Combined drill molding milling cutter and manufacturing method thereof

Abstract

The invention discloses a combined drill molding milling cutter and a manufacturing method thereof. The combined drill molding milling cutter comprises a handle part and a drill body which are both in a cylinder structure, wherein the diameter of the handle part is larger than the diameter of the drill body; the handle part, the drill body and a transition section in a cylinder structure are sequentially and coaxially connected; the diameter of the transition section is smaller than the diameter of the drill body; the transition section, a cone frustum and a drill bit section in a cylinder structure are sequentially and coaxially connected; the lower end of the drill bit section is contracted into a drill bit structure; the diameter of the drill bit section is taken as the diameter of a processed flange rivet hole; an included angle formed by the side of the cone frustum and a central axis is taken as a chamfer of the processed flange rivet hole; the diameter of the drill body serves as the outer diameter of the molding milling cutter; however, the diameter of the transition section is smaller than the inner diameter of the molding milling cutter; the drill bit section, the cone frustum, the transition section and a continuous chip groove in the surface of the drill body are arranged from the peak of the drill bit structure along the axial processing route; a coil type molding milling cutter is arranged on the section of the lower end of the drill body; and the central axis of the molding milling cutter and the central axis of the drill body are overlapped. The processing procedures for the flange rivet hole and a valve seat molding hole are simplified.

Description

technical field [0001] The invention relates to the technical field of precision machining, in particular to a compound drill forming milling cutter and a manufacturing method thereof. Background technique [0002] In the process of air-conditioning compressor bearing flange rivet holes and valve seat forming holes, the traditional method is to use independent ordinary drills and forming milling cutters to process flange rivet holes and valve seat forming holes respectively, and then use a chamfer The knife is used to process the chamfer of the flange rivet hole. In practice, it is found that in the process of processing the flange rivet holes and the valve seat forming holes, the processing devices need to be replaced frequently, resulting in many shortcomings such as complex processing procedures and cumbersome processing; in addition, due to the chamfering process of the flange rivet holes and the There are positioning errors in the drilling process. Using separate devic...

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Problems solved by technology

[0003] The embodiment of the present invention discloses a compound drill forming milling cutter and a manufacturing method thereof, which can solve the problem of simplifying the processing procedures of flange rivet holes and valve seat forming holes, and avoid that the chamfering of the chamfering knife is different from the size of the hole of the ordinary drill bit. Matching issues to reduce the risk of rework or scrap

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