A universal fixture and method for machining large and medium-sized housings

Abstract

The application discloses a universal clamp and method for large and medium-sized shell machining, and the universal clamp comprises a base, a mounting seat fixedly arranged on the base, and a sliding rail fixedly arranged on the base, wherein a jaw base is slidably arranged on the sliding rail, a V-shaped tooth is arranged at a large end of the jaw base, an arc-shaped tooth is arranged at a small end of the jaw base, a jaw is arranged on the V-shaped tooth, an automatic pressing unit is arranged on the jaw, a self-locking unit is arranged on the mounting seat, an end gear disc is tightly arranged between the self-locking unit and the mounting seat, a pushing blade is arranged at a lower end of the end gear disc, and the pushing blade is engaged with the arc-shaped tooth. The clamp has high universality and can be adapted to different shell machining. The clamp has a reasonable structure design, can expand a machining space and improve efficiency. The automatic pressing unit can ensure uniform clamping force and reduce deformation. The self-locking unit can stabilize a clamping state and inhibit vibration. High-precision positioning is realized, and the clamp can be quickly disassembled, so that the flexible production demand is met. The clamping method can improve the machining efficiency of parts in the same batch.

Description

Technical Field

[0001] This invention relates to a general-purpose fixture and method for machining large and medium-sized shells. Background Technology

[0002] In the aerospace field, shell components are widely used in various aircraft and spacecraft due to their lightweight and high strength. The machining of these components is mainly carried out by turning and milling processes. However, due to their large size (usually with a diameter of over 800 mm), thin walls (wall thickness is mostly less than 5 mm), and relatively weak overall rigidity, the rationality of the clamping process directly determines the machining quality of the workpiece. An unreasonable clamping method can easily cause clamping deformation and machining chatter, leading to loss of part precision or even scrapping.

[0003] Existing clamping technologies have many shortcomings:

[0004] Limitations of dedicated tooling: While dedicated tooling customized for specific housings can guarantee clamping accuracy to a certain extent, the design cycle is as long as 2-3 months, the manufacturing cost of a single set is often more than 100,000 yuan, and it can only be adapted to a single model of part. It cannot meet the production needs of multiple varieties and small batches (1-5 pieces per batch) in the aerospace field, resulting in a high idle rate of tooling and serious waste of resources.

[0005] The inherent defects of traditional chucks: Three-jaw and four-jaw chucks adopt a single-point clamping mode, which requires at least 15% of the part to be reserved for special clamping surface, which greatly compresses the effective machining space and makes it difficult to achieve multi-station integrated machining; more importantly, its clamping force distribution is extremely uneven (radial error can reach ±30N), which can easily cause warping deformation of 0.1-0.3mm for thin-walled shells, resulting in a product qualification rate of only about 70%.

[0006] Therefore, developing a large and medium-sized shell clamping system that combines strong versatility, uniform clamping, excellent anti-flutter performance, and quick operation has become a key technological requirement for breaking through the bottleneck of high-end aerospace manufacturing. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a universal fixture and method for machining large and medium-sized shells. It aims to solve problems such as poor versatility, limited machining space, uneven clamping force distribution, easy deformation of parts, low machining efficiency, and difficulty in meeting the needs of flexible production in existing shell part clamping methods.

[0008] To achieve the above objectives, the present invention employs the following technical solutions:

[0009] A general-purpose fixture for machining large and medium-sized shells, the fixture includes a base (1), a mounting seat (11) fixedly disposed at the center of the base (1), and a plurality of slide rails (12) fixedly disposed on the upper end of the base (1), the slide rails (12) being evenly distributed along the circumference of the base (1). Each slide rail (12) has a slidable jaw base (2) at its upper end, the jaw base (2) having a V-shaped tooth (21) at its larger end. The base (2) has an arc-shaped tooth (22) at its small end. A pawl (3) is installed on the V-shaped tooth (21). An automatic clamping unit (4) is installed on the pawl (3). A self-locking unit (5) is installed on the mounting base (11). An end gear disk (6) is tightly fastened between the self-locking unit (5) and the mounting base (11). A pusher blade (61) is provided at the lower end of the end gear disk (6). The pusher blade (61) meshes with the arc-shaped tooth (22).

