Punching machine mechanical arm used for rotor sheet remachining

The invention discloses a punching machine mechanical arm used for rotor sheet remachining. The mechanical arm mainly comprises a mechanical transmission part, a feeding and amount judging part, a parameter regulating part, a control part and the like. The kinetic energy of the mechanical arm is obtained from a punching machine brake wheel through a transmission rod and drives a feeding rod to move leftwards and rightwards to send raw materials into a die to be machined. A judgment circuit judges the amount of a single time of feeding and is used in cooperation with a control system for controlling running of a punching machine and protecting the die. The parameter regulating part mainly regulates various parameters in the running process of the mechanical arm. The punching machine mechanical arm has the advantages that a rotor silicon steel sheet can be remachined under the condition that the punching machine intermittently works, and the punching machine mechanical arm is efficient, safe and high in yield.