Milling method of gantry machining center

The milling of the gantry machining center is mostly done by up-cut milling. However, climb milling should be used as much as possible, which will obtain better processing performance. When the gantry machining center is up-milling, there is a fierce conflict before the blade cuts, resulting in hardening of the machined surface, making it difficult for the next tooth to cut.

When the gantry milling machine is down milling, the milling width should be approximately equal to 2/3 of the diameter of the milling cutter, which ensures that the cutting edge can immediately cut into the workpiece as soon as it starts, and there is almost no conflict. If it is less than 1/2 the diameter of the milling cutter, the insert begins to "collide" with the workpiece again. Since the cutting thickness becomes smaller when cutting in, the feed per tooth will also decrease due to the narrowing of the radial cutting width. The result of the "conflict" is that the tool life is shortened. For carbide tools, it is more beneficial to increase the feed per tooth and reduce the depth of cut.

Therefore, during rough milling, if the radial cutting width is smaller than the radius of the milling cutter, the tool life will be increased and the processing time of the gantry milling machine will be shortened by increasing the amount of cutting. Of course, fine milling requires a smooth surface of the workpiece, so the number of passes should be limited.

Debugging this radial milling width and confirming the ratio of the cutter diameter to the radial milling width is best done on a high-precision gantry machining center, so as to observe the change in the surface roughness of the workpiece while adjusting the ratio.