An arc fusion brazing protection device for an aviation generator brush

Abstract

The present invention discloses an arc fusion brazing protection device for an aviation generator brush, belonging to the technical field of aviation equipment manufacturing. The device includes an air vent pipe, a left protective cover, a right protective cover, and fastening screws. The present invention fixes and protects the aviation generator brush, achieving the effect of improving the protection effect and welding quality of arc fusion brazing; the device of the present invention has a simple structure and is convenient to install, and can avoid oxidation of the connection joint and the copper wire connected thereto, so as to meet the manufacturing technical requirements of the aviation generator brush and improve the welding quality of arc fusion brazing.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation equipment manufacturing, and relates to an arc fusion brazing protection device for an aviation generator brush, which can ensure the protection effect and welding quality of the arc fusion brazing connection joint of the aviation generator brush and the copper wire connected thereto during the manufacturing process. Background Art

[0002] The brush of an aviation generator mainly consists of a connection joint, a copper wire, and a magnet. The connection joint mainly serves to connect the copper wire and an external power socket. The manufacturing process of the connection joint is as follows: First step, insert the copper wire into the copper tube; Second step, press the copper tube filled with the copper wire into a sheet shape by a press and ensure that the copper tube does not crack and meets the fixed dimensions of the drawing; Third step, complete the cover welding at one end of the sheet-shaped copper tube by arc fusion brazing to achieve the effect that the copper wire inside the copper tube is not exposed.

[0003] Arc fusion brazing is a welding method that relies on the heat of a tungsten electrode arc to melt the filler metal to achieve brazing. It is relatively common in the field of aviation equipment manufacturing to perform cover welding on the connection joint of the aviation generator brush through the process of arc fusion brazing. Since both the copper tube and the copper wire that make up the connection joint of the brush have very strong thermal conductivity, during the fusion brazing process of the connection joint of the aviation generator brush, the welding heat will quickly transfer to the position of the connection joint of the brush and the copper wire connected thereto. This position is extremely likely to chemically react with the surrounding air, resulting in severe oxidation. The color of the copper wire and the copper tube will change from bright purplish red to light yellow. At the same time, the flexibility and strength of the copper wire will be greatly reduced, leading to a poor reliability of the brush during use.

[0004] Currently, in the field of aviation equipment manufacturing, there is no device that can ensure the protection effect and welding quality of the connection joint of the aviation generator brush and the copper wire connected thereto during the arc fusion brazing manufacturing process. Therefore, designing a set of devices for the arc fusion brazing process of the connection joint of the aviation generator brush to ensure the protection effect and welding quality is crucial for controlling the protection effect and welding quality of the arc fusion brazing connection joint of the aviation generator brush and the copper wire connected thereto. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides an arc fusion brazing protection device for an aviation generator brush. This device fixes and protects the aviation generator brush, achieving the effect of improving the protection effect and welding quality of arc fusion brazing; it can avoid oxidation of the connection joint and the copper wire connected thereto, so as to meet the manufacturing technical requirements of the aviation generator brush and improve the welding quality of arc fusion brazing.

[0006] The technical solution of the present invention is as follows:

[0007] An arc fusion brazing protection device for an aviation generator brush, comprising an air vent pipe, a left protective cover, a right protective cover and fastening screws.

[0008] The air vent pipe is used to introduce inert protective gas, and is successively connected by an air vent conduit, a regular hexagonal prism and a threaded pipe. The three parts are integrally processed by mechanical turning or mechanical milling.

[0009] A threaded through hole is processed at the center position of the outer side surface of the left protective cover for threaded connection with the threaded pipe of the air vent pipe. A rectangular groove is processed in the middle of the inner side surface of the left protective cover, and a rectangular notch is processed at the top edge. The rectangular groove communicates with the rectangular notch; Threaded blind holes are processed on both sides of the rectangular groove for connection with the fastening screws.

[0010] Rectangular grooves and rectangular notches corresponding to the left protective cover are processed on the inner side surface of the right protective cover; Through holes are processed on both sides of the rectangular groove. The fastening screws sequentially pass through the through holes and the threaded holes on the left protective cover to connect and fix the left protective cover and the right protective cover. The internal space formed by the rectangular grooves of the left protective cover and the right protective cover is used to place the main body of the aviation generator brush, and the rectangular notch is used to place and fix the connection joint of the aviation generator brush.

[0011] Through the assembly of the air vent pipe, the left protective cover, the right protective cover and the two fastening screws, an arc fusion brazing protection device for an aviation generator brush is formed. After the left protective cover and the right protective cover are assembled, the space formed by the two rectangular grooves in the central area is used to place the main body part of the aviation generator brush, and the upper rectangular notch is used to place and fix the connection joint of the aviation generator brush. Adjust the relative distance between the connection joint of the aviation generator brush and the upper surface of the protective cover. When the relative distance that the upper end of the connection joint exposes the upper surface of the protective cover is 1.5 - 2 mm, tighten the fastening screws to ensure that there is no gap between the left protective cover and the right protective cover. Finally, introduce argon gas into the air vent pipe and make it fill the rectangular groove space of the arc fusion brazing protection device of the aviation generator brush to improve the protection effect of the arc fusion brazing joint and the nearby positions, and achieve the purpose of improving the welding quality.

