Cutting system for wire processing machines

A wire processing machine comprising a cutting system, the cutting system comprising:

• a crankshaft;
• an asynchronous electric motor directly coupled with the crankshaft, without a transmission gearing between the asynchronous electric motor and the crankshaft;
• a gyrating mass connected to the asynchronous motor, the gyrating mass providing kinetic energy upon the rotation of the asynchronous motor and the crankshaft, the gyrating mass positioned such that kinetic energy is released upon an impingement of the knife on a wire being cut;
• and
• a knife connecting to the crankshaft by way of a connecting rod and the knife constrained by a guide whereby reciprocating cutting motion is provided by the knife upon rotation of the crankshaft by the motor, and wherein the asynchronous motor is connected to the crankshaft such that a single rotation of the asynchronous motor translates to a single rotation of the crankshaft and one complete cutting cycle, wherein said asynchronous electric motor is accelerated only up to a rotational position of the cutting cycle that corresponds to a start of a cut and is braked at a rotational position of the cutting cycle that corresponds to an immediate completion of the cut.

A method of cutting wire in a wire processing machine comprising the steps of:

• providing an asynchronous motor with a motion translation mechanism including a crankshaft having a rotational position of 0° to 360°;
• providing the crankshaft connected to a cutting knife whereby a single rotation of the crankshaft translates into a single cutting cycle with a cutting process occurring in the range of 160° to 180°;
• and
• controlling the asynchronous motor based on the relative position of the crankshaft or knife such that motor is accelerated when the crankshaft is in the range of 0° to 180° and is braked when in the range of 180° to 360°.