1. The surface of deep hole drilling with internal chip removal is not smooth: reduce the cutting amount, prevent the cutting edge from collapsing, use the cutting fluid with high extreme pressure characteristics, improve the filter condition, improve the working pressure and total flow of the cutting fluid, adjust the parallelism between the lathe spindle and the drill sleeve, adopt the suitable drill sleeve diameter, and adopt the suitable cutting amount;
2. Internal chip removal deep hole drill twist drill fracture: change the specification of chip breaking groove to prevent too long, clear away tube plate deep hole drill, too shallow, deal with the condition of broken edge in time and replace it, increase the working pressure and total flow of cutting fluid, customize tube plate deep hole drill, use the steel parts with symmetrical raw material mechanism, use the appropriate cutting amount, dismantle and replace the twist drill in time to prevent damage, and use the appropriate cutting Liquid and improve the filter condition.