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我厂模具车间精密铸造工段承担K_(180)型煤炭漏斗车底开门传动部分用伞齿轮的熔模精密铸造生产任务,产品的批量大、要求高。由于受工段的生产条件、技术水平和原材料的影响,产品质量很不稳定,出现了起皮、变形、表面光洁度不高等质量缺陷。同炉废品率有时达50～80％。为了克服这个困难,我们进行了多种尝试,由于影响因素较多,没有取得好的效果。在采用正交试验法安排熔模铸造这一多影响因素的试验时,仅经过八次试验和一次再试验,就取得了良好的效果,使产品的合
I plant mold workshop precision casting section commitment K_ (180) -type coal hopper bottom drive part of the bevel gear investment casting production tasks, the product of large quantities, high requirements. Due to the production conditions of the section, the technical level and the impact of raw materials, the product quality is very unstable, there has been a peeling, deformation, surface finish is not high quality defects. With the furnace scrap rate sometimes up to 50 ~ 80%. In order to overcome this difficulty, we conducted various attempts. Due to many factors, we did not achieve good results. Orthogonal test method in the investment casting investment in this multi-factor test, only after eight tests and a re-test, we achieved good results, so that the product of