Drilling and chamfering integrated composite drilling device

Abstract

A drilling and chamfering integrated composite drilling device comprises a drill bit 1, an inner hexagonal flat end set screw 2 and a chamfering bit 3; the left of the drill bit 1 is of a drilling structure, the right end of the drill bit 1 is connected with the chamfering bit 3 through the inner hexagonal flat end set screw 2, and the part, containing the inner hexagonal flat end set screw 2, of the right end of the drill bit 1 is of a slope structure 4, so that after the inner hexagonal flat end set screw 2 is mounted in the slope structure, the drill bit 1 cannot move at the horizontal position; the chamfering bit 3 is of a cylindrical structure, the radius of the part, containing the inner hexagonal flat end set screw 2, of the middle of the chamfering bit is larger than that of the left end and the right end, and a mounting hole used for inserting of the right end of the drill bit 1 is formed in the chamfering bit 3.

Description

technical field [0001] The technology belongs to the field of hole making, and in particular relates to a drill-and-draw integrated composite hole-making device. Background technique [0002] In aerospace products, in addition to bolt connection, riveting is widely used in mechanical connection methods. Compared with bolted connections, riveting can greatly reduce the weight of products. The riveting structure is light in weight, wide in application range, relatively stable in quality and low in cost, and is one of the most widely used connection methods. A countersunk rivet is a part that uses its own deformation or interference to connect the riveted parts during riveting. Countersunk head rivets are widely used in the assembly of shell sections, and the rivet heads are all sunk into the connected parts, and are mostly used in occasions where the outer surface is required to be smooth. figure 1 It is a schematic diagram of the countersunk rivet structure. [0003] The ...

AI Technical Summary

Problems solved by technology

[0005] 1. After drilling through holes on the warhead shell with a twist drill, it is necessary to dimple the through holes to ensure that the head of the countersunk rivet does not protrude from the surface of the shell. The dimple consistency is poor, resulting in the phenomenon that the rivets cannot be penetrated smoothly when assembling countersunk rivets;

[0006] 2. When using twist drills and pocket drills to process countersunk head rivet mounting holes, the drill bit needs to be replaced every time a mounting hole is processed, resulting in low processing efficiency and high labor intensity, which is not conducive to the batch production requirements of the product

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