Drill bit convenient for chisel edge corner inspection during grinding and manufacturing method of drill bit

Abstract

The invention belongs to the technical field of machining cutting tools, and specifically relates to a drill bit convenient for chisel edge corner inspection during grinding and a manufacturing methodof the drill bit. The inspection drill bit comprises a twist drill main body, a chisel edge, a main cutting edge A, a main cutting edge B, a cutting groove A and a cutting groove B, wherein the chisel edge is arranged at the top end of the twist drill main body; the main cutting edge A and the main cutting edge B are separately arranged and symmetrical to the center of the chisel edge; an intersection point of the main cutting edge A and the chisel edge and an intersection point of the main cutting edge B and the chisel edge are a chisel edge corner A and a chisel edge corner B, respectively;the twist drill main body is separately provided with the cutting groove A and the cutting groove B along the main cutting edge A and the main cutting edge B; and a pre-carved chisel edge corner pathA and a pre-carved chisel edge corner path B are separately carved in the cutting groove A and the cutting groove B. The drill bit convenient for chisel edge corner inspection during grinding and themanufacturing method of the drill bit have the advantages of reducing the difficulty of twist drill grinding, reducing the time required for grinding, improving grinding precision, and reducing wearand tear of the twist drill due to grinding.

Description

technical field [0001] The invention belongs to the technical field of machining tools, and in particular relates to a drill bit which is convenient for detecting the rotation point of a chisel edge during grinding and a manufacturing method thereof. Background technique [0002] Twist drill is a commonly used tool in machining, and it is also a fragile tool. It needs repeated grinding during use. If the grinding is not good, it will affect the drilling quality and life of the twist drill. When grinding manually In order to check whether the turning points of the two chisel edges of the twist drill are correct, it is necessary to visually measure the length of one main cutting edge from the front, and then visually measure the length of the other main cutting edge after turning 180 degrees. Repeated comparisons and repeated grinding. Because this kind of comparison has a time and space distance, it is difficult to ensure the accuracy of this method. Even if you use a caliper...

AI Technical Summary

Problems solved by technology

Because this kind of comparison has a time and space distance, it is difficult to ensure the accuracy of this method. Even if you use a caliper to measure, because there is no reliable card point, the measurement accuracy is also difficult to grasp.

When grinding with a grinding machine, the ordinary grinding machine only ensures that the grinding angle is suitable, but does not guarantee that the lengths of the two main cutting edges are equal

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