[0010] As a preferred embodiment, the automatic clamping unit (4) includes a movable pressure plate positioning screw (41), which is threadedly connected to the claw (3). The movable pressure plate positioning screw (41) is fitted with a movable pressure plate (42), a support spring (43), and an adjusting nut (47) from top to bottom. An adjustable wedge (44) is tightly fastened to the upper end of the base (1). A movable pressure plate support screw (45) passes through the branch of the movable pressure plate (42). One end of the movable pressure plate support screw (45) abuts against the inclined surface of the adjustable wedge (44), and the other end is threadedly connected to a locking nut (46) that abuts against the movable pressure plate (42).

[0011] In a further preferred embodiment, a movable pressure plate limiting rod (48) is provided between the claw (3) and the movable pressure plate (42).

[0012] Further preferably, the contact surfaces of the movable pressure plate positioning screw (41) and the movable pressure plate (42) are both set as spherical surfaces, and one end of the movable pressure plate support screw (45) is set as a spherical surface.

[0013] As a preferred embodiment, the self-locking unit (5) includes a stop plate (51), which is movably disposed inside the mounting base (11). A stop plate return spring (52) is provided between the stop plate (51) and the mounting base (11). A helical gear plate (62) is provided at the lower end of the end gear plate (6), and a matching helical tooth is provided at the upper end of the stop plate (51). A wrench adapter (53) passing through the end gear plate (6) is abutted in the middle of the stop plate (51). An internal hexagon screw (54) is threadedly connected to the mounting base (11) of the wrench adapter (53), and a wrench adapter return spring (55) is sleeved on the shank of the internal hexagon screw (54).

[0014] Further preferably, an adjusting nut (56) is provided between the wrench adapter (53) and the mounting base (11) to abut against the end gear disc (6), and the adjusting nut (56) is threadedly connected to the side wall of the mounting base (11).

[0015] As a preferred embodiment, the universal clamp is equipped with a dedicated hex wrench (7), which has a clearance groove that matches the hexagonal screw (9).

[0016] As a preferred method

[0017] S1. Select appropriate chucks (3) according to the size and structure of the shell to be processed and install them on the chuck base (2) through V-shaped teeth (21).

[0018] S2. Place the housing to be processed in a suitable position so that the hex wrench (7) is put into the wrench adapter (53) and a downward force is applied to unlock the self-locking unit (5). Then, rotate the wrench adapter (53) by the hex wrench (7) to drive the end gear disk (6) to rotate. Since the pusher blade (61) meshes with the arc tooth (22), it drives the pawl base (2) to slide along the slide rail (12) to realize the movement of the pawl (3) and finally realize the self-centering positioning of the housing.

[0019] S3. Adjust the relative position of the adjustable wedge (44) on the base (1) so that the inclined surface of the adjustable wedge (44) is directly below the branch of the movable pressure plate (42). Then continuously adjust the movable pressure plate support screw (45) and the movable pressure plate positioning screw (41) to achieve the appropriate clamping position. Finally, use the locking nut (46) and the adjusting nut (47) to fasten the movable pressure plate (42) on the movable pressure plate support screw (45) and the movable pressure plate positioning screw (41), thereby applying axial pressure to the workpiece and completing the clamping operation of the first workpiece.

[0020] S4. After the first workpiece is processed, operate the hex wrench (7) and put it into the wrench adapter (53). This operation is roughly the same as S2, except that the rotation direction is reversed. After the chuck (3) and the movable pressure plate (42) are separated from the workpiece, the workpiece can be removed.

[0021] S5. Repeat S2 and S4 continuously, without executing S3, to complete the processing of the same batch of parts.

[0022] Beneficial effects of this invention:

[0023] I. The universal fixture of the present invention is versatile and can adapt to the processing of large and medium-sized shell parts with different structures and sizes. It eliminates the need to design special tooling for each part, greatly shortens the tooling design cycle, reduces capital investment, and meets the production needs of multiple varieties and small batches in the aerospace field.

[0024] Second, through its reasonable structural design, this fixture eliminates the need for a large clamping surface, effectively expanding the processing space for the product, facilitating multi-station clamping, and improving production efficiency.

[0025] Third, the automatic clamping unit ensures that the clamping force is evenly distributed, avoiding deformation problems such as warping and indentation of the product, guaranteeing the dimensional accuracy and surface quality of the product, and improving the product qualification rate.

