A fixture for processing the process benchmark of fan stator blades

Abstract

A fixture for fan stator blade process benchmark processing includes a first blade body positioning seat, a second blade body positioning seat, a blade leading edge plate support positioning mechanism, a blade trailing edge plate support positioning mechanism, a blade leading edge plate clamping positioning mechanism, a blade trailing edge plate clamping positioning mechanism, a blade leading edge plate top clamping mechanism, a blade trailing edge plate top clamping mechanism, a blade body clamping mechanism and a base; the first and second blade body positioning seats are arranged in parallel in the middle of the base; the first blade body positioning seat is provided with a blade leading edge plate positioning pin; the second blade body positioning seat is provided with a blade spanwise edge plate top tightening screw, and a top tightening block is provided at the end of the screw. Based on the six-point positioning principle, it can greatly improve the positioning and clamping reliability and stability of the fan stator blade raw material, avoid the position instability or even positioning deviation of the fan stator blade raw material caused by milling force, effectively improve the part processing qualification rate of the fan stator blade in the first processing procedure, and reduce the cost of the fan stator blade process benchmark processing.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing parts of aviation engines, and in particular relates to a fixture for process benchmark processing of fan stator blades. Background Art

[0002] As one of the core components of aircraft engines, fan stator blades are often processed using the rough material datum during blade casting or forging during the first processing step, and the rough material datum usually adopts the six-point positioning principle.

[0003] However, when the fan stator blade rough material is positioned and clamped using the traditional fixture and based on the six-point positioning principle, although the position reference of the fan stator blade rough material can be guaranteed by the traditional fixture, during machining, the existence of milling force often causes the position of the fan stator blade rough material to become unstable, and in severe cases, it may cause positioning deviation. The reason is that the traditional fixture cannot fully guarantee the rigidity of the fan stator blade rough material after positioning and clamping, which brings great trouble to the process reference processing of the fan stator blade, reduces the part processing qualification rate of the fan stator blade in the first processing procedure, and also further increases the cost of the process reference processing of the fan stator blade. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a fixture for process benchmark processing of fan stator blades. Based on the six-point positioning principle, it can greatly improve the positioning and clamping reliability and stability of the fan stator blade raw material, avoid the position instability or even positioning deviation of the fan stator blade raw material due to milling force, effectively improve the part processing qualification rate of the fan stator blades in the first processing procedure, and reduce the cost of process benchmark processing of fan stator blades.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fixture for process benchmark processing of fan stator blades, comprising a first blade body positioning seat, a second blade body positioning seat, a blade leading edge plate supporting positioning mechanism, a blade trailing edge plate supporting positioning mechanism, a blade leading edge plate pressing positioning mechanism, a blade trailing edge plate pressing positioning mechanism, a blade leading edge plate pressing and clamping mechanism, a blade trailing edge plate pressing and clamping mechanism, a blade body pressing mechanism and a base; the first blade body positioning seat and the second blade body positioning seat are fixedly arranged in parallel in the middle of the base; a blade leading edge plate positioning pin is horizontally fixedly arranged on the first blade body positioning seat; a blade spanwise edge plate tightening screw is horizontally installed on the second blade body positioning seat, and the screw end of the blade spanwise edge plate tightening screw is provided with a top Tightening block; the blade leading edge plate supporting and positioning mechanism is located on the base in front of the first blade body positioning seat; the blade trailing edge plate supporting and positioning mechanism is located on the base behind the second blade body positioning seat; the blade leading edge plate pressing and positioning mechanism is located on the base on the left side of the blade leading edge plate supporting and positioning mechanism; the blade trailing edge plate pressing and positioning mechanism is located on the base on the left side of the blade trailing edge plate supporting and positioning mechanism; the blade leading edge plate top tightening and clamping mechanism is located on the base on the right side of the blade leading edge plate supporting and positioning mechanism; the blade trailing edge plate top tightening and clamping mechanism is located on the base on the right side of the blade trailing edge plate supporting and positioning mechanism; the blade body pressing mechanism is located between the first blade body positioning seat and the second blade body positioning seat; a process reference ball is fixed on the base.

