Integrated machining device for low-pressure turbine working blade and blade crown

Abstract

The utility model relates to a tool, in particular to a low-pressure turbine working blade and blade crown integrated machining device. According to the technical scheme, the low-pressure turbine working blade crown integrated machining device comprises a base, a support, a tenon tooth clamp and a blade body clamp, the support and the tenon tooth clamp are arranged on the base, the blade body clamp is arranged on the side of the upper portion of the support, and the tenon tooth clamp and the blade body clamp are arranged on the base. The tenon tooth clamp is used for positioning tenon teeth of the low-pressure turbine working blade, and the blade body clamp is used for positioning a blade body of the low-pressure turbine working blade. According to the low-pressure turbine working blade crown integrated machining device, machining of the blade crown top face, the blade crown exhaust side face and the blade crown air inlet side face can be completed through one-time clamping, the machining time is shortened, it is guaranteed that the sizes of blades are relatively consistent in the same state, and the machining quality stability of the blades is improved.

Description

Technical Field

[0001] The utility model relates to a tool, in particular to an integrated processing device for a blade crown of a low-pressure turbine working blade. Background Art

[0002] At present, the process steps of machining the blade crown of the working blade of the low-pressure turbine are divided into five steps: grinding the side of the blade crown at the inlet side, grinding the side of the blade crown at the exhaust side, grinding the blade crown toward the basin, grinding the blade crown toward the back, and grinding the crown top; the second step fixture uses the machining surface processed in the first step as the reference, the third step fixture uses the machining surface processed in the second step as the reference, the fourth step fixture uses the machining surface processed in the third step as the reference, and the fifth step fixture uses the machining surface processed in the third step as the reference. Four sets of fixtures are required to complete the machining of the entire blade crown. The clamping times of the blade are many and cumbersome, the number of fixtures to be designed and manufactured is large, the design and manufacturing cycle is long, and the manufacturing cost is high. The inconsistent positioning reference system of multiple sets of fixtures is prone to measurement errors, the manufacturing errors of multiple sets of fixtures are prone to system error accumulation, and multiple clamping is prone to clamping error accumulation, resulting in insufficient relative consistency of the blade dimensions in the same state, and there is a large instability in the processing quality. Utility Model Content

[0003] The utility model provides an integrated processing device for the blade crown of a low-pressure turbine working blade. The device can complete the processing of the blade crown top surface, the blade crown exhaust side surface, and the blade crown intake side surface through one clamping, thereby shortening the processing time, ensuring the relative consistency of various dimensions of the blade in the same state, and improving the processing quality stability of the blade.

[0004] The technical solution of the utility model is as follows:

[0005] A low-pressure turbine working blade crown integrated processing device comprises a base, a support, a tenon fixture and a blade body fixture, wherein the support and the tenon fixture are arranged on the base, the blade body fixture is arranged on the upper side of the support, the tenon fixture is used to position the tenon of the low-pressure turbine working blade, and the blade body fixture is used to position the blade body of the low-pressure turbine working blade.

[0006] Furthermore, in the low-pressure turbine blade crown integrated processing device, the tenon fixture includes a positioning block, a clamping block and a clamping screw, the positioning block is fixedly arranged on the base, and the clamping block is connected to the positioning block through the clamping screw.

[0007] Furthermore, in the low-pressure turbine blade crown integrated processing device, the upper ends of the positioning block and the clamping block are provided with contoured grooves that cooperate with the tenons of the low-pressure turbine blades.

[0008] Furthermore, the low-pressure turbine blade crown integrated processing device, the blade body fixture includes a support block, an L-shaped block, a tightening block 1, a tightening block 2, a tightening block 3, a support plate, a tightening screw, a spring 1, a spring 2, a positioning screw 1 and a positioning screw 2, the support block and the L-shaped block are fixedly arranged in parallel on the upper side of the support; a spring cavity 1 and a spring cavity 2 are arranged in parallel inside the support block; the spring 1 is placed in the spring cavity 1, and the tail end of the tightening block 1 extends into the port of the spring cavity 1 and is pressed Spring one, positioning screw one is screwed on the support block and its end head presses against the tail end of tightening block one; spring two is placed in spring cavity two, the tail end of tightening block two extends into the port of spring cavity two and compresses spring two, positioning screw two is screwed on the support block and its end head presses against the tail end of tightening block two; the L-shaped block is provided with a sliding cavity, the tail end of tightening block three extends into the sliding cavity; the support plate is fixedly arranged on the L-shaped block, the tightening screw is screwed on the support plate and its end head presses against the tail end of tightening block three.

[0009] Furthermore, in the low-pressure turbine blade crown integrated processing device, the front ends of the tightening block one and the tightening block two are conformed to the blade back of the low-pressure turbine blade, and the front end of the tightening block three is conformed to the blade basin of the low-pressure turbine blade.

[0010] The beneficial effects of the utility model are as follows: the low-pressure turbine working blade crown integrated processing device provided by the utility model can complete the processing of the blade crown top surface, the blade crown exhaust side surface, and the blade crown intake side surface through one clamping, thereby shortening the processing time, ensuring the relative consistency of the various dimensions of the blades in the same state, and improving the stability of the blade processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the integrated processing device for the blade crown of a low-pressure turbine working blade;

[0012] Figure 2 This is the front view of the integrated processing device for the low-pressure turbine blade crown;

[0013] Figure 3 Right view of the integrated processing device for the low-pressure turbine blade crown. DETAILED DESCRIPTION

[0014] like Figure 1-3 As shown, a low-pressure turbine working blade crown integrated processing device includes a base 1, a support 2, a tenon fixture and a blade body fixture, the support 2 and the tenon fixture are arranged on the base 1, the blade body fixture is arranged on the upper side of the support 2, the tenon fixture is used to position the tenon of the low-pressure turbine working blade 13, and the blade body fixture is used to position the blade body of the low-pressure turbine working blade 13.

[0015] The tenon fixture comprises a positioning block 3, a clamping block 5 and a clamping screw 4. The positioning block 3 is fixedly arranged on the base 1, and the clamping block 5 is connected to the positioning block 3 through the clamping screw 4. The upper ends of the positioning block 3 and the clamping block 5 are provided with a contoured groove that matches the tenon of the low-pressure turbine working blade 13.

[0016] The blade body fixture includes a support block 6, an L-shaped block 7, a tightening block 1 8, a tightening block 2 9, a tightening block 3 10, a support plate 11, a tightening screw 12, a spring 1, a spring 2, a positioning screw 14 and a positioning screw 2 15. The support block 6 and the L-shaped block 7 are fixedly arranged side by side on the upper side of the support 2; a spring cavity 1 and a spring cavity 2 are arranged side by side inside the support block 6; the spring 1 is placed in the spring cavity 1, the tail end of the tightening block 1 8 extends into the port of the spring cavity 1 and presses the spring 1, and the positioning screw 14 is screwed on The support block 6 is mounted on the support block 6 and its end is against the tail end of the tightening block 1 8; the spring 2 is placed in the spring cavity 2, the tail end of the tightening block 2 9 extends into the port of the spring cavity 2 and compresses the spring 2, the positioning screw 2 15 is screwed on the support block 6 and its end is against the tail end of the tightening block 2 9; the L-shaped block 7 is provided with a sliding cavity, the tail end of the tightening block 3 10 extends into the sliding cavity; the support plate 11 is fixedly arranged on the L-shaped block 7, the tightening screw 12 is screwed on the support plate 11 and its end is against the tail end of the tightening block 3 10. The front ends of the tightening blocks 1 8 and 2 9 are matched with the back of the low-pressure turbine working blade 13, and the front end of the tightening block 3 10 is matched with the blade basin of the low-pressure turbine working blade 13.

[0017] The use process is as follows: put the tenon of the low-pressure turbine working blade 13 between the positioning block 3 and the clamping block 5 of the tenon fixture, tighten the clamping screw 4 to position the tenon of the low-pressure turbine working blade 13; turn the tightening screw 12 to make the front end of the tightening block 3 10 against the blade basin of the low-pressure turbine working blade 13; loosen the positioning screw 14 and the positioning screw 2 15, and the spring 1 and the spring 2 make the front ends of the tightening block 1 8 and the tightening block 2 9 against the back of the low-pressure turbine working blade 13, tighten the positioning screw 14 and the positioning screw 2 15 to position the tightening block 1 8 and the tightening block 2 9; start processing.

Claims

1. A low-pressure turbine blade crown integrated processing device, characterized in that: It includes a base, a support, a tenon fixture and a blade fixture, wherein the support and the tenon fixture are arranged on the base, the blade fixture is arranged on the upper side of the support, the tenon fixture is used to position the tenons of the low-pressure turbine working blades, and the blade fixture is used to position the blade of the low-pressure turbine working blades.

2. The low-pressure turbine blade shroud integrated processing device according to claim 1, characterized in that: The tenon tooth fixture comprises a positioning block, a clamping block and a clamping screw. The positioning block is fixedly arranged on the base, and the clamping block is connected to the positioning block through the clamping screw.

3. The low-pressure turbine blade shroud integrated processing device according to claim 2, characterized in that: The upper ends of the positioning block and the pressing block are provided with contoured grooves which match with the tenons of the low-pressure turbine working blades.

4. The low-pressure turbine blade shroud integrated processing device according to claim 1, characterized in that: The blade body clamp comprises a support block, an L-shaped block, a tightening block 1, a tightening block 2, a tightening block 3, a support plate, a tightening screw, a spring 1, a spring 2, a positioning screw 1 and a positioning screw 2, the support block and the L-shaped block are fixedly arranged in parallel on the upper side of the support; a spring cavity 1 and a spring cavity 2 are arranged in parallel inside the support block; the spring 1 is placed in the spring cavity 1, the tail end of the tightening block 1 extends into the port of the spring cavity 1 and presses the spring 1, the positioning screw 1 is screwed on the support block and its end head presses against the tail end of the tightening block 1; the spring 2 is placed in the spring cavity 2, the tail end of the tightening block 2 extends into the port of the spring cavity 2 and presses the spring 2, the positioning screw 2 is screwed on the support block and its end head presses against the tail end of the tightening block 2; The L-shaped block is provided with a sliding cavity, and the tail end of the tightening block three extends into the sliding cavity; the support plate is fixedly arranged on the L-shaped block, and the tightening screw is screwed on the support plate and its end head presses against the tail end of the tightening block three.

5. The low-pressure turbine blade shroud integrated processing device according to claim 4, characterized in that: The front ends of the first and second tightening blocks are matched with the blade backs of the low-pressure turbine working blades, and the front end of the third tightening block is matched with the blade basin of the low-pressure turbine working blades.

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