ANALYSIS OF COOLING RATE IN THE LOW PRESSURE DIE CASTING OF A356 ALUMINUM ALLOY WHEEL

• Main Authors: Yen-Feng Lu, 呂彥鋒
• Other Authors: Ay Su
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/59420599740615192429

碩士 === 元智大學 === 機械工程學系 === 102 === A procedure is Low pressure die casting is currently the major process used to produce aluminum alloy wheelsAluminum disc wheels intended for normal use on passenger cars are commonly produced by. If the air-pipe waiting time and Cooling Time of mold are not well controlled, shrinkage cavity will occur after solidification, which might cause leakage problems to the disc wheel. This thesis simulated the casting process by MAGMAsoftcomputer simulation, and a Shrinkage Index (SI) is defined using the phenomenon of liquid entrapped. This thesis then discussed the shrinkage cavity influence of ribs middle sectionand final section temperature difference difference of air-pipe waiting time and air-pipe waiting and cooling Timeprocess, , and geometry of the wheel on SI after the mold temperature has converged. The relationship between SI and the percentage of wheels that have leakage in real test was discussed. We can use the simulation process and SI to predict the quality of the casting wheel .and Finally,the Taguchi is used to find optimal processing and the data presented in this report have been used to find the optimal process parameters. and reduce the failure rate, the time can achieve the best product stable effect