Hole milling clamp for air entraining disc of gas turbine

Abstract

The utility model discloses a hole milling clamp for an air entraining disc of a gas turbine. A circular groove is defined by the upper end of a supporting seat through supporting columns; the lower end face of the supporting base is parallel to the working table face of the machine tool index plate, after the center of the supporting base coincides with the center of the machine tool index plate, the supporting base is fixed to the machine tool index plate through the cushion block, the pressing plate, the stud b, the gasket b and the hexagon nut b, and then the air entraining disc is fixed into a circular groove in the upper end face of the supporting base through the stud a, the gasket a and the hexagon nut a. The device solves the problems of hole milling, clamping, positioning and indexing of the air entraining disc, ensures the quality of products, and meets the requirements of drawings.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a gas turbine air bleed disc milling hole clamp. Background Art

[0002] The air bleed plate is a part of the gas turbine project. The annular part is a machined part made of GH4169 forgings. The part has a complex shape and is difficult to process. The processing dimensions of the part are circumferentially uniformly distributed holes: 20-Ф15.3 ( Figure 1 ). The number of holes to be processed is large, the equal division requirement is high, and there are positioning requirements. During the machining process, due to the complex structure of the parts and the position to be processed is close to the lower end surface, clamping is difficult and it is difficult to meet the processing conditions. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a gas turbine air bleed plate milling fixture, and the specific technical solution is as follows:

[0004] A gas turbine bleed plate milling hole fixture, comprising a support seat, a cover plate, a stud a, a cushion block, a pressure plate and a stud b;

[0005] The lower end of the support seat is provided with a mounting edge extending outward along the circumferential direction;

[0006] The upper end of the support seat is provided with a support column extending outward along the circumferential direction, and the support column protrudes upward, and the support column forms a circular groove at the upper end of the support seat;

[0007] The support base is provided with a screw hole at the center for installing stud a;

[0008] The lower end surface of the support seat is arranged parallel to the working table surface of the machine tool indexing disc, and the center of the support seat coincides with the center of the machine tool indexing disc;

[0009] The mounting edge of the support seat is provided with a cushion block along the circumferential direction, a pressure plate is provided on the mounting edge and the cushion block, a stud b passes through the pressure plate, the support seat is fixed to the machine tool indexing disc, and the stud b is locked and fixed by a hexagonal nut;

[0010] Place the lower end surface of the air bleed plate in the circular groove of the support seat, set a cover plate on the upper end of the air bleed plate, pass the stud a through the cover plate and the air bleed plate to the screw hole set in the center of the support seat, and lock and fix the stud a with a hexagonal nut;

[0011] A gasket a is arranged between the cover plate and the hexagonal nut, and a gasket b is arranged between the pressure plate and the hexagonal nut.

[0012] The preferred embodiment of the gas turbine air bleed plate milling fixture is that the depth of the disc groove of the support seat is set according to the depth of the air bleed plate ring groove.

[0013] The preferred embodiment of the gas turbine air bleed plate milling fixture is that the diameter size of the support seat pillar is set according to the inner wall size of the air bleed plate annular groove, and the inner wall of the air bleed plate annular groove is clamped on the outer ring surface of the pillar.

[0014] An operating method of a gas turbine air bleed plate milling fixture: before processing the evenly distributed holes of the air bleed plate, first place the machine tool indexing disc on the milling machine platform, then make the installation edge of the lower end of the support seat parallel to the working table of the machine tool indexing disc, and after the center of the support seat coincides with the center of the machine tool indexing disc, use a cushion block, a pressure plate, a stud b, a gasket b, and a hexagonal nut b to fix it on the machine tool indexing disc, and then use a stud a, a gasket a, and a hexagonal nut a to fix the air bleed plate in the circular groove on the upper end face of the support seat. After all parts are firmly installed, you can start processing the holes 20-Ф15.3 of the air bleed plate. After processing each hole, rotate the machine tool indexing disc 18° to process the second hole. Perform the above steps in sequence to finally complete the processing of 20 holes of the part. After processing is completed, loosen the hexagonal nut a to remove the part.

[0015] Beneficial Effects

[0016] The air entrainment plate milling hole fixture designed by the utility model utilizes the lower end surface and the annular groove of the part to clamp and position the part, and utilizes the machine tool indexing disc to perform 20-hole indexing.

[0017] The fixture is simple, practical, safe, reliable, easy to load and unload, and can be used to process parts well, meeting the requirements of the drawings. The use of this fixture saves processing costs, improves production efficiency, and improves product quality. The application of this fixture solves the problem of positioning and indexing of the milling hole of the air bleed plate, ensuring the quality of the product and meeting the requirements of the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the air bleed plate design;

[0019] Figure 2 A schematic diagram of a gas turbine air bleed plate milling fixture and an air bleed plate installation structure;

[0020] Figure 3 This is a schematic diagram of the air bleed plate milling fixture processing.

[0021] In the figure: 1. support seat, 2. cover plate, 3. stud a, 4. spacer, 5. pressure plate, 6. stud b, 7. mounting edge, 8. support, 9. circular groove, 10. machine tool indexing disk, 11. hexagonal nut b, 12. hexagonal nut a, 13. air disc, 14. gasket a, 15. gasket b, 16. air disc ring groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-3 , a gas turbine bleed plate milling fixture, comprising a support seat 1, a cover plate 2, a stud a3, a cushion block 4, a pressure plate 5 and a stud b6;

[0024] The lower end of the support seat 1 is provided with a mounting edge 7 extending outwards along the circumferential direction;

[0025] The upper end of the support seat 1 is provided with a support column 8 extending outward along the circumferential direction, and the support column 8 protrudes upward, and the support column 8 forms a circular groove 9 at the upper end of the support seat 1;

[0026] The support base 1 has a screw hole at its center for mounting a stud a3;

[0027] The lower end surface of the support seat 1 is arranged parallel to the working table surface of the machine tool indexing disc 10, and the center of the support seat 1 coincides with the center of the machine tool indexing disc 10;

[0028] The mounting edge 7 of the support seat 1 is provided with a cushion block 4 along the circumferential direction, a pressure plate 5 is provided on the mounting edge 7 and the cushion block 4, a stud b6 passes through the pressure plate 5, the support seat 1 is fixed to the machine tool indexing disc 10, and the stud b6 is locked and fixed by a hexagonal nut b11;

[0029] Place the lower end surface of the air ducting plate 13 in the circular groove 9 of the support seat 1, set the cover plate 2 on the upper end of the air ducting plate 13, and pass the stud a3 through the cover plate 2 and the air ducting plate 13 to the screw hole set in the center of the support seat 1, and lock and fix the stud a3 with the hexagonal nut a12;

[0030] A gasket a14 is provided between the cover plate 2 and the hexagonal nut a12, and a gasket b15 is provided between the pressing plate 5 and the hexagonal nut b11.

[0031] The depth of the disc groove 9 of the support seat 1 is set according to the depth of the air ducting disc annular groove 16 .

[0032] The diameter of the support column 8 of the support seat 1 is set according to the inner wall size of the air ducting plate annular groove 16 , and the inner wall of the air ducting plate annular groove 16 is clamped on the outer annular surface of the support column 8 .

[0033] An operating method of a gas turbine air bleed plate milling fixture: before processing the uniformly distributed holes of the air bleed plate 13, first place the machine tool indexing disc 10 on the milling machine platform, then make the mounting edge 7 at the lower end of the support seat 1 parallel to the working table of the machine tool indexing disc 10, and after the center of the support seat 1 coincides with the center of the machine tool indexing disc 10, use the cushion block 4, the pressure plate 5, the stud b6, the gasket b15, and the hexagonal nut b11 to fix it on the machine tool indexing disc 10, and then use the stud a3, the gasket a14, and the hexagonal nut a12 to fix the air bleed plate 13 in the circular groove 9 on the upper end surface of the support seat 1. After all parts are firmly installed, the holes 20-Ф15.3 of the air bleed plate 13 can be processed. After each hole is processed, the machine tool indexing disc is rotated 18° to process the second hole. The above steps are performed in sequence to finally complete the processing of 20 holes of the part. After processing is completed, loosen the hexagonal nut a12 to remove the part.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas turbine bleed plate milling fixture, characterized in that: It includes a support seat, a cover plate, a stud a, a pad, a pressure plate and a stud b; The lower end of the support seat is provided with a mounting edge extending outward along the circumferential direction; The upper end of the support seat is provided with a support column extending outward along the circumferential direction, and the support column protrudes upward, and the support column forms a circular groove at the upper end of the support seat; The support base is provided with a screw hole at the center for installing stud a; The lower end surface of the support seat is arranged parallel to the working table surface of the machine tool indexing disc, and the center of the support seat coincides with the center of the machine tool indexing disc; The mounting edge of the support seat is provided with a cushion block along the circumferential direction, a pressure plate is provided on the mounting edge and the cushion block, a stud b passes through the pressure plate, the support seat is fixed to the machine tool indexing disc, and the stud b is locked and fixed by a hexagonal nut; Place the lower end surface of the air bleed plate in the circular groove of the support seat, set a cover plate on the upper end of the air bleed plate, pass the stud a through the cover plate and the air bleed plate to the screw hole set in the center of the support seat, and lock and fix the stud a with a hexagonal nut; A gasket a is arranged between the cover plate and the hexagonal nut, and a gasket b is arranged between the pressure plate and the hexagonal nut.

2. A gas turbine bleed plate milling fixture according to claim 1, characterized in that: The depth of the circular disc groove of the support seat is set according to the depth of the annular groove of the air ducting disc.

3. A gas turbine bleed plate milling fixture according to claim 1, characterized in that: The diameter size of the pillar of the support seat is set according to the inner wall size of the air inlet plate annular groove, and the inner wall of the air inlet plate annular groove is clamped on the outer annular surface of the pillar.

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