METHOD FOR MANUFACTURING MOTOR CASE FOR FUEL INJECTION APPARATUS OF AUTOMOBILE

摘要

According to the present invention, a method to manufacture a motor case in the method to manufacture the motor case including a body unit with an open top and an open bottom, an end cover joining unit formed on a top of the body unit having an internal stepped portion and the open top, and a bottom opening unit which is an open part of the bottom of the body unit; comprising: a drawing step of processing a circular metal plate into a cup shape; a center piercing step of forming a hole on the center of the bottom of the cup shape; a burring step of flattening the parts around the hole to form the end cover joining unit; a piercing step of cutting a horizontal part among the parts flattened through the burring step; and a pipe-extending drawing step of extending an inner diameter of the parts flattened through the burring step. The purpose of the present invention is to provide the method to manufacture the motor case of a motor for a vehicle fuel injecting device capable of improving a quality of the motor case.