A machining device for helicopter tail rotor control fork

Abstract

This invention discloses a machining device for a helicopter tail rotor control fork, wherein: a zero-point positioning system is used to achieve positioning and clamping between the zero-point positioning system subplate and the machine tool; a universal quick-change tooling is installed on the upper part of the zero-point positioning system subplate, the universal quick-change tooling includes a tooling plate, the upper surface of which is distributed with multiple fixing grooves; the tooling plate of the universal quick-change tooling is installed onto the zero-point positioning system subplate by means of connecting positioning pins engaging with connecting positioning holes opened on the surface of the zero-point positioning system subplate; a clamping special tooling includes a special tooling base plate, the bottom of which is provided with a connecting positioning block that can be engaged into the fixing groove on the universal quick-change tooling; the clamping special tooling also includes a pressure plate, a pressure plate nut, and a pressure plate bolt; a positioning base is installed on the special tooling base plate, the positioning base being provided with positioning screw holes for installing the helicopter tail rotor control fork.

Description

Technical Field

[0001] This invention relates to the field of machining, and more specifically to a machining device for a helicopter tail rotor control fork. Background Technology

[0002] The function of the helicopter tail rotor system is to balance the reaction torque during rotor rotation and to control the helicopter's heading by manipulating the tail rotor pitch. The tail rotor hub is the main component of the tail rotor system, used to install and drive the tail rotor blades to rotate, and to transmit the tail rotor's thrust and other loads to the tail boom through the tail gearbox and tail gearbox platform. The tail rotor hub mainly consists of a central transition component, a pitch control arm, a pitch control linkage, and a fork-shaped component. The fork-shaped component is responsible for transmitting the control force of the control system to the pitch control linkage, which in turn transmits it to the pitch control arm. The pitch control arm then transmits the force to the central transition component, the flexible beam, and the blades, resulting in changes in blade attitude. During the entire blade control process, the fork-shaped component is the most important force-transmitting part. It has a complex structure, is made of titanium alloy, a difficult-to-machine material, requires high precision, is difficult to machine, and has low machining efficiency. In routine fatigue inspection failures and tail rotor hub malfunctions, the fork-shaped component is a high-frequency problem component. Currently, there is no dedicated tooling for machining helicopter tail rotor control fork-shaped components. Summary of the Invention

[0003] The purpose of this invention is to provide a machining device for helicopter tail rotor control fork components, in order to solve the problems of low efficiency and high difficulty in existing machining methods.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A machining device for a helicopter tail rotor control fork includes a zero-point positioning system, a universal quick-change tooling, and a special clamping tooling, wherein:

[0006] The zero-point positioning system is used to achieve positioning and clamping between the zero-point positioning system sub-board and the machine tool;

[0007] The universal quick-change tooling is installed on the upper part of the zero-point positioning system sub-plate. The universal quick-change tooling includes a tooling plate with multiple fixing grooves distributed on the upper surface of the tooling plate. The tooling plate of the universal quick-change tooling is installed onto the zero-point positioning system sub-plate by using connecting positioning pins to cooperate with connecting positioning holes opened on the surface of the zero-point positioning system sub-plate.

[0008] The clamping fixture includes a special fixture base plate, the bottom of which is equipped with a connecting positioning block that can be engaged into a fixing groove on a universal quick-change fixture. The fixture also includes a pressure plate, a pressure plate nut, and a pressure plate bolt. The bottom of the pressure plate bolt is fitted into a fixing groove on the fixture plate and can slide within the groove. The rear of the pressure plate is fitted to the upper end of the pressure plate bolt via the pressure plate nut, and the front of the pressure plate presses against the surface of the special fixture base plate. Tightening the pressure plate nut secures the special fixture base plate to the universal quick-change fixture. A raised base is located in the center of the upper surface of the special fixture base plate, and a positioning base is mounted on the raised base. The positioning base has positioning screw holes for mounting helicopter tail rotor control forks.

[0009] Furthermore, the helicopter tail rotor fork-shaped component has an X-shaped structure, including a base and four double-fork lugs that curve upwards on both sides of the base; a central hole is provided on the base.

