Multi-point fixed type clamping tool for machining duplex blade of heavy duty gas turbine

Abstract

The invention provides a multi-point fixed type clamping tool for machining a duplex blade of a heavy duty gas turbine, and relates to the field of clamping tools. The multi-point fixing type clamping tool for machining the duplex blades of the heavy duty gas turbine comprises a base and a supporting plate arranged at the position, close to the rear side, of the upper end face of the base, the two sides of the supporting plate are each provided with two mounting grooves, and each mounting groove is internally provided with a side edge clamping structure; a jacking hydraulic cylinder is fixedly arranged at the center of the rear side of the supporting plate, the movable end of the jacking hydraulic cylinder penetrates through the supporting plate and is fixedly connected with a center fixing structure, and the four side edge clamping structures are matched with the center fixing structure to conduct multi-point clamping and fixing on a drilling plate of a duplex blade workpiece. Through the four side edge clamping structures and the center fixing structure, one side edge plate of the special-shaped duplex blade can be clamped and fixed, so that the edge of the other side edge plate is convenient to polish, the device adopts multi-point clamping and fixing, stable clamping of a large workpiece can be guaranteed, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of clamping tooling, and particularly to a multi-point fixed clamping tooling for machining double-blade of heavy-duty gas turbines. Background Art

[0002] A gas turbine is an internal combustion power machine that uses continuously flowing gas as the working medium to drive the impeller to rotate at high speed, converting the energy of fuel into useful work, and is a rotating impeller type thermal engine. At present, the impeller of a gas turbine commonly uses a double or triple combined worm guide vane structure. Among them, the double blade generally consists of an upper flange plate, a lower flange plate, and a blade body connected between the two. The processed double blades are fixed together by welding to form an integral structure.

[0003] With the development of current technology, the size of gas turbines is getting larger and larger. For current heavy-duty gas turbines, due to their large size, their double blades have also become larger and heavier, and the double blades are special-shaped workpieces, resulting in the inability of ordinary fixtures to complete the corresponding clamping work during the machining process. During the machining of double blades, it is necessary to grind the edges and corners of their upper and lower flange plates to ensure precise subsequent welding. Ordinary fixtures are not convenient for grinding work during clamping. Therefore, it is necessary to design a special fixture for clamping to facilitate grinding and machining. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a multi-point fixed clamping tooling for machining double-blades of heavy-duty gas turbines, which solves the problems that existing ordinary fixtures cannot stably clamp the double-blades of heavy-duty gas turbines and are not convenient for blade grinding work.

[0006] (II) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A multi-point fixed clamping tooling for machining double-blades of heavy-duty gas turbines includes a base and a support plate arranged at the rear side of the upper end surface of the base. Two installation grooves are opened on both sides of the support plate, and a side clamping structure is arranged in each installation groove. A jacking hydraulic cylinder is fixedly arranged at the center of the rear side of the support plate. The movable end of the jacking hydraulic cylinder penetrates the support plate and is fixedly connected with a central fixing structure. Four side clamping structures cooperate with the central fixing structure to perform multi-point clamping and fixing on the flange plates of the double-blade workpiece;

[0008] Side fixing plates are fixedly arranged on both sides of the support plate. A bottom groove is opened inside the base directly below the support plate, and a side lifting assembly is arranged in the bottom groove. A rear lifting structure is arranged on the base at the rear side of the support plate to assist in lifting and supporting the support plate.

[0009] Preferably, the central fixing structure includes a housing. Four first sliding grooves are longitudinally formed at the inner end of the housing. A ejector rod is arranged at the inner end of each first sliding groove. The top end of the ejector rod penetrates through the front side of the housing. A first spring is fixedly connected to the bottom end of the ejector rod. An electric cylinder placement groove is formed in the center of the housing. An electric cylinder is arranged in the electric cylinder placement groove. Four positioning rod installation grooves are transversely formed in the center of the housing. The two ends of the four positioning rod installation grooves are respectively communicated with the electric cylinder placement groove and the first sliding groove. A positioning rod is arranged in the positioning rod installation groove. A second spring is arranged on the rod body of the positioning rod. One end of the second spring is fixed to the rod body of the positioning rod. A plurality of positioning grooves are formed on the side wall of the ejector rod close to the center of the housing. The positioning grooves can cooperate with one end of the positioning rod.

