Metal screw

fasteningflat-headwith hexagonal head

The screw is an essential fastening element in mechanical engineering, characterised by a cylindrical shank with one or more threads enabling it to be joined to various materials. The design of a screw involves specifications such as diameter, length, type of thread and manufacturing material, often stainless steel or specific alloys, adapted to the mechanical and environmental requirements. Making the screw blank Making a screw blank from coils of wire using cold heading machines is an innovative and efficient process in industrial manufacturing. This method relies on the use of mechanical forces to deform the metal without heating it, thereby preserving the properties of the materials while optimising dimensional accuracy. The process begins by feeding the machine with coils of wire, often steel, which are then unwound and cut to predefined lengths. Using forming dies, the cold heading process shapes these lengths into a screw blank using repeated blows. This system has the advantage of reducing material losses and minimising production costs. In addition, the technique ensures homogeneity in the structure of the metal, giving the screws produced greater strength. This type of manufacturing also meets the growing demands for durability and energy efficiency in today's industrial processes. Rolling This is followed by the rolling phase, where a rotating tool shapes the threads of the screw.