A mathematical model of the gripper separating fabric from a stack has been developed and the phenomena of separation actions of the layer examined. The assumptions made have been confirmed. Thanks to the motors, whose torques are controlled as a function of the size of the pressure, the gripper exerts a sufficient force on the separating fabric to prevent the slipping out of fabric while not exceeding the limit values which may cause damage to the fabric. A force value Nzad was established that the gripper would exert on the separating fabric to prevent it from slipping out while not exceeding the limit force. This is achieved by replacing the clamping spring in appropriate elements of the gripper and having an electric motor whose torque is controlled as a function of the size of the pressure. The feedback adjusts the value of electromotive forces eh and ev, and consequently the values of the current intensity ih and iv and driving torques motors Mmh and Mmv are obtained. Reducing pressures necessary to maintain the fabric is achieved by increasing the contact surface of the respective elements of the gripper. Entering the edge of the fabric between the respective elements of the gripper was realised by using the endless belt and then pulling the fabric by the force of friction in the direction of the blockage place where the fold entering between the belt and foot is formed. Computer programs describing the work of grippers for textiles allow analysis of the behavior of the system, which shortens the design process of the device. Modelling studies showed that there is a possibility to choose relevant parameters of these mechanisms. The model of the gripper developed, which is characterized by an increased working surface, was granted a patent as an invention on 31.01.2008.
Method of Separating Fabric from a Stack - Part 2
Fibres and Textiles in Eastern Europe ; 22 , 2 ; 79-83
2014
5 Seiten, Bilder, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
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