Incremental forming by continuous bending under tension—An experimental investigation

2009 ◽  
Vol 209 (14) ◽  
pp. 5456-5463 ◽  
Author(s):  
W.C. Emmens ◽  
A.H. van den Boogaard
Keyword(s):  
Experimental Investigation ◽  
Incremental Forming ◽  
Continuous Bending ◽  
Bending Under Tension

Experimental Investigation of Key Process Parameters During Continuous-Bending-Under-Tension of AA6022-T4

2017 ◽  
Author(s):  
Edward M. Momanyi ◽  
Timothy J. Roemer ◽  
Brad L. Kinsey ◽  
Yannis P. Korkolis
Keyword(s):  
Experimental Investigation ◽  
Aluminum Alloys ◽  
Process Parameters ◽  
Tensile Tests ◽  
Load Cycle ◽  
Gauge Length ◽  
Uniaxial Tensile ◽  
Plastic Bending ◽  
Continuous Bending ◽  
Bending Under Tension

Continuous-Bending-Under-Tension (CBT) is an experimental technique that has been shown to increase elongation-to-fracture by over 100% in aluminum alloys and over 300% in steel as compared to uniaxial tensile tests [1]. This procedure is a modified form of a tensile test in which a specimen experiences 3 point plastic bending, induced by traversing 3 rollers back and forth over the gauge length, while simultaneously being pulled in tension. This process is able to delay the occurrence of necking in pure tension by suppressing the instability. Thus, significantly more elongation is achieved in the specimen prior to fracture. In this paper, an experimental investigation of key process parameters, i.e., bending depth and pulling speed, during CBT testing of AA6022-T4 is presented. The load cycle during a CBT test will also be discussed along with the strain induced throughout the gauge length.

Experimental Investigation of Single Point Incremental Forming of Aluminum Sheet in Groove Test

2017 ◽  
Vol 867 ◽  
pp. 177-183 ◽  
Author(s):  
Vikrant Sharma ◽  
Ashish Gohil ◽  
Bharat Modi
Keyword(s):  
Experimental Investigation ◽  
Incremental Forming ◽  
Single Point ◽  
Fractional Factorial ◽  
Single Point Incremental Forming ◽  
Forming Process ◽  
Backing Plate ◽  
Groove Test ◽  
Factorial Design Of Experiments ◽  
Tool Diameter

Incremental sheet forming is one of the latest processes in sheet metal forming industry which has drawn attention of various researchers. It has shown improved formability compared to stamping process. Single Point Incremental Forming (SPIF) process requires only hemispherical tool and no die is required hence, it is a die-less forming process. In this paper experimental investigation on SPIF for Aluminium sheet has been presented. A groove test on Vertical Machining Centre has been performed. Factors (Step depth, Blank holder clamping area, Backing plate radius, Program strategy, