| 摘要 |
A method and an apparatus for gripping temporarily the wire in an armature winding machine. The machine is of the type comprising a gripper formed by an arm (11) having an end (13) connected to a support (14) and the other free end (12) for gripping the wire. The free end (12) moves between a first position where it is approached to a winding zone and a second position where it is withdrawn from the winding zone. The gripper (12) translates then parallel to itself and integrally to the support (14), in vertical direction. The translation is operated by rotation of a driven axis (17) according to a predetermined function movement/time, whereby at each angular position of the axis a position of the gripper (12) univocally corresponds intermediate between the first and second position. The following advantages arise: the approach and withdrawal of the gripper from the commutator are very precise owing to axis control as position, speed and acceleration; the movement that the gripper (12,22) causes for cutting the wire can be controlled in a way different from that of withdrawal, in order to obtain a cut most favorable on the hook; the movement that the gripper causes for cutting the wire does not change angle of the stretched wire with respect to the hook of the commutator (3), in order not to cause the wire to slide on the hook.
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