Disclosed are a blank of an automotive front pillar inner plate part and a
machining method. The blank is integrally similar to the appearance of the front pillar inner plate part, the middle of the blank is straight, one end of the blank is wide, the other end of the blank is narrow, two ends of the blank are bent towards the same side, bent positions are in arc transition, the blank comprises two pieces distributed on an online blanking and
machining structure unit, and the two pieces of the blank are in
central symmetry. The
machining method includes the steps: using two
stamping dies with cavities in
central symmetry for online blanking on an uncoiling blanking line; uncoiling a steel plate coil, and leading the steel plate coil to correspond to one blanking and machining structure unit when conveying the steel plate coil by the length of a blanking unit; and using an online process for blanking once to manufacture the two pieces of the steel plate blank of the front pillar inner plate, wherein the two pieces are arrayed in
central symmetry. By the aid of the front pillar inner blank with the structure, material
utilization rate can be increased, and cost can be reduced. Besides, the step of single blanking for rectangular blanks in subsequent machining is omitted, manufacturing procedures can be simplified, cost can be saved, control links are decreased, and precision and quality of final parts are improved.