CN102554580A - Machining process for plunger of high-pressure cylinder - Google Patents
Machining process for plunger of high-pressure cylinder Download PDFInfo
- Publication number
- CN102554580A CN102554580A CN2012100416592A CN201210041659A CN102554580A CN 102554580 A CN102554580 A CN 102554580A CN 2012100416592 A CN2012100416592 A CN 2012100416592A CN 201210041659 A CN201210041659 A CN 201210041659A CN 102554580 A CN102554580 A CN 102554580A
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- China
- Prior art keywords
- plunger
- outer diameter
- semi
- finished
- diameter section
- Prior art date
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
A machining process for a plunger of a high-pressure cylinder relates to the technical field of production of plungers of high-pressure cylinders and includes the steps: firstly, roughly turning and napping 40Cr forging materials and hardening and tempering the forging materials with HB (Brinell hardness) 270-320 by reserving allowance for semi-finishing; finishing a semi-finished plunger placed on a numerical control lathe to form a section with a small outer diameter and a section with a large outer diameter; finishing the section with the large outer diameter to meet the requirement of a finished plunger on dimensional tolerance; performing medium frequency induction hardening HRC (Rockwell hardness) 48-52 treatment for the section with the small outer diameter of the semi-finished plunger; grinding the section with the small outer diameter of the semi-finished plunger according to the requirement of the finished plunger on dimensional tolerance; and plating hard chromium on the outer surface of the semi-finished plunger. The plunger treated by the process is high in surface hardness, fine in wear resistance and beneficial to improving stability of the plunger and prolonging the service life of the cylinder.
Description
Technical field
The present invention relates to the production technical field of a kind of high-voltage oil cylinder, particularly plunger.
Background technology
The frame mode of traditional oil cylinder is adopted in high-voltage oil cylinder design at present mostly, and processing technology also adopts existing mature technology mostly.Plating hard chromium on surface was handled after existing high-voltage oil cylinder plunger adopted modifier treatment usually.Chromium coating is easy to wear behind the frequent movement, takes off chromium, and plunger surface is prone to plucking, leakage of oil.
Summary of the invention
The present invention seeks to propose the plunger processing technology of the better high-voltage oil cylinder of a kind of product technology performance in order to overcome the defective of prior art.
The present invention includes following steps:
1) 40Cr is forged material and carry out rough turn plucking base, stay the semifinishing surplus to carry out modifier treatment HB270～320;
2) the plunger semi-finished product are placed retrofit goes out small outer diameter section and big outer diameter section on the numerically controlled lathe; And big outer diameter section is refined in the size tolerance requirements of finished product requirement;
3) the half-finished small outer diameter section of plunger being carried out mid frequency induction hardening HRC48～52 handles;
4) the half-finished small outer diameter section of plunger is carried out grinding by the size tolerance requirements of finished product requirement;
5) plunger semi-finished product outer surface being carried out hard chrome plating handles.
In addition, in the said step 5), when hard chrome plating was handled, thickness of coating was 0.05mm.
Handle plunger surface mid frequency induction hardening HRC48 of the present invention～52, and high through the plunger surface hardness of above PROCESS FOR TREATMENT, wearability is good, is beneficial to the stability that improves product, is beneficial to the service life of improving oil cylinder.
The specific embodiment
The material of production plunger of the present invention is 40Cr.
The first step: 40Cr is forged material carry out rough turn plucking base, stay the semifinishing surplus to carry out modifier treatment HB270～320.
Second step: modified good plunger semi-finished product clamping on numerically controlled lathe is proofreaied and correct the back segmentation carry out retrofit, form small outer diameter section and big outer diameter section.
Need carry out the position of mid frequency induction hardening except that small outer diameter section and leave the back mill allowance that quenches, all the other all are refined to the size tolerance requirements of drawing design.
The 3rd step: the plunger semi-finished product small outer diameter section that fine finishining is good carries out mid frequency induction hardening HRC48～52.
The 4th step: the plunger semi-finished product small outer diameter section mill that mid frequency induction hardening is good is machined to the drawing dimensional requirement.
The 5th step: plunger small outer diameter section outer surface is carried out hard chrome plating by drawing handle, thickness of coating is 0.05mm.
