Auxiliary supporting device for milling key groove of shaft part of gas turbine

Abstract

The invention belongs to the technical field of milling machining, and particularly relates to an auxiliary supporting device for gas turbine shaft part key groove milling, which comprises a workbench and an auxiliary supporting assembly, the auxiliary supporting assembly comprises a base, a connecting rod, an annular piece, a supporting plate, a rolling wheel and a fastening piece. A connecting rod is inserted into the base; the upper side of the base is rotationally connected with an annular piece. The top of the connecting rod is fixedly connected with a supporting plate; the top of the supporting plate is rotationally connected with a pair of rollers; a connecting groove is formed in one side of the connecting rod; the top of the base is in threaded connection with a fastening piece. The supporting height of a shaft part is accurately adjusted, the machining precision of a key groove is effectively improved, milling force in the machining process is resisted, bending deformation of a long-shaft workpiece is prevented, a pair of idler wheels is adopted as supporting points, and the workpiece can easily and flexibly rotate around the axis of the workpiece in the supporting state. Rapid and accurate multi-angle indexing can be achieved without disassembly, the technological process is simplified, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of milling technology, specifically an auxiliary support device for keyway milling of gas turbine shaft parts. Background Technology

[0002] A gas turbine is a rotating impeller-type thermal engine that uses a continuously flowing gas as its working fluid and converts the chemical energy of fuel into mechanical work. It is widely used in industrial power generation, ship propulsion, and mechanical drives. The shaft system is the core component of a gas turbine, enabling power transmission and rotational motion. In the manufacturing process of gas turbine shaft parts, keyway milling is a crucial step in achieving precise torque transmission between the rotor, impeller, couplings, and other components. Its machining quality directly affects the assembly accuracy and dynamic stability of the entire shaft system. Therefore, keyway machining on gas turbine shaft parts is particularly important. A good keyway machining machine plays a vital role in improving keyway machining efficiency and accuracy.

[0003] Chinese patent application CN201693381U discloses a clamping device for solving the problem of excessive bending of the shaft after milling keyways in a conventional gantry milling machine. The key technical points are: V-blocks are supported below the keyways at both ends of the shaft, and side baffles are connected to both sides of each V-block. Free pads are placed in the gap between the V-blocks and the side baffles. Two "7"-shaped clamping irons are connected by adjusting bolts on both sides of the V-blocks with the shaft as the axis. The upper ends of the two "7"-shaped clamping irons press against the two sides of the keyway of the shaft, and the lower ends of each "7"-shaped clamping iron are pressed against the free pads. Each side baffle is provided with a tightening adjusting bolt for tightening the "7"-shaped clamping irons. An adjustable jack is provided between the two V-blocks to press against the lower middle of the shaft. A clamping iron is placed on top of the middle of the shaft.

[0004] In existing technologies, V-shaped blocks with jacks or fixed support devices are typically used for positioning when machining keyways in gas turbine shaft parts. However, this approach has the following drawbacks in practical applications: First, traditional support methods make it difficult to precisely adjust the workpiece height, and the process of adjusting the parallelism between the workpiece axis and the worktable is cumbersome and difficult to guarantee accuracy, directly affecting the machining quality of the keyway. Second, when machining long shaft workpieces, insufficient support rigidity can easily cause the workpiece to bend and deform under milling forces, affecting machining stability. Furthermore, for workpieces that require machining multiple keyways in the circumferential direction, existing support devices cannot achieve flexible workpiece rotation. Operators need to disassemble and re-clamp the workpiece multiple times to complete the machining of multi-angle keyways. This not only makes the process complex and inefficient, but repeated clamping can also introduce positioning errors, making it difficult to guarantee the indexing accuracy between keyways, thus affecting the assembly quality and performance of the workpiece.

[0005] Therefore, the present invention provides an auxiliary support device for keyway milling of gas turbine shaft parts. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an auxiliary support device for keyway milling of gas turbine shaft parts, comprising a worktable and an auxiliary support assembly;

[0008] The auxiliary support assembly is used to support the workpiece and adjust its angle; there are two auxiliary support assemblies, which are disposed on the surface of the worktable.

