Multi-step multi-edged tool for integral hole making of laminated structure parts

Abstract

The invention discloses a multi-step multi-edge tool for integrally perforating a superposed-structural part, belongs to the technical field of drilling tools in machining, and in particular relates to a multi-step multi-edge tool for integrally perforating a superposed-structural part with high quality. The tool has a pre-drilling cutting region formed by a pre-drilling main cutting edge envelope line, a chambering cutting region formed by a chamfering main cutting edge envelope line, a metal reaming cutting region of which the envelope line is in metal end hole size, a composite material reaming cutting region of which the envelope line is in composite material end hole size, a reducing region and a clamping region, wherein all the regions form a multi-step multi-edge structure of the tool; each step has a specific edge shape, a spiral angle and a tool diameter. The tool is a multi-step multi-edge drilling head integrating drilling, chamfering and reaming functions, and is particularly suitable for machining a part made of a carbon fiber enhanced composite material or having a metal superposed structure to realize high-quality and high-efficiency integrated low-damage perforation; therefore, the production cost is reduced, and the machining benefit is enhanced.

Description

technical field [0001] The invention belongs to the technical field of drilling tools in mechanical processing, and relates to a multi-step and multi-edged tool for high-quality integral hole making of laminated structural parts. Background technique [0002] Weight reduction is a necessary means for aircraft and aerospace vehicles to improve cruise and carrying capacity. Carbon fiber reinforced composite materials (composites) have the advantages of light weight and high strength. Their application can reduce structural weight and reduce manufacturing cycles. They are widely used in aviation, Component manufacturing for aerospace equipment. However, composite members have poor bearing capacity in interlayer directions and cannot bear multi-directional complex loads. Therefore, only light-weight and high-strength metals can be used in some parts. For the final assembly, composite materials and metal components are usually overlapped to form laminated structural parts, and m...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems such as delamination, burrs, tearing and other damages at the entrance of the carbon fiber reinforced composite material when drilling and processing the hole of the carbon fiber reinforced composite material / metal laminated structure part as a whole, and the roughness of the metal hole wall is poor. In order to solve the problems of poor consistency of apertures between composite materials and metals, and low tool life, a multi-step multi-edged tool for high-quality overall hole-making of laminated structural parts was invented.

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