CN101413561A - Production process method of automobile vibration damper piston rod - Google Patents
Production process method of automobile vibration damper piston rod Download PDFInfo
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- CN101413561A CN101413561A CNA2008102310204A CN200810231020A CN101413561A CN 101413561 A CN101413561 A CN 101413561A CN A2008102310204 A CNA2008102310204 A CN A2008102310204A CN 200810231020 A CN200810231020 A CN 200810231020A CN 101413561 A CN101413561 A CN 101413561A
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Abstract
The invention relates to a production technological process of a piston rod of a car damper. The process comprises blanking, aligning, coarse grinding, machining, semi-fine grinding, fine grinding, surface rolling, compound treatment with a salt bath and post-surface rolling. Compared with the traditional process, the process avoids three procedures with high-energy consumption and high pollution, namely, quenching, chromium plating and dehydrogenation, meanwhile, the process also avoids the procedures of the coarse grinding and the semi-fine grinding, and is added with the procedures of compound nitridation with the salt bath and rolling, thus the process has the advantages of short production cycle, high production efficiency, low rejection rate, rust prevention, good wear resistant property, long service life and the like. The process also avoids environmental pollution and reduces the manufacturing cost of the piston rod.
Description
Technical field
The invention belongs to field of metal surface treatment technology, is a kind of production process method of automobile vibration damper piston rod.
Background technique
Automobile vibration damper piston rod belongs to the slender rod type part, and the height of instantaneous motion speed in use, static load that carries and dynamic load are all very big, operating conditions is more abominable, the one, surface friction frequency height, intermittent time is short, and the 2nd, outer connection part usually is in the stronger aggressive medium, damaged by it.Quality requirement to the piston rod processing and fabricating is very strict, and higher piston rod quality is the important assurance of automobile balance safety traffic.Though piston rod belongs to miniature parts, but processing at present but needs twenties procedures, generally the manufacturing procedure of Cai Yonging comprises: the blanking → preceding alignment of the quenching → preceding corase grind of quenching → quench → quench back corase grind → turning → slot rolling → boring → towards side → milling flat → roll threading → mill small end → partly finish grind I → partly finish grind II → correct grinding → chromium plating → dehydrogenation → plate later half correct grinding → correct grinding → super grinding → operations such as finished product, this processing method not only manufacturing procedure is many, manufacture cycle is long, yield rate is low, the fabricating cost height, the piston rod performance that main is is processed does not reach the requirement of use, most critical be that its surface strength is low, wear-resisting property is poor, next is that outer connection part is anti-oxidation, corrosion resistance is low, so working life is short.In addition, because its procedure is earlier raw material to be quenched, then carry out machine cut, bring back working procedure processing difficulty big, efficient is low, and quality is difficult to drawbacks such as assurance.In order to improve the scurf resistance of piston rod surface, generally adopted the chromium plating sclerosis, and the chromium plating operation is extremely serious to harm of operator's human body and environmental pollution, eliminate for many years in developed country, and often there is the dead angle in the piston rod outer connection part in plating, the fastness of coating is also poor, so antiseptic effect does not reach requirement yet.So far piston rod cost of production height, the problem of performance quality difference also do not obtain comparatively satisfied solution.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can improve piston rod surface wear resistance and corrosion resistance, and can shorten the manufacture cycle, stop environmental pollution, can effectively solve the shock absorber piston rod manufacturing technique method of the antirust problem in surface, piston rod Vehicle Processing position simultaneously again.
Realize that the technological scheme that purpose of the present invention is taked is: the production technology of piston rod is: blanking → alignment → corase grind → turning, Milling Process → half correct grinding → correct grinding → rolling finishing → salt bath compounding → back rolling finishing → finished product,
The step of described salt bath compounding is:
(1) oil removal treatment: with the piston rod after the rolling finishing, behind the anchor clamps clamping, insert in the oil removing groove, utilize degreaser to carry out oil removal treatment;
(2) preheating: the piston rod after the oil removing is seated in carries out preheating in the preheating oven, preheating temperature 350-450 ℃, insulation 20-40min;
(3) nitrided surface is handled: basic salt is put into the nitriding furnace heat fused, then the piston rod after the preheating is inserted nitriding furnace and carry out surperficial salt Bath Nitriding Treatment, the salt-bath nitriding temperature is 520-700 ℃, insulation 10-180min, wherein, the addition of basic salt is to get final product the workpiece nitrided surface all can be submerged after the fusing, in processing procedure, when the cyanate radical of nitrogenize salt bath descends, regularly add regenerant salt, so that cyanate radical content rises in the set quota scope in the salt bath to nitriding furnace;
(4) oxidation processes: saline oxide joined in the oxidation furnace melt, then the piston rod behind the salt-bath nitriding is inserted oxidation furnace and carry out oxidation processes, oxidation heating-up temperature: 350-450 ℃, insulation 15-30min, wherein, the addition of saline oxide is to get final product the workpiece oxidized surface all can be submerged after dissolving;
(5) cleaning of desalting: the piston rod after the oxidation is inserted the cleaning of desalting in the washing agent groove;
(6) drying: the piston rod natural air drying after will cleaning;
(7) immersion oil: dried piston rod inserted carry out antirust processing in the oil groove, the piston rod behind the finished product is black.
The beneficial effect of above-mentioned shock absorber piston rod manufacturing technique method is:
1) adopts technology of the present invention, save quenching, chromium plating, dehydrogenation 3 road high energy consumptions, high pollution operation than tratitional technology, also saved quench back corase grind and half precision grinding process simultaneously, thus with short production cycle, not only improve manufacturing efficiency, and greatly reduced the manufacture cost of piston rod.
2) piston rod after the salt bath compounding can strengthen the wear resistance and the corrosion resistance of piston rod surface, and the piston rod life-span is greatly improved.Simultaneously also solve the antirust problem of piston rod surface effectively, stopped the environmental pollution that causes because of plating.
The rolling finishing operation of 3) setting up can improve piston rod surface quality and intensity, reduces Surface Flaw, improves the wear resistance and the working life of piston rod.
4) adopt technological method of the present invention, make piston rod in salt bath compounding operation, its product percent of pass can reach more than 99.8%; Particularly adopt the salt bath compounding no longer to produce disposal of pollutants, reduced environmental pollution, and piston rod no longer carries out grinding after the salt bath compounding, simultaneously, also can avoid in the tratitional technology about 5% the waster that causes because of plating, and, greatly reduce reject rate because of plating about 3% useless, inferior, the reprocessed products that the back grinding causes.
Embodiment
It is raw material that production process method of automobile vibration damper piston rod of the present invention, its piston rod are selected middle-carbon steel for use, generally adopts 35
#Or 45
#Steel, the processing technology of piston rod is: blanking → alignment → corase grind → turning, Milling Process → half essence → correct grinding → rolling finishing → salt bath compounding → back rolling finishing → finished product.The technology in advance that this technology compares, reduced the preceding quenching and the back corase grind operation of quenching of cutting, be adjusted into half precision grinding process together by twice half precision grinding process after the cutting, and cancelled seriously polluted, the second-rate chromium plating operation in back, corresponding cancelled dehydrogenation and take a lot of work, precision grinding process and super grinding operation behind the time-consuming later half correct grinding of plating, plating, thereby can save the plenty of time, improve manufacturing efficiency greatly.Simultaneously,, reduced the fragility of piston rod finished product on the one hand, can avoid the brittle failure in the using process preferably, usability has been improved greatly owing to cancelled the quenching and the back corase grind operation of quenching in the current technology; Improve the technology capability of cutting process on the other hand, improved the efficient of cutting thus greatly, reduced the waste product probability of cutting process.This technology has increased twice surface rolling operation and composite nitride treating process after cutting, wherein, carry out roll extrusion and can strengthen the bulk strength and the surface abrasion resistance intensity of piston rod greatly, can keep piston rod toughness preferably simultaneously, improve its surface accuracy and degree of finish.It is the chemical surface treatment that a kind of nonhazardous is polluted that the salt bath composite nitride is handled, and can further strengthen the scurf resistance of piston rod surface, has solved the anticorrosive problem of outer connection part simultaneously preferably.Therefore, according to the piston rod of this technological method processing, its usability and working life can be compared U.S. with advanced international standard fully, and its processing cost is far below external level of the same trade.
In the present invention, the mode of execution that piston rod is carried out the salt bath compounding carries out by the following method:
At first,, insert in the oil removing groove, utilize degreaser that the greasy dirt of piston rod surface is cleaned up, and dry or dry, keep the cleaning on its surface the piston rod after the rolling finishing, guaranteeing its nitrogenize quality,
Again the piston rod after the oil removing is put into preheating oven and carry out preheating, preheating temperature 350-450 ℃, insulation 20-40min makes it reach reaction temperature condition with nitrogenize base salt.Then, in nitriding furnace, put into nitrogenize base salt, the addition of its basic salt is the workpiece nitrided surface all can being submerged and get final product after the fusing, and guarantees that cyanate radical content in the basic salt reaches the concentration index of regulation, heats then to make basic salt reach molten state, piston rod after the preheating is inserted in the nitrogenize base salt, continue heating, make its temperature reach 520-700 ℃, and insulation 10-180min, by nitriding treatment, can further strengthen the scurf resistance of piston rod surface and stronger corrosion resistance.Then, carry out oxidation processes again, its method is saline oxide to be joined in the oxidation furnace melt, the addition of saline oxide is to get final product the workpiece oxidized surface all can be submerged after dissolving, then the piston rod behind the salt-bath nitriding is inserted oxidation furnace and carry out oxidation processes, heating-up temperature is to 350-450 ℃, then be incubated 15-30min, make piston rod surface form uniform oxidation resin layer, and reach design thickness, then the piston rod after the oxidation is inserted in the washing agent groove, remove the remaining salification on its surface clean.At last, with the piston rod natural air drying after cleaning, insert and carry out the immersion oil processing in the antirust oil groove, be finished product, it is to be installed finished product to be sent into the parts library preservation again, and the piston rod after the processing is black thus.
Claims (2)
1, a kind of production process method of automobile vibration damper piston rod, it is characterized in that: it comprises: blanking → alignment → corase grind → turning, Milling Process → half correct grinding → correct grinding → rolling finishing → salt bath compounding → back rolling finishing → finished product.
2, production process method of automobile vibration damper piston rod according to claim 1,, it is characterized in that: the step of described salt bath compounding is:
(1) oil removal treatment: with the piston rod after the rolling finishing, behind the anchor clamps clamping, insert in the oil removing groove, utilize degreaser to carry out oil removal treatment;
(2) preheating: the piston rod after the oil removing is seated in carries out preheating in the preheating oven, preheating temperature 350-450 ℃, insulation 20-40min;
(3) nitrided surface is handled: basic salt is put into the nitriding furnace heat fused, then the piston rod after the preheating is inserted nitriding furnace and carry out surperficial salt Bath Nitriding Treatment, the salt-bath nitriding temperature is 520-700 ℃, insulation 10-180min, wherein, the addition of basic salt is to get final product the workpiece nitrided surface all can be submerged after the fusing, in processing procedure, when the cyanate radical of nitrogenize salt bath descends, regularly add regenerant salt, so that cyanate radical content rises in the set quota scope in the salt bath to nitriding furnace;
(4) oxidation processes: saline oxide joined in the oxidation furnace melt, then the piston rod behind the salt-bath nitriding is inserted oxidation furnace and carry out oxidation processes, oxidation heating-up temperature: 350-450 ℃, insulation 15-30min, wherein, the addition of saline oxide is to get final product the workpiece oxidized surface all can be submerged after dissolving;
(5) cleaning of desalting: the piston rod after the oxidation is inserted the cleaning of desalting in the washing agent groove;
(6) drying: the piston rod natural air drying after will cleaning;
