Cutter and method for machining tubular component

A method for machining a tubular component using a cutter for machining a tubular component, the cutter comprising a cutter body, a first cutter portion and a second cutter portion being provided on a front end in a longitudinal direction of the cutter body, the first cutter portion extending along the longitudinal direction of the cutter body, and the second cutter portion being located on a rear side of the first cutter portion in the longitudinal direction and protruding from a main side surface of the cutter body in a direction substantially perpendicular to the main side surface, the method comprising:

• rotating a blank tube of the tubular component, driving the cutter for machining the tubular component so that the second cutter portion is inserted into a hole of the blank tube and the second cutting edge on the second cutter portion contacts an edge of an inner wall of the blank tube to machine an internal chamfer of the blank tube;
• and
• retreating the second cutter portion from the hole of the blank tube, and driving the cutter for machining the tubular component again to cause the first cutting edge of the first cutter portion to contact an outer wall of the blank tube to cut off the blank tube.