CN101648226A - Cold extrusion preliminary forming method for plunger, oil nozzle and oil outlet valve - Google Patents
Cold extrusion preliminary forming method for plunger, oil nozzle and oil outlet valve Download PDFInfo
- Publication number
- CN101648226A CN101648226A CN200910034370A CN200910034370A CN101648226A CN 101648226 A CN101648226 A CN 101648226A CN 200910034370 A CN200910034370 A CN 200910034370A CN 200910034370 A CN200910034370 A CN 200910034370A CN 101648226 A CN101648226 A CN 101648226A
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- China
- Prior art keywords
- cold extrusion
- plunger
- oil nozzle
- forming method
- oil
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- 238000000641 cold extrusion Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 238000007127 saponification reaction Methods 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- 238000005491 wire drawing Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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- Forging (AREA)
Abstract
A cold extrusion preliminary forming method for a plunger, an oil nozzle and an oil outlet valve relates to the production and processing technology of an oil pump oil nozzle, in particular to the technical field of processing three pairs of precise matching parts of the plunger, the oil nozzle and the oil outlet valve. A round bar is obtained by cutting from bearing steel, R arcs are respectively extruded at two ends of the round bar through dies by adopting a cold extruding machine, diameter-changing treatment is carried out through the dies by adopting the cold extruding machine, and the round bar is extruded through the dies by adopting the extrusion molding, so that the plunger, the oil nozzle and the oil outlet valve which are material-saving, efficient and low in cost can be produced.
Description
Technical field
The present invention relates to the processing technique field of the production and processing technology of oil pump nozzle, particularly plunger, oil nozzle, three pairs of precision pairs of delivery valve.
Background technology
Cold extrusion multistation moulding process is used widely in standard component production industry, mechanical industry, stamping parts industry, and its advantage mainly shows and saves steel, economizes on resources, efficient height, cost are low.
Oil pump nozzle precision pair industry is the labour intensive profession of a multiple operation, has consumptive material height, cost height, specification requirement height, inefficient present situation.The critical component that plunger, oil nozzle, three pairs of precision pairs of delivery valve are oil pump nozzles.At present plunger, oil nozzle, delivery valve adds the preliminary moulding of work point and holes two big steps.Wherein, first one-step forming is: get on the bus down from circular bar earlier and omit raw material long and the finished product length that designs, then, the rapid car of branch multistep goes out the cylindrical step of different-diameter.There is following defective in existing preliminary moulding process: a large amount of wastage of material, working (machining) efficiency is low, the cost height.If can adopt cold-extruded technology processing oil pump nozzle precision pair then can economize on resources, raise the efficiency, reduce cost, but because the oil pump nozzle precision pair adopts bearing steel, bearing steel phosphorus content height adopts technology of cold extrusion processing and limited it.
Summary of the invention
The object of the invention be to design a kind of material-saving, efficiently, the preliminary forming method of the cold extrusion of plunger, oil nozzle, delivery valve cheaply.
The present invention includes following steps:
1) cuts off from bearing steel and obtain circular bar;
2) adopt cold extrusion press, extrude the R arc respectively at the two ends of circular bar respectively by mould;
3) adopt cold extrusion press, carry out reducing by mould and handle;
4) adopt cold extrusion press, by the mould extrusion modling.
The utlity model has following characteristics:
1, cut off certainly obtain bar to the first whole process of one-step forming almost without any the loss of workpiece raw material, so its technology saving material, economize on resources.As process the plunger of same specification, and former technology material per ton can only be produced 10893, and the present invention then can produce 17301, and utilization rate of raw materials improves 58.5%.
2, the present invention can increase work efficiency, and everyone can only process 700 plungers in 8 hours former technology, and adopts the present invention to process the product of same specification, and everyone can process 28800 in 8 hours, and efficient improves 41 times.
3, the product density that adopts cold extrusion of the present invention to form is higher than original, and its tight ness rating is beneficial to and improves product service life, also is beneficial to the fineness that improves the surface.
Usually the processing technology of bearing steel is first tempering, again through phosphatization, saponification, and last wire drawing sizing.But in order to cooperate processing technology of the present invention, the procedure of processing of described bearing steel is: first wire drawing, give tempering, phosphatization again, last saponification.The bearing steel that forms with this technology is preferably have been adopted the inventive method and carries out cold extrusion and make the oil pump nozzle precision pair.
The hardness HBW of former bearing steel is generally 194～207, and it is 187～195 that the present invention adopts hardness HBW, is more suitable for cold-extrusion technology of the present invention.
To produce materials in order further saving, to be the dish round steel before bearing steel of the present invention is cut off.
The specific embodiment
One, the processing of bearing steel:
Procedure of processing is: first wire drawing, give tempering, phosphatization again, last saponification.
The hardness HBW of the dish circular journal bearing steel of making is 187～195.
Two, be the preliminary forming operation step of cold extrusion of example with the processing plunger:
1, cuts off the circular bar of obtaining the section of one-tenth from dish circular journal bearing steel.
2, adopt cold extrusion press, extrude different R arcs respectively at the two ends of circular bar respectively with second mold by first cover.
3, adopt cold extrusion press, carry out reducing by the 3rd mold and handle.
4, adopt cold extrusion press, by the extrusion modling of quadruplet mould.
Three, boring.
Four, the semi-products of the first one-step forming that above-mentioned steps is formed quench.
Five, Surface Finishing.
Six, obtain the finished product plunger.
Claims (4)
1, the preliminary forming method of the cold extrusion of plunger, oil nozzle, delivery valve is characterized in that may further comprise the steps:
1) cuts off from bearing steel and obtain circular bar;
2) adopt cold extrusion press, extrude the R arc respectively at the two ends of circular bar respectively by mould;
3) adopt cold extrusion press, carry out reducing by mould and handle;
4) adopt cold extrusion press, by the mould extrusion modling.
2, according to the preliminary forming method of cold extrusion of the described plunger of claim 1, oil nozzle, delivery valve, it is characterized in that the procedure of processing of described bearing steel is: first wire drawing, give tempering, phosphatization again, last saponification.
3,, it is characterized in that described bearing steel hardness HBW is 187～195 according to the preliminary forming method of cold extrusion of the described plunger of claim 1, oil nozzle, delivery valve.
4,, it is characterized in that being the dish round steel before described bearing steel is cut off according to the preliminary forming method of cold extrusion of claim 1 or 2 or 3 described plungers, oil nozzle, delivery valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034370A CN101648226A (en) | 2009-08-25 | 2009-08-25 | Cold extrusion preliminary forming method for plunger, oil nozzle and oil outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034370A CN101648226A (en) | 2009-08-25 | 2009-08-25 | Cold extrusion preliminary forming method for plunger, oil nozzle and oil outlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101648226A true CN101648226A (en) | 2010-02-17 |
Family
ID=41670614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910034370A Pending CN101648226A (en) | 2009-08-25 | 2009-08-25 | Cold extrusion preliminary forming method for plunger, oil nozzle and oil outlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101648226A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378632A (en) * | 2016-10-19 | 2017-02-08 | 扬州星月燃油喷射有限公司 | Precise forming mechanism of oil pump oil mouth plunger sleeve |
-
2009
- 2009-08-25 CN CN200910034370A patent/CN101648226A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378632A (en) * | 2016-10-19 | 2017-02-08 | 扬州星月燃油喷射有限公司 | Precise forming mechanism of oil pump oil mouth plunger sleeve |
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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 |
Open date: 20100217 |