[0010] Furthermore, an angular locator is provided on the upper surface of the special tooling base plate. The angular locator includes a positioning rod perpendicular to the upper surface of the special tooling base plate. The outer diameter of the upper end of the positioning rod is adapted to the distance between the two forks of the double fork structure on the helicopter tail rotor fork.

[0011] Furthermore, a clamping cap is provided on the upper part of the base of the helicopter tail rotor fork-shaped component. The clamping bolt passes through the clamping cap and the center hole and is screwed into the positioning screw hole to achieve the clamping and positioning of the helicopter tail rotor fork-shaped component.

[0012] Furthermore, the zero-point positioning system includes a zero-point positioner installed on the machine tool and a positioning pull pin disposed at the bottom of the zero-point positioning system sub-board.

[0013] Furthermore, multiple sets of pressure plates, pressure plate nuts, and pressure plate bolts are provided to press the special tooling base plate at different positions.

[0014] Furthermore, the clamping fixture also includes a pad, which is placed between the lower rear of the pressure plate and the upper surface of the fixture plate of the general quick-change fixture.

[0015] Furthermore, the machining fixture also includes a slot machining fixture;

[0016] The slot machining fixture includes a circular fixture base with mounting grooves distributed on its circumference. The fixture base is mounted on a machine tool by bolts passing through the mounting grooves. The upper surface of the fixture base is provided with a multi-layered stepped machining base. A first positioning hole is opened on the machining base. A second positioning hole is opened on the helicopter tail rotor control fork-shaped component, which mates with the first positioning hole. The positioning of the fork-shaped component on the slot machining fixture is completed by the cooperation of the first positioning pin, the first positioning hole, and the second positioning hole.

[0017] Furthermore, a third positioning hole is made on the slot guide positioning component required for the slot process, and a fourth positioning hole is made on the helicopter tail rotor control fork component accordingly. The installation and positioning of the slot guide positioning component is completed by the cooperation of the second positioning pin, the third positioning hole and the fourth positioning hole.

[0018] Furthermore, during the processing of helicopter tail rotor fork-shaped components:

[0019] In the first process, a general-purpose quick-change fixture is used to perform rough positioning datum machining on the machining center. The general-purpose quick-change fixture initially positions the product and performs datum machining. After the datum machining is completed, the product is clamped on the lathe using the machined datum and then the outer and inner contours are finished. During this process, the tolerance in the thickness direction of the product is tightened to reduce the clamping error caused by the change of datum when machining products in different coordinate systems in the future. After the turning machining is completed, the special fixture is prepared for clamping.

[0020] Use the connecting positioning pin to pass through the connecting positioning hole on the zero-point positioning system sub-board to connect the zero-point positioning system sub-board to the general quick-change tooling. Then use the error-proof positioning hole and the connecting positioning block to position the clamping special tooling and the general quick-change tooling. Use the pad block, pressure plate, pressure plate nut and pressure plate bolt to fix the special tooling on the general quick-change tooling to complete the combination of the required tooling.

[0021] The product is mounted on the positioning base. Angular positioning is achieved using an angular positioner. After positioning, axial clamping force is applied using the clamping cap and clamping bolts to ensure clamping stability. Before automated machining, an error-proofing program is used with the error-proofing positioning holes to ensure the tooling is in a relatively correct position on the machine tool. Then, automated alignment and machining are performed. After machining, the product is rotated 180 degrees, and the other side is used as the main reference for positioning and clamping before machining. After the machining center completes machining, slot machining is performed on the product.

[0022] After the above machining is completed, non-destructive testing is used to ensure that there are no cracks or damage on the product surface.

[0023] Compared with the prior art, the present invention has the following technical features:

[0024] The processing apparatus of this invention includes four devices: a zero-point positioning system, a universal quick-change tooling, a clamping-specific tooling, and a slot machining tooling. These ensure rapid and accurate clamping of parts. Furthermore, the application of datum machining and datum conversion methods during product processing, through stricter control of the precision of relevant parts of the product during processing, reduces the introduction of errors during datum conversion, reduces clamping difficulty, and improves the positioning accuracy of the product. This processing apparatus can be expanded for use in critical load-bearing products and high-precision products for helicopters, with particularly broad application prospects in the processing of landing gear parts and lift system parts in the aerospace manufacturing field. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the processing device structure of the present invention;

[0026] Figure 2 This is an exploded view of the processing apparatus of the present invention;

[0027] Figure 3 A schematic diagram of the tooling for slot machining.

[0028] The following are the labels in the diagram: 1 Zero-point positioning system sub-board, 2 Tooling plate, 3 Pad, 4 Pressure plate, 5 Pressure plate nut, 6 Pressure plate bolt, 7 Special tooling base plate, 8 Anti-misalignment positioning hole, 9 Raising base, 10 Positioning base, 11 Clamping cap, 12 Clamping bolt, 13 Helicopter tail rotor control fork, 14 Angular positioner, 15 Connecting positioning block, 16 Connecting positioning pin, 17 Connecting positioning hole, 18 Tooling base, 19 Machining base, 20 First positioning hole, 21 Double fork lug structure, 22 First positioning pin, 23 Slot guide positioning component, 24 Second positioning hole, 25 Third positioning hole, 26 Second positioning pin. Detailed Implementation

[0029] This invention addresses the issues of machining quality and efficiency of helicopter tail rotor control fork components by designing a dedicated machining device. When machine tool production resources are insufficient, the device can quickly replace the dedicated tooling and also has the function of quick clamping of other products.

[0030] See Figures 1 to 3 The helicopter tail rotor fork-shaped component 13 is made of titanium alloy forgings, which presents significant challenges in processing. It features an X-shaped structure, including a base and four upward-curving double-fork lug structures 21 distributed on both sides of the base. A central hole is provided on the base. Each fork lug of the double-fork lug structure 21 has a high-precision hole. The width of the fork lug and the positional accuracy of the high-precision holes are difficult to machine. Furthermore, to ensure consistency during product processing, the product is processed on an unmanned production line. Therefore, the division of the processing surfaces, tooling design, and the continuity of the processes present considerable challenges. Considering the structural characteristics of the product, this application proposes a processing device for the helicopter tail rotor control fork-shaped component.

[0031] Referring to the accompanying drawings, the helicopter tail rotor control fork machining device of the present invention includes a zero-point positioning system, a universal quick-change tooling, and a special clamping tooling, wherein:

[0032] The zero-point positioning system is used to achieve rapid positioning and clamping between the zero-point positioning system sub-plate 1 and the machine tool, reducing auxiliary time in machining. The zero-point positioning system includes a zero-point positioner installed on the machine tool and a positioning pull stud located at the bottom of the zero-point positioning system sub-plate 1. By clamping or releasing the positioning pull stud with the zero-point positioner, the zero-point positioning system sub-plate 1 can be quickly assembled and disassembled, ensuring rapid replacement of the zero-point positioning sub-plate 1 and good repeatability. The zero-point positioner and positioning pull stud are existing products in the prior art, and their principles will not be elaborated further.

[0033] A universal quick-change fixture is installed on the upper part of the zero-point positioning system subplate 1. The fixture includes a rectangular fixture plate 2, the upper surface of which has multiple horizontally inclined, inverted T-shaped fixing grooves. The fixture plate 2 is installed onto the zero-point positioning system subplate 1 using an interference fit between connecting positioning pins 16 and connecting positioning holes 17 on the surface of the zero-point positioning system subplate 1, ensuring assembly accuracy and stability during use. The fixing grooves cooperate with the clamping bolts 6 in the clamping special fixture to clamp and position the special fixture base plate 7. After removing the clamping special fixture from the universal quick-change fixture, this fixture can still be used as a universal fixture for machining other parts, enabling quick changeovers.

[0034] A special clamping fixture is installed on a general-purpose quick-change fixture. The special clamping fixture includes a special fixture base plate 7, with a connecting positioning block 15 at its bottom. The connecting positioning block 15 can be engaged into a fixing groove on the general-purpose quick-change fixture to initially determine the position of the special fixture base plate 7 on the general-purpose quick-change fixture, completing the initial positioning. The special clamping fixture also includes a pressure plate 4, a pressure plate nut 5, and a pressure plate bolt 6. The bottom of the pressure plate bolt 6 is fitted into a fixing groove on the fixture plate 2 and can slide within the fixing groove. The rear part of the pressure plate 4 is fitted to the upper end of the pressure plate bolt 6 via the pressure plate nut 5, and the front part of the pressure plate 4 presses against the surface of the special fixture base plate 7. Tightening the pressure plate nut 5 presses the special fixture base plate 7 firmly onto the general-purpose quick-change fixture. Multiple sets of pressure plates 4, pressure plate nuts 5, and pressure plate bolts 6 are provided to press the special fixture base plate 7 at different positions.

