CN101793205A - Novel laser welding piston with forged steel structure - Google Patents
Novel laser welding piston with forged steel structure Download PDFInfo
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- CN101793205A CN101793205A CN 201010134820 CN201010134820A CN101793205A CN 101793205 A CN101793205 A CN 101793205A CN 201010134820 CN201010134820 CN 201010134820 CN 201010134820 A CN201010134820 A CN 201010134820A CN 101793205 A CN101793205 A CN 101793205A
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Abstract
The invention relates to a novel laser welding piston with a forged steel structure. The piston comprises a forged piston ring body and a piston body, wherein the piston ring body and the piston body are welded by laser; a closed cooling oil chamber is formed between the piston ring body and the piston body and is communicated with the external through an oil inlet hole and an oil outlet hole; the lower part of the piston ring body is provided with an oil ring groove; the piston body corresponding to the position of the oil ring groove is provided with an annular groove; a girdle band is arranged between the oil ring groove and the annular groove; the girdle band is provided with a plurality of oil return holes communicating the oil ring groove and the annular groove; or the lower side of the oil ring groove is provided with a plurality of level oil return blind holes. The piston reduces weight of the piston, and increases flexibility of the piston body; and the oil return holes or the level oil return blind holes are favorable for back flow of machine oil of the oil ring groove, particularly the machine oil at the bottom of the oil ring groove so as to prevent the spilling of the machine oil caused by high pressure of the machine oil, and contribute to reducing machine oil consumption and harmful emissions of motors.
Description
Technical field
The present invention relates to a kind of piston, especially a kind of novel laser welding piston with forged steel structure.
Background technique
In recent ten years, engine design, manufacturing technology are able to rapid raising, particularly diesel engine is all developing to high-power, high load direction, reinforcing degree improves constantly, pressure of explosion has surpassed 20MPa, emission request is more and more stricter simultaneously, though primary aluminum matter piston has lightweight advantage, aluminium material can not satisfy the requirement of motor high power, high reinforcement, low emission gradually.For this reason, both at home and abroad the plunger designs MANUFACTURER is devoted to design and develop the novel piston that not only has high reliability but also can satisfy economical and emission request, as the pendulum mass formula hinging structure piston of liquid die forging ceramic fiber structure aluminium piston, steel top aluminium apron structure, cast-iron piston etc., all there are various shortcomings in above structural design, the blank moulding process is required high as liquid die forging ceramic fiber structure aluminium piston, ceramic fiber structure particularly, must be under high pressure could moulding; Pendulum mass formula hinging structure its piston head of piston and piston skirt separate machined are made, and couple together piston head forged steel material by wrist pin, piston skirt adopts the aluminium material manufacturing, because piston head separates manufacturing with piston skirt, increased processing cost, and be difficult to form the cooling oil pocket of sealing, the piston cooling effect is poor, because need longer wrist pin to connect, overall weight also increases to some extent simultaneously, and cast-iron piston is in manufacture process, environment is polluted, and the inner-cooling oil recess structure also is difficult to realize.
Chinese patent ZL02823630.0 discloses a kind of closed gallery monobloc piston with drain pan, a plurality of piston ring grooves that this piston head has the combustion cup on a surface formed thereon and forms on the outer surface of an endless belt.Form a machine oil cooling chamber in piston head, this cooling chamber is to be limited by the wall of combustion cup and endless belt.This piston has piston skirt combination, Immobile, and this piston skirt is set as and becomes whole with the wrist pin boss and be fixed to ring belt in the top.Piston ring is placed in each piston ring groove, and simultaneously piston head also is provided with a drain pan, this groove be arranged on minimum annular groove below.This structure though control is played a role to the machine oil of cylinder sleeve, piston ring and piston space, but has a considerable amount of machine oil up and walk around and scurry on the compression ring to the firing chamber, causes the consumption of lubricating oil height, is unfavorable for emission control.
Chinese patent ZL200520087667.6 discloses a kind of welded forged steel integrated piston, and it fixedly becomes piston only by welding by piston ring body that forges and piston only after processing; Piston only between annular groove and firing chamber forms sealing cooling oil pocket, and the cooling oil pocket passes through into and out of oilhole and exterior; Below annular groove, the piston only top is processed with circular groove.This patent does not also propose clear and definite structural scheme to the control or the reduction of consumption of lubricating oil.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of simple in structure, reduction engine oil consumption is provided, reduce the novel laser welding piston with forged steel structure of motor noxious emission.
For achieving the above object, the present invention adopts following technical proposals:
A kind of novel laser welding piston with forged steel structure, it comprises piston ring body and the piston only that forges; Piston ring body and piston only and laser bonding moulding; Be the cooling oil pocket of sealing between piston ring body and piston only, the cooling oil pocket passes through into and out of oilhole and exterior; Be provided with oil ring groove in piston ring body bottom, the place is provided with circular groove with oil ring groove position corresponding piston body, is provided with endless belt between described oil ring groove and circular groove, and the spill port of some connection oil ring grooves and circular groove is set on the endless belt.
A kind of novel laser welding piston with forged steel structure, it comprises piston ring body and the piston only that forges; Piston ring body and piston only and laser bonding moulding; Be the cooling oil pocket of sealing between piston ring body and piston only, the cooling oil pocket passes through into and out of oilhole and exterior; Be provided with oil ring groove in piston ring body bottom, the place is provided with circular groove with oil ring groove position corresponding piston body, and several horizontal oil return blind holes are set on the downside of described oil ring groove.
Described piston ring body is connected with crossing the welding zone and cooperating to distinguish with piston only, and described welding zone is positioned at the piston ring body and the piston only contacting point on cooling oil pocket top, and the welding zone is a cylndrical surface; Described cooperation district is positioned at the piston ring body and the piston only contacting point of cooling oil pocket lower side, and cooperating the district is a ladder surface or profile of tooth Surface of action.
Described piston ring body is connected with crossing the welding zone and cooperating to distinguish with piston only, described welding zone is positioned at the piston ring body and the piston only contacting point of cooling oil pocket side, the welding zone is a toroidal surface, described cooperation district is positioned at the piston ring body and the piston only contacting point of cooling oil pocket lower side, and cooperating the district is a ladder surface or profile of tooth Surface of action.
Described piston only bottom is an inner chamber, and is provided with pin-and-hole, and circular groove does not communicate with piston cavity; Perhaps communicate with piston cavity in vertical pin-and-hole direction.
The diameter of described endless belt is less than cylinder hole 0.8-3.5mm.
The axial direction of described spill port is parallel with the piston center line.
Described horizontal oil return blind hole center line is on the oil ring groove downside or be higher than the oil ring groove downside, and the axial direction of this oil return blind hole is vertical with the piston center line.
Also be provided with several compressions on the described piston ring body.
The present invention adopts said structure, after piston ring body and piston only forge processing respectively, the piston ring body is at first combined with cooperating to distinguish by the welding zone with piston only, use laser to be welded in the welding zone welding fabrication then by being welded into one, and formation sealing cooling oil pocket, the formation work simplification of cooling oil pocket makes the hot distortion down of piston overall structure rigidity increase, particularly piston ring body region little.The following piston only of oil ring groove top processes circular groove, between oil ring groove and circular groove, form the thinner endless belt of a diameter, the diameter of endless belt generally reduces 0.8-3.5mm than cylinder bore dia, by spill port oil ring groove and circular groove are connected, not only alleviate weight, increased the piston only flexibility, and helped the machine oil oil return of oil ring groove position, particularly the machine oil of oil ring groove bottom directly is back in the circular groove by spill port; Or the oil return blind hole by the oil ring groove side, be back in the circular groove through the thinner endless belt of oil ring groove downside diameter, prevent to help reducing engine oil consumption because the engine oil pressure height causes scurrying on the machine oil, reduce the noxious emission of motor.
