CN1223416C - Cold stamping processing method for piston of diesel engine oil delivery pump - Google Patents
Cold stamping processing method for piston of diesel engine oil delivery pump Download PDFInfo
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- CN1223416C CN1223416C CN 02113089 CN02113089A CN1223416C CN 1223416 C CN1223416 C CN 1223416C CN 02113089 CN02113089 CN 02113089 CN 02113089 A CN02113089 A CN 02113089A CN 1223416 C CN1223416 C CN 1223416C
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- diesel engine
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- 238000003672 processing method Methods 0.000 title description 3
- 239000010710 diesel engine oil Substances 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 15
- 239000000047 product Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000011265 semifinished product Substances 0.000 claims abstract description 6
- 238000007514 turning Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000003490 calendering Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 238000004513 sizing Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000004080 punching Methods 0.000 abstract description 3
- 230000002860 competitive effect Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 4
- 238000007630 basic procedure Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012358 sourcing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Pistons, Piston Rings, And Cylinders (AREA)
- Forging (AREA)
Abstract
The invention discloses a cold stamping method for a piston for an oil delivery pump of a diesel engine, and belongs to the technical field of oil delivery pump part processing. The method comprises the steps of punching a metal plate into round sheet materials, punching the metal round sheet materials into a barrel shape, reversely extending a barrel-shaped semi-finished product, and finally manufacturing a piston finished product with a concave-shaped section. The invention departs from the traditional processing mode, adopts non-cutting processing, not only greatly reduces the material loss, but also greatly improves the processing speed, thereby greatly improving the production efficiency and obviously reducing the manufacturing cost, and compared with the cutting processing, the consistency of the product is better, so the invention is more popular with part purchasing manufacturers and has more obvious competitive advantage.
Description
Technical field
The present invention relates to a kind of processing method for stamping, especially a kind of cold stamping method for making piston belongs to oil transfer pump part processing technical field.
Background technology
Piston is the core part (referring to Fig. 1) of oil pump of diesel motor, and its workmanship directly has influence on the characteristic working curve of oil transfer pump.Present domestic manufacturing firm is more, Market competition.For a long time, the method for machining is adopted in the manufacturing of this part all the time, promptly uses metal bar material, through work step and operations such as turning, boring endoporus, heat treatment, cylindrical grindings, makes the part that meets the design drawing requirement.This traditional processing method expense material is taken a lot of work the manufacturing cost height.
Summary of the invention
The objective of the invention is to: the oil transmitting pump of diesel engine piston that proposes a kind of material-saving saving of labor does not have the cutting cold stamping method for making, thereby under the prerequisite that guarantees crudy, enhances productivity, and reduces manufacturing cost, makes this product have the stronger market competitiveness.
In order to reach above purpose, the most basic procedure of processing of cold stamping method for making piston use in oil transmitting pump of diesel engine of the present invention is:
A. blanking---sheet metal is die-cut into the disk material;
B. extend---tubbiness is made in the punching press of round metal sheet stock;
C. oppositely extend---the tubbiness semi-finished product are oppositely extended, make the piston finished product that the cross section is " recessed " shape.
The present invention has not only jumped out traditional cooked mode when this finished product of processing tubbiness, adopt the method for punch process to be shaped, but also created the further processing step of oppositely extending, thereby make whole process not have cuttingization, the result has not only reduced spillage of material significantly, and process velocity improves greatly, therefore can greatly enhance productivity, obviously reduce manufacturing cost, and compare with machining, consistency of product is better, therefore will more be subjected to the welcome of part sourcing producer, has more tangible competitive advantage.
Description of drawings
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing.
Fig. 1 is the design of part schematic diagram of the embodiment of the invention.
Fig. 2 is the artwork corresponding with embodiment of the invention procedure of processing.
The specific embodiment
Embodiment
The present embodiment cold stamping method for making piston use in oil transmitting pump of diesel engine finally need be made piston finished product shown in Figure 1.Grope through testing repeatedly, determined following processing step:
The most basic procedure of processing is:
A. blanking is extended---and adopting the blanking compound die of extending, is that 1.5 millimeters No. 20 steel plates are die-cut into the disk material with thickness, and calendering is simultaneously made the degree of depth shown in Fig. 2 (a) and equaled the shallow straight tubbiness that finished product, diameter are about 1.3 times of finished products substantially, and work efficiency is higher like this;
B. secondary is extended---and adopt the secondary mould of extending, further roll into diameter shown in Fig. 2 (b) and equal finished diameter, the degree of depth substantially, can avoid crackle like this greater than finished diameter, the dark directly tubbiness deepened naturally;
C. the straight bucket of rough turn end face---Che Qushen end face burr make its degree of depth be about 1.05 times of diameter, referring to Fig. 2 (C);
D, destressing handle---and be heated to 300-350 ℃, be incubated about 1.5-2.5 hour, the removal internal stress can make like this and follow-up oppositely extend more smoothly, can avoid crackle;
E, oppositely extend---with the mould of oppositely extending, straight tubbiness semi-finished product are oppositely extended, make its cross section be " recessed " shape, shown in Fig. 2 (D);
F, shaping---by sizing die compacting " recessed " tee section semi-finished product, make its interior appearance and size reach designing requirement;
G, finish turning end face---finish turning end face makes depth dimensions reach the drawing requirement;
H, heat treatment---quenching reaches HRC36-41;
I, surface treatment---oxidation.
