CN201588549U

CN201588549U - High wind pressure drill bit

Info

Publication number: CN201588549U
Application number: CN2009202901399U
Authority: CN
Inventors: 李保顺; 何小宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-16
Filing date: 2009-12-16
Publication date: 2010-09-22
Anticipated expiration: 2019-12-16

Abstract

The utility model discloses a high wind pressure drill bit, belonging to a drilling tool used for mine engineering. The high wind pressure drill bit comprises a drill bit body and a powder discharge groove, wherein the drill bit body comprises an internal gas channel which is positioned inside the drill bit body; the powder discharge groove is positioned on the surface at the periphery of the head end of the drill bit body and is communicated with the internal gas channel by an air hole; a large plane at the end of the drill bit body is provided with alloy teeth; and wear-resistant layers are respectively arranged on the peripheral surface of the drill bit body, the internal gas channel and the inner surface of the air hole. The high wind pressure drill bit solves the technical problems that the high wind pressure drill bit easily has the phenomena of abrasion and breakage as well as short service life. The high wind pressure drill bit has reasonable structure, excellent performance and long service life, and can be widely applied to mine drilling operation.

Description

High blast drill bit

Technical field

The utility model relates to the drilling tool that a kind of mine engineering is used, and relates in particular to a kind of high blast drill bit.

Background technology

High blast drill bit is the bore operation instrument that is assemblied on the high blast rock drilling machine, its operating principle is that impactor piston passes to drill bit with blow energy, drill bit carbide button bump scar fractured rock, high pressure exhaust gas by sludge groove with rubble or rock dust tap at the bottom of, continuous impact, gyration realize the fragmentation of rock, reach the purpose of rock drilling boring.Drill bit generally adopts the drilling tool special-purpose steel to form through quenching, tempering common process Processing of Preparation, but service condition very severe because of drill bit, be subjected to the frequent impact of piston and the anti-force and the wearing and tearing of rock, be easy to generate fatigue damage, cause in the construction operation process, drill bit produces fracture, has influenced the application life of drill bit and the efficient of construction.

The utility model content

Technical problem to be solved in the utility model is: a kind of high blast drill bit is provided, occurs wearing and tearing, phenomenon of rupture easily, the technical problem that application life is short to solve the rock drilling machine drill bit.

For solving the problems of the technologies described above, the technical solution of the utility model is: high blast drill bit, comprise drill body, and described drill body comprises inner air flue, described inner air flue is arranged at the inside of described drill body; Sludge groove, described sludge groove are positioned at the outer surface of drill body head end and are communicated with described inner air flue by the wind hole; Big plane, the end of described drill body is provided with carbide button; The inner surface in the outer peripheral face of described drill body and inner air flue and wind hole is equipped with wearing layer.

As a kind of improvement, it is the drill body that low-carbon martensite is made that described drill body adopts material.

As further improvement, it is the drill body that 20CrMnMo makes that described drill body adopts material.

As further improvement, described wearing layer is a nitriding layer.

Owing to adopted technique scheme, the beneficial effects of the utility model are: because the blank of high blast drill bit has adopted low-carbon martensitic steels 20CrMnMo to make, through quenching and tempering machine again, and then after carrying out the nitriding processing, the outer peripheral face of drill body and the inner surface of inner air flue all are covered with nitriding layer, case hardness 〉=HV1000, and centre hardness reaches HRC42-45, like this, make drill bit have comprehensive mechanical performances such as good fatigue strength and toughness, plasticity; Pass through nitrogen treatment, make drill bit have dark nitriding layer, then can be so that bit face has good hardness and abrasion resistance, the fatigue strength and the corrosion resistance of drill bit have further been improved, make drill bit can adapt to the anti-force of frequent impact of piston and rock and wearing and tearing fully and be difficult for producing mechanical fatigue and destroy, prolonged the application life of drill bit greatly.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing is the structural representation of the utility model embodiment;

Among the figure: 1, drill body, 2, nitriding layer, 3, inner air flue, 4, the wind hole, 5, sludge groove, 6, carbide button.

The specific embodiment

As shown in drawings, a kind of high blast drill bit comprises drill body 1, and drill body 1 comprises inner air flue 3, and inner air flue 3 is arranged at the inside of drill body 1; Sludge groove 5, described sludge groove 5 are positioned at the outer surface of drill body 1 head end and are communicated with described inner air flue 3 by wind hole 4; Big plane, the end of described drill body 1 is provided with carbide button 6; The inner surface of the outer peripheral face of drill body 1 and inner air flue 3 is equipped with nitriding layer 2.The material of drill body 1 adopts low-carbon martensitic steels 20CrMnMo, after the drill bit blank adds the modifier treatment of tempering through quenching earlier, to reach best heart portion combination of strength and toughness, and then carry out machine, nitrogen treatment after the machine-shaping, make high blast drill bit, make its surface form nitriding layer 2 at drill bit, nitriding layer 2 case hardnesses 〉=HV1000, improving the hardness and the abrasion resistance of bit face, the centre hardness HRC42-45 of drill bit has improved the fatigue strength and the corrosion resistance of drill bit, thereby reduced the fracture of drill bit, prolonged the application life of drill bit.

The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the present utility model.

Claims

1. high blast drill bit comprises drill body, and described drill body comprises

Inner air flue, described inner air flue is arranged at the inside of described drill body;

Sludge groove, described sludge groove are positioned at the outer surface of drill body head end and are communicated with described inner air flue by the wind hole; It is characterized in that:

Big plane, the end of described drill body is provided with carbide button;

The inner surface in the outer peripheral face of described drill body and inner air flue and wind hole is equipped with wearing layer.

2. high blast drill bit as claimed in claim 1 is characterized in that: it is the drill body that low-carbon martensite is made that described drill body adopts material.

3. high blast drill bit as claimed in claim 2 is characterized in that: it is the drill body that 20CrMnMo makes that described drill body adopts material.

4. high blast drill bit as claimed in claim 2 is characterized in that: described wearing layer is a nitriding layer.