CN103909269B - A kind of powder metallurgy door closer piston and processing technology thereof - Google Patents
A kind of powder metallurgy door closer piston and processing technology thereof Download PDFInfo
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- CN103909269B CN103909269B CN201410151788.6A CN201410151788A CN103909269B CN 103909269 B CN103909269 B CN 103909269B CN 201410151788 A CN201410151788 A CN 201410151788A CN 103909269 B CN103909269 B CN 103909269B
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Abstract
The present invention relates to a kind of powder metallurgy door closer piston and processing technology thereof, the powder metallurgy in this door closer piston comprises atomized iron powder, reduced iron powder, copper powder, nickel powder, micro mist wax, molybdenum powder, titanium valve, graphite powder, niobium and tantalum powder and Cosan; Above-mentioned powder is joined in batch mixer and stirs, then with hydraulic press, it is compressing, then join in net strip sintering furnace and sinter, machined is carried out again with lathe, and be worked into suitable size, and then carry out Quenching Treatment, finally carry out fine grinding process with grinding machine.Compared with prior art, it is few that the piston adopting powder metallurgy die casting to go out has post-production amount, and fine grinding can be installed in door closer a little.It is high that this powder metallurgy door closer piston and processing technology thereof also have production efficiency, good processing accuracy, long service life, also have impact resistance and the high feature of toughness, and its processing and fabricating cost is lower while having anti-wear performance.
Description
Technical field
The present invention relates to raw material and the processing technology of piston, be specifically related to a kind of powder metallurgy door closer piston.
Background technology
The raw material that existing door closer piston uses are all steel parts, adopt the door closer piston of steel processing and fabricating, its later stage teeth portion processing time consuming, effort, and efficiency is not high; The equipment used in process is more, high to the requirement of equipment.But the profile accuracy processed is not high, good not with the degree of engagement of gear, fitness.Such as the manufacturer of some developed countries of Germany adopts costly broaching machine equipment to carry out the teeth portion processing of door closer piston at present, although can ensure certain precision, efficiency is lower, and cost of labor is high, and equipment maintenance cost is also high.Tooth wherein is all pulled out by broaching machine one cutter one cutter.And more domestic manufacturers adopt foundry engieering to produce, but the product teeth portion accuracy of casting is inadequate, and there is the vestige processed and stay at teeth portion gap place, and these all will affect and the coordinating of gear, and also can reduce its service life simultaneously.Therefore, be necessary to improve the raw material of existing door closer piston and skilled worker's technique.
Summary of the invention
The object of the invention is, for prior art Problems existing, provide a kind of processing technology simple, working (machining) efficiency is high, and physical dimension is accurate, the door closer piston of long service life.
For achieving the above object, one of technical scheme of the present invention is to provide a kind of powder metallurgy door closer piston, it is characterized in that, the powder metallurgy raw materials by weight in described door closer piston comprises following composition: the water-atomized iron powder of 50% ~ 55%, the reduced iron powder of 30% ~ 35%, 3% ~ 5% copper powder, 2% ~ 3% nickel powder, 1% ~ 2% micro mist wax, 1% ~ 2% molybdenum powder, 2% ~ 3% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% ~ 0.15% and tantalum powder and 0.4% ~ 0.5% Cosan.
Wherein preferred technical scheme is that described powder metallurgy raw materials by weight comprises following composition: the water-atomized iron powder of 52% ~ 53%, the reduced iron powder of 32% ~ 33%, 3.5% ~ 4.5% copper powder, 2% ~ 3% nickel powder, 1% ~ 2% micro mist wax, 1% ~ 2% molybdenum powder, 2% ~ 3% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% ~ 0.15% and tantalum powder and 0.4% ~ 0.5% Cosan.
Two of technical scheme of the present invention is to provide a kind of powder metallurgy door closer piston machining process, it is characterized in that: described processing technology comprises following processing step;
Step 1: above-described powdered ingredients is joined in batch mixer by its proportioning and stirs;
Step 2: the powder after being mixed is joined in the mould of the door closer piston be arranged in press, with hydraulic press, it is compressing;
Step 3: the door closer piston after compressing is joined in net strip sintering furnace and sinters;
Step 4: the powder metallurgy door closer piston lathe after sintering is carried out machined, and is worked into suitable size;
Step 5: the powder metallurgy door closer piston after machined is carried out Quenching Treatment again;
Step 6: the powder metallurgy door closer piston grinding machine of Quenching Treatment is carried out fine grinding process.
Wherein preferred technical scheme is that the hydraulic press in described step 2 is 200 tons of Full Automatic Liquid press.