[0026] Fourth, the self-locking unit ensures that the fixture maintains a stable clamping state during operation, effectively suppressing chatter during machining, ensuring that the surface roughness meets requirements, and reducing tool wear.

[0027] Fifth, the entire fixture achieves high-precision positioning and is quick to disassemble, meeting the needs of flexible production and effectively solving the problems of existing clamping solutions in terms of product deformation control and clamping efficiency, thereby improving product quality and production efficiency.

[0028] VI. The clamping method allows for batch processing without repeated adjustments after the first piece is debugged, greatly improving the processing efficiency of the same batch of parts and meeting the cycle time requirements of flexible production. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a general-purpose fixture structure used for machining large and medium-sized shells.

[0030] Figure 2 This is a schematic diagram of the structure of a general-purpose fixture used for machining large and medium-sized shells after clamping the workpiece.

[0031] Figure 3 This is a cross-sectional view of a general-purpose fixture used for machining large and medium-sized shells.

[0032] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0033] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0034] Figure 6 This is a schematic diagram of the base structure of a general-purpose fixture used for machining large and medium-sized shells.

[0035] Figure 7This is a schematic diagram of the stop disc and end gear disc structure of a general-purpose fixture used for machining large and medium-sized shells.

[0036] Figure 8 This is a schematic diagram of the jaw base and jaw structure of a general-purpose fixture used for machining large and medium-sized shells.

[0037] Figure 9 This is a schematic diagram of the movable pressure plate and movable pressure plate positioning screw structure of a general-purpose fixture used for machining large and medium-sized shells.

[0038] Figure 10 This is a schematic diagram of a hexagonal wrench structure, which is a general-purpose clamp for machining large and medium-sized shells.

[0039] In the diagram: 1-Base, 11-Mounting seat, 12-Slide rail, 2-Claw base, 21-V-shaped tooth, 22-Arc tooth, 3-Claw, 4-Automatic clamping unit, 41-Modible pressure plate positioning screw, 42-Modible pressure plate, 43-Support spring, 44-Adjustable wedge, 45-Modible pressure plate support screw, 46-Locking nut, 47-Adjusting nut, 48-Modible pressure plate limit rod, 5-Self-locking unit, 51-Stop plate, 52-Stop plate return spring, 53-Wrench adapter, 54-Hex socket screw, 55-Wrench adapter return spring, 56-Adjusting nut, 6-End gear disc, 61-Push blade, 62-Helical gear disc, 7-Hex wrench. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings.

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Example 1:

[0043] like Figures 1-9 As shown, Figures 1-9As shown, a general-purpose fixture for processing large and medium-sized shells is provided. The general-purpose fixture includes a base (1), a mounting seat (11) is fixedly provided at the center of the base (1), and several slide rails (12) are fixedly provided at the upper end of the base (1). The slide rails (12) are evenly distributed along the circumference of the base (1). Each slide rail (12) is slidably provided with a claw base (2). The large end of the claw base (2) is provided with a V-shaped tooth (21), and the small end of the claw base (2) is provided with an arc-shaped tooth (22). A claw (3) is installed on the V-shaped tooth (21), and an automatic clamping unit (4) is installed on the claw (3). A self-locking unit (5) is installed on the mounting seat (11). An end gear disk (6) is tightly fastened between the self-locking unit (5) and the mounting seat (11). A pusher blade (61) is provided at the lower end of the end gear disk (6), and the pusher blade (61) meshes with the arc-shaped tooth (22).

[0044] The base (1) serves as the basic load-bearing component, providing an installation reference and stable support for all parts; the mounting base (11) is fixed to the center of the base (1) and serves as the mounting carrier for the self-locking unit (5) and the end gear disk (6), ensuring the coaxiality of the core components; the slide rail (12) is evenly distributed along the circumference of the base (1), guiding the claw base (2) to slide synchronously in the radial direction to achieve self-centering; the claw base (2) connects the claw (3) and the slide rail (12), and its large end V-shaped tooth (21) facilitates quick replacement. The chuck (3) is changed to fit different housings. The small end arc-shaped tooth (22) meshes with the pusher blade (61) of the end gear disk (6), converting the rotational motion into linear motion, which drives the chuck (3) to move synchronously. The chuck (3) directly contacts the housing to achieve positioning. The automatic clamping unit (4) prevents the housing from shifting during processing. The self-locking unit (5) locks the end gear disk (6) to prevent the chuck (3) from loosening. The end gear disk (6) transmits power through the pusher blade (61) to achieve synchronous adjustment of the chuck (3).

[0045] The automatic clamping unit (4) includes a movable pressure plate positioning screw (41), which is threadedly connected to the claw (3). The movable pressure plate positioning screw (41) is fitted with a movable pressure plate (42), a support spring (43), and an adjusting nut (47) from top to bottom. An adjustable wedge (44) is tightly fastened to the upper end of the base (1). A movable pressure plate support screw (45) passes through the branch of the movable pressure plate (42). One end of the movable pressure plate support screw (45) abuts against the inclined surface of the adjustable wedge (44), and the other end is threadedly connected to a locking nut (46) that abuts against the movable pressure plate (42).

[0046] The automatic clamping unit (4) has a movable pressure plate positioning screw (41) threadedly connected to the chuck (3), which provides installation support for the movable pressure plate (42), support spring (43) and adjusting nut (47) and can adjust the initial height. The movable pressure plate (42) is in direct contact with the housing and is an important clamping component. The support spring (43) can achieve clamping under the action of elastic force, and at the same time, it can also buffer the vibration generated during processing. The adjusting nut (47) adjusts the clamping force by changing the spring compression. The adjustable wedge (44) provides inclined support for the movable pressure plate support screw (45) and, together with the movable pressure plate support screw (45), finely adjusts the clamping degree. The locking nut (46) adjusts its position on the movable pressure plate support screw (45) to keep the clamping state of the movable pressure plate (42) stable.

[0047] A movable pressure plate limiting rod (48) is provided between the claw (3) and the movable pressure plate (42).

[0048] The movable pressure plate limiting rod (48) connects the claw (3) and the movable pressure plate (42) to prevent the movable pressure plate (42) from rotating on the horizontal plane after the movable pressure plate positioning screw (41) is released, thus maintaining the stability of the device.

[0049] The contact surfaces of the movable pressure plate positioning screw (41) and the movable pressure plate (42) are both set as spherical surfaces, and one end of the movable pressure plate support screw (45) is set as a spherical surface.

[0050] The spherical contact surface between the movable pressure plate positioning screw (41) and the movable pressure plate (42) allows the movable pressure plate (42) to swing at a small angle to fit the surface of the housing, ensuring uniform clamping force; the spherical end of the movable pressure plate support screw (45) reduces friction with the inclined surface of the adjustable wedge (44), making it slide more smoothly and improving the flexibility of clamping force adjustment.

[0051] In this embodiment, the rotating end gear disk (6) can be driven by the pusher blade (61) to mesh with the arc-shaped teeth (22), and the constraint of the slide rail (12) ensures that all the claw bases (2) can only move synchronously in the radial direction, thereby converting the circumferential power into the radial thrust of the claw bases (2), and finally realizing the automatic centering function of the fixture.

[0052] Example 2:

[0053] Based on Embodiment 1, the operation process of the self-locking unit (5) will be further explained, such as... Figure 5 , Figure 7 and Figure 10As shown, the self-locking unit (5) includes a stop plate (51), which is movably disposed inside the mounting base (11). A stop plate return spring (52) is provided between the stop plate (51) and the mounting base (11). A helical gear plate (62) is provided at the lower end of the end gear plate (6), and a matching helical tooth is provided at the upper end of the stop plate (51). A wrench adapter (53) passing through the end gear plate (6) is abutted in the middle of the stop plate (51). An internal hexagon screw (54) is threadedly connected to the mounting base (11) of the wrench adapter (53). A wrench adapter return spring (55) is sleeved on the shank of the internal hexagon screw (54).

[0054] The self-locking unit (5) has a stop plate (51) that engages with the helical gear plate (62) of the end gear plate (6) through the upper helical teeth to achieve one-way locking. The stop plate return spring (52) ensures that the two are tightly engaged. The wrench adapter (53) receives the force of the hex wrench (7) and can press down the stop plate (51) to unlock and drive the end gear plate (6) to rotate. The internal hex screw (54) guides and limits the wrench adapter (53). The wrench adapter return spring (55) resets the wrench after it is released.