[0006] The blade leading edge plate support positioning mechanism and the blade trailing edge plate support positioning mechanism have the same structure and both include a slide seat, a slider, a cover plate, a thrust spring and a blade edge plate support block; the slide seat is fixedly mounted on the base, a slide groove is vertically provided inside the slide seat, and the slider is located in the slide groove; the cover plate is located outside the slide groove and is fixedly mounted on the slide seat; a blind hole facing vertically downward is provided inside the slider, the thrust spring is located in the blind hole, the top end of the thrust spring is in contact with the bottom of the blind hole, and the bottom end of the thrust spring is in contact with the base; a slider limit screw is horizontally installed on the side of the slide seat, a limit slot is provided on the side of the slider, and the slider limit screw extends into the limit slot; the blade edge plate support block is located above the slide seat, and the bottom center of the blade edge plate support block is hinged to the top of the slider through an axle pin.

[0007] The blade leading edge plate clamping and positioning mechanism and the blade trailing edge plate clamping and positioning mechanism have the same structure, both of which include a positioning support, an L-shaped clamping arm, a clamping screw, a clamping head and a reset spring; the positioning support is fixedly mounted on the base, and a clamping arm plug-in hole facing vertically upward is provided inside the positioning support; the vertical support arm of the L-shaped clamping arm is located in the clamping arm plug-in hole; the clamping head is fixedly mounted below the end of the horizontal support arm of the L-shaped clamping arm; a three-step stepped through hole is provided in the center of the vertical support arm of the L-shaped clamping arm, and the three-step stepped through holes are provided in the center of the vertical support arm of the L-shaped clamping arm. The diameter of the middle-level channel is the smallest; the nut of the clamping screw is located in the uppermost channel of the three-level stepped through hole, and the screw rod of the clamping screw passes through the middle-level channel and the lowermost channel of the three-level stepped through hole in turn and is screwed together with the positioning support; the reset spring is sleeved on the outside of the screw rod of the clamping screw and is located in the lowermost channel of the three-level stepped through hole, the upper end of the reset spring is in contact with the vertical support arm of the L-shaped clamping arm, and the lower end of the reset spring is in contact with the positioning support; a clamping arm swing limit pin is vertically installed on the top of the positioning support.

[0008] The blade leading edge plate pressing and clamping mechanism and the blade trailing edge plate pressing and clamping mechanism have the same structure, both of which include a support base, an L-shaped clamping arm, a clamping screw, a clamping head, a reset spring, a blade chordal edge plate clamping screw and a clamping block; the support base is fixedly mounted on the base, and a clamping arm plug-in hole facing upward is provided inside the support base; the vertical support arm of the L-shaped clamping arm is located in the clamping arm plug-in hole; the clamping head is fixedly mounted below the end of the horizontal support arm of the L-shaped clamping arm; a three-level stepped through hole is provided in the center of the vertical support arm of the L-shaped clamping arm, and the middle-level hole diameter of the three-level stepped through hole is the smallest; the clamping screw The nut is located in the uppermost channel of the three-level stepped through hole, and the screw rod of the clamping screw passes through the middle channel and the lowermost channel of the three-level stepped through hole in sequence and is screwed together with the positioning support; the reset spring is sleeved on the outside of the screw rod of the clamping screw and is located in the lowermost channel of the three-level stepped through hole, the upper end of the reset spring is in contact with the vertical support arm of the L-shaped clamping arm, and the lower end of the reset spring is in contact with the positioning support; the blade chordal edge plate tightening screw is horizontally installed on the support base, and the tightening block is installed on the screw end of the blade chordal edge plate tightening screw; a clamping arm swing limit pin is vertically installed on the top of the support base.

[0009] The blade clamping mechanism includes a column, a clamping beam, a hinge ear seat, a stud, a clamping nut and a blade clamping plate; the bottom end of the column is fixedly connected to the base; one end of the clamping beam is hinged to the top end of the column, and a U-shaped slot is provided at the other end of the clamping beam; the hinge ear seat is fixedly mounted on the base; the bottom end of the stud is hinged to the hinge ear seat, and the stud is fitted with the U-shaped slot on the clamping beam; the clamping nut is screwed to the top end of the stud; the center of the top end of the blade clamping plate is hinged to the middle part of the clamping beam, and the lower surface of the blade clamping plate has the same profile structure as the blade surface of the fan stator blade.

