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我厂过去加工直径为40毫米、长1100毫米的车床主轴深孔时,系利用枪管钻。因为没有专用钻床,就用车床代替。但由于枪管钻头的制造不合要求,故经常损坏,而且折断在主轴中,很难取出;同时也容易钻偏。在技术人员和老工人的密切合作下,并参考了国外资料,设计出如附图所示的深孔钻。钻柄内的小圆孔是高压油孔,以便于刃口的冶却。切屑可沿槽沟顺利地排出。最初系用高速钢镶片。这时加工主轴孔的工时由12
I plant the past processing diameter of 40 mm, 1100 mm long lathe spindle deep hole, the Department of the use of barrel drilling. Because there is no dedicated drilling machine, use the lathe instead. However, due to improper manufacture of barrel drill bit, it is often damaged, and broken in the spindle, it is difficult to remove; but also easy to bias. In close cooperation with technical staff and veteran workers, and with reference to foreign information, deep hole drills are designed as shown in the attached drawings. Small hole inside the drill handle is a high pressure oil hole, in order to facilitate the edge of the metallurgical. Chip can be smoothly discharged along the groove. Originally used high-speed steel veneer. At this time the working hours of the spindle hole by 12