The cutting process of mold processing should be divided into at least three processes: roughing, semi-finishing and finishing, and sometimes even super-finishing. The roughing process will be suitable for ball end mills, round insert mills and large nose arcs Radius end mills, round insert milling cutters and ball nose milling cutters will be semi-finishing, during the finishing process, will be applied to round edge milling cutters and ball nose milling cutters, and the residual milling process will be applied to round insert milling Knives, ball end mills and straight end mills, in each process, it is very important to leave as much evenly distributed allowance as possible for the next process.

It is very important to optimize the cutting process by choosing the groove shape, special tool size and cutting parameters, brand combination and suitable milling strategy, so, should it be down milling or up milling in mold machining? The answer is to use climb milling.

When the cutting edge is just cut, the chip thickness can reach a maximum value in forward milling, and it is the lowest in up milling. Generally speaking, the tool life in up milling is shorter than that in down milling because of the The heat is significantly higher than in down milling, and more heat is generated as the chip thickness increases from zero to the maximum value in up milling because the friction on the cutting edge is stronger than in milling, and the radial force is also significantly higher in up milling , adversely affect the spindle bearing.

In climb milling, the cutting edge is mainly subjected to compressive stress, which has a more favorable effect on carbide inserts or solid carbide cutters than the tensile forces generated in up milling. There are of course exceptions, when using solid carbide end mills for side milling, especially in hardened materials, back milling is preferred, making it easier to achieve straight walls with tighter tolerances and better 90 degree angles Spend. If there is any misalignment between the different axial feeds, the tool connection marks are also very small, mainly due to the direction of the cutting force, if a very sharp edge is used in the cut, the cutting force will "pull" the knife towards the material, which can Another example of reverse milling is milling with an old manual milling machine. The old milling machine has a large screw clearance. The reverse milling generates cutting force to eliminate the clearance and make the milling action more stable.