CN204572227U - A kind of aluminum matrix composite engine piston - Google Patents
A kind of aluminum matrix composite engine piston Download PDFInfo
- Publication number
- CN204572227U CN204572227U CN201520139008.6U CN201520139008U CN204572227U CN 204572227 U CN204572227 U CN 204572227U CN 201520139008 U CN201520139008 U CN 201520139008U CN 204572227 U CN204572227 U CN 204572227U
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- piston
- carbon fiber
- winding structure
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- silicon carbide
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- Pistons, Piston Rings, And Cylinders (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The utility model discloses a kind of aluminum matrix composite engine piston, comprise high strength support frame and wear-resistant filling aluminum material; The long carbon fiber winding arrangement that described high strength support frame is coated with silicon carbide by surface forms, and comprises piston head enhancing winding structure and piston skirt pin-and-hole enhancing winding structure; In last structure, its two ends of long carbon fiber that the surface being positioned at piston head is coated with silicon carbide extend to piston skirt; In a rear structure, the long carbon fiber that the surface being positioned at piston pin hole place is coated with silicon carbide oppositely extends around piston skirt at two ends after a circle around piston pin hole, and described piston head strengthens winding structure is wrapped in described piston skirt pin-and-hole and strengthens outside winding structure; Described wear-resistant filling aluminum material is short fibre.A kind of aluminum matrix composite engine piston described in the utility model has higher mechanical strength and wear-resisting property.
Description
Technical field
The utility model relates to a kind of aluminum matrix composite engine piston, belongs to aluminum matrix composite engine piston manufacturing technology field.
Background technique
Engine piston is the important spare part of relation motor and vehicle performance, motor is when work, the temperature of piston head can reach 400 DEG C, and piston needs the high-temperature gas of instant contact knocking fuel, the temperature of instant contact can reach more than 2000 DEG C, need to bear fuel oil knocking fuel simultaneously and produce the even higher huge air pressure of 5 ~ 10 MPa, thus require that engine piston has the high and feature such as wear-resistant of intensity under the condition of high temperature.In addition, along with motor is to the future development of high-power, high pulling torque, low oil consumption, low noise, low emission, also require that engine piston has the features such as light weight, thermal expansion coefficient is little, thermal conductivity is good simultaneously.In order to the requirement making engine piston meet the above-mentioned performance such as high temperature resistant, wear-resisting, anti-corrosion, engine piston of the prior art adopts fiber reinforced aluminum matrix composites to manufacture high-power heavy-duty engine piston usually.
A kind of carbon fiber reinforced aluminum matrix piston material and preparation method thereof disclosed in Chinese patent literature CN 101775563 B, provide the preparation method of aluminum matrix composite engine piston conventional in prior art, its main technique is: short carbon fiber surface being coated with silicon carbide is preheated to 500 ~ 600 DEG C, then directly add in the molten aluminum liquid of 740 ~ 780 DEG C, be that the ultrasonic wave sensor of 20 KHz stirs the short carbon fiber that molten aluminum liquid and surface are coated with silicon carbide by frequency, make it to mix; Then the fused solution mixed being poured into preheating temperature is cast molding in the metal type dies of 150 DEG C, namely obtains finally by T6 heat treatment.
Model utility content
The utility model is made aluminum matrix composite engine piston in prior art and being improved further, provides the aluminum matrix composite engine piston that a kind of mechanical strength is higher.
For solving the problem, technical solution adopted in the utility model is as follows:
A kind of aluminum matrix composite engine piston, comprising: high strength support frame and to be coated on described high strength support frame outer and for the wear-resistant filling aluminum material of filling molding;
The long carbon fiber winding arrangement that described high strength support frame is coated with silicon carbide by surface forms, and described high strength support frame comprises piston head and strengthens winding structure and piston skirt pin-and-hole enhancing winding structure; Strengthen in winding structure at described piston head, its two ends of long carbon fiber that the surface being positioned at piston head is coated with silicon carbide extend to piston skirt; Strengthen in winding structure at described piston skirt pin-and-hole, the long carbon fiber that the surface being positioned at piston pin hole place is coated with silicon carbide oppositely extends around piston skirt at two ends after a circle around piston pin hole, and described piston head strengthens winding structure is wrapped in described piston skirt pin-and-hole and strengthens outside winding structure;
Described wear-resistant filling aluminum material is short fibre.