Claims (2)
1. the plunger processing technology of a high-voltage oil cylinder is characterized in that may further comprise the steps:
1) 40Cr is forged material and carry out rough turn plucking base, stay the semifinishing surplus to carry out modifier treatment HB270～320;
2) the plunger semi-finished product are placed retrofit goes out small outer diameter section and big outer diameter section on the numerically controlled lathe; And big outer diameter section is refined in the size tolerance requirements of finished product requirement;
3) the half-finished small outer diameter section of plunger being carried out mid frequency induction hardening HRC48～52 handles;
4) the half-finished small outer diameter section of plunger is carried out grinding by the size tolerance requirements of finished product requirement;
5) plunger semi-finished product outer surface being carried out hard chrome plating handles.
2. according to the plunger processing technology of the said high-voltage oil cylinder of claim 1, it is characterized in that in the said step 5) that when hard chrome plating was handled, thickness of coating was 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100416592A CN102554580A (en) | 2012-02-23 | 2012-02-23 | Machining process for plunger of high-pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100416592A CN102554580A (en) | 2012-02-23 | 2012-02-23 | Machining process for plunger of high-pressure cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102554580A true CN102554580A (en) | 2012-07-11 |
Family
ID=46401908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100416592A Pending CN102554580A (en) | 2012-02-23 | 2012-02-23 | Machining process for plunger of high-pressure cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102554580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589160A (en) * | 2014-12-31 | 2015-05-06 | 无锡威孚马山油泵油嘴有限公司 | Novel machining technology for grinding plunger |
| CN112025229A (en) * | 2020-09-10 | 2020-12-04 | 天津市顺泽采油设备有限公司 | Machining method of plunger for oil well pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05311467A (en) * | 1992-05-13 | 1993-11-22 | Komatsu Zenoah Co | Surface treatment of piston rod |
| CN101413561A (en) * | 2008-11-24 | 2009-04-22 | 南阳淅减汽车减振器有限公司 | Production process method of automobile vibration damper piston rod |
| CN101655117A (en) * | 2008-08-21 | 2010-02-24 | 山东众力液压技术有限公司 | High-strength engineering machinery hydraulic cylinder |
| CN101705932A (en) * | 2009-11-04 | 2010-05-12 | 上海齐耀动力技术有限公司 | Piston rod for oil-free lubrication gas compressor |
| DE102008062833A1 (en) * | 2008-12-23 | 2010-06-24 | Hydac Electronic Gmbh | Manufacturing parts of position measuring system, comprises providing metallic piston rod of pneumatic cylinder with ferromagnetic core, providing core surface with surface structure, and applying coating system covering surface structure |
| CN201971860U (en) * | 2011-02-12 | 2011-09-14 | 福建省龙岩液压有限公司 | Medium-high frequency quenching bending-resistant anti-deformation device for slender piston rod |
-
2012
- 2012-02-23 CN CN2012100416592A patent/CN102554580A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05311467A (en) * | 1992-05-13 | 1993-11-22 | Komatsu Zenoah Co | Surface treatment of piston rod |
| CN101655117A (en) * | 2008-08-21 | 2010-02-24 | 山东众力液压技术有限公司 | High-strength engineering machinery hydraulic cylinder |
| CN101413561A (en) * | 2008-11-24 | 2009-04-22 | 南阳淅减汽车减振器有限公司 | Production process method of automobile vibration damper piston rod |
| DE102008062833A1 (en) * | 2008-12-23 | 2010-06-24 | Hydac Electronic Gmbh | Manufacturing parts of position measuring system, comprises providing metallic piston rod of pneumatic cylinder with ferromagnetic core, providing core surface with surface structure, and applying coating system covering surface structure |
| CN101705932A (en) * | 2009-11-04 | 2010-05-12 | 上海齐耀动力技术有限公司 | Piston rod for oil-free lubrication gas compressor |
| CN201971860U (en) * | 2011-02-12 | 2011-09-14 | 福建省龙岩液压有限公司 | Medium-high frequency quenching bending-resistant anti-deformation device for slender piston rod |
Non-Patent Citations (1)
| Title |
|---|
| 关世瑛: "提高活塞杆表面强度", 《工程机械》, no. 12, 26 December 1984 (1984-12-26), pages 50 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589160A (en) * | 2014-12-31 | 2015-05-06 | 无锡威孚马山油泵油嘴有限公司 | Novel machining technology for grinding plunger |
| CN112025229A (en) * | 2020-09-10 | 2020-12-04 | 天津市顺泽采油设备有限公司 | Machining method of plunger for oil well pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |