CN220806909U

CN220806909U - Heavy-duty gas turbine rotor blade tenon tooth grinding tool

Info

Publication number: CN220806909U
Application number: CN202322711815.8U
Authority: CN
Inventors: 牛鑫磊; 史向阳; 林荣强; 冯泽林; 靳浩天
Original assignee: Jiangsu Yuanqing Power Technology Co ltd
Current assignee: Jiangsu Yuanqing Power Technology Co ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2024-04-19
Anticipated expiration: 2033-10-10

Abstract

The utility model relates to the technical field of machining of movable blades of gas turbines, in particular to a heavy-duty movable blade tenon tooth grinding tool of a gas turbine. The movable blade clamping device comprises a mounting bottom plate, a clamping seat is fixed on the mounting bottom plate, a movable blade clamping groove which is vertically penetrated is formed in one side of the clamping seat, a fourth positioning head, a fifth positioning head and a sixth positioning head are respectively fixed on the side wall of the movable blade clamping groove, the fourth positioning head, the fifth positioning head and the sixth positioning head are horizontally arranged, and the upper end face of the clamping seat faces one side of the movable blade clamping groove and is detachably connected with a second mounting block through a connecting piece. According to the movable blade body, the plurality of positioning heads are matched with the plurality of clamping blocks to realize multi-point compression, and the positions of the plurality of clamping blocks can be freely adjusted, so that the clamping degree of the movable blade body is adjusted, the clamping stability of the movable blade of the heavy-duty gas turbine is improved, and the grinding quality of the tenon teeth is ensured.

Description

Heavy-duty gas turbine rotor blade tenon tooth grinding tool

Technical Field

The utility model relates to the technical field of machining of movable blades of gas turbines, in particular to a heavy-duty movable blade tenon tooth grinding tool of a gas turbine.

Background

The heavy-duty gas turbine blade has a complex structure, the grinding precision of the tenon tooth is high, and the tenon tooth needs to be subjected to creep grinding. The stable clamping of the tenon tooth on the heavy gas turbine movable blade before the grinding is very important, and the precision of the grinding of the tenon tooth is directly affected.

In the prior art, if clamping is unstable in the machining process of the heavy-duty gas turbine movable blade, position deviation is very easy to occur in the machining process, so that the machining precision cannot meet the requirements. Therefore, a heavy-duty gas turbine movable blade tenon tooth grinding tool is needed, clamping of a turbine movable blade can be accurately and reliably achieved, and machining quality of turbine movable blade tenon tooth machining is guaranteed.

Disclosure of utility model

Aiming at the defects in the prior art, the application provides a heavy-duty gas turbine movable blade tenon tooth grinding tool, which clamps the movable blade in a multi-point adjustable positioning clamping mode, improves the clamping stability of the heavy-duty gas turbine movable blade, and ensures the grinding quality of the tenon tooth.

The technical scheme adopted by the utility model is as follows:

The heavy-duty gas turbine movable blade tenon tooth grinding tool comprises a mounting bottom plate, a clamping seat is fixed on the mounting bottom plate, a movable blade clamping groove which penetrates up and down is formed in one side of the clamping seat, a fourth positioning head, a fifth positioning head and a sixth positioning head are respectively fixed on the side wall of the movable blade clamping groove, the fourth positioning head, the fifth positioning head and the sixth positioning head are horizontally arranged, the upper end face of the clamping seat is detachably connected with a second mounting block through a connecting piece, a first positioning head, a second positioning head and a third positioning head are respectively fixed on the side face of the second mounting block, the first positioning head and the second positioning head are horizontally arranged, and the third positioning head is vertically arranged; an upper clamping plate and a lower clamping plate are arranged at the opening end of the side surface of the movable blade clamping groove in an up-down manner, a first mounting groove and a second mounting groove are arranged at the upper portion of the clamping seat in an up-down manner, one ends of the upper clamping plate and the lower clamping plate are detachably connected with the side surface of the clamping seat through bolts, the other ends of the upper clamping plate and the lower clamping plate are respectively clamped in the first mounting groove and the second mounting groove, pin shaft holes which vertically penetrate through the first mounting groove and the second mounting groove are formed in the clamping seat, pin shafts are arranged in the pin shaft holes, and the pin shafts sequentially penetrate through the upper clamping plate and the lower clamping plate in the first mounting groove and the second mounting groove, so that the upper clamping plate and the lower clamping plate are rotationally connected on the clamping seat; the upper clamping plate is provided with a first adjustable compression assembly and a second adjustable compression assembly, the first adjustable compression assembly and the second adjustable compression assembly face the movable blade clamping groove, the lower clamping plate is provided with a third adjustable compression assembly, and the third adjustable compression assembly faces the movable blade clamping groove.

