Step molding drill for pore forming on carbon fiber plate

Abstract

The invention discloses a step molding drill for pore forming on a carbon fiber plate. The step molding drill comprises a drill bit, a chamfering knife and a handle, wherein the drill bit, the chamfering knife and the handle are coaxially connected in sequence; the drill bit comprises two spiral drill blade parts which are arranged in a central symmetry manner; spiral drill hole chip areas are encircled between the corresponding front blade surfaces and blade back surfaces on the two drill blade parts; the drill blade parts comprise drill tip cone edges, spiral peripheral edges as well as second and third cone edges which are sequentially connected between the drill tip cone edges and the spiral peripheral edges; the chamfering knife comprises two spiral chamfering blade parts arranged in a central symmetry manner; spiral chamfering chip areas are encircled between the corresponding front blade surfaces and blade back surfaces on the two chamfering blade parts; the chamfering blade parts comprise chamfering cone edges and circumferential secondary edges; the chamfering cone edges and the spiral circumferential edges are connected to form steps; and the drill hole chip areas are communicated with the chamfering chip areas.

Description

technical field [0001] The invention relates to the field of hole-making cutters, in particular to a forming step drill used for hole-making and hole shoulder chamfering in the process of processing carbon fiber plates. Background technique [0002] At present, more and more composite materials are used in general-purpose aircraft at home and abroad, especially in light general-purpose aircraft. Aircraft wings (including spars, stringers and skins), fuselage, empennage, skins, fuel tanks, and engine compartments are all made of composite materials, and hole making is the most important process in the manufacturing process of fiber-reinforced composite materials. One of, and the existing process is manual pneumatic tools for processing. [0003] Since the fiber-reinforced composite material is a two-phase or multi-phase structural material mixed with a soft and viscous matrix material and a high-strength, high-hardness fiber-reinforced material, its anisotropy, low thermal c...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a forming step drill for making holes on carbon fiber boards. The main technical problem to be solved is: when traditionally processing and making holes on reinforced composite materials such as carbon fiber boards, the drilling and hole shoulder chamfering are respectively It is completed by two tools, so the processing technology is relatively complicated, the tool needs to be changed midway, and the purchase cost is high

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