CN103016194A - Double-cooling oil chamber welded type integrally-steel-forged internal combustion engine piston and fabricating method thereof - Google Patents
Double-cooling oil chamber welded type integrally-steel-forged internal combustion engine piston and fabricating method thereof Download PDFInfo
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- CN103016194A CN103016194A CN2012105004993A CN201210500499A CN103016194A CN 103016194 A CN103016194 A CN 103016194A CN 2012105004993 A CN2012105004993 A CN 2012105004993A CN 201210500499 A CN201210500499 A CN 201210500499A CN 103016194 A CN103016194 A CN 103016194A
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Abstract
The invention discloses a double-cooling oil chamber welded type integrally-steel-forged internal combustion engine piston and a fabricating method thereof. The piston comprises a piston upper par and a piston lower part, which are formed through welding; the ring-shaped cooling oil chambers, which are arranged in the middle in the piston head part at the lower part of a combustion chamber, and a basin-shaped cooling oil chamber, which is arranged along the interior of a ring groove, are communicated with each other through oil holes; an oil outlet connected with the basin-shaped cooling oil chamber is formed in the middle of the upper part of the piston lower part; the lower part of the oil outlet is connected with a piston inner chamber; the ring-shaped cooling oil chambers are connected with the piston inner chamber through oil inlets; the piston upper part and the piston lower part are separately forged; the cooling oil chambers are formed through welding after the piston upper part and the piston lower part are respectively processed, so as to simplify the process of forging a piston blank and that of forming the sealed oil chambers, and accordingly the structural strength of the piston is higher; and with the two cooling oil chambers, the working temperature of the piston can be reduced so as to improve the reliability.
Description
Technical field
The present invention relates to the internal combustion engine technical field, relate in particular to the whole forged steel internal combustion engine of a kind of pair of cooling oil chamber welding type and manufacture method thereof.
Background technique
Along with the progress of demand and the technology in market, be used for the motors such as truck, engineering machinery and boats and ships all to high-power, high load future development, reinforcing degree improves constantly, and emission request is more and more stricter.The structural strength of original conventional all-aluminium piston and the ability of bearing high heat load, high mechanical load can not satisfy motor high power, the high reinforcement and the requirement of low emission gradually.Also have to adopt and make the integral type piston with forged steel structure, this piston blank integral type is forged, process annular chamber from annular groove below feed, then the annular chamber that processes with a ring cowling and head forms oil closed cavity, and this piston causes manufacturability relatively complicated owing to adopted the design of oil pocket ring cowling, manufacture cost is higher, the encapsulation of oil pocket is relatively poor simultaneously, and can only arrange an annular cooling oil chamber, and cooling effect is relatively relatively poor.
Summary of the invention
Purpose of the present invention is exactly the problems referred to above and the deficiency that exists in order to solve prior art; Provide a kind of pair of cooling oil chamber welding type whole forged steel internal combustion engine; Forge respectively piston top and piston bottom, cooling oil chamber is to form by welding after piston top and piston bottom process respectively, make the forging of piston blank, the formation reduction of process of oil closed cavity, the structural strength of piston is higher, arrange two cooling oil chambers, more be conducive to reduce the operating temperature of piston, improve reliability.
The present invention also provides the manufacture method of the whole forged steel internal combustion engine of a kind of pair of cooling oil chamber welding type.
To achieve these goals, the present invention adopts following technological scheme:
A kind of pair of whole forged steel internal combustion engine of cooling oil chamber welding type, comprise piston top, piston bottom, piston top and piston bottom are welded, the piston crown bosom of bottom, described firing chamber is provided with annular cooling oil chamber, is provided with basin shape cooling oil chamber along the inside of annular groove, the annular cooling oil chamber is connected by oilhole with basin shape cooling oil chamber, the central upper portion of piston bottom is provided with the oil outlet that is connected with basin shape cooling oil chamber, the oil outlet bottom is connected with piston cavity, and annular cooling oil chamber is connected with piston cavity by oil inlet hole.
Be provided with circular groove between piston crown and the skirt section, circular groove communicates with inner chamber at the piston long axis direction.
Forge respectively piston top and piston bottom, welds together after roughing.
Piston top and piston bottom weld together by friction welding or laser beam welding, and position while welding is located at the cylindrical position between the annular groove of piston crown.
The manufacture method of a kind of pair of whole forged steel internal combustion engine of cooling oil chamber welding type may further comprise the steps:
1., respectively forge the blank of piston top and piston bottom, the connection oilhole in the piston top is forging and molding together;
2., respectively to piston top blank and the blank heat treatment of piston bottom;
3., respectively the blank of piston top and piston bottom is processed first, process the shape of the welding region of annular cooling oil chamber, basin shape cooling oil chamber and piston top and piston bottom;
4., piston top and piston bottom weld together by friction welding or laser beam welding mode, the operative position of annular groove need be avoided in the position of weld seam;
5., process respectively circular groove, firing chamber, annular groove, pin-and-hole, jump-ring slot, oil inlet hole, oil outlet;
6., piston face is carried out phosphatization or graphitization processing, finish the finished product manufacturing.
2. step adopts Hardened And Tempered Steel, and heat treatment step is: at 1-2 hour oil cooling then of 800-850 ℃ of insulation, 600 ℃ ± 10 ℃ of tempering temperatures are incubated 1.5-2.5 hour.
2. step adopts non-hardened and tempered steel, and temperature is cooled to 500 ℃ by about about 1100 ℃ after guaranteeing to forge in 3-4 minute, and then direct air cooling is to room temperature.
The principle of work of the present invention: forge respectively piston of the present invention top and bottom, welds together after roughing, forms annular cooling oil chamber and basin shape cooling oil chamber in piston crown, is connected by being communicated with oilhole between the oil pocket of two sealings.Simultaneously, two cooling oil chambers communicate with piston cavity by oil inlet hole, oil outlet.When piston was worked in motor, cooling machine oil sprayed in the annular cooling oil chamber by oil inlet hole, and entered in the basin shape cooling oil chamber by being communicated with oilhole, and machine oil shakes in two oil pockets simultaneously, flows out from oil outlet at last, takes away the heat of piston only.Wherein, annular cooling oil chamber mainly works to reduce piston-top surface, annular groove and edge of combustion chamber position heat load; Basin shape cooling oil chamber mainly reduces the heat load in neutral position, firing chamber.This pair of cooling oil chamber structure can effectively reduce the operating temperature of piston more, guarantees the functional reliability of piston and piston ring.Can require to process circular groove according to specific design between piston crown and the skirt section, communicate with inner chamber at the piston long axis direction, be conducive to oil ring groove position machine oil and reflux, alleviate simultaneously product weight.
Beneficial effect of the present invention:
1. the present invention can replace former all-aluminium piston and integral type forging steel piston with the whole forging steel piston of the welding type of two cooling oil chambers, have lightweight, intensity is high, the advantage of good cooling results, satisfies reinforcement and the emission request of motor;
2. two cooling oil chamber structures effectively reduce the operating temperature of piston, guarantee the functional reliability of piston and piston ring;
3. can require to process circular groove according to specific design between piston crown and the skirt section, communicate with inner chamber at the piston long axis direction, be conducive to oil ring groove position machine oil and reflux, alleviate simultaneously product weight.
4. piston top and the bottom manufacture method of forging respectively is than the method good manufacturability of blank solid forging moulding, and the blank residual stress is little, forms the cooling oil chamber of sealing by welding, and it is little to increase the hot lower distortion of piston overall structure rigidity, particularly annular groove position.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is structural representation after the blank roughing of piston top;
Fig. 4 is structural representation after the blank roughing of piston bottom;
Wherein, 1 piston, 2 piston tops, 3 piston bottoms, 4 piston crowns, 5 piston skirts, 6 firing chambers, 7 annular cooling oil chambers, 8 basin shape cooling oil chambers, 9 oil inlet holes, 10 oil outlets, 11 are communicated with oilhole, 12 welding regions, 13 pin-and-holes, 14 key seats, 15 jump-ring slots, 16 inner chambers, 17 annular grooves, 18 circular grooves.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Embodiment 1, a kind of pair of whole forged steel internal combustion engine of cooling oil chamber welding type, in conjunction with Fig. 1 to Fig. 4, piston 1 comprises piston top 2, piston bottom 3, piston top 2 is welded with piston bottom 3, piston crown 4 bosoms of 6 bottoms, described firing chamber are provided with annular cooling oil chamber 7, inside along annular groove is provided with basin shape cooling oil chamber 8, annular cooling oil chamber 7 is connected by being communicated with oilhole 11 with basin shape cooling oil chamber 8, the central upper portion of piston bottom 3 is provided with the oil outlet 10 that is connected with basin shape cooling oil chamber 8, oil outlet 10 bottoms are connected with piston cavity 16, annular cooling oil chamber 7 is connected with piston cavity 16 by oil inlet hole 9, forge respectively with piston bottom 3 on piston top 2, after roughing, pass through friction welding, or laser beam welding welds together, and welded seam area 12 positions are located at the cylindrical position between the annular groove 17 of piston crown 4.
The manufacture method of the whole forged steel internal combustion engine of two cooling oil chamber welding types may further comprise the steps:
1., respectively forge the blank of piston top 2 and piston bottom 3, the connection oilhole 11 in the piston top 2 is forging and molding together;
2., respectively piston top 2 blanks and piston bottom 3 blanks are heat-treated;
3., respectively the blank of piston top 2 and piston bottom 3 is processed first, process the shape of annular cooling oil chamber 7, basin shape cooling oil chamber 8 and piston top 2 and the welding region 12 of piston bottom 3;
4., piston top 2 welds together by friction welding or laser beam welding mode with piston bottom 3, the operative position of annular groove 17 need be avoided in the position of welded seam area 12;
5., process respectively pin-and-hole 13, jump-ring slot 15, oil inlet hole 9, oil outlet 10 and boundary dimension on circular groove 18, firing chamber 6, annular groove 17, the key seat 14;
6., piston face is carried out phosphatization or graphitization processing, finish the finished product manufacturing.
2. step adopts Hardened And Tempered Steel, and heat treatment step is: at 1-2 hour oil cooling then of 800-850 ℃ of insulation, 600 ℃ ± 10 ℃ of tempering temperatures are incubated 1.5-2.5 hour.
2. step adopts non-hardened and tempered steel, and temperature is cooled to 500 ℃ by about about 1100 ℃ after guaranteeing to forge in 3-4 minute, and then direct air cooling is to room temperature.
Although above-mentioned by reference to the accompanying drawings to the invention embodiment be described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (7)
1. whole forged steel internal combustion engine of two cooling oil chamber welding types, comprise piston top, piston bottom, it is characterized in that, described piston top and piston bottom are welded, the piston crown bosom of bottom, described firing chamber is provided with annular cooling oil chamber, is provided with basin shape cooling oil chamber along the inside of annular groove, the annular cooling oil chamber is connected by oilhole with basin shape cooling oil chamber, the central upper portion of piston bottom is provided with the oil outlet that is connected with basin shape cooling oil chamber, the oil outlet bottom is connected with piston cavity, and annular cooling oil chamber is connected with piston cavity by oil inlet hole.
2. the whole forged steel internal combustion engine of a kind of pair of cooling oil chamber welding type as claimed in claim 1 is characterized in that be provided with circular groove between described piston crown and the piston skirt, circular groove communicates with inner chamber at the piston long axis direction.
3. the whole forged steel internal combustion engine of a kind of pair of cooling oil chamber welding type as claimed in claim 1 is characterized in that forge respectively described piston top and piston bottom, welds together after roughing.
4. the whole forged steel internal combustion engine of a kind of pair of cooling oil chamber welding type as claimed in claim 1, it is characterized in that, described piston top and piston bottom weld together by friction welding or laser beam welding, and position while welding is located at the cylindrical position between the annular groove of piston crown.
5. such as the manufacture method of the whole forged steel internal combustion engine of the two cooling oil chamber welding types of any one as described in the claim 1 to 4, it is characterized in that, comprise the following steps:
1., respectively forge the blank of piston top and piston bottom, the connection oilhole in the piston top is forging and molding together;
2., respectively to piston top blank and the blank heat treatment of piston bottom;
3., respectively the blank of piston top and piston bottom is processed first, process the shape of the welding region of annular cooling oil chamber, basin shape cooling oil chamber and piston top and piston bottom;
4., piston top and piston bottom weld together by friction welding or laser beam welding mode, the operative position of annular groove need be avoided in the position of weld seam;
5., process respectively circular groove, firing chamber, annular groove, pin-and-hole, jump-ring slot, oil inlet hole, oil outlet;
6., piston face is carried out phosphatization or graphitization processing, finish the finished product manufacturing.
6. the manufacture method of the whole forged steel internal combustion engines of two cooling oil chamber welding types as claimed in claim 5, it is characterized in that 2. described step adopts Hardened And Tempered Steel, heat treatment step is: at 1-2 hour oil cooling then of 800-850 ℃ of insulation, 600 ℃ ± 10 ℃ of tempering temperatures are incubated 1.5-2.5 hour.
