CN102384264A - Cast iron ring carrier used for aluminum piston and manufacturing method thereof - Google Patents
Cast iron ring carrier used for aluminum piston and manufacturing method thereof Download PDFInfo
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- CN102384264A CN102384264A CN2011103618229A CN201110361822A CN102384264A CN 102384264 A CN102384264 A CN 102384264A CN 2011103618229 A CN2011103618229 A CN 2011103618229A CN 201110361822 A CN201110361822 A CN 201110361822A CN 102384264 A CN102384264 A CN 102384264A
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- circle
- piston
- ring carrier
- edge circle
- cast iron
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Abstract
The invention discloses a cast iron ring carrier used for an aluminum piston and a manufacturing method thereof. The cast iron ring carrier comprises a ring body and a convex support table which is arranged on the excircle of the ring body and integrally molded with the ring body, wherein uniformly distributed internal teeth are arranged on the inner circle of the ring body; and the end face of the internal teeth is one of triangle, isosceles trapezoid, rectangle or dovetail in smooth transition at the closed angle. Precious nickel is not used in the components of the ring carrier, and other wear-resistant metal materials are added. The blank of the ring carrier is sand cast by an automatic molding machine in stack molding, and the shot-blasting treatment is carried out. The ring carrier has unique structure and strong bonding force with an aluminum substrate of the aluminum piston, so that the deformation and casting-off of the aluminum piston at high temperature are prevented, and the bonding force of the ring carrier and aluminum can be improved. The ring carrier adopts preferred alloy ratio and does not contain precious nickel, so that the production cost is lowered. The casting and machining stress of the manufacturing method is smaller than that of the centrifugal casting, and the high-temperature volume stability of the piston can be improved.
Description
Technical field
The present invention relates to the edge circle that a kind of piston is used, especially a kind of aluminium piston is with structure, component and the production method thereof of plain cast iron edge circle.
Background technique
Severe day by day along with domestic and international energy-saving and emission-reduction situation is to reduce engine emission and one of approach that reduces the fuel oil consumption through the weight that reduces the aluminium piston.In order to increase the intensity of aluminium piston, improve the life-span of piston, generally need increase by a high-intensity edge circle at the head of piston.At present, adopt high-nickel austenite edge circle in the industry mostly, linear expansion coeffcient>=18 * 10 that this edge circle is 20～200 ℃
-6, approaching with aluminum alloy, so high-nickel austenite edge circle is to combine edge circle preferably with the aluminium piston.But because this edge circle must add a large amount of nickel, so the cost of raw material of this edge circle and manufacture cost are very high, the cost of material valency is about 18.3 ten thousand/ton at present; And make most of need of this edge circle and adopt centrifugal casting, the residual stress of foundry goods is bigger, and high-nickel austenite is inlayed the machinability extreme difference of circle simultaneously, and these shortcomings have formed obstacle for the piston industry reduces cost with promoting engine performance.If adopt common alloy cast iron casting edge circle, the cost of common alloy cast iron edge circle is lower, is about 7000 yuan/ton, and can adopt sand casting process, full-automatic moulding machine multiple mould, has practiced thrift material than centrifugal casting.But well-known, the linear expansion coeffcient of alloy cast iron is 12 * 10
-6About, than the linear expansion coeffcient 19～21 * 10 of aluminum alloy
-6Low, and, influenced the combination force of edge circle and aluminium piston only because edge circle is the circular shape structure, make being embedded on the aluminium piston only that the edge circle can not be firm, after using after a while, might cause and inlay the distortion of enclosing even come off from the aluminium piston only.
Summary of the invention
The technical problem that the present invention will solve provides a kind ofly can cylinder iron inlay circle and production method thereof with aluminium piston strong bonded, favorable working performance and the aluminium piston that can reduce manufacture cost.
For solving the problems of the technologies described above; The technological scheme that product of the present invention is taked is: a kind of aluminium piston is cylinder iron inlayed circle; Comprise the circular shape body and be positioned on the circular shape body cylindrical and the support platform integrated convexity of circular shape body, offer equally distributed internal tooth on the interior circle of said circular shape body; The end surface shape of said internal tooth is the wherein a kind of of sharp corner slick and sly excessive triangle, isosceles trapezoid, rectangle or swallow-tail form.
