CN109210192A - A kind of all-steel piston and preparation method thereof - Google Patents
A kind of all-steel piston and preparation method thereof Download PDFInfo
- Publication number
- CN109210192A CN109210192A CN201811068473.XA CN201811068473A CN109210192A CN 109210192 A CN109210192 A CN 109210192A CN 201811068473 A CN201811068473 A CN 201811068473A CN 109210192 A CN109210192 A CN 109210192A
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- steel body
- riveting
- cooling oil
- piston
- steel
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a kind of all-steel pistons, including upper steel body and lower steel body, wherein, cooling oil chamber upper cavity is provided in the upper steel body, riveting column is provided in the upper steel body, cooling oil chamber lower chamber is provided in the lower steel body, through-hole is provided in the lower steel body, the upper steel body is fastened in the lower steel body, the cooling oil chamber upper cavity and the cooling oil chamber lower chamber form cooling oil chamber to positive sealing, the riveting column and the through-hole are interference fitted, riveting after the riveting column is inserted into the through-hole.Piston is divided into two upper steel body, lower steel body parts, solves the problems, such as all-steel piston difficult forming by all-steel piston provided by the invention.And by first by upper steel body and lower steel body elastic conjunction, then to carry out riveting integral, solves the problems, such as that all-steel piston complexity cooling oil chamber forms and its processing difficulties.The invention also discloses a kind of all-steel piston production methods.
Description
Technical field
The present invention relates to piston manufacture technology fields more particularly to a kind of all-steel piston and preparation method thereof.
Background technique
All-steel piston is the cutting edge technology of current piston technology, and conventional all-steel piston is using monoblock cast, forging, welding etc.
Mode is manufactured.The cooling oil chamber design of all-steel piston is complex, and existing there are many forming methods:
1, solid forging all-steel piston, cooling oil chamber is using two semi-circular steel-sheet type sealings, steel disc manufacture and installation
It is all relatively difficult, higher cost, and there is the risk fallen；Complicated oil pocket is difficult to by way of processing realize.
2, cast type sealing cooling oil chamber because its ceramic core be it is insoluble, be difficult to take out in oil closed cavity, need to be arranged
Technique goes out core bore, and then fabrication hole is sealed again.
3, welded type seals cooling oil chamber: welding crimping weakens oil pocket refrigerating function, the material of weld heat-affected zone
Can be poor, welding slag is difficult to clear up.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of all-steel piston, with solve all-steel piston difficult forming and
The technical issues of molding of all-steel piston complexity cooling oil chamber and its processing difficulties.Another object of the present invention is to provide a kind of complete
Steel pistons production method.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of all-steel piston, including upper steel body and lower steel body, wherein be provided with cooling oil chamber epicoele in the upper steel body
Body is provided with riveting column in the upper steel body, cooling oil chamber lower chamber is provided in the lower steel body, is arranged in the lower steel body
There is through-hole,
The upper steel body is fastened in the lower steel body, the cooling oil chamber upper cavity and the cooling oil chamber lower chamber pair
Positive sealing forms cooling oil chamber, and the riveting column and the through-hole are interference fitted, riveting after the riveting column is inserted into the through-hole
It connects.
Preferably, the magnitude of interference of above-mentioned riveting column and the through-hole is 0.2mm-0.5mm.
Preferably, above-mentioned riveting column is cylinder table before riveting.
Preferably, using local hot riveting machine riveting after above-mentioned riveting column is inserted into the through-hole.
The present invention also provides a kind of all-steel piston production method, steel body and lower steel body in production, the interior setting of the upper steel body
There is cooling oil chamber upper cavity, riveting column is provided in the upper steel body, cooling oil chamber lower chamber, institute are provided in the lower steel body
It states and is provided with through-hole in lower steel body, the upper steel body is placed on 5-8 hour in subzero environment, the lower steel body is placed on
Then 6-10 hour in hot environment not less than 300 DEG C assembles the upper steel body and the lower steel body, the upper steel body
It is fastened in the lower steel body, the cooling oil chamber upper cavity and the cooling oil chamber lower chamber form cooling oil to positive sealing
Chamber, the riveting column and the through-hole are interference fitted, riveting after the riveting column is inserted into the through-hole.
Preferably, the low temperature environment that above-mentioned subzero environment is -15 DEG C -25 DEG C.
Preferably, the above-mentioned hot environment for being not less than 300 DEG C is 500 DEG C.
It preferably, is cylinder table, a diameter of D1, D1 before above-mentioned riveting column riveting2=Rm/ (PD2), wherein Rm is
The tensile strength for the steel body material that all-steel piston uses, P are the explosion pressure that piston is born, and D is piston diameter.
Preferably, the magnitude of interference of above-mentioned riveting column and the through-hole is 0.2mm-0.5mm.
Preferably, above-mentioned upper steel body and the lower steel body are forging.
All-steel piston provided by the invention, including upper steel body and lower steel body, wherein be provided with cooling oil in the upper steel body
Chamber upper cavity is provided with riveting column in the upper steel body, cooling oil chamber lower chamber, the lower steel body is provided in the lower steel body
On be provided with through-hole, the upper steel body is fastened in the lower steel body, under the cooling oil chamber upper cavity and the cooling oil chamber
Cavity forms cooling oil chamber to positive sealing, and the riveting column and the through-hole are interference fitted, and the riveting column is inserted into the through-hole
In after riveting.
Piston is divided into two upper steel body, lower steel body parts by all-steel piston provided by the invention, solves all-steel piston molding
Difficult problem.And by first by upper steel body and lower steel body elastic conjunction, then to carry out riveting integral, solves all-steel piston
The problem of complicated cooling oil chamber molding and its processing difficulties.
All-steel piston is divided into two upper steel body, lower steel body parts by all-steel piston provided by the invention, preferred by upper steel body
It is assembled with lower steel body using interference fit, then uses advanced riveting technology, upper and lower steel body is linked into an integrated entity.The invention
It can make that the various complicated cooling oil chambers of all-steel piston are easily molded, easy processing, upper steel body, the molding of lower steel body are simple.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of upper steel body provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of lower steel body provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram after upper steel body provided in an embodiment of the present invention and lower steel body fastening；
Fig. 4 is the structural schematic diagram after upper steel body provided in an embodiment of the present invention and the riveting of lower steel body；
Fig. 5 is the flow diagram of all-steel piston production method provided in an embodiment of the present invention.
In figure 1 above -5:
Upper steel body 1, riveting column 12, riveter 13, lower steel body 2, cooling oil chamber lower chamber 21, is led to cooling oil chamber upper cavity 11
Hole 22, hollow space 23, pin hole 24.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1-Fig. 5 is please referred to, Fig. 1 is the structural schematic diagram of upper steel body provided in an embodiment of the present invention；Fig. 2 is that the present invention is real
The structural schematic diagram of the lower steel body of example offer is provided；Fig. 3 is the knot after upper steel body provided in an embodiment of the present invention and lower steel body fastening
Structure schematic diagram；Fig. 4 is the structural schematic diagram after upper steel body provided in an embodiment of the present invention and the riveting of lower steel body；Fig. 5 is the present invention
The flow diagram for the all-steel piston production method that embodiment provides.
All-steel piston provided in an embodiment of the present invention, including upper steel body 1 and lower steel body 2, wherein be provided in upper steel body 1
Cooling oil chamber upper cavity 11 is provided with riveting column 12 in upper steel body 1, cooling oil chamber lower chamber 21, lower steel is provided in lower steel body 2
Through-hole 22 is provided on body 2, upper steel body 1 is fastened in lower steel body 2, and cooling oil chamber upper cavity 11 and cooling oil chamber lower chamber 21 are right
Positive sealing forms cooling oil chamber, and riveting column 12 and through-hole 22 are interference fitted, riveting after riveting column 12 is inserted into through-hole 22.