[0035] Optionally, in order to achieve a better clamping effect, the clamping fixture also includes a pad 3, which is placed between the lower rear part of the pressure plate 4 and the upper surface of the fixture plate 2 of the universal quick-change fixture. The pad 3 can be used to apply pressure better during the tightening of the pressure plate nut 5.

[0036] In this solution, the special tooling base plate 7 is a rectangular plate, and a heightening base 9 is provided in the middle of the upper surface of the special tooling base plate 7. A positioning base 10 is installed on the heightening base 9, and a positioning screw hole is provided on the positioning base 10. By increasing the clamping height through the heightening base 9 and the positioning base 10, sufficient machining space is achieved during subsequent boring. An angular locator 14 is provided on the upper surface of the special tooling base plate 7. The angular locator 14 includes a positioning rod perpendicular to the upper surface of the special tooling base plate 7. The outer diameter of the upper end of the positioning rod is adapted to the distance between the two forks of the double fork structure 21 on the helicopter tail rotor fork part 13 (there is no gap between the positioning rod and the fork after it is inserted into the double fork structure 21). The base of the helicopter tail rotor fork part 13 is placed on the surface of the positioning base 10, so that the center hole on the helicopter tail rotor fork part 13 is coaxial with the positioning screw hole on the positioning base 10, and the positioning rod of the angular locator 14 is inserted into one of the double fork structures 21 for angular positioning. A clamping cap 11 is provided on the upper part of the base of the helicopter tail rotor fork part 13. The clamping bolt 12 passes through the clamping cap 11 and the center hole and is screwed into the positioning screw hole to achieve clamping and positioning of the helicopter tail rotor fork part 13, ensuring processing stability and positioning accuracy.

[0037] Optionally, error-proof positioning holes 8 are provided on the special tooling base plate 7. Before running the automatic machining program, the error-proof positioning holes 8 are measured first to perform preliminary error-proof verification. In addition, the error-proof positioning holes 8 are also used for positioning when clamping special tooling and connecting general quick-change tooling. They are used in conjunction with the connecting positioning block 15 to ensure that the loading and unloading of special tooling is fast and accurate each time. The process distribution is divided according to the processing time and processing characteristics to balance the unmanned production cycle, avoid interference from human factors, and ensure the consistency of product processing. In addition, online measurement is also adopted to reduce the turnover cycle and measurement cycle and reduce the introduction of human measurement errors. Tool monitoring is used to manage the tool usage time and automatically replace tools that have reached the end of their service life.

[0038] The inner and outer contours and center hole of the helicopter tail rotor control fork 13 are machined by turning. During the turning process, the thickness tolerance is tightened manually to reduce the cumulative error caused by the subsequent rotation of the center coordinate system. During the clamping process, the upper and lower surfaces of the base of the helicopter tail rotor control fork 13 are used as the main positioning surfaces, and the angular positioner 14 is used for directional positioning. The product is then processed to include the recess, fork lugs, and fork lug holes.

[0039] After the above processing is completed, if slot processing is required, the processing fixture also includes a slot processing fixture; the slot processing fixture includes a circular fixture base 18, on which mounting grooves are distributed. The fixture base 18 is mounted on the machine tool by bolts passing through the mounting grooves; a multi-layer stepped processing base 19 is provided on the upper surface of the fixture base 18, and a first positioning hole 20 is opened on the processing base 19. A second positioning hole 24 that mates with the first positioning hole 20 is opened on the helicopter tail rotor control fork 13. The positioning of the fork 13 on the slot processing fixture is completed by the cooperation of the first positioning pin 22, the first positioning hole 20, and the second positioning hole 24.

