Q. In stretch forming, spring-back is a very complicated problem which causes trouble in operating machines during the process.
✅ Correct Answer: (B)
false
Explanation: spring-back is basically defined as a phenomenon in which the material tries to regain its original shape during elastic loading condition. but in stretch forming process, the stretching and bending operations take place simultaneously which causes permanent deformation of the sheet metal. so, this combined effect results in negligible spring-back in the metal part and hence causes no problem in the operating machines.