CN102102373B - Manufacturing process of wear-resistant raking tooth for railway sieve cleaner - Google Patents
Manufacturing process of wear-resistant raking tooth for railway sieve cleaner Download PDFInfo
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- CN102102373B CN102102373B CN200910254402.3A CN200910254402A CN102102373B CN 102102373 B CN102102373 B CN 102102373B CN 200910254402 A CN200910254402 A CN 200910254402A CN 102102373 B CN102102373 B CN 102102373B
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- hard alloy
- wear
- alloy core
- refractory material
- raking
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Abstract
The invention relates to a wear-resistant raking tooth for a railway sieve cleaner and a manufacturing process thereof. The raking tooth comprises a raking tooth body and a ballast raking end arranged at the front end of the raking tooth body, wherein a wear-resistant hard alloy core is arranged in the ballast raking end and comprises a cylindrical small head exposed to the ballast raking end, a cone-shaped large head cast in the ballast raking end and a positioning pin of the wear-resistant hard alloy core; and the positioning pin is a steel cylindrical rod. The manufacturing process comprises the steps of presetting, molding a wax model, molding a fireproof material model, dewaxing, preheating, melting a film/casting, removing the model and welding. The raking tooth has the advantages of high binding force, high strength, wear resistance, long service life and low cost.
Description
Technical field
The present invention relates to a kind of wear-resisting grilled teeth and manufacture craft thereof, relate in particular to a kind of wear-resistant raking tooth for railway sieve cleaner and manufacture craft thereof.
Background technology
Railway ballast track bed will regularly carry out sorting operation, to ensure the functions such as grating, cleannes, elasticity and the draining of circuit ballast.This sorting operation is completed by various types of screen scarifiers, and wherein the grilled teeth on screen scarifier is to be directly used for excavating and taking off the major part that holds together to transport ballast.
The grilled teeth of existing screen scarifier is mostly to adopt steel to manufacture through techniques such as forging, machining and heat treatments, only will scrap because may wear to limit less than 10 kilometers the application life of grilled teeth at present, and therefore use cost is very high.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of wear-resistant raking tooth for railway sieve cleaner and manufacture craft thereof, to overcome the defect existing in prior art.
Technical scheme of the present invention is:
A kind of wear-resistant raking tooth for railway sieve cleaner, comprise grilled teeth body and the end that is cut of taking off that is arranged on grilled teeth body front end, its special character is: described in take off in quarrel end and be provided with wearable hard alloy core, wearable hard alloy core comprises and is exposed to the major part of microcephaly's castingin of taking off quarrel end in taking off quarrel end and the alignment pin of wearable hard alloy core, described microcephaly is cylindric, described major part is circular cone shape, and described alignment pin is steel cylindrical bar.
Above-mentioned wearable hard alloy core is that hardness reaches HRA80-85, flexural strength>=2100N/mm
2alloy.
A manufacture craft for wear-resistant raking tooth for railway sieve cleaner, its special character is to comprise the steps:
1) preset: to prepare casting pattern according to the shape of taking off quarrel end, make wearable hard alloy core and alignment pin, alignment pin is mechanically fixed in the groove of wearable hard alloy core large end face, then wearable hard alloy core is fixed on to correct position in casting pattern;
2) make cured type: inject cured liquid wearable hard alloy core is wrapped in to cured liquid, cooling forms cured type;
3) make refractory material model: form refractory material model to the outer sprayable refractory of cured type;
4) dewaxing: by refractory material model heating, make be curedly fused into cured liquid and flow out from refractory material model;
5) preheating: heating refractory material model to 850 DEG C～900 DEG C;
6) melt film/casting: steel-making water, pours into molten steel in refractory material model;
7) remove model: cooling naturally, refractory material model is destroyed, take out workpiece and take off quarrel end;
8) welding: will take off quarrel end and weld together with grilled teeth body, and form wear-resisting grilled teeth part.
Technique effect of the present invention is:
1, adhesion is strong.After the difference of two kinds of wire expansion factors of technology utilization of the present invention and founding, the molten feature of oozing altogether mutually of metal interface makes it have stronger adhesion, more firm compared with normal temperature castingin and brazing.