[0040] Since the slotting process requires the use of a dedicated slotting fixture, the base of the helicopter tail rotor control fork 13 needs to be mounted upside down on the fixture base 18. Then, the slotting guide positioning component 23 on the slotting fixture is installed onto the base. A third positioning hole 25 is formed on the slotting guide positioning component 23, and a corresponding fourth positioning hole is formed on the helicopter tail rotor control fork 13. The second positioning pin 26, the third positioning hole 25, and the fourth positioning hole are used to complete the installation and positioning of the slotting guide positioning component 23, after which the slotting process can be performed. The slotting fixture and the slotting guide positioning component 23 are existing products used for slotting processes and will not be described in detail.

[0041] Example:

[0042] The helicopter tail rotor fork component is a titanium alloy die forging. The die forging blank is the product's outer shape. During rough machining, positioning is not easy to achieve. In the first process, a general-purpose quick-change tooling is used to perform rough positioning datum machining on the machining center. The general-purpose quick-change tooling initially positions the product, and after clamping the product with shims, pressure plates, pressure plate nuts, and pressure plate bolts, preliminary datum machining is performed. After the datum machining is completed, the product's outer and inner contours are finished on a lathe using the machined datum. During this process, the tolerance in the product's thickness direction is tightened to reduce clamping errors caused by changes in the datum when machining products in different coordinate systems. After the turning machining is completed, the product is prepared for clamping with special tooling.

[0043] By passing the connecting positioning pin through the connecting positioning hole on the zero-point positioning system sub-board, the zero-point positioning system sub-board is accurately and reliably connected to the universal quick-change tooling. Then, the anti-error positioning hole and the connecting positioning block are used to position the clamping special tooling and the universal quick-change tooling. The special tooling is fixed on the universal quick-change tooling using the pad block, pressure plate, pressure plate nut, and pressure plate bolt to complete the assembly of the required tooling.

[0044] The product is mounted on the positioning base. Angular positioning is achieved using an angular positioner. After positioning, axial clamping force is applied using the clamping cap and clamping bolts to ensure clamping stability. Before automated machining, an error-proofing program is used with the error-proofing positioning holes to ensure the tooling is in a relatively correct position on the machine tool. Then, automated alignment and machining are performed. After machining, the product is rotated 180 degrees, and the other side is used as the main reference for positioning and clamping before further machining. After machining by the machining center, slot machining is performed on the product.

[0045] After the above machining is completed, non-destructive testing is used to ensure that the product surface is free of cracks and damage; surface treatment is used to ensure that the product has good corrosion resistance during use.

[0046] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A processing device for a helicopter tail rotor control fork, characterized in that, include: Zero-point positioning system, universal quick-change tooling, and special clamping tooling, including: The zero-point positioning system is used to achieve positioning and clamping between the zero-point positioning system sub-board (1) and the machine tool; The universal quick-change tooling is installed on the upper part of the zero-point positioning system sub-plate (1). The universal quick-change tooling includes a tooling plate (2), and the upper surface of the tooling plate (2) is distributed with multiple fixing grooves. The tooling plate (2) of the universal quick-change tooling is installed on the zero-point positioning system sub-plate (1) by using the connecting positioning pin (16) to cooperate with the connecting positioning hole (17) opened on the surface of the zero-point positioning system sub-plate (1). The clamping fixture includes a special fixture base plate (7), and a connecting positioning block (15) is provided at the bottom of the special fixture base plate (7). The connecting positioning block (15) can be inserted into the fixing groove on the general quick change fixture. The clamping fixture also includes a pressure plate (4), a pressure plate nut (5), and a pressure plate bolt (6). The bottom of the pressure plate bolt (6) is fitted into the fixing groove on the fixture plate (2) and can slide in the fixing groove. The rear part of the pressure plate (4) is fitted into the fixture plate (2) by the pressure plate nut (5). The upper end of the pressure plate bolt (6) and the front part of the pressure plate (4) press against the surface of the special tooling base plate (7). By tightening the pressure plate nut (5), the special tooling base plate (7) is pressed onto the tooling plate (2) of the general quick change tooling. A heightening base (9) is provided in the middle of the upper surface of the special tooling base plate (7). A positioning base (10) is installed on the heightening base (9). A positioning screw hole is provided on the positioning base (10) for installing the helicopter tail rotor control fork (13). The helicopter tail rotor control fork (13) is an X-shaped structure, including a base and four double fork lugs (21) that are distributed on both sides of the base and are raised upwards. A central hole is provided on the base. The upper surface of the special tooling base plate (7) is provided with an angular locator (14). The angular locator (14) includes a positioning rod perpendicular to the upper surface of the special tooling base plate (7). The outer diameter of the upper end of the positioning rod is adapted to the distance between the two forks of the double fork ear structure (21) on the helicopter tail rotor control fork (13). After the positioning rod is inserted into the double fork ear structure (21), there is no gap between it and the fork ear. The base of the helicopter tail rotor control fork (13) is placed on the surface of the positioning base (10), so that the central hole on the helicopter tail rotor control fork (13) is coaxial with the positioning screw hole on the positioning base (10), and the positioning rod of the angular positioner (14) is inserted into one of the double fork lug structures (21) for angular positioning; a clamping cap (11) is provided on the upper part of the base of the helicopter tail rotor control fork (13), and a clamping bolt (12) is passed through the clamping cap (11), the central hole and screwed into the positioning screw hole to achieve clamping and positioning of the helicopter tail rotor control fork (13); The clamping fixture also includes a slot machining fixture; The slot machining fixture includes a circular fixture base (18), on which mounting grooves are distributed. The fixture base (18) is mounted on a machine tool by bolts passing through the mounting grooves. A multi-layer stepped machining base (19) is provided on the upper surface of the fixture base (18). A first positioning hole (20) is opened on the machining base (19). A second positioning hole (24) that mates with the first positioning hole (20) is opened on the helicopter tail rotor control fork (13). The positioning of the helicopter tail rotor control fork (13) on the slot machining fixture is completed by the cooperation of the first positioning pin (22), the first positioning hole (20), and the second positioning hole (24). A third positioning hole (25) is opened on the slot guide positioning component (23) required for the slot process, and a fourth positioning hole is opened on the helicopter tail rotor control fork component (13) accordingly. The installation and positioning of the slot guide positioning component (23) is completed by the cooperation of the second positioning pin (26), the third positioning hole (25) and the fourth positioning hole.

