CN1151441A - Piston processing method - Google Patents
Piston processing method Download PDFInfo
- Publication number
- CN1151441A CN1151441A CN 95121112 CN95121112A CN1151441A CN 1151441 A CN1151441 A CN 1151441A CN 95121112 CN95121112 CN 95121112 CN 95121112 A CN95121112 A CN 95121112A CN 1151441 A CN1151441 A CN 1151441A
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- China
- Prior art keywords
- piston
- thermalization
- hours
- cylinder
- skirt
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- 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.)
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A thermification treatment method for piston includes such steps as putting piston in thermifying furnace with thermifying liquid, heating to 200 deg.C, adding thermifying agent to the furnace, keeping 200 deg.C constant for 2 hr, heating up to 240 deg.C within 2 hr, then keeping the temp. constant for 14 hr, heating up to 260 deg.C within 2 hr, then keeping the temp. constant for 6 hr, and then turn off power so it is cooled to ordinary temp. The treated piston has decreased linear expansion and friction coefficients and increased plasticity, so small cold fit tolerance between cylidner and piston can be designed, resulting in better guide performance and longer sealing ageing of combustion chamber.
Description
The present invention relates to piston processing method.Especially the thermalization treatment process of piston.
One of important symbol of engine scientific-technical progress is to strengthen steering capability, the prolongation combustion chamber sealing timeliness of piston, the tolerance clearance of promptly dwindling piston and cylinder.Since engine came out, the mankind had experienced the arduous effort in century more than, the tolerance clearance of piston and cylinder have been narrowed down to: petrol motor 0.02mm; Diesel engine 0.15mm.But be difficult to dwindle again.This one of the main reasons wherein is the physicals that material itself exists, and promptly hot expansibility, frictional property the subject of knowledge and the object of knowledge are extremely.If the tolerance clearance of piston and cylinder is too little, then easy scuffing of cylinder bore.Therefore, how to improve the physicals of piston, reduce its linear expansivity, frictional coefficient, increase plasticity-, will produce very significant effects the steering capability that strengthens piston, the sealing timeliness that prolongs the combustion chamber.
Therefore, the present invention's purpose is to provide a kind of piston processing method, by improving the material of piston, reduce its linear expansivity, frictional coefficient, increase plasticity-, make the cold tolerance on fit of cylinder bore and skirt of piston major diameter: the absolute tolerance of petrol motor is 0-0.05mm; Diesel engine is 0.10-0.05mm, thereby strengthens the steering capability of piston, the sealing timeliness that prolongs the combustion chamber.
The present invention's piston processing method is achieved in that will determine that at first the piston that uses carries out thermalization and handles.This thermalization is handled and comprised: this piston is inserted the thermalization stove of being furnished with thermalization liquid, and (volume is 0.5m
3) in, and energising heats up, begin to be warming up to 200 ℃ from room temperature through two hours, get oxalic acid 10-20g, caoxalate 15-30g, manganous sulfate 10-20g, lanthanum trioxide 15-20g, Guanidinium nitrate 10-20g, thiophosphoric anhydride 8-20g, neodymium 15-40g, lanthanum 20-60g, cerium 15-40g, yttrium 20g, scandium 20g, molybdenum 15g, mix stirring and become the thermalization agent, drop into again in the thermalization stove with oil dilution.After dropping into the thermalization agent in the stove, 200 ℃ of constant temperature 2 hours was warming up to 240 ℃, constant temperature 14 hours again in two hours; In two hours, be warming up to 260 ℃ again, constant temperature 6 hours.The nature that cuts off the power supply is at last reduced to room temperature.Take out piston then, according to the size of design, cylinder is carried out boring, mill or preparation cylinder, make the cold tolerance on fit of cylinder bore and skirt of piston major diameter: the absolute tolerance of petrol motor is 0-0.05mm; Diesel engine is 0.10-0.05mm.Under dustless condition, assemble.
The piston that adopts this thermalization agent thermalization to handle, linear expansivity, frictional coefficient reduce, and plasticity-increases, wear-resistant, antifatigue, high temperature resistant, corrosion-resistant.Because above-mentioned variation has taken place for the physicals of piston, therefore, in cylinder bore and the cold tolerance on fit of skirt of piston major diameter: the absolute tolerance of petrol motor is 0-0.05mm; Diesel engine is under the situation of 0.10-0.05mm, and piston can carry out normal to-and-fro movement, not scuffing of cylinder bore.Thereby realize the best steering capability of piston, the sealing timeliness that prolongs the combustion chamber, finally make the dynamic property of engine good order and condition, economy is able to relative prolongation with emission behavior.
Claims (4)
1, a kind of piston adding method.To determine that at first the piston that uses carries out thermalization and handles.It is characterized in that: this thermalization is handled and comprised: this piston is inserted the thermalization stove of being furnished with thermalization liquid, and (volume is 0.5m
3), and energising heats up, begin to be warming up to 200 ℃ from room temperature through two hours, get oxalic acid 10-20g, caoxalate 15-30g, manganous sulfate 10-20g, lanthanum trioxide 15-20g, pin sour guanidine 10-20g, thiophosphoric anhydride 8-20g, neodymium 15-40g, lanthanum 20-60g, cerium 15-40g, yttrium 20g, scandium 20, molybdenum 15g, mix stirring and become the thermalization agent, drop into again in this thermalization stove with oil dilution.After dropping into the thermalization agent in the stove, constant temperature is 2 hours in the time of 200 ℃, is warming up to 240 ℃ again in two hours, constant temperature 14 hours; In two hours, be warming up to 260 ℃ again, constant temperature 6 hours.The nature that cuts off the power supply is at last reduced to room temperature.Take out piston then, cylinder is carried out boring mill or preparation, make the cylinder bore of petrol motor, diesel engine and the cold tolerance on fit of skirt of piston major diameter reach predetermined size respectively.
2, method according to claim 1 is characterized in that described thermalization liquid is No. 32 machinery oil.
3, method according to claim 1 is characterized in that the cold absolute tolerance that cooperates of described gasoline engine cylinder internal diameter and skirt of piston major diameter is 0-0.05mm.
4, method according to claim 1 is characterized in that the cold tolerance that cooperates of described cylinder of diesel engine internal diameter and skirt of piston major diameter is: 0.10-0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95121112 CN1151441A (en) | 1995-12-28 | 1995-12-28 | Piston processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95121112 CN1151441A (en) | 1995-12-28 | 1995-12-28 | Piston processing method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94104473 Division CN1033661C (en) | 1994-05-07 | 1994-05-07 | Piston ring processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1151441A true CN1151441A (en) | 1997-06-11 |
Family
ID=5082406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95121112 Pending CN1151441A (en) | 1995-12-28 | 1995-12-28 | Piston processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151441A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432956B2 (en) | 2004-11-15 | 2008-10-07 | Mediatek Incorporation | Methods and systems for providing images and related devices |
-
1995
- 1995-12-28 CN CN 95121112 patent/CN1151441A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432956B2 (en) | 2004-11-15 | 2008-10-07 | Mediatek Incorporation | Methods and systems for providing images and related devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |