CN201588527U - Spiral rod for rock drills - Google Patents
Spiral rod for rock drills Download PDFInfo
- Publication number
- CN201588527U CN201588527U CN2009202901149U CN200920290114U CN201588527U CN 201588527 U CN201588527 U CN 201588527U CN 2009202901149 U CN2009202901149 U CN 2009202901149U CN 200920290114 U CN200920290114 U CN 200920290114U CN 201588527 U CN201588527 U CN 201588527U
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- CN
- China
- Prior art keywords
- claw
- rifle bar
- bar
- hammer drill
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Drilling Tools (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The utility model discloses a spiral rod for rock drill, which belongs to the accessory of rock drill, and comprises a rod part with a spiral groove and a claw part treated by thermal refining. The rod part and the claw part are fixed together, and the outer surfaces of the rod part and the claw part are both provided with wear-resistant layers. The utility model solves the technical problems that the claw part of the spiral rod of the rock drill is prone to fracture, and the service life is short. The utility model has the advantages of reasonable structure, superior performance and long service life, and can be widely applied to production operation of the rock drills.
Description
Technical field
The utility model relates to a kind of accessory of hammer drill, relates in particular to a kind of rifle bar that is used for hammer drill.
Background technology
Hammer drill is a kind of power tool that is used for rock drilling boring, and its operating principle is to be power with compressed air, move back and forth by the aggressive valve control piston, and during stroke, piston impact drilling tool cutter crushed rocks; During backhaul, piston drives the certain angle of drilling tool revolution.Continuous impact, revolution make drilling tool dig out circular big gun hole on rock, realize boring.When using hammer drill to carry out bore operation, rifle bar bears sliding friction repeatedly, the effect of powerful extruding and torsional moment, so the service condition of rifle bar is very abominable, cause mechanical fatigue easily and cause the claw of rifle bar to rupture, reduce the application life of rifle bar.Rifle bar ubiquity high strength, high rigidity, the abrasion resistance height of domestic production at present, but the problem of claw easy fracture have had a strong impact on application life of rifle bar.
The utility model content
Technical problem to be solved in the utility model is: a kind of rifle bar that is used for hammer drill is provided, easily ruptures the technical problem that application life is short to solve hammer drill rifle bar claw.
For solving the problems of the technologies described above, the technical solution of the utility model is: the rifle bar that is used for hammer drill, comprise the claw that has spiral fluted bar portion and process modifier treatment, described bar portion and claw are fixed together, and the external surface of described bar portion and claw is equipped with wearing layer.
As a kind of improvement, it is the rifle bar that 20CrMnMo makes that described rifle bar adopts material.
As further improvement, described wearing layer is a carburized layer.
As further improvement, described case depth is 1.5～2.0mm.
Owing to adopted technique scheme, the beneficial effects of the utility model are: because hammer drill rifle bar blank is made by the 20CrMnMo material, through conventional machining processes, after carrying out carburizing, quenching heat treatment PROCESS FOR TREATMENT then, carburized (case) depth is darker than 0.6 conventional～0.9mm, obtained the high hammer drill rifle bar of high strength, high rigidity and abrasion resistance, born sliding friction and powerful nip load in the course of the work repeatedly to adapt to the hammer drill rifle bar; Claw to rifle bar carries out modifier treatment technology again, make claw have good strength and toughness and rationally mate, with guarantee its intensity rationally, good toughness, the claw hammer drill rifle bar of easy fracture, long service life not.
Obtain following heat treatment performance parameter through hammer drill rifle bar after the Technology for Heating Processing:
Carburized (case) depth: 1.5～2.0mm;
Case hardness: HRC60-64;
Carbide grade :≤3 grades;
Martensite and retained austenite rank :≤3 grades.
The hammer drill rifle bar of technique scheme, the rifle bar blank that employing material 20CrMnMo makes is after over carburizing, quenching, tempering and toughness are handled, case hardness is than conventional HRC55-60 height, make bar portion hardness and abrasion resistance all be improved, and claw has high strength and obdurability, like this, make rifle bar have comprehensive mechanical performances such as good fatigue strength and toughness, abrasion resistance, effectively prevent the problem of rifle bar claw easy fracture, further improved the application life of rifle bar.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the sectional structure schematic diagram of claw among Fig. 1;
Among the figure: 1, claw, 2, bar portion, 3, carburized layer.
The specific embodiment
As shown in drawings, a kind of rifle bar that is used for hammer drill comprises the claw 1 that has spiral fluted bar portion 2 and process modifier treatment, and described bar portion 2 and claw 1 are fixed together, and the external surface of described bar portion 2 and claw 1 is equipped with wearing layer.
The blank that is used for the rifle bar of hammer drill is made by material 20CrMnMo, through conventional machining processes, after carrying out carburizing, quenching heat treatment PROCESS FOR TREATMENT then, carburized layer 3 degree of depth as wearing layer reach 1.5～2.0mm, obtained the high hammer drill rifle bar of high strength, high rigidity and abrasion resistance, case hardness reaches HRC60-64, bears sliding friction and powerful nip load in the course of the work repeatedly to adapt to the hammer drill rifle bar; Claw 1 to rifle bar carries out tempering heat treatment process again, make claw 1 have good strength and toughness and rationally mate, with guarantee its intensity rationally, good toughness, the claw 1 hammer drill rifle bar of easy fracture, long service life not.
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 (4)
1. the rifle bar that is used for hammer drill comprises the claw that has spiral fluted bar portion and process modifier treatment, and described bar portion and claw are fixed together, and it is characterized in that:
The external surface of described bar portion and claw is equipped with wearing layer.
2. the rifle bar that is used for hammer drill as claimed in claim 1 is characterized in that: it is the rifle bar that 20CrMnMo makes that described rifle bar adopts material.
3. the rifle bar that is used for hammer drill as claimed in claim 2 is characterized in that: described wearing layer is a carburized layer.
4. the rifle bar that is used for hammer drill as claimed in claim 3 is characterized in that: described case depth is 1.5～2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202901149U CN201588527U (en) | 2009-12-16 | 2009-12-16 | Spiral rod for rock drills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202901149U CN201588527U (en) | 2009-12-16 | 2009-12-16 | Spiral rod for rock drills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201588527U true CN201588527U (en) | 2010-09-22 |
Family
ID=42748305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202901149U Expired - Fee Related CN201588527U (en) | 2009-12-16 | 2009-12-16 | Spiral rod for rock drills |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201588527U (en) |
-
2009
- 2009-12-16 CN CN2009202901149U patent/CN201588527U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WEIFANG TIANRUI HEAVY INDUSTRY DRILLING MACHINERY Free format text: FORMER OWNER: LI YONGSHENG Effective date: 20121018 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 261041 WEIFANG, SHANDONG PROVINCE TO: 261205 WEIFANG, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121018 Address after: 261205, Shandong province Weifang health Street high tech two comprehensive bonded area Patentee after: Weifang Tianrui Heavy Industry Drillong Machinery Co., Ltd. Address before: Baotong Street Industrial Park in Shandong province 261041 dealer in Weifang city Kuiwei District Weifang Zhongrui Engineering Machinery Co. Ltd. Patentee before: Li Yongsheng |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Spiral rod for rock drills 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 |