Further, first adjustable hold-down assembly is including setting up the first guide way on upper mounting plate upper portion, set up first compact heap in the first guide way, first compact heap can slide along first guide way back and forth, first compact heap tail end sets up T shape spread groove, first clamp down the regulation pole through threaded connection on the first guide way lateral wall, first clamp down the regulation pole front end and set up T shape connector, first clamp down the T shape spread groove of adjusting the pole and connecting first compact heap through T shape connector, first guide way upper end sets up first apron, first apron passes through connecting piece detachable and connects upper mounting plate.

Further, the adjustable hold-down subassembly of second sets up the second guide way of upper mounting plate lower part including setting up, set up the second compact heap in the second guide way, the second compact heap can slide along second guide way back and forth, second compact heap tail end sets up T shape spread groove, through threaded connection second on the second guide way lateral wall and compresses tightly the regulation pole, second compresses tightly the regulation pole front end and sets up T shape connector, the second compresses tightly the T shape spread groove that the regulation pole passes through T shape connector connection second compact heap, second guide way upper end sets up the second apron, the second apron passes through connecting piece detachable and connects upper mounting plate.

Further, the adjustable hold-down assembly of third sets up the third guide way of third guide way on lower clamping plate including setting up, the third guide way is interior to set up the third compact heap, the third compact heap can slide along third guide way front and back, third compact heap tail end sets up T shape spread groove, through threaded connection third on the third guide way lateral wall to compress tightly and adjust the pole, third compresses tightly the pole front end and sets up T shape connector, third compresses tightly the T shape spread groove that adjusts the pole and passes through T shape connector connection third compact heap, third guide way upper end sets up the third apron, the third apron passes through connecting piece detachable and connects clamping plate down.

Further, the upper clamping plate upper end face is detachably connected with a third installation block through a bolt, two sliding grooves are formed in the front end of the third installation block, a first clamping block capable of sliding back and forth is arranged in each sliding groove, a T-shaped connecting groove is formed in the tail end of each first clamping block, two first adjusting screws are connected with the rear end of each third installation block through threads, T-shaped connectors are arranged at the front end of each first adjusting screw, and the first adjusting screws are connected with the T-shaped connecting grooves of the first clamping blocks through the T-shaped connectors.

Further, the first installation piece of connection through bolt detachable on the second installation piece, first installation piece front end sets up two spouts, sets up the second that can slide from beginning to end in the spout and presss from both sides tight piece, and the second presss from both sides tight piece tail end and sets up T shape spread groove, and two second adjusting screw of threaded connection are passed through to first installation piece rear end, and second adjusting screw front end sets up T shape connector, and the second adjusting screw passes through T shape connector and connects the T nature spread groove of the tight piece of second clamp.

Further, the clamping seat upper end face is provided with an auxiliary positioning block, the side face of the auxiliary positioning block can be in positioning contact with the side face of the movable blade tenon tooth part of the clamping, the auxiliary positioning block is detachably connected with the clamping seat (2) through an adjustable bolt, the auxiliary positioning block is provided with a long waist-shaped adjusting groove, and the adjustable bolt is positioned in the adjusting groove and can adjust the front and rear positions along the adjusting groove.

The beneficial effects of the utility model are as follows:

According to the movable blade body, the positioning heads are matched with the clamping blocks to realize multi-point compression, the positions of the clamping blocks can be freely adjusted, so that the clamping degree of the movable blade body is adjusted, the clamping stability of the movable blade of the heavy-duty gas turbine is improved, and the grinding quality of the tenon teeth is ensured; the front side surface and the rear side surface of the movable blade tenon tooth part are tightly pressed by the front and the rear matching of the second clamping block and the first clamping block, and the positions of the second clamping block and the first clamping block can be freely adjusted, so that the clamping degree of the movable blade tenon tooth part is adjusted.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is a perspective view of a chuck according to the present utility model.

Fig. 3 is a schematic view of the assembly of the first clamping block and the first adjusting screw of the present utility model.

Fig. 4 is a schematic structural view of an auxiliary positioning block according to the present utility model.

Fig. 5 is a view showing an assembly structure of the upper clamping plate of the present utility model.

Fig. 6 is a block diagram of a first adjustable compression assembly and a second adjustable compression assembly of the present utility model.

Fig. 7 is a block diagram of a third adjustable compression assembly of the present utility model.

Fig. 8 is a schematic structural diagram of fig. 7 with the third cover plate removed.

Wherein: 1. a mounting base plate; 2. clamping base; 3. a clamping plate is arranged on the upper part; 4. a clamping plate is arranged under the lower part; 5. a first mounting block; 6. a second mounting block; 7. a third mounting block; 8. a first clamping block; 9. a first adjusting screw; 10. a first positioning head; 11. a second positioning head; 12. a third positioning head; 13. a fourth positioning head; 14. a fifth positioning head; 15. a sixth positioning head; 16. an auxiliary positioning block; 17. an adjustable bolt; 18. an adjustment tank; 19. a first mounting groove; 20. a second mounting groove; 21. a first compression block; 22. a first hold-down adjustment lever; 23. a first cover plate; 24. a first guide groove; 25. a second compression block; 26. a second hold-down adjustment lever; 27. a second cover plate; 28. a third compaction block; 29. a third compression adjustment lever; 30. a third cover plate; 31. a third guide groove; 32. a second clamping block; 33. and a second adjusting screw.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 1 and 2, the heavy-duty gas turbine blade tenon tooth grinding tool comprises a mounting bottom plate 1, a clamping seat 2 is fixed on the mounting bottom plate 1, a blade clamping groove which is vertically penetrated is formed in one side of the clamping seat 2, a blade to be processed can be vertically placed in the blade clamping groove, a fourth positioning head 13, a fifth positioning head 14 and a sixth positioning head 15 are respectively fixed on the side wall of the blade clamping groove, the fourth positioning head 13, the fifth positioning head 14 and the sixth positioning head 15 are horizontally arranged, the positioning end of the fourth positioning head 13 can be in contact with the side surface of the clamped blade, and the positioning ends of the fifth positioning head 14 and the sixth positioning head 15 can be in contact with the cambered surface of the clamped blade.

As shown in fig. 1 and 2, the upper end surface of the clamping seat 2 faces one side of the movable blade clamping groove and is detachably connected with the second installation block 6 through a connecting piece, the side surface of the second installation block 6 is respectively fixed with the first positioning head 10, the second positioning head 11 and the third positioning head 12, the first positioning head 10 and the second positioning head 11 are horizontally arranged, the positioning end of the first positioning head 10 can be in contact with the side surface of the movable blade of the clamping, and the positioning end of the second positioning head 11 can be in contact with the cambered surface of the movable blade of the clamping. The third positioning head 12 is vertically arranged, and the positioning end of the third positioning head 12 can contact the lower end surface of the tooth part of the clamping moving blade tenon.

As shown in fig. 1 and 2, the open end of the side surface of the movable blade clamping groove is provided with an upper clamping plate 3 and a lower clamping plate 4 from top to bottom, the clamping seat 2 is provided with a first mounting groove 19 and a second mounting groove 20 from top to bottom, one ends of the upper clamping plate 3 and the lower clamping plate 4 are detachably connected with the side surface of the clamping seat 2 through bolts, and the other ends of the upper clamping plate 3 and the lower clamping plate 4 are respectively clamped in the first mounting groove 19 and the second mounting groove 20. The clamping seat 2 is provided with a pin shaft hole which vertically penetrates through the first mounting groove 19 and the second mounting groove 20, a pin shaft is arranged in the pin shaft hole, and the pin shaft sequentially penetrates through the upper clamping plate 3 and the lower clamping plate 4 in the first mounting groove 19 and the second mounting groove 20, so that the upper clamping plate 3 and the lower clamping plate 4 are rotationally connected on the clamping seat 2.

As shown in fig. 1 and 2, the upper clamping plate 3 is provided with a first adjustable compression component and a second adjustable compression component, the first adjustable compression component and the second adjustable compression component face the movable blade clamping groove, the first adjustable compression component and the second adjustable compression component can compress the movable blade which is in contact with the clamping, the lower clamping plate 4 is provided with a third adjustable compression component, the third adjustable compression component faces the movable blade clamping groove, the third adjustable compression component can compress the movable blade which is in contact with the clamping, and the first adjustable compression component, the second adjustable compression component and the third adjustable compression component are matched with a plurality of positioning heads to realize the clamping of the movable blade.

As shown in fig. 5 and 6, the first adjustable compression assembly comprises a first guide groove 24 arranged on the upper portion of the upper clamping plate 3, a first compression block 21 is arranged in the first guide groove 24, the first compression block 21 can slide back and forth along the first guide groove 24, a T-shaped connecting groove is arranged at the tail end of the first compression block 21, a first compression adjusting rod 22 is connected to the side wall of the first guide groove 24 through threads, a T-shaped connector is arranged at the front end of the first compression adjusting rod 22, the first compression adjusting rod 22 is connected with the T-shaped connecting groove of the first compression block 21 through the T-shaped connector, and the first compression adjusting rod 22 can be screwed to drive the first compression block 21 to slide back and forth along the first guide groove 24 so as to adjust the clamping force on the blade of the movable blade. The upper end of the first guide groove 24 is provided with a first cover plate 23, the first cover plate 23 is detachably connected with the upper clamping plate 3 through a connecting piece, and the first cover plate 23 can prevent the first compression block 21 from falling out of the first guide groove 24.

As shown in fig. 5 and 6, the second adjustable compression assembly comprises a second guide groove arranged at the lower part of the upper clamping plate 3, a second compression block 25 is arranged in the second guide groove, the second compression block 25 can slide back and forth along the second guide groove, a T-shaped connecting groove is arranged at the tail end of the second compression block 25, a second compression adjusting rod 26 is connected to the side wall of the second guide groove through threads, a T-shaped connector is arranged at the front end of the second compression adjusting rod 26, the second compression adjusting rod 26 is connected with the T-shaped connecting groove of the second compression block 25 through the T-shaped connector, and the second compression adjusting rod 26 can be screwed to drive the second compression block 25 to slide back and forth along the second guide groove, so that the clamping force on the blade of the movable blade is adjusted. The second guide way upper end sets up second apron 27, and second apron 27 passes through connecting piece detachable and connects upper mounting plate 3, and second apron 27 can stop second compact heap 25 and deviate from the second guide way.

As shown in fig. 7 and 8, the third adjustable compression assembly comprises a third guide groove 31 arranged on the lower clamping plate 4, a third compression block 28 is arranged in the third guide groove 31, the third compression block 28 can slide back and forth along the third guide groove 31, a T-shaped connecting groove is arranged at the tail end of the third compression block 28, a third compression adjusting rod 29 is connected to the side wall of the third guide groove 31 through threads, a T-shaped connector is arranged at the front end of the third compression adjusting rod 29, the third compression adjusting rod 29 is connected with the T-shaped connecting groove of the third compression block 28 through the T-shaped connector, and the third compression adjusting rod 29 can be screwed to drive the third compression block 28 to slide back and forth along the third guide groove so as to adjust the clamping force on the blade. The upper end of the third guide groove 31 is provided with a third cover plate 30, the third cover plate 30 is detachably connected with the lower clamping plate 4 through a connecting piece, and the third cover plate 30 can prevent the third compression block 28 from falling out of the third guide groove 31.

As shown in fig. 1 and 2, an auxiliary positioning block 16 is arranged on the upper end surface of the clamping seat 2, the side surface of the auxiliary positioning block 16 can be positioned and contacted with the side surface of the clamped moving blade tenon tooth part, and the auxiliary positioning block 16 plays an auxiliary positioning role on the clamped moving blade tenon tooth part. As shown in fig. 4, the auxiliary positioning block 16 is detachably connected with the clamping seat 2 through an adjustable bolt 17, a long waist-shaped adjusting groove 18 is formed in the auxiliary positioning block 16, and the adjustable bolt 17 is positioned in the adjusting groove 18 and can adjust the front and rear positions along the adjusting groove 18.

As shown in fig. 1 and 3, the upper end face of the upper clamping plate 3 is detachably connected with a third mounting block 7 through a bolt, two sliding grooves are formed in the front end of the third mounting block 7, a first clamping block 8 capable of sliding back and forth is arranged in each sliding groove, a T-shaped connecting groove is formed in the tail end of the first clamping block 8, the rear end of the third mounting block 7 is connected with two first adjusting screws 9 through threads, a T-shaped connector is arranged at the front end of the first adjusting screw 9, the first adjusting screw 9 is connected with the T-shaped connecting groove of the first clamping block 8 through the T-shaped connector, and the first adjusting screw 9 can be screwed to drive the first clamping block 8 to adjust the clamping degree of the side face of the tenon tooth portion of the moving blade.

As shown in fig. 3, the second mounting block 6 is detachably connected with the first mounting block 5 through a bolt, two sliding grooves are formed in the front end of the first mounting block 5, a second clamping block 32 capable of sliding back and forth is arranged in each sliding groove, a T-shaped connecting groove is formed in the tail end of the second clamping block 32, the rear end of the first mounting block 5 is connected with two second adjusting screws 33 through threads, a T-shaped connector is arranged at the front end of the second adjusting screw 33, the second adjusting screws 33 are connected with the T-shaped connecting grooves of the second clamping block 32 through the T-shaped connectors, and the second adjusting screws 33 can drive the second clamping block 32 to adjust the clamping degree of the side faces of the tenon tooth parts of the moving blades.

The working principle of the utility model is as follows: when the movable blade clamping is carried out, one ends of the upper clamping plate 3 and the lower clamping plate 4 are detached and rotate around the rotating shaft, so that the movable blade clamping groove is opened. The movable blade tenon tooth part is upwards arranged in the movable blade clamping groove, then the upper clamping plate 3 and the lower clamping plate 4 are rotated, and one ends of the upper clamping plate 3 and the lower clamping plate 4 are connected to the clamping seat 2 through bolts. At this time, the movable blade body is pressed from both sides the tight piece by a plurality of locating heads cooperation a plurality of clamp and realizes the multiple spot and compresses tightly, and a plurality of clamp can the free adjustment position to adjust the degree of clamp to the movable blade body. The front side and the rear side of the movable blade tenon tooth part are tightly pressed by the front and the rear matching of the two second clamping blocks 32 and the two first clamping blocks 8, and the positions of the two second clamping blocks 32 and the two first clamping blocks 8 can be freely adjusted, so that the clamping degree of the movable blade tenon tooth part is adjusted.

The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.

Claims

1. Heavy gas turbine movable vane tenon tooth grinding frock, including mounting plate (1), its characterized in that: a clamping seat (2) is fixed on the mounting base plate (1), a movable blade clamping groove which is vertically penetrated is formed in one side of the clamping seat (2), a fourth positioning head (13), a fifth positioning head (14) and a sixth positioning head (15) are respectively fixed on the side wall of the movable blade clamping groove, the fourth positioning head (13), the fifth positioning head (14) and the sixth positioning head (15) are horizontally arranged, the upper end surface of the clamping seat (2) faces one side of the movable blade clamping groove and is detachably connected with a second mounting block (6) through a connecting piece, a first positioning head (10), a second positioning head (11) and a third positioning head (12) are respectively fixed on the side surface of the second mounting block (6), and the first positioning head (10) and the second positioning head (11) are horizontally arranged and the third positioning head (12) is vertically arranged; an upper clamping plate (3) and a lower clamping plate (4) are arranged at the side opening end of the movable blade clamping groove respectively up and down, a first mounting groove (19) and a second mounting groove (20) are arranged at the upper part and the lower part of the clamping seat (2), one ends of the upper clamping plate (3) and the lower clamping plate (4) are detachably connected with the side surface of the clamping seat (2) through bolts, the other ends of the upper clamping plate (3) and the lower clamping plate (4) are respectively clamped in the first mounting groove (19) and the second mounting groove (20), pin shaft holes penetrating through the first mounting groove (19) and the second mounting groove (20) up and down are formed in the clamping seat (2), pin shafts are arranged in the pin shaft holes, and sequentially penetrate through the upper clamping plate (3) and the lower clamping plate (4) in the first mounting groove (19) and the second mounting groove (20), so that the upper clamping plate (3) and the lower clamping plate (4) are rotatably connected on the clamping seat (2); the upper clamping plate (3) is provided with a first adjustable compression assembly and a second adjustable compression assembly, the first adjustable compression assembly and the second adjustable compression assembly face the movable blade clamping groove, the lower clamping plate (4) is provided with a third adjustable compression assembly, and the third adjustable compression assembly faces the movable blade clamping groove.

