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Motorcycle Accessories

Name: Motorcycle Accessories
Weight: 1.5-3kg
Material: A380
Process: Die-casting





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Motorcycle aluminum casting principle
Motorcycle casting principle motorcycle aluminum casting is an important part of the motorcycle, and its performance directly affects the safety of motorcycle driving and life. Therefore, in the manufacturing process must be on the aluminum casting casting process, mold design and processing and other aspects of strict control.
I. Melting and casting of aluminum alloy
1. Melting of aluminum alloy The melting points of alloy elements are different, so the alloy elements in the liquid state have different diffusion capabilities. Generally speaking, a1 class (al) elements are easy to volatilize from the liquid phase; b2 class (mg), c 3 class (si) is not easy to volatilize; d3 class and e4 class volatility is poor. Because of this difference in properties between these elements, the eutectic points formed by each of them are different. For example, magnesium and silicon eutectic point is 738 ° C ~ 756 ° C, and calcium and copper for 572 ° C ~ 588 ° C. It should also be noted that when the temperature exceeds a certain limit, (such as 1000 °F or more), some elements will evaporate or decompose into other compounds and precipitate out of the surface of the liquid metal.
2. Pouring process Defects such as porosity and shrinkage should be avoided during the pouring process. To this end, the following measures should be taken:
(1) to prevent the escape of gas 1 to improve the furnace atmosphere in the co content to reduce the generation of p 2o 5; 2 using high purity quartz sand as refractory raw materials; 3 using vacuum degassing; 4 the use of nitrogen protection, etc. (2) to reduce the flow of liquid 1 to improve the material temperature to reduce the tendency of fluidization and thermal cracking; 2 to increase the number of cavities to reduce the pressure loss; 3 to improve the location of the gate so that the cooling water can be taken away from the heat in a timely manner; 4 Use high-pressure water injection method to top the cold iron; 5 Block the exhaust valve with a baffle to prevent air from escaping 6 Strengthen the management of the risers 7 Reasonable arrangement of the risers (3) to prevent the liquid leakage 1 Choose a reasonable form of the mold structure in order to improve the sealing 2 selection of suitable materials 3 Reasonable arrangement of the dimensions of the various parts of the 4 set up the pressure relief groove or the vent hole in order to ensure that the leakage does not occur.
Second, the mold design and manufacture (a) the design of the mold frame according to the production needs to determine the type of mold base and drawings can begin to make the mold frame. Commonly used single-acting and split-type double-acting type of the two types. Among them, the whole type of single-action mold frame equipped with movable template and fixed template two kinds of institutions; Split double-action only movable template a kind of institutions. (B) the design of the working part of the design of the working part of the main considerations are as follows: 1 the shape of the working parts and the accuracy requirements. 2 the selection of the positioning reference. 3 the position of the block. 4 the number of the block. 5 the guiding mode. 6 lubrication.

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