CN2851607Y - Welding type forged steel single-piece piston - Google Patents
Welding type forged steel single-piece piston Download PDFInfo
- Publication number
- CN2851607Y CN2851607Y CN 200520087667 CN200520087667U CN2851607Y CN 2851607 Y CN2851607 Y CN 2851607Y CN 200520087667 CN200520087667 CN 200520087667 CN 200520087667 U CN200520087667 U CN 200520087667U CN 2851607 Y CN2851607 Y CN 2851607Y
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- China
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- piston
- skirt
- forged
- oil
- cooling oil
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- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model provides a welding forged steel integral piston, which belongs to an engine piston. The engine piston is provided with a forged head and a forged skirt which are welded and fixed into a piston body. Between a ring groove and a burning chamber, the piston body is provided with a cooling oil chamber communicated with the inner cavity of the piston body through an oil inlet/outlet. The skirt below the ring groove is provided with an annular groove. Compared with an integrally forged piston, the piston has better manufacturability, particularly simplified processes for forging piston blanks and forming the cooling oil cavity, simpler fabrication and smaller residual stress of the blank. Due to the closing cooling oil cavity formed by welding, the integral structure rigidity of the piston is increased. The annular groove above the piston skirt is communicated with the inner cavity of the piston in the long axis direction, which lightens the weight of the piston body, helps engine oil return to the position of the oil ring groove, simultaneously increases the flexibility of the skirt and helps to reduce cylinder matching gaps and lower engine oil consumption.
Description
Technical field
The utility model provides a kind of piston that is used for motor, especially a kind of forged steel piston.
Background technique
At present, truck, engineering machinery, railway locomotive and motor peculiar to vessel are all developing to high-power, high load direction, and reinforcing degree improves constantly, and emission request is more and more stricter.Though aluminum piston has lightweight advantage, can not satisfy the requirement of motor high power, high reinforcement, low emission gradually.For satisfying this requirement, the someone designs a kind of piston of hinged pendulum mass formula structure, and promptly piston crown and skirt section separate machined are made, and couples together by wrist pin, and piston crown adopts cast iron or forged steel material, and the aluminium material manufacturing is adopted in the skirt section.This piston has increased processing cost, and has been difficult to form the cooling oil pocket of sealing because head separates manufacturing with the skirt section, and the piston cooling effect is poor, because need longer wrist pin to connect, overall weight also increases to some extent.The Chinese patent application of publication number CN1610601A discloses a kind of method of making one-piece piston.This method is forged the piston blank integral type, and inner-cooling oil recess is formed oil closed cavity with the annular chamber groove that a ring cowling and head process.The formation complex process of the forging of piston blank, oil closed cavity, structure of piston intensity is lower.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of welded forged steel integrated piston, to simplify the piston blank processing technology, the integrally-built rigidity of raising piston.
The utility model is to realize like this, welded forged steel integrated piston, it has head that forges and the skirt section of forging, head and skirt section welding are fixed into piston only, the cooling oil pocket is arranged on the piston only between annular groove and the firing chamber, the cooling oil pocket communicates with the piston only inner chamber by the turnover oilhole, on the skirt section of annular groove below circular groove is arranged.
Adopt the welded forged steel integrated piston of said structure, owing to weld together after forge respectively in the head of piston and skirt section, compare good manufacturability with the piston of solid forging, the formation work simplification of the especially forging of piston blank, sealing cooling oil pocket, processing is simple, and the residual stress of blank is little.Form sealing cooling oil pocket owing to pass through welding, make the hot distortion down of piston overall structure rigidity increase, particularly annular groove position less.Circular groove above the piston skirt, on long axis direction, communicate, not only alleviated the weight of piston only, and help the machine oil oil return of oil ring groove position with piston cavity, increase the skirt section flexibility simultaneously, helped the reduction with the machine oil oil consumption of reducing of cylinder prepareding gap.This piston can replace the piston of aluminum piston and hinging structure, when having lighter weight, has higher intensity again, has satisfied the reinforcement requirement of high load engine.
Description of drawings
Fig. 1 is the main pseudosection of the utility model structure.
Fig. 2 is the left pseudosection of Fig. 1.
Fig. 3 is the schematic perspective view of the utility model structure.
Fig. 4 is the schematic representation of the structure after the roughing of head blank.
Fig. 5 is the schematic representation of the structure after the blank roughing of skirt section.
