characterized in that: The first mounting seat (21) is provided with a first screw driving structure, which converts the input circumferential rotational power into a force that drives the hook plate (22) to move axially along the part (1) to be processed.

4. The bearing outer ring compression nut locking piece locking device according to claim 3 is characterized in that: The first screw drive structure comprises a first rotating seat (3), the first rotating seat (3) is threadedly matched with the first connecting column (23), and the bottom of the first rotating seat (3) abuts against the first mounting seat (21) to limit the axial movement of the rotating seat.

5. The bearing outer ring compression nut locking plate locking device according to claim 2, characterized in that: A set screw (4) is threadedly connected to the first mounting seat (21), and the set screw (4) is radially arranged along the first connecting column (23). The set screw (4) is pressed against the side wall of the first connecting column (23) to limit the radial movement of the first connecting column (23).

6. The bearing outer ring compression nut locking plate locking device according to claim 1, characterized in that: The bearing outer ring compression nut locking plate locking device further comprises a second locking assembly (5), the second locking assembly (5) comprising a second mounting seat (51) for fixing on the part to be processed (1) and a claw (52) arranged on the second mounting seat (51); The clamping claw (52) and the second locking assembly (5) are slidably matched to enable the clamping claw (52) to move radially along the part to be processed (1), thereby driving the clamping claw (52) to squeeze the inner teeth of the bearing outer ring clamping nut locking plate to bend the inner teeth of the bearing outer ring clamping nut locking plate.

7. The bearing outer ring compression nut locking piece locking device and locking method according to claim 6, characterized in that: The second mounting seat (51) is provided with a second screw driving structure, which converts the input circumferential rotational power into a force that drives the clamping claw (52) to move radially along the part (1) to be processed.

8. The bearing outer ring compression nut locking piece locking device and locking method according to claim 7, characterized in that: A second slide groove (53) is radially provided on the second mounting seat (51), a second connecting column (54) is axially provided on the clamping claw (52) along the workpiece (1) to be processed, and the second connecting seat slides in the second slide groove (53).

9. The bearing outer ring compression nut locking piece locking device and locking method according to claim 8, characterized in that: The second screw drive structure comprises a hinge bolt (6), one end of which is sleeved on the second connecting column (54), and the other end of which passes through the second connecting seat and is threadedly connected to the second rotating seat (7).

10. The bearing outer ring compression nut locking piece locking device and locking method according to claim 1 or 6, characterized in that: The first mounting seat (21) and / or the second mounting seat (51) is provided with an arc-shaped mounting groove (8), and a locking bolt for locking with the part to be processed (1) is passed through the arc-shaped mounting groove (8).

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