Metal forming progress since 2000

Abstract

Considerable changes have occurred in metal forming in the last decade. A record of these changes can be found in keynote papers presented by the members of the Scientific Technical Committee-Forming, at the CIRP Annual General Meeting each year. The keynote papers are excellent references on important developments in metal forming and are used as a reference, globally. Not only is this paper a compendium of most of the keynotes presented, but from 2001 onward, it has updates on new information on five keynote subject areas. The authors of each keynote have written an update with new information that has developed since the writing of the keynote. The authors of each section are shown in order of presentation

Influence of size effects on material properties and springback behavior of metal foils in micro bending: A review

“…Therefore, a series of experiments of brass foils are being carried out to extensively investigate the influence of foil thickness, grain size and thickness to grain size ratio on material properties and springback behavior with a view to 09010-p. 5 [16,26].…”

“…With its booming development, the demand on the accuracy of the metallic micro parts is elevating and has stimulated the research on the precision evaluation of micro-formed parts. In terms of micro bending process, the springback, caused by elastic recovery during unloading, is an important factor significantly affects the dimensional accuracy of micro-bent parts [5,6].…”

Fabricate 2017

“…Research into resultant incrementally formed geometries has shown significant deviations from the planned geometries (Bambach et al, 2009), and that parameters including the forming velocity, the toolpath, the size of material and distance to supports and particularly the material springback of the sheet during forming all affect the geometric accuracy of the resulting shape. These geometric deviations are a key deterrent from the widespread take-up of the process (Jeswiet et al, 2008).…”

Blanking Clearance and Punch Velocity Effects on The Sheared Edge Characteristic in Micro-Blanking of Commercially Pure Copper Sheet

“…(2) where dp is the external diameter of the punch, dd is the internal diameter of the die, and t is the thickness of the specimen. The punch diameter variations result are shown in table 2 below.…”