CN1306191C - Tech for preparing drum of concrete transfer pump - Google Patents
Tech for preparing drum of concrete transfer pump Download PDFInfo
- Publication number
- CN1306191C CN1306191C CNB2004100265422A CN200410026542A CN1306191C CN 1306191 C CN1306191 C CN 1306191C CN B2004100265422 A CNB2004100265422 A CN B2004100265422A CN 200410026542 A CN200410026542 A CN 200410026542A CN 1306191 C CN1306191 C CN 1306191C
- Authority
- CN
- China
- Prior art keywords
- cylinder barrel
- transmission
- pump cylinders
- concrete
- barrel
- 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.)
- Expired - Fee Related
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Classifications
-
- 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
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- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention relates to technology for preparing a cylinder barrel of a concrete delivery pump, which is characterized in that The cylinder barrel of a concrete delivery pump adopts 38CrMoAl steel alloy as base metal material, and the strength, abrasion resistance and corrosion resistance of the material are better than those of general NO. 45 steel. The 38CrMoAl steel alloy is cast into the barrel body of the cylinder barrel of a concrete delivery pump, and then, medium frequency treatment is carried out to the inner surface of the barrel body of the cylinder barrel. Finally, surface nitrogen treatment is carried out to the surface of the whole cylinder barrel to ensure that the nitrogen depth of the surface nitrogen treatment is larger than or equal to 0.35mm. The cylinder barrel prepared by the technology has the advantages that not only are the integral strength and the abrasion resistance of the cylinder barrel enhanced, but also the hardness of the inner surface of the cylinder barrel can reach more than HV1100.
Description
[technical field]
The present invention relates to a kind of building machinery manufacturing process, relate in particular to selecting materials and preparation process of a kind of transmission and concrete transmission pump cylinders.
[background technique]
At present, along with industrial expansion, the chromium coating of electroplating wear resistance in the machine-building is widely used.Wear resistance chromium plating claims hard chrome again, it is a kind of functional plating, mainly be to utilize the characteristic of chromium to improve the hardness of mechanical parts, wear-resisting, heatproof and chemical property such as anti-corrosion, its advantage is: after plating certain thickness one deck hard chrome, the life-span 3-5 that can prolong plating piece doubly.Therefore, in practice, transmission and concrete transmission pump cylinders originally also all adopts the method for the chromium coating of electroplating wear resistance to handle inner wall of cylinder in order to increase the service life.But the inventor finds in practice, in case chromium coating begins to come off, even have only very trickle part to occur coming off, also can cause the chromium coating of bulk to come off from metallic matrix.Its essential reason is can not compoundly fully be one between metallic matrix and the chromium coating, and their compound degree is subjected to the influence of material and technology.And the chromium pull-up falls behind the i.e. quick-wearing very of cylinder barrel.So, though there is lengthening in the life-span of above-mentioned chromium coating cylinder barrel, change but needs are frequent, both increased cost of production, wasted great deal of steel again.
[summary of the invention]
Based on this, the purpose of this invention is to provide a kind of technology transmission and concrete transmission pump cylinders preparation process simple, with low cost.Go out the transmission and concrete transmission pump cylinders that hardness is bigger, the life-span is longer by this explained hereafter.
For this reason, the present invention is achieved in that a kind of transmission and concrete transmission pump cylinders preparation process, it is characterized in that described transmission and concrete transmission pump cylinders adopts the 38CrMoAl alloyed steel as metal matrix material, the intensity of this material, wear resistance and anti-corrosion capacity all are better than the original general 45# steel that adopts.Earlier the 38CrMoAl alloyed steel is cast as transmission and concrete transmission pump cylinders cylindrical shell, give intermediate frequency process with the cylinder barrel cylinder inner surface then, this intermediate frequency process is that mid frequency induction hardening is handled, and the surface with whole cylinder barrel gives surfaces nitrided processing at last, makes the nitrogenize degree of depth 〉=0.35mm of this surfaces nitrided processing.By the cylinder barrel of above-mentioned technology preparation, not only cylinder barrel integral intensity and wear resistance improve greatly, and the internal surface hardness of cylinder barrel can reach more than the HV1100.
