Special tool for milling hexagon of elbow joint

Abstract

The utility model relates to a special hexagonal milling tool for elbow joints, which comprises a fixed seat and is technically characterized in that a horizontal threaded hole is arranged in the middle of the fixed seat, a radial notch communicated with the horizontal threaded hole is arranged on one side of the horizontal threaded hole, a check block with the upper edge higher than the lower edge of the horizontal threaded hole is fixed on the lower portion of the back face of the fixed seat, and an angular seat is arranged on the lower portion of the front face of the fixed seat. The angular seat is a right-angle support, a horizontal plate section of the right-angle support is connected with the fixing seat, an angular positioning pin is arranged on the upper portion of a vertical plate section of the right-angle support, the center line of the angular positioning pin and the center line of the horizontal threaded hole are equal in height, and the included angle between the two is equal to the included angle at the inflection point of the elbow joint. The device solves the problem that hexagon milling is not facilitated due to the special shape of the elbow joint, the clamping and positioning difficulty is greatly reduced, the machining precision is guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing parts of aviation engines, in particular to a special tool for milling hexagonal elbow joints. Background Art

[0002] The elbow joint is a very important part in the accessories of aircraft engines. In order to facilitate installation, a hexagonal structure is usually set on the outside of the interface of the elbow joint. However, the angle requirements of the hexagonal structure are strict, and the shape and position tolerance requirements are strict, so the processing is difficult. The hexagonal milling process is the key process that affects the size and angle of the finished product of the hexagonal structure during the machining of the elbow joint. However, there are the following problems: Due to the special shape of the elbow joint, it is more troublesome to clamp and position it before the hexagonal milling process, and the processing accuracy is not easy to guarantee, which also affects the production efficiency. Utility Model Content

[0003] The utility model aims to provide a special tooling for hexagonal milling of elbow joints with reasonable structure and reliable use, so as to solve the problem that the elbow joints are not conducive to hexagonal milling due to their special shapes, greatly reduce the difficulty of clamping and positioning, ensure processing accuracy and improve production efficiency.

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

[0005] A special tooling for milling hexagonal elbow joints includes a fixed seat, and its technical highlights are: a horizontal threaded hole is provided in the middle of the fixed seat, a radial notch connected to the horizontal threaded hole is provided on one side of the horizontal threaded hole, a block whose upper edge is higher than the lower edge of the horizontal threaded hole is fixed to the lower back of the fixed seat, an angular seat is provided at the lower front of the fixed seat, the angular seat is a right-angle support, the horizontal plate section of the right-angle support is connected to the fixed seat, an angular positioning pin is provided on the upper part of the vertical plate section of the right-angle support, the center line of the angular positioning pin is at the same height as the center line of the horizontal threaded hole, and the angle between the two is equal to the angle at the inflection point of the elbow joint.

[0006] In the above-mentioned special tooling for milling hexagonal elbow joints, the included angle between the center line of the angular locating pin and the center line of the horizontal threaded hole is 30°-40°.

[0007] The above-mentioned special tooling for milling hexagonal elbow joints has a limiting ring in the middle of the angular locating pin, a reducing section for plugging into the interface of the elbow joint at the front end of the angular locating pin, an operating hole at the rear end of the angular locating pin, and a through hole corresponding to the angular locating pin at the upper part of the vertical plate section of the right-angle support, and the limiting ring is attached to the side of the vertical plate section facing away from the fixed seat.

[0008] In the above-mentioned special tooling for milling hexagons of elbow joints, diamond-shaped positioning pins and cylindrical positioning pins are arranged between the horizontal plate section of the right-angle support and the fixed seat to enhance the positioning accuracy.

[0009] In the above-mentioned special tooling for milling hexagonal elbow joints, the stopper is connected and fixed to the fixing seat by means of a hexagon socket cylindrical head screw.

[0010] In the above-mentioned special tooling for milling hexagonal elbow joints, the lower surfaces of the fixing seat, the right-angle support and the stopper are located in the same plane.

[0011] The beneficial effects of the utility model are:

[0012] First, use the horizontal threaded hole of the fixed seat to connect with one end of the elbow joint, and use the block to limit the position, and then use the angular positioning pin to connect with the other end of the elbow joint, so that the elbow joint is parallel to the horizontal plane, ensuring the position accuracy of the elbow joint before hexagonal milling. The problem that the elbow joint is not conducive to hexagonal milling due to its special shape is solved, the difficulty of clamping and positioning is greatly reduced, and the high efficiency and stability of hexagonal milling of the elbow joint are achieved, thereby ensuring the product size accuracy, ensuring the consistency of the product, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view taken along the line AA of the present utility model;

[0015] Figure 3 It is a BB section view of the utility model;

[0016] Figure 4 It is a CC sectional view of the utility model;

[0017] Figure 5 It is a structural diagram of an elbow joint.

[0018] In the figure: 1. fixing seat, 101. horizontal threaded hole, 102. radial notch, 2. angular seat, 3. angular locating pin, 301. limiting ring, 302. operating hole, 303. reduced diameter section, 4. elbow joint, 5. stopper, 6. hexagon socket head screw, 7. cylindrical locating pin, 8. diamond locating pin. DETAILED DESCRIPTION

[0019] The utility model is described in detail according to the accompanying drawings of the specification.

[0020] like Figure 1 to Figure 4As shown, the special tooling for milling hexagonal elbow joints includes a fixing seat 1, a horizontal threaded hole 101 is provided in the middle of the fixing seat 1, and a radial notch 102 connected to the horizontal threaded hole 101 is provided on one side thereof. A stopper 5 whose upper edge is higher than the lower edge of the horizontal threaded hole is fixed to the lower back of the fixing seat 1, and an angular seat 2 is provided at the lower front of the fixing seat 1. The angular seat 2 is a right-angle support, and the horizontal plate section of the right-angle support is connected to the fixing seat 1, and an angular positioning pin 3 is provided on the upper part of the vertical plate section of the right-angle support. The center line of the angular positioning pin 3 is at the same height as the center line of the horizontal threaded hole 101, and the angle between the two is equal to the angle at the inflection point of the elbow joint 4.

[0021] In this embodiment, the angle between the center line of the angular locating pin 3 and the center line of the horizontal threaded hole 101 is 30°-40 degrees. A limiting ring 301 is provided in the middle of the angular locating pin 3, a reduced diameter section 303 which is plugged into the interface of the elbow joint 4 is provided at the front end of the angular locating pin 3, an operating hole 302 is provided at the rear end of the angular locating pin 3, and a through hole corresponding to the angular locating pin 3 is provided at the upper part of the vertical plate section of the right-angle support, and the limiting ring 301 is attached to the side of the vertical plate section facing away from the fixed seat 1. Diamond locating pins 8 and cylindrical locating pins 7 are provided between the horizontal plate section of the right-angle support and the fixed seat 1 to enhance the positioning accuracy. The stopper 5 is connected and fixed to the fixed seat 1 by a hexagon socket head screw 6. The lower surfaces of the fixed seat 1, the right-angle support and the stopper 5 are located in the same plane.

[0022] Working process:

[0023] 1. Screw one end of the elbow joint 4 to be processed into the horizontal threaded hole 101 of the fixing seat 1, and then use the angular seat 2 and the angular positioning pin 3 to perform positioning operation. After adjustment, the reduced diameter section 303 at the front end of the angular positioning pin 3 is plugged into the other interface of the elbow joint 4. At this time, the elbow joint 4 is parallel to the horizontal plane to achieve angular alignment.

[0024] 2. Remove the angular seat 2, angular locating pin 3, diamond locating pin 8 and cylindrical locating pin 7 to carry out the milling operation.

[0025] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A special tool for milling hexagonal elbow joints, including a fixing seat, characterized in that: A horizontal threaded hole is provided in the middle of the fixing seat, and a radial notch connected to the horizontal threaded hole is provided on one side of the horizontal threaded hole. A block whose upper edge is higher than the lower edge of the horizontal threaded hole is fixed to the lower back of the fixing seat, and an angular seat is provided at the lower front of the fixing seat. The angular seat is a right-angle support, and the horizontal plate section of the right-angle support is connected to the fixing seat. An angular positioning pin is provided on the upper part of the vertical plate section of the right-angle support. The center line of the angular positioning pin is at the same height as the center line of the horizontal threaded hole, and the angle between the two is equal to the angle at the inflection point of the elbow joint.

2. The special tooling for hexagonal milling of elbow joints according to claim 1 is characterized in that: The included angle between the center line of the angular positioning pin and the center line of the horizontal threaded hole is 30°-40°.

3. The special tooling for hexagonal milling of elbow joints according to claim 1 is characterized in that: A limiting ring is provided in the middle of the angular locating pin, a reduced diameter section is provided at the front end of the angular locating pin for plugging into the interface of the elbow joint, an operating hole is provided at the rear end of the angular locating pin, a through hole corresponding to the angular locating pin is provided at the upper part of the vertical plate section of the right-angle support, and the limiting ring is attached to the side of the vertical plate section facing away from the fixed seat.

4. The special tooling for hexagonal milling of elbow joints according to claim 1 is characterized in that: A diamond-shaped positioning pin and a cylindrical positioning pin are arranged between the horizontal plate section of the right-angle support and the fixing seat.

5. The special tooling for hexagonal milling of elbow joints according to claim 1 is characterized in that: The stopper is connected and fixed to the fixing seat by means of a hexagon socket head screw.

6. The special tooling for hexagonal milling of elbow joints according to claim 1 is characterized in that: The lower surfaces of the fixing seat, the right-angle support and the stopper are located in the same plane.

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