2. The helicopter tail rotor control fork machining device according to claim 1, characterized in that, The zero-point positioning system includes a zero-point positioner installed on the machine tool and a positioning pull pin set at the bottom of the zero-point positioning system sub-board (1).

3. The helicopter tail rotor control fork machining device according to claim 1, characterized in that, Multiple sets of pressure plates (4), pressure plate nuts (5), and pressure plate bolts (6) are provided to press the special tooling base plate (7) at different positions.

4. The helicopter tail rotor control fork machining device according to claim 1, characterized in that, The clamping fixture also includes a pad (3), which is placed between the lower rear part of the pressure plate (4) and the upper surface of the fixture plate (2) of the general quick change fixture.

5. The helicopter tail rotor control fork machining device according to claim 1, characterized in that, When machining the helicopter tail rotor control fork (13): In the first process, a general-purpose quick-change fixture is used to perform rough positioning datum machining on the machining center. The general-purpose quick-change fixture initially positions the product and performs datum machining. After the datum machining is completed, the product is clamped on the lathe using the machined datum and then the outer and inner contours are finished. During this process, the tolerance in the thickness direction of the product is tightened to reduce the clamping error caused by the change of datum when machining products in different coordinate systems in the future. After the turning machining is completed, the special fixture is prepared for clamping. Use the connecting positioning pin to pass through the connecting positioning hole on the zero-point positioning system sub-board to connect the zero-point positioning system sub-board to the general quick-change tooling. Then use the error-proof positioning hole and the connecting positioning block to position the clamping special tooling and the general quick-change tooling. Use the pad block, pressure plate, pressure plate nut and pressure plate bolt to fix the special tooling on the general quick-change tooling to complete the combination of the required tooling. The product is mounted on the positioning base. Angular positioning is achieved using an angular positioner. After positioning, axial clamping force is applied using the clamping cap and clamping bolts to ensure clamping stability. Before automated machining, an error-proofing program is used with the error-proofing positioning holes to ensure the tooling is in a relatively correct position on the machine tool. Then, automated alignment and machining are performed. After machining, the product is rotated 180 degrees, and the other side is used as the main reference for positioning and clamping before machining. After the machining center completes machining, slot machining is performed on the product. After the above machining is completed, non-destructive testing is used to ensure that there are no cracks or damage on the product surface.

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