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Because a roll threaded bolt has a smaller body diameter, it weighs significantly less than its complete bodied counterpart. This weight reduction reduces the cost of the steel, galvanizing, heat-treating, plating, freight, and any other charges associated with the fastener that are primarily based on weight.
In addition to undertaking a lot more function on one machine in significantly less time, thread rolling has a lot of technical benefits more than single point threading. As an alternative of cutting or shearing the material as is the case of single point threading, thread rolling cold forms the profile to be made. In this approach, the component material is stressed beyond its yield point, being deformed plastically, and hence permanently. A hardened die produced from tool steel or HSS displaces the material along the contours of the thread profile, plastically deforming the material into the final form. The workpiece material is stressed beyond its yield point, which causes it to flow and conform to the mirror image of the die’s profile.
Provision is also made in a two die roll machine for adjustably tilting the dies separately. This is achieved in 1 building by mounting a help for every single die roll on a pivot physique which provides for swinging the die axis in a common plane with the function axis to adjust for taper, and wherein the pivot physique is in turn adjustable about an axis perpendicular to its own axis so as to tilt the die roll axes oppositely in parallel planes for thread matching. The die roll support and pivot physique could also be fixed as a unit and moved laterally to adjust for function size. Such a machine might, if preferred and preferably, em? body any of the above described perform feeding and removing attributes.
However another embodiment of the present invention, a technique wherein the matching of the two dies is ensured by positioning the dies in such a way that crest and root of the threads are matched. Further embodiment of the present invention, a approach wherein the desired path of the rolls depends on the sort of thread to be rolled on blank, which is selected from Left thread or Right thread.