The aluminum matrix composite engine piston that the utility model provides compared with prior art, has the following advantages:
Aluminum matrix composite engine piston described in the utility model, with high strength support frame enhance mechanical strength, wear-resisting property is ensured with wear-resistant filling aluminum material, aluminium base quantity not sufficient is caused owing to all adopting high strength support frame then can increase the consumption of carbon fiber, be difficult to ensure the performances such as thermal conductivity, temperature tolerance and corrosion resistance, and only use a small amount of high strength support frame, and with not carbon fiber-containing strengthen simple aluminium base as filling aluminum material, be then difficult to meet the requirement of starting piston abrasion-proof to damage performance.
In addition, the preferably high strength support frame that the utility model provides comprises piston head and strengthens winding structure and piston skirt pin-and-hole enhancing winding structure:
It is when considering pistons work that piston head strengthens winding structure, the active force of piston head needs to be passed to connecting rod by piston skirt, the power of connecting rod also needs to be passed to piston head by piston skirt, therefore the connection between piston skirt and piston head is most important, piston skirt is extended to by its two ends of long carbon fiber making the surface being positioned at piston head be coated with silicon carbide, thus the power making piston head apply is distributed to whole piston skirt, the power that piston skirt is applied is distributed to whole piston head, and joint not only just between piston skirt and piston head is stressed.
It is consider that piston pin hole is for connecting connecting rod that piston skirt pin-and-hole strengthens winding structure, wear and tear comparatively serious and bear larger impact force, easy season cracking, therefore surface be coated with silicon carbide long carbon fiber around piston pin hole around a circle, piston pin hole wear-resisting property is significantly improved, and the power at the position that can make to be impacted can be dispersed to piston pin hole surrounding, the surperficial long carbon fiber being coated with silicon carbide oppositely extends around piston skirt at two ends after a circle around piston pin hole simultaneously, the power that piston pin hole is subject to is dispersed to piston skirt surrounding, by being wrapped in described piston skirt pin-and-hole enhancing winding structure outer described piston head enhancing winding structure, power is evenly passed to piston head again, piston head is to the power also in like manner back transfer of piston pin hole, with the short slab avoiding the link position making force localization between piston pin hole and piston head to cause mechanical strength.
Accompanying drawing explanation
Fig. 1 is the high strength support frame side structure schematic diagram (for ease of representing structure, the cambered surface in figure is the view after flattening) of a kind of aluminum matrix composite engine piston described in the utility model;
Fig. 2 is the high strength support frame top surface structure schematic diagram of a kind of aluminum matrix composite engine piston described in the utility model.
Embodiment
Below in conjunction with specific embodiments content of the present utility model is described.
As depicted in figs. 1 and 2, be a kind of aluminum matrix composite engine piston structure schematic diagram described in the utility model.A kind of aluminum matrix composite engine piston described in the utility model, comprising: high strength support frame and to be coated on described high strength support frame outer and for the wear-resistant filling aluminum material of filling molding; The long carbon fiber winding arrangement that described high strength support frame is coated with silicon carbide by surface forms, and described high strength support frame comprises piston head and strengthens winding structure 1 and piston skirt pin-and-hole enhancing winding structure 2; Strengthen in winding structure 1 at described piston head, its two ends of long carbon fiber that the surface being positioned at piston head 3 is coated with silicon carbide extend to piston skirt 4; Strengthen in winding structure 2 at described piston skirt pin-and-hole, the long carbon fiber that the surface being positioned at piston pin hole 5 place is coated with silicon carbide oppositely extends around piston skirt 4 at two ends after a circle around piston pin hole 5, and described piston head strengthens winding structure 1 is wrapped in described piston skirt pin-and-hole and strengthens outside winding structure 2; Described wear-resistant filling aluminum material is short fibre.
The preparation process of above-mentioned aluminum matrix composite engine piston comprises the following steps:
Step one, preparation surface are coated with the long carbon fiber of silicon carbide: put silk and wire drawing wheel traction by wire-feeding wheel, making long carbon fiber immerse silicon carbide mixes in suspension, then for subsequent use after cold drying, middle temperature is dried dehydration, high temperature dehydration densification successively; Particularly, step one detailed process parameter can with reference to the content recorded in Chinese patent literature CN 1059937 C.
Step 2, preparation surface are coated with the short carbon fiber of silicon carbide: prescinded by long carbon fiber, immerse silicon carbide and mix in suspension, ultrasonic vibration, then break up through cold drying successively, middle temperature is dried dehydration is broken up again, for subsequent use after high temperature dehydration densification, particularly, step 2 detailed process parameter can with reference to the content recorded in Chinese patent literature CN 1059937 C, with the content recorded in Chinese patent literature CN 1059937 C unlike, long carbon fiber first prescinds and then carries out immersion silicon carbide and mixes in suspension by the utility model, the proportion that area due to short carbon fiber section accounts for total surface area is larger, first surface treatment carried out to long carbon fiber and then prescind, then short carbon fiber section is due to uncoated silicon carbide separation layer, easily at high temperature produce interface reaction with molten aluminum liquid, thus affect the quality parameter of wear-resistant filling aluminum material, make the wear resistance decrease of aluminum matrix composite engine piston.Because short carbon fiber easily bonds mutually, therefore need ultrasonic guarantee short carbon fiber fully to contact silicon carbide when flooding and mix suspension, need repeatedly to break up in drying step, fully disperse in molten aluminum liquid so that follow-up.
Step 3, preparation high strength support frame: the long carbon fiber that the surface of step one being prepared is coated with silicon carbide is wound around the piston framework structure being arranged into and having top, skirt section and pin-and-hole, the long carbon fiber that surface is coated with silicon carbide first oppositely extends around piston skirt at two ends after a circle around piston pin hole, be wound piston skirt and piston pin hole, and then be wound around to piston skirt opposite side through piston head by side, piston skirt, its two ends of long carbon fiber making the surface being positioned at piston head be coated with silicon carbide all extend to piston skirt.Particularly, its two ends of long carbon fiber making the surface being positioned at piston head be coated with silicon carbide all extend to the winding of piston skirt can be as depicted in figs. 1 and 2, by piston head around to piston skirt, each circle is all the rectangle that joint interlocks, parallel around one deck again perpendicular to the direction of last layer, parallel around one deck again around to piston skirt by piston head, form similar cylindrical structure; Hollow part and inner fovea part can excise unnecessary carbon fiber, for preventing high strength support frame loose, first can be immersed in molten aluminum liquid by the high strength support frame wound, then taking out cooling afterwards, then excise unnecessary carbon fiber.
Step 4, wear-resistant filling aluminum material filling molding: the high strength support frame that step 3 is obtained is placed in casting moulds, then the short carbon fiber surface that step 2 obtains being coated with silicon carbide mixes with molten aluminum liquid after preheating, through ultrasonic fully mix after be poured in casting moulds, make piston cast molding, namely obtain finally by T6 heat treatment.Particularly, step 4 detailed process parameter can with reference to the content recorded in Chinese patent literature CN 101775563 B.
Above content is in conjunction with specific embodiments to the detailed description that the utility model is done, and can not assert that the utility model is specifically implemented to be only limitted to these explanations.For the utility model person of ordinary skill in the field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as the scope belonging to the utility model protection.
Claims (1)
1. an aluminum matrix composite engine piston, is characterized in that, comprising: high strength support frame and to be coated on described high strength support frame outer and for the wear-resistant filling aluminum material of filling molding;
The long carbon fiber winding arrangement that described high strength support frame is coated with silicon carbide by surface forms, and described high strength support frame comprises piston head and strengthens winding structure (1) and piston skirt pin-and-hole enhancing winding structure (2); Strengthen in winding structure (1) at described piston head, its two ends of long carbon fiber that the surface being positioned at piston head (3) is coated with silicon carbide extend to piston skirt (4); Strengthen in winding structure (2) at described piston skirt pin-and-hole, the long carbon fiber that the surface being positioned at piston pin hole (5) place is coated with silicon carbide oppositely extends around piston skirt (4) at two ends after a circle around piston pin hole (5), and described piston head strengthens winding structure (1) is wrapped in described piston skirt pin-and-hole and strengthens winding structure (2) outward;
Described wear-resistant filling aluminum material is short fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139008.6U CN204572227U (en) | 2015-03-12 | 2015-03-12 | A kind of aluminum matrix composite engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139008.6U CN204572227U (en) | 2015-03-12 | 2015-03-12 | A kind of aluminum matrix composite engine piston |
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| Publication Number | Publication Date |
|---|---|
| CN204572227U true CN204572227U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520139008.6U Expired - Fee Related CN204572227U (en) | 2015-03-12 | 2015-03-12 | A kind of aluminum matrix composite engine piston |
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| CN (1) | CN204572227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727970A (en) * | 2015-03-12 | 2015-06-24 | 安徽省恒泰动力科技有限公司 | Aluminum matrix composite engine piston and manufacturing process thereof |
-
2015
- 2015-03-12 CN CN201520139008.6U patent/CN204572227U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727970A (en) * | 2015-03-12 | 2015-06-24 | 安徽省恒泰动力科技有限公司 | Aluminum matrix composite engine piston and manufacturing process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160312 |