The material that described aluminium piston is cylinder iron inlayed circle contains the component of following weight percent: C 3.4～4.0%, and Si 1.8～2.7%, and Mn 0.5～1.0%; P 0.25～0.50%, and S 0.015～0.025, and Cr 0.2～0.5%; Cu 0.2～0.5%, and Ti 0.1～0.25%, and surplus is Fe.
Above-mentioned aluminium piston is cylinder iron inlayed the production method of circle, comprises following process:
(1) said each component is put into the frequency conversion electric furnace and carry out melting, at the uniform velocity heat up; Through twice inoculated, total pregnant amount is 0.2～0.4% after the temperature; It is overheated to continue then to be warming up to, and 1500 ℃ of tapping temperatures, pouring temperature are 1380～1420 ℃;
(2) on automatic moulding machine, use sand casting process, adopt multiple mould;
(3) to the Shot Blasting of edge circle blank, remove surperficial scab, and carry out stress removing;
(4) to the machining of edge circle, polish both ends of the surface, and remove the wedge angle burr;
(5) once more the edge circle is carried out Shot Blasting, carry out the physics corrosion protection then and handle.
Adopt the beneficial effect that technique scheme produced to be:
(1) the present invention inlays the coil structures uniqueness; Edge circle inwall is provided with irregular profile of tooth; The outer surface of aluminium piston also can form concavo-convex profile of tooth when producing the aluminium piston; The internal tooth of edge circle and the aluminum substrate of aluminium piston can form very strong combination force, have reduced the distortion of aluminium piston when high temperature, and have prevented the knocking over phenomenon in the using process.
(2) the present invention's material of inlaying circle adopts preferred alloy proportion, does not contain valuable nickel, and adds wear-resisting alloying element, can satisfy each item function and the performance of aluminium piston.Adopt the proportioning of cast iron composition of the present invention, the linear expansion coeffcient of edge circle is 16～18 * 10-6, and is approaching with the linear expansion coeffcient of aluminum alloy.Owing to adopted specific alloy cast iron edge circle, make the cutting ability of aluminium piston in machining process greatly improve, reduced the consumption of machining tool, can save about 6 yuan of cutter expense.The present invention inlays circle and compares with high-nickel austenite edge circle, can reduce the about 8 yuan/sheet of production cost of material, as if 2,000,000 of whole year production aluminum piston blanks, can reduce by 1,600 ten thousand yuan of buying expenseses, greatly reduces cost of production.
(3) production method of the present invention is full-automatic moulding machine sand casting process, and casting and machining stress are far smaller than centrifugal casting, can improve the high volume stability of piston, can reach very high tension, resistance to flexure and wear-resisting property.
The present invention inlays circle can not only satisfy the service behaviour of piston under normal temperature and high temperature, has also reduced the manufacture cost of aluminium piston, has reduced the weight of piston simultaneously, and then has reduced the fuel oil consumption.
Description of drawings
Fig. 1 is the embodiment of the invention 1 structural representation;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of the embodiment of the invention 2;
Fig. 4 is the structural representation of the embodiment of the invention 3;
Fig. 5 is the structural representation of the embodiment of the invention 4;
Wherein, 1, support platform; 2, circular shape body; 3, internal tooth.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
This aluminium piston is cylinder iron inlayed the structure of circle referring to accompanying drawing 1 and accompanying drawing 2; Aluminium piston in the present embodiment is with comprising a circular shape body 2 in the edge coil structures; Intermediate portion on these circular shape body 2 cylindricals is provided with the support platform 1 of the annular of a protrusion, and said support platform 1 is integrally casting moulding with circular shape body 2.The interior circle of circular shape body 2 is the internal tooth 3 that is uniformly distributed with, and the end surface shape of internal tooth 3 is a triangle among this embodiment, and the equal fillet in each angle of this triangle is excessive, and is relatively milder.The edge circle of present embodiment is applicable to the aluminium piston of piston diameter less than 100mm.
The material of the cast iron edge circle of present embodiment is selected the content of suitable carbon, silicon, manganese, phosphorus, sulphur, chromium, copper, and the concrete weight percentage of each composition is referring to table 1, and wherein the surplus among each embodiment is Fe.
The production method that the aluminium piston of present embodiment is cylinder iron inlayed circle comprises processes.