(7) immersion oil: dried piston rod inserted carry out antirust processing in the oil groove, the piston rod behind the finished product is black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810231020A CN100591944C (en) | 2008-11-24 | 2008-11-24 | Production technology of damper piston rod of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810231020A CN100591944C (en) | 2008-11-24 | 2008-11-24 | Production technology of damper piston rod of automobile |
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| Publication Number | Publication Date |
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| CN101413561A true CN101413561A (en) | 2009-04-22 |
| CN100591944C CN100591944C (en) | 2010-02-24 |
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| CN200810231020A Active CN100591944C (en) | 2008-11-24 | 2008-11-24 | Production technology of damper piston rod of automobile |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862940A (en) * | 2010-05-17 | 2010-10-20 | 隆昌山川精密焊管有限责任公司 | Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle |
| CN102554580A (en) * | 2012-02-23 | 2012-07-11 | 扬州市飞龙气动液压设备有限公司 | Machining process for plunger of high-pressure cylinder |
| CN102719784A (en) * | 2012-07-03 | 2012-10-10 | 株洲联诚集团有限责任公司 | Preparation method for improving abrasion resistance of piston rod of oil damper of motor vehicle |
| CN103692173A (en) * | 2012-09-27 | 2014-04-02 | 常州南车柴油机零部件有限公司 | Machining process for integral ductile cast iron piston |
| CN105063325A (en) * | 2015-09-09 | 2015-11-18 | 湖南晟宏新材料科技有限公司 | Band saw blade heat treatment technology |
| CN107457613A (en) * | 2017-08-08 | 2017-12-12 | 蒂森克虏伯普利斯坦汽车零部件（上海）有限公司 | A kind of processing method of worm shaft |
| CN107553232A (en) * | 2017-10-11 | 2018-01-09 | 江苏新合益机械有限公司 | It is a kind of based on the piston rod production line for exempting from quenched and tempered steel |
| CN108950469A (en) * | 2018-07-12 | 2018-12-07 | 通富热处理(昆山)有限公司 | The nitrocarburizing of piston lever of reducer for automobile-oxidation composite treatment process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB894179A (en) * | 1960-01-22 | 1962-04-18 | Daimler Benz Ag | Improvements relating to engine connecting rods |
| DE10245570B3 (en) * | 2002-09-26 | 2004-03-18 | Felss Gmbh | Production of a tubular workpiece, especially a shock absorber piston rod, comprises a second process step in which a transition region is shaped by a deformation process to produce a right-angled shoulder of the workpiece |
| DE102004025865A1 (en) * | 2004-05-27 | 2005-12-22 | Volkswagen Ag | Manufacturing piston rod for vehicle suspension shock absorber, provides unhardened rod with nitrided layer using proprietary plasma process |
| CN1760573A (en) * | 2004-10-15 | 2006-04-19 | 褚兰荣 | Method for manufacturing unitary piston rod |
| KR100766852B1 (en) * | 2006-01-20 | 2007-10-15 | 주식회사 만도 | Piston load of shock absorber capable ofself-levelizing and method of the same |
-
2008
- 2008-11-24 CN CN200810231020A patent/CN100591944C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862940A (en) * | 2010-05-17 | 2010-10-20 | 隆昌山川精密焊管有限责任公司 | Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle |
| CN102554580A (en) * | 2012-02-23 | 2012-07-11 | 扬州市飞龙气动液压设备有限公司 | Machining process for plunger of high-pressure cylinder |
| CN102719784A (en) * | 2012-07-03 | 2012-10-10 | 株洲联诚集团有限责任公司 | Preparation method for improving abrasion resistance of piston rod of oil damper of motor vehicle |
| CN103692173A (en) * | 2012-09-27 | 2014-04-02 | 常州南车柴油机零部件有限公司 | Machining process for integral ductile cast iron piston |
| CN105063325A (en) * | 2015-09-09 | 2015-11-18 | 湖南晟宏新材料科技有限公司 | Band saw blade heat treatment technology |
| CN107457613A (en) * | 2017-08-08 | 2017-12-12 | 蒂森克虏伯普利斯坦汽车零部件（上海）有限公司 | A kind of processing method of worm shaft |
| CN107457613B (en) * | 2017-08-08 | 2019-09-10 | 蒂森克虏伯普利斯坦汽车零部件（上海）有限公司 | A kind of processing method of worm shaft |
| CN107553232A (en) * | 2017-10-11 | 2018-01-09 | 江苏新合益机械有限公司 | It is a kind of based on the piston rod production line for exempting from quenched and tempered steel |
| CN108950469A (en) * | 2018-07-12 | 2018-12-07 | 通富热处理(昆山)有限公司 | The nitrocarburizing of piston lever of reducer for automobile-oxidation composite treatment process |
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|---|---|
| CN100591944C (en) | 2010-02-24 |
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Effective date of registration: 20180508 Address after: 474450 Xichuan City Industrial Park, Nanyang, Henan Patentee after: Nanyang Hao Fan vehicle parts Co., Ltd. Address before: 474450 Nanyang Nanyang Xichuan 76 old car Nanyang Shock Absorber Co., Ltd. Patentee before: Xijian Autocar Dampers Co., Ltd., Nanyang |