[0009] The auxiliary support assembly includes a base, connecting rod, ring component, support plate, rollers, and fasteners;

[0010] A connecting rod is inserted inside the base; an annular component is rotatably connected to the upper side of the base; the annular component is sleeved on the surface of the connecting rod and threadedly connected to it; a support plate is fixedly connected to the top of the connecting rod; a pair of rollers are rotatably connected to the top of the support plate; a connecting groove is opened on one side of the connecting rod; a fastener is threadedly connected to the top of the base, and the end of the fastener is inserted into the connecting groove.

[0011] Preferably, a support frame is fixedly connected to the surface of the support plate; a guide sleeve is fixedly connected to the top of the support frame; a guide post is threadedly connected inside the guide sleeve; and a pressure block is fixedly connected to the bottom of the guide post.

[0012] Preferably, the worktable surface is provided with a sliding groove; a pair of slide seats are slidably connected inside the sliding groove, and the base is fixedly connected to the slide seats respectively; an adjusting rod is rotatably connected inside the worktable; the adjusting rod passes through the pair of slide seats and is connected to them through a screw and nut pair; a handwheel is fixedly connected to the end of the adjusting rod.

[0013] Preferably, the threads at both ends of the adjusting rod are in opposite directions.

[0014] Preferably, the bottom of the chute is set as an inclined surface, and an inclined slag discharge trough is provided between the bottom of the inclined surface and the outer side of the workbench.

[0015] Preferably, the worktable surface is provided with a keyway cleaning assembly; the keyway cleaning assembly is used to remove metal chips inside the keyway after milling of the workpiece; the keyway cleaning assembly includes a mounting plate, an electric telescopic rod, a support block and an elastic wire;

[0016] An electric telescopic rod is fixedly connected to the surface of the mounting plate; a support block is connected to the output end of the electric telescopic rod; a set of elastic wires are evenly distributed on the upper side of the support block.

[0017] Preferably, a slider is fixedly connected to the lower side of the mounting plate, and the slider is slidably connected inside the groove; fastening posts are threaded to both ends of the mounting plate.

[0018] Preferably, the support block has an air cavity inside; an air inlet is provided on one side of the support block; and a set of air outlets are evenly distributed on the top of the support block.

[0019] Preferably, an air guide ring is fixedly connected inside the air outlet; a sealing ball is fixedly connected to the upper side of the air guide ring by a spring; and the elastic wires are all fixedly connected to the top of the sealing ball.

[0020] Preferably, a rotating shaft is rotatably connected inside the air chamber; a set of paddles are evenly distributed on the surface of the rotating shaft; an elastic rod is fixedly connected to the bottom of the sealing ball, and the elastic rod extends into the air chamber through a guide ring.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The auxiliary support device for keyway milling of gas turbine shaft parts described in this invention effectively improves the machining accuracy of the keyway by precisely adjusting the support height of the shaft parts, resists the milling force during the machining process, prevents bending deformation of long shaft workpieces, and uses a pair of rollers as support points, so that the workpiece can easily and flexibly rotate around its own axis in the supported state. It can achieve fast and accurate multi-angle indexing without disassembly, simplifying the process flow and significantly improving machining efficiency. In addition, the device has a compact and modular structure, can be flexibly arranged and fixed on the milling machine, and is suitable for shaft parts of different specifications.

[0023] 2. The auxiliary support device for keyway milling of gas turbine shaft parts according to the present invention, wherein the pressure block is made of wear-resistant material and its lower surface is machined with anti-slip texture. After the workpiece height is adjusted, the pressure block can be moved downward by rotating the guide post and closely fit the outer surface of the shaft workpiece, thereby forming a stable vertical clamping force on the workpiece. This effectively prevents the workpiece from axial movement or jumping due to the milling force during the milling process. Furthermore, the threaded connection structure between the guide post and the guide sleeve has a self-locking function to ensure that the pressure block will not loosen on its own after clamping the workpiece.

[0024] 3. The auxiliary support device for keyway milling of gas turbine shaft parts described in this invention, after the keyway milling of the workpiece is completed, rotates the keyway position to the downward, and controls the extension of the electric telescopic rod to drive the support block and elastic wire into the keyway, agitating the residual metal debris inside the keyway and causing it to fall downward. At the same time, the elastic deformation characteristics of the elastic wire are utilized to make it conform to the complex curved surface of the inner wall of the keyway, effectively cleaning the small debris in the corners and at the bottom of the groove, avoiding the metal debris residue from affecting the subsequent machining accuracy or causing scratches on the workpiece surface. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a schematic diagram of the auxiliary support component and the keyway cleaning component in this invention;

[0028] Figure 3 This is a schematic diagram of the auxiliary support component in this invention;

[0029] Figure 4 This is a schematic diagram of the keyway cleaning component in this invention;

[0030] Figure 5 This is a cross-sectional view of the present invention;

[0031] Figure 6 yes Figure 5 Enlarged view of a portion of point A in the middle;

[0032] Figure 7 This is a cross-sectional view of the support block in this invention;

[0033] Figure 8 yes Figure 7 Enlarged view of section B in the middle.

[0034] In the diagram: 1. Workbench; 2. Workpiece; 3. Base; 4. Connecting rod; 5. Ring component; 6. Support plate; 7. Roller; 8. Fastener; 9. Connecting groove; 10. Support frame; 11. Guide sleeve; 12. Guide post; 13. Pressure block; 14. Slide groove; 15. Slide seat; 16. Adjusting rod; 17. Handwheel; 18. Slag discharge trough; 19. Mounting plate; 20. Electric telescopic rod; 21. Support block; 22. Elastic wire; 23. Slider; 24. Fastening post; 25. Air chamber; 26. Air inlet; 27. Air outlet; 28. Air guide ring; 29. ​​Spring; 30. Sealing ball; 31. Rotating shaft; 32. Paddle; 33. Elastic rod. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 8 As shown, the auxiliary support device for keyway milling of gas turbine shaft parts according to the present invention includes a worktable 1 and an auxiliary support assembly;

[0037] The auxiliary support assembly is used to support the workpiece 2 and adjust its angle; there are two auxiliary support assemblies, which are disposed on the surface of the worktable 1.

[0038] The auxiliary support assembly includes a base 3, a connecting rod 4, a ring-shaped component 5, a support plate 6, a roller 7, and a fastener 8;

[0039] A connecting rod 4 is inserted inside the base 3, and the connecting rod 4 is specifically a screw; an annular part 5 is rotatably connected to the upper side of the base 3, and the annular part 5 is specifically a nut; the annular part 5 is sleeved on the surface of the connecting rod 4 and threadedly connected to it;

[0040] The base 3 has an annular groove on its upper side; the annular component 5 is fixedly connected to a guide block on its lower side, and the guide block is embedded in the annular groove and slidably connected thereto; thus, when the annular component 5 is rotated, the annular component 5 will not move along the axis of the connecting rod 4.

[0041] The top of the connecting rod 4 is fixedly connected to a support plate 6; the top of the support plate 6 is rotatably connected to a pair of rollers 7; the rollers 7 are preferably deep groove ball bearings, washers are placed on both sides of the deep groove ball bearings, cylindrical pins are inserted into the inner holes of the deep groove ball bearings, and the thickness of the washers is adjusted to ensure that the deep groove ball bearings rotate flexibly.

[0042] A connecting groove 9 is provided on one side of the connecting rod 4; a fastening member 8 is threadedly connected to the top of the base 3. The fastening member 8 is specifically a set screw, and the end of the fastening member 8 is inserted into the connecting groove 9, so that the connecting rod 4 cannot rotate and can only slide up and down along the axial direction.

[0043] The auxiliary support device for keyway milling of gas turbine shaft parts described in this invention is suitable for integration onto a milling machine, facilitating the actual machining of the keyway. In use, the journals at both ends of the shaft workpiece 2 are placed on the surface of a pair of rollers 7 of the auxiliary support assembly. By rotating the annular part 5, the connecting rod 4 moves up and down, thereby driving the workpiece 2 to move up and down through the rollers 7, adjusting the height of the workpiece 2 and aligning its axis with the worktable 1, so as to facilitate the scribing and milling of the keyway. After one milling operation is completed, the workpiece 2 can be rotated to drive the rollers 7 to rotate together, causing the workpiece 2 to rotate to a certain angle, so as to perform multi-angle keyway machining operations in sequence. It is especially suitable for parts with keyways evenly distributed around the circumference.

[0044] This invention effectively improves the machining accuracy of keyways by precisely adjusting the support height of shaft parts, resists milling forces during machining, prevents bending deformation of long shaft workpieces 2, and uses a pair of rollers 7 as support points, allowing workpiece 2 to easily and flexibly rotate around its own axis in the supported state. It can achieve fast and accurate multi-angle indexing without disassembly, simplifying the process flow and significantly improving machining efficiency. In addition, this device has a compact and modular structure, can be flexibly arranged and fixed on a milling machine, and is suitable for shaft parts of different specifications.

[0045] A support frame 10 is fixedly connected to the surface of the support plate 6; a guide sleeve 11 is fixedly connected to the top of the support frame 10; a guide post 12 is threadedly connected inside the guide sleeve 11; and a pressure block 13 is fixedly connected to the bottom of the guide post 12.

[0046] The pressure block 13 is made of wear-resistant material and has anti-slip texture on its lower surface. After the height of the workpiece 2 is adjusted, the pressure block 13 can be moved downward by rotating the guide post 12 and closely fit the outer surface of the shaft workpiece 2, thereby forming a stable vertical clamping force on the workpiece 2. This effectively prevents the workpiece 2 from axial movement or jumping due to the milling force during the milling process. In addition, the threaded connection structure between the guide post 12 and the guide sleeve 11 has a self-locking function to ensure that the pressure block 13 will not loosen on its own after clamping the workpiece 2.

[0047] In one embodiment of the present invention, a sliding groove 14 is provided on the surface of the workbench 1; a pair of sliding blocks 15 are slidably connected inside the sliding groove 14, and the base 3 is fixedly connected to the sliding blocks 15 respectively; an adjusting rod 16 is rotatably connected inside the workbench 1; the adjusting rod 16 passes through the pair of sliding blocks 15 and is connected to them through a screw and nut pair; a handwheel 17 is fixedly connected to the end of the adjusting rod 16; the threads at both ends of the adjusting rod 16 are in opposite directions.

[0048] Rotating the handwheel 17 drives the adjusting rod 16 to rotate. Since the threads at both ends of the adjusting rod 16 are in opposite directions, a pair of slide blocks 15 can move synchronously in opposite directions within the slide groove 14, thereby driving the two auxiliary support components to move closer or further apart to adapt to the support requirements of shaft parts of different lengths. The adjustment process is convenient and the positioning is accurate, ensuring that the workpiece 2 is always within the effective support range of the two auxiliary support components.

[0049] In one embodiment of the present invention, the bottom of the chute 14 is set as an inclined surface, and an inclined slag discharge chute 18 is provided between the bottom of the inclined surface and the outer side of the workbench 1.

[0050] When metal chips generated during milling fall into the slide 14, they slide down the inclined surface at the bottom of the slide 14 into the slag discharge groove 18 and are discharged outside the worktable 1 through the slag discharge groove 18. This effectively prevents chips from accumulating in the slide 14 and affecting the smooth sliding of the slide block 15, while keeping the surface of the worktable 1 clean and reducing interference with subsequent processing operations.

[0051] In one embodiment of the present invention, a keyway cleaning assembly is provided on the surface of the workbench 1; the keyway cleaning assembly is used to remove metal chips inside the keyway after the workpiece 2 is milled; the keyway cleaning assembly includes a mounting plate 19, an electric telescopic rod 20, a support block 21 and an elastic wire 22;

[0052] An electric telescopic rod 20 is fixedly connected to the surface of the mounting plate 19; a support block 21 is connected to the output end of the electric telescopic rod 20; a set of elastic wires 22 are evenly distributed on the upper side of the support block 21, and the elastic wires 22 are made of highly elastic and wear-resistant material.

[0053] After the keyway milling of workpiece 2 is completed, the keyway position is rotated downwards. By controlling the extension of the electric telescopic rod 20, the support block 21 and the elastic wire 22 are driven into the keyway to poke the residual metal debris inside the keyway and make it fall downwards. At the same time, the elastic deformation characteristics of the elastic wire 22 are utilized to make it conform to the complex curved surface of the inner wall of the keyway, effectively cleaning the small debris in the corners and at the bottom of the groove, avoiding the metal debris residue from affecting the subsequent machining accuracy or causing scratches on the surface of workpiece 2. Furthermore, the keyway cleaning component can be used in the machining of keyways at other angles, such as two keyways spaced 180 degrees apart. After one keyway is machined, it is rotated downwards and cleaned using the keyway cleaning component. At the same time, the other keyway on the upper side can be machined simultaneously, realizing the simultaneous keyway milling and cleaning, improving process efficiency.