Preferred technical scheme also has, and join in described step 3 in net strip sintering furnace and carry out sintering and be divided into three sintering stages, the first sintering stage was pre-burning section, and the sintering temperature of pre-burning section is 650 degree ~ 950 degree, and sintering time is 60 minutes; Second sintering stage was high temperature section, and the sintering temperature of high temperature section is 1150 degree ~ 1250 degree, and sintering time is 90 minutes; 3rd sintering stage was cooling stage, and cooling stage terminates rear stopping heating by high temperature section to be cooled to environment temperature, and the cooling section time is 90 minutes.
Preferred technical scheme also has, and the lathe in described step 4 is lathe.
Preferred technical scheme also has, the Quenching Treatment in described step 5 be by machined after door closer piston put into after heat-treatment furnace is heated to 850 degree and put into cooling fluid chilling again.
Preferred technical scheme also has, and in described step 5, after Quenching Treatment, the Brinell hardness of door closer piston reaches 150 to 180.
Compared with prior art, the invention has the beneficial effects as follows: it is few that the piston adopting powder metallurgy die casting to go out has post-production amount, fine grinding can be installed in door closer a little, and rub proofness can reach Europe superscript: more than 500,000 Life Cycle tests.Powder metallurgy wearability is well-known, compared with steel part, cast member advantageously.It is high that this powder metallurgy door closer piston and processing technology thereof also have production efficiency, good processing accuracy, long service life, also have impact resistance and the high feature of toughness, and its processing and fabricating cost is lower while having anti-wear performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of powder metallurgy piston of the present invention;
Fig. 2 is that the mechanism of powder metallurgy piston of the present invention is for artwork.
Detailed description of the invention
Embodiment 1
The present invention is a kind of powder metallurgy door closer piston, and the powder metallurgy raw materials by weight in this door closer piston comprises following composition: the water-atomized iron powder of 50%, the reduced iron powder of 35%, 5% copper powder, 3% nickel powder, 2% micro mist wax, 2% molybdenum powder, 2% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% and tantalum powder and 0.4% Cosan.
Two of technical scheme of the present invention is to provide a kind of powder metallurgy door closer piston machining process, it is characterized in that: described processing technology comprises following processing step;
Step 1: above-described powdered ingredients is joined in batch mixer by its proportioning and stirs;
Step 2: the powder after being mixed is joined in the mould of the door closer piston be arranged in press, with hydraulic press, it is compressing;
Step 3: the door closer piston after compressing is joined in net strip sintering furnace and sinters;
Step 4: the powder metallurgy door closer piston lathe after sintering is carried out machined, and is worked into suitable size;
Step 5: the powder metallurgy door closer piston after machined is carried out Quenching Treatment again;
Step 6: the powder metallurgy door closer piston grinding machine of Quenching Treatment is carried out fine grinding process.
Wherein preferred technical scheme is that the hydraulic press in described step 2 is 200 tons of Full Automatic Liquid press.
Preferred embodiment also has, and join in described step 3 in net strip sintering furnace and carry out sintering and be divided into 3 sintering stages, the first sintering stage was pre-burning section, and the sintering temperature of pre-burning section is 650 degree, and sintering time is 60 minutes; Second sintering stage was high temperature section, and the sintering temperature of high temperature section is 1150 degree, and sintering time is 90 minutes; Second sintering stage was cooling stage, and cooling stage terminates rear stopping heating by high temperature section to be cooled to environment temperature, and the cooling section time is 90 minutes.
Preferred embodiment also has, and the lathe in described step 4 is lathe.
Preferred embodiment also has, the Quenching Treatment in described step 5 be by machined after door closer piston put into after heat-treatment furnace is heated to 850 degree and put into cooling fluid chilling again.
Preferred technical scheme also has, and in described step 5, after Quenching Treatment, the Brinell hardness of door closer piston reaches 150 to 180.
Embodiment 2
The present invention is a kind of powder metallurgy door closer piston, and the powder metallurgy raw materials by weight in this door closer piston comprises following composition: the water-atomized iron powder of 55%, the reduced iron powder of 30%, 5% copper powder, 3% nickel powder, 2% micro mist wax, 2% molybdenum powder, 2% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% and tantalum powder and 0.4% Cosan.
Two of technical scheme of the present invention is to provide a kind of powder metallurgy door closer piston machining process, it is characterized in that: described processing technology comprises following processing step;
Step 1: above-described powdered ingredients is joined in batch mixer by its proportioning and stirs;
Step 2: the powder after being mixed is joined and closes in the mould of the door device piston be arranged in press, with hydraulic press, it is compressing;
Step 3: the door closer piston after compressing is joined in net strip sintering furnace and sinters;
Step 4: the powder metallurgy door closer piston lathe after sintering is carried out machined, and is worked into suitable size;
Step 5: the powder metallurgy door closer piston after machined is carried out Quenching Treatment again;
Step 6: the powder metallurgy door closer piston grinding machine of Quenching Treatment is carried out fine grinding process.
Wherein preferred technical scheme is that in described step 2, the press of oil is 200 tons of Full Automatic Liquid press.
Preferred embodiment also has, and join in described step 3 in net strip sintering furnace and carry out sintering and be divided into 3 sintering stages, the first sintering stage was pre-burning section, and the sintering temperature of pre-burning section is 650 degree, and sintering time is 60 minutes; Second sintering stage was high temperature section, and the sintering temperature of high temperature section is 1150 degree, and sintering time is 90 minutes; Second sintering stage was cooling stage, and cooling stage terminates rear stopping heating by high temperature section to be cooled to environment temperature, and the cooling section time is 90 minutes.
Preferred embodiment also has, and the lathe in described step 4 is lathe.
Preferred embodiment also has, the Quenching Treatment in described step 5 be by machined after door closer piston put into after heat-treatment furnace is heated to 850 degree and put into cooling fluid chilling again.
Preferred technical scheme also has, and in described step 5, after Quenching Treatment, the Brinell hardness of door closer piston reaches 150 to 180.
Embodiment 3
The present invention is a kind of powder metallurgy door closer piston, and the powder metallurgy raw materials by weight in this door closer piston comprises following composition: the water-atomized iron powder of 53%, the reduced iron powder of 34%, 3% copper powder, 2% nickel powder, 2% micro mist wax, 2% molybdenum powder, 3% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% and tantalum powder and 0.4% Cosan.
Two of technical scheme of the present invention is to provide a kind of powder metallurgy door closer piston machining process, it is characterized in that: described processing technology comprises following processing step;
Step 1: above-described powdered ingredients is joined in batch mixer by its proportioning and stirs;
Step 2: the powder after being mixed is joined in the mould of the door closer piston be arranged in press, with hydraulic press, it is compressing;
Step 3: the door closer piston after compressing is joined in net strip sintering furnace and sinters;
Step 4: the powder metallurgy door closer piston lathe after sintering is carried out machined, and is worked into suitable size;
Step 5: the powder metallurgy door closer piston after machined is carried out Quenching Treatment again;
Step 6: the powder metallurgy door closer piston grinding machine of Quenching Treatment is carried out fine grinding process.
Wherein preferred technical scheme is that the hydraulic press in described step 2 is 200 tons of Full Automatic Liquid press.
Preferred embodiment also has, and join in described step 3 in net strip sintering furnace and carry out sintering and be divided into 3 sintering stages, the first sintering stage was pre-burning section, and the sintering temperature of pre-burning section is 650 degree, and sintering time is 60 minutes; Second sintering stage was high temperature section, and the sintering temperature of high temperature section is 1150 degree, and sintering time is 90 minutes; Second sintering stage was cooling stage, and cooling stage terminates rear stopping heating by high temperature section to be cooled to environment temperature, and the cooling section time is 90 minutes.
Preferred embodiment also has, and the lathe in described step 4 is lathe.
Preferred embodiment also has, the Quenching Treatment in described step 5 be by machined after door closer piston put into after heat-treatment furnace is heated to 850 degree and put into cooling fluid chilling again.
Preferred technical scheme also has, and in described step 5, after Quenching Treatment, the Brinell hardness of door closer piston reaches 150 to 180.
The invention is not restricted to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, all can not exceed the protection domain of design of the present invention and claims.
Claims (8)
1. a powder metallurgy door closer piston, it is characterized in that, the powder metallurgy raw materials by weight in described door closer piston comprises following composition: the water-atomized iron powder of 50% ~ 55%, the reduced iron powder of 30% ~ 35%, 3% ~ 5% copper powder, 2% ~ 3% nickel powder, 1% ~ 2% micro mist wax, 1% ~ 2% molybdenum powder, 2% ~ 3% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% ~ 0.15% and tantalum powder and 0.4% ~ 0.5% Cosan.
2. powder metallurgy door closer piston according to claim 1, is characterized in that: described powder metallurgy raw materials by weight comprises following composition: the water-atomized iron powder of 52% ~ 53%, the reduced iron powder of 32% ~ 33%, 3.5% ~ 4.5% copper powder, 2% ~ 3% nickel powder, 1% ~ 2% micro mist wax, 1% ~ 2% molybdenum powder, 2% ~ 3% titanium valve, the graphite powder of 0.5%, the niobium of 0.1% ~ 0.15% and tantalum powder and 0.4% ~ 0.5% Cosan.
3. a powder metallurgy door closer piston machining process, is characterized in that: described processing technology comprises following processing step;
Step 1: the powdered ingredients described in claim 1 or 2 is joined in batch mixer by its proportioning and stirs;
Step 2: the powder after being mixed is joined in the mould of the door closer piston be arranged in press, with hydraulic press, it is compressing;
Step 3: the door closer piston after compressing is joined in net strip sintering furnace and sinters;
Step 4: the powder metallurgy door closer piston lathe after sintering is carried out machined, and is worked into suitable size;
Step 5: the powder metallurgy door closer piston after machined is carried out Quenching Treatment again;
Step 6: the powder metallurgy door closer piston grinding machine of Quenching Treatment is carried out fine grinding process.
