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我厂精密铸造车间承担着凿岩机械与气动工具类产品100多种精铸件的生产任务。为提高精铸件的质量,首先就要提高蜡型质量,因为蜡型质量是精铸件质量的基础。二年来我们采取了以下三方面措施,使蜡型工序的废品率由原来的20～30%稳定在5%以下。 1.修定调蜡工艺我厂使用的是石蜡-硬脂酸低温模料。蜡膏的质量(温度、干稀程度及均匀性)严重地影响着蜡型质量,而蜡液温度的高低、蜡液与蜡粉的配比及搅拌方法等是影响蜡膏质量的重要因素。我厂原调蜡工艺蜡液温度70～80℃;蜡液与蜡粉配比适量;搅拌时间约15分钟;静止
Our precision casting shop is responsible for the production of over 100 castings for rock drilling machinery and pneumatic tools. In order to improve the quality of castings, we must first improve the quality of the wax, because the quality of the wax is the basis for the quality of the castings. In the past two years, we have adopted the following three measures to keep the scrap rate of the wax process from 20 to 30%, which is stable below 5%. 1. Repair waxing process Our factory uses paraffin-stearic acid low-temperature molding material. The quality of wax (temperature, dryness and uniformity) seriously affects the quality of the wax type. The temperature of the wax liquid, the ratio of the wax liquid to the wax powder, and the stirring method are important factors affecting the quality of the wax paste. Our factory original waxing process wax liquid temperature 70 ~ 80 °C; wax liquid and wax powder ratio appropriate; stirring time of about 15 minutes; static