The concrete dimensional parameters of above process is referring to Fig. 2.Experimental results show that, it is thorough that the processing step of present embodiment is considered, all linked with one another, practical, the piston use in oil transmitting pump of diesel engine fiber properties that adopts the present embodiment process to process is splendid, 1.5 millimeters when therefore the part wall thickness is by machining are reduced to through 1.2 millimeters of the parts after extending, still have desirable intensity and rigidity.
Working (machining) efficiency improves greatly, and the uniformity of part is better, and resultant costs is more economical, quality is more secure, thereby has more the market competitiveness.
In addition to the implementation and since piston use in oil transmitting pump of diesel engine also have other many in specifications, and material also can change, so the present invention can also have other embodiments.The basic procedure of processing of all employing the present invention all will drop in the desired protection domain.
Claims (1)
1. cold stamping method for making piston use in oil transmitting pump of diesel engine is characterized in that procedure of processing is:
A. blanking is extended---and adopting the blanking compound die of extending, is that 1.5 millimeters No. 20 steel plates are die-cut into the disk material with thickness, and calendering simultaneously makes that the degree of depth equals finished product, diameter is the shallow straight tubbiness of 1.3 times of finished products;
B. secondary is extended---and adopt the secondary mould of extending, further roll into diameter and equal finished diameter, the degree of depth greater than finished diameter, the dark directly tubbiness deepened naturally;
C. the straight bucket of rough turn end face---Che Qushen end face burr, making its degree of depth is 1.05 times of diameter;
D, destressing are handled---and be heated to 300-350 ℃, be incubated 1.5-2.5 hour, remove internal stress;
E, oppositely extend---with the mould of oppositely extending, straight tubbiness semi-finished product are oppositely extended, make its cross section be " recessed " shape;
F, shaping---by sizing die compacting " recessed " tee section semi-finished product, make its interior appearance and size reach the drawing requirement;
G, finish turning end face---finish turning end face makes depth dimensions reach the drawing requirement;
H, heat treatment---quenching reaches HRC36-41;
I, surface treatment---oxidation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113089 CN1223416C (en) | 2002-06-03 | 2002-06-03 | Cold stamping processing method for piston of diesel engine oil delivery pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113089 CN1223416C (en) | 2002-06-03 | 2002-06-03 | Cold stamping processing method for piston of diesel engine oil delivery pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1465454A CN1465454A (en) | 2004-01-07 |
| CN1223416C true CN1223416C (en) | 2005-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02113089 Expired - Fee Related CN1223416C (en) | 2002-06-03 | 2002-06-03 | Cold stamping processing method for piston of diesel engine oil delivery pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN1223416C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006063608A1 (en) * | 2004-12-16 | 2006-06-22 | Cdp Bharat Forge Gmbh | Method for producing rotationally symmetrical, undercut contours |
| CN101434022A (en) * | 2008-12-12 | 2009-05-20 | 曾能君 | Cold punching processing method for gear face oil groove |
| CN101700549B (en) * | 2009-08-27 | 2013-01-09 | 四川宁江山川机械有限责任公司 | Molding process of spring plate of shock absorber and anti-drawing molding die |
| WO2012026515A1 (en) * | 2010-08-27 | 2012-03-01 | 株式会社エフ・シー・シー | Method for forming undercut and method for manufacturing molded article having undercut |
| CN105081070A (en) * | 2014-05-07 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Method for forming high inner flange of lip component in reverse drawing manner |
| CN109746361A (en) * | 2019-02-01 | 2019-05-14 | 华南理工大学 | A kind of metal plate engine piston room temperature near net plastic molding method |
| CN110038995B (en) * | 2019-04-11 | 2020-11-03 | 柳州市龙杰汽车配件有限责任公司 | Multi-station forming process for driven pulley piston of CVT (continuously variable transmission) |
| CN111085615A (en) * | 2019-12-04 | 2020-05-01 | 北京动力机械研究所 | Forming die and forming process for high-temperature alloy small-inner-diameter annular deep groove component |
| CN115415753A (en) * | 2022-10-05 | 2022-12-02 | 江苏玖通印刷有限责任公司 | Part precision machining control method |
-
2002
- 2002-06-03 CN CN 02113089 patent/CN1223416C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1465454A (en) | 2004-01-07 |
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