Characteristics of CNC Milling Machine – Calculation Method of Surface Velocity of End Milling Cutter

2022.4.23

CNC milling is gradually active in the market and widely welcomed by people. This is an automatic processing equipment, which is developed on the basis of ordinary milling machine. CNC milling machine is controlled by computer digital signal, and their processing technology and structure are roughly the same. In this paper, we introduce the characteristics of CNC milling machine and the calculation method of surface velocity of end milling cutter.


Characteristics of CNC Milling Machine

The biggest CNC milling machine features are:

1. Parts processing has strong adaptability and flexibility, and can process parts with particularly complex contour shape or difficult to control size, such as mold parts, shell parts, etc.

2. It can process parts that cannot be processed by ordinary machine tools or are difficult to process, such as complex curve parts described by mathematical models and three-dimensional space curved surface parts;

3. It can process parts that need to be processed in multiple processes after one-time clamping and positioning.

4. The machining precision is high, and the machining quality is stable and reliable. The pulse equivalent of CNC device is generally 0.001mm, and the high-precision CNC system can reach 0.1 μ m. In addition, the errors of CNC operators are avoided.

5. High degree of production automation can reduce the labor intensity of operators. It is conducive to the automation of production management.

6. With high production efficiency, CNC milling machines generally do not need to use special process equipment such as special fixtures. When replacing workpieces, they only need to call the processing program, clamping tools and adjusting tool data stored in the CNC device, which greatly shortens the production cycle. Secondly, the CNC milling machine has the functions of milling machine, boring machine and drilling machine, which makes the process highly concentrated and greatly improves the production efficiency. In addition, the spindle speed and feed speed of CNC milling machine are stepless, so it is helpful to select the best cutting parameters.

 

Calculation Method of Surface Velocity of End Milling Cutter

So how to calculate the surface speed of end milling cutter in the machining process of CNC milling machine?

1. Determine the radius of the drill bit. You can do this in one of two ways. First, the diameter of the end mill used in the caliper can be measured, and then divided by 2 to get the radius. For example, 5 mm divided by two produces a radius of two and a half millimeters. Alternatively, wrap the tape around a little to get its circumference, and then divide the quantity by twice the PI (3.14). For example, if the circumference is 12.56 mm, the radius is 2 mm.

2. Determines the angular velocity of the end mill in Hertz. If you have the RPM of angular velocity, then divide it by 60 to get hertz. For example, 600 rpm is 10 Hz.