CN102182579A - Forming method of steel piston internally-cooled oil channel - Google Patents
Forming method of steel piston internally-cooled oil channel Download PDFInfo
- Publication number
- CN102182579A CN102182579A CN2011100882183A CN201110088218A CN102182579A CN 102182579 A CN102182579 A CN 102182579A CN 2011100882183 A CN2011100882183 A CN 2011100882183A CN 201110088218 A CN201110088218 A CN 201110088218A CN 102182579 A CN102182579 A CN 102182579A
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- China
- Prior art keywords
- piston
- internally
- oil channel
- cooled oil
- skirt
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- 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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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
- F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
Abstract
The invention provides a forming method of a steel piston internally-cooled oil channel. The forming method comprises the following steps: (1) first dividing the steel piston into a piston head and a piston skirt, and respectively performing machining on the piston head and the piston skirt to obtain the semi-finished products, wherein the shape of internally-cooled oil channel above the piston head and the piston skirt as well as an oil inlet and an oil outlet can be processed to the finished size with a margin of 1.5-4mm in height; (2) then carrying out friction welding on the piston head and the piston skirt to form into a whole to obtain the formed whole internally-cooled oil channel, and performing other processes on the piston. The method provided by the invention breaks the routines, the piston is divided into the piston head and the piston skirt, so one part of the internally-cooled oil channel is arranged in the piston head and the other part of the internally-cooled oil channel is arranged in the piston skirt, thus forming the whole internally-cooled oil channel by welding. The method has high production efficiency and is simple; meanwhile, the formed internally-cooled oil channel has high precise dimension and the piston matrix of the internally-cooled oil channel has high strength.
Description
Technical field
The present invention relates to the mould-forming method in the interior cold oil road of steel pistons.Be suitable for the automobile-used and marine engine steel pistons of high-power high load.
Background technique
Along with the enforcement of the Abgasgesetz of the development of modern diesel engine and requirements at the higher level, the pressure of explosion of diesel engine improves gradually.Traditional all-aluminium piston is after the application of having experienced Europe III, the discharging of Europe IV, and the lifting of piston intensity has faced bottleneck, realizes that in order to adapt to Europe V, Europe VI discharging engine flare boost in pressure to the demand more than the 20MPa, need to use steel pistons.
When the high-power high load engine adopts steel pistons substitution of Al piston with piston,, need to adopt special method to be shaped, to satisfy piston structure and performance requirement for the steel pistons that interior cooling oil duct is arranged.The method of adopt casting usually, forging forms, and there is subsurface defect easily in the formation technique complexity.
Summary of the invention
For fear of the interior cold oil road formation technique complicated problems of steel pistons, the present invention proposes the mould-forming method in cold oil road in a kind of steel pistons.
Technological scheme of the present invention is: the mould-forming method in cold oil road in a kind of steel pistons, concrete steps are as follows: (1), at first steel pistons is divided into piston crown and piston skirt, piston crown and piston skirt are machined to semi-finished product respectively, wherein interior cold oil road shape and the oil inlet and outlet on piston crown and the piston skirt is machined to finished size, and short transverse is stayed 1.5 to 4mm surplus; (2), then, be one with piston crown and piston skirt friction welding, complete interior cold oil road promptly is shaped, and then piston is carried out all the other processing.
The invention has the beneficial effects as follows: the present invention's thinking of breaking the normal procedure, steel pistons is divided into head and skirt section, the part in interior cold oil road is at head, and the another part in interior cold oil road is finished complete interior cold oil road by welding and is shaped in the skirt section.Manufacturing efficiency height of the present invention, method are simple; Interior cold oil road size precision height after the shaping, the intensity height of place, interior cold oil road piston matrix.
Description of drawings
Fig. 1 is the structural drawing of piston head.
Fig. 2 is the structural drawing of piston skirt.
Fig. 3 is the friction welding schematic representation.
Fig. 4 is the schematic representation that piston head and piston skirt are welded as a whole.
