A milling cutter is a rotary tool used in milling operations. Machining centers in the work, through the teeth of the cutter sequentially intermittent cut away the workpiece margin to complete the cutting process. Milling cutter is mainly used for milling machine processing plane, step, groove, molding surface and cut off the workpiece. So what kind of milling cutter is suitable for CNC machining center to use?

Suitable for CNC machining centers to use milling cutter material

If the milling cutter is used on CNC machining centers, then it should be an integral carbide. For general milling machines, you can use white steel. These two materials need to be considered separately. White steel milling cutter and carbide milling cutter compared to the soft hardness. High-speed steel cutter is cheap, good toughness, but the strength is not high, easy to let the knife, and wear resistance, thermal hardness is relatively poor, high-speed steel milling cutter thermal hardness of 600 degrees or so, hardness of 65HRC or so, it is clear that when milling harder materials with white steel, if the coolant is not in place, then it is easy to burn the knife which is one of the reasons for the thermal hardness is not high.

Carbide milling cutter thermal hardness is good, wear-resistant, but poor impact resistance, casually drop the blade will be broken, carbide is made of powder metallurgy method of materials, hardness up to 90HRA or so, thermal sex up to 900-1000 degrees or so. So white steel is suitable for general milling machine, alloy milling cutter when the CNC machining center.

Selection of milling cutter specifications

Machining center milling cutter diameter should be selected depending on the product and production batch of different differences, the selection of tool diameter depends mainly on the specifications of the equipment and workpiece processing size.

Selection of milling cutter inserts

Machining center precision milling ** use ground inserts. This kind of insert has better dimensional accuracy, so the cutting edge in the milling of the positioning accuracy is higher, you can get better machining accuracy and surface roughness. In addition, the grinding milling inserts used in finishing the development trend is to grind out the chip roll groove, forming a large positive rake angle cutting edge, allowing the insert to cut on small feed, small depth of cut. Carbide inserts without a sharp rake angle, when the use of small feed, small depth of cut machining, the tip of the cutter will rub the workpiece, short tool life.

Some machining occasions choose pressed inserts is more appropriate, sometimes also need to choose the grinding of the insert. Roughing ** choice of pressed inserts, which can make the processing cost down. The dimensional accuracy and sharpness of the edge of the pressed inserts is worse than the ground inserts, but the edge strength of the pressed inserts is better, roughing impact resistance and can withstand a larger depth of cut and the amount of feed. Pressed inserts sometimes have a chip roll groove on the front face, which can reduce the cutting force, but also reduce the friction with the workpiece and chips, reducing power requirements.

Nowadays, with newer and more skillful technology, the products produced are more efficient. The milling cutter as the direct executor of the CNC operation, the understanding of the milling cutter is the key to efficient production of CNC machining centers.