1: Spindle speed = 1000Vc/πD

2: The maximum cutting speed (Vc) of general tools: high-speed steel 50 m/min; super-hard tools 150 m/min; coated tools 250 m/min; ceramic and diamond tools 1000 m/min 3 When machining alloy steel with Brinell hardness = 275-325, high-speed steel tools Vc = 18m/min; carbide tools Vc = 70m/min (cutting depth = 3mm; feed rate f = 0.3mm/r)

There are two calculation methods for spindle speed, as follows: ① Spindle speed: One is G97 S1000, which means that the spindle rotates 1000 revolutions per minute, which is commonly known as constant speed. Another is G96 S80, which is constant linear speed, which is determined by the surface of the workpiece.

There are also two types of feed speed. G94 F100 means that the tool travels 100 mm per minute. Another is G95 F0.1, which means that the tool feeds 0.1 mm per revolution of the spindle. Tool selection and cutting amount determination in CNC machining

The selection of tools and the determination of cutting amount are important contents in CNC machining technology, which not only affect the machining efficiency of CNC machine tools, but also directly affect the machining quality. QT Tools has many kinds of cutting tools for your choice.The development of CAD/CAM technology makes it possible to directly use CAD design data in CNC machining, especially the connection between microcomputers and CNC machine tools, which makes the entire process of design, process planning and programming completed on the computer, and generally does not need to output special process files.