[0054] The mounting plate 19 is fixedly connected to a slider 23 on its lower side, and the slider 23 is slidably connected inside the groove 14; the mounting plate 19 is threadedly connected to fastening posts 24 at both ends.

[0055] By loosening the fastening post 24, the fixing restriction on the mounting plate 19 can be released. At this time, the slider 23 can slide freely along the length of the slide groove 14, thereby driving the entire keyway cleaning assembly to adjust its position. When it is necessary to clean keyways of different positions or different specifications, simply push the mounting plate 19 to move the slider 23 to the target position within the slide groove 14, and then tighten the fastening post 24 to stably fix the mounting plate 19, ensuring that the cleaning assembly will not shift during operation. This design makes the keyway cleaning assembly more widely applicable, capable of adapting to the cleaning needs of keyways at different positions on various workpieces 2. At the same time, the adjustment operation is convenient, greatly improving the flexibility and practicality of the equipment.

[0056] In one embodiment of the present invention, the support block 21 has an air cavity 25 inside; an air inlet 26 is provided on one side of the support block 21; and a set of air outlets 27 are evenly distributed on the top of the support block 21.

[0057] The air inlet 26 can be connected to an external air source device via an air pipe. When the elastic wire 22 is inserted into the keyway for cleaning, the external air source supplies compressed air into the air chamber 25 through the air inlet 26. After being buffered by the air chamber 25, the compressed air is ejected upwards from the evenly distributed air outlets 27, forming multiple airflows that act on the inner wall of the keyway and the surface of the elastic wire 22. The ejected airflow can promptly blow away the metal debris dislodged by the elastic wire 22 from the inside of the keyway, preventing secondary residue of debris in the keyway.

[0058] An air guide ring 28 is fixedly connected inside the air outlet 27; a sealing ball 30 is fixedly connected to the upper side of the air guide ring 28 by a spring 29; and the elastic wires 22 are all fixedly connected to the top of the sealing ball 30.

[0059] When compressed air is introduced into the air chamber 25, the air pressure drives the sealing ball 30 to move upward, the spring 29 is stretched, and the sealing ball 30 separates from the air outlet 27, allowing the air outlet 27 to open and blow air into the keyway. When compressed air is not introduced into the support block 21, the sealing ball 30 is pulled downward by the spring 29 and re-enters the air outlet 27 to seal it. This effectively prevents metal chips, coolant and other impurities generated during milling from entering the air chamber 25 through the air outlet 27, avoiding blockage of the air chamber 25 or damage to internal parts, ensuring the cleanliness and normal operation of the air circuit system. Furthermore, since the elastic wire 22 is arranged on the surface of the sealing ball 30, the sealing ball 30 can drive the elastic wire 22 to move together during the up and down movement, causing the elastic wire 22 to vibrate slightly, removing the debris adhering to the surface of the elastic wire 22, and preventing the elastic wire 22 from being contaminated with too much debris during the cleaning process, which would affect the subsequent cleaning effect.

[0060] The air chamber 25 is rotatably connected to a rotating shaft 31, and the rotating shaft 31 is tangentially arranged with the air inlet 26; a set of paddles 32 are evenly distributed on the surface of the rotating shaft 31; the bottom of the sealing ball 30 is fixedly connected to an elastic rod 33, and the elastic rod 33 extends into the air chamber 25 through the air guide ring 28.

[0061] When an external air source delivers compressed air to the air chamber 25 through the air inlet 26, the high-speed airflow impacts the paddle 32 due to the tangential arrangement of the rotating shaft 31 and the air inlet 26. This causes the rotating shaft 31 to rotate rapidly inside the air chamber 25. The rotating paddle 32 intermittently impacts the elastic rod 33 extending into the air chamber 25, causing the elastic rod 33 to vibrate laterally. The vibration of the elastic rod 33 is transmitted to the sealing ball 30, which in turn causes the elastic wire 22 fixed to the top of the sealing ball 30 to vibrate laterally. This more effectively removes stubborn debris adhering to the inner wall of the keyway, especially in dead corners such as the junction of the bottom and side walls of the keyway. At the same time, the vibrating elastic wire 22 works in conjunction with the airflow to more thoroughly remove the debris from the keyway and reduce the adhesion of debris to the surface of the elastic wire 22.

