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Selection of Cemented Carbide Milling Cutter
Release time:
Nov 12,2021
Milling stainless steel in addition to end mills and some end mills and carbide for milling cutter materials, the rest of the various types of milling cutters are made of high-speed steel, especially tungsten-molybdenum and high vanadium high-speed steel has a good effect, the tool durability can be increased by 1-2 times than W18Cr4V. The carbide grades suitable for making stainless steel milling cutters are YG8, YW2, 813, 798, YS2T, YS30, YS25, etc.
Milling stainless steel in addition to end mills and some end mills and carbide for milling cutter materials, the rest of the various types of milling cutters are made of high-speed steel, especially tungsten-molybdenum and high vanadium high-speed steel has a good effect, the tool durability can be increased by 1-2 times than W18Cr4V. The carbide grades suitable for making stainless steel milling cutters are YG8, YW2, 813, 798, YS2T, YS30, YS25, etc.
The most significant effect of the spray cooling method, can improve the durability of the milling cutter more than twice; such as the general 10% emulsion cooling, should ensure that the cutting fluid flow to achieve full cooling. When milling stainless steel with hard alloy milling cutter, Vc = 70-150 m/min and Vf = 37.5-150 mm/min shall be taken, and appropriate adjustments shall be made according to different alloy grades and workpiece materials.
Stainless steel has strong adhesion and fusion, and the chips are easy to adhere to the cutting edge of the milling cutter, which deteriorates the cutting conditions. When reverse milling, the cutting edge slides on the hardened surface first, increasing the tendency of work hardening. When milling, the impact and vibration are large, which makes the milling cutter edge easy to collapse and wear.
When milling stainless steel, the cutting edge should be sharp and can withstand the impact, and the chip groove should be large. Large helix angle milling cutter (cylindrical milling cutter, end milling cutter) can be used, the helix angle B is increased from 20 to 45 (gn = 5), and the tool durability can be increased by more than 2 times, because the working rake angle g0e of the milling cutter is increased from 11 to 27, and the milling is light and fast. However, the value of B should not be large, especially for end mills with b≤ 35 °, so as not to weaken the teeth.
The use of wave edge milling cutter processing stainless steel pipe or thin-walled parts, cutting brisk, small vibration, chip fragile, workpiece deformation. High-speed milling with carbide end mills and milling of stainless steel with indexable end mills can achieve good results.
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