(1) said ratio is suitable raw material are put into one ton of frequency conversion electro-smelting, and carry out inoculated twice, add inovulant, and total pregnant amount is 0.2～0.4%, and it is overheated to continue then to be warming up to, and 1500 degree are come out of the stove, pouring temperature 1380～1420 degree.
(2) on automatic moulding machine, adopt the sand mold multiple mould, pour into a mould then.
(4) to the edge circle blank Shot Blasting of gained, remove surperficial scab, and carry out stress removing.
(5) to the machining of edge circle, polish both ends of the surface.
(6) the edge circle is carried out surface treatment and remove the wedge angle burr.
(7) once more the edge circle is carried out Shot Blasting.
(8) the edge circle is carried out the physics corrosion protection and handle, prevent that it from getting rusty.
(9) Jiang Xiangquan is put in the full-automatic casting machine, the cast aluminum piston.
The mechanical property of the edge circle of present embodiment is (1) tensile strength: 205Mpa; (2) resistance to flexure: 354 Mpa; (3) metallographic structure is 5 grades in a graphite, and matrix is a pearlite; (4) hardness is 98 HRB; (5) edge circle combination force is 17.2 Mpa; (6) piston is at the volume stability 0.019% of high temperature.It can satisfy the usage requirement of piston fully.
The structure of embodiment 2 edge circle and embodiment 1 structure are basic identical, different places be that the shape of internal tooth 3 is different.Referring to accompanying drawing 3, among the embodiment 2 internal tooth be shaped as isosceles trapezoid, also be round-corner transition between every adjacent two limits of isosceles trapezoid.The edge circle of this structure is applicable to that piston diameter is the aluminium piston of 100～130mm.
The weight percentage of the material of the cast iron edge circle of present embodiment is referring to table 1, and production method is with embodiment 1; Mechanical property is referring to table 2, and other performance or metallographic structure are identical with embodiment 1.
The structure of the edge circle of present embodiment and embodiment 1 difference are that the shape of internal tooth 3 is different.Referring to accompanying drawing 4, the end surface shape of internal tooth 3 is a rectangle in the present embodiment, also is round-corner transition between every adjacent two limits of rectangle.The edge circle of this structure is applicable to the aluminium piston of piston diameter 130～150mm.
The weight percentage of the material of the cast iron edge circle of present embodiment is referring to table 1, and production method is with embodiment 1; Mechanical property is referring to table 2, and other performance or metallographic structure are identical with embodiment 1.
Embodiment 4
The structure of the edge circle of present embodiment and embodiment 1 difference are that the shape of internal tooth 3 is different.Referring to accompanying drawing 5, the end surface shape of internal tooth 3 is a swallow-tail form in the present embodiment, also is round-corner transition between every adjacent two limits of swallow-tail form.The edge circle of this structure is applicable to the aluminium piston of piston diameter greater than 150mm.
The weight percentage of the material of the cast iron edge circle of present embodiment is referring to table 1, and production method is with embodiment 1; Mechanical property is referring to table 2, and other performance or metallographic structure are identical with embodiment 1.
Embodiment 5～7
Embodiment 5,6 is identical with embodiment 2,3,4 respectively with 7 structure.
The weight percentage of the material of the cast iron edge circle of present embodiment is referring to table 1, and production method is with embodiment 1; Mechanical property is referring to table 2, and other performance or metallographic structure are identical with embodiment 1.
Each embodiment's of table 1 chemical composition, hardness and metallographic structure
Each embodiment's of table 2 mechanical property
Above-mentioned seven embodiments' mechanical property all satisfies the usage requirement of piston; Further prove that through production testing in batches the mechanicalness of the edge circle that this edge of employing coil structures, chemical composition and production method are produced all can reach following requirement, can satisfy the service condition of piston fully:
(1) tensile strength 190～210 Mpa; (2) resistance to flexure 339～357 Mpa; (3) metallographic structure: 5 grades in graphite, matrix are pearlite; (4) hardness is 94～105 HRB; (5) edge circle combination force is 17～20 Mpa; (6) piston is at the volume stability 0.019% of high temperature.
Claims (3)
1. an aluminium piston is cylinder iron inlayed circle; Comprise circular shape body (2) and be positioned on circular shape body (2) cylindrical and support platform (1) the integrated convexity of circular shape body (2), it is characterized in that: offer equally distributed internal tooth (3) on the interior circle of said circular shape body (2); The end surface shape of said internal tooth (3) is the wherein a kind of of sharp corner slick and sly excessive triangle, isosceles trapezoid, rectangle or swallow-tail form.
