CN202639427U

CN202639427U - Novel drill point structure

Info

Publication number: CN202639427U
Application number: CN 201220200662
Authority: CN
Inventors: 陶嘉莉
Original assignee: BAILI PRECISION KNIFE (NANCHANG) CO LTD
Current assignee: BAILI PRECISION KNIFE (NANCHANG) CO LTD
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2013-01-02
Anticipated expiration: 2022-05-08

Abstract

The utility model discloses a novel drill point structure. The novel drill point structure comprises a blade part and a shank part which is connected with the bottom of the blade part. Two symmetrical swarf outlet channels are spirally formed on the peripheral surface of the blade part with a rotation axis of the blade part as a centre. A spiral edge cutter is arranged on each side of two swarf outlet channels. Depth and/or width of the edge cutter are / is decreased from front end to rear end. According to the novel drill point structure, the depth and / or the width of a big edge cutter are / is used in areas with relative serious abrasions at the front end to improve rigidity and prolong abrasive service life. The depth or the width of a small edge cutter is used at the tail end to avoid an occurrence that because of additional friction, quality of a wall of a hole is reduced, and thereby defects that traditional strong rigidity and the quality of the wall of the hole can not be both considered are overcome, so that not only is the high rigidity maintained, but also the quality of the wall of the hole is improved. The novel drill point structure is novel in design, simple in structure, low in improvement cost and favorable in effects.

Description

The drill point new structure

Technical field

The utility model relates to a kind of drill point new structure, belongs to high-end hard alloy cutter.

Background technology

Being consisted of by blade 1 and the shank 2 that is connected with blade 1 bottom of tradition drill point, centered by the axis of rotation of blade 1, chip discharge ditch 3 in two symmetries of blade 1 outer peripheral face spiralization, this moment, the side of two chip discharge ditches 3 had a spiral limit cutter 4 separately, the dark design of its limit cutter of traditional drill point is initial impartial dark to limit cutter ending from the limit cutter, and the dark size of limit cutter determine the power of rigidity and the quality of hole ancient piece of jade, round, flat and with a hole in its centre quality (the limit cutter dark large, rigidity is weak, the hole wall quality is good, otherwise then rigidity is strong, hole wall quality is poor), therefore when design, both can't lay equal stress on.

Summary of the invention

The purpose of this utility model is: overcome the defective that conventional rigid is strong and the hole wall quality can't be laid equal stress on, a kind of Novel drill needle construction is provided.

The purpose of this utility model realizes by following scheme: reach the shank that is connected with the blade bottom by blade and consist of, centered by the axis of rotation of blade, chip discharge ditch in two symmetries of blade outer peripheral face spiralization, the front side edge of chip discharge ditch forms the limit cutter, the limit cutter degree of depth from leading portion to the rear width from large to small.

Limit described in the utility model cutter width from leading portion to the rear width from large to small.

The utility model is owing to adopting the front dark rear shallow design of limit cutter, namely strengthen the limit cutter at front end and deeply increase the space, back segment with little limit cutter deeply make rigidity unlikely too a little less than, overcome the defective that conventional rigid is strong and the hole wall quality can't be laid equal stress on, both kept the high strength rigidity, can promote the hole wall quality again, and novel in design, simple in structure, improvement cost is low, effective.

Description of drawings

Fig. 1 is the utility model drill point structure schematic diagram;

Fig. 2 is the utility model blade partial enlarged drawing;

Fig. 3 is the dark top view of the utility model limit cutter;

Fig. 4 is the dark gradient schematic diagram of the utility model limit cutter.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

The utility model reaches the shank 2 that is connected with blade 1 bottom by blade 1 and consists of, centered by the axis of rotation of blade 1, chip discharge ditch 3 in two symmetries of blade 1 outer peripheral face spiralization, this moment two chip discharge ditches 3 side have separately a spiral limit cutter 4, the degree of depth of limit cutter 4 and width from leading portion to the rear width from large to small.

Claims

1. drill point new structure, reaching the shank that is connected with the blade bottom by blade consists of, centered by the axis of rotation of blade, chip discharge ditch in two symmetries of blade outer peripheral face spiralization, it is characterized in that: the front side edge of chip discharge ditch forms the limit cutter, the degree of depth of limit cutter from leading portion to rear from large to small.

2. drill point new structure according to claim 1 is characterized in that: the width of limit cutter from leading portion to the rear width from large to small.