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依据自行车前叉铝合金压铸件的结构特点设计两种方案的浇注排溢系统。基于有限差分方法的铸造分析软件ADSTEFAN,对两种方案温度布和凝固过程进行模拟分析,并对铝合金自行车前叉件模具结构进行了设计和优化。模拟表明,长U型类压铸件的浇口位置设计在模具中间部位,既可使模具结构紧凑,又可保证模具的热平衡;采用对称结构梳状内浇口的同时要考虑内浇口分布位置及疏密,将直接影响充填及凝固过程中材料的质量、能量的均衡性。综合以上因素建立了该压铸件优化模具并试制了一批铸件,所获铸件质量良好,与模拟结果吻合。
According to the structural characteristics of aluminum forklift alloy forklift design of two programs pouring overflow system. The casting analysis software ADSTEFAN based on the finite difference method is used to simulate the temperature distribution and solidification process of the two schemes. The mold structure of aluminum alloy bicycle front fork is designed and optimized. Simulation shows that the long U-type die-casting gate position design in the middle part of the mold, the mold can make the structure is compact, but also to ensure the thermal balance of the mold; the use of symmetrical structure comb-shaped gate at the same time to consider the gate location And density, will directly affect the filling and solidification of the material quality, energy balance. Based on the above factors, the die-casting mold was optimized and a batch of castings were trial-produced. The obtained castings were of good quality and coincided with the simulation results.