2. the described aluminium piston of claim 1 is cylinder iron inlayed circle, it is characterized in that its material contains the component of following weight percent: C 3.4～4.0%, and Si 1.8～2.7%; Mn 0.5～1.0%, and P 0.25～0.50%, and S 0.015～0.025; Cr 0.2～0.5%; Cu 0.2～0.5%, and Ti 0.1～0.30%, and surplus is Fe.
3. the described aluminium piston of claim 2 production method of cylinder iron inlaying circle is characterized in that comprising following process:
(1) said each component is put into the frequency conversion electric furnace and carry out melting, at the uniform velocity heat up; Through twice inoculated, total pregnant amount is 0.2～0.4% after the temperature; It is overheated to continue then to be warming up to, and 1500 ℃ of tapping temperatures, pouring temperature are 1380～1420 ℃;
(2) on automatic moulding machine, use sand casting process, adopt multiple mould;
(3) to the Shot Blasting of edge circle blank, remove surperficial scab, and carry out stress removing;
(4) to the machining of edge circle, polish both ends of the surface, and remove the wedge angle burr;
(5) once more the edge circle is carried out Shot Blasting, carry out the physics corrosion protection then and handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110361822.9A CN102384264B (en) | 2011-11-16 | 2011-11-16 | Cast iron ring carrier used for aluminum piston and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110361822.9A CN102384264B (en) | 2011-11-16 | 2011-11-16 | Cast iron ring carrier used for aluminum piston and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102384264A true CN102384264A (en) | 2012-03-21 |
| CN102384264B CN102384264B (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110361822.9A Active CN102384264B (en) | 2011-11-16 | 2011-11-16 | Cast iron ring carrier used for aluminum piston and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401067A (en) * | 2015-12-01 | 2016-03-16 | 铜陵奥盛冶金机械有限公司 | Low-density and high-wear-resistant cast iron material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2410140A1 (en) * | 1974-03-02 | 1975-09-11 | Kloeckner Humboldt Deutz Ag | Light alloy pistons for IC engines - have inset piston ring holders of truncated cone design |
| US5323883A (en) * | 1988-09-20 | 1994-06-28 | Nissan Motor Company, Limited | Friction device |
| EP0775542A1 (en) * | 1995-11-24 | 1997-05-28 | Izumi Industries Ltd. | Ring carrier for pistons and method for casting pistons using the same |
| CN200967082Y (en) * | 2006-06-15 | 2007-10-31 | 山东省滨州市特种合金有限公司 | Wear-resistant inlayed ring offsetting the locating platform |
| EP1875977A1 (en) * | 2006-07-05 | 2008-01-09 | KS Kolbenschmidt GmbH | Ring insert cooling duct interconnection |
| CN201507643U (en) * | 2009-04-05 | 2010-06-16 | 苏道胜 | A novel aluminium piston abrasion resistant inlay circle |
-
2011
- 2011-11-16 CN CN201110361822.9A patent/CN102384264B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2410140A1 (en) * | 1974-03-02 | 1975-09-11 | Kloeckner Humboldt Deutz Ag | Light alloy pistons for IC engines - have inset piston ring holders of truncated cone design |
| US5323883A (en) * | 1988-09-20 | 1994-06-28 | Nissan Motor Company, Limited | Friction device |
| EP0775542A1 (en) * | 1995-11-24 | 1997-05-28 | Izumi Industries Ltd. | Ring carrier for pistons and method for casting pistons using the same |
| CN200967082Y (en) * | 2006-06-15 | 2007-10-31 | 山东省滨州市特种合金有限公司 | Wear-resistant inlayed ring offsetting the locating platform |
| EP1875977A1 (en) * | 2006-07-05 | 2008-01-09 | KS Kolbenschmidt GmbH | Ring insert cooling duct interconnection |
| CN201507643U (en) * | 2009-04-05 | 2010-06-16 | 苏道胜 | A novel aluminium piston abrasion resistant inlay circle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401067A (en) * | 2015-12-01 | 2016-03-16 | 铜陵奥盛冶金机械有限公司 | Low-density and high-wear-resistant cast iron material |
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| CN102384264B (en) | 2014-03-26 |
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