 Cold forming provides remarkable flexibility making it possible to manufacture just about any geometrical shape. As shown in the picture, material is fed from a coil of wire into and through metal the wire working rollers online of the cold forming machine, where the metal wire is precisely cut by the wire shear working and transferred to the first of several die cavities where it is struck online with a punch or hammer (this is called ''a blow''). The first blow begins to form metal the shape of the fastener head while the second blow finishes working the form/shape desired. The complexity of the shape or design desired determines the number of blows required to online achieve that metal shape or design. self-sealing fasteners add another level of complexity by forming a precisely calculated groove in the undersurface of the fastener head at the same working time that the fastener head is formed. The fastener is transferred to as many dies as necessary to achieve the desired shape with little or no scrap. This online reduction in compressive load yields reduces internal stress on the fastener during the joining process, so the fastener is less likely to fatigue when in the field. The mating parts are also subjected to less stress during the manufacturing metal process. The working process also achieves a smooth finish online and in some cases, eliminates cracks caused by traditional riveting. Also, since the effective forming load typically does not exceed the fastener''s column strength, metal cold-head forming is possible without bending or swelling the fastener shank. “Orbital can replace fasteners such as screws, snap rings, threaded caps and working rivets,” “For instance, studs online cast in metal steel, aluminum, working and online zinc, or even those molded into plastic, can be orbitally formed.” After the head is formed, the end of the fastener shank opposite the fastener head is spun in a chamfer tool. This removes a small amount metal of metal working from the end of the fastener shank creating online a 30-45 degree chamfer angle on the end of the fastener shank. This chamfer acts as a thread relief when mating with internally threaded products. The fastener is then moved metal to a thread roller where the threads are formed into the fastener shank, ending the cold forming process. Strength and cost are two main considerations when choosing between working cold forming and machining. online When a part is cold formed the grain flow lines are neither cut nor broken but follow the contour of the upset. This process increases the tensile strength of the part. Cold formed parts as compared to machined parts are stronger and tougher both statically and in fatigue, therefore producing a higher quality end product. We are the ultimate online resource for many different metal working jobs. We have the most knowledgeable employees and the best equipment available so we can get the job done right.
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