Thin-wall part positioning tool for machining gas turbine high-temperature alloy diffuser

Abstract

The utility model belongs to the technical field of machining tools, and particularly provides a thin-wall part positioning tool for machining a high-temperature alloy diffuser of a gas turbine, which comprises a base, a table top, a gear set and a clamping jaw, the table top is buckled above the base, and the gear set is assembled between the base and the table top; a plurality of clamping jaw rotating shafts are arranged on the surface of the table top in a central symmetry mode, the clamping jaws are rotationally installed on the clamping jaw rotating shafts in a one-to-one mode, and torsional springs are arranged at the connecting positions of the clamping jaws and the clamping jaw rotating shafts. According to the scheme, the J-shaped clamping jaws with the arc-shaped contact surfaces are adopted, and the surface of a workpiece cannot be damaged in the clamping process; the clamping jaws are driven by the gear set, a worker can guarantee synchronous action of the multiple clamping jaws by controlling the gear set, the operation process of clamping work is simplified, the concentricity of a clamped workpiece and a tool table top is improved, and the machining precision can be improved. The clamping jaws are divided into an inner group and an outer group and clamp the inner side and the outer side of a workpiece respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining tooling, and in particular provides a thin-walled part positioning tooling used for machining a high-temperature alloy diffuser of a combustion engine. Background Art

[0002] The design and application of thin-walled parts positioning tooling is an important part of the field of precision machining. The main purpose of this type of tooling is to ensure that thin-walled parts can be stably and accurately positioned during the machining process, thereby improving machining accuracy and efficiency. Thin-walled parts are prone to deformation during machining due to their structural characteristics, so the requirements for positioning tooling are relatively high.

[0003] The diffuser is an important part of the gas turbine, used to decelerate and restore the pressure of the high-temperature and high-pressure gas generated in the combustion chamber, thereby improving the efficiency and performance of the gas turbine. It is usually made of high-temperature resistant alloy materials and belongs to the category of thin-walled parts.

[0004] The thin-walled parts positioning fixtures in use on the market mainly include multi-point positioning fixtures, elastic fixtures, vacuum adsorption fixtures, and magnetic adsorption fixtures. Considering that the diffuser is an irregular cylindrical shape, among the above fixtures, only the multi-point positioning fixture has a high adaptability. The conventional multi-point positioning fixture consists of a base and a positioning block. Multiple positioning blocks are assembled on the base through screws, and the positioning blocks abut against the outer wall of the workpiece to achieve multi-point clamping. This clamping scheme has the advantages of adjustable clamping force, simple structure, and low installation cost. However, since the positioning blocks are generally strip-shaped, and each positioning block requires the staff to adjust the positioning one by one, there are problems with uneven abutment angles and abutment forces. Utility Model Content

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a thin-walled parts positioning tool for processing a high-temperature alloy diffuser of a combustion engine, comprising a base, a table, a gear set and a clamping claw, the table is buckled on the top of the base, and the gear set is assembled between the base and the table;

[0006] A plurality of clamping claw rotating shafts are symmetrically arranged on the surface of the table, and a plurality of clamping claws are rotatably mounted on the clamping claw rotating shafts one by one, and a torsion spring is arranged at the connection between the clamping claw and the clamping claw rotating shaft;

[0007] The clamping jaws are in a "J" shape, and the multiple clamping jaws are divided into an inner ring clamping jaw group and an outer ring clamping jaw group, and the gear group drives the inner ring clamping jaw group and the outer ring clamping jaw group to move respectively.

[0008] Further, the gear set includes a gear ring, a driven gear and a driving gear, the gear ring and the driving gear are coaxially mounted in the base, a plurality of driven gears are centrally symmetrically distributed between the gear ring and the driving gear, the plurality of driven gears are divided into an inner ring group and an outer ring group, the inner ring groups are all meshed with the driving gear, the outer ring groups are all meshed with the gear ring, and the upper surfaces of the driven gears are all equipped with shifting rods;

[0009] The surface of the table top is centrally symmetrically provided with a plurality of arc-shaped guide holes, the positions of the guide holes correspond one-to-one with the claw shafts, and the shifting rods pass through the guide holes one-to-one. When the driven gear rotates, the corresponding shifting rods follow and slide in the corresponding guide holes.

[0010] Furthermore, a main shaft is coaxially assembled in the middle of the driving gear, and a keyway is arranged on the upper end surface of the main shaft.

[0011] Furthermore, a plurality of guide wheels are arranged on the inner side wall of the base, the guide wheels are fitted with the outer wall of the gear ring, a strip hole is opened on the side wall of the base, a handle is fixedly installed on the outer wall of the gear ring, and the handle extends to the outside of the base through the strip hole.

[0012] Furthermore, a plurality of baffles are arranged on the bottom surface of the inner cavity of the base, and the baffles are evenly distributed between the inner ring group and the outer ring group.

[0013] Furthermore, a plurality of slots are arranged on the top end surface of the side wall of the base, and flanges corresponding to the positions of the slots are arranged on the side wall of the table top.

[0014] Furthermore, the upper surfaces of the gear ring and the driving gear are both annularly provided with ratchet grooves, and the surface of the table top is screwed with two locating pins, the positions of the two locating pins respectively correspond to the positions of the tooth surfaces of the two ratchet grooves, and the lower end of the locating pin is equipped with a tooth pin through an elastic connecting piece, and the tooth pin is clamped in the ratchet groove.

[0015] Furthermore, a rubber pad is embedded on the convex surface of the arc-shaped section of the clamping jaw.

[0016] The beneficial effects of using the utility model are:

[0017] This solution uses a "J"-shaped clamp with an arc-shaped contact surface, which will not cause damage to the workpiece surface during the clamping process;

[0018] The clamping jaws are driven by a gear set. The staff can ensure the synchronous movement of multiple clamping jaws by controlling the gear set, which not only simplifies the operation process of clamping work, but also improves the concentricity of the workpiece and the tooling table after clamping, which helps to improve the processing accuracy.

[0019] The clamping jaws are divided into two groups, inner and outer, which clamp the workpiece from the inner and outer sides respectively, dispersing the points where the clamping force is applied and increasing the positioning points, further improving the clamping stability without damaging the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the utility model when clamping a workpiece;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the base of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the gear set of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the table top of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the clamping jaws of the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the positioning pin of the utility model;

[0027] Reference numerals include:

[0028] 1. Base; 101. Strip hole; 102. Guide wheel; 103. Gear shaft; 104. Baffle; 105. Card slot;

[0029] 2. table top; 201. guide hole; 202. claw shaft;

[0030] 3. Gear set; 301. Ring gear; 302. Driven gear; 303. Driving gear; 304. Handle; 305. Lever; 306. Main shaft; 307. Ratchet groove;

[0031] 4. Clamping jaws; 401. Rubber pad;

[0032] 5. Positioning pin; 501. Tooth pin;

[0033] 6. Workpiece. DETAILED DESCRIPTION

[0034] The utility model is described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1-Figure 7 , a thin-walled parts positioning tool for processing a high-temperature alloy diffuser of a gas turbine, comprising a base 1, a table 2, a gear set 3 and a clamp 4, the table 2 is buckled on the top of the base 1, and the gear set 3 is assembled between the base 1 and the table 2;

[0036] A plurality of claw shafts 202 are symmetrically arranged on the surface of the table 2, and a plurality of clamping jaws 4 are rotatably mounted on the claw shafts 202 one by one, and a torsion spring is arranged at the connection between the clamping jaws 4 and the claw shafts 202;

[0037] The clamping jaws 4 are in a "J" shape, and the multiple clamping jaws 4 are divided into an inner ring clamping jaw group and an outer ring clamping jaw group. The gear group 3 drives the inner ring clamping jaw group and the outer ring clamping jaw group to move respectively.

[0038] The staff drives the clamping jaws 4 to open outward or gather inward through the gear set 3;

[0039] When the workpiece 6 needs to be clamped, first ensure that the inner ring clamping jaw group is in a gathered state and the outer ring clamping jaw group is in an open state, and place the workpiece 6 on the table 2 so that the lower edge of the workpiece 6 is located between the inner ring clamping jaw group and the outer ring clamping jaw group;

[0040] The staff then controls the inner ring clamping jaw group to open outwards and the outer ring clamping jaw group to gather inwards through the gear group 3, and finally achieves clamping.

[0041] The gear set 3 includes a ring gear 301, a driven gear 302 and a driving gear 303. The ring gear 301 and the driving gear 303 are coaxially mounted in the base 1. A plurality of driven gears 302 are centrally symmetrically distributed between the ring gear 301 and the driving gear 303. The plurality of driven gears 302 are divided into an inner ring group and an outer ring group. The inner ring groups are all meshed with the driving gear 303, and the outer ring groups are all meshed with the ring gear 301. The upper surfaces of the driven gears 302 are all equipped with shifting rods 305.

[0042] A plurality of arc-shaped guide holes 201 are symmetrically provided on the surface of the table top 2. The positions of the guide holes 201 correspond one-to-one to the claw shafts 202. The levers 305 pass through the guide holes 201 one-to-one. When the driven gear 302 rotates, the corresponding levers 305 follow and slide in the corresponding guide holes 201.

