CN108779738A - The forging piston oil duct of complicated shape - Google Patents
The forging piston oil duct of complicated shape Download PDFInfo
- Publication number
- CN108779738A CN108779738A CN201780017022.0A CN201780017022A CN108779738A CN 108779738 A CN108779738 A CN 108779738A CN 201780017022 A CN201780017022 A CN 201780017022A CN 108779738 A CN108779738 A CN 108779738A
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- China
- Prior art keywords
- protrusion
- piston
- endless belt
- combustion bowl
- forging
- Prior art date
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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
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
- F02B23/0681—Square, rectangular or the like profiles
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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
- F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
-
- 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
- F02F2200/00—Manufacturing
- F02F2200/04—Forging of engine parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A kind of piston for internal combustion engine, including cooling duct and complicated burning surface are provided.Piston includes the top hat component that lower member is for example connected to by mixing induction welding.Complicated combustion bowl is formed by forging to be preced in component on top.Combustion bowl includes at least one protrusion, and generally includes the multiple protrusions being separated from each other.After forging step and before Connection Step, opposite with the space between protrusion, top bottom surface part is machined, and the part directly opposite with protrusion is kept into as-forged condition.Hat component is for example connected to lower member by mixing induction welding.
Description
Cross reference to related applications
This application claims the equity for the American invention number of applying for a patent 15/078,813 that on March 23rd, 2016 submits, complete
Portion's content is incorporated by reference into herein.
Technical field
The present invention generally relates to the piston of internal combustion engine, especially diesel engine, relate more specifically to that there is oil
The piston in road.
Background technology
In internal combustion engine use, especially for diesel engine, it is known that provided for piston and be formed with cooling oil
And the main body of the closed channel set.Oil is easy by channel cycle and the part of cooling piston, these parts by the combustion heat
Damage.Outer rim around piston combustion bowl is particularly easy to damage in overheat.
Cooling duct is typically cyclic annular or annular, has constant cross section, and be arranged in piston endless belt simultaneously
And the roof and outer rim of adjacent piston body.It is defined by the inner wall close to combustion bowl in the channel.Oil duct can be unlimited can also
It is closed.If it is closed, channel is closed in bottom by bottom wall.For closed channel, can be set into the bottom wall
Mouthful, for receiving cooling oil in channel, or cooling oil can be supplied to channel by other devices.
Traditionally, the combustion bowl of diesel engine is with circular symmetry and with from outer rim to depressed central part
Smooth uninterrupted surface.However, today, new bowl is designed to the shape for having non-traditional or complicated.It should be appreciated that these non-biographies
Shape of uniting is for more effectively burning fuel and has less bad discharge.However, complicated bowl shape makes traditional work
The cooling of the bowl and outer rim of filling in channel is more difficult.Will not be provided using the tradition machining of turning operation is had and complex shape
The combustion bowl of shape is similar or the oil duct of corresponding complicated shape.
If the architectural difference between combustion bowl and oil duct generates the wall with significant different-thickness, or too thick wall is not
The oil that can be recycled in oil duct is fully cooled, it would be possible that " the heat in piston occurs in the place that may be overheated in the material
Point ".Hot spot region may generate weak spot in piston, and material may be ruptured or be failed at this.If piston breaks down,
Engine failure is then will produce, so as to cause more expense, and the new engine of vehicle may be needed.
Invention content
One aspect of the present invention provides a kind of piston for internal combustion engine, which is formed with complicated combustion bowl and sets
Meter, to reduce problems of excessive heat.Piston include from the top for the endless belt that outer rim is dangled, and from the outer rim opposite with endless belt to
The combustion bowl of interior pendency.Combustion bowl includes at least one protrusion, and is typically circumferentially separated from one another around central axis
Multiple protrusions.The lower member of piston includes being connected to the endless belt lower part on endless belt top.Lower member further includes from ring
The side wall of shape band pendency, and side wall is separated from each other by the pin bosses with pin hole.
