CN105755269A - Piston ring heat treatment process - Google Patents
Piston ring heat treatment process Download PDFInfo
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- CN105755269A CN105755269A CN201410770155.3A CN201410770155A CN105755269A CN 105755269 A CN105755269 A CN 105755269A CN 201410770155 A CN201410770155 A CN 201410770155A CN 105755269 A CN105755269 A CN 105755269A
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- piston ring
- heating
- temperature
- piston
- quenching
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Abstract
The invention discloses a piston ring heat treatment process which is characterized by including the following steps: 1) for ensuring the quality of piston rings, carrying out actual heating inspection on the interiors of the piston rings, and firstly heating single piston ring to (850+/-10) DEG C on a resistance heater; 2) after heating the piston rings to a specified temperature through resistance heating, taking the piston rings down from electric contacts, putting the piston rings on a platform, and inserting wedges to openings to make gaps increased; 3) quenching: gathering the piston rings after normalizing and the piston rings after resistance heating together, then putting the piston rings together on a clamp dedicated for quenching heating; and 4) piston ring tempering: using the same devices, using the same dedicated fixtures, operating by the same method, at the temperature of 550-600 DEG C, carrying out heat preservation, and then carrying out air cooling to room temperature. The heat treatment process is simple in method, and the heat treatment effect is good.
Description
Technical field
The present invention relates to a kind of piston ring Technology for Heating Processing.
Background technology
Piston ring is for embedding the becket within piston groove, and piston ring is divided into two kinds: compression ring and machine oil ring.Compression ring can be used to the burning mixture that sealing combustion is indoor；Machine oil ring is then used for striking off machine oil unnecessary on cylinder.Piston ring is a kind of metallic elastic ring having and expanding outwardly more greatly deformation, and it is mounted in its corresponding cannelure of section.Reciprocal and the piston ring of rotary motion, relies on gas or the pressure differential of liquid, forms sealing between ring periphery and cylinder and ring and a side of annular groove.Piston ring work under bad environment, so needing to improve its performance by heat treatment.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of piston ring Technology for Heating Processing, and this heat-treatment technology method is simple, and thermal effectiveness is good.
For achieving the above object, the invention provides a kind of piston ring Technology for Heating Processing, it is characterized in that, comprise the steps, 1) in order to ensure the quality of piston ring, its inside is carried out actual heating test, single piston ring first heats on resistance heater (850 scholar 10) ° C, and after cold ring of living is installed on electric contact, be energized about lmin, piston ring temperature gradually rises, in heating process, if temperature is not to rise equably, the temperature of certain is wherein had to rise the fastest, then surely there are casting fault, defect at this, such as sand holes, pore etc.；Piston
Ring temperature gradually rises, until piston ring presents reddish yellow, i.e. reaches set point of temperature.Utilize this characteristic can check the waste product occurred because of casting in advance；
2) piston ring is after being resistively heated to set point of temperature, electric contact take off, and is placed on platform, then makes gap increase with chock insertion opening, it is ensured that has the opening of about 20mm, then pushes down piston ring with foundary weight, prevent warpage, until air cooling is to room temperature.Here, including piston ring normalizing process.
By taking off the foundary weight of chock and pressing on platform, put aside, continue each piston ring is carried out same operational approach production.
3) quenching: by the piston ring after normalizing, the piston ring after resistance heating, be brought together on the fixture being placed on Special quenching heating again.Size at gap-clearance of piston rings is reserved, and the piston ring of concentration blocks smooth up and down, and piston ring is put into middle temperature type resistance furnace together with special mould clamp and carried out heating quenching；
This is to add the product of passed examination through resistance just to carry out middle temperature type resistance furnace heating quenching, is that piston ring heats in batch, and heating-up temperature is (860 ± 10) DEG C, warm after, put into quenching cooling in lO%NaCl aqueous solution, be tempered in time.
4) piston ring tempering: using same equipment, same special mould clamp, same method operates, temperature 550 600 DEG C, and warm rear air cooling is to room temperature.
The invention has the beneficial effects as follows: the heat-treatment technology method of the present invention is simple, and thermal effectiveness is good.
