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CF (Cold Forming)
Cold Forming is a method of deforming coiled materials at a normal temperature with continuous force above a set level.
Deforming is a method of metallic material processing that renders a metal incapable of returning to its original shape through bending, stretching or beating the material with a force above a set level.
Because the whole material is processed, Cold Forming causes less waste of materials than cutting processes and less heat distortion than hot forging or warm processing. This process also requires less processing time.
Hot Forming is a method of processing heated materials. This method makes use of heat to soften the material in order that it may be processed more easily. Materials are heated to a little higher than the transformation temperature (point of metallic organization transformation) but a little lower than the point where the material starts melting, and are formed by using continuous force above a set level.
My Press is a process where metallic materials inserted into a die are pressed at a normal temperature with a force above a set level in order to meet required forms and dimensions. Because materials’ resistance to deformation is strong at normal temperatures, the change rate is smaller than in Hot Forming, and each stage of this process is subject to shape restrictions.
However, this method is highly productive and realizes high dimensional accuracy, while attaining a smooth surface.
These strong points greatly shorten machine processing operations allowing this method to achieve high yield rates.
In most automatic nut tappers, a tapping blade tool called a bent tap rotates and threads.
Threaded nuts fix the tap shank, thereby, enabling continuous tapping.
Merits and Demerits of forming
Comparison between forming and die-casting