The invention relates to a method for transforming a
milling cutter into a grooving cutter. The method comprises the following steps that a cutter tip of the old
milling cutter is ground to be removed, and the length of the old
milling cutter is decreased to the preset length of the grooving cutter in a
grinding mode; an old milling cutter blade is ground to be removed, and a grooving cutter blade bar is obtained; a groove is formed in the obtained grooving cutter blade bar, and a grooving cutter blade is obtained; the grooving cutter blade bar is ground to form a
drill point, and the grooving cutter is obtained. According to the method for transforming the milling cutter into the grooving cutter, the waste milling cutter can be utilized again; meanwhile, the shape of the milling cutter is similar to that of the grooving cutter,
machining is easier, the problem that the old milling cutter only can be discarded after being invalid is solved, the grooving cutter
machining difficulty is lowered, and the steps are simpler; in the process of transforming the milling cutter into the grooving cutter, all the procedures can be completed through a
grinding machine. According to a UC grooving cutter, the
diameter of a cutter bar is smaller than that of a cutter head, therefore, a first
cutting wall located on the cutter bar can not make contact with the groove wall of a machined groove in the working process of the grooving cutter, then the
machining quality of the groove wall can be guaranteed, and the condition that the side wall quality is reduced due to the fact that the first
cutting wall makes contact with the groove wall is prevented.