The characteristics of deep hole machining hole reaming

(1) Leave a small and stable margin for the bottom hole. The bottom hole cannot be drilled at one time with a drill, and the size of one drilling is unstable. You should drill with a smaller drill first, and then use a suitable drill to ream the hole. The bottom hole allowance is between 0.05 and 0.1 mm. The roughness should not be too bad, and should reach Ra6.3μm.

(2) The cutting edge of the reamer must be ground, with a roughness of Ra0.4μm or less, and the transition arc between the guide edge and the cutting edge should be ground to avoid straining the parts when the tool is retracted.

(3) The cutting speed during reaming is less than 20mm/min, and the feed speed should be 0.2mm/r.

(4) Adding saponification liquid when reaming helps to improve the surface roughness.