CN201588551U - Low wind pressure down-the-hole drill bit - Google Patents
Low wind pressure down-the-hole drill bit Download PDFInfo
- Publication number
- CN201588551U CN201588551U CN2009202901134U CN200920290113U CN201588551U CN 201588551 U CN201588551 U CN 201588551U CN 2009202901134 U CN2009202901134 U CN 2009202901134U CN 200920290113 U CN200920290113 U CN 200920290113U CN 201588551 U CN201588551 U CN 201588551U
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- drill bit
- hole
- drill body
- inner air
- wind pressure
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Abstract
The utility model discloses a low wind pressure down-the-hole drill bit and belongs to a drilling tool used for mine engineering. The drill bit comprises a drill bit body, a powder discharge slot that is arranged on the peripheral surface of the head end of the drill bit body, and at least two vents that are communicated with the powder discharge slot and an inner air passage, wherein the drill bit body comprises the inner air passage that is arranged inside the drill bit body; and the peripheral surface of the drill bit body and the inner surface of the inner air passage are both provided with a hardened wear-resistant layer. The down-the-hole drill bit solves the technical problem that abrasion and crack phenomena easily happen to a low wind pressure down-the-hole bit and therefore the service life thereof is short. The down-the-hole drill bit of the utility model is reasonable in structure, superior in performance, long in service life and widely applied to mine drilling operation.
Description
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 low pneumatic down-the-hole bit.
Background technology
Drill bit is the instrument that rig is used for bore operation, and the compressed air that low blast hidden hole drilling adopts 0.4～0.63MPa promotes reciprocating motion of the pistons as power.Low pneumatic down-the-hole bit generally adopts the drilling tool special-purpose steel to form through quenching, tempering common process Processing of Preparation, as the low blast drill bit that adopts drilling tool special-purpose steel FF-710 steel to form fully, because the service condition very severe 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, not wear-resisting and initial failure 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 low pneumatic down-the-hole bit is provided, occurs wearing and tearing, phenomenon of rupture easily, the technical problem that application life is short to solve low pneumatic down-the-hole bit.
For solving the problems of the technologies described above, the technical solution of the utility model is: low pneumatic down-the-hole 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 is positioned at the outer surface of drill body head end; Article at least two, wind hole, described wind hole is communicated with described sludge groove and inner air flue; The inner surface in the outer peripheral face of described drill body and inner air flue and wind hole is equipped with hardened wear-resistant layer.
As a kind of improvement, it is the drill body that 20CrMnMo makes that described drill body adopts material.
As further improvement, described hardened wear-resistant layer is a carburized layer.
Owing to adopted technique scheme, the beneficial effects of the utility model are: owing to be all to have adopted the case hardening treatment process at the outer peripheral face of drill body and the inner surface in inner air flue and wind hole, make on the inner surface in the outer peripheral face of drill body and inner air flue and wind hole and all be covered with the hardened wear-resistant layer that one deck can improve the drill bit anti-fatigue performance, improved the compressive stress of drill body, thereby reduced the fatigue damage of drill bit, avoid drill bit early fracture phenomenon, prolonged the application life of drill bit.Drill body is prepared into for the 20CrMnMo steel, and its heart portion has good toughness, adopts hardening process again, improve the hardness of bit face hardened layer, improve the anti-fatigue performance of drill bit, thereby improved abrasion resistance and reduced the fracture of drill bit, prolonged the application life of drill bit.
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, carburized layer, 3, inner air flue, 4, the wind hole.
The specific embodiment
As shown in drawings, a kind of low pneumatic down-the-hole bit comprises drill body 1, is provided with inner air flue 3 in the inside of drill body 1, in at least two wind holes 4 that drill body 1 head end surface is provided with carbide button and is communicated with inner air flue 3, wind hole 4 is communicated with the sludge groove of drill body 1 head end outer surface; Be equipped with one deck carburized layer 2 at the outer peripheral face of drill body 1 and the inner surface in inner air flue 3 and wind hole 4, carburized layer 2 can produce compressive stress, thereby has improved the drill bit anti-fatigue performance, has reduced the fracture of drill bit, has prolonged the application life of drill bit.It is that material is made drill body that drill body 1 can adopt the 20CrMnMo steel, so that drill bit has good anti-fatigue performance, drill body 1 carries out Carburization Treatment, form one deck carburized layer 2, carry out temper then, to obtain comentation hardening layer with good rigid structure, reach and improve drill bit hardness, make the drill bit top layer have the purpose of high rigidity and abrasion resistance, bit face produces compressive stress, improve the anti-fatigue performance 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 (3)
1. low pneumatic down-the-hole bit comprises drill body, and described drill body comprises
Inner air flue, described inner air flue is arranged at described drill body inside;
Sludge groove, described sludge groove is positioned at the outer surface of drill body head end;
Article at least two, wind hole, described wind hole is communicated with described sludge groove and inner air flue; It is characterized in that:
The inner surface in the outer peripheral face of described drill body and inner air flue and wind hole is equipped with hardened wear-resistant layer.
2. low pneumatic down-the-hole bit as claimed in claim 1 is characterized in that: described drill body is adopted as the drill body that material 20CrMnMo makes.
3. low pneumatic down-the-hole bit as claimed in claim 2 is characterized in that: described hardened wear-resistant layer is a carburized layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202901134U CN201588551U (en) | 2009-12-16 | 2009-12-16 | Low wind pressure down-the-hole drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202901134U CN201588551U (en) | 2009-12-16 | 2009-12-16 | Low wind pressure down-the-hole drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201588551U true CN201588551U (en) | 2010-09-22 |
Family
ID=42748329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202901134U Expired - Fee Related CN201588551U (en) | 2009-12-16 | 2009-12-16 | Low wind pressure down-the-hole drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201588551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320988A (en) * | 2016-10-08 | 2017-01-11 | 郑州神利达钻采设备有限公司 | Down-the-hole drill bit with good continuous cooling and slagging effects |
-
2009
- 2009-12-16 CN CN2009202901134U patent/CN201588551U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320988A (en) * | 2016-10-08 | 2017-01-11 | 郑州神利达钻采设备有限公司 | Down-the-hole drill bit with good continuous cooling and slagging effects |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Low wind pressure down-the-hole drill bit Effective date of registration: 20150104 Granted publication date: 20100922 Pledgee: Bank of Communications Ltd Weifang branch Pledgor: Weifang Tian Rui heavy rock drilling machinery Co., Ltd., Li Yongsheng Registration number: 2015990000002 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20160121 Granted publication date: 20100922 Pledgee: Bank of Communications Ltd Weifang branch Pledgor: Weifang Tian Rui heavy rock drilling machinery Co., Ltd., Li Yongsheng Registration number: 2015990000002 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20171216 |