CN108443027A - A kind of steel pistons friction welding (FW) contact face structure - Google Patents
A kind of steel pistons friction welding (FW) contact face structure Download PDFInfo
- Publication number
- CN108443027A CN108443027A CN201810227527.6A CN201810227527A CN108443027A CN 108443027 A CN108443027 A CN 108443027A CN 201810227527 A CN201810227527 A CN 201810227527A CN 108443027 A CN108443027 A CN 108443027A
- Authority
- CN
- China
- Prior art keywords
- piston
- friction welding
- contacting surface
- steel pistons
- contact face
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- 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
- F02F2003/0007—Monolithic pistons; One piece constructions; Casting of pistons
Abstract
The invention discloses a kind of steel pistons friction welding (FW) contact face structures, including the piston crown being oppositely arranged and piston skirt, and relative friction welding contacting surface is plane between the piston crown and piston skirt, and the two relative friction welding contacting surface edge extends outward.The steel pistons friction welding contacting surface is reasonable in design, the trend of welding overlap can preferably be controlled, welding overlap is not easy to form sharp concave corners with piston only, original fillet is retained, improve piston self structure intensity, piston cracking risk is reduced, to improve engine whole aircraft reliability and product competitiveness；And it is simple in structure, it is at low cost.
Description
Technical field
The present invention relates to technical field of engines, more particularly, to a kind of steel pistons friction welding (FW) contact face structure.
Background technology
Core part of the piston as internal combustion engine, bent axle is passed to by In-cylinder Combustion Pressure, to output torque, bear compared with
Big active force.As discharge and internal combustion engine reinforcing degree, reliability requirement are continuously improved, explosion pressure is higher and higher, passes
System cast aluminium piston has been unable to meet its requirement.Steel pistons are widely used in diesel oil because of advantages such as its tensile strength height, heatproof height
On machine, especially large diesel engine.
Friction welding (FW) is a kind of press welding method, under external force, utilizes the relative friction and plasticity between weldment contact surface
Heat caused by flowing makes contact surface and its close region reach visco-plasticity state and generates macroscopic view plastic deformation appropriate,
It completes to weld by the phase counterdiffusion of two layers of material and dynamic recrystallization.
Steel pistons head and skirt section form an entirety by friction welding, and the metal of high temperature melting can be along weldering when welding
Junction flows out, and overlap and the ontology of formation are likely to form sharp angle, and are difficult to control its overlap trend, since piston is born
Detonation pressure it is higher, especially lean on the welding position of entad, sharp concave corners position to easily cause stress concentration, piston exist compared with
Big cracking risk.
Invention content
In view of the shortcomings of the prior art, technical problem to be solved by the invention is to provide a kind of steel pistons friction welding contacting surfaces
Structure is not easy to form sharp concave corners, reduces the purpose of piston cracking risk to reach welding overlap and piston only.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
The steel pistons friction welding (FW) contact face structure, including the piston crown being oppositely arranged and piston skirt, the piston head
Relative friction welding contacting surface is plane between portion and piston skirt, and the two relative friction welding contacting surface edge extends outward.
Further, it is recessed to be equipped with annular for the piston crown and the piston skirt relative friction welding contacting surface edge back side
Slot.
The annular groove is arc groove.
The groove is rounded grooves.
The friction welding contacting surface of the piston crown and piston skirt extends outwardly length less than 3mm.
The piston crown and the rounded grooves radius at the piston skirt relative friction welding contacting surface edge back side are more than 2mm.
Compared with prior art, the present invention haing the following advantages：
The steel pistons friction welding contacting surface is reasonable in design, can preferably control the trend of welding overlap, welds overlap
It is not easy to form sharp concave corners with piston only, original fillet is retained, and is improved piston self structure intensity, is reduced piston
Cracking risk, to improve engine whole aircraft reliability and product competitiveness；And it is simple in structure, it is at low cost.
Description of the drawings
The content expressed by each width attached drawing of this specification and the label in figure are briefly described below：
Fig. 1 is steel pistons sectional view of the present invention.
Fig. 2 is friction welding contact surface partial schematic diagram of the present invention.
Fig. 3 is present invention welding overlap schematic diagram.
In figure：
1. piston crown, 2. piston skirts, 3. welding overlaps, the partially schematic regions P..
Specific implementation mode
Below against attached drawing, by the description of the embodiment, making to the specific implementation mode of the present invention further details of
Explanation.
As shown in Figure 1 to Figure 3, the steel pistons friction welding (FW) contact face structure, including the piston crown 1 and piston that are oppositely arranged
Skirt section 2, relative friction welding contacting surface is plane between piston crown 1 and piston skirt 2, and the two relative friction welds contacting surface edge
Extend outward.
Piston crown and the piston skirt relative friction welding contacting surface edge back side are all provided with fluted；I.e. piston crown is in piston
The friction welding contacting surface edge back side in head is equipped with groove, and piston skirt is equipped with recessed at the piston skirt friction welding contacting surface edge back side
Slot.
Groove is annular groove, is located on the whole circle of piston crown and piston skirt.Alternatively, groove is uniform intervals setting
One group.
Annular groove is arc groove or rounded grooves；It is preferred that rounded grooves, simple processing.
It can find out that steel pistons head 1 and piston skirt 2 pass through friction welding shape by partially schematic region P enlarged views
At an entirety.Friction welding contacting surface is plane, is extended to both sides in contact position, and development length L1-L4 should be less than 3mm,
R1-R4 fillets are reserved at its back side, and radius of corner should be greater than 2mm.The metal of high temperature melting will connect along original when can guarantee welding
Contacting surface flows, and is not easy to form sharp wedge angle between the welding overlap 3 and ontology of formation, former fillet is retained, to avoid answering
Power is concentrated.
Welding overlap is not easy to form sharp concave corners with piston only, can preferably control the trend of welding overlap, improves and lives
It fills in self structure intensity, reduce piston cracking risk, improve engine whole aircraft reliability and product competitiveness.
It above are only and preferred embodiments of the present invention are illustrated, above-mentioned technical characteristic can form multiple hairs in any combination
Bright example scheme.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as use the present invention design and technical solution carry out various unsubstantialities improvement, or it is not improved will
The design and technical solution of the present invention directly applies to other occasions, within protection scope of the present invention.
Claims (6)
1. a kind of steel pistons friction welding (FW) contact face structure, including the piston crown being oppositely arranged and piston skirt, it is characterised in that：
Relative friction welding contacting surface is plane between the piston crown and piston skirt, the two relative friction weld contacting surface edge to
Outside extends.
2. steel pistons friction welding (FW) contact face structure as described in claim 1, it is characterised in that：The piston crown and piston skirt
The relative friction welding contacting surface edge back side is equipped with annular groove.
3. steel pistons friction welding (FW) contact face structure as claimed in claim 2, it is characterised in that：The annular groove is that arc is recessed
Slot.
4. steel pistons friction welding (FW) contact face structure as claimed in claim 2, it is characterised in that：The groove is rounded grooves.
5. steel pistons friction welding (FW) contact face structure as claimed in claim 2, it is characterised in that：The piston crown and piston skirt
Friction welding contacting surface extend outwardly length be less than 3mm.
6. steel pistons friction welding (FW) contact face structure as claimed in claim 4, it is characterised in that：The piston crown and piston skirt
The rounded grooves radius that relative friction welds the contacting surface edge back side is more than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810227527.6A CN108443027A (en) | 2018-03-20 | 2018-03-20 | A kind of steel pistons friction welding (FW) contact face structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810227527.6A CN108443027A (en) | 2018-03-20 | 2018-03-20 | A kind of steel pistons friction welding (FW) contact face structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108443027A true CN108443027A (en) | 2018-08-24 |
Family
ID=63195834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810227527.6A Pending CN108443027A (en) | 2018-03-20 | 2018-03-20 | A kind of steel pistons friction welding (FW) contact face structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108443027A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279455B1 (en) * | 1998-10-06 | 2001-08-28 | Caterpillar Inc. | Method and apparatus for making a two piece unitary piston |
| JP2001287052A (en) * | 2000-04-05 | 2001-10-16 | Komatsu Ltd | Joint and method for friction pressure welding of tubular member made of carbon steel and solid round bar |
| CN101142048A (en) * | 2004-07-16 | 2008-03-12 | Ejot合资有限公司 | Fastening element for being friction welded to a flat component |
| US20090151555A1 (en) * | 2007-12-12 | 2009-06-18 | Lapp Michael T | Piston with a cooling gallery |
| CN101939526A (en) * | 2007-12-10 | 2011-01-05 | 费德罗-莫格尔公司 | Piston assembly and connecting rod having a profiled wrist pin bore therefor |
| DE102009059055A1 (en) * | 2009-12-18 | 2011-06-22 | MAHLE International GmbH, 70376 | Method for connecting two components, where each component has a joining surface, comprises connecting two joining surfaces associated to each other by means of a friction welding |
| CN104603419A (en) * | 2012-06-27 | 2015-05-06 | 马勒国际有限公司 | Piston with cooling gallery and closed collar chamber |
| CN206299470U (en) * | 2016-11-23 | 2017-07-04 | 日照金港活塞有限公司 | A kind of friction welding piston |
| CN208024475U (en) * | 2018-03-20 | 2018-10-30 | 玉柴联合动力股份有限公司 | Steel pistons friction welding (FW) contact face structure |
-
2018
- 2018-03-20 CN CN201810227527.6A patent/CN108443027A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279455B1 (en) * | 1998-10-06 | 2001-08-28 | Caterpillar Inc. | Method and apparatus for making a two piece unitary piston |
| JP2001287052A (en) * | 2000-04-05 | 2001-10-16 | Komatsu Ltd | Joint and method for friction pressure welding of tubular member made of carbon steel and solid round bar |
| CN101142048A (en) * | 2004-07-16 | 2008-03-12 | Ejot合资有限公司 | Fastening element for being friction welded to a flat component |
| CN101939526A (en) * | 2007-12-10 | 2011-01-05 | 费德罗-莫格尔公司 | Piston assembly and connecting rod having a profiled wrist pin bore therefor |
| US20090151555A1 (en) * | 2007-12-12 | 2009-06-18 | Lapp Michael T | Piston with a cooling gallery |
| DE102009059055A1 (en) * | 2009-12-18 | 2011-06-22 | MAHLE International GmbH, 70376 | Method for connecting two components, where each component has a joining surface, comprises connecting two joining surfaces associated to each other by means of a friction welding |
| CN104603419A (en) * | 2012-06-27 | 2015-05-06 | 马勒国际有限公司 | Piston with cooling gallery and closed collar chamber |
| CN206299470U (en) * | 2016-11-23 | 2017-07-04 | 日照金港活塞有限公司 | A kind of friction welding piston |
| CN208024475U (en) * | 2018-03-20 | 2018-10-30 | 玉柴联合动力股份有限公司 | Steel pistons friction welding (FW) contact face structure |
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