Embodiment
The embodiment who provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model and manufacture method.
As shown in drawings, the welded forged steel integrated piston of the utility model, it has head (1) that forges and the skirt section of forging (6), head and skirt section welding are fixed into piston only, on the piston only between annular groove (9) and firing chamber (2) cooling oil pocket (3) is arranged, the cooling oil pocket communicates with the piston only inner chamber by turnover oilhole (8), on the skirt section of annular groove below circular groove (7) is arranged.
Described head (1) welds together by the face of weld (4) of below, firing chamber, the face of weld (10) in the middle of the two adjacent annular grooves with skirt section (6), and the face of weld (10) in the middle of the two adjacent annular grooves is higher than the face of weld (4) of below, firing chamber.
The production stage and the method for the welded forged steel integrated piston of the utility model are to forge head, the skirt section blank of piston respectively; Respectively head blank and skirt section blank are heat-treated; Respectively piston crown blank and skirt section blank are carried out roughing, process inner chamber, inner-cooling oil recess and welding end surface, thereby process head blank (11) as shown in Figure 4, skirt section blank (12) shown in Figure 5; With head blank and skirt section blank together by friction welding; Process circular groove (7), firing chamber (2), annular groove (9), pin-and-hole (5), cylindrical and the turnover oilhole positions such as (8) of piston respectively; Piston face is carried out phosphatization or graphitization processing.
Piston crown, skirt section are forged by forgeable Hardened And Tempered Steel or non-hardened and tempered steel and are made.
Dodge the oil nozzle of installing on the engine body as need,, can design a breach in the lower end, piston skirt, when preventing that piston motion from arriving lower dead center and oil nozzle interfere.
Accompanying drawing of the present utility model has only been represented its a kind of embodiment, and concrete shape, structure, size can be made variation and adjustment under the situation that does not break away from the utility model spirit and scope.
Claims (2)
1, welded forged steel integrated piston, it is characterized in that, it has head (1) that forges and the skirt section of forging (6), head and skirt section welding are fixed into piston only, on the piston only between annular groove (9) and firing chamber (2) cooling oil pocket (3) is arranged, the cooling oil pocket communicates with the piston only inner chamber by turnover oilhole (8), on the skirt section of annular groove below circular groove (7) is arranged.
2, welded forged steel integrated piston as claimed in claim 1, it is characterized in that, described head (1) welds together by the face of weld (4) of below, firing chamber, the face of weld (10) in the middle of the two adjacent annular grooves with skirt section (6), and the face of weld (10) in the middle of the two adjacent annular grooves is higher than the face of weld (4) of below, firing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087667 CN2851607Y (en) | 2005-10-08 | 2005-10-08 | Welding type forged steel single-piece piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087667 CN2851607Y (en) | 2005-10-08 | 2005-10-08 | Welding type forged steel single-piece piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2851607Y true CN2851607Y (en) | 2006-12-27 |
Family
ID=37585564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520087667 Expired - Fee Related CN2851607Y (en) | 2005-10-08 | 2005-10-08 | Welding type forged steel single-piece piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2851607Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893005A (en) * | 2010-02-17 | 2013-01-23 | 马勒国际有限公司 | Piston assembly |
| CN104625659A (en) * | 2014-12-12 | 2015-05-20 | 中国兵器科学研究院宁波分院 | Manufacturing method of electron beam welding aluminum piston |
| CN105804883A (en) * | 2016-04-25 | 2016-07-27 | 沈阳和世泰钛金属应用技术有限公司 | Titanium piston |
| CN112302828A (en) * | 2020-11-26 | 2021-02-02 | 滨州东海龙活塞有限公司 | Large-cylinder-diameter integral forged steel piston |
-
2005
- 2005-10-08 CN CN 200520087667 patent/CN2851607Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893005A (en) * | 2010-02-17 | 2013-01-23 | 马勒国际有限公司 | Piston assembly |
| CN104625659A (en) * | 2014-12-12 | 2015-05-20 | 中国兵器科学研究院宁波分院 | Manufacturing method of electron beam welding aluminum piston |
| CN105804883A (en) * | 2016-04-25 | 2016-07-27 | 沈阳和世泰钛金属应用技术有限公司 | Titanium piston |
| CN112302828A (en) * | 2020-11-26 | 2021-02-02 | 滨州东海龙活塞有限公司 | Large-cylinder-diameter integral forged steel piston |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |