The establishment of a newly modified numerical global springback compensation method

Abstract

Abstract Part shape deviation caused by spring back is a quality problem in sheet metal forming. There are two major approaches, adjusting tooling shapes and adopting process control. This paper focused on tooling contour design. A new die design approach, called global compensation method (GC), has been proposed and it possesses following advantages. Compensation factor in displacement adjustment method (DA) is extended to a compensation matrix, thus every node has its own compensation magnitude and compensation direction, which are related to the global forming error.