2, intensity is high, wear-resisting.The present invention is provided with wearable hard alloy core taking off in quarrel end, makes the present invention in the time of operation, because wear-resisting tooth self has very high intensity and very strong anti-wear performance, the rate of wear of the present invention is declined to a great extent.
3, the life-span is long, cost is low.Because the present invention self has very strong abrasion resistance, therefore make the replacement cycle greatly extend, naturally play the effect reducing costs.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Reference numeral is as follows: 1-grilled teeth body, and 2-wearable hard alloy core, 3-takes off quarrel end, 4-connecting hole, 21-microcephaly, 22-major part, 23-alignment pin, 24-weld seam.
Detailed description of the invention
Referring to Fig. 1, the present invention adopts a kind of new material to utilize new technology, and bi-material has once been cast through preset, preheating and fusible pattern.Become a kind of wear-resisting grilled teeth of composite alloy.
Grilled teeth body of the present invention 1 its upper end take off quarrel end the heart portion castingin wearable hard alloy core 2, its material hardness reaches HRA80-85, flexural strength>=2100N/mm
2, can adopt tungsten-cobalt alloy; Be applicable to wear-resisting and can resist the cleaning operating mode that little energy repeatedly impacts.
The alleged grilled teeth of the present invention, has cast be cut end 3 and the grilled teeth body 1 taken off of low-alloy wear-resistant steel material in 2 outsourcings of above-mentioned wearable hard alloy core, make its performance meet instructions for use through special thermal treatment technique.
The present invention adopts preset, preheating full form casting process, utilizes the molten feature of oozing altogether mutually of metal interface after the difference of two kinds of wire expansion factors and founding to make it have stronger adhesion, more superior compared with normal temperature castingin and brazing.
1) preset: to prepare casting pattern according to the shape of taking off quarrel end, make wearable hard alloy core and alignment pin, alignment pin is mechanically fixed in the groove of wearable hard alloy core large end face, then wearable hard alloy core is fixed on to correct position in casting pattern;
2) make cured type: inject cured liquid wearable hard alloy core is wrapped in to cured liquid, cooling forms cured type;
3) make refractory material shell: form shell to the outer sprayable refractory of cured type, make it wrap cured type; Wearable hard alloy core is stayed in the shell of refractory material formation simultaneously;
4) dewaxing: by refractory material shell heating, make be curedly fused into cured liquid and flow out from refractory material shell;
5) preheating: heating refractory material shell to 850 DEG C～900 DEG C, wearable hard alloy is also heated to uniform temp thereupon simultaneously;
5) melt film: steel-making water, molten steel is poured in the shell of refractory material formation, thereby wearable hard alloy core is wrapped in molten steel;
6) after cooling, the shell that refractory material is formed is destroyed, and the workpiece having taken out takes off quarrel end 3;
7) will take off quarrel end 3 and weld together at weld seam 24 places with grilled teeth body 1, polish off the exposed parts of alignment pin, make wear-resisting grilled teeth.
The alleged production technology of the present invention also can be used for the production of similar tooth on shield machine, highway milling machine.Can improve 3-4 application life doubly.