Another aspect of the present invention provides a kind of method of manufacture piston.This method includes providing top to be preced with component, on this
Portion's hat component include the outer rim around central axis circumferentially extending, the combustion bowl inwardly dangled from outer rim and from combustion bowl phase
To outer rim pendency endless belt top.Combustion bowl includes at least one protrusion.This method further includes providing lower member, under this
Portion's component includes endless belt lower part and the side wall that dangles from endless belt, and side wall is spaced by the pin bosses with pin hole
It opens；And endless belt lower part is connected to endless belt top.
Description of the drawings
When combining features as discussed above to consider, these and other features and excellent of the present invention will be better understood
Point, wherein：
Fig. 1 shows the piston with closing oil duct of an exemplary embodiment.
Fig. 2A, 2B and 2C schematically show three examples of complicated combustion bowl.
Fig. 3 is the schematic plan view of piston head, depicts the representative complex shape of combustion bowl.
Fig. 4 is along line 4-4 and the cross section of piston head as shown in Figure 1 that intercepts in the direction of the arrow.
Fig. 5 be after at least one surface of machining turning oil duct, similar to Fig. 4 piston head another is transversal
Face.
Fig. 6 is the flow chart of the embodiment of the system and method for the present invention.
Fig. 7 is the stereogram of the piston including combustion bowl with complex shape of another exemplary embodiment.
Fig. 8 is cross section of the top hat component of the piston of Fig. 7 before being connected to lower member.
Fig. 9 is the cross-sectional view of the piston of Fig. 7 after top hat component to be connected to lower member.
Figure 10 is the flow chart of the exemplary method for the piston for being used to form Fig. 7.
Specific implementation mode
As shown in Figure 1, if combustion bowl is with complex shape, the representative piston 100 of the present invention can be used.Piston
100 include piston head component 10 and lower member 102, and lower member 102 includes side wall 104 and pin bosses 106.Piston head
10 and lower member 102 be preferably rigidly secured together by friction welding, to form complete piston 100.
There is piston 100 oil duct, oil to recycle wherein, so as to by the temperature of piston, especially upper surface, combustion bowl and outer rim
Degree is maintained in acceptable temperature limiting.Oil duct includes the oil duct channel 105 being located in hat component 10.As known in the art
, oil duct can be either open or closed.If closing, the bottom wall of oil duct are included in usually as a part for lower member 102
It is interior.
The piston head component 10 of representative complexity combustion bowl 12 is shown in FIG. 3.The shape of bowl 12 substantially has
There are four the square shapes of side 15,16,17 and 18.In the shape shown in, side is straight, has fillet 21,22,23
With 24.
It should be appreciated that the shape of combustion bowl and the linear of side 15-18 are only an example of complicated combustion bowl.According to
The present invention, combustion bowl can have any periphery or interior shape, have any amount of side or lateral parts.Side and Nei Biao
Face can also have any shape, such as be as shown in the figure that pen is straight or curved or arc, and can have it is straight,
Bending or arc part (section or portion), or with protuberance, protrusion, recess, rib etc..In addition, corner 21-
Infall or connector between 24 or side can have any shape, and can protrude through in bowl or be recessed from bowl.
As shown in Figure 2 A, the shape of piston cup can be complicated in its periphery, as shown in Figure 2 B, in the inner radial of bowl
Region is complicated, or is all complicated relative to periphery and interior zone as shown in Figure 2 C.Fig. 2A, 2B and 2C represent this
The complicated shape combustion bowl of three kinds of general types.The present invention provides a kind of oil ducts and oil duct channel, can accommodate with this
The combustion bowl of kind complicated shape.
Piston head and entire piston are made of steel.The shape of piston head 10 is formed by forging technology.
Exemplary embodiment according to the present invention, the oil duct channel in piston head pass through identical with combustion bowl or part thereof
Technique is made.In an illustrated embodiment, oil duct channel is manufactured by forging technology, is then machined out technique.
Accoding to exemplary embodiment, the forging die for being used to form the forging die of combustion bowl and being used to form oil duct channel has accordingly
Shape.Two molds have similar straight line portion and the similar bending part to correspond to each other.
The cross section of piston head 10 after forging process is shown in FIG. 4.Forging technology forms annular groove 30,
Need not have even circumferential width " W " or uniform depth " D ".In the side of the combustion bowl part farthest from the outer surface of piston head
In, the width bigger of groove 30.These regions are indicated by the number 40 in Fig. 3.Similarly, the most narrow region of groove 30 is located at side
Corner between portion or infall.
The depth D of the groove 30 made of forging depends on the mold used in forging technology.Forging mold can penetrate
There is practical limitation in the depth that steel is preced with component, and still may be reused before needing replacing or renovating.
The subsequent step of formation oil duct as exemplary embodiment according to the present invention, the shape of oil duct are machined to figure
Shape shown in 5.In a step of machining processes, the machinery tools indicated by component 50 are inserted through forging technology shape
At oil duct 30 in (along the direction of arrow 52), and for polish oil duct channel outer surface and formed entirely around bowl annular
Groove 60.The upstream that oil duct channel is extended into piston head by this machining turning is (near top annular groove and neighbouring living
The top surface or outer rim 80 of plug).Complete mach groove 60 extends to 30 top of initial channel manufactured in forging process.
" processing turning " or only " turning " are a kind of process for machining, wherein cutting element, typically non-rotating tools,
When workpiece rotates for example on lathe linear movement." machining turning " can refer on the inner surface of workpiece or outer surface
This cutting or finishing operations.At some surfaces in the oil duct channel of machining thereon, machining turning polishing or formation
Inner surface.
Machining turning process can be additionally used in some inner surfaces for machining and polishing oil duct channel 30, such as surface 31.
It, can be by forging die in channel table in forging technology due to the complicated shape in oil duct to follow the complicated shape of combustion bowl
Multiple bendings are formed inside face.Due to the turning process used in process for machining, it is recessed in this step and grand
Region between rising does not polish and (does not machine).The roads Tu5Zhong Nei channel surface 32 and 33 does not polish and protects after forging
Hold its reset condition.
In figure 3, the periphery of the annular groove 60 of polishing is indicated by dotted line 60'.In addition, complicated shape oil duct (such as
Surface 31) inside polished surface indicated by hidden line 30'.Unpolished region (such as recess) is by the reference numeral in Fig. 5
32 and 33 indicate.Oil duct channel with shape 30 shown in Fig. 4 can be formed by forging die.
In typical forging operation, complexity will be formed in the upper surface of piston head component or upside in another forging mold
While the combustion bowl of shape, it is formed in the oil duct channel in the lower surface of piston head component 10.
The inventive process provides a kind of ring shaped oil passage for piston, have outer with the combustion bowl of complicated shape
The similar or essentially identical periphery interior shape of all shapes.This minimize the thickness of the wall region 70 between oil duct and combustion bowl 12
Degree, and make the uniform wall thickness outside combustion bowl.Due to forging the practical limitation with process for machining, the thickness of all walls exists
The circumference of combustion bowl will not be identical.However, the present invention keeps wall thickness 70 as thin as possible and uniform around entire oil duct.
The temperature on bowl wall surface and outer rim 80 is maintained in limit appropriate simultaneously by the oil that this permission is introduced into when piston polishes in oil duct
Avoid harmful hot spot.
Using the present invention, there may be the thick wall parts of hot spot for minimum or elimination.The piston area of overheat is (also referred to as
" hot spot ") it will produce the weak spot that may be ruptured or fail.Piston fails in this way may lead to expensive repair, and
It may cause more to reengine.
When wall have uniform thickness and it is relatively thin when, the preferred cooling to piston can be provided.With compared with thin-walled
Piston also there is smaller weight, this provides smaller strain to engine.Can obtain so better gasoline mileage and
Less noxious emission.
Fig. 6 presents the flow chart 108 for the illustrative methods that oil duct channel is formed in piston head, corresponds in shape
The shape of complicated combustion bowl in piston head.First, piston head component is made of steel 110.This can pass through any tradition
Manufacturing process complete.
