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 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 the wire rollers of the cold forming machine, where the wire is precisely cut by the wire shear and transferred to the first of several die cavities where it is struck with a punch or hammer (this is called ''a blow''). The first blow begins to form the shape of the fastener head while metalworked the second blow finishes the form/shape desired. The complexity of the shape or design desired determines the number of blows required to achieve that shape or design. self-sealing fasteners add another level of complexity by forming a precisely calculated groove in the undersurface metalworked of the fastener head at the same 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. Orbitforming is also sometimes called spinning, radial riveting, brackering, spin riveting, peening or metalworked noiseless riveting. Orbitforming is used to head, swage, crown, flare or draw a column or projection of malleable material and is used most often in fastening and assembly to produce a high quality head form - to rivet without disruption of component material grain structure. While similar in nature to impact or compression forming and riveting in that a compressive axial load is applied to the part being formed, the axial load is greatly reduced due to the mechanical advantage of the angular orbiting tool and progressive forming action. The axial load required for forming is reduced up to 80% with orbital due to this mechanical advantage. This 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 process. metalworked The metalworked process also achieves a smooth finish 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, metalworked cold-head forming is possible without bending or swelling the fastener shank. “Orbital can replace fasteners such as screws, snap rings, threaded caps and rivets,” “For instance, studs cast in steel, aluminum, zinc, or even those molded into plastic, can be orbitally formed.” 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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