Double-angle composite conical surface counter bore machining tool

Abstract

The invention provides a double-angle composite conical surface counter bore machining tool. The double-angle composite conical surface counter bore machining tool comprises a guide shaft, a blade part and a handle part. The guide shaft is arranged at the front end of the double-angle composite conical surface counter bore machining tool, the blade part is located at the middle portion of the tool, the handle part is located at the rear end of the tool, and the guide shaft, the blade part and the handle part are integrated. A cutting blade of the blade part comprises a 45-degree counter bore conical surface machining cutting blade body and a 90-degree counter bore conical surface machining cutting blade body. According to the provided double-angle composite conical surface counter bore machining tool, the counter boring machining quality and efficiency of super-strength steel for counter bore assembling for bolts with round root chamfers are improved, and accordingly the assembling quality of the bolts with the round root chamfers is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a double-angle compound conical surface sinking tool. Background technique [0002] With the development of the aviation manufacturing industry, bolts with round root chamfers have been more and more widely used in the assembly connection of aircraft. However, the 90° conical counterbore without round root chamfered bolt assembly can no longer meet the assembly and connection requirements of the round root chamfered bolt. The toroidal surface at the root chamfer interferes, so it cannot meet the technical requirements of the aircraft assembly design. Therefore, in order to solve the problem that the intersection of the cylindrical surface of the bolt assembly hole and the conical surface of the counterbore at 90° will be chamfered with the circular root of the bolt To avoid the interference of the circular surface at the corner, a 45° conical surface mu...

AI Technical Summary

Problems solved by technology

Another method is to use a combination of carbon structural steel guide shaft and high-speed steel countersink body. The countersink of this structure can only complete the countersinking of aluminum alloys with round roots and chamfered bolts to assemble countersinks, and The service life of the countersink drill with this structure is very low, especially for the cutting edge of the 45° conical surface of the counterbore, because of its poor strength, the one-time life is very low

These two processing methods have poor precision, low efficiency and low tool life. Therefore, they cannot better meet the requirements of high-precision and high-efficiency assembly of bolts with round root chamfers.

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