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我厂生产的连杆铜套,材料多采用БPOЦC-6-3、БPOЦC5-5-5和БPOЦ10-2等牌号的锡青铜,由于锡青铜的凝固范围较宽,所以铸件多产生气孔、缩松、针孔、砂眼等铸造缺陷,废品率平均在40％左右,严重影响产品质量和产量的提高。为了解决以上问题,我们在学习各厂经验的基础上,发挥了“奋发图强,自力更生”的精神,以三结合的方法,自行设计了一台“间易”的真空吸铸机。经过一年多来的生产证明,基本上解决了气孔、缩松、针孔和砂眼等铸造缺陷,使铸件质量大大提高,废品率显著下降。一、真空吸铸工艺的特点真空吸铸工艺是近年来有色金属铸造方法中的一项新技术。这种方法适用于锡青铜、磷
I plant the production of copper rods, materials and more use БPOЦC-6-3, БPOЦC5-5-5 and БPOЦ10-2 and other brands of tin bronze, tin bronze solidification of a wide range, so cast more porosity, shrinkage , Pinholes, trachoma casting defects, the average rejection rate of about 40%, seriously affecting product quality and yield improvement. In order to solve the above problems, on the basis of learning the experience of each factory, we have played a “work hard and self-reliant” spirit and designed a vacuum suction machine of “easy-to-use” by combining the three methods. After more than a year of production proved that basically solved the pores, shrinkage, pinhole and trachoma and other casting defects, greatly improving the quality of castings, the rejection rate dropped significantly. First, the characteristics of vacuum suction process Vacuum suction process is a non-ferrous metal casting method in recent years, a new technology. This method is suitable for tin bronze, phosphorus