Advantage of the present invention is that this preparation process is easy and practical.And the transmission and concrete transmission pump cylinders that the present invention produces is because selection is reasonable, technology is simply advanced, improved the hardness of cylinder barrel internal surface greatly, increase cylinder barrel self integral intensity and wear resistance effectively, thereby fundamentally solved the shortcoming that coating that original technology exists comes off.The cost of production of cylinder barrel can be than original reduction by 30%, and can increase more than 3 times working life than original chromium coating cylinder barrel.
[description of drawings]
Fig. 1 is the schematic representation of transmission and concrete transmission pump cylinders of the present invention.
Among the figure: 1. metallic matrix, 2. cylinder inner surface.
[embodiment]
Embodiments of the invention are: a kind of transmission and concrete transmission pump cylinders preparation process, adopt metallic matrix 1 material of 38CrMoAl alloyed steel as described transmission and concrete transmission pump cylinders, the intensity of this material, wear resistance and anti-corrosion capacity all are better than the original general 45# steel that adopts.Earlier the 38CrMoAl alloyed steel is cast as the transmission and concrete transmission pump cylinders, cylinder inner surface 2 with cylinder barrel carries out intermediate frequency process then, at last whole cylinder barrel is carried out surfaces nitrided processing, internal surface 2 hardness of the cylinder barrel that the nitrogenize degree of depth 〉=0.35mm. of this surfaces nitrided processing obtains can be reached more than the HV1100.
Claims (2)
1, a kind of transmission and concrete transmission pump cylinders preparation process is characterized in that: earlier the 38CrMoAl alloyed steel is cast as the transmission and concrete transmission pump cylinders, the cylinder inner surface with cylinder barrel carries out intermediate frequency process then, at last whole cylinder barrel cylindrical shell is carried out surfaces nitrided processing.
2, according to the described transmission and concrete transmission pump cylinders of claim 1 preparation process, it is characterized in that the nitrogenize degree of depth 〉=0.35mm of described surfaces nitrided processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100265422A CN1306191C (en) | 2004-03-16 | 2004-03-16 | Tech for preparing drum of concrete transfer pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100265422A CN1306191C (en) | 2004-03-16 | 2004-03-16 | Tech for preparing drum of concrete transfer pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563748A CN1563748A (en) | 2005-01-12 |
| CN1306191C true CN1306191C (en) | 2007-03-21 |
Family
ID=34480633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100265422A Expired - Fee Related CN1306191C (en) | 2004-03-16 | 2004-03-16 | Tech for preparing drum of concrete transfer pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1306191C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013053098A1 (en) * | 2011-10-10 | 2013-04-18 | 长沙中联重工科技发展股份有限公司 | Delivery cylinder and preparation method thereof, and pumping equipment comprising same |
| CN102359590B (en) * | 2011-10-10 | 2013-08-14 | 中联重科股份有限公司 | Transport cylinder and manufacturing method thereof as well as pumping device comprising transport cylinder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03255273A (en) * | 1990-03-06 | 1991-11-14 | Teikoku Piston Ring Co Ltd | Cylinder liner |
| EP0745450A2 (en) * | 1995-05-27 | 1996-12-04 | Audi Ag | Process for machining of workpiece surfaces |
| JPH093506A (en) * | 1995-06-16 | 1997-01-07 | Fuji Oozx Inc | Production of tappet for internal combustion engine |
-
2004
- 2004-03-16 CN CNB2004100265422A patent/CN1306191C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03255273A (en) * | 1990-03-06 | 1991-11-14 | Teikoku Piston Ring Co Ltd | Cylinder liner |
| EP0745450A2 (en) * | 1995-05-27 | 1996-12-04 | Audi Ag | Process for machining of workpiece surfaces |
| JPH093506A (en) * | 1995-06-16 | 1997-01-07 | Fuji Oozx Inc | Production of tappet for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1563748A (en) | 2005-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070321 Termination date: 20140316 |