Then, the combustion bowl of complicated shape is formed in the top or upper surface of piston head component 112.The step passes through steel
Forging technology is formed.
In the same time or later, oil duct channel 30 is formed in the lower surface or downside of piston head component, is shaped like
In or corresponding to combustion bowl shape.This shows in frame 114.The step is carried out also by forging technology, and preferably with
Forging bowl is carried out at the same time.
Finally, the oil duct channel in 116 piston head components of machining polishing, to expand its size and make it closer to piston
It is preced with the outer rim 80 of component and combustion bowl.In this step, annular groove 60 is formed by cutting element, and can be added by machine
The other surfaces (i.e. in addition to the region between recess and protuberance) in the channel of work turning operation polishing can polish as needed.
Another exemplary piston 200 with complicated combustion bowl 212 is generally shown in figures 7-9.Example piston
210 hat component 210 is manufactured by forging, to form complicated combustion bowl 212.It includes around central axis week to be preced with component 210
To the outer rim 280 of extension.Combustion bowl 212 from outer rim 280 inwardly dangle, and include extend internally from outer rim 280 it is at least one
Protrusion 226.In the exemplary embodiment of Fig. 7-9, combustion bowl 212 includes a pair of of protrusion 226 positioned opposite to each other.Or
Person, piston 200 may include greater number of protrusion 226, such as four, five to eight or up to ten protrusions 226, their edges
Outer rim 280 is circumferentially separated from one another.In the exemplary embodiment, protrusion 226 is equal sized, and protrusion 226 is spaced phase
Deng distance, and each protrusion 226 extends to the base portion of combustion bowl 212 from outer rim 280.However, protrusion 226 may include not
With size and shape, and distance not etc. can be spaced.In the exemplary embodiment of Fig. 7-9, the base portion of combustion bowl 212
It is upwardly extended from protrusion 226, to form vertex at central axis.However, combustion bowl 212 may include other shapes.The example
Cusp, and the sky between protrusion 226 is also presented in the protrusion 226 of property embodiment between outer rim 280 and the base portion of combustion bowl 212
Between concave surface is presented.
It is preced with the top bottom surface 231 that component 210 further includes opposite with combustion bowl 212.Positioned at the top opposite with protrusion 226
The part of portion's bottom surface 231 keeps as-forged condition, and the space between protrusion 226 of top bottom surface 231 is opposite
Part be machined.Machined parts are ultimately formed the part of a part for oily cooling duct 230.It is recessed including multiple annulars
It dangles from the outer rim 280 opposite with combustion bowl 212 on the top of the endless belt 228 of slot.The top of internal-rib 238 is from top bottom surface
231 extend downwardly and surround central axis.Fig. 8 is the hat component before it will be preced with component 210 and be connected to lower member 202
210 cross section.
The lower member 202 of the example piston 200 of Fig. 7-9 includes the lower part of endless belt 228, which is presented multiple rings
Connected in star and the top for being connected to endless belt 228.The lower member 202 of piston 200 further includes the lower part of internal-rib 238, is connected
It is connected to the top of internal-rib 238.In the exemplary embodiment, mixing induction welding is connected to lower member for that will be preced with component 210
202.Fig. 9 is the cross section for being preced with component 210 and lower member 202 after the concatenating step.However, it is possible to use other connection sides
Method, such as friction welding, laser welding, other welding techniques or gluing.Lower member 202 further includes extending from endless belt 228
To the lower wall 242 of internal-rib 238.Endless belt 228, lower wall 242, internal-rib 238 and top bottom surface 231 shape between them together
At cooling duct 230, cooling duct 230 is circumferentially extended around the central axis of piston 200.The lower member 202 of piston 200 is also
Include the side wall 204 to dangle from endless belt 228, and side wall 204 is spaced by intervenient pin bosses 206
It opens.Each pin bosses 206 are formed with pin hole 244.