Piston is divided into 2 two upper steel body 1, lower steel body parts, solves all steel by all-steel piston provided in an embodiment of the present invention
The problem of piston difficult forming.And by first by upper steel body 1 and lower 2 elastic conjunction of steel body, then integral, the solution that carries out riveting
Certainly all-steel piston complexity cooling oil chamber molding and its problem of processing difficulties.
All-steel piston is divided into 2 two upper steel body 1, lower steel body parts by all-steel piston provided in an embodiment of the present invention, preferred
Upper steel body 1 and lower steel body 2 are assembled using interference fit, then use advanced riveting technology, upper and lower steel body is connected into
One.The invention can make that the various complicated cooling oil chambers of all-steel piston are easily molded, easy processing, upper steel body 1, lower steel body 2 at
Type is simple.The processing of the difficulty of processing of all-steel piston, especially cooling oil chamber can be greatly lowered, various complexity cooling oil chambers are all
It can simply form.
In order to advanced optimize above scheme, the magnitude of interference of riveting column 12 and through-hole 22 is 0.2mm-0.5mm.Riveting column 12
It is cylinder table before riveting.Riveting column 12 is riveted after being inserted into through-hole 22 using local hot riveting machine.Wherein, riveting platform is not limited to
Cylinder table, rectangle, rectangle, triangle etc. other can prevent the shape axially rotated can also be with.
The embodiment of the present invention also provides a kind of all-steel piston production method, steel body 1 and lower steel body 2 in production, in upper steel body 1
It is provided with cooling oil chamber upper cavity 11, riveting column 12 is provided in upper steel body 1, is provided with cooling oil chamber lower chamber in lower steel body 2
21, through-hole 22 is provided in lower steel body 2, and upper steel body 1 is placed on 5-8 hour in subzero environment, lower steel body 2 is placed on not
Then 6-10 hour in hot environment lower than 300 DEG C assembles upper steel body 1 and lower steel body 2, upper steel body 1 is fastened on lower steel
On body 2, cooling oil chamber upper cavity 11 and cooling oil chamber lower chamber 21 form cooling oil chamber, riveting column 12 and through-hole 22 to positive sealing
Interference fit, riveting after riveting column 12 is inserted into through-hole 22.
Specifically, the low temperature environment that subzero environment is -15 DEG C -25 DEG C.Hot environment not less than 300 DEG C is 500 DEG C.Riveting
The magnitude of interference for connecing column 12 and through-hole 22 is 0.2mm-0.5mm.Upper steel body 1 and lower steel body 2 are forging.
It wherein, is cylinder table, a diameter of D1, D1 before the riveting of riveting column 122=Rm/ (PD2), wherein Rm is all steel
The tensile strength for the steel body material that piston uses, P are the explosion pressure that piston is born, and D is piston diameter.
When specific implementation:
1, piston is divided into upper steel body 1 and lower steel body 2；Part on cooling oil chamber is arranged in upper steel body 1, can carry out blocking forming
It finishes again afterwards.Part under cooling oil chamber is arranged in lower steel body 2, forms cooling oil chamber by the riveting sealing of upper and lower steel body.
2, it is D1, the cylinder table of a height of H that one is arranged in upper steel body 1 for riveting diameter；D1 is according to steel body material
Tensile strength Rm, the explosion pressure P that piston is born, piston diameter D determine, specific formula is as follows:
D12=Rm/ (PD2)
3, one and D1 matching hole D2 are set in lower steel body 2；D1 and D2 is interference fit, magnitude of interference L=0.2-
0.5mm。
When production, after upper steel body 1 and lower steel body 2 are worked into semi-finished product, upper steel body 1 is placed in -20 DEG C of low temperature environment
5-8 hours, steel body 1 was cold in guarantee, and lower steel body 2 is placed in 500 DEG C of hot environments 6-10 hours, guaranteed lower 2 heat penetration of steel body.
