CN202555873U

CN202555873U - Internal cooling twist drill

Info

Publication number: CN202555873U
Application number: CN2012201393837U
Authority: CN
Inventors: 王玉明; 曾显胜
Original assignee: DALIAN HENGRUI PRECISION MACHINERY Co Ltd
Current assignee: DALIAN HENGRUI PRECISION MACHINERY Co Ltd
Priority date: 2012-04-05
Filing date: 2012-04-05
Publication date: 2012-11-28
Anticipated expiration: 2022-04-05

Abstract

Disclosed is an internal cooling twist drill, comprising a drillstock and a drill bit body arranged at the front end of the drillstock. The drill bit body is in the shape of an inverted cone, the front part of the drill bit body is a small end, and the front end of the drill bit body is a conical vertical face and is provided with a first cutting edge part and a second cutting edge part; the drill bit body is uniformly provided with a plurality of helical cutting edge strips with a set angle and a concave helical chip-removing slot is formed between every two adjacent helical cutting edge strips; and the central part of the drill bit body is provided with a first internal cooling hole and a second internal cooling hole which are respectively symmetrical around the center. According to the utility model, an internal cooling process is added and cooling liquid can spray onto a tool nose at any time so that the processing temperature does not rise, the cutting effect is stable, the service life of tools is greatly extended, and the consumption rate is reduced.

Description

Cold fluted drill in a kind of

Technical field

The utility model belongs to the drill bit field, relate to a kind of in cold fluted drill.

Background technology

At present, have many kinds to bore the drill bit that stainless steel is used on the market, the various model drill bits of traditional band regular screw threads can satisfy use.

, in the production practices process, use on a large scale along with in producing, find that gradually former technology has many deficiencies, former deficiency: do not have inner cooling, be easy to generate high temperature during deep hole processing, sticking bits can cause drill bit to fracture when serious.

The utility model content

The purpose of the utility model provides a kind of twolip band fluted drill, and this drill bit makes cutting edge sharp through the special flute profile of exploitation, keeps the intensity of point of a knife simultaneously, has reduced the loss of drill bit greatly.

The technical scheme that adopts is:

Cold fluted drill in a kind of comprises drillstock and bit body, and bit body is installed in the drillstock front end;

Bit body is back taper, and the bit body front portion is a small end, and the bit body front end is the taper facade, and offers first blade part and second blade part respectively at the bit body front end;

Evenly be laid with the helical land that multi-ribbon has set angle on the bit body, form the spill helical flute between per two adjacent helical lands;

Offer with the center symmetry respectively in bit body inside that in the cold hole 7 and second cold hole in first;

Offer first domatic, second domatic, the 3rd domatic and the 4th domatic respectively with the center symmetry at bit body middle part;

Become hexagonal angle between first blade part of above-mentioned bit body front end and second blade part, first domatic and second domatic between at an angle of 90, the 3rd domatic and the 4th domatic between at an angle of 90.

The utility model has the advantages that:

The utility model has increased inner cooling link, and cooling fluid can be sprayed onto point of a knife at any time, and processing temperature can not risen, and cutting effect is stable, has so also prolonged the life-span of cutter greatly, and consumption rate reduces.

Description of drawings

Fig. 1 is the overall structure sketch map of the utility model.

Fig. 2 is the band angle overall structure sketch map of the utility model

Fig. 3 is the schematic cross-section of the bit part of the utility model.

The specific embodiment

Cold fluted drill in a kind of comprises drillstock 1 and bit body 2, and bit body 2 is installed in drillstock 1 front end;

Bit body 2 is back taper, and bit body 2 front portions are small end, and bit body 2 front ends are the taper facade, and offer first blade part 3 and second blade part 4 respectively at bit body 2 front ends;

Evenly being laid with multi-ribbon on the bit body 2 has the helical land 5 of set angle, forms spill helical flute 6 between per two adjacent helical lands 5;

Offer with the center symmetry respectively in bit body 2 inside that in the cold hole 7 and second cold hole 8 in first;

Offer the first domatic 9, second the domatic the 10, the 3rd domatic 11 and the 4th domatic 12 with the center symmetry respectively at bit body 2 middle parts;

Become hexagonal angle between first blade part 3 of above-mentioned bit body 2 front ends and second blade part 4, between first domatic 9 and second domatic 10 at an angle of 90, between the the 3rd domatic 11 and the 4th domatic 12 at an angle of 90.

Claims

1. cold fluted drill in a kind comprises drillstock (1) and bit body (2), and bit body (2) is installed in drillstock (1) front end, it is characterized in that:

Bit body (2) is back taper, and bit body (2) front portion is a small end, and bit body (2) front end is the taper facade, and offers first blade part (3) and second blade part (4) respectively at bit body (2) front end;

Evenly being laid with multi-ribbon on the bit body (2) has the helical land (5) of set angle, forms spill helical flute (6) between per two adjacent helical lands (5);

Offer with the center symmetry respectively in bit body (2) inside in first in cold hole (7) and second cold hole (8);

Offer first domatic (9), second the domatic the 10, the 3rd domatic (11) and the 4th domatic (12) with the center symmetry respectively at bit body (2) middle part.

2. according to claim 1 a kind of in cold fluted drill; It is characterized in that: become hexagonal angle between first blade part (3) of described bit body (2) front end and second blade part (4); Between first domatic (9) and second domatic (10) at an angle of 90, between the 3rd domatic (11) and the 4th domatic (12) at an angle of 90.