4. powder metallurgy door closer piston machining process according to claim 3, is characterized in that: the hydraulic press in described step 2 is 200 tons of Full Automatic Liquid press.
5. powder metallurgy door closer piston machining process according to claim 3, it is characterized in that: join in described step 3 in net strip sintering furnace and carry out sintering and be divided into three sintering stages, first sintering stage was pre-burning section, the sintering temperature of pre-burning section is 650 degree ~ 950 degree, and sintering time is 60 minutes; Second sintering stage was high temperature section, and the sintering temperature of high temperature section is 1150 degree ~ 1250 degree, and sintering time is 90 minutes; 3rd sintering stage was cooling stage, and cooling stage terminates rear stopping heating by high temperature section to be cooled to environment temperature, and the cooling section time is 90 minutes.
6. powder metallurgy door closer piston machining process according to claim 3, is characterized in that: the lathe in described step 4 is lathe.
7. powder metallurgy door closer piston machining process according to claim 3, is characterized in that: the Quenching Treatment in described step 5 be by machined after door closer piston put into after heat-treatment furnace is heated to 850 degree and put into cooling fluid chilling again.
8. powder metallurgy door closer piston machining process according to claim 3, is characterized in that: in described step 5, after Quenching Treatment, the Brinell hardness of door closer piston reaches 150 to 180.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410151788.6A CN103909269B (en) | 2014-04-16 | 2014-04-16 | A kind of powder metallurgy door closer piston and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410151788.6A CN103909269B (en) | 2014-04-16 | 2014-04-16 | A kind of powder metallurgy door closer piston and processing technology thereof |
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| CN103909269A CN103909269A (en) | 2014-07-09 |
| CN103909269B true CN103909269B (en) | 2015-08-12 |
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| CN106563798A (en) * | 2016-11-01 | 2017-04-19 | 安徽恒均粉末冶金科技股份有限公司 | Powder metallurgy preparation method of engine mandrel |
| CN106994514A (en) * | 2017-04-20 | 2017-08-01 | 石家庄精石新材料科技有限公司 | A kind of method for manufacturing automobile engine balance system mandrel |
| CN107142415A (en) * | 2017-04-20 | 2017-09-08 | 石家庄精石新材料科技有限公司 | A kind of composite powder metallurgy material and its method for manufacturing motorcycle balancing driven tooth wheel disc |
| CN107138925A (en) * | 2017-07-11 | 2017-09-08 | 苏州市万雄机械制造有限公司 | The processing method of door closer piston |
| CN107365947B (en) * | 2017-07-24 | 2019-07-23 | 石家庄精石新材料科技有限公司 | Flower card wire shank holding element and its preparation process in a kind of powder metallurgy tricot machine |
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| DE102007042270A1 (en) * | 2007-09-06 | 2009-03-12 | Dorma Gmbh + Co. Kg | Door closer for controlling movement of door leaf, has controlling device including pressurizing medium-spring-damper unit with piston unit that partially conveys pressurizing medium from chamber to another chamber |
| CN201321781Y (en) * | 2008-11-18 | 2009-10-07 | 朱力克 | A piston for door closer |
| CN203051739U (en) * | 2013-01-15 | 2013-07-10 | 瑞安市华东锻造有限公司 | Wear-resistant door closer piston |
| CN103252491A (en) * | 2013-04-09 | 2013-08-21 | 吴建平 | Method for preparing powder metallurgy of engine piston pin |
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Patent Citations (6)
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| CN1922380A (en) * | 2004-01-13 | 2007-02-28 | 株式会社村越精工 | Damping device |
| CN1768985A (en) * | 2004-09-27 | 2006-05-10 | 杰富意钢铁株式会社 | Iron-based mixed powder for powder metallurgy and sintered body |
| DE102007042270A1 (en) * | 2007-09-06 | 2009-03-12 | Dorma Gmbh + Co. Kg | Door closer for controlling movement of door leaf, has controlling device including pressurizing medium-spring-damper unit with piston unit that partially conveys pressurizing medium from chamber to another chamber |
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| CN103252491A (en) * | 2013-04-09 | 2013-08-21 | 吴建平 | Method for preparing powder metallurgy of engine piston pin |
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Denomination of invention: Powder metal door closer piston and machining process thereof Effective date of registration: 20160315 Granted publication date: 20150812 Pledgee: Anyang credit guarantee investment Co., Ltd. Pledgor: Liu Guiping Registration number: 2016410000003 |
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