[0010] Preferably, the housing is composed of upper and lower housing parts connected by screws. The position of the positioning rod installation groove is the joint of the upper and lower housing parts.

[0011] Preferably, the side clamping structure includes a first mounting plate, a first hydraulic cylinder, a second hydraulic cylinder, a first slider and a clamping buckle. The first hydraulic cylinder is fixed on one side wall of the first mounting plate. The first mounting plate is fixed on the rear wall of the support plate. The first slider is fixedly connected to the output end of the first hydraulic cylinder and is slidably arranged at the inner end of the installation groove. The second hydraulic cylinder is fixedly installed on the rear wall of the first slider. The output end of the second hydraulic cylinder penetrates through the first slider and reaches the front end of the support plate. The clamping buckle is fixed on the output end of the second hydraulic cylinder.

[0012] Preferably, two reinforcing sliding rods are also fixedly connected to the first mounting plate. The two reinforcing sliding rods are arranged on both sides of the first hydraulic cylinder. The other ends of the reinforcing sliding rods penetrate through the first slider and are connected with a second mounting plate. The second mounting plate is fixed on the side fixing plate. Auxiliary sliding grooves are also formed on both sides of the installation groove. Both sides of the first slider are slidably matched in the auxiliary sliding grooves.

[0013] Preferably, the clamping buckles on both sides of the support plate are symmetrically arranged. An anti-slip pad made of rubber is arranged on the inner side of the clamping buckle.

[0014] Preferably, the side lifting assembly includes side threaded sleeves, worm gears, worm shafts, a first motor, and a first screw rod. A worm shaft is rotatably arranged between the two side walls of the first screw rod. The first motor is fixed on one side wall of the base. The output end of the first motor is connected to one end of the worm shaft. Two side threaded sleeves are respectively fixed at the lower side near the outer side of the side fixing plate. The first screw rod is in threaded connection with the inner end of the side threaded sleeve. The first screw rod is rotatably connected to the base through a bearing. The bottom end of the first screw rod penetrates through the base and reaches the inner end of the bottom groove. A worm gear is fixedly connected to the bottom end of the first screw rod. The worm gear is engaged with the worm shaft.

[0015] Preferably, the rear lifting structure includes a second motor, a second screw, a second slide groove opened on the upper surface of the base, a second slider, a third mounting plate support seat, a support rod, a connecting rod, and a connecting plate. The second motor and the third mounting plate are fixed to the base, one end of the second screw is connected to the output end of the second motor, and the other end is connected to the side wall of the second mounting plate. The second slider slides in a sliding manner at the inner end of the second slide groove and is threadedly sleeved on the second screw. The support seat is fixed to the top of the second slider, and the support rod is rotatably connected to the inner end of the support seat. Two connecting rods are provided, one end of the connecting rod is fixedly connected to one end of the support rod, and the other end is hinged to the connecting plate, and the connecting plate is fixedly connected to the rear wall of the support plate.

[0016] Preferably, the support plate has two limiting holes formed inside near the center, and the inner ends of the two limiting holes are both provided with auxiliary limiting rods, and the bottom ends of the auxiliary limiting rods are fixedly connected to the upper end surface of the base.

[0017] (III) Beneficial effects

[0018] The present invention provides a multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine. It has the following beneficial effects:

[0019] 1. The device proposed in the present invention can clamp and fix one side edge plate of the double-linked blade by means of the four side clamping structures and the center fixing structure, thereby facilitating the edge grinding of the other side edge plate. When in use, the center fixing structure extends out to support the middle part of the edge plate, and then the four side clamping structures cooperate to pull the edge of the edge plate backwards through the supporting buckle, thereby clamping and fixing one edge plate of the double-linked blade, and then the side lifting assembly and the rear lifting structure are used to lift the workpiece to facilitate subsequent processing. This design is aimed at the special-shaped edge plate of the double-linked blade to ensure stable clamping.

[0020] 2. The center fixing structure in the present invention has a multi-fixed-point limiting function. When in use, when a number of push rods contact the center of the outer edge plate of the double-linked blade, a number of push rods will extend to different lengths through the action of the spring to ensure that each push rod is in contact with the edge plate surface. At this time, by controlling the movable end of the electric cylinder to extend, a number of positioning rods are squeezed so that the other end of the positioning rod is stuck in the positioning groove on the push rod to fix the position of the push rod. At this time, the center fixing structure is completely in contact with the rear side of the special-shaped edge plate of the double-linked blade. The edge plate can be completely clamped by controlling the clamping buckle of the side clamping structure to move backward to ensure that there will be no shaking during the processing.

