Synonyms
Definition
Stretching means tensile forming of a workpiece (sheet metal part, bulk metal part) by a tensile force which is externally applied and acting in the longitudinal axis of the workpiece.
Theory and Application
Generally, three different technological processes with various objectives can be differentiated in stretching (DIN 8585-2 2003).
- 1.
Elongating (stretching) to increase the dimensions of the workpiece in the direction of force, e.g., in order to adapt to specified dimensions
- 2.
Elongating (stretch leveling) in order to remove distortions from bars, profiles, and pipes and to remove dents from sheets
- 3.
Elongating (straightening by stretch bending) in order to extend the rolling stock during (after) rolling, expressed by the degree of stretching
According to DIN 8585 and DIN 8582, elongating is part of the subgroup tensile forming within the main group 2 – forming (DIN 8585-1 2003). During tensile...
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References
Bräutigam H, Becker S (2009) Richten mit Walzenrichtmaschinen [Straightening using roller straighteners]. Vogel Business Media, Würzburg. (in German)
DIN 8585-1 (2003) Fertigungsverfahren Zugumformen, Teil 1: Allgemeines; Einordnung, Unterteilung, Begriffe [Manufacturing processes forming under tensile conditions, part 1: general; Classification, subdivision, terms and definitions]. Deutsches Institut für Normung e.V, Berlin. (in German)
DIN 8585-2 (2003) Fertigungsverfahren Zugumformen, Teil 2: Längen; Einordnung, Unterteilung, Begriffe [Manufacturing processes under tensile conditions, part 2: stretch reducing; classification, subdivision, terms and definitions]. Deutsches Institut für Normung e.V, Berlin. (in German)
Fritz H, Schulze G (2006) Fertigungstechnik [Production engineering]. Springer, Berlin/Heidelberg. (in German)
Henrich Publikationen (2004) Mit “SCS” zur rostfreien Stahloberfläche? Streckrichten von Coils mit Beize- und Ölfreiem Fertigungsverfahren [Using SCS (Stretch Cold Roll Surface) for stainless surfaces? Pickle- and oil-free straightening of coils]. bbr Bänder Bleche Rohre 45 (2004) 1/2:32–34. (in German)
Lange K (1990) Umformtechnik: Handbuch für Industrie und Wissenschaft, Band 3: Blechbearbeitung [Metal forming: handbook for research and industry, vol 3: sheet metal forming]. Springer, Berlin/Heidelberg. (in German)
Spur G, Stöferle T (1985) Handbuch der Fertigungstechnik, Band 2/1–3: Umformen und Zerteilen [Production engineering handbook, vol 2/1–3: forming and separating]. Carl Hanser, München/Wien. (in German)
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Sterzing, A. (2019). Stretching. In: Chatti, S., Laperrière, L., Reinhart, G., Tolio, T. (eds) CIRP Encyclopedia of Production Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-53120-4_6519
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DOI: https://doi.org/10.1007/978-3-662-53120-4_6519
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