CN201588528U - Bit shank sleeve of rock drill - Google Patents
Bit shank sleeve of rock drill Download PDFInfo
- Publication number
- CN201588528U CN201588528U CN2009202901204U CN200920290120U CN201588528U CN 201588528 U CN201588528 U CN 201588528U CN 2009202901204 U CN2009202901204 U CN 2009202901204U CN 200920290120 U CN200920290120 U CN 200920290120U CN 201588528 U CN201588528 U CN 201588528U
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- CN
- China
- Prior art keywords
- bit shank
- shank sleeve
- shank cover
- rock drill
- hammer drill
- 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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Abstract
The utility model discloses a long-service-life bit shank sleeve of a rock drill, which comprises a bit shank sleeve body, wherein hardening layers are respectively arranged on an inner surface and an outer surface of the bit shank sleeve body. The bit shank sleeve of the rock drill is made of bearing steel GCr15; after the bit shank sleeve is processed through heat treatment technology such as carburizing and quenching and the like, the hardening layer depth satisfying the requirements of the heat treatment technology, the effective hardening depth and the optimum surface and core hardness can be obtained; therefore, the bit shank sleeve achieves good comprehensive mechanical properties such as fatigue strength, ductility, wearing resistance and the like, the abrasion resistance capability of an inner hexagon of the bit shank sleeve is improved greatly, the crack of the bit shank sleeve can be overcome effectively, and the service life of the bit shank sleeve can be further prolonged; and in addition, the bit shank sleeve has the advantages of good fatigue resistance, wearing resistance, little possibility of cracking and long service life.
Description
Technical field
The utility model relates to the parts on a kind of hammer drill, especially is a kind of hammer drill bit shank cover of using on the 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.The bit shank cover is the quick-wear part of hammer drill, be pressed into installation use in the turning set after machining, when using hammer drill to carry out bore operation, the bit shank cover matches with the bit shank of drill steel, and drill steel makes the bit shank cover be subjected to very big impact force under the continuous impact of piston, rotating effect, so the service condition of bit shank cover is very abominable, cause mechanical fatigue easily and cause the interior six side's abrasion conditions of bit shank cover serious, reduce the application life of bit shank cover.The present domestic 20Cr carburizing steel manufacturing of generally adopting, its case hardness, centre hardness and effective case depth that carries out obtaining after carburizing and quenching is handled is not all reached the heat treatment technics requirement, in use for some time, occurring easily rises splits, interior six side's serious wear, and influences the application life of hammer drill.
Summary of the invention
Technical problem to be solved in the utility model has provided that a kind of surface has good abrasion resistance and heart portion has the good comprehensive mechanical and the rational long-life hammer drill bit shank cover of case depth.
For solving the problems of the technologies described above, the technical solution of the utility model is: hammer drill bit shank cover, comprise bit shank cover body, and the inner surface and the external surface of described bit shank cover body are respectively equipped with hardened layer.
The degree of depth of HRC in the described hardened layer 〉=5 parts is 4mm.
The bit shank cover body that described bit shank cover body is made for adopting bearing steel GCr15 material.
Adopt the hammer drill bit shank cover after above-mentioned material is made and handled, improved the comprehensive mechanical performance and the surface abrasion resistance of bit shank cover greatly.
Wherein, the composition of GCr15 such as following table:
| Composition | C | Mn | P | S | Si | Cr |
| Scope (wt%) | 0.9～1.05 | 0.20～0.40 | ≤0.027 | ≤0.020 | 0.15～0.35 | 1.30～1.65 |
The blank that adopts the bearing steel GCr15 material of above-mentioned composition to make, through conventional operation machine-shaping, heat-treat the hammer drill bit shank cover after the PROCESS FOR TREATMENT then, significantly improved the comprehensive mechanical performance such as intensity, fatigue strength and toughness, abrasion resistance of bit shank, the impact force of transmitting when adapting to the hammer drill operation.Through Long-term analysis demonstration and commerical test, the optimization best heat treatment is 920 ℃ of carburizing * 22 hour+quenched in 860 ℃ * 2.5 hours, the bit shank cover toughness that obtain this moment is best, hardened layer, hardened layer and surface, centre hardness the best, and the bit shank cover is the longest application life.
