Coated sand technology for casting tailer chassis
A technology of trailer chassis and coated sand, which is applied in the direction of manufacturing tools, casting molding equipment, tools, etc., can solve the problems of large wall thickness differences of castings, high labor costs, traffic accidents, etc., to solve cracks and lack of meat, save Welding work, the effect of reducing manufacturing costs
Inactive Publication Date: 2009-06-17
广东省韶铸集团有限公司
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Problems solved by technology
[0002] At present, the chassis of trailers manufactured in China are all made of stamping methods, and then the internal parts are spot welded. The labor cost is relatively high, and the shape is easily deformed during the welding process. Due to the vibration of the vehicle during driving, the spot welded parts are easy to crack, causing traffic accidents. Accident; when using sodium silicate sand and furan resin sand to cast trailer chassis, steel castings are prone to cracks
In addition, due to the large difference in wall thickness of this casting, the thick part is 42mm, most of the wall thickness is 7.6mm, the overall size of the casting is 978×748, and the weight of the blank is 115kg. The molten steel is not easy to fill, and it is easy to cause the chassis casting to lack meat.
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Embodiment Construction
[0008] Below in conjunction with embodiment the present invention is further described.
[0009] A coated sand process for casting a trailer chassis, including a sand mold. The coated sand process is used to cast the trailer chassis as a whole. The coated sand sand mold has an overall size of 1038mm x 863mm. The larger the coated sand mold size, the greater the chance of deformation. In order to reduce deformation, the following process conditions are adopted: the shell mold of the sand mold adopts the anti-deformation structure of tension bars, the distance between the ribs and plates is 200mm, the thickness of the shell mold is 12-16mm, the shell mold of the sand mold adopts a hot core box mold, and is manufactured by a core shooter. Pressure 3~5kg / cm 2 , Sand blowing time is 10-20s, hardening temperature is 200-250℃, hardening time is 4-6 minutes; ordinary cast steel coated sand is used, the particle size is 50-100 mesh, the tensile strength is greater than 1.5MPa, and the ...
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Abstract
The present invention relates to a film-covering sand process for casting trailer chassis. It is characterized by that it includes a sand mould, and adopts film-covering sand process to integrally cast the trailer chassis, the described sand mould shell adopts tie piece anti-deformation structure, the spacing distance between tie pieces is 200 mm, the thickness of sand mould shell is 12-16 mm, the grain size of said general film-covering sand is 50-100 meshes, its tesile strength is greater than 1.5 MPa and its gas evolution rate is less than 15 ml / g. Its pouring system adopts 9 open risers, and its casting time is 6-10s.
Description
【Technical field】 [0001] The invention relates to a casting technology, in particular to a coated sand process for integrally casting a trailer chassis. 【Background technique】 [0002] At present, the chassis of trailers manufactured in China are all made of stamping methods, and then the internal parts are spot welded. The labor cost is relatively high, and the shape is easily deformed during the welding process. Due to the vibration of the vehicle during driving, the spot welded parts are easy to crack, causing traffic accidents. Accidents: when using water glass sand and furan resin sand to cast trailer chassis, steel castings are prone to cracks. In addition, due to the large difference in wall thickness of the casting, the thickest part is 42mm, and most of the wall thickness is 7.6mm. The overall size of the casting is 978×748, and the blank weight is 115kg. The molten steel is not easy to fill, and it is easy to cause the chassis casting to lack meat. 【Content of in...
Claims
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IPC IPC(8): B22D25/02B22C23/00
Inventor 钟良伟东富义蓝福珍黄世来
Owner 广东省韶铸集团有限公司