[0021] 3. The structure of the present invention is provided with two sets of lifting structures on the side and the rear to achieve the lifting of the workpiece, ensuring stable lifting and enhancing the supporting effect. At the same time, a reinforcing sliding rod is arranged in the side clamping structure to ensure that the device can stably clamp workpieces with large weights and ensure safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional view of the structure of the present invention;

[0023] Figure 2 is another three-dimensional view of the structure of the present invention from a different perspective;

[0024] Figure 3 is a top view of the structure of the present invention;

[0025] Figure 4 is a bottom view of the structure of the present invention;

[0026] Figure 5 is a schematic cross-sectional view of the support plate structure of the present invention;

[0027] Figure 6 is a schematic cross-sectional view of the central fixing structure of the present invention;

[0028] Figure 7 is Figure 2 an enlarged view of part A in

[0029] Figure 8 is Figure 2 an enlarged view of part B in

[0030] Figure 9 is a schematic view of the present invention in the state of clamping double-connected blades.

[0031] Wherein, 1. Base; 2. Support plate; 3. Installation groove; 4. Side clamping structure; 5. Jacking hydraulic cylinder; 6. Central fixing structure; 7. Rear lifting structure; 8. Side thread sleeve; 9. Bottom groove; 10. Worm gear; 11. First motor; 12. Worm; 13. First screw; 14. Side fixing plate; 15. Limiting hole; 16. Auxiliary limiting rod; 401. First mounting plate; 402. Second mounting plate; 403. Reinforcing sliding rod; 404. First hydraulic cylinder; 405. First slider; 406. Auxiliary sliding groove; 407. Second hydraulic cylinder; 408. Clamping buckle; 601. Housing; 602. First sliding groove; 603. Electric cylinder placement groove; 604. Electric cylinder; 605. Jacking rod; 606. First spring; 607. Positioning groove; 608. Positioning rod mounting groove; 609. Positioning rod; 610. Second spring; 701. Second motor; 702. Second screw; 703. Second sliding groove; 704. Second slider; 705. Third mounting plate; 706. Support seat; 707. Support rod; 708. Connecting rod; 709. Connecting plate. DETAILED DESCRIPTION OF THE INVENTION

[0032] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment:

[0034] As Figure 1-9 shown, the embodiment of the present invention provides a multi-point fixed clamping tooling for machining double-link blades of a heavy-duty gas turbine, including a base 1 and a support plate 2 arranged at the rear side of the upper end surface of the base 1. Two installation grooves 3 are opened on both sides of the support plate 2, and a side clamping structure 4 is arranged in each installation groove 3. A jacking hydraulic cylinder 5 is fixedly arranged at the center of the rear side of the support plate 2. The movable end of the jacking hydraulic cylinder 5 penetrates through the support plate 2 and is fixedly connected with a central fixing structure 6. The four side clamping structures 4 cooperate with the central fixing structure 6 to perform multi-point clamping and fixing on the flanges of the double-link blade workpiece.

[0035] As Figure 7 shown, the side clamping structure 4 includes a first mounting plate 401, a first hydraulic cylinder 404, a second hydraulic cylinder 407, a first slider 405 and a clamping buckle 408. The first hydraulic cylinder 404 is fixed on one side wall of the first mounting plate 401. The first mounting plate 401 is fixed on the rear wall of the support plate 2. The first slider 405 is fixedly connected to the output end of the first hydraulic cylinder 404 and is slidably arranged at the inner end of the installation groove 3. The second hydraulic cylinder 407 is fixedly installed on the rear wall of the first slider 405, and the output end of the second hydraulic cylinder 407 penetrates through the first slider 405 and extends to the front end of the support plate 2. The clamping buckle 408 is fixed on the output end of the second hydraulic cylinder 407. The first hydraulic cylinder 404 controls the lateral position of the clamping buckle 408, and the second hydraulic cylinder 407 controls the front and rear positions of the clamping buckle 408.

[0036] Two reinforcing sliding rods 403 are also fixedly connected to the first mounting plate 401. The two reinforcing sliding rods 403 are arranged on both sides of the first hydraulic cylinder 404, and the other ends of the reinforcing sliding rods 403 penetrate through the first slider 405 and are connected with a second mounting plate 402. The second mounting plate 402 is fixed on the side fixing plate 14. Auxiliary sliding grooves 406 are also opened on both sides of the installation groove 3. The two sides of the first slider 405 are slidably matched in the auxiliary sliding grooves 406. The reinforcing sliding rods 403 and the auxiliary sliding grooves 406 make the first slider 405 more stable during the moving process and more stable when bearing external forces.

[0037] The clamping clasps 408 on both sides of the support plate 2 are symmetrically arranged. An anti-slip pad made of rubber is arranged on the inner side of the clamping clasp 408, which can prevent the edges of the double-connected blades from being worn during the clamping process.

[0038] As Figure 6 shown, the central fixing structure 6 includes a housing 601. Four first sliding grooves 602 are longitudinally formed at the inner end of the housing 601. An electric cylinder 604 is arranged at the inner end of each first sliding groove 602. The top end of the electric cylinder 604 penetrates through the front side of the housing 601. A first spring 606 is fixedly connected to the bottom end of the electric cylinder 604. An electric cylinder placement groove 603 is formed in the center of the housing 601, and the electric cylinder 604 is arranged in the electric cylinder placement groove 603. Four positioning rod installation grooves 608 are transversely formed in the center of the housing 601, and both ends of the four positioning rod installation grooves 608 are respectively communicated with the electric cylinder placement groove 603 and the first sliding groove 602. A positioning rod 609 is arranged in the positioning rod installation groove 608. A second spring 610 is arranged on the rod body of the positioning rod 609. One end of the second spring 610 is fixed to the rod body of the positioning rod 609. A plurality of positioning grooves 607 are formed on the side wall of the electric cylinder 604 close to the center of the housing 601. The positioning grooves 607 can cooperate with one end of the positioning rod 609. When the electric cylinder 604 does not work, the inner end of the positioning rod 609 extends to the inner side of the electric cylinder placement groove 603. When working, the movable end of the electric cylinder 604 extends out, squeezing the positioning rod 609 back into the positioning rod installation groove 608. The other end of the positioning rod 609 extends into the first sliding groove 602 and is clamped into the positioning groove 607 on the side wall of the ejector rod 605 to fix the position of the ejector rod 605.

[0039] The housing 601 is composed of upper and lower housing parts connected by screws. The position of the positioning rod installation groove 608 is the joint of the upper and lower housing parts, which is convenient for the installation of internal structures and the production and processing of structures.

[0040] Side fixing plates 14 are fixedly arranged on both sides of the support plate 2. The side fixing plates 14 are fixed to the support plate 2 by bolts. A bottom groove 9 is formed inside the base 1 located directly below the support plate 2, and a side lifting assembly is arranged in the bottom groove 9. A rear lifting structure 7 is arranged on the base 1 behind the support plate 2 to assist in lifting and supporting the support plate 2.

[0041] As Figure 1 、 Figure 4As shown in the figure, the side lifting assembly includes a side threaded sleeve 8, a worm gear 10, a worm 12, a first motor 11. A worm 12 is rotatably arranged between the two side walls of the first screw rod 13. The first motor 11 is fixed on one side wall of the base 1, and the output end of the first motor 11 is connected to one end of the worm 12. There are two side threaded sleeves 8, which are respectively fixed at the lower part near the outside of the side fixing plates 14. The first screw rod 13 is in mating connection with the inner end of the side threaded sleeve 8. The first screw rod 13 is rotatably connected to the base 1 through a bearing. The bottom end of the first screw rod 13 penetrates through the base 1 and reaches the inner end of the bottom groove 9. The bottom end of the first screw rod 13 is fixedly connected to the worm gear 10, and the worm gear 10 is in cooperation with the worm 12. When the first motor 11 works, it drives the worm 12 to rotate, drives the first screw rod 13 to rotate through the worm gear 10, and thus drives the side threaded sleeve 8 and its connected structure to move up and down.

