CN203061936U

CN203061936U - Drill bit with milling function

Info

Publication number: CN203061936U
Application number: CN 201320074898
Authority: CN
Inventors: 李茗; 王丽; 王臣; 于志生; 窦文隆
Original assignee: 李茗
Priority date: 2013-01-30
Filing date: 2013-01-30
Publication date: 2013-07-17
Anticipated expiration: 2023-01-30

Abstract

The utility model relates to a drill bit with a milling function and solves the problems of simplex function, poor rigidity and quick abrasion of a conventional twist drill. The drill bit with the milling function comprises a cutting part, a guiding part and a connecting part, wherein a generally known drilling cutter tooth is arranged at the end part of the drill bit; and a seamed edge at the guiding part of an original drill bit is ground to form a front angle and a rear angle to form a cylindrical surface edge of a cylindrical plane milling cutter, wherein the front angle is 5 to 10 degrees, and the rear angle is 8 to 12 degrees. When the front angle is 8 degrees and the rear angle is 10 degrees, the effects of milling and drilling are optimal. Since the seamed edge at the guiding part of the drill bit disclosed by the utility model is provided with the front angle and the rear angle, a milling cutter edge is formed, so that the drill bit has the function of cutting a hole wall. On the basis of keeping a drilling function, the drill bit further can perform plane processing to a hole diameter in the vertical direction like the plane milling cutter, so that the drill bit has the function of the plane milling cutter, and the precision and smoothness of the wall of a drilled hole and the guide function are improved; and meanwhile the rigidity, vibration resistance, service life and cutting efficiency are increased.

Description

A kind of drill bit with the milling function

Technical field:

The utility model relates to a kind of drill bit, is specifically related to a kind of drill bit with the milling function.

Background technology:

Fluted drill is made up of cutting portion, guide part and connecting portion.Cutting portion and guide part are operate portions, and operate portions has two helicla flutes, and whole drill bit only has two cutters tooth in the termination, form the cutting of vertical feed direction.There is following deficiency in its function of this drill bit with aspect of performance: drill bit participates in cutting when only making rotation and vertical feed rectilinear motion on the plane of vertical drilling rod, can only hole or reaming function singleness; Unbearable diameter increases from the cutting tip to the shank gradually, and unbearable diameter is little, and targeting part has a back draught in addition, influences drill bit rigidity, vibration resistance and guiding stability; The geometric parameter of cutting edge sharply changes, and particularly front edge changes more outstanding; (being on the front cutting edge) its relief angle is zero degree on the seamed edge sword, forms friction at hole wall in the work, and the wearing and tearing of aggravation drill bit influence hole wall precision and fineness.

Summary of the invention:

The utility model has solved the problem of function singleness, poor rigidity and the quick abrasion of present fluted drill existence by a kind of drill bit with the milling function is provided.

The utility model is realized by following technical scheme:

A kind of drill bit with the milling function comprises cutting, leads and is connected three parts, and the drill bit end is known boring cutting cutter tooth, angle before and after the seamed edge sharpening that former drill guide is divided is made, form the cylinder sword of plain milling cutter, wherein anterior angle is 5 °～10 °, and relief angle is 8 °～12 °.

When anterior angle is 8 °, when relief angle is 10 °, milling and drilling best results.

The utility model makes its seamed edge of targeting part of drill bit that the angle, front and back arranged, and forms the milling cutter sword, has had the cutting function to hole wall.On the basis that keeps the boring function, can also process doing the plane on the vertical direction of aperture by similar plain milling cutter, new function with plain milling cutter, and improved hole wall precision and fineness and the guide function of boring, improve rigidity, vibration resistance and service life and the stock-removing efficiency of drill bit simultaneously.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the A-A cutaway view of Fig. 1.

The specific embodiment:

As Figure 1-3, tip of the present utility model is the cutting tip 4 of former drill bit, is made up of main cutting edge 2 and helicla flute 3.Its targeting part 5 is the plain spiral milling cutter structure, and namely the seamed edge sharpening of former drill bit is made the cylinder sword of angle, certain front and back, formation plain milling cutter.In order to keep drill bit chip removal ability, helical flue of drill 3 still is two.The work termination is cutter tooth 1, and the cutter tooth tapering can grind into required angle and shape.

In the utility model, targeting part 5 is the equal diameter cylinder of zero draft, and the concrete angle at the angle, front and back that the seamed edge sharpening is made is that anterior angle is 5 °～10 °, and relief angle is 8 °～12 °.Thereby can do plane processing to the vertical direction of hole axle.Coupling part 6 can be the threaded taper shank shape of tapering.In the utility model, when anterior angle is 8 °, when relief angle is 10 °, milling and drilling best results.

The utility model can the many usefulness of a cutter, not only can machining hole but also can the milling plane.Can be competent at rat holing, semicircle orifice or hole at sphere can also be widely used in manufacturing gear strip or teeth groove.

Claims

1. drill bit with the milling function, comprise cutting, lead and be connected three parts, it is characterized in that: the drill bit end is known boring cutting cutter tooth, angle before and after the seamed edge sharpening that former drill guide is divided is made, form the cylinder sword of plain milling cutter, wherein anterior angle is 5 °～10 °, and relief angle is 8 °～12 °.

2. a kind of drill bit with the milling function according to claim 1, it is characterized in that: anterior angle is 8 °, relief angle is 10 °.