A milling and drilling compound processing tool

Abstract

The invention discloses a milling and drilling combined machining cutter. The milling and drilling combined machining cutter comprises a cutter body and a cutter handle; the cutter body comprises a drilling part, a milling part and a guide part which are arranged in sequence; the guide part is connected with the cutter handle; the drilling part is positioned at the front end of the milling part; the milling part has certain conicity; the guide part comprises at least two long helical chip discharging grooves which extend from the drilling part to the cutter handle; a part, positioned between two adjacent long helical chip discharging grooves, of the cutter body forms a blade petal; the side surface, close to the long helical chip discharging grooves and opposite to the rotating direction of the cutter body, of the blade petal is provided with a cylindrical guide blade strip; the side surface, opposite to the rotating direction of the cutter body, of each long helical chip discharging groove is intersected with the milling part to form a taper long milling blade; the blade petal is provided with at least one short helical chip discharging groove which extends from the milling part to the guide part; and the milling part is intersected with the side surface, opposite to the rotating direction of the cutter body, of each short helical chip discharging groove to form a taper short milling blade. Under a composite material drilling machining condition, the milling and drilling combined machining cutter disclosed by the invention can reduce an axial cutting force so as to prevent defects of layering, cracks and burrs generated at the outlet of a machined hole.

Description

technical field [0001] The invention relates to the field of composite material cutting, in particular to a milling and drilling composite processing tool. Background technique [0002] Composite materials have a series of advantages such as high specific strength, large specific modulus, fatigue resistance, and corrosion resistance. At present, the application prospects in the aerospace field are very broad, especially fiber reinforced composites (FRP), which are widely used in aircraft wings. and tail rudder. The wings and tail rudder need to process thousands of riveting or screwing holes because they need to be assembled and connected with the aircraft fuselage. Due to the particularity of the fiber composite manufacturing process, its mechanical properties are anisotropic, and the interlayer strength is low. During the process of drilling riveted or screwed holes, defects such as delamination and tearing are prone to occur due to the action of axial cutting force. , w...

AI Technical Summary

Problems solved by technology

Yet the first apex angle of this invention is 60 °~80 °, and the taper transition area angle is 2 °~8 °, and the taper angle of apex angle and transition area is all designed less, makes drilling position very long, and drill bit is not It is suitable for processing blind holes on thick parts, and when processing through holes, it is also required that there must be enough space at the exit of the hole to allow the drill tip to drill out

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