[0042] As Figure 8 shown in the figure, the rear lifting structure 7 includes a second motor 701, a second screw rod 702, a second chute 703 opened on the upper surface of the base 1, a second slider 704, a third mounting plate 705, a support seat 706, a support rod 707, a connecting rod 708, and a connecting plate 709. The second motor 701 and the third mounting plate 705 are fixed on the base 1. One end of the second screw rod 702 is connected to the output end of the second motor 701, and the other end is connected to the side wall of the third mounting plate 705. The second slider 704 is slidably fitted in the inner end of the second chute 703. The support seat 706 is fixed on the top end of the second slider 704. The support rod 707 is rotatably connected to the inner end of the support seat 706. There are two connecting rods 708. One end of the connecting rod 708 is fixedly connected to one end of the support rod 707, and the other end is hinged to the connecting plate 709. The connecting plate 709 is fixedly connected to the rear wall of the support plate 2. When the second motor 701 works, it drives the second screw rod 702 to rotate, thereby driving the second slider 704 to move back and forth. During this process, the support rod 707 drives the connecting plate 709 and the support plate 2 to move up and down through the connecting rod 708.

[0043] As Figure 5 shown in the figure, two limiting holes 15 are opened inside the support plate 2 near the center, and auxiliary limiting rods 16 are arranged at the inner ends of the two limiting holes 15. The bottom ends of the auxiliary limiting rods 16 are fixedly connected to the upper end surface of the base 1, which is used for auxiliary support and auxiliary limitation of the support plate 2.

[0044] Working principle:

[0045] During use, place the double - blade workpiece to be processed on the base 1 in front of the support plate 2, and then start the lifting hydraulic cylinder 5 to drive the center fixing structure 6 to move forward. When the four ejector rods 605 contact the center of the outer edge of the double - blade, the four ejector rods 605 will extend different lengths under the action of the first spring 606 to ensure that each ejector rod 605 is in contact with the edge surface. At this time, control the movable end of the electric cylinder 604 to extend, push the positioning rod 609 back into the positioning rod installation groove 608, and the other end of the positioning rod 609 extends into the first chute 602 and is caught in the positioning groove 607 on the side wall of the ejector rod 605 to fix the position of the ejector rod 605. At this time, the center fixing structure 6 is in full contact with the rear side of the special - shaped edge of the double - blade;

[0046] Next, control the first hydraulic cylinder 404 to move the clamping buckle 408 inward until it contacts the edge of the double - blade's edge plate. Then, control the second hydraulic cylinder 407 to move the clamping buckle 408 towards the support plate 2, so that the four clamping buckles 408 pull the edge plate of the double - blade inward, and cooperate with the center fixing structure to complete the clamping of the edge plate of the double - blade;

[0047] Then, drive the support plate 2 to move upward through the side lifting assembly and the rear lifting structure 7 to lift the workpiece, and then the edge of the other edge plate of the double - blade can be polished. After completion, change sides and continue the polishing process.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine, comprising a base (1) and a support plate (2) arranged at the rear side of the upper end surface of the base (1), characterized in that: Two mounting grooves (3) are provided on both sides of the support plate (2), and a side clamping structure (4) is provided in each of the mounting grooves (3). A lifting hydraulic cylinder (5) is fixedly provided at the rear center of the support plate (2), and the movable end of the lifting hydraulic cylinder (5) passes through the support plate (2) and is fixedly connected to a center fixing structure (6). The four side clamping structures (4) cooperate with the center fixing structure (6) to clamp and fix the edge plate of the double-blade workpiece at multiple points. Side fixing plates (14) are fixedly arranged on both sides of the support plate (2); a bottom groove (9) is provided inside the base (1) directly below the support plate (2); a side lifting assembly is arranged inside the bottom groove (9); and a rear lifting structure (7) is arranged on the base (1) at the rear side of the support plate (2) to assist in lifting and supporting the support plate (2).

2. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 1 is characterized in that: The central fixed structure (6) comprises a shell (601), the inner end of which is longitudinally provided with four first slide grooves (602), the inner end of each of which is provided with a push rod (605), the top end of which passes through the front side of the shell (601), the bottom end of which is fixedly connected with a first spring (606), the center of which is provided with an electric cylinder placement groove (603), the electric cylinder (604) being provided in the electric cylinder placement groove (603), and the center of which is provided with four fixed grooves (601) transversely. A positioning rod installation groove (608) is provided, and the two ends of the four positioning rod installation grooves (608) are respectively connected to the electric cylinder placement groove (603) and the first slide groove (602); a positioning rod (609) is arranged in the positioning rod installation groove (608); a second spring (610) is arranged on the rod body of the positioning rod (609); one end of the second spring (610) is fixed to the rod body of the positioning rod (609); a plurality of positioning grooves (607) are opened on a side wall of the push rod (605) close to the center of the shell (601); the positioning groove (607) can cooperate with one end of the positioning rod (609).

3. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 2 is characterized in that: The housing (601) is composed of an upper and lower housing part connected by screws, and the positioning rod installation groove (608) is located at the junction of the upper and lower housing parts.

4. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 1 is characterized in that: The side clamping structure (4) comprises a first mounting plate (401), a first hydraulic cylinder (404), a second hydraulic cylinder (407), a first slider (405) and a clamping buckle (408); the first hydraulic cylinder (404) is fixed on a side wall of the first mounting plate (401); the first mounting plate (401) is fixed on a rear wall of the support plate (2); the first slider (405) is fixedly connected to an output end of the first hydraulic cylinder (404) and is slidably arranged at an inner end of the mounting groove (3); the second hydraulic cylinder (407) is fixedly mounted on the rear wall of the first slider (405); the output end of the second hydraulic cylinder (407) passes through the first slider (405) and reaches a front end of the support plate (2); and the clamping buckle (408) is fixed on the output end of the second hydraulic cylinder (407).

5. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 4 is characterized in that: Two reinforcing slide bars (403) are also fixedly connected to the first mounting plate (401), and the two reinforcing slide bars (403) are arranged on both sides of the first hydraulic cylinder (404). The other end of the reinforcing slide bar (403) passes through the first slider (405) and is connected to the second mounting plate (402). The second mounting plate (402) is fixed to the side fixing plate (14). Auxiliary slide bars (406) are also provided on both sides of the mounting groove (3), and both sides of the first slider (405) cooperate to slide in the auxiliary slide bars (406).

6. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 4 is characterized in that: The clamping buckles (408) located on both sides of the support plate (2) are symmetrically arranged, and the inner sides of the clamping buckles (408) are provided with anti-slip pads made of rubber.

7. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 1 is characterized in that: The side lifting assembly comprises a side threaded sleeve (8), a worm wheel (10), a worm (12), a first motor (11), and a first screw (13), between which a worm (12) is rotatably arranged on both side walls. The first motor (11) is fixed on one side wall of the base (1), and the output end of the first motor (11) is connected to one end of the worm (12). The side threaded sleeve (8) is provided with two outer sides of two side fixing plates (14) respectively fixed thereto. The first screw (13) is connected to the inner end of the side threaded sleeve (8). The first screw (13) is rotatably connected to the base (1) via a bearing. The bottom end of the first screw (13) passes through the base (1) and reaches the inner end of the bottom groove (9). The bottom end of the first screw (13) is fixedly connected to the worm wheel (10), and the worm wheel (10) cooperates with the worm (12).

8. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 1 is characterized in that: The rear lifting structure (7) comprises a second motor (701), a second screw rod (702), a second slide groove (703) provided on the upper surface of the base (1), a second slider (704), a third mounting plate (705), a support seat (706), a support rod (707), a connecting rod (708), and a connecting plate (709); the second motor (701) and the third mounting plate (705) are fixed on the base (1); one end of the second screw rod (702) is connected to the output end of the second motor (701), and the other end is connected to the third mounting plate (705). side wall, the second slider (704) is slidably engaged with the inner end of the second slide groove (703), and is threadedly engaged with the second screw rod (702), the support seat (706) is fixed to the top of the second slider (704), the support rod (707) is rotatably connected to the inner end of the support seat (706), two connecting rods (708) are provided, one end of the connecting rod (708) is fixedly connected to one end of the support rod (707), and the other end is hinged to the connecting plate (709), and the connecting plate (709) is fixedly connected to the rear wall of the support plate (2).

9. The multi-point fixed clamping tool for machining double blades of a heavy-duty gas turbine according to claim 1 is characterized in that: Two limiting holes (15) are provided inside the support plate (2) near the center, and auxiliary limiting rods (16) are provided at the inner ends of the two limiting holes (15), and the bottom ends of the auxiliary limiting rods (16) are fixedly connected to the upper end surface of the base (1).

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