How to choose the amount of CNC machining turning?

The specific value of cutting parameters during CNC machining should be determined by simulation method according to the performance of the machine tool, related manuals and combined with actual experience. At the same time, the spindle speed, the amount of back cutting and the feed speed can be adapted to each other to form the best cutting amount. So how to choose the amount of turning in the actual application process? What are the principles?

(1) When roughing, first consider choosing a back-cutting amount ap as large as possible, and then choosing a larger feed amount f, and finally determining an appropriate cutting progress v. Increasing the back-cutting amount ap can reduce the number of passes, and increasing the feed amount f is beneficial to chip breaking. Therefore, selecting the rough turning amount according to the above principles is beneficial to improve production efficiency, reduce tool consumption, and reduce processing costs.

(2) When finishing turning, the machining accuracy and surface roughness are required to be high, and the machining allowance is not large and uniform, so choose a small (but not too small) back-cutting amount ap and feed amount f, and select cutting High-performance tool materials and reasonable geometric parameters to increase the cutting speed v as much as possible.

(3) When arranging the amount of rough and fine turning, attention should be paid to the range of allowable cutting amount given in the manual of the cnc machining center. For CNC lathes with AC frequency conversion speed regulation for the main shaft, since the torque of the main shaft is reduced at low speeds, special attention should be paid to the selection of cutting parameters at this time.