[0010] Beneficial effects of the present invention:

[0011] The fixture for process benchmark processing of fan stator blades of the present invention, based on the six-point positioning principle, can greatly improve the reliability and stability of positioning and clamping of fan stator blade rough materials, avoid position instability or even positioning deviation of fan stator blade rough materials due to milling force, effectively improve the part processing qualification rate of fan stator blades in the first processing procedure, and reduce the cost of process benchmark processing of fan stator blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an isometric view of a fixture for processing the process benchmark of a fan stator blade according to the present invention;

[0013] Figure 2 A top-side view of a fixture for processing the process benchmark of a fan stator blade according to the present invention (partial cross-section of the blade body clamping mechanism);

[0014] Figure 3 It is a structural cross-sectional view of the blade leading / trailing edge plate supporting and positioning mechanism of the present invention;

[0015] Figure 4 It is a structural cross-sectional view of the blade leading / trailing edge plate pressing and positioning mechanism of the present invention;

[0016] Figure 5 It is a structural cross-sectional view of the blade leading / trailing edge plate pressing mechanism of the present invention;

[0017] Figure 6 It is an axonometric view of the blade body pressing mechanism of the present invention;

[0018] Figure 7 It is the axonometric view of the fan stator blade;

[0019] In the figure, 1 is the first blade body positioning seat, 2 is the second blade body positioning seat, 3 is the blade leading edge plate supporting positioning mechanism, 4 is the blade trailing edge plate supporting positioning mechanism, 5 is the blade leading edge plate pressing positioning mechanism, 6 is the blade trailing edge plate pressing positioning mechanism, 7 is the blade leading edge plate top tightening and clamping mechanism, 8 is the blade trailing edge plate top tightening and clamping mechanism, 9 is the blade body pressing mechanism, 10 is the base, 11 is the blade leading edge plate positioning pin, 12 is the blade span edge plate top tightening screw, 13 is the process reference ball, 14 is the slideway seat, 15 is the slider, 16 is the cover plate, 17 is the thrust spring, 18 is the blade edge plate support block, 19 is the —slide groove, 20—blind hole, 21—slider limit screw, 22—limiting slot, 23—axle pin, 24—positioning support, 25—L-shaped clamping arm, 26—clamping screw, 27—clamping head, 28—reset spring, 29—clamping arm plug-in hole, 30—three-level stepped through hole, 31—support base, 32—blade chord edge plate tightening screw, 33—clamping block, 34—column, 35—clamping beam, 36—hinge ear seat, 37—stud, 38—clamping nut, 39—blade body clamping plate, 40—U-shaped slot, 41—fan stator blade, 42—clamping arm swing limit pin. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 6As shown, a fixture for process benchmark processing of fan stator blades comprises a first blade body positioning seat 1, a second blade body positioning seat 2, a blade leading edge plate supporting positioning mechanism 3, a blade trailing edge plate supporting positioning mechanism 4, a blade leading edge plate pressing positioning mechanism 5, a blade trailing edge plate pressing positioning mechanism 6, a blade leading edge plate pressing and clamping mechanism 7, a blade trailing edge plate pressing and clamping mechanism 8, a blade body pressing mechanism 9 and a base 10; the first blade body positioning seat 1 and the second blade body positioning seat 2 are fixedly arranged in parallel at the middle of the base 10; a blade leading edge plate positioning pin 11 is horizontally fixedly arranged on the first blade body positioning seat 1; a blade spanwise edge plate tightening screw 12 is horizontally installed on the second blade body positioning seat 2, and a tightening block is arranged at the screw end of the blade spanwise edge plate tightening screw 12; the blade leading edge plate supporting positioning seat 2 The positioning mechanism 3 is located on the base 10 in front of the first blade body positioning seat 1; the blade trailing edge plate supporting and positioning mechanism 4 is located on the base 10 behind the second blade body positioning seat 2; the blade leading edge plate pressing and positioning mechanism 5 is located on the base 10 on the left side of the blade leading edge plate supporting and positioning mechanism 3; the blade trailing edge plate pressing and positioning mechanism 6 is located on the base 10 on the left side of the blade trailing edge plate supporting and positioning mechanism 4; the blade leading edge plate pressing and clamping mechanism 7 is located on the base 10 on the right side of the blade leading edge plate supporting and positioning mechanism 3; the blade trailing edge plate pressing and clamping mechanism 8 is located on the base 10 on the right side of the blade trailing edge plate supporting and positioning mechanism 4; the blade body pressing mechanism 9 is located between the first blade body positioning seat 1 and the second blade body positioning seat 2; and a process reference ball 13 is fixedly provided on the base 10.

[0022] The blade leading edge plate support and positioning mechanism 3 and the blade trailing edge plate support and positioning mechanism 4 have the same structure and both include a slide seat 14, a slider 15, a cover plate 16, a thrust spring 17 and a blade edge plate support block 18; the slide seat 14 is fixedly mounted on the base 10, a slide groove 19 is vertically provided inside the slide seat 14, and the slider 15 is located in the slide groove 19; the cover plate 16 is located outside the slide groove 19 and is fixedly mounted on the slide seat 14; a vertical downward blind hole 20 is opened inside the slider 15, and the thrust spring 17 is provided in the slider 15. The thrust spring 17 is located in the blind hole 20, the top end of the thrust spring 17 is in contact with the bottom of the blind hole 20, and the bottom end of the thrust spring 17 is in contact with the base 10; a slider limit screw 21 is horizontally installed on the side of the slide seat 14, and a limit slot 22 is provided on the side of the slider 15, and the slider limit screw 21 extends into the limit slot 22; the blade edge plate support block 18 is located above the slide seat 14, and the bottom center of the blade edge plate support block 18 is hinged to the top of the slider 15 through an axle pin 23.

[0023] The blade leading edge plate clamping and positioning mechanism 5 and the blade trailing edge plate clamping and positioning mechanism 6 have the same structure, and both include a positioning support 24, an L-shaped clamping arm 25, a clamping screw 26, a clamping head 27 and a reset spring 28; the positioning support 24 is fixedly mounted on the base 10, and a vertical upward clamping arm plug-in hole 29 is provided inside the positioning support 24; the vertical support arm of the L-shaped clamping arm 25 is located in the clamping arm plug-in hole 29; the clamping head 27 is fixedly mounted below the end of the horizontal support arm of the L-shaped clamping arm 25; the vertical support arm of the L-shaped clamping arm 25 is provided with a three-step stepped through hole 30 in the center, and the three-step stepped through holes The diameter of the middle-level channel of 30 is the smallest; the nut of the clamping screw 26 is located in the uppermost channel of the three-level stepped through hole 30, and the screw of the clamping screw 26 passes through the middle-level channel and the lowermost channel of the three-level stepped through hole 30 in turn and is screwed together with the positioning support 24; the reset spring 28 is sleeved on the outside of the screw of the clamping screw 26 and is located in the lowermost channel of the three-level stepped through hole 30, the upper end of the reset spring 28 is in contact with the vertical support arm of the L-shaped clamping arm 25, and the lower end of the reset spring 28 is in contact with the positioning support 24; a clamping arm swing limit pin 42 is vertically installed on the top of the positioning support 24.

[0024] The blade leading edge plate pressing mechanism 7 and the blade trailing edge plate pressing mechanism 8 have the same structure and both include a support base 31, an L-shaped pressing arm 25, a pressing screw 26, a pressing head 27, a reset spring 28, a blade chord-wise edge plate pressing screw 32 and a pressing block 33; the support base 31 is fixedly mounted on the base 10, and a vertical upward pressing arm plug-in hole 29 is provided inside the support base 31; the vertical support arm of the L-shaped pressing arm 25 is located in the pressing arm plug-in hole 29; the pressing head 27 is fixedly mounted below the horizontal support arm end of the L-shaped pressing arm 25; a three-stage stepped through hole 30 is provided in the center of the vertical support arm of the L-shaped pressing arm 25, and the middle stage channel diameter of the three-stage stepped through hole 30 is the smallest; the pressing screw The nut of the nail 26 is located in the uppermost channel of the three-level stepped through hole 30, and the screw of the clamping screw 26 passes through the middle channel and the lowermost channel of the three-level stepped through hole 30 in sequence and is screwed together with the positioning support 24; the reset spring 28 is sleeved on the outside of the screw of the clamping screw 26 and is located in the lowermost channel of the three-level stepped through hole 30, the upper end of the reset spring 28 is in contact with the vertical support arm of the L-shaped clamping arm 25, and the lower end of the reset spring 28 is in contact with the positioning support 24; the blade chord-to-edge plate tightening screw 32 is horizontally installed on the support base 31, and the tightening block 33 is installed at the screw end of the blade chord-to-edge plate tightening screw 32; a clamping arm swing limit pin 42 is vertically installed on the top of the support base 31.

[0025] The blade clamping mechanism 9 includes a column 34, a clamping beam 35, a hinge ear seat 36, a stud 37, a clamping nut 38 and a blade clamping plate 39; the bottom end of the column 34 is fixedly connected to the base 10; one end of the clamping beam 35 is hinged to the top of the column 34, and a U-shaped slot 40 is provided at the other end of the clamping beam 35; the hinge ear seat 36 is fixedly mounted on the base 10; the bottom end of the stud 37 is hinged to the hinge ear seat 36, and the stud 37 is snap-fitted with the U-shaped slot 40 on the clamping beam 35; the clamping nut 38 is screwed to the top of the stud 37; the top center of the blade clamping plate 39 is hinged to the middle of the clamping beam 35, and the lower surface of the blade clamping plate 39 has the same profile structure as the blade surface of the fan stator blade 41.

[0026] The following describes a one-time use process of the present invention in conjunction with the accompanying drawings:

[0027] First, the base 10 of the clamp of the present invention is fixedly installed on the workbench of the milling machine. In the initial state, all four L-shaped clamping arms 25 of the clamp of the present invention are swung to point to the outside of the clamp. At the same time, the clamping beam 35 and the stud 37 are in a non-connected state and are also swung to the outside of the clamp to park, so that the top of the base 10 is in a clear state to facilitate the installation of the fan stator blades 41.

[0028] First, Figure 7 The fan stator blade 41 shown is placed horizontally above the base 10, and the first blade body positioning seat 1 and the second blade body positioning seat 2 provide preliminary positioning support for the blade body part, while ensuring that the leading edge plate of the fan stator blade 41 is pressed on the blade edge plate support block 18 of the blade leading edge plate support positioning mechanism 3, and the trailing edge plate of the fan stator blade 41 is pressed on the blade edge plate support block 18 of the blade trailing edge plate support positioning mechanism 4. Since the blade edge plate support block 18 is hingedly connected to the slider 15, the blade edge plate support block 18 can adaptively swing along with the leading and trailing edge plates of the blades. At the same time, under the action of the deadweight pressure of the blades, the slider 15 overcomes the spring force of the thrust spring 17 and can adaptively move up and down along the slide groove 19 in the slide seat 14.

[0029] Then, the positioning position of the fan stator blade 41 is finely adjusted so that the inner surface of the leading edge plate of the fan stator blade 41 is pressed against the blade leading edge plate positioning pin 11, the left end side elevation of the leading edge plate of the fan stator blade 41 is pressed against the positioning support 24 of the blade leading edge plate pressing and positioning mechanism 5, and the left end side elevation of the trailing edge plate of the fan stator blade 41 is pressed against the positioning support 24 of the blade trailing edge plate pressing and positioning mechanism 6. At this time, the six-point positioning of the fan stator blade 41 is completed.

[0030] After the fan stator blade 41 completes the six-point positioning, first tighten the blade span-wise edge plate tightening screw 12 until the tightening block at the screw end of the blade span-wise edge plate tightening screw 12 contacts the front surface of the blade trailing edge plate, then tighten the blade span-wise edge plate tightening screw 12 to complete the fixation of the blade trailing edge plates in the blade span direction.

[0031] After the blade leading and trailing edge plates are fixed in the blade span direction, first screw the blade chord-direction edge plate pressing screw 32 in the blade leading edge plate pressing and clamping mechanism 7 until the pressing block 33 at the end of the screw rod of the blade chord-direction edge plate pressing screw 32 contacts the right end side elevation of the blade leading edge plate, then tighten the blade chord-direction edge plate pressing screw 32 to fix the blade leading edge plate in the blade chord direction. Then screw the blade chord-direction edge plate pressing screw 32 in the blade trailing edge plate pressing and clamping mechanism 8 until the pressing block 33 at the end of the screw rod of the blade chord-direction edge plate pressing screw 32 contacts the right end side elevation of the blade trailing edge plate, then tighten the blade chord-direction edge plate pressing screw 32 to fix the blade trailing edge plate in the blade chord direction.

