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秦川机床厂铸造车间主要生产机床铸件和机床液压铸件。在生产液压件各类阀体时,由于内在质量要求高,一直是采用干砂型浇注长料的工艺。清理后按铸件要求尺寸割锯成单件入库。由于割锯工作误差大,长度尺寸一般相差2～3毫米。有的甚至相差5～6毫米。这种方法生产阀体件不但费工、成本高,而且达不到机械加工专机对铸件尺寸精度的要求。从1975年开始,厂校合作,应用压边浇冒口工艺单件生产阀体铸件,改干型为湿型,取消了割锯工序,大大缩短了生产周期,在保证铸件内在质
Qinchuan Machine Tool Plant casting workshop mainly produces machine tools and machine tools hydraulic casting. In the production of various types of hydraulic valve body, due to the inherent high quality requirements, has been the use of dry sand casting long material process. After cleaning, according to the requirements of the size of the cut sawing into a single piece warehousing. As a result of the large error saw cutting, the length of the general difference between 2 to 3 mm. Some even differ by 5 ~ 6 mm. This method of producing valve body parts not only labor-intensive, high cost, but also less than the machining of special plane casting dimensional accuracy requirements. Since 1975, the factory and school cooperation, the application of a single-piece production process of the die-casting side of the riser to produce valve castings, to change the dry type for the wet type, eliminating the sawing process, greatly reducing the production cycle, to ensure that the internal quality of castings