The invention has the beneficial effects as follows: simple in structure, easy to use, cost is low, pollutes few.
Description of drawings
Fig. 1 is the main pseudosection of structure of the present invention;
Fig. 2 is the left pseudosection of Fig. 1;
Fig. 3 is a schematic perspective view of the present invention.
1. piston ring bodies wherein, 2. firing chamber, 3. welding zone, 4. oil ring groove, 5. spill port, 6. cooling oil pocket, 7. piston only, 8. pin-and-hole, 9. circular groove 10. cooperates the district, 11. compressions, 12. into and out of oilhole 13. circular grooves, 14. inner chambers, 15. oil return blind holes.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1:
As accompanying drawing 1, shown in Figure 2, novel laser welding piston with forged steel structure, it comprises the piston ring body that forges 1 and piston only 7, and piston ring body 1 and piston only 7 are at first by welding zone 3 with cooperates district 10 to combine, and use laser passes through welding zone 3 welding fabrications; Be processed to form firing chamber 2 on piston only 7 tops, piston ring body 1 cylindrical is processed to form annular groove (comprise the oil ring groove 4 of bottom and top several compression 11), and the cooling oil pocket 6 of formation sealing between annular groove and firing chamber 2, cooling oil pocket 6 is by communicating with outside or inner chamber 14 into and out of oilhole 12, piston only 7 sides and position, piston ring body 1 contacting point are processed with circular groove 9,9 of oil ring groove 4 and circular grooves are provided with endless belt, be provided with some dagger-axe spill ports 5 on endless belt, oil ring groove 4 communicates by spill port 5 with circular groove 9.
Welding zone 3 is positioned at the piston ring body 1 and piston only 7 contacting points on cooling oil pocket 6 tops, and the welding zone is a cylndrical surface; Perhaps according to different welding procedures, the welding zone is positioned at the piston ring body 1 and piston only 7 contacting points of cooling oil pocket 6 sides, welding zone 3 is a toroidal surface, and it is as a whole that piston only 7 and piston ring body 1 are welded into, and the annular solder face of this structure annular groove can suitably move down.
Cooperate district 10 between cooling oil pocket 6 and annular groove, cooperate district 10 to be designed to a ladder structure or profile of tooth meshing engagement structure, this structure also can be designed to other structure according to arts demand and designing requirement, mainly is can seal cooling oil pocket 6 to get final product.
Production stage of the present invention and method are to forge piston ring body 1 blank, piston only 7 blanks respectively; Respectively piston ring body 1 blank and piston only 7 blanks are heat-treated; Respectively piston ring body 1 blank and piston only 7 blanks are carried out roughing, process cooling oil pocket 6 and welding end surface and counterface, then piston ring body 1 and piston only 7 are assembled into as a wholely by welding end surface and counterface, make it into the welding end surface welding as a whole with laser beam welding at last; Process firing chamber 2 then respectively, annular groove (oil ring groove 4, compression 11) is into and out of oilhole 12, circular groove 9, positions such as spill port 5, pin-and-hole 8; At last piston face is carried out surface treatments such as phosphatization or graphitizing.
Piston ring body 1, piston only 7 are made by forgeable steel.
The laser bonding welding fabrication is adopted in welding.
Embodiment 2:
In the present embodiment, also can design some oil return blind holes 15, oil return blind hole 15 is arranged on the downside of oil ring groove 4 oil return blind hole 15 center lines on oil ring groove 4 downsides or be higher than oil ring groove 14 downsides, and the axial direction of this oil return blind hole 15 is vertical with the piston center line.The oil ring groove 4 positions particularly machine oil of bottom are back in the circular groove 9 through the oil return blind hole 15 and the thinner endless belt of diameter of oil ring groove 4 downsides.All the other are identical with embodiment 1, repeat no more.
Embodiment 3:
As different from Example 1: below piston ring groove, the circular groove 9 of piston only 7 tops processing communicates with piston cavity 14 in vertical pin-and-hole 8 directions.
All the other are identical with embodiment 1, do not repeat them here.
Claims (9)
1. novel laser welding piston with forged steel structure, it comprises piston ring body and the piston only that forges; Piston ring body and piston only and laser bonding moulding; Be the cooling oil pocket of sealing between piston ring body and piston only, the cooling oil pocket is by communicating with outside or inner chamber into and out of oilhole; Be provided with oil ring groove in piston ring body bottom, the place is provided with circular groove with oil ring groove position corresponding piston body, it is characterized in that, is provided with endless belt between described oil ring groove and circular groove, and the spill port of some connection oil ring grooves and circular groove is set on the endless belt.
2. novel laser welding piston with forged steel structure, it comprises piston ring body and the piston only that forges; Piston ring body and piston only and laser bonding moulding; Be the cooling oil pocket of sealing between piston ring body and piston only, the cooling oil pocket is by communicating with outside or inner chamber into and out of oilhole; Be provided with oil ring groove in piston ring body bottom, the place is provided with circular groove with oil ring groove position corresponding piston body, it is characterized in that, several horizontal oil return blind holes are set on the downside of described oil ring groove.
3. novel laser welding piston with forged steel structure as claimed in claim 1 or 2, it is characterized in that, described piston ring body is connected with crossing the welding zone and cooperating to distinguish with piston only, and described welding zone is positioned at the piston ring body and the piston only contacting point on cooling oil pocket top, and the welding zone is a cylndrical surface; Described cooperation district is positioned at the piston ring body and the piston only contacting point of cooling oil pocket lower side, and cooperating the district is a ladder surface or profile of tooth Surface of action.
4. novel laser welding piston with forged steel structure as claimed in claim 1 or 2, it is characterized in that, described piston ring body is connected with crossing the welding zone and cooperating to distinguish with piston only, described welding zone is positioned at the piston ring body and the piston only contacting point of cooling oil pocket side, the welding zone is a toroidal surface, described cooperation district is positioned at the piston ring body and the piston only contacting point of cooling oil pocket lower side, and cooperating the district is a ladder surface or profile of tooth Surface of action.
5. novel laser welding piston with forged steel structure as claimed in claim 1 or 2 is characterized in that, described piston only bottom is provided with pin-and-hole, and circular groove does not communicate with piston cavity; Perhaps communicate with piston cavity in vertical pin-and-hole direction.
6. novel laser welding piston with forged steel structure as claimed in claim 1 or 2 is characterized in that, the diameter of described endless belt is less than cylinder hole 0.8-3.5mm.
7. novel laser welding piston with forged steel structure as claimed in claim 1 is characterized in that the axial direction of described spill port is parallel with the piston center line.
8. novel laser welding piston with forged steel structure as claimed in claim 2 is characterized in that, described horizontal oil return blind hole center line is on the oil ring groove downside or be higher than the oil ring groove downside, and the axial direction of this oil return blind hole is vertical with the piston center line.
