Step drill

Abstract

The invention discloses a step drill which comprises a drill handle and a drill body connected at one end of the drill handle. One end, far away from the drill handle, of the drill body forms a drill tip, a helical drilling discharging groove is arranged on an outer side face, along the axial direction of the drill body, of the drill body, a cutting blade is formed at the junction of the drilling discharging groove and the outer side face of the drill body, the drill body comprises a first drill body and a second drill body, the drill tip is formed at one end of the first drill body, the other end of the first drill body is fixedly connected at one end of the second drill body, the other end of the second drill body is fixedly connected with one end of the drill handle, and the outer diameter of the first drill body is smaller than that of the second drill body. Two parts are arranged on the drill body, and the outer diameter of a drill tip part is smaller than that of the other part, so that a front end of the step drill can firstly drill a position of a small hole positioning hole, then a rear end of the step drill is processed, the problem of hole position deviation can be effectively solved, and product quality is improved.

Description

technical field [0001] The invention relates to a drill for product processing, in particular to a stepped drill. Background technique [0002] At present, the hole position of the product is processed by one-time drilling. For products with deep holes and sand holes in die-casting, it is easy to produce hole position deviation, which affects product quality and quality. Contents of the invention [0003] In order to overcome the above defects, the present invention provides a step drill, which can effectively improve the problem of hole position deviation. [0004] The technical solution adopted by the present invention in order to solve the technical problem is: a step drill, comprising a drill shank and a drill body, the drill body is connected to one end of the drill shank, and the end of the drill body away from the drill shank forms a drill point, the drill The outer surface of the body is provided with a helical cuttings discharge groove along its axial direction, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the hole position of the product is processed by drilling once. For products with deep holes and sand holes in die-casting, it is easy to produce hole position deviation, which affects product quality and quality.

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