[0032] After the front and rear edge plates of the blade are fixed in the chord direction of the blade, the four L-shaped clamping arms 25 are swung back to the inside of the clamp so that the horizontal support arms of the L-shaped clamping arms 25 are laterally abutted against the clamping arm swing limit pin 42 to complete the positioning of the L-shaped clamping arms 25. At this time, the clamping heads 27 on the four L-shaped clamping arms 25 can be accurately located above the front and rear edge plates of the blade. Then, the clamping screws 26 are tightened to drive the L-shaped clamping arms 25 to move downward until the clamping heads 27 contact the front and rear edge plates of the blade. Then, the clamping screws 26 are tightened until the front and rear edge plates of the blade are fixed in the vertical direction.

[0033] After the front and rear edge plates of the blades are fixed in the vertical direction, the clamping beam 35 is flipped toward the inside of the clamp until it is horizontal, so that the blade body clamping plate 39 contacts the blade body of the fan stator blade 41. At the same time, the stud 37 is flipped toward the inside of the clamp until it is vertical, so that the stud 37 is inserted into the U-shaped slot 40, and then the clamping nut 38 is screwed until the clamping nut 38 contacts the clamping beam 35, and then the clamping nut 38 is tightened to complete the fixation of the blade body in the vertical direction.

[0034] Finally, tighten the slider limit screws 21 in the blade leading edge plate support positioning mechanism 3 and the blade trailing edge plate support positioning mechanism 4 respectively to complete the locking of the slider 15. After the slider 15 is locked, the blade edge plate support block 18 can provide stable and reliable support for the blade leading and trailing edge plates.

[0035] After all the above-mentioned preparatory work is completed, the fan stator blades 41 in the fixture of the present invention can be subjected to process benchmark processing by a milling machine. Since the fan stator blades 41 are stably and reliably clamped and positioned in the fixture of the present invention, the position instability or even positioning deviation of the rough material of the fan stator blades 41 caused by the milling force is avoided, thereby effectively improving the parts processing qualification rate of the fan stator blades 41 in the first processing procedure, and reducing the cost of process benchmark processing of the fan stator blades 41.

[0036] The solutions in the embodiments are not intended to limit the patent protection scope of the present invention. All equivalent implementations or changes that do not deviate from the present invention are included in the patent scope of this case.

