Technology of opening cross flutes with end mills

If there is no round groove on the front of the four-blade end mill, it is necessary to use the fillet of the grinding wheel to reopen the cross groove along the spiral groove direction of the milling cutter, with a depth of about 1 to 2 mm (too deep and easy to crack, too shallow and difficult to be ground. angle). When grooving, make sure that the side of the grinding wheel does not touch the other cutting edge below (Note: This cross groove has chip removal effect, if it is not opened, the inclination of the edge recessed in the middle should be increased).