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针对目前ZL101A铝合金支架零件毛坯生产采用常规砂型铸造存在铸件致密度低,尺寸精度差和生产效率低的问题,采用金属型铸造工艺生产该支架。在模具结构设计方面主要考虑铸件的取出、浇道和冒口的设置、型芯的固定和取出以及模具的锁紧等多方面要求。结果表明:由于金属型冷却速度较快和铸造条件比较稳定,所得支架铸件组织较致密并具有较好的尺寸精度和表面粗糙度,生产效率也有很大提高。
Aiming at the problem of low solid density, poor dimensional accuracy and low production efficiency, conventional castings of ZL101A aluminum alloy support parts blank are produced by metal casting process. In the mold structure design mainly consider the casting, sprue and riser settings, the core of the fixed and removed as well as the mold locking and other requirements. The results show that, due to the rapid cooling rate of the metal type and the relatively stable casting conditions, the castings of the scaffolding obtained are denser and have better dimensional accuracy and surface roughness, and the production efficiency is also greatly improved.