Parameters Substantiation of Guide Surface of Flat Material into the Processing Area

The transporting and feeding devices of technological machines have to ensure the transportation and supply of any sheet material, including leather semi-finished product without folds, into the working area of the rolling pair. In the transition section between the feed conveyor and the roll pair, when there is an insufficient friction between the sheet material and the surface of the lower work roll, problems may arise, i.e. accumulation, twisting or retention of sheet material will occur. To prevent such cases, it is recommended to use the guide surface of the processed leather semi-finished product in the processing zone, which provides a smooth transition of the leather semi-finished product to the contact area of the roll pair. The paper presents theoretical preconditions for determining the type (shape) of the guide surface of a flat material into the processing zone. The problem of smooth supply of flat material to the processing zone of the roll pair has been solved. To solve the problem of smooth feeding of the flat material into the processing zone of the roll pair, by selecting the curve of the guide surface, differential equations of material motion are finalised. By the numerical method Graphic dependences is derived that allow depending on the initial parameters of the machine and the leather semi-finished product determining the required parameters of the guide surface of conveying device, providing a smooth supply of flat material into the processing zone of the working roll pair.