Cone angle drill

Abstract

The invention discloses a cone angle drill. The cone angle drill comprises a clamping head and a working position, wherein the clamping head is connected with external equipment such as a drilling machine or a pistol drill clamping part; the working position consists of double helixes which divide the working position into a two-way cutting face and two rotationally symmetrical material return chutes; the cutting face comprises a cutting blade and a retracting face; and the cutting blade is positioned at a position where the cutting face begins to contact a workpiece. When the upper part of the cutting face is close to the clamping head, rotation radiuses of the double helixes are consistent, and external diameters of the double helixes are invariable; when the cutting face is positioned in a middle section, the rotation radiuses of the double helixes are gradually reduced, and the external diameters are gradually reduced to form a cone; and when the cutting face is positioned at the bottom, the rotation radiuses of the double helixes are consistent again, and the external diameters are invariable to form a straight hole section. The rotation radiuses of the double helixes on the upper and lower parts are consistent with the maximum and minimum rotation radiuses of the cone; a cone angle of the cone can be selected as required; the length of the straight hole section at the bottom of the cutting face can meet the straight hole premachining requirement of a machined piece; and the position where the bottom of the cutting face begins to contact the workpiece is machined into the cutting head with a certain cutting angle.

Description

Technical field [0001] The invention belongs to the field of general-purpose mechanical drill bits, and relates to a novel cone-angle drill bit. Background technique [0002] The tapered hole has always been a very important mechanical structure that is easy to be overlooked but is actually very important. It can save the overall space of the machine and make it beautiful, such as countersunk screws; it can have tightness of sealing, and insulation, such as tapered surface Add rubber pads for thread locking; in addition, the tapered hole structure also has functions such as axis alignment and limit. However, only from the structural point of view, the tapered hole model is relatively simple; in fact, from the processing point of view, it is by no means easy. The main methods currently available are: [0003] ①. The size of the taper hole to be processed is large, and the diameter of the middle diameter hole is tens of centimeters. In this case, a taper impact drill or a compound ...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problems of many processes, low precision of the tapered surface, excessive processing cost, and no suitable processing method for small-sized tapered holes in the existing tapered hole machining process. Low, especially suitable for machining tapered holes with a diameter of middle diameter between 0.5mm and 15mm, and it has been verified by experiments, and the taper angle drill bit with good parameters such as the tapered surface of the workpiece

Images