What Is The Milling And Reverse Milling Of CNC Milling Machine?

First, CNC milling machine milling and reverse milling is what

The direction of rotation of the contact between the milling cutter and the workpiece is the same as that of the workpiece feed direction, and vice versa. There are always large or small gaps between the nuts and the leadscrews of the milling machine. With the change of the horizontal milling force during the milling, the table and the lead screw will move around. This periodic movement makes the work Taiwan movement is very smooth, easy to cause damage to the knife but the vertical milling of the milling force to the workpiece pressure to the table, the tooth and the machined surface sliding, friction is small, to reduce the tooth wear, reduce the work hardening phenomenon and Reduce the surface roughness are beneficial. Therefore, when the table screw and nut clearance to adjust to less than 0.03mm or milling thin and long workpiece should be used when the milling. Reverse milling when the vertical component of the workpiece will be raised, the teeth and the machined surface sliding to increase the friction. But the horizontal component of the milling force to help the screw and nut close, so that the table movement is relatively smooth, milling, forgings caused by tooth wear is also smaller. So the general use of reverse milling milling.

Second, CNC milling machine milling and reverse milling characteristics


When the milling is done, the cutting thickness of each knife is changed from small to large. When the cutter teeth just contact with the workpiece, the cutting thickness is zero, only when the knife teeth in the former knife teeth on the cutting surface of the slide over a distance, cutting thickness reaches a certain value, the tooth was really started cutting. The reverse milling makes the cutting thickness gradually change from large to small, and the sliding distance of the tooth on the cutting surface is also small. And when the milling, the knife teeth on the workpiece through the distance than the reverse milling short. Therefore, in the same cutting conditions, the use of reverse milling, the tool easy to wear. When the milling is done, the teeth are cut from the surface of the workpiece each time, so it is not appropriate to process the hardened workpieces. The average cutting thickness when milling is small, the cutting deformation is small, and the power consumption is less than that of the reverse milling.

Features of reverse milling:

, The direction of the horizontal cutting force acting on the workpiece due to the milling cutter is opposite to that of the workpiece feed, so that the table screw and the nut can always be tightly fitted to one side of the thread. And the direction of the milling is not the same, because the direction of the horizontal milling force and the workpiece feed the same direction, when the knife teeth on the workpiece when the force is large, due to the gap between the table and the gap between the nut, the table will produce channeling So that not only destroyed the smoothness of the cutting process, affecting the quality of the workpiece processing, and serious damage to the tool. As the friction between the teeth and the workpiece is large, so the cold surface of the machined surface is more serious.

Summary: milling and reverse milling have their own advantages and determine the specific use of which milling method or according to the workpiece is required to be what is required, the surface smoothness of the use of high-speed milling, and vice versa using reverse milling.