CN111318652A - Steering knuckle shell casting process for special vehicle - Google Patents
Steering knuckle shell casting process for special vehicle Download PDFInfo
- Publication number
- CN111318652A CN111318652A CN202010153858.7A CN202010153858A CN111318652A CN 111318652 A CN111318652 A CN 111318652A CN 202010153858 A CN202010153858 A CN 202010153858A CN 111318652 A CN111318652 A CN 111318652A
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- heat
- casting
- pouring
- cavity
- steering knuckle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention belongs to the technical field of automobile steering knuckles, in particular to a steering knuckle shell casting process for a special vehicle, which aims at the problem that the casting process of the steering knuckle shell in the prior art is difficult to produce high-quality products and comprises the following steps: spraying: spraying heat-conducting paint on the inner wall of the mold cavity, and then spraying lubricating paint; hot die: heating the mould and controlling the temperature of the mould cavity to be between 380 and 450 ℃; smelting: smelting the alloy into a molten state, fully and uniformly mixing, and then preserving heat; transferring: transferring the alloy melt in the heat-preservation molten state into a casting ladle. According to the invention, the heat-conducting coating and the lubricating coating are sprayed in the die cavity of the die, so that the heat-conducting effect of the die is improved, the temperature of the alloy melt in the die cavity is uniformly distributed, and the alloy melt is uniformly distributed in the die cavity by matching with the lubricating effect of the inner wall of the die cavity, thereby improving the density of a finished product.
Description
Technical Field
The invention relates to the technical field of automobile steering knuckles, in particular to a steering knuckle shell casting process for a special vehicle.
Background
The steering knuckle is one of important parts in an automobile steering axle, and can enable an automobile to stably run and sensitively transmit the running direction. The steering knuckle shell is arranged on the outer side of the steering knuckle and used for controlling the steering knuckle to realize direction control of the whole automobile. The middle through hole of the automobile steering knuckle is used for being installed together with a wheel shaft of an automobile, the upper end and the lower end of the steering knuckle shell are connected with the steering knuckle through bolts, and then the bolt shaft is locked through bolts to achieve connection.
Heavy load special vehicles and military off-road special vehicles are required to have the characteristics of adapting to severe road environments and field driving, the matching requirement on the whole vehicle is high, and particularly the axle housing assembly is required to have high strength and rigidity so as to ensure the bearing performance and the impact performance of an automobile chassis. The steering knuckle shell is a thin-wall part, the appearance is complex, no machining reference exists, and the machining precision requirement is high, so that the quality of a finished product of the steering knuckle shell is difficult to meet the use requirement, the automobile is easy to break down during running and working, and especially special vehicles needing to bear high-strength operation have higher requirements on the stability and the reliability of the steering knuckle shell.
The steering knuckle shell and other parts with complex structures are generally produced by adopting a casting method, and are more efficient compared with other manufacturing methods. However, because the wall thickness of the steering knuckle is small, the strength and rigidity of the produced product cannot meet the use requirements easily, and the casting process at the present stage cannot produce high-quality thin-wall parts easily, so that a new casting process needs to be provided.
Disclosure of Invention
The invention aims to solve the problem that a high-quality product is difficult to produce by a steering knuckle shell casting process in the prior art, and provides the steering knuckle shell casting process for a special vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
a knuckle shell casting process for a special vehicle comprises the following steps:
1) spraying: spraying heat-conducting paint on the inner wall of the mold cavity, and then spraying lubricating paint;
2) hot die: heating the mould and controlling the temperature of the mould cavity to be between 380 and 450 ℃;
3) smelting: smelting the alloy into a molten state, fully and uniformly mixing, and then carrying out heat preservation at the temperature of between 700 ℃ and 800 ℃;
4) transferring: transferring the alloy melt in a heat-preservation molten state into a casting ladle, and simultaneously moving a flow inverter and a casting device to be right above a mold;
5) pouring: pouring the alloy melt into the die cavity by using an automatic pouring machine, and preserving heat for 1-2 hours;
6) opening the mold and removing sand: demolding by using an automatic demolding mechanism, and performing sand rolling and shot blasting treatment on the casting by using a sand rolling machine;
7) polishing and deburring: and removing the sprue and the feeding head by using a special clamp, and manually polishing to remove the flash and the bonded sand in the cavity.
