CN2155429Y - Pick for coal-winning machine - Google Patents
Pick for coal-winning machine Download PDFInfo
- Publication number
- CN2155429Y CN2155429Y CN 93231125 CN93231125U CN2155429Y CN 2155429 Y CN2155429 Y CN 2155429Y CN 93231125 CN93231125 CN 93231125 CN 93231125 U CN93231125 U CN 93231125U CN 2155429 Y CN2155429 Y CN 2155429Y
- Authority
- CN
- China
- Prior art keywords
- pick
- coal
- wear
- resistant alloy
- alloy layer
- 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 relates to a cutting pick for coal mining machines, comprising a body (1) of the cutting pick and the head (2) of the cutting pick. The utility model is characterized in that a cutting part (3) on the position of the body (1) of the cutting pick are formed into an integral structure, and the basal body of the cutting part (3) is provided with a wearing-resistant alloy layer (5). The utility model has the advantage that the utility model can effectively enhance the service life of the cutting pick.
Description
The utility model relates to the improvement of coal-winning machine with cutter.
Coal winning machine cutting bit commonly used is divided into flat and pick shape two classes, and the pick body is made by special steel (as 30CrMnTi, 30CrMnSi etc.).Wherein, the flat pick embeds the hard-metal insert head at the tooth front end, and pick-like bit goes out the carbide alloy crown in the built-up welding of tooth head.Because the material hardness of pick body is significantly less than the hard-metal insert head, be easy to wearing and tearing.So often occur that carbide alloy system tooth head process goes out, sealing-off and in working angles with the phenomenon of tooth body dialysis, cause pick lower application life.
For addressing the above problem, Patent Office of the People's Republic of China disclosed on January 30th, 1991 a kind of " the knife-edge pick that has wearing layer around the end " (number of patent application is 90209884.5).The architectural feature of this technology is to adopt the method for built-up welding one deck high-abrasive material of burn-oning around the hard-metal insert head, with this abrasion resistance that improves hard-metal insert head and tooth body binding site, prevents the phenomenon that the tooth head is knocked.Facts have proved that this structure can make the life-span of pick improve 1 times.
The purpose of this utility model is to improve the structure of existing pick, the application life of further improving pick.
The coal-winning machine pick that the utility model provides comprises tooth body, tooth head, it is characterized in that being positioned at the cutting portion and the first body of tooth at tooth head place, and a wear-resistant alloy layer is arranged on the matrix of cutting portion.For increasing the adhesion-tight of wear-resistant alloy layer, a transition metal layer is arranged between wear-resistant alloy layer and the matrix.
Consider combination properties such as cutting tip abrasion resistance, intensity, the thickness of above-mentioned wearing layer is chosen as 1～5 millimeter in the utility model.
When above-mentioned technology was applied to pick-like bit, its cutting portion was a pyramid type crown, be positioned at uniform wear-resistant alloy layer on the circular platform type tooth head at crown rear portion and be positioned at wear-resistant alloy layer and matrix between transition metal layer.
As preferred version, in the pick of said structure, wear-resistant alloy layer is the diamondite layer.
Figure of description 1 is a structural representation of the present utility model;
Figure of description 2 is A-A views of accompanying drawing 1;
Figure of description 3 is another kind of structural representations of the present utility model.1-tooth body in above-mentioned accompanying drawing, 2-tooth head, 3-cutting portion, 4-transition metal layer, 5-wear-resistant alloy layer.
As shown in drawings, tooth body of the present utility model (1), its architectural feature of tooth head (2) are same as the prior art, also are divided into flat (as accompanying drawing 1) and pick shape (as accompanying drawing 2) two classes.
The tooth head (2) of flat pick, its cutting portion (3) are by the cutting edge and the near zone that constitute with the integrally formed forward and backward knife face of material with the tooth head.The method of locating to adopt the method for the method of oxygen-acetylene welding or arc welding or plasma spray at cutting portion (3) with a kind of and denticle material invade with effective metal dust surfacing on denticle as transition metal layer (4), then the wear resistant alloy powders surfacing is formed wear-resistant alloy layer (5) at the cutting position of pick.
Because hard alloy layer (5) is under the effect of transition metal layer (4), the cutting portion (3) that is distributed on tooth head (2) is firmly gone up (certainly, so-called cutting portion is not limited to cutting edge, and be meant in the coal mining process on the tooth head (2) will produce the work plane of violent friction with ature of coal), therefore, improve the performance of pick balance abrasion effectively, improved pick application life greatly.
The tooth head (2) of pick-like bit is made up of the Rotary-table two parts that are cone shape cutting portion (3) and are positioned at its rear portion.Characteristics of the present utility model be adopt with the same process of above-mentioned flat pick with transition metal layer (4) and wear-resistant alloy layer (5) on the surfacing equably on the Rotary-table at coniform cutting portion (3) and its rear portion.
Facts have proved that when wear-resistant alloy layer (5) is selected diamondite for use, when surfacing thickness was selected 1～5 millimeter, the result of use of pick was good especially.
The utility model has the advantages that: flat bit can improve 4～10 times service life, and pick-like bit can improve 2～4 times service life.
Claims (5)
1, a kind of coal-winning machine pick comprises tooth body (1), tooth head (2), it is characterized in that being positioned at the cutting portion (3) and tooth head (2) one at tooth head place, and a wear-resistant alloy layer (5) is arranged on the matrix of cutting portion (3).
2, coal-winning machine pick according to claim 1 is characterized in that: a transition metal layer (4) is arranged between wear-resistant alloy layer (5) and matrix.
3, coal-winning machine pick according to claim 1 and 2 is characterized in that: the thickness of wear-resistant alloy layer (5) is 1～5 millimeter.
4, coal-winning machine pick according to claim 1, it is characterized in that: cutting portion (3) is a pyramid type crown, be positioned at uniform wear-resistant alloy layer (5) on the circular platform type tooth head at crown rear portion, transition metal layer (4) is arranged between wear-resistant alloy layer (5) and matrix.
5, coal-winning machine pick according to claim 1 is characterized in that: wear-resistant alloy layer (5) is the diamondite layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93231125 CN2155429Y (en) | 1993-06-09 | 1993-06-09 | Pick for coal-winning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93231125 CN2155429Y (en) | 1993-06-09 | 1993-06-09 | Pick for coal-winning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2155429Y true CN2155429Y (en) | 1994-02-09 |
Family
ID=33807648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93231125 Expired - Fee Related CN2155429Y (en) | 1993-06-09 | 1993-06-09 | Pick for coal-winning machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2155429Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051830C (en) * | 1996-01-20 | 2000-04-26 | 山东矿业学院 | Process for teeth of coal mining machine |
| CN101920442A (en) * | 2010-06-20 | 2010-12-22 | 大丰市中德精锻件有限公司 | Process for coldly extruding, reducing and pressing bit body and hard alloy head |
| CN102678115A (en) * | 2011-03-12 | 2012-09-19 | 刘素华 | Rolling harrowing device |
| CN106703804A (en) * | 2017-03-03 | 2017-05-24 | 胡沿东 | Tool for mining machinery equipment |
-
1993
- 1993-06-09 CN CN 93231125 patent/CN2155429Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051830C (en) * | 1996-01-20 | 2000-04-26 | 山东矿业学院 | Process for teeth of coal mining machine |
| CN101920442A (en) * | 2010-06-20 | 2010-12-22 | 大丰市中德精锻件有限公司 | Process for coldly extruding, reducing and pressing bit body and hard alloy head |
| CN101920442B (en) * | 2010-06-20 | 2011-12-07 | 大丰市中德精锻件有限公司 | Process for coldly extruding, reducing and pressing bit body and hard alloy head |
| CN102678115A (en) * | 2011-03-12 | 2012-09-19 | 刘素华 | Rolling harrowing device |
| CN106703804A (en) * | 2017-03-03 | 2017-05-24 | 胡沿东 | Tool for mining machinery equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |