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		Straightening - Course: Technique of working sheet metals, pipes and sections. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 16 p.)
			(introduction...)
			Preliminary Remarks
			Hints on Labour Safety
			1. Purpose of Straightening
			2. Tools, Devices and Auxiliary Means
			3. Processes within the Material
			4. Techniques of Straightening

1. Purpose of Straightening

Metal sheets, pipes or sections, which had been twisted, bent or deformed during transport or working may be given back their original form by means of various techniques.

Figure 1 Straightening of metal sheets

The mainly used techniques are hammering and bending for deformation work and local heating up for eliminating tension in materials.