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Cold Forming Processes - Thread Rolling
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Thread rolling is a cold forming process carried out on room
temperature blanks. Rotating hardened steel dies are pressed against
the surface of cylindrical blank. As the blank rolls against the
in-feeding die faces, the material is displaced, or cold worked to form the roots of
the thread. The displaced material flows radially outward to form
the thread's crest.
Unlike other threading processes, no material is removed, and no
waste chips are produced. Thus, less raw material is needed for a
Rolled Thread.
The cold forming gives your thread a higher fatigue strength. During
the threading process, the surface layer of the raw material is put
into compressive stress. There are no sharp corners in the root or tool
marks on the flanks to cause stress risers.
Click here to read an in-depth discussion on thread rolling technology and its applications.
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