[0062] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0063] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary support device for keyway milling of gas turbine shaft parts, characterized in that: Includes a worktable (1) and auxiliary support components; The auxiliary support assembly is used to support the workpiece (2) and adjust its angle; there are two auxiliary support assemblies and they are set on the surface of the worktable (1); The auxiliary support assembly includes a base (3), a connecting rod (4), a ring-shaped component (5), a support plate (6), a roller (7), and a fastener (8). A connecting rod (4) is inserted inside the base (3); an annular piece (5) is rotatably connected to the upper side of the base (3); the annular piece (5) is sleeved on the surface of the connecting rod (4) and detachably connected to it; a support plate (6) is fixedly connected to the top of the connecting rod (4); a pair of rollers (7) are rotatably connected to the top of the support plate (6); a connecting groove (9) is opened on one side of the connecting rod (4); a fastener (8) is detachably connected to the top of the base (3), and the end of the fastener (8) is inserted into the connecting groove (9).

2. The auxiliary support device for keyway milling of gas turbine shaft parts according to claim 1, characterized in that: The support plate (6) is fixedly connected to a support frame (10); the top of the support frame (10) is fixedly connected to a guide sleeve (11); the guide sleeve (11) is detachably connected to a guide post (12); the bottom of the guide post (12) is fixedly connected to a pressure block (13).

3. The auxiliary support device for keyway milling of gas turbine shaft parts according to claim 1, characterized in that: The workbench (1) has a sliding groove (14) on its surface; a pair of slide seats (15) are slidably connected inside the sliding groove (14), and the base (3) is fixedly connected to the slide seats (15) respectively; an adjusting rod (16) is rotatably connected inside the workbench (1); the adjusting rod (16) passes through the pair of slide seats (15) and is connected to them through a screw and nut pair; a handwheel (17) is fixedly connected to the end of the adjusting rod (16).

4. The auxiliary support device for keyway milling of gas turbine shaft parts according to claim 3, characterized in that: The threads at both ends of the adjusting rod (16) are in opposite directions.

5. The auxiliary support device for keyway milling of gas turbine shaft parts according to claim 3, characterized in that: The bottom of the chute (14) is set as an inclined surface, and an inclined slag discharge chute (18) is opened between the bottom of the inclined surface and the outside of the workbench (1).

6. The auxiliary support device for keyway milling of gas turbine shaft parts according to claim 3, characterized in that: The workbench (1) is provided with a keyway cleaning assembly; the keyway cleaning assembly is used to remove metal chips inside the keyway after the workpiece (2) is milled; the keyway cleaning assembly includes a mounting plate (19), an electric telescopic rod (20), a support block (21) and an elastic wire (22). An electric telescopic rod (20) is fixedly connected to the surface of the mounting plate (19); a support block (21) is connected to the output end of the electric telescopic rod (20); a set of elastic wires (22) are evenly distributed on the upper side of the support block (21).

7. An auxiliary support device for keyway milling of gas turbine shaft parts according to claim 6, characterized in that: The mounting plate (19) is fixedly connected to a slider (23) on its lower side, and the slider (23) is slidably connected to the inside of the groove (14); the mounting plate (19) is detachably connected to fastening posts (24) at both ends.

8. An auxiliary support device for keyway milling of gas turbine shaft parts according to claim 6, characterized in that: The support block (21) has an air chamber (25) inside; an air inlet (26) is provided on one side of the support block (21); and a set of air outlets (27) are evenly distributed on the top of the support block (21).

9. An auxiliary support device for keyway milling of gas turbine shaft parts according to claim 8, characterized in that: An air guide ring (28) is fixedly connected inside the air outlet (27); a sealing ball (30) is fixedly connected to the upper side of the air guide ring (28) by a spring (29); and the elastic wires (22) are all fixedly connected to the top of the sealing ball (30).

10. An auxiliary support device for keyway milling of gas turbine shaft parts according to claim 9, characterized in that: The air chamber (25) is rotatably connected to a rotating shaft (31); a set of paddles (32) are evenly distributed on the surface of the rotating shaft (31); the bottom of the sealing ball (30) is fixedly connected to an elastic rod (33), and the elastic rod (33) extends into the air chamber (25) through the air guide ring (28).

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