我矿01—38型凿岩机用的钻杆接头,过去是用型材厚皮钢管经车削加工制造的。后来,因厚皮钢管的来源不足,对生产有一定的影响。在领导的大力支持下,经反复实践,用失蜡法精密铸造,达到不切屑一次铸成生产急需 My mine 01-38 drill pipe joints used in the rock drill, the past is the use of thick-skinned steel profile section manufactured by turning. Later, due to lack of sources of thick-skinned steel pipe, the production has a certain impact. Under the leadership of the strong support, after repeated practice, with the lost wax method of precision casting, to achieve a chip-free cast once the production needs