Punching and positioning device for multiple small bushings of aircraft discharger

Abstract

The utility model relates to the technical field of aviation clamps, in particular to a multi-piece punching and positioning device for small bushings of an aircraft discharger, which comprises a four-claw threaded opening tire and a tightening nut. The front end of the four-claw thread opening tire is a clamping part, the rear end of the four-claw thread opening tire is a cylindrical clamp base body, and the clamping part and the cylindrical clamp base body are coaxial; the clamping part is provided with an external thread; a clamping hole is formed in the front end of the clamping part along the central axis, the hole diameter is matched with the diameter of a to-be-machined small bush, the hole depth is multiple times of the thickness of the to-be-machined small bush, a blind hole is formed in the bottom of the hole along the central axis, and the blind hole and the clamping part are the same in depth; the front end of the clamping part is cut into four uniformly distributed parts along the axial direction to form four claws with an elastic function; and the tightening nut is screwed in from the clamping part, and the diameters of the openings of the four claws at the front end of the clamping part can be reduced by screwing the tightening nut, so that a plurality of small bushings placed in the clamping hole are clamped. A plurality of small bushings can be rapidly clamped and positioned, repeated disassembly and assembly are not needed, and deformation and clamping damage are not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation fixture tools, in particular to a multi-piece punching and positioning device for a small bushing of an aircraft discharger. Background Art

[0002] At the wing tips and trailing edges of components such as aircraft wings, horizontal tails, and vertical tails, static charges are likely to accumulate in large areas. Electrostatic dischargers need to be installed in these parts to smoothly release the static charges on the aircraft body. There is a cylindrical component called a small bushing in the internal combined parts of the aircraft discharger. Its size is very small, with an outer diameter of 5 mm, a thickness of 2 mm, and a central hole diameter of 0.7 mm. During ground inspection and maintenance, it is often necessary to replace this small bushing to ensure the normal operation of the aircraft discharger and thus ensure flight safety. For such small-sized consumable parts, they are mostly prepared in the maintenance workshop. The manufacturing method is to drill a 0.7-mm hole along the axis in the center of the small-sized cylindrical component.

[0003] For the positioning and punching of small-diameter parts, the current method mainly uses a single-sided open tire form for clamping and drilling. In actual operation, the above-mentioned existing technologies have the following deficiencies: First, the wall thickness of the existing single-sided open tire is relatively thin, and only one part can be clamped at a time. The fixture is prone to deformation after multiple clamps, resulting in difficult subsequent part clamping and inaccurate drilling positioning. Second, the auxiliary time for clamping parts during processing with the existing single-sided open tire is relatively long. During processing, the part needs to be first placed into the single-sided open tire, and then the single-sided open tire is firmly clamped on the three-jaw chuck of the machine tool. The above actions need to be repeated for each part processed. This not only has low work efficiency, the parts are prone to deformation and clamping damage, but also increases the labor intensity of workers, making the product quality unable to be continuously and effectively guaranteed. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a multi-piece punching and positioning device for a small bushing of an aircraft discharger, which has accurate positioning, can clamp multiple small cylinders at one time for simultaneous hole making, and does not need to be removed from the chuck each time.

[0005] The technical solution of the utility model is as follows:

[0006] A multi-piece punching and positioning device for a small bushing of an aircraft discharger, comprising a four-jaw threaded open tire and a tightening nut;

[0007] The front end of the four-jaw threaded split chuck is a clamping part for positioning and clamping multiple small bushings to be processed; the rear end of the four-jaw threaded split chuck is a cylindrical fixture base for being clamped by the three-jaw chuck of the machine tool; the clamping part and the cylindrical fixture base are coaxial; the clamping part is provided with an external thread; the front end of the clamping part is provided with an external cone; the rear end of the clamping part has an external thread relief groove at the tail of the external thread; the front end of the clamping part is provided with a clamping hole along the central axis, and the aperture of the clamping hole matches the diameter of the small bushing to be processed; the depth of the clamping hole is several times the thickness of the small bushing to be processed, and multiple small bushings can be clamped at one time; a blind hole is provided at the bottom of the clamping hole along the central axis, and the blind hole has the same depth as the clamping part; the front end of the clamping part is axially cut into four evenly distributed parts to form four jaws with elastic functions, which is convenient for putting the small bushing into the clamping hole;

[0008] The external shape of the tightening nut is an ordinary hexagonal nut; the front end of the inside of the tightening nut is provided with an internal cone, and the taper of the internal cone is the same as the taper of the external cone at the front end of the clamping part, and the minimum cone diameter of the internal cone is slightly larger than the minimum cone diameter of the external cone at the front end of the clamping part, which is convenient for introducing the taper during clamping; the rear end of the inside of the tightening nut is provided with an internal thread, and the internal thread matches the external thread of the clamping part; the inside of the tightening nut has an internal thread relief groove at the tail of the internal thread;

[0009] The tightening nut is screwed into the front clamping part of the four-jaw threaded split chuck. By tightening the tightening nut, the opening diameter of the four jaws at the front end of the clamping part can be forced to shrink, so as to clamp multiple small bushings placed in the clamping hole.

[0010] Furthermore, the depth of the clamping hole shall not exceed two-thirds of the length of the external thread of the clamping part to prevent the small bushings located inside the clamping hole from being clamped insecurely.

[0011] Furthermore, the four-jaw threaded split chuck and the tightening nut are made of 45 steel.

[0012] During use, the cylindrical fixture base at the rear end of the four-jaw threaded split chuck is clamped to the three-jaw chuck of the machine tool. Then, multiple small bushings to be clamped are simultaneously placed into the clamping hole at the front clamping part of the four-jaw threaded split chuck at one time. The tightening nut is screwed into the front clamping part of the four-jaw threaded split chuck. By tightening the tightening nut, the opening diameter of the four-jaw split chuck at the front end of the clamping part is forced to shrink, so as to clamp the small bushings placed in the clamping hole. After clamping, the center of the small bushing coincides with the axis of the four-jaw threaded split chuck, that is, the clamping and positioning of multiple small bushings placed in the clamping hole are completed, and the required holes can be drilled along the axis of the four-jaw threaded split chuck.

[0013] Beneficial effects

[0014] The utility model provides a multi-piece punching positioning device for small bushings of aircraft dischargers. By setting clamping holes with a hole depth that is a multiple of the thickness of the small bushings, multiple small bushings can be clamped at one time for punching processing, with high work efficiency. By using a four-jaw threaded split chuck in cooperation with a tightening nut, multiple small bushings can be quickly clamped, without the need for multiple disassembly and assembly, and it is not easy to deform and be scratched. By making the clamping holes and the clamping part coaxial, the punching position can be efficiently and accurately positioned, and the product quality is good. The design of the utility model is simple and reasonable, easy to operate, and can greatly reduce the production cost in mass production. Brief Description of the Drawings

[0015] Figure 1 is an overall structure assembly schematic diagram of an embodiment of the utility model;

[0016] Figure 2 is a schematic diagram of the structure of the four-jaw threaded split chuck of an embodiment of the utility model;

[0017] Figure 3 is a schematic diagram of the structure of the tightening nut of an embodiment of the utility model;

[0018] Figure 4 is an overall schematic diagram after clamping is completed in an embodiment of the utility model;

[0019] In the figure: 1 - four-jaw threaded split chuck; 11 - clamping part; 111 - external thread; 112 - external cone; 113 - external thread relief groove; 114 - clamping hole; 115 - blind hole; 116 - four jaws; 12 - cylindrical fixture base; 2 - tightening nut; 21 - internal cone; 22 - internal thread; 23 - internal thread relief groove; 3 - small bushing to be processed; 4 - machine tool three-jaw chuck. Detailed Embodiment

[0020] The following further describes the present utility model in detail with reference to the drawings and the detailed embodiment:

[0021] An embodiment of the present utility model is as Figure 1 shown. A multi-piece punching positioning device for small bushings of aircraft dischargers includes a four-jaw threaded split chuck 1 and a tightening nut 2;

[0022] As Figure 2As shown, the front end of the four-jaw threaded open tire 1 is a clamping portion 11, which is used to position and clamp multiple small bushings 3 to be processed; the rear end of the four-jaw threaded open tire 1 is a cylindrical fixture base 12, which is used to be clamped by the three-jaw chuck 4 of the machine tool; the clamping portion 11 and the cylindrical fixture base 12 are coaxial; the clamping portion 11 is provided with an external thread 111; the front end of the clamping portion 11 is provided with an external cone 112; the rear end of the clamping portion 11 is a thread relief groove 113 at the tail of the external thread 111; the front end of the clamping portion 11 is provided with a clamping hole 114 along the central axis, and the aperture of the clamping hole 114 matches the diameter of the small bushing 3 to be processed; the depth of the clamping hole 114 is five times the thickness of the small bushing 3 to be processed, and five small bushings 3 can be clamped at one time; a blind hole 115 is provided at the bottom of the clamping hole 114 along the central axis, and the blind hole 115 has the same depth as the clamping portion 11; the front end of the clamping portion 11 is axially cut into four evenly distributed parts to form four jaws with elastic functions, which is convenient for putting the small bushing into the clamping hole; Figure 2 One of the four jaws 116 is shown;

[0023] As Figure 3 As shown, the external shape of the tightening nut 2 is an ordinary hexagonal nut; the front end of the inside of the tightening nut 2 is provided with an internal cone 21, and the taper of the internal cone 21 is the same as the taper of the external cone 112 at the front end of the clamping portion 11, and the minimum cone diameter of the internal cone 21 is slightly larger than the minimum cone diameter of the external cone 112 at the front end of the clamping portion 11, which is convenient for the introduction of the taper during clamping; the rear end of the inside of the tightening nut 2 is provided with an internal thread 22, and the internal thread 22 matches the external thread 111 of the clamping portion 11; the inside of the tightening nut 2 is an internal thread relief groove 23 at the tail of the internal thread 22;

[0024] The tightening nut 2 is screwed into the front clamping portion 11 of the four-jaw threaded open tire 1. By tightening the tightening nut 2, the opening diameter of the four jaws at the front end of the clamping portion 11 can be forced to shrink, so as to clamp multiple small bushings 3 placed in the clamping hole 114.

[0025] In this embodiment, the depth of the clamping hole 114 is five times the thickness of the small bushing 3 to be processed, and does not exceed two-thirds of the length of the external thread 111 of the clamping portion 11, so as to prevent the small bushings located inside the clamping hole 114 from being clamped insecurely.

[0026] In this embodiment, the four-jaw threaded open tire and the tightening nut are made of 45 steel.

[0027] As Figure 1As shown, when using the above embodiment, the cylindrical fixture base 12 at the rear end of the four-jaw threaded open tire 1 is clamped to the three-jaw chuck 4 of the machine tool. Then, five small bushings 3 to be clamped are simultaneously placed into the clamping holes 114 of the front clamping portion 11 of the four-jaw threaded open tire 1 at one time. The tightening nut 2 is screwed into the front clamping portion 11 of the four-jaw threaded open tire 1. By tightening the tightening nut 2, the diameter of the front end of the four-jaw open tire at the front end of the clamping portion 11 is forced to shrink, so as to clamp the small bushing 3 placed in the clamping hole 114. After clamping, the center of the small bushing 3 coincides with the axis of the four-jaw threaded open tire 1, that is, the clamping and positioning of multiple small bushings 3 placed in the clamping hole 114 are completed; after the clamping is completed, as Figure 4 shown, drill the required holes along the axis of the four-jaw threaded open tire 1.

[0028] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principle and purpose of the present invention.

Claims

1. A multi-piece punching and positioning device for the small bushing of an aircraft discharger, characterized in that: It includes a four-jaw threaded split chuck and a tightening nut; The front end of the four-jaw threaded split chuck is a clamping part; the rear end of the four-jaw threaded split chuck is a cylindrical fixture base; the clamping part and the cylindrical fixture base are coaxial; the clamping part is provided with an external thread; the front end of the clamping part is provided with an external cone; the rear end of the clamping part is provided with an external thread relief groove at the tail of the external thread; a clamping hole is provided along the central axis at the front end of the clamping part, and the aperture of the clamping hole matches the diameter of the small bushing to be machined; the depth of the clamping hole is several times the thickness of the small bushing to be machined, and multiple small bushings can be clamped at one time; a blind hole is provided along the central axis at the bottom of the clamping hole, and the blind hole has the same depth as the clamping part; the front end of the clamping part is axially cut into four evenly distributed parts to form four jaws with elastic functions, which is convenient for putting the small bushing into the clamping hole; The external shape of the tightening nut is an ordinary hexagonal nut; an internal cone is provided at the front end inside the tightening nut, and the taper of the internal cone is the same as the taper of the external cone at the front end of the clamping part, and the minimum cone diameter of the internal cone is slightly larger than the minimum cone diameter of the external cone at the front end of the clamping part, which is convenient for introducing the taper during clamping; an internal thread is provided at the rear end inside the tightening nut, and the internal thread matches the external thread of the clamping part; an internal thread relief groove is provided at the tail of the internal thread inside the tightening nut; The tightening nut is screwed into the front clamping part of the four-jaw threaded split chuck. By tightening the tightening nut, the opening diameter of the four jaws at the front end of the clamping part can be forced to shrink, so as to clamp multiple small bushings placed in the clamping hole.

2. The multi-piece punching and positioning device for the small bushing of an aircraft discharger according to claim 1, wherein: The depth of the clamping hole shall not exceed two-thirds of the length of the external thread of the clamping part.

3. The multi-piece punching and positioning device for the small bushing of an aircraft discharger according to claim 1, wherein: The four-jaw threaded split chuck and the tightening nut are made of 45 steel.

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