[0012] Advantages of the present invention: The structure of the present invention is simple and the installation is convenient. It can improve the protection effect of the arc fusion brazing joint and the nearby positions, and improve the arc fusion brazing welding quality of the connection joint of the aviation generator brush. Description of the Drawings

[0013] Figure 1 It is a combined drawing of the arc fusion brazing protection device for an aviation generator brush.

[0014] Figure 2 It is a schematic structural diagram of the air vent pipe.

[0015] Figure 3 It is a schematic structural diagram of the left protective cover.

[0016] Figure 4 It is a schematic structural diagram of the right protective cover.

[0017] Figure 5 It is a schematic structural diagram of the fastening screw.

[0018] Figure 6 It is a physical diagram of the brush of the aviation generator.

[0019] In the figure: 1 ventilation pipe; 2 left protective cover; 3 right protective cover; 4 fastening screw; 5 ventilation duct; 6 regular hexagonal prism; 7 threaded pipe; 8 rectangular groove; 9 rectangular notch; 10 connection joint; 11 copper wire; 12 magnet. Specific embodiments

[0020] The following further explains the specific embodiments of the present invention in conjunction with the embodiments and the drawings, but is not used to limit the present invention.

[0021] See Figures 1 to 6 , an arc fusion brazing protection device for the brush of an aviation generator, comprising a ventilation pipe 1, a left protective cover 2, a right protective cover 3 and a fastening screw 4.

[0022] The ventilation pipe 1 is successively composed of three parts: a ventilation duct 5, a regular hexagonal prism 6 and a threaded pipe 7, and is integrally processed by mechanical turning and mechanical milling.

[0023] A threaded through hole is processed at the central position of the outer side surface of the left protective cover 2 for forming a threaded connection with the threaded pipe 7. A rectangular groove is processed in the middle of the inner side surface of the left protective cover 2, and a rectangular notch is processed at the top edge. The rectangular groove communicates with the rectangular notch; Threaded blind holes are processed on both sides of the rectangular groove for connecting the fastening screws, and then the left protective cover and the right protective cover are fixedly connected through the fastening screws.

[0024] The inner side surface of the right protective cover 3 is processed with a rectangular groove 8 and a rectangular notch 9 corresponding to the left protective cover 2; Through holes are processed on both sides of the rectangular groove, and the fastening screw 4 sequentially passes through the through holes and the threaded holes on the left protective cover 2 to fixedly connect the left protective cover and the right protective cover.

[0025] Through the assembly of the ventilation pipe 1, the left protective cover 2, the right protective cover 3 and two fastening screws 4, an arc fusion brazing protection device for the aviation generator brush is formed. After the left protective cover 2 and the right protective cover 3 are assembled, the space formed by the two rectangular grooves in the central area is used to place the main body part of the aviation generator brush, and the rectangular notch above is used to place and fix the connection joint of the aviation generator brush. Adjust the relative distance between the connection joint of the aviation generator brush and the upper surface of the protective cover. When the relative distance that the upper end of the connection joint exposes the upper surface of the protective cover is 1.5 - 2 mm, tighten the fastening screw 4 to ensure that there is no gap between the left protective cover and the right protective cover. Finally, introduce argon gas into the ventilation pipe 1 and make it fill the rectangular groove space of the arc fusion brazing protection device of the aviation generator brush, so as to improve the protection effect of the arc fusion welding joint and the nearby positions and achieve the purpose of improving the welding quality.

[0026] The technical features not detailed in this application are prior art. The above embodiments are only illustrative of the principles and effects of this application and are not used to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in this application should still be covered by the claims of this application.

Claims

1. An arc fusion brazing protection device for an aviation generator brush, characterized in that, the device includes a ventilation pipe, a left protective cover, a right protective cover and fastening screws; the ventilation pipe is used for introducing an inert protective gas; a threaded through hole is machined at the center position of the outer side surface of the left protective cover for connecting with the ventilation pipe; a rectangular groove is machined in the middle of the inner side surface of the left protective cover, and a rectangular notch is machined at the top edge, and the rectangular groove communicates with the rectangular notch; a rectangular groove and a rectangular notch corresponding to the left protective cover are machined on the inner side surface of the right protective cover; the fastening screws connect and fix the left protective cover and the right protective cover, and the internal space formed by the rectangular grooves of the left protective cover and the right protective cover is used for placing the main body of the aviation generator brush, and the rectangular notch is used for placing and fixing the connection joint of the aviation generator brush.

2. The arc fusion brazing protection device for an aviation generator brush according to claim 1, characterized in that, the ventilation pipe is sequentially connected by a ventilation conduit, a regular hexagonal prism and a threaded pipe; the threaded pipe is connected with the threaded through hole on the outer side surface of the left protective cover.

3. The arc fusion brazing protection device for an aviation generator brush according to claim 2, characterized in that, the three parts of the ventilation pipe are integrally formed by a mechanical turning or mechanical milling processing method.

4. The arc fusion brazing protection device for an aviation generator brush according to any one of claims 1-3, characterized in that, threaded blind holes are machined on both sides of the rectangular groove of the left protective cover, through holes are machined on both sides of the rectangular groove of the right protective cover, and the fastening screws sequentially pass through the through holes and the threaded blind holes on the left protective cover to connect and fix the two.

Images