Claims (1)
1. make the manufacture craft of wear-resistant raking tooth for railway sieve cleaner for one kind, the wear-resisting grilled teeth of made comprises grilled teeth body (1) and is arranged on the end (3) that is cut of taking off of grilled teeth body (1) front end, described taking off in quarrel end (3) is provided with wearable hard alloy core (2), wearable hard alloy core (2) comprises and is exposed to the microcephaly (21) that taking off quarrel end (3), the major part (22) of castingin in taking off quarrel end (3) and the alignment pin (23) of wearable hard alloy core (2), described microcephaly is cylindric, described major part is circular cone shape, described alignment pin (23) is steel cylindrical bar, it is characterized in that, manufacture craft comprises the steps:
1) preset: to prepare casting pattern according to the shape of taking off quarrel end, make wearable hard alloy core and alignment pin, alignment pin is mechanically fixed in the groove of wearable hard alloy core large end face, then wearable hard alloy core is fixed on to correct position in casting pattern;
2) make cured type: inject cured liquid wearable hard alloy core is wrapped in to cured liquid, cooling forms cured type;
3) make refractory material model: form refractory material model to the outer sprayable refractory of cured type;
4) dewaxing: by refractory material model heating, make be curedly fused into cured liquid and flow out from refractory material model;
5) preheating: heating refractory material model to 850 DEG C～900 DEG C;
6) melt film/casting: steel-making water, pours into molten steel in refractory material model;
7) remove model: cooling naturally, refractory material model is destroyed, take out workpiece and take off quarrel end (3);
8) welding: will take off quarrel end (3) and weld together with grilled teeth body (1), and form wear-resisting grilled teeth part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910254402.3A CN102102373B (en) | 2009-12-18 | 2009-12-18 | Manufacturing process of wear-resistant raking tooth for railway sieve cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910254402.3A CN102102373B (en) | 2009-12-18 | 2009-12-18 | Manufacturing process of wear-resistant raking tooth for railway sieve cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102102373A CN102102373A (en) | 2011-06-22 |
| CN102102373B true CN102102373B (en) | 2014-12-10 |
Family
ID=44155412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910254402.3A Expired - Fee Related CN102102373B (en) | 2009-12-18 | 2009-12-18 | Manufacturing process of wear-resistant raking tooth for railway sieve cleaner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102102373B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001511A (en) * | 2016-07-25 | 2016-10-12 | 帅同林 | Manufacturing method of hard alloy wear-resisting bucket teeth |
| CN106513585B (en) * | 2016-11-22 | 2018-09-25 | 株洲中航动力精密铸造有限公司 | blade comb tooth forming method |
| CN108380850B (en) * | 2018-03-28 | 2020-03-17 | 昆明理工大学 | Ceramic particle multi-scale reinforced metal matrix composite wear-resistant rake tooth head and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3331637A (en) * | 1965-05-07 | 1967-07-18 | Cincinnati Mine Machinery Co | Cutter bits and mounting means therefor |
| US4484783A (en) * | 1982-07-22 | 1984-11-27 | Fansteel Inc. | Retainer and wear sleeve for rotating mining bits |
| CN2040114U (en) * | 1988-12-23 | 1989-06-28 | 铁道部专业设计院机械工程设计研究所 | Railway ballast screening machine |
| US5503463A (en) * | 1994-12-23 | 1996-04-02 | Rogers Tool Works, Inc. | Retainer scheme for cutting tool |
| CN1382869A (en) * | 2001-04-26 | 2002-12-04 | 弗兰茨普拉塞铁路机械工业股份有限公司 | Screen scarifier for screening rail ballast |
| CN201047045Y (en) * | 2007-03-20 | 2008-04-16 | 常州中铁科技有限公司 | Ballast cleaner digging chain rake teeth fixing structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100783100B1 (en) * | 2006-11-17 | 2007-12-07 | 주식회사 티엠시 | Tip for a buchket of an excavator and method for manufacturing the same |
-
2009
- 2009-12-18 CN CN200910254402.3A patent/CN102102373B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3331637A (en) * | 1965-05-07 | 1967-07-18 | Cincinnati Mine Machinery Co | Cutter bits and mounting means therefor |
| US4484783A (en) * | 1982-07-22 | 1984-11-27 | Fansteel Inc. | Retainer and wear sleeve for rotating mining bits |
| CN2040114U (en) * | 1988-12-23 | 1989-06-28 | 铁道部专业设计院机械工程设计研究所 | Railway ballast screening machine |
| US5503463A (en) * | 1994-12-23 | 1996-04-02 | Rogers Tool Works, Inc. | Retainer scheme for cutting tool |
| CN1382869A (en) * | 2001-04-26 | 2002-12-04 | 弗兰茨普拉塞铁路机械工业股份有限公司 | Screen scarifier for screening rail ballast |
| CN201047045Y (en) * | 2007-03-20 | 2008-04-16 | 常州中铁科技有限公司 | Ballast cleaner digging chain rake teeth fixing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102102373A (en) | 2011-06-22 |
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