【摘要】 研究工作是在剖析了一字形钎头的基础上,提出了充分利用岩石脆弱面破岩的理论,据此研究成功了YS₁型柱齿钎头。在结构上采用了三翼四齿的钻头体、弧槽形排粉沟槽,适用于硬、中硬、软岩的三种齿形。阐述了选择精铸中碳合金结构钢为钻头体材料、钎焊固齿焊料选择和工艺要点,以及与之相匹配的热处理工艺研究结果。对工业性试验数据进行了分析,阐明了这种钎头达到凿岩时快速、高效、寿命长、粉尘小的原因和效果。更多还原

【Abstract】 YS₁ drill bit is developed based on the theory of cutting rock weak planes and on investigations of chisel bits. The drill bit body has three wings four cylindrical tungsten carbide inserts and curved slots for removal of cuttings. It has three kinds of teeth suitable for hard, medium hard and soft rocks. The paper describes selection of material for the bit body which is a precision casting medium carbon structural alloy steel, of solder for embedding the inserts, the important points of brazing and heat treatment technology. The reasons and effectiveness of rapid drilling, high performance and long life of the drill bit are also described.更多还原