Application and improvement of forming precision to a forming machine: development of computer-aided bending test and forming machine II

摘要

A computer-aided repeat bending test machine has been developed previously, and its performance was presented in a previous paper. It was shown that the machine can be used as both a bending machine and a bending test machine. However, thismachine did not uniformly bent the specimens. In order to solve this problem, the increment of table transfer was changed to the proper rate (named "offset"), and more precise formings were realised. In addition to cylindrical forming by this machine,S-shape and Q-shape forming were carried out successfully. Bending in two directions as also carried out by using arc-shaped chucks. In convex and concave shape formings, the curvature distribution of the second bending direction was not uniform. In order to reduce nonuniformity, the effectiveness of tensile force were examined experimentally.