Embodiment
Embodiment: (1), at first steel pistons is divided into piston crown 1 and piston skirt 2, steel pistons head blank is machined to piston crown shown in Figure 11, interior cold oil road A is arranged on the piston crown 1, shape and the oil inlet and outlet of interior cold oil road A are machined to finished size, and interior cold oil road A short transverse is stayed 1.5 to 4mm surplus; Simultaneously steel pistons skirt section blank is machined to piston skirt shown in Figure 22, interior cold oil road B is arranged on the piston skirt 2, shape and the oil inlet and outlet of interior cold oil road B are machined to finished size, and interior cold oil road B short transverse is stayed 1.5 to 4mm surplus; (2), then piston crown 1 and piston skirt 2 are contained on the friction-welding machine, piston crown and piston skirt friction welding are one, and complete interior cold oil road promptly is shaped; The principle of friction welding as shown in Figure 3; Be as shown in Figure 4 complete interior cold oil road C signal and in the signal of weld seam 3 on the cold oil road, the surplus of reserving on the short transverse of interior cold oil road A and interior cold oil road B is consumed in the process of friction welding, and the height of complete interior cold oil road C reaches finished size.
Claims (1)
1. the mould-forming method in cold oil road in the steel pistons, concrete steps are as follows: (1), at first steel pistons is divided into piston crown and piston skirt, piston crown and piston skirt are machined to semi-finished product respectively, wherein interior cold oil road shape and the oil inlet and outlet on piston crown and the piston skirt is machined to finished size, and short transverse is stayed 1.5 to 4mm surplus; (2), then, be one with piston crown and piston skirt friction welding, complete interior cold oil road promptly is shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100882183A CN102182579A (en) | 2011-04-09 | 2011-04-09 | Forming method of steel piston internally-cooled oil channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100882183A CN102182579A (en) | 2011-04-09 | 2011-04-09 | Forming method of steel piston internally-cooled oil channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102182579A true CN102182579A (en) | 2011-09-14 |
Family
ID=44568852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100882183A Pending CN102182579A (en) | 2011-04-09 | 2011-04-09 | Forming method of steel piston internally-cooled oil channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102182579A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174537A (en) * | 2013-03-29 | 2013-06-26 | 东风活塞轴瓦有限公司 | Machining method of friction welding of forged steel piston |
| CN109382637A (en) * | 2017-08-09 | 2019-02-26 | 武汉华材表面科技有限公司 | A kind of all-steel piston manufacturing method comprising built-in cooling oil duct |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428330A (en) * | 1982-09-08 | 1984-01-31 | Kabushiki Kaisha Komatsu Seisakusho | Piston for internal combustion engines |
| US20020189442A1 (en) * | 1999-10-08 | 2002-12-19 | Xilou Zhu | Dual gallery piston |
| CN1944994A (en) * | 2005-10-08 | 2007-04-11 | 山东滨州渤海活塞股份有限公司 | Welded forged steel integrated piston and its producing method |
| CN101092914A (en) * | 2007-07-20 | 2007-12-26 | 山东滨州渤海活塞股份有限公司 | Welding type single piece piston in forged steel with close internal cooling oil pocket and fabricating method |
-
2011
- 2011-04-09 CN CN2011100882183A patent/CN102182579A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428330A (en) * | 1982-09-08 | 1984-01-31 | Kabushiki Kaisha Komatsu Seisakusho | Piston for internal combustion engines |
| US20020189442A1 (en) * | 1999-10-08 | 2002-12-19 | Xilou Zhu | Dual gallery piston |
| CN1944994A (en) * | 2005-10-08 | 2007-04-11 | 山东滨州渤海活塞股份有限公司 | Welded forged steel integrated piston and its producing method |
| CN101092914A (en) * | 2007-07-20 | 2007-12-26 | 山东滨州渤海活塞股份有限公司 | Welding type single piece piston in forged steel with close internal cooling oil pocket and fabricating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174537A (en) * | 2013-03-29 | 2013-06-26 | 东风活塞轴瓦有限公司 | Machining method of friction welding of forged steel piston |
| CN109382637A (en) * | 2017-08-09 | 2019-02-26 | 武汉华材表面科技有限公司 | A kind of all-steel piston manufacturing method comprising built-in cooling oil duct |
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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: 20110914 |