Integral hard alloy A-shaped center drill

Abstract

The invention discloses an integral hard alloy A-shaped center drill. The integral hard alloy A-shaped center drill comprises a drill handle, a drill bit, an oblique tool bit, an oblique groove, a center column, a straight tool bit, a straight groove, a clamping block, an identification board and identification rings. The main drill handle is provided with the identification rings, the identification rings are uniformly distributed at intervals, the identification rings correspond to different depth identification, the identification rings are circumferentially arranged, the identification rings can also control the depth in the rotation process of the center drill, the precision of a thread machining process is improved, the drill handle is provided with the symmetric clamping blocks, theclamping blocks can fix the drill handle, the rotating deflection of the drill handle in the application process is avoided, the drill bit is provided with the oblique tool bit, a large-area materialcan be cut and milled, the cross symmetric straight tool bit is arranged on the center column, the connection strength of a center cone can be improved, while the boring speed is increased, the sufficient strength and wear resistance can also be ensured, and the service life of the center drill is prolonged.

Description

technical field [0001] The invention relates to a center drill, in particular to an A-type center drill of solid carbide, belonging to the technical field of processing equipment. Background technique [0002] Prefabricated and precise positioning for hole processing, guiding twist drills for hole processing, and reducing errors. The center drill is used for machining the center hole on the end face of parts such as shafts. The product cuts lightly and has good chip removal. There are two types of center drills: Type A: center drill without cone, type B: center drill with cone, when machining a center hole with a diameter of d = 2 ~ 10mm, the center drill without cone is usually used ( Type A); For workpieces with a long process and high precision requirements, in order to avoid damage to the 60-degree centering cone, a center drill with a protective cone (Type B) is generally used. The center hole is the positioning base surface for the shaft workpiece to be installed on...

AI Technical Summary

Problems solved by technology

[0003] The traditional A-type center drill, the connection strength of the center cone is not enough, it cannot withstand long-term operation wear, and it is easy to be damaged during use. At the same time, the smooth drill shank is easy to slide during the drilling process, which affects the processing accuracy. It is not easy to estimate the depth when drilling holes with ordinary center drills, and it is inconvenient to control

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