Numerical Control gantry machining centers typically use down-cutting for milling operations. However, it is advisable to opt for up-cutting as it yields superior machining benefits. This is because during down-cutting with a gantry machining center, there is a severe clash before the blade cuts in, leading to surface hardening, making it difficult for the next tooth to engage.
When operating龙门mill machines in the up-cutting mode, the milling width should be approximately equal to 2/3 of the milling cutter's diameter. This ensures that the cutting edge can immediately engage the workpiece without conflict. If it is less than 1/2 of the cutter's diameter, the blade will initially "conflict" with the workpiece, as the cutting thickness decreases upon engagement. The "conflict" results in a shorter tool life. For carbide tools, increasing the feed per tooth and reducing the cutting depth is more beneficial.
So, during roughing operations, if the radial cutting width is less than the milling cutter's radius, increasing the feed rate will improve the tool life, thereby shortening the machining time on the gantry milling machine. Of course, for fine finishing, the workpiece surface needs to be smooth, so the feed rate should be limited.
Adjust this radial milling width, confirm the operation of the ratio between the milling cutter diameter and radial milling width, and perform it on a high-precision gantry machining center. This allows for observation of the surface roughness changes of the workpiece while adjusting the ratio.