2. The heavy duty gas turbine rotor blade tenon tooth grinding tool of claim 1, wherein: the adjustable clamp assembly comprises a first guide groove (24) arranged on the upper portion of the upper clamping plate (3), a first clamp block (21) is arranged in the first guide groove (24), the first clamp block (21) can slide back and forth along the first guide groove (24), the tail end of the first clamp block (21) is provided with a T-shaped connecting groove, the side wall of the first guide groove (24) is connected with a first clamp adjusting rod (22) through threads, the front end of the first clamp adjusting rod (22) is provided with a T-shaped connector, the first clamp adjusting rod (22) is connected with the T-shaped connecting groove of the first clamp block (21) through the T-shaped connector, the upper end of the first guide groove (24) is provided with a first cover plate (23), and the first cover plate (23) is detachably connected with the upper clamping plate (3) through a connecting piece.

3. The heavy duty gas turbine rotor blade tenon tooth grinding tool of claim 2, wherein: the adjustable hold-down subassembly of second sets up second guide way at last clamping plate (3) lower part including setting up second guide way, set up second compact heap (25) in the second guide way, second compact heap (25) can slide along second guide way front and back, second compact heap (25) tail end sets up T shape spread groove, through threaded connection second hold-down regulation pole (26) on the second guide way lateral wall, second hold-down regulation pole (26) front end sets up T shape connector, second hold-down regulation pole (26) are through the T shape spread groove of T shape connector connection second compact heap (25), second guide way upper end sets up second apron (27), second apron (27) are through connecting piece detachable connection last clamping plate (3).

4. A heavy duty gas turbine rotor blade tenon tooth grinding tool as claimed in claim 3, wherein: the adjustable hold-down assembly of third sets up third compact heap (28) including setting up third guide way (31) on lower clamping plate (4) in third guide way (31), third compact heap (28) can slide along third guide way (31) front and back, third compact heap (28) tail end sets up T shape spread groove, through threaded connection third clamp down regulation pole (29) on third guide way (31) lateral wall, third clamp down regulation pole (29) front end sets up T shape connector, third clamp down regulation pole (29) are through T shape connector connection third compact heap (28) T shape spread groove, third guide way (31) upper end sets up third apron (30), third apron (30) are through connecting piece detachable connection lower clamping plate (4).

5. The heavy duty gas turbine rotor blade tenon tooth grinding tool of claim 4, wherein: go up clamping board (3) up end and pass through bolt detachable and connect third installation piece (7), third installation piece (7) front end sets up two spouts, set up in the spout and press from both sides tight piece (8) of gliding first, the tail end of first tight piece (8) sets up T shape spread groove, two first adjusting screw (9) of threaded connection are passed through to third installation piece (7) rear end, first adjusting screw (9) front end sets up T shape connector, first adjusting screw (9) are connected the T shape spread groove of first tight piece (8) through T shape connector.

6. The heavy duty gas turbine rotor blade tenon tooth grinding tool of claim 5, wherein: the first installation piece (5) of bolt detachable connection is gone up in second installation piece (6), first installation piece (5) front end sets up two spouts, set up in the spout and press from both sides tight piece (32) of gliding second around, the second presss from both sides tight piece (32) tail end and sets up T shape spread groove, two second adjusting screw (33) of threaded connection are passed through to first installation piece (5) rear end, second adjusting screw (33) front end sets up T shape connector, second adjusting screw (33) are through T shape connector connection second clamp piece (32) T nature spread groove.

7. The heavy duty gas turbine rotor blade tenon tooth grinding tool of claim 6, wherein: the clamping seat (2) up end sets up auxiliary positioning block (16), and auxiliary positioning block (16) side can the movable blade tenon tooth portion side of locating contact clamping, and auxiliary positioning block (16) are through adjustable bolt (17) detachable connection clamping seat (2), set up rectangular kidney-shaped adjustment tank (18) on auxiliary positioning block (16), and adjustable bolt (17) are arranged in adjustment tank (18) and can be along adjustment tank (18) regulation front and back position.