Hammer drill bit shank cover body obtains following heat treatment performance parameter after adopting above-mentioned Technology for Heating Processing:
Case hardness: HRC60-64
Centre hardness: HRC 〉=55
The hammer drill bit shank cover of technique scheme, owing to be after having adopted blank that bearing steel GCr15 makes through the machine moulding, carry out after Technology for Heating Processing such as carburizing and quenching handles, obtain meeting case depth and the effective case depth that heat treatment technics requires, and best surface, centre hardness, make the bit shank cover have comprehensive mechanical performances such as good fatigue strength and toughness, abrasion resistance, increased substantially the antiwear property of six sides in the bit shank cover, effectively overcome the situation that the bit shank cover rises and splits, further improved the application life of bit shank cover.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is further described.
Accompanying drawing is the schematic diagram of a kind of hammer drill bit shank cover of the utility model.
The specific embodiment
As shown in drawings, hammer drill bit shank cover of a kind of long-life of the utility model, comprise bit shank cover body 1, the inner surface and the external surface of bit shank cover body are respectively equipped with hardened layer 2, the bit shank cover body that bit shank cover body is made for adopting bearing steel GCr15 material, after the bit shank cover that bearing steel GCr15 is made in employing is handled through Technology for Heating Processing, to reach best heart portion combination of strength and toughness, make its surfaces externally and internally have hardened layer 2 at bit shank cover body 1, and the degree of depth of HRC in the hardened layer 〉=58 parts is 4mm, the centre hardness of bit shank cover body 1 is controlled at HRC 〉=55, case hardness is controlled at HRC60-64, to improve the hardness and the abrasion resistance on bit shank cover body 1 surface, improve the antiwear property of six sides in the bit shank cover, significantly promoted the application life of bit shank cover.
More than be the application's a specific embodiment, should be understood that these embodiment only be used to the invention is described and be not used in the restriction the invention scope.Should be understood that in addition those skilled in the art can make various changes or modifications the invention after the content of having read the invention instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (3)
1. hammer drill bit shank cover comprises bit shank cover body, it is characterized in that: the inner surface and the external surface of described bit shank cover body are respectively equipped with hardened layer.
2. hammer drill bit shank cover as claimed in claim 1 is characterized in that: the degree of depth of HRC in the described hardened layer 〉=58 parts is 4mm.
3. hammer drill bit shank cover as claimed in claim 1 or 2 is characterized in that: the bit shank cover body that described bit shank cover body is made for adopting bearing steel GCr15 material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202901204U CN201588528U (en) | 2009-12-16 | 2009-12-16 | Bit shank sleeve of rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202901204U CN201588528U (en) | 2009-12-16 | 2009-12-16 | Bit shank sleeve of rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201588528U true CN201588528U (en) | 2010-09-22 |
Family
ID=42748306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202901204U Expired - Fee Related CN201588528U (en) | 2009-12-16 | 2009-12-16 | Bit shank sleeve of rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201588528U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839914A (en) * | 2012-09-04 | 2012-12-26 | 潍坊天瑞重工凿岩机械有限公司 | Intermediate wind pressure high-speed rock drilling machine |
| CN105626107A (en) * | 2016-03-15 | 2016-06-01 | 刘允勇 | Bendable connector |
-
2009
- 2009-12-16 CN CN2009202901204U patent/CN201588528U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839914A (en) * | 2012-09-04 | 2012-12-26 | 潍坊天瑞重工凿岩机械有限公司 | Intermediate wind pressure high-speed rock drilling machine |
| CN102839914B (en) * | 2012-09-04 | 2013-08-14 | 潍坊天瑞重工凿岩机械有限公司 | Intermediate wind pressure high-speed rock drilling machine |
| CN105626107A (en) * | 2016-03-15 | 2016-06-01 | 刘允勇 | Bendable connector |
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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: 20121227 |
|
| 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: 261061 WEIFANG, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121227 Address after: 261061 high tech Zone, Weifang City, Shandong Province, Qing Qing Street, No. 13159 high tech building, room 1309 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: Bit shank sleeve of rock drill 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 |
Granted publication date: 20100922 Termination date: 20171216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |