CN208089422U - A kind of welded type entirety forging steel piston - Google Patents
A kind of welded type entirety forging steel piston Download PDFInfo
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- CN208089422U CN208089422U CN201820463747.4U CN201820463747U CN208089422U CN 208089422 U CN208089422 U CN 208089422U CN 201820463747 U CN201820463747 U CN 201820463747U CN 208089422 U CN208089422 U CN 208089422U
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Abstract
The utility model discloses a kind of welded type entirety forging steel piston, including piston crown and piston skirt made of forging, the piston crown is fixedly connected with the piston skirt；Closed cooling oil chamber is formed between the piston crown and the piston skirt, the cooling oil chamber is communicated by fuel feed hole, oil outlet with outside；The piston crown bottom end, which has been arranged concentrically in annular, welds shoulder A and external welding shoulder A, the piston skirt top has been arranged concentrically welds shoulder B and external welding shoulder B in the matched annular of the interior welding shoulder A and the external welding shoulder A respectively, the interior welding shoulder A is welded with the interior welding shoulder B by friction welding (FW), and main weld is formed；The external welding shoulder A is welded with the external welding shoulder B by melting welding, and auxiliary weld seam is formed.The utility model provides a kind of reasonable for structure, safe and reliable, higher welded type entirety forging steel piston of production efficiency.
Description
Technical field
The utility model is related to piston manufacturing techniques field, more particularly to a kind of welded type entirety forged steel is lived
Plug.
Background technology
Piston is automobile engine " heart ", bears the mechanical load and thermic load of alternation, is the item that works in engine
One of worst key components and parts of part.The function of piston is subject to gas pressure, and is transmitted to connecting rod by gudgeon pin shaft and drives
Bent axle rotates, and the failure of piston can cause engine to run out of steam, even result in whole engine and scrap.
In recent ten years, engine design, manufacturing technology are improved rapidly, and especially diesel engine is all in Xiang great Gong
Rate, high load capacity direction are developed, and reinforcing degree is continuously improved, and explosive force alreadys exceed 20MPa, while emission request is more and more tighter
Lattice, aluminium material cannot gradually meet engine high power, high intensity, discharge requirement.So many companies all exist now
Steel material is selected to substitute aluminum alloy materials, the especially PDT R&D Representative of forging steel piston material when the direction of secondary piston development.
There are mainly two types of present steel pistons：One is hinged pendulum mass formulas, and one is whole forged steel.Hinged pendulum mass formula structure is piston head
Portion is forged steel, and skirt section is aluminium, is connected by piston pin after separate machined, this piston is difficult to form closed cooling oil
Chamber, piston cooling effect is poor, simultaneously as longer piston pin is needed to be attached, overall weight also increased, and exist now
Some developed countries have been phased out.Whole forging steel piston is usually that head and skirt section are forged after roughing respectively, is led to
Certain mode is crossed to combine to form an entirety.
Chinese patent CN 1610601A disclose a kind of method of manufacture forging steel piston, and this method is head and skirt portion
It does not forge, inner-cooling oil recess is formed by friction welding after head and skirt section process respectively, head and skirt section twice end face weld
The primary welding of seam is completed, and bonding area is larger, is influenced by equipment precision and ability, and large-diameter piston can not normal weld.This
Outside, high-power friction welding (FW) needs to consume prodigious electricity, waste of energy.
102407431 B of Chinese patent CN disclose a kind of hot spinning forged steel integral piston manufacture with inner-cooling oil recess
Technique, this method be integral workblank processing oil road inboard portion and sheltering part after, by hot spinning system to cooling oil chamber into
Row closing.Blank is structure as a whole needed for the technique, and forging technology is more complex, since the wall thickness of piston blank is thicker, hot spinning
It makes less efficient.The utility model, which is mentioned, during hot spinning needs spinning block, due to being closed inner-cooling oil duct, spinning block
The not specified (NS) for how working and taking out, additionally, due to during hot spinning material plasticity deform, oil duct need close or
The gap of very little again, needs higher in processing oil duct sheltering part machining accuracy.
Therefore, how to provide a kind of reasonable for structure, safe and reliable, the higher welded type entirety forging steel piston of production efficiency is
The problem of those skilled in the art's urgent need to resolve.
Utility model content
In view of this, the utility model provides a kind of welded type entirety forging steel piston, on the one hand, piston crown and skirt section
Blank simplifies forging technology, and the requirement to equipment tonnage reduces, to reduce equipment cost by the way of separately forging
Input；On the other hand, the separate machined in piston crown and skirt section also reduces the requirement to equipment, cutter；Meanwhile piston head
Portion and the twice weld seam of piston skirt only have it is internal together with weld seam friction welding (FW), reduce the requirement to friction-welding machine power, to
So that large-diameter piston is welded using the friction-welding machine of lower-wattage, reduces the input of equipment, expand the use of equipment
Range；Electron beam welding mode or argon arc welding welding mode is selected to weld piston crown periphery and piston skirt periphery,
Auxiliary weld seam is formed, the reliability of welding is enhanced.
The utility model provides a kind of welded type entirety forging steel piston, including piston crown and piston skirt made of forging
Portion, the piston crown are fixedly connected with the piston skirt；Closing is formed between the piston crown and the piston skirt
Cooling oil chamber, the cooling oil chamber communicated by fuel feed hole, oil outlet with outside；The piston crown bottom end has been arranged concentrically
Weld shoulder A and external welding shoulder A in annular, the piston skirt top be arranged concentrically respectively with the interior welding shoulder A and described
Welding shoulder B and external welding shoulder B, the interior welding shoulder A pass through friction with the interior welding shoulder B in the matched annulars of external welding shoulder A
It is welded, forms main weld；The external welding shoulder A is welded with the external welding shoulder B by melting welding, and auxiliary weldering is formed
Seam；
Preferably, in a kind of above-mentioned welded type entirety forging steel piston, the piston crown and the piston skirt are selected
Quenched and tempered steel or non-hardened and tempered steel forging, quenched and tempered steel select 42CrMo, non-hardened and tempered steel to select 38MnVS6.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston, the piston skirt is in the cooling oil chamber bottom
The fuel feed hole and the oil outlet are set, the circulating cooling system of the cooling medium and engine in the cooling oil chamber is enable
System connection, to preferably be cooled down to piston.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston, the main weld is passed through using 45 tons of friction-welding machines
Welding is formed, 45 tons of friction-welding machines maximum upset force 390KN, maximum weld area 4100mm2, reduce to friction-welding machine work(
The requirement of rate is reduced the input of equipment, expanded to enable large-diameter piston to be welded using the friction-welding machine of lower-wattage
The use scope of equipment.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston, the auxiliary weld seam include top surface auxiliary weld seam and
Outer circle assists weld seam, and the top surface auxiliary weld seam is mainly used for reinforcing the quality of connection of piston crown and piston skirt, described outer
Circle auxiliary weld seam plays the role of supporting piston ring.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston, the top surface auxiliary weld seam uses vacuum electron beam
Weldering is welded, and speed of welding is 300mm/ minutes, and using twice of welding procedure, high pressure 80KV, line is welded in first pass preheating
For 15mA, second time welding line is determined according to the depth of weld, to improve welding quality.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston, the outer circle auxiliary weld seam uses argon arc welding welding
It forms, since temperature is relatively low at outer circle, outer circle auxiliary weld seam only plays the role of supporting piston ring, relatively low to level weld seam requirement,
Argon arc welding is selected, equipment investment is reduced, reduces cost.
A kind of welded type entirety forging steel piston manufacturing process, includes the following steps：
S1 selections：According to technological requirement, the satisfactory modulation steel of diameter or non-modulation rod iron material are selected, with sawing machine to stick
Material carries out cutting stock；
S2 hot-working：According to technological requirement, heating time is determined, be heated to the bar after cutting with electromagnetic induction furnace
1120-1250℃；
S3 is forged：Bar after being heated using 400 tons of hydraulic press rough forges, it is upset, billet surface oxide skin is removed, is used
1000 tons of electric screw press carry out finish forge to the piston crown blank and piston skirt blank of completing rough forge, are wanted according to technique
It asks determining finish forge number and each finish forge to use the size of pressure, obtains piston crown blank and piston skirt blank；
S4:Roughing：Cooling oil chamber top surface is processed in piston crown blank, welds shoulder A and external welding shoulder A in annular,
Cooling oil chamber bottom surface is processed in the blank of piston skirt, welds shoulder B and external welding shoulder B in annular；Obtain piston crown semi-finished product
With piston skirt semi-finished product；
S5 is welded：Using friction-welding machine to the piston crown semi-finished product and piston skirt semi-finished product progress friction welding (FW) after finish forge
It connects, interior welding shoulder A and interior welding shoulder B welds to form main weld using 45 tons of friction-welding machines, 45 tons of friction-welding machine maximums top
Forge power 390KN, maximum weld area 4100mm2；External welding shoulder A and external welding shoulder B is welded by melting welding, forms auxiliary weldering
Seam；Auxiliary weld seam includes top surface auxiliary weld seam and outer circle auxiliary weld seam；Wherein top surface auxiliary weld seam is welded using electron-bombardment welding
It connects, speed of welding is 300mm/ minutes, and using twice of welding procedure, high pressure 80KV, first pass preheating, welding line is
15mA, second time according to depth of weld determination welding line；Outer circle auxiliary weld seam is formed using argon arc welding welding.
S6 post-productions：Piston after welding is heat-treated, is finished, is surface-treated and finally obtains piston finished product.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston manufacturing process, in the heat treatment process, for
The piston forged using quenched and tempered steel, is first to heat to 845-855 DEG C, oil cooling after coming out of the stove after then keeping the temperature 2-3 hours, and temperature is
590-620 DEG C, 3-4 hours are kept the temperature, is finally come out of the stove air-cooled；For the piston using non-hardened and tempered steel forging, only make annealing treatment, with
Just de-stress is gone.
Preferably, in a kind of above-mentioned welded type entirety forging steel piston manufacturing process, the finishing：At will be through overheat
The Piston Machining of reason goes out the annular groove, pin hole, outer round face of piston；The surface treatment：Piston face after finishing is carried out
Phosphatization and graphitization processing.
It can be seen via above technical scheme that compared with prior art, the utility model, which discloses, provides a kind of welded type
Whole forging steel piston, first, piston crown and skirt section blank are processed by the way of separately forging, and simplify forging technology,
And the requirement to equipment tonnage is reduced, to reduce the input of equipment cost；
Secondly, the separate machined in piston crown and skirt section also reduces the requirement to equipment, cutter, keeps process simple
Rationally；Piston crown and the twice weld seam of piston skirt only have it is internal together with weld seam friction welding (FW), reduce to friction-welding machine power
Requirement, to enable large-diameter piston using lower-wattage friction-welding machine weld, reduce the input of equipment, expand
The use scope of welding equipment；
Finally, select electron beam welding mode or argon arc welding welding mode to piston crown periphery and piston skirt periphery into
Row welding forms auxiliary weld seam, enhances the reliability of welding；Fuel feed hole and fuel-displaced is arranged in cooling oil chamber bottom in piston skirt
Hole enables the cooling medium in cooling oil chamber to be connected to the circulating cooling system of engine, better to be carried out to piston
It is cooling.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the front section view of welded type entirety forging steel piston；
Fig. 2 is the side sectional view of welded type entirety forging steel piston；
Fig. 3 is the upward view of welded type entirety forging steel piston；
Fig. 4 is the stereogram of welded type entirety forging steel piston；
Fig. 5 is the manufacturing process flow diagram of welded type entirety forging steel piston.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The utility model embodiment discloses a kind of welded type entirety forging steel piston, on the one hand, piston crown and skirt section hair
Base simplifies forging technology, and the requirement to equipment tonnage reduces, to reduce equipment cost by the way of separately forging
Input；On the other hand, the separate machined in piston crown and skirt section also reduces the requirement to equipment, cutter；Meanwhile piston crown
Weld seam friction welding (FW) together with there was only inside with the twice weld seam of piston skirt, reduces the requirement to friction-welding machine power, to make
Large-diameter piston can use the friction-welding machine of lower-wattage to weld, and reduce the input of equipment, and expand equipment uses model
It encloses；Electron beam welding mode or argon arc welding welding mode is selected to weld piston crown periphery and piston skirt periphery, shape
At auxiliary weld seam, enhance the reliability of welding.
In conjunction with attached drawing 1-4, the utility model discloses a kind of welded type entirety forging steel pistons, including piston made of forging
Head 1 and piston skirt 2, piston crown 1 are fixedly connected with piston skirt 2；Envelope is formed between piston crown 1 and piston skirt 2
The cooling oil chamber 3 closed, cooling oil chamber 3 are communicated by fuel feed hole 4, oil outlet 5 with outside；1 bottom end of piston crown has been arranged concentrically
Weld shoulder A6 and external welding shoulder A7 in annular, 2 top of piston skirt be arranged concentrically respectively with interior welding shoulder A6 and external welding shoulder
Welding shoulder B8 and external welding shoulder B9, interior welding shoulder A6 are welded with interior welding shoulder B8 by friction welding (FW) in the matched annulars of A7,
Form main weld 10；External welding shoulder A7 and external welding shoulder B9 is welded by melting welding, forms auxiliary weld seam；
In order to advanced optimize above-mentioned technical proposal, quenched and tempered steel or Micro Alloying steel forging are selected in piston crown 1 and piston skirt 2
It makes, quenched and tempered steel selects 42CrMo, non-hardened and tempered steel to select 38MnVS6.
In order to advanced optimize above-mentioned technical proposal, fuel feed hole 4 and fuel-displaced is arranged in 3 bottom of cooling oil chamber in piston skirt 2
Hole 5 enables the cooling medium in cooling oil chamber 3 to be connected to the circulating cooling system of engine, more preferable to be carried out to piston
Cooling.
In order to advanced optimize above-mentioned technical proposal, main weld 10 welds to be formed using 45 tons of friction-welding machines, 45 tons of frictions
Welding machine maximum upset force 390KN, maximum weld area 4100mm2, the requirement to friction-welding machine power is reduced, to make large-diameter
Piston can use the friction-welding machine of lower-wattage to weld, and reduce the input of equipment, expand the use scope of equipment.
In order to advanced optimize above-mentioned technical proposal, auxiliary weld seam includes top surface auxiliary weld seam 11 and outer circle auxiliary weld seam
12, top surface auxiliary weld seam 11 is mainly used for reinforcing the quality of connection of piston crown 1 and piston skirt 2, and outer circle auxiliary weld seam 12 rises
To the effect of support piston ring.
In order to advanced optimize above-mentioned technical proposal, top surface auxiliary weld seam 11 is welded using electron-bombardment welding, is welded
It is 300mm/ minute to connect speed, and using twice of welding procedure, high pressure 80KV, first pass preheating, welding line is 15mA, second time
Welding line is determined according to the depth of weld, to improve welding quality.
In order to advanced optimize above-mentioned technical proposal, outer circle auxiliary weld seam 12 is formed using argon arc welding welding, due to outer circle
It is relatively low to locate temperature, outer circle auxiliary weld seam 12 only plays the role of supporting piston ring, relatively low to level weld seam requirement, selects argon arc welding,
Equipment investment is reduced, cost is reduced.
In conjunction with attached drawing 5, a kind of manufacturing process of welded type entirety forging steel piston of the utility model includes the following steps：
S1 selections：According to technological requirement, the satisfactory modulation steel of diameter or non-modulation rod iron material are selected, with sawing machine to stick
Material carries out cutting stock, and quenched and tempered steel selects 42CrMo, non-hardened and tempered steel to select 38MnVS6；
S2 hot-working：According to technological requirement, heating time is determined, be heated to the bar after cutting with electromagnetic induction furnace
1120-1250℃；
S3 is forged：Bar after being heated using 400 tons of hydraulic press rough forges, it is upset, billet surface oxide skin is removed, is used
1000 tons of electric screw press carry out finish forge to the piston crown blank and piston skirt blank of completing rough forge, are wanted according to technique
It asks determining finish forge number and each finish forge to use the size of pressure, obtains piston crown blank and piston skirt blank；
S4:Roughing：Cooling oil chamber top surface is processed in piston crown blank, welds shoulder A and external welding shoulder A in annular,
Cooling oil chamber bottom surface is processed in the blank of piston skirt, welds shoulder B and external welding shoulder B in annular；Obtain piston crown semi-finished product
With piston skirt semi-finished product；
S5 is welded：Using friction-welding machine to the piston crown semi-finished product and piston skirt semi-finished product progress friction welding (FW) after finish forge
It connects, interior welding shoulder A and interior welding shoulder B welds to form main weld using 45 tons of friction-welding machines, 45 tons of friction-welding machine maximum upset forces
390KN, maximum weld area 4100mm2；External welding shoulder A and external welding shoulder B is welded by melting welding, forms auxiliary weld seam；
Auxiliary weld seam includes top surface auxiliary weld seam and outer circle auxiliary weld seam；Wherein top surface auxiliary weld seam using electron-bombardment welding weld and
At, speed of welding is 300mm/ minutes, and using twice of welding procedure, high pressure 80KV, first pass preheating, welding line is 15mA,
Second time according to depth of weld determination welding line；Outer circle auxiliary weld seam is formed using argon arc welding welding.
