Method for manufacturing operation rod of wrench assembly for disassembling fan clutch, and product and wrench assembly thereof

A method for manufacturing an operation rod of a wrench assembly for disassembling a fan clutch, including following steps of:

• preparing a rod material, the rod material including a rod body and a head portion which is connected to the rod body;
• fixing the rod material on a forging mold;
• carrying out a forging process, making the forging mold impact and press the head portion along a processing direction to produce a semi-finished head, the semi-finished head including two semi-finished structures and a remainder structure which is connected to the two semi-finished structures, the remainder structure extending in a flat shape, the two semi-finished structures being connected to two opposite side faces of the remainder structure on the processing direction, each said semi-finished structure including two ear portions and a semi-cylinder, the two ear portions being arranged spacingly on a direction lateral to the processing direction, the semi-cylinder being connected to the two ear portions to define an interior space, the remainder structure including a first remainder portion and a second remainder portion, the first remainder portion being outside of the interior space, the second remainder portion being located in the interior space and connected to the semi-cylinder and the two ear portions;
• carrying out a cutout process, cutting the remainder structure out of the semi-finished head;
• obtaining a finished product of a head portion, the head portion including two wing plates and a shaft, each said wing plate being constructed by the two ear portions of the two semi-finished structures neighboring to each other on the processing direction, the shaft being constructed by the two semi-cylinders of the two semi-finished structures.