Then the lower steel body 2 of cold upper steel body 1 and heat penetration is assembled, after assembly, using advanced local hot riveting machine, by upper steel
Body 1 and lower steel body 2 are riveted together.
By the way that all-steel piston is divided into upper steel body 1,2 two-part structure of lower steel body, it is arranged one for riveting in upper steel body 1
A circular hole for riveting is arranged in cylinder, lower steel body 2.Using the clinching method of interference fit, by upper steel body 1 and lower steel body 2
Set cooling oil chamber connects sealing, forms cooling oil chamber.
It wherein, is cylinder table before the riveting of riveting column 12, as shown in Figure 1, upper steel body 1 includes the head of piston, and thick
Degree occupies the half of entire land thickness or more, cooling oil chamber upper cavity 11 occupy 2/3rds of cooling oil chamber with
On, at the center of upper steel body 1, rotary table column is set.Lower steel body 2 includes piston boss, has pin hole 24, and centre is hollow space
23 arrange for connecting rod and pin shaft, and lower steel body 2 is provided centrally with through-hole 22, which is connected to hollow space 23, such as
Shown in Fig. 2.Upper steel body 1 is fastened in lower steel body 2, and cooling oil chamber upper cavity 11 and cooling oil chamber lower chamber 21 form positive sealing
Cooling oil chamber, riveting column 12 and through-hole 22 are interference fitted, and riveting column 12 is inserted into through-hole 22, after rotary table column is inserted into through-hole 22
Expose a part in hollow space 23, as shown in Figure 3.Then it is riveted with part hot riveting machine, so that rotary table column exposes
That a part by stocky is formationed riveter 13, be stuck in through-hole 22, complete to rivet, as shown in Figure 4.In order to which enhancing structure connection is strong
Degree, the thickness that lower steel body 2 is located at the wall body around through-hole 22 is larger, from the side wall of through-hole 22 to the part of the side wall of cooling oil chamber
Side wall surface of the wall ratio from the side wall of cooling oil chamber to outermost part wall thickness it is big.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of all-steel piston, which is characterized in that including upper steel body and lower steel body, wherein be provided with cooling in the upper steel body
Oil pocket upper cavity is provided with riveting column in the upper steel body, cooling oil chamber lower chamber, the lower steel is provided in the lower steel body
Through-hole is provided on body,
The upper steel body is fastened in the lower steel body, and the cooling oil chamber upper cavity is with the cooling oil chamber lower chamber to just close
Envelope forms cooling oil chamber, and the riveting column and the through-hole are interference fitted, riveting after the riveting column is inserted into the through-hole.
2. all-steel piston as described in claim 1, which is characterized in that the magnitude of interference of the riveting column and the through-hole is
0.2mm-0.5mm。
3. all-steel piston as described in claim 1, which is characterized in that the riveting column is cylinder table before riveting.
4. all-steel piston as described in claim 1, which is characterized in that the riveting column uses part after being inserted into the through-hole
Hot riveting machine riveting.
5. a kind of all-steel piston production method, which is characterized in that
Steel body and lower steel body in production are provided with cooling oil chamber upper cavity in the upper steel body, are provided with riveting in the upper steel body
Column is connect, cooling oil chamber lower chamber is provided in the lower steel body, is provided with through-hole in the lower steel body,
The upper steel body is placed on 5-8 hour in subzero environment, the lower steel body is placed on to the high temperature not less than 300 DEG C
6-10 hour in environment,
Then the upper steel body and the lower steel body are assembled, the upper steel body is fastened in the lower steel body, the cooling oil
Chamber upper cavity and the cooling oil chamber lower chamber form cooling oil chamber to positive sealing, and the riveting column is matched with the through-hole interference
It closes, riveting after the riveting column is inserted into the through-hole.
6. all-steel piston production method as described in claim 1, which is characterized in that the subzero environment is -15 DEG C -25 DEG C
Low temperature environment.
7. all-steel piston production method as described in claim 1, which is characterized in that the hot environment for being not less than 300 DEG C
It is 500 DEG C.
8. all-steel piston production method as described in claim 1, which is characterized in that be cylinder before the riveting column riveting
Platform, a diameter of D1, D12=Rm/ (PD2),
Wherein, Rm is the tensile strength for the steel body material that all-steel piston uses, and P is the explosion pressure that piston is born, and D is that piston is straight
Diameter.
9. all-steel piston production method as described in claim 1, which is characterized in that the interference of the riveting column and the through-hole
Amount is 0.2mm-0.5mm.
10. all-steel piston production method as described in claim 1, which is characterized in that the upper steel body and the lower steel body are equal
For forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068473.XA CN109210192A (en) | 2018-09-13 | 2018-09-13 | A kind of all-steel piston and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068473.XA CN109210192A (en) | 2018-09-13 | 2018-09-13 | A kind of all-steel piston and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109210192A true CN109210192A (en) | 2019-01-15 |
Family
ID=64983393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811068473.XA Pending CN109210192A (en) | 2018-09-13 | 2018-09-13 | A kind of all-steel piston and preparation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4070122A (en) * | 1976-09-13 | 1978-01-24 | Tecumseh Products Company | Ball and socket joint and method of making |
| JPH11247713A (en) * | 1998-02-27 | 1999-09-14 | Hino Motors Ltd | Piston for internal combustion engine |
| JPH11294258A (en) * | 1998-04-14 | 1999-10-26 | Hino Motors Ltd | Piston for internal combustion engine and its assembling method |
| CN201326734Y (en) * | 2008-11-18 | 2009-10-14 | 湖南江滨机器（集团）有限责任公司 | Composite piston |
| CN101655155A (en) * | 2009-06-10 | 2010-02-24 | 北京中清能发动机技术有限公司 | Piston, internal combustion engine and compressor for circular slider-crank mechanism |
| CN201461120U (en) * | 2009-06-10 | 2010-05-12 | 北京中清能发动机技术有限公司 | Piston of crank circular slider mechanism of single-cylinder engine, internal combustion engine and compressor of same |
| CN102388213A (en) * | 2009-04-10 | 2012-03-21 | 费德罗-莫格尔公司 | Piston with crown cooling jet |
-
2018
- 2018-09-13 CN CN201811068473.XA patent/CN109210192A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4070122A (en) * | 1976-09-13 | 1978-01-24 | Tecumseh Products Company | Ball and socket joint and method of making |
| JPH11247713A (en) * | 1998-02-27 | 1999-09-14 | Hino Motors Ltd | Piston for internal combustion engine |
| JPH11294258A (en) * | 1998-04-14 | 1999-10-26 | Hino Motors Ltd | Piston for internal combustion engine and its assembling method |
| CN201326734Y (en) * | 2008-11-18 | 2009-10-14 | 湖南江滨机器（集团）有限责任公司 | Composite piston |
| CN102388213A (en) * | 2009-04-10 | 2012-03-21 | 费德罗-莫格尔公司 | Piston with crown cooling jet |
| CN101655155A (en) * | 2009-06-10 | 2010-02-24 | 北京中清能发动机技术有限公司 | Piston, internal combustion engine and compressor for circular slider-crank mechanism |
| CN201461120U (en) * | 2009-06-10 | 2010-05-12 | 北京中清能发动机技术有限公司 | Piston of crank circular slider mechanism of single-cylinder engine, internal combustion engine and compressor of same |
Non-Patent Citations (2)
| Title |
|---|
| 任艳萍等: "《通用航空器结构与修理》", 31 March 2017, 西北工业大学出版社 * |
| 李宁洲等: "《机车柴油机结构设计》", 31 December 1981, 中国铁道出版社 * |
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