9. novel laser welding piston with forged steel structure as claimed in claim 1 or 2 is characterized in that, also is provided with several compressions on the described piston ring body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010134820 CN101793205A (en) | 2010-03-30 | 2010-03-30 | Novel laser welding piston with forged steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010134820 CN101793205A (en) | 2010-03-30 | 2010-03-30 | Novel laser welding piston with forged steel structure |
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| CN101793205A true CN101793205A (en) | 2010-08-04 |
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| CN 201010134820 Pending CN101793205A (en) | 2010-03-30 | 2010-03-30 | Novel laser welding piston with forged steel structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204487A (en) * | 2012-02-10 | 2014-12-10 | 费德罗-莫格尔公司 | Piston with enhanced cooling gallery |
| CN104533653A (en) * | 2014-11-03 | 2015-04-22 | 马勒技术投资(中国）有限公司 | Piston capable of improving welding reliability of throat of combustion chamber and production method of piston |
| EP2958703A1 (en) * | 2013-02-22 | 2015-12-30 | Mahle International GmbH | Piston assembly with weld support |
| CN105422306A (en) * | 2014-07-11 | 2016-03-23 | 马勒技术投资(中国）有限公司 | Piston applied to internal combustion engine |
| WO2016131211A1 (en) * | 2015-02-16 | 2016-08-25 | 山东滨州渤海活塞股份有限公司 | Internal combustion engine piston having cooling gallery structure and internal combustion engine |
| CN107084069A (en) * | 2017-05-22 | 2017-08-22 | 无锡华星机电制造有限公司 | A kind of engine piston |
| CN112307582A (en) * | 2020-10-30 | 2021-02-02 | 滨州渤海活塞有限公司 | Finite element modeling method for forged steel piston |
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| CN2257863Y (en) * | 1996-04-26 | 1997-07-16 | 山东活塞厂 | Motorcycle piston |
| CN2382848Y (en) * | 1999-08-16 | 2000-06-14 | 殷建华 | Oil leakage prevention piston |
| JP2004339998A (en) * | 2003-05-14 | 2004-12-02 | Toyota Motor Corp | Piston for internal combustion engine |
| CN101265854A (en) * | 2007-07-20 | 2008-09-17 | 山东滨州渤海活塞股份有限公司 | Laser welding forged steel integral piston with closed inner-cooling oil recess and its fabrication process |
| WO2009122640A1 (en) * | 2008-03-31 | 2009-10-08 | Tsuchida Shuichirou | Engine and piston |
| CN201416488Y (en) * | 2009-03-20 | 2010-03-03 | 常州朗锐活塞有限公司 | High-strength combustion engine piston |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2257863Y (en) * | 1996-04-26 | 1997-07-16 | 山东活塞厂 | Motorcycle piston |
| CN2382848Y (en) * | 1999-08-16 | 2000-06-14 | 殷建华 | Oil leakage prevention piston |
| JP2004339998A (en) * | 2003-05-14 | 2004-12-02 | Toyota Motor Corp | Piston for internal combustion engine |
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| CN201416488Y (en) * | 2009-03-20 | 2010-03-03 | 常州朗锐活塞有限公司 | High-strength combustion engine piston |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204487A (en) * | 2012-02-10 | 2014-12-10 | 费德罗-莫格尔公司 | Piston with enhanced cooling gallery |
| US10753310B2 (en) | 2012-02-10 | 2020-08-25 | Tenneco Inc. | Piston with enhanced cooling gallery |
| EP2958703A1 (en) * | 2013-02-22 | 2015-12-30 | Mahle International GmbH | Piston assembly with weld support |
| CN105246639A (en) * | 2013-02-22 | 2016-01-13 | 马勒国际有限公司 | Piston assembly with weld support |
| CN105246639B (en) * | 2013-02-22 | 2017-07-07 | 马勒国际有限公司 | There is the piston component of Weld-supporting |
| CN105422306A (en) * | 2014-07-11 | 2016-03-23 | 马勒技术投资(中国）有限公司 | Piston applied to internal combustion engine |
| CN104533653A (en) * | 2014-11-03 | 2015-04-22 | 马勒技术投资(中国）有限公司 | Piston capable of improving welding reliability of throat of combustion chamber and production method of piston |
| WO2016131211A1 (en) * | 2015-02-16 | 2016-08-25 | 山东滨州渤海活塞股份有限公司 | Internal combustion engine piston having cooling gallery structure and internal combustion engine |
| CN107084069A (en) * | 2017-05-22 | 2017-08-22 | 无锡华星机电制造有限公司 | A kind of engine piston |
| CN112307582A (en) * | 2020-10-30 | 2021-02-02 | 滨州渤海活塞有限公司 | Finite element modeling method for forged steel piston |
| CN112307582B (en) * | 2020-10-30 | 2023-06-16 | 滨州渤海活塞有限公司 | Finite element modeling method for forged steel piston |
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Open date: 20100804 |