Devolopment of Curvilinear Slitting Apparatus of Thin Sheet Metals and Its Applications

点击翻译按钮获取中文摘要

A new method is proposed for curvilinear slitting or cutting of thin sheet materials, in which a rolling mill and piano wires are used as a versatile cutting device and tool. Various curves can be generated at the entrance of the rolls by using a computer controlled guide which moves the piano wire in the direction of the width of a sheet. A relationship between the movement of the guide at the entrance of rools and the generated curve at the exit of rolls is derived from geometrical consideration. The effects of wire diameter d and roll gap G on the quality and dimensional accuracy of slitted products are also examined experimentally. The experimental results show that the slitting of aluminium sheet of 0.1 mm thickness can be successfully carried out by using a wire with diameter equal to or slightly larger than the thickness of sheet and by setting the roll gap G slightly larger that the wire diameter d. The quality of the edge of slitted sheet depends on the shape of wire used, but it should be emphasized that there is no burr at the slitted edge. It is also shown that not only the curvilinear slitting of sheet materials but also other value added processes such as tapered slittting and in-plane bending of a sheet with curvilinear hem can be easily achieved by this new method.