Claims

1. A fixture for processing the process benchmark of fan stator blades, Features: The blade body comprises a first blade body positioning seat, a second blade body positioning seat, a blade leading edge plate supporting and positioning mechanism, a blade trailing edge plate supporting and positioning mechanism, a blade leading edge plate pressing and positioning mechanism, a blade trailing edge plate pressing and positioning mechanism, a blade leading edge plate pressing and pressing mechanism, a blade trailing edge plate pressing and pressing mechanism, a blade body pressing mechanism and a base; the first blade body positioning seat and the second blade body positioning seat are fixedly arranged in parallel in the middle of the base; a blade leading edge plate positioning pin is fixedly arranged horizontally on the first blade body positioning seat; a blade spanwise edge plate pressing screw is horizontally installed on the second blade body positioning seat, and a first pressing block is arranged at the end of the screw rod of the blade spanwise edge plate pressing screw; the blade leading edge plate supporting and positioning mechanism is located at On the base in front of the first blade body positioning seat; the blade trailing edge plate supporting and positioning mechanism is located on the base behind the second blade body positioning seat; the blade leading edge plate pressing and positioning mechanism is located on the base on the left side of the blade leading edge plate supporting and positioning mechanism; the blade trailing edge plate pressing and positioning mechanism is located on the base on the left side of the blade trailing edge plate supporting and positioning mechanism; the blade leading edge plate pressing and clamping mechanism is located on the base on the right side of the blade leading edge plate supporting and positioning mechanism; the blade trailing edge plate pressing and clamping mechanism is located on the base on the right side of the blade trailing edge plate supporting and positioning mechanism; the blade body pressing mechanism is located between the first blade body positioning seat and the second blade body positioning seat; a process reference ball is fixed on the base; The blade leading edge plate support positioning mechanism and the blade trailing edge plate support positioning mechanism have the same structure, both of which include a slide seat, a slider, a cover plate, a thrust spring and a blade edge plate support block; the slide seat is fixedly mounted on the base, a slide slot is vertically provided inside the slide seat, and the slide block is located in the slide slot; the cover plate is located outside the slide slot and is fixedly mounted on the slide seat; a vertically downward blind hole is provided inside the slide block, the thrust spring is located in the blind hole, the top end of the thrust spring is in contact with the bottom of the blind hole, and the bottom end of the thrust spring is in contact with the base; a slider limit screw is horizontally installed on the side of the slide seat, a limit slot is provided on the side of the slide block, and the slider limit screw extends into the limit slot; the blade edge plate support block is located above the slide seat, and the bottom center of the blade edge plate support block is hinged to the top of the slide block through an axle pin; The blade leading edge plate clamping and positioning mechanism and the blade trailing edge plate clamping and positioning mechanism have the same structure, both of which include a positioning support, a first L-shaped clamping arm, a first clamping screw, a first clamping head and a first return spring; the positioning support is fixedly mounted on the base, and a first clamping arm plug-in hole facing vertically upward is provided inside the positioning support; the vertical support arm of the first L-shaped clamping arm is located in the first clamping arm plug-in hole; the first clamping head is fixedly mounted below the end of the horizontal support arm of the first L-shaped clamping arm; a first three-step stepped through hole is provided in the center of the vertical support arm of the first L-shaped clamping arm, and the first three-step stepped through hole The diameter of the middle-level hole is the smallest; the nut of the first clamping screw is located in the uppermost hole of the first three-level stepped through hole, and the screw rod of the first clamping screw passes through the middle-level hole and the lowermost hole of the first three-level stepped through hole in sequence and is screwed together with the positioning support; the first return spring is sleeved on the outside of the screw rod of the first clamping screw and is located in the lowermost hole of the first three-level stepped through hole, the upper end of the first return spring is in contact with the vertical support arm of the first L-shaped clamping arm, and the lower end of the first return spring is in contact with the positioning support; a first clamping arm swing limit pin is vertically installed on the top of the positioning support; The blade leading edge plate pressing and clamping mechanism and the blade trailing edge plate pressing and clamping mechanism have the same structure, both of which include a support base, a second L-shaped pressing arm, a second pressing screw, a second pressing head, a second return spring, a blade chord-wise edge plate pressing screw and a second pressing block; the support base is fixedly mounted on the base, and a second pressing arm plug-in hole facing vertically upward is provided inside the support base; the vertical support arm of the second L-shaped pressing arm is located in the second pressing arm plug-in hole; the second pressing head is fixedly mounted below the end of the horizontal support arm of the second L-shaped pressing arm; a second third-level stepped through hole is provided in the center of the vertical support arm of the second L-shaped pressing arm, and the middle-level channel diameter of the second third-level stepped through hole is the smallest; the second pressing The nut of the tightening screw is located in the uppermost channel of the second-three-level stepped through hole, and the screw rod of the second clamping screw passes through the middle channel and the lowermost channel of the second-three-level stepped through hole in sequence and is screwed together with the positioning support; the second return spring is sleeved on the outside of the screw rod of the second clamping screw and is located in the lowermost channel of the second-three-level stepped through hole, the upper end of the second return spring is in contact with the vertical support arm of the second L-shaped clamping arm, and the lower end of the second return spring is in contact with the positioning support; the blade chordal edge plate tightening screw is horizontally installed on the support base, and the second tightening block is installed on the screw end of the blade chordal edge plate tightening screw; a second clamping arm swing limit pin is vertically installed on the top of the support base.

2. A fixture for processing the process benchmark of a fan stator blade according to claim 1, Features: The blade clamping mechanism includes a column, a clamping beam, a hinge ear seat, a stud, a clamping nut and a blade clamping plate; the bottom end of the column is fixedly connected to the base; one end of the clamping beam is hinged to the top end of the column, and a U-shaped slot is provided at the other end of the clamping beam; the hinge ear seat is fixedly mounted on the base; the bottom end of the stud is hinged to the hinge ear seat, and the stud is fitted with the U-shaped slot on the clamping beam; the clamping nut is screwed to the top end of the stud; the center of the top end of the blade clamping plate is hinged to the middle part of the clamping beam, and the lower surface of the blade clamping plate has the same profile structure as the blade surface of the fan stator blade.

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