Detailed description of the invention
Technical scheme disclosed by the invention is a kind of piston ring Technology for Heating Processing, it is characterized in that, comprise the steps, 1) in order to ensure the quality of piston ring, its inside is carried out actual heating test, first single piston ring is heated on resistance heater (850 scholar 10) ° C, after cold ring of living is installed on electric contact, energising about lmin, piston ring temperature gradually rises, in heating process, if temperature is not to rise equably, the temperature wherein having certain rises the fastest, then surely have casting fault, defect at this, such as sand holes, pore etc.；Piston
Ring temperature gradually rises, until piston ring presents reddish yellow, i.e. reaches set point of temperature.Utilize this characteristic can check the waste product occurred because of casting in advance；
2) piston ring is after being resistively heated to set point of temperature, electric contact take off, and is placed on platform, then makes gap increase with chock insertion opening, it is ensured that has the opening of about 20mm, then pushes down piston ring with foundary weight, prevent warpage, until air cooling is to room temperature.Here, including piston ring normalizing process.
By taking off the foundary weight of chock and pressing on platform, put aside, continue each piston ring is carried out same operational approach production.
3) quenching: by the piston ring after normalizing, the piston ring after resistance heating, be brought together on the fixture being placed on Special quenching heating again.Size at gap-clearance of piston rings is reserved, and the piston ring of concentration blocks smooth up and down, and piston ring is put into middle temperature type resistance furnace together with special mould clamp and carried out heating quenching；
This is to add the product of passed examination through resistance just to carry out middle temperature type resistance furnace heating quenching, is that piston ring heats in batch, and heating-up temperature is (860 ± 10) DEG C, warm after, put into quenching cooling in lO%NaCl aqueous solution, be tempered in time.
4) piston ring tempering: using same equipment, same special mould clamp, same method operates, temperature 550 600 DEG C, and warm rear air cooling is to room temperature.
The heat-treatment technology method of the present invention is simple, and thermal effectiveness is good.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should be in the protection domain being defined in the patent claims the most on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a piston ring Technology for Heating Processing, it is characterized in that, comprise the steps, 1) in order to ensure the quality of piston ring, its inside is carried out actual heating test, single piston ring first heats on resistance heater (850 scholar 10) ° C, and after cold ring of living is installed on electric contact, be energized about lmin, piston ring temperature gradually rises, in heating process, if temperature is not to rise equably, wherein there is the temperature liter of certain
Obtain the fastest, then surely have casting fault, defect at this, such as sand holes, pore etc.；Piston ring temperature gradually rises, until piston ring presents reddish yellow, i.e. reaches set point of temperature；Utilize this characteristic can check the waste product occurred because of casting in advance；
2) piston ring is after being resistively heated to set point of temperature, electric contact take off, and is placed on platform, then makes gap increase with chock insertion opening, it is ensured that has the opening of about 20mm, then pushes down piston ring with foundary weight, prevent warpage, until air cooling is to room temperature；Here, including piston ring normalizing process；
By taking off the foundary weight of chock and pressing on platform, put aside, continue each piston ring is carried out same operational approach production；
3) quenching: by the piston ring after normalizing, the piston ring after resistance heating, be brought together and be placed on again specially
With on the fixture of Quench heating；Size at gap-clearance of piston rings is reserved, and the piston ring of concentration blocks smooth up and down, and piston ring is put into middle temperature type resistance furnace together with special mould clamp and carried out heating quenching；
This is to add the product of passed examination through resistance just to carry out middle temperature type resistance furnace heating quenching, is that piston ring heats in batch, and heating-up temperature is (860 ± 10) DEG C, warm after, put into quenching cooling in lO%NaCl aqueous solution, be tempered in time；
4) piston ring tempering: using same equipment, same special mould clamp, same method operates, temperature 550 600 DEG C, and warm rear air cooling is to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410770155.3A CN105755269A (en) | 2014-12-15 | 2014-12-15 | Piston ring heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410770155.3A CN105755269A (en) | 2014-12-15 | 2014-12-15 | Piston ring heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105755269A true CN105755269A (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410770155.3A Pending CN105755269A (en) | 2014-12-15 | 2014-12-15 | Piston ring heat treatment process |
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| CN (1) | CN105755269A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756747A (en) * | 2019-11-29 | 2020-02-07 | 安庆海威尔机械有限公司 | Piston ring sand mold forming method |
-
2014
- 2014-12-15 CN CN201410770155.3A patent/CN105755269A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756747A (en) * | 2019-11-29 | 2020-02-07 | 安庆海威尔机械有限公司 | Piston ring sand mold forming method |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |