STEEL PIPE CUTTING MACHINE EQUIPPED WITH SAW BLADE USED FOR BOTH CUTTING AND CHAMFERING

摘要

PURPOSE:To improve the efficiency of cutting and chamfering a steel pipe by mounting a cut-off milling cutter and a chamfering milling cutter having a diameter less than that of said cut-off milling cutter on the same shaft. CONSTITUTION:Chamfering milling cutters 3 are fixed on the same main shaft 4 of a cut-off milling cutter 2 having a larger diameter than said cutter while holding the latter cutter therebetween. The cutters 2, 3 can be independently separated for re-polishing. Four-heads of a main spindle provided with said combined cutters are arranged equally spaced on the outer periphery of a steel pipe 1 to be cut. A relative motion of the cutter to the steel pipe 1 causes the cutting and chamfering to be completed by means of the turning cutters 2, 3 only with 1/4 rotation, i.e., 90 deg. rotation of the steel pipe 1 with respect to the fixed cutter.