7. the manufacture method of the whole forged steel internal combustion engines of two cooling oil chamber welding types as claimed in claim 5, it is characterized in that, 2. described step adopts non-hardened and tempered steel, and temperature is cooled to 500 ℃ by about about 1100 ℃ after guaranteeing to forge in 3-4 minute, and then direct air cooling is to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105004993A CN103016194A (en) | 2012-11-30 | 2012-11-30 | Double-cooling oil chamber welded type integrally-steel-forged internal combustion engine piston and fabricating method thereof |
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| CN2012105004993A CN103016194A (en) | 2012-11-30 | 2012-11-30 | Double-cooling oil chamber welded type integrally-steel-forged internal combustion engine piston and fabricating method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925104A (en) * | 2014-05-07 | 2014-07-16 | 广西玉柴机器股份有限公司 | Piston cooling structure |
| CN104005876A (en) * | 2014-05-26 | 2014-08-27 | 滨州东海龙活塞有限公司 | Threaded welding type integral forged steel piston |
| CN104153909A (en) * | 2014-08-28 | 2014-11-19 | 河南柴油机重工有限责任公司 | Intensive-cooling steel piston of gas engine |
| CN105263654A (en) * | 2013-04-05 | 2016-01-20 | 费德罗-莫格尔公司 | Piston made using additive manufacturing techniques |
| CN106536889A (en) * | 2014-07-19 | 2017-03-22 | 道依茨股份公司 | Combustion method |
| CN106704021A (en) * | 2015-11-17 | 2017-05-24 | 强哲菲 | Double-cooling-oil-cavity piston of internal combustion engine |
| WO2018188490A1 (en) * | 2017-04-14 | 2018-10-18 | 强莉莉 | Steel piston and forming method therefor |
| 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 |
| CN114439642A (en) * | 2022-01-28 | 2022-05-06 | 湖南江滨机器（集团）有限责任公司 | Piston and manufacturing method thereof |
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| US20010025568A1 (en) * | 2000-03-28 | 2001-10-04 | Mahle Gmbh | One-piece piston |
| US6477941B1 (en) * | 1999-10-08 | 2002-11-12 | Federal-Mogul World Wide, Inc. | Dual gallery piston |
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| CN202970933U (en) * | 2012-11-30 | 2013-06-05 | 山东滨州渤海活塞股份有限公司 | Welded type combustion engine piston of integrated forged steel structure and with double coolant oil cavities |
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| US3930472A (en) * | 1973-09-28 | 1976-01-06 | M.A.N. | Composite oil-cooled piston for an internal combustion engine |
| US6477941B1 (en) * | 1999-10-08 | 2002-11-12 | Federal-Mogul World Wide, Inc. | Dual gallery piston |
| US20010025568A1 (en) * | 2000-03-28 | 2001-10-04 | Mahle Gmbh | One-piece piston |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263654A (en) * | 2013-04-05 | 2016-01-20 | 费德罗-莫格尔公司 | Piston made using additive manufacturing techniques |
| CN103925104A (en) * | 2014-05-07 | 2014-07-16 | 广西玉柴机器股份有限公司 | Piston cooling structure |
| CN104005876A (en) * | 2014-05-26 | 2014-08-27 | 滨州东海龙活塞有限公司 | Threaded welding type integral forged steel piston |
| CN104005876B (en) * | 2014-05-26 | 2017-01-18 | 滨州东海龙活塞有限公司 | Threaded welding type integral forged steel piston |
| CN106536889A (en) * | 2014-07-19 | 2017-03-22 | 道依茨股份公司 | Combustion method |
| CN104153909A (en) * | 2014-08-28 | 2014-11-19 | 河南柴油机重工有限责任公司 | Intensive-cooling steel piston of gas engine |
| CN106704021A (en) * | 2015-11-17 | 2017-05-24 | 强哲菲 | Double-cooling-oil-cavity piston of internal combustion engine |
| WO2018188490A1 (en) * | 2017-04-14 | 2018-10-18 | 强莉莉 | Steel piston and forming method therefor |
| 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 |
| CN114439642A (en) * | 2022-01-28 | 2022-05-06 | 湖南江滨机器（集团）有限责任公司 | Piston and manufacturing method thereof |
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Application publication date: 20130403 |