[0055] An adjusting nut (56) is provided between the wrench adapter (53) and the mounting base (11) to abut against the end gear disc (6), and the adjusting nut (56) is threaded to the side wall of the mounting base (11).

[0056] The adjusting nut (56) abuts against the end gear disk (6), which restricts the up and down movement of the end gear disk (6) and prevents loosening during the rotation of the end gear disk (6).

[0057] The universal fixture is equipped with a dedicated hex wrench (7), which has a clearance groove that matches the internal hex screw (54).

[0058] A special hex wrench (7) is used to operate the wrench adapter (53) to unlock, lock, and adjust the pawl (3) of the self-locking unit (5). Its clearance groove can avoid the internal hex screw (54) to avoid interference and ensure convenient and reliable operation.

[0059] In this embodiment, a hex wrench (7) is inserted into the wrench adapter (53), and a force is applied to press down the wrench adapter (53), compressing the wrench adapter return spring (55). At the same time, the stop plate (51) is moved down, so that the helical teeth of the stop plate (51) disengage from the helical tooth plate (62) of the end gear plate (6), and the locking state is released. After the hex wrench (7) is released, the wrench adapter (53) is reset upward under the elastic force of the wrench adapter return spring (55), and the stop plate (51) is also moved upward under the action of the stop plate return spring (52). Its upper helical teeth are engaged with the helical tooth plate (62) of the end gear plate (6) again, the self-locking unit (5) is restored to the locked state, and the position of the pawl (3) is fixed.

[0060] Example 3:

[0061] Based on Examples 1 and 2, the method for clamping large and medium-sized shells of the same batch using this universal fixture is further explained, such as... Figures 4-5 As shown:

[0062] S1. Select appropriate chucks (3) according to the size and structure of the shell to be processed and install them on the chuck base (2) through V-shaped teeth (21). During installation, ensure that the fit between the chucks (3) and the chuck base (2) is ≥95%.

[0063] S2. Place the housing to be processed in a suitable position, put the hex wrench (7) into the wrench adapter (53), apply a downward force (50-80N) to unlock the self-locking unit (5) (that is, press down the stop plate (51) through the wrench adapter (53) to disengage the meshing helical teeth from the helical tooth plate (62), and then rotate the wrench adapter (53) through the hex wrench (7) to drive the end gear plate (6) to rotate. Since the push blade (61) meshes with the arc tooth (22), it drives the chuck base (2) to slide along the slide rail (12) to realize the movement of the chuck (3), and finally realize the self-centering positioning of the housing with a positioning accuracy of ±0.02mm;

[0064] S3. Adjust the relative position of the adjustable wedge (44) on the base (1) so that the inclined surface of the adjustable wedge (44) is directly below the branch of the movable pressure plate (42). Then continuously adjust the movable pressure plate support screw (45) and the movable pressure plate positioning screw (41) to achieve the appropriate clamping position (the clamping force is controlled at 80-150N). Finally, use the locking nut (46) and the adjusting nut (47) to fasten the movable pressure plate (42) on the movable pressure plate support screw (45) and the movable pressure plate positioning screw (41) to apply axial pressure to the workpiece, thus completing the clamping operation of the first workpiece.

[0065] S4. After the first workpiece is processed, operate the hex wrench (7) and put it into the wrench adapter (53). This operation is roughly the same as S2, except that the rotation direction is opposite. After the chuck (3) and movable pressure plate (42) are separated from the workpiece, the workpiece can be removed.

[0066] S5. Repeat S2 and S4 continuously without executing S3 to complete the processing of the same batch of parts. The clamping and positioning accuracy of the same batch of parts is ≤ ±0.03mm.

[0067] In this embodiment, the fixture is highly versatile and can adapt to the processing of different housings; the structural design is reasonable, expanding the processing space and improving efficiency; the automatic clamping unit ensures uniform clamping force and reduces deformation; the self-locking unit stabilizes the clamping state and suppresses chatter; it achieves high-precision positioning and quick disassembly, meeting the needs of flexible production; the clamping method improves the processing efficiency of parts in the same batch.

[0068] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A general-purpose fixture for machining large and medium-sized shells, characterized in that: The universal clamp includes a base (1), a mounting seat (11) is fixedly provided at the center of the base (1), a number of slide rails (12) are fixedly provided at the upper end of the base (1), and the slide rails (12) are evenly distributed along the circumference of the base (1). Each slide rail (12) is slidably provided with a claw base (2) at its upper end. The claw base (2) is provided with a V-shaped tooth (21) at its large end and an arc-shaped tooth (22) at its small end. A claw (3) is installed on the V-shaped tooth (21), and an automatic clamping unit (4) is installed on the claw (3). A self-locking unit (5) is installed on the mounting seat (11). An end gear disk (6) is tightly fastened between the self-locking unit (5) and the mounting seat (11). A pusher (61) is provided at the lower end of the end gear disk (6), and the pusher (61) meshes with the arc-shaped tooth (22). The automatic pressing unit (4) includes a movable pressure plate positioning screw (41), which is threadedly connected to the claw (3). The movable pressure plate positioning screw (41) is fitted with a movable pressure plate (42), a support spring (43), and an adjusting nut (47) from top to bottom. An adjustable wedge (44) is tightly fastened to the upper end of the base (1). A movable pressure plate support screw (45) passes through the branch of the movable pressure plate (42). One end of the movable pressure plate support screw (45) abuts against the inclined surface of the adjustable wedge (44), and the other end is threadedly connected to a locking nut (46) that abuts against the movable pressure plate (42). The self-locking unit (5) includes a stop plate (51), which is movably disposed inside the mounting base (11). A stop plate return spring (52) is provided between the stop plate (51) and the mounting base (11). A helical gear plate (62) is provided at the lower end of the end gear plate (6). A matching helical tooth is provided at the upper end of the stop plate (51). A wrench adapter (53) passing through the end gear plate (6) is abutted in the middle of the stop plate (51). An internal hexagon screw (54) is threadedly connected to the mounting base (11) of the wrench adapter (53). A wrench adapter return spring (55) is sleeved on the shank of the internal hexagon screw (54).

2. The universal fixture for machining large and medium-sized shells according to claim 1, characterized in that: A movable pressure plate limiting rod (48) is provided between the claw (3) and the movable pressure plate (42).

3. A universal fixture for machining large and medium-sized shells according to claim 1, characterized in that: The contact surfaces of the movable pressure plate positioning screw (41) and the movable pressure plate (42) are both set as spherical surfaces, and one end of the movable pressure plate support screw (45) is set as a spherical surface.

4. A universal fixture for machining large and medium-sized shells according to claim 1, characterized in that: An adjusting nut (56) is provided between the wrench adapter (53) and the mounting base (11) to abut against the end gear disk (6), and the adjusting nut (56) is threadedly connected to the side wall of the mounting base (11).

5. A universal fixture for machining large and medium-sized shells according to claim 1, characterized in that: The universal clamp is equipped with a dedicated hex wrench (7), which has a clearance groove that matches the hexagonal screw (9).

6. A clamping method for a general-purpose fixture for machining large and medium-sized shells according to any one of claims 1 to 5, characterized in that: S1. Select the appropriate chuck (3) according to the size and structure of the shell to be processed and install it on the chuck base (2) through the V-shaped teeth (21); S2. Place the housing to be processed in a suitable position, put the hex wrench (7) into the wrench adapter (53) and apply a downward force to unlock the self-locking unit (5), rotate the hex wrench (7) to drive the end gear disk (6) to rotate, and through the meshing transmission of the push blade (61) and the arc tooth (22), make the claw base (2) slide along the slide rail (12) to realize the self-centering positioning of the claw (3) on the housing; S3. Adjust the relative position of the adjustable wedge (44) on the base (1) so that its inclined surface is directly below the branch of the movable pressure plate (42). Adjust the movable pressure plate support screw (45) and the movable pressure plate positioning screw (41) to the appropriate pressing position. Secure the movable pressure plate (42) to the movable pressure plate support screw (45) and the movable pressure plate positioning screw (41) through the locking nut (46) and the adjusting nut (47), thereby applying axial pressure to the workpiece and completing the clamping of the first workpiece. S4. After the first workpiece is processed, operate the hexagonal wrench (7) to put it into the wrench adapter (53), repeat the disengagement action of S2 and rotate in the opposite direction. After the pawl (3) and the movable pressure plate (42) are separated from the workpiece, remove the workpiece. S5. Repeat steps S2 and S4, without performing S3, to complete the processing of the same batch of parts.

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