[0043] Preferably, a bearing is sleeved on the top of the lever 305 .

[0044] Specifically, the lever 305 abuts against the concave surface of the arc-shaped section of the clamping jaw 4 .

[0045] A main shaft 306 is coaxially mounted in the middle of the driving gear 303 . A keyway is provided on the upper end surface of the main shaft 306 . The keyway is used to connect to an external crank or hand wheel or other rotation input tool.

[0046] A plurality of guide wheels 102 are disposed on the inner wall of the base 1 , and the guide wheels 102 fit the outer wall of the gear ring 301 .

[0047] A strip-shaped hole 101 is formed on the side wall of the base 1 , and a handle 304 is fixedly mounted on the outer wall of the gear ring 301 . The handle 304 passes through the strip-shaped hole 101 and extends to the outside of the base 1 .

[0048] A plurality of baffles 104 are arranged on the bottom surface of the inner cavity of the base 1 , and the baffles 104 are evenly distributed between the inner ring group and the outer ring group.

[0049] A plurality of slots 105 are arranged on the top end surface of the side wall of the base 1 , and a flange corresponding to the position of the slots 105 is arranged on the side wall of the table top 2 .

[0050] The upper surfaces of the gear ring 301 and the driving gear 303 are both provided with a ratchet groove 307 in an annular manner. Two positioning pins 5 are screwed on the surface of the table top 2. The positions of the two positioning pins 5 correspond to the positions of the tooth surfaces of the two ratchet grooves 307 respectively. The lower end of the positioning pin 5 is equipped with a tooth pin 501 through an elastic connecting piece, and the tooth pin 501 is clamped in the ratchet groove 307.

[0051] A rubber pad 401 is embedded on the convex surface of the arc-shaped section of the clamping jaw 4.

[0052] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A thin-walled parts positioning tool for processing high-temperature alloy diffusers of combustion engines, characterized in that: It includes a base, a table, a gear set and a clamping claw, the table is buckled on the top of the base, and the gear set is assembled between the base and the table; A plurality of clamping claw rotating shafts are symmetrically arranged on the surface of the table, and a plurality of clamping claws are rotatably mounted on the clamping claw rotating shafts one by one, and a torsion spring is arranged at the connection between the clamping claw and the clamping claw rotating shaft; The clamping jaws are in a "J" shape, and the multiple clamping jaws are divided into an inner ring clamping jaw group and an outer ring clamping jaw group, and the gear group drives the inner ring clamping jaw group and the outer ring clamping jaw group to move respectively.

2. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 1, characterized in that: The gear set includes a gear ring, a driven gear and a driving gear. The gear ring and the driving gear are coaxially mounted in the base. A plurality of driven gears are centrally symmetrically distributed between the gear ring and the driving gear. The plurality of driven gears are divided into an inner ring group and an outer ring group. The inner ring groups are all meshed with the driving gear, and the outer ring groups are all meshed with the gear ring. A shifting lever is mounted on the upper surface of each driven gear. The surface of the table top is centrally symmetrically provided with a plurality of arc-shaped guide holes, the positions of the guide holes correspond one-to-one with the claw shafts, and the shifting rods pass through the guide holes one-to-one. When the driven gear rotates, the corresponding shifting rods follow and slide in the corresponding guide holes.

3. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 2, characterized in that: A main shaft is coaxially assembled in the middle of the driving gear, and a keyway is arranged on the upper end surface of the main shaft.

4. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 1, characterized in that: A plurality of guide wheels are arranged on the inner side wall of the base, the guide wheels are fitted with the outer wall of the gear ring, a strip hole is opened on the side wall of the base, a handle is fixedly installed on the outer wall of the gear ring, and the handle extends to the outside of the base through the strip hole.

5. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 1, characterized in that: A plurality of baffles are arranged on the bottom surface of the inner cavity of the base, and the baffles are evenly distributed between the inner ring group and the outer ring group.

6. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 1, characterized in that: A plurality of slots are arranged on the top end surface of the side wall of the base, and flanges corresponding to the positions of the slots are arranged on the side wall of the table top.

7. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 2, characterized in that: The upper surfaces of the gear ring and the driving gear are both annularly provided with ratchet grooves, and the surface of the table is screwed with two locating pins, the positions of the two locating pins respectively correspond to the positions of the tooth surfaces of the two ratchet grooves, and the lower end of the locating pin is equipped with a tooth pin through an elastic connecting piece, and the tooth pin is clamped in the ratchet groove.

8. A thin-walled parts positioning tool for machining a high-temperature alloy diffuser of a combustion engine according to claim 1, characterized in that: A rubber pad is embedded on the convex surface of the arc-shaped section of the clamping jaw.

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