As far as the process usage of cnc center 850 is concerned, metal cutting will definitely rank first. Metal cutting is the most used process technology in machining center operations. The mastery of metal cutting technology directly measures the level of machine operation of the machining center. The editor has sorted out the relevant skills and commonly used calculation formulas in metal cutting. I hope you can have a deeper understanding and understanding of metal cutting operations.
The main sources of cutting force are: turning the outer ring, milling plane, planing plane, drilling, and grinding the outer ring.
basic concept
1. Cutting speed vc: refers to the instantaneous speed of the cutting amount of the selected point on the cutting edge of the tool relative to the surface to be machined in the main movement side, in m/min. Cutting speed has the greatest impact on tool durability, and it is best to enable the tool to work at the best cutting speed with minimal relative wear.
2. Feed amount f: The relative displacement between the tool and the workpiece along the direction of the feed movement during each revolution or each stroke of the main movement (or unit time), in mm/s. The feed has little effect on the durability of the tool. Under the condition of ensuring the surface roughness of the machine, a larger feed can be selected, generally f=0.1～0.3 mm/r.
3. The amount of back cutting (cutting depth) ap: the vertical distance between the surface to be machined and the machined surface, in mm. The cutting depth has the least influence on the durability of the tool. Generally, a larger cutting depth can be selected, which can not only prevent the tool tip from cutting in the hardened layer, reduce tool wear, but also increase the working length of the tool edge, which is conducive to heat dissipation. Generally, αp= 1～5 mm.
Cutting speed calculation formula
vc=π×D×N/1000, where π is the circumference ratio; D is the diameter of the lathe workpiece and the diameter of the milling cutter; N is the speed;
If the machining movement is mainly rotating, the cutting speed is generally the maximum linear speed, and the calculation formula is vc=π×d×n/1000×60. Among them, d is the diameter of the workpiece or tool (mm), and n is the workpiece or tool Rotation speed (r/min).