Preferably, the heat-conducting coating comprises the following components in percentage by weight: 8-12% of silicon dioxide, 12-20% of titanium dioxide, 8-12% of zirconium silicate, 4-6% of boron nitride, 10-15% of aluminum oxide and the balance epoxy organic silicon resin; the lubricating coating comprises the following components in percentage by weight: 2-5% of sepiolite, 1-3% of diatomite, 15-22% of aluminum hydroxide, 6-10% of graphite, 2-5% of zinc oxide, 4-6% of talcum powder, 8-10% of lead oxide and the balance epoxy organic silicon resin.
Preferably, the casting height is 400-500mm and the casting speed is 0.8-1.2 m/s.
Preferably, the treatment time of the shot blasting treatment is 8-12 min.
Compared with the prior art, the invention has the advantages that:
1. the heat-conducting coating and the lubricating coating are sprayed in the cavity of the die, so that the heat-conducting effect of the die is improved, the temperature of the alloy melt in the cavity is uniformly distributed, and the alloy melt is uniformly distributed in the cavity by matching with the lubricating effect of the inner wall of the cavity, so that the density of a finished product is improved;
2. the stable heat preservation operation is carried out on the die before and after the pouring process, so that the alloy solution can be uniformly distributed in the die cavity after the pouring is finished, and the liquidity of the molten liquid is improved by adopting the proper pouring height and the pouring speed.
Detailed Description
In order that the invention may be more fully understood, there now follows a more detailed description of the invention, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example one
A knuckle shell casting process for a special vehicle comprises the following steps:
1) spraying: spraying a heat-conducting coating on the inner wall of a mold cavity, and then spraying a lubricating coating, wherein the heat-conducting coating comprises the following components in percentage by weight: 8-12% of silicon dioxide, 12-20% of titanium dioxide, 8-12% of zirconium silicate, 4-6% of boron nitride, 10-15% of aluminum oxide and the balance epoxy organic silicon resin; the lubricating coating comprises the following components in percentage by weight: 2-5% of sepiolite, 1-3% of diatomite, 15-22% of aluminum hydroxide, 6-10% of graphite, 2-5% of zinc oxide, 4-6% of talcum powder, 8-10% of lead oxide and the balance epoxy organic silicon resin;
2) hot die: heating the mould and controlling the temperature of the mould cavity to be between 380 and 450 ℃;
3) smelting: smelting the alloy into a molten state, fully and uniformly mixing, and then carrying out heat preservation at the temperature of between 700 ℃ and 800 ℃;
4) transferring: transferring the alloy melt in a heat-preservation molten state into a casting ladle, and simultaneously moving a flow inverter and a casting device to be right above a mold;
5) pouring: pouring the alloy melt into the die cavity by using an automatic pouring machine, and preserving heat for 1-2 hours, wherein the pouring height during pouring is 400mm, and the pouring speed is 0.8 m/s;
6) opening the mold and removing sand: demolding by using an automatic demolding mechanism, and performing sand rolling and shot blasting treatment on the casting by using a sand rolling machine, wherein the treatment time of the shot blasting treatment is 8 min;
7) polishing and deburring: and removing the sprue and the feeding head by using a special clamp, and manually polishing to remove the flash and the bonded sand in the cavity.
And then, conveying the finished steering knuckle shell to a laboratory for detecting various attributes to obtain that the yield of the steering knuckle shells produced in the batch is 93.8%.
Example two
A knuckle shell casting process for a special vehicle comprises the following steps:
1) spraying: spraying a heat-conducting coating on the inner wall of a mold cavity, and then spraying a lubricating coating, wherein the heat-conducting coating comprises the following components in percentage by weight: 8-12% of silicon dioxide, 12-20% of titanium dioxide, 8-12% of zirconium silicate, 4-6% of boron nitride, 10-15% of aluminum oxide and the balance epoxy organic silicon resin; the lubricating coating comprises the following components in percentage by weight: 2-5% of sepiolite, 1-3% of diatomite, 15-22% of aluminum hydroxide, 6-10% of graphite, 2-5% of zinc oxide, 4-6% of talcum powder, 8-10% of lead oxide and the balance epoxy organic silicon resin;
2) hot die: heating the mould and controlling the temperature of the mould cavity to be between 380 and 450 ℃;
3) smelting: smelting the alloy into a molten state, fully and uniformly mixing, and then carrying out heat preservation at the temperature of between 700 ℃ and 800 ℃;
4) transferring: transferring the alloy melt in a heat-preservation molten state into a casting ladle, and simultaneously moving a flow inverter and a casting device to be right above a mold;
5) pouring: pouring the alloy melt into the die cavity by using an automatic pouring machine, and preserving heat for 1-2 hours, wherein the pouring height during pouring is 500mm, and the pouring speed is 1.2 m/s;
6) opening the mold and removing sand: demolding by using an automatic demolding mechanism, and performing sand rolling and shot blasting treatment on the casting by using a sand rolling machine, wherein the treatment time of the shot blasting treatment is 12 min;
7) polishing and deburring: and removing the sprue and the feeding head by using a special clamp, and manually polishing to remove the flash and the bonded sand in the cavity.
And then, the finished steering knuckle shell is sent to a laboratory for detection of various attributes, and the yield of the steering knuckle shell produced in the batch is 94.5%.
EXAMPLE III
A knuckle shell casting process for a special vehicle comprises the following steps:
1) spraying: spraying a heat-conducting coating on the inner wall of a mold cavity, and then spraying a lubricating coating, wherein the heat-conducting coating comprises the following components in percentage by weight: 8-12% of silicon dioxide, 12-20% of titanium dioxide, 8-12% of zirconium silicate, 4-6% of boron nitride, 10-15% of aluminum oxide and the balance epoxy organic silicon resin; the lubricating coating comprises the following components in percentage by weight: 2-5% of sepiolite, 1-3% of diatomite, 15-22% of aluminum hydroxide, 6-10% of graphite, 2-5% of zinc oxide, 4-6% of talcum powder, 8-10% of lead oxide and the balance epoxy organic silicon resin;
2) hot die: heating the mould and controlling the temperature of the mould cavity to be between 380 and 450 ℃;
3) smelting: smelting the alloy into a molten state, fully and uniformly mixing, and then carrying out heat preservation at the temperature of between 700 ℃ and 800 ℃;
4) transferring: transferring the alloy melt in a heat-preservation molten state into a casting ladle, and simultaneously moving a flow inverter and a casting device to be right above a mold;
5) pouring: pouring the alloy melt into the die cavity by using an automatic pouring machine, and preserving heat for 1-2 hours, wherein the pouring height during pouring is 450mm, and the pouring speed is 1.0 m/s;
6) opening the mold and removing sand: demolding by using an automatic demolding mechanism, and performing sand rolling and shot blasting treatment on the casting by using a sand rolling machine, wherein the treatment time of the shot blasting treatment is 10 min;
7) polishing and deburring: and removing the sprue and the feeding head by using a special clamp, and manually polishing to remove the flash and the bonded sand in the cavity.
And then, the finished steering knuckle shell is sent to a laboratory for detection of various attributes, and the yield of the steering knuckle shell produced in the batch is 96.6%.
The present invention is not limited to the techniques described in the above embodiments, the above description is illustrative, and not restrictive, the right of the present invention is defined by the claims, and the technical matters related to the present invention based on the methods of change, recombination, etc. that those skilled in the art can obtain according to the present invention will be within the protection scope of the present invention.
Claims (4)
1. A steering knuckle shell casting process for a special vehicle is characterized by comprising the following steps of:
1) spraying: spraying heat-conducting paint on the inner wall of the mold cavity, and then spraying lubricating paint;
2) hot die: heating the mould and controlling the temperature of the mould cavity to be between 380 and 450 ℃;
3) smelting: smelting the alloy into a molten state, fully and uniformly mixing, and then carrying out heat preservation at the temperature of between 700 ℃ and 800 ℃;
4) transferring: transferring the alloy melt in a heat-preservation molten state into a casting ladle, and simultaneously moving a flow inverter and a casting device to be right above a mold;
5) pouring: pouring the alloy melt into the die cavity by using an automatic pouring machine, and preserving heat for 1-2 hours;
6) opening the mold and removing sand: demolding by using an automatic demolding mechanism, and performing sand rolling and shot blasting treatment on the casting by using a sand rolling machine;
7) polishing and deburring: and removing the sprue and the feeding head by using a special clamp, and manually polishing to remove the flash and the bonded sand in the cavity.
2. The process for casting the steering knuckle shell for the special vehicle as claimed in claim 1, wherein the heat-conducting coating comprises the following components in percentage by weight: 8-12% of silicon dioxide, 12-20% of titanium dioxide, 8-12% of zirconium silicate, 4-6% of boron nitride, 10-15% of aluminum oxide and the balance epoxy organic silicon resin; the lubricating coating comprises the following components in percentage by weight: 2-5% of sepiolite, 1-3% of diatomite, 15-22% of aluminum hydroxide, 6-10% of graphite, 2-5% of zinc oxide, 4-6% of talcum powder, 8-10% of lead oxide and the balance epoxy organic silicon resin.
3. The process for casting the steering knuckle shell for the special vehicle as claimed in claim 1, wherein the pouring height during pouring is 400-500mm, and the pouring speed is 0.8-1.2 m/s.
4. The knuckle shell casting process for a special vehicle as claimed in claim 1, wherein the shot blasting treatment is carried out for 8-12 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153858.7A CN111318652A (en) | 2020-03-07 | 2020-03-07 | Steering knuckle shell casting process for special vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153858.7A CN111318652A (en) | 2020-03-07 | 2020-03-07 | Steering knuckle shell casting process for special vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN111318652A true CN111318652A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010153858.7A Pending CN111318652A (en) | 2020-03-07 | 2020-03-07 | Steering knuckle shell casting process for special vehicle |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821263A (en) * | 2016-04-01 | 2016-08-03 | 珠海嵘泰有色金属铸造有限公司 | Aluminum alloy automobile steering gear case and superspeed casting preparing method thereof |
| CN206356538U (en) * | 2016-12-22 | 2017-07-28 | 上海爱仕达汽车零部件有限公司 | A kind of aluminium alloy steering gear housing quiescent pouring mould |
| CN108246967A (en) * | 2017-12-28 | 2018-07-06 | 安徽东升精密铸钢件有限公司 | A kind of casting method of casting thin-wall part |
| CN108705040A (en) * | 2018-06-01 | 2018-10-26 | 程科 | A kind of technique of shell mould method production automobile steering device shell |
-
2020
- 2020-03-07 CN CN202010153858.7A patent/CN111318652A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821263A (en) * | 2016-04-01 | 2016-08-03 | 珠海嵘泰有色金属铸造有限公司 | Aluminum alloy automobile steering gear case and superspeed casting preparing method thereof |
| CN206356538U (en) * | 2016-12-22 | 2017-07-28 | 上海爱仕达汽车零部件有限公司 | A kind of aluminium alloy steering gear housing quiescent pouring mould |
| CN108246967A (en) * | 2017-12-28 | 2018-07-06 | 安徽东升精密铸钢件有限公司 | A kind of casting method of casting thin-wall part |
| CN108705040A (en) * | 2018-06-01 | 2018-10-26 | 程科 | A kind of technique of shell mould method production automobile steering device shell |
Non-Patent Citations (2)
| Title |
|---|
| 杜永红: "湿型生产球铁转向器壳毛坯缩孔的防治 ", 《铸造技术》 * |
| 王公平等: "微车转向节系列球铁铸件的壳型铸造 ", 《特种铸造及有色合金》 * |
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Application publication date: 20200623 |