Another aspect provides a kind of methods of example piston 200 shown in manufacture Fig. 7-9.Figure 10 is
List the flow chart of the general step of the piston 200 of manufacture exemplary embodiment.In this exemplary embodiment, this method is from forging
The metal material for making such as steel starts, and component 210 is preced with to form top.Forging step includes forming outer rim 280 and combustion bowl
212, combustion bowl 212 includes along at least one protrusion 226 circumferentially separated from one another of outer rim 280 or multiple protrusions 226.Top
Crown part 210 is also forged into the top for including endless belt 228, which dangles from the outer rim 280 opposite with combustion bowl 212.Root
According to exemplary embodiment, forging step carries out hot forging or in 750 to 950 DEG C of temperature model at a temperature of being included in higher than 950 DEG C
Enclose lower carry out warm forging.Also according to exemplary embodiment, formed during forging step after complicated combustion bowl 212, without
The further machining of combustion bowl 212.However, 280 part of outer rim machines, and combustion bowl 212 can optionally burn
It is machined in some regions of bowl 212.Lower member 202 can be formed by forging, casting or other methods.
This method further includes that machining is located at is preced with component with forging before it will be preced with component 210 and be connected to lower member 202
The part of the 210 opposite top bottom surface 231 of combustion bowl 212.In the exemplary embodiment, this method may include part
Machining top bottom surface 231 will form the part of oily cooling duct 230.Moreover, accoding to exemplary embodiment, top bottom
The machined parts on face surface 231 are located at the opposite position in space between protrusion 226.Positioned at the top opposite with protrusion 226
The part of portion's bottom surface 231 is left forging and does not machine.This method can also include machining annular around piston 200
Groove 260.As shown in figure 9, mach annular groove 260 is located near endless belt 228.
After machining steps, this method includes that top hat component 210 is connected to lower member 202.Connection Step
Include the top that the lower part of internal-rib 238 is connected to internal-rib 238, the top of endless belt 228 is connected under endless belt 228
Portion, to form cooling duct 230 between internal-rib 238, endless belt 228, lower wall 242 and top bottom surface 231.
Illustrative methods include mixing induction welding, and top hat component 210 is connected to lower member 202.Mixing sense
It includes passing through sensing heating component 202,210, and make component around central axis immediately after connection to answer welding technique
202,210 360 ° are rotated less than relative to each other.At the end of mixing induction welding step, at least one protrusion 226 or multiple
Protrusion 226 is located relative to the specific position of pin hole 244.However, including alternatively by the method that hat is connected to lower member
Other welding techniques, such as friction welding or laser welding or gluing.
Although describing the present invention about exemplary embodiment, it is too be understood that the invention is not limited thereto, because
Can wherein to carry out the change in the full scope of following claims and modification.
It is contemplated that all authority requires and all features of all embodiments can be combined with each other, as long as this combination
It will not be conflicting.
Claims (20)
1. a kind of piston, including：
Include the outer rim circumferentially extended around central axis top hat component, from outer rim dangle endless belt top, from
The combustion bowl and combustion bowl that the opposite outer rim in endless belt is inwardly dangled include at least one protrusion；
The lower member of lower part and the side wall to dangle from endless belt including endless belt, side wall are convex by the piston pin with pin hole
Platform is separated from each other, and the lower part of endless belt is connected to the top of endless belt.
2. piston according to claim 1, including multiple protrusions, the multiple protrusion surrounds central axis circumferentially each other
It is spaced apart.
3. piston according to claim 2, the top bottom surface that component includes opposite with burning surface is preced in middle and upper part,
As-forged condition, and the top on the space opposite between protrusion are kept positioned at the part of the top bottom surface on protrusion opposite
The part of bottom surface is machined.
4. piston according to claim 2, wherein protrusion is equal sized, and is spaced equal distance.
5. piston according to claim 4, concave surface is presented in each space wherein between adjacent protrusions.
6. piston according to claim 1, wherein each protrusion extends to the base portion of combustion bowl, and combustion bowl from outer rim
Base portion upwardly extended from least one protrusion, at the central axis of piston formed vertex.
7. piston according to claim 1, it includes the top bottom surface towards burning surface that component is preced in middle and upper part, on
Portion's hat component includes the top of internal-rib, which extends from top bottom surface and surround central axis, lower member packet
Include the internal-rib lower part for being connected to internal-rib top, lower member include the lower wall of internal-rib lower part is extended to from endless belt lower part, and
Internal-rib and endless belt and lower wall and top bottom surface limit cooling duct between them.
8. piston according to claim 7, middle and upper part hat component includes multiple protrusions, these protrusions surround central axis
It is circumferentially separated from one another；
Protrusion it is equal sized, and be spaced equal distance；
Each protrusion extends to the base portion of combustion bowl from outer rim；
The base portion of combustion bowl is upwardly extended from protrusion, to form vertex at central axis；
Concave surface is presented in each space between protrusion；
As-forged condition is kept positioned at the part of the top bottom surface on protrusion opposite；And
The part of the top bottom surface on the space opposite between protrusion is machined.
9. a kind of method of manufacture piston, includes the following steps：
Offer includes surrounding the top crown part for the outer rim that central axis circumferentially extends, the combustion bowl inwardly dangled from outer rim, from
The endless belt top of the outer rim pendency opposite with combustion bowl and the combustion bowl for including at least one protrusion；
The lower member of the lower part and the side wall to dangle from endless belt that include endless belt is provided, side wall passes through the piston with pin hole
Pin boss is separated from each other；And
The lower part of endless belt is connected to the top of endless belt.
10. according to the method described in claim 9, wherein provide top hat component the step of include forging one block of material, and
During forging step combustion bowl is formed at least one protrusion.
11. according to the method described in claim 10, wherein forging step be hot-forged at a temperature of being included in higher than 950 DEG C or
Warm forging is carried out at a temperature of 750 to 950 DEG C.
12. according to the method described in claim 10, wherein forging step includes being formed around central axis circumferentially to each other
The multiple protrusions separated.
13. according to the method for claim 12, middle and upper part hat includes top bottom surface, and includes machining top
The step of bottom surface, part that space between protrusion is opposite.
14. according to the method for claim 13, including make top bottom surface, opposite with protrusion part holding forging
It does not machine.
15. according to the method for claim 14, including machining annular groove along top bottom surface and surrounding piston
Extend, wherein mach annular groove is between forging part and endless belt.
16. according to the method described in claim 9, the machining wherein after forging step without combustion bowl.
17. according to the method described in claim 9, wherein Connection Step includes welding or gluing.
18. according to the method for claim 17, wherein Connection Step includes mixing induction welding.
19. according to the method described in claim 9, its middle and upper part hat component include the top bottom surface towards burning surface,
Top hat component includes the top of internal-rib, which extends from top bottom surface and surround central axis, lower member
Lower part including internal-rib, lower member include that the lower wall of internal-rib lower part is extended to from endless belt lower part；And
Connection Step includes that the lower part of internal-rib is connected to the top of internal-rib, and in internal-rib and endless belt and lower wall and top bottom
Face forms cooling duct between surface.
20. according to the method for claim 19, wherein provide top hat component the step of include forging one block of material and
It forges and forms the combustion bowl with multiple protrusions in step, these protrusions are circumferentially separated from one another around central axis；
Forging step carries out being hot-forged or carrying out at a temperature of 750 to 950 DEG C warm forging at a temperature of being included in higher than 950 DEG C；
Connection Step includes mixing induction welding；And
Further comprise the steps：
Before Connection Step, machining is located at the part of the opposite top bottom surface in space between protrusion；
Before Connection Step, the annular groove extended around top bottom surface and piston is machined, wherein mach
Annular groove is between forging part and endless belt；And
Make top bottom surface, positioned at opposite with protrusion be partially in as-forged condition and do not machine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/078,813 | 2016-03-23 | ||
| US15/078,813 US10787991B2 (en) | 2013-02-18 | 2016-03-23 | Complex-shaped forged piston oil galleries |
| PCT/US2017/023501 WO2017165471A1 (en) | 2016-03-23 | 2017-03-22 | Complex-shaped forged piston oil galleries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108779738A true CN108779738A (en) | 2018-11-09 |
| CN108779738B CN108779738B (en) | 2021-04-23 |
Family
ID=58548867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780017022.0A Active CN108779738B (en) | 2016-03-23 | 2017-03-22 | Forging piston oil duct with complex shape |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3433481A1 (en) |
| JP (1) | JP2019509432A (en) |
| KR (1) | KR20180122636A (en) |
| CN (1) | CN108779738B (en) |
| BR (1) | BR112018068791A2 (en) |
| WO (1) | WO2017165471A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB768992A (en) * | 1952-04-30 | 1957-02-27 | Mondial Piston Co | Improvements in or relating to the combustion chambers of fuel injection internal combustion engines |
| US4721080A (en) * | 1984-02-15 | 1988-01-26 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Structure of combustion chamber in diesel engine |
| US20040231631A1 (en) * | 2003-05-21 | 2004-11-25 | Rainer Scharp | Method for the production of a one-piece piston for an internal combustion engine |
| WO2011097205A2 (en) * | 2010-02-03 | 2011-08-11 | Federal-Mogul Corporation | Piston with central cooling gallery cooling feature |
| EP2489848A2 (en) * | 2011-02-18 | 2012-08-22 | Liebherr-Machines Bulle SA | Gas petrol engine |
| US20120222304A1 (en) * | 2011-03-04 | 2012-09-06 | Mahle International Gmbh | Method for the production of a piston for an internal combustion engine |
| CN105121056A (en) * | 2013-02-18 | 2015-12-02 | 费德罗-莫格尔公司 | Complex-shaped forged piston oil galleries |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8459229B2 (en) * | 2010-04-20 | 2013-06-11 | Southwest Research Institute | Piston bowl with spray jet targets |
| DE102013014346A1 (en) * | 2013-03-18 | 2014-10-02 | Mahle International Gmbh | Method for producing a piston for an internal combustion engine and piston produced by means of this method |
-
2017
- 2017-03-22 JP JP2018549928A patent/JP2019509432A/en active Pending
- 2017-03-22 EP EP17717936.3A patent/EP3433481A1/en active Pending
- 2017-03-22 CN CN201780017022.0A patent/CN108779738B/en active Active
- 2017-03-22 KR KR1020187026854A patent/KR20180122636A/en not_active Application Discontinuation
- 2017-03-22 WO PCT/US2017/023501 patent/WO2017165471A1/en active Application Filing
- 2017-03-22 BR BR112018068791A patent/BR112018068791A2/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB768992A (en) * | 1952-04-30 | 1957-02-27 | Mondial Piston Co | Improvements in or relating to the combustion chambers of fuel injection internal combustion engines |
| US4721080A (en) * | 1984-02-15 | 1988-01-26 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Structure of combustion chamber in diesel engine |
| US20040231631A1 (en) * | 2003-05-21 | 2004-11-25 | Rainer Scharp | Method for the production of a one-piece piston for an internal combustion engine |
| WO2011097205A2 (en) * | 2010-02-03 | 2011-08-11 | Federal-Mogul Corporation | Piston with central cooling gallery cooling feature |
| EP2489848A2 (en) * | 2011-02-18 | 2012-08-22 | Liebherr-Machines Bulle SA | Gas petrol engine |
| US20120222304A1 (en) * | 2011-03-04 | 2012-09-06 | Mahle International Gmbh | Method for the production of a piston for an internal combustion engine |
| CN105121056A (en) * | 2013-02-18 | 2015-12-02 | 费德罗-莫格尔公司 | Complex-shaped forged piston oil galleries |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20180122636A (en) | 2018-11-13 |
| EP3433481A1 (en) | 2019-01-30 |
| JP2019509432A (en) | 2019-04-04 |
| WO2017165471A1 (en) | 2017-09-28 |
| BR112018068791A2 (en) | 2019-01-22 |
| CN108779738B (en) | 2021-04-23 |
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