Tool die for machining four-row chain

The utility model discloses a tool die for machining a four-row chain. The die comprises a die fixing base, an upper die and a lower die, a lower die base is arranged above the die fixing base, a positioning groove is formed in the lower die, a guide hole is formed in the positioning groove, a guide block is arranged in the guide hole, a compressed spring is arranged below the guide block, a holerecognizing pin is arranged above the guide block, and a guide column is arranged on the periphery of the lower die. Beneficial effects are that: the method is suitable for large-scale production; according to the utility model, the hole-recognizing pin and the pin shaft fixing hole are arranged; in the assembling process of the four-row chain, the holes between the chain plates and the shaft sleeves are recognized and compared through the hole recognizing pins, then the pin shafts are controlled by the hydraulic cylinders to be movably inserted into the holes of the chain plates and the shaftsleeves, the hole recogni