论文部分内容阅读
高速钢刀具,特别是高速钢麻花钻,正全速向不断提高生产效率目标发展。为了获得高质量的刀具,下列典型因素具有决定意义: a) 高速钢的冶金质量; b) 刀具的几何形状、制造精度和表面质量; c) 热处理质量,退火和淬回火的质量。不是通过简单的外冷却,而是要通过内冷却的方式才能保持刀具的寿命(保持淬回火后的硬度稳定不变)。机械工业中生产加工车间的钻孔工时占机械加工总工时的30%。在所有的机械加工工序中钻孔工序
High-speed steel cutting tools, especially high-speed steel twist drill, are moving toward the goal of continuously improving production efficiency. The following typical factors are decisive in order to obtain high quality tools: a) metallurgical quality of HSS; b) tool geometry, manufacturing precision and surface quality; c) quality of heat treatment, quality of annealing and quenching and tempering. Not through a simple external cooling, but through the internal cooling method to maintain the life of the tool (to keep the hardness after quenching and tempering stable). Drilling hours in the production and processing workshops in the machinery industry account for 30% of the total man-hours for machining. Drilling operations in all machining operations