S6 post-productions：Piston after welding is heat-treated, is finished, is surface-treated and finally obtains piston finished product.
In order to advanced optimize above-mentioned technical proposal, in heat treatment process, for the piston using quenched and tempered steel forging, first plus
Heat arrives 845-855 DEG C, oil cooling after coming out of the stove after then keeping the temperature 2-3 hours, and temperature is 590-620 DEG C, keeps the temperature 3-4 hours, most
After come out of the stove it is air-cooled；For the piston using non-hardened and tempered steel forging, only make annealing treatment, to remove stress.
In order to advanced optimize above-mentioned technical proposal, finish：By the Piston Machining through Overheating Treatment go out piston annular groove,
Pin hole, outer round face；The surface treatment：Piston face after finishing is subjected to phosphatization and graphitization processing.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (6)
1. a kind of welded type entirety forging steel piston, including piston crown and piston skirt made of forging, the piston crown and
The piston skirt is fixedly connected；Closed cooling oil chamber is formed between the piston crown and the piston skirt, it is described cold
But oil pocket is communicated by fuel feed hole, oil outlet with outside；It is characterized in that, the piston crown bottom end has been arranged concentrically in annular
Weld shoulder A and external welding shoulder A, the piston skirt top be arranged concentrically respectively with the interior welding shoulder A and the external welding
Welding shoulder B and external welding shoulder B in the matched annulars of shoulder A, the interior welding shoulder A are carried out with the interior welding shoulder B by friction welding (FW)
Welding forms main weld；The external welding shoulder A is welded with the external welding shoulder B by melting welding, and auxiliary weld seam is formed.
2. a kind of welded type entirety forging steel piston according to claim 1, which is characterized in that the piston crown and described
Piston skirt selects quenched and tempered steel or non-hardened and tempered steel forging, quenched and tempered steel that 42CrMo, non-hardened and tempered steel is selected to select 38MnVS6.
3. a kind of welded type entirety forging steel piston according to claim 2, which is characterized in that the piston skirt is in described
The fuel feed hole and the oil outlet is arranged in cooling oil chamber bottom.
4. a kind of welded type entirety forging steel piston according to claim 1, which is characterized in that the auxiliary weld seam includes top
Face assists weld seam and outer circle to assist weld seam.
5. a kind of welded type entirety forging steel piston according to claim 4, which is characterized in that the top surface auxiliary weld seam is adopted
It is welded with electron-bombardment welding, speed of welding is 300mm/ minutes, using twice of welding procedure, high pressure 80KV, first pass
Preheating, welding line are 15mA, and second time according to depth of weld determination welding line.
6. a kind of welded type entirety forging steel piston according to claim 4, which is characterized in that the outer circle auxiliary weld seam is adopted
It is formed with argon arc welding welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820463747.4U CN208089422U (en) | 2018-04-03 | 2018-04-03 | A kind of welded type entirety forging steel piston |
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| CN201820463747.4U CN208089422U (en) | 2018-04-03 | 2018-04-03 | A kind of welded type entirety forging steel piston |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331677A (en) * | 2018-04-03 | 2018-07-27 | 滨州东海龙活塞有限公司 | A kind of welded type entirety forging steel piston and its manufacturing process |
| CN111173638A (en) * | 2020-01-17 | 2020-05-19 | 滨州东海龙活塞有限公司 | Penetration welding type forged steel piston and machining method thereof |
| CN112548506A (en) * | 2020-12-11 | 2021-03-26 | 湖南江滨机器（集团）有限责任公司 | Remanufacturing method of steel piston |
-
2018
- 2018-04-03 CN CN201820463747.4U patent/CN208089422U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331677A (en) * | 2018-04-03 | 2018-07-27 | 滨州东海龙活塞有限公司 | A kind of welded type entirety forging steel piston and its manufacturing process |
| CN108331677B (en) * | 2018-04-03 | 2024-05-28 | 滨州东海龙活塞有限公司 | Welded integral forging steel piston and manufacturing process thereof |
| CN111173638A (en) * | 2020-01-17 | 2020-05-19 | 滨州东海龙活塞有限公司 | Penetration welding type forged steel piston and machining method thereof |
| CN112548506A (en) * | 2020-12-11 | 2021-03-26 | 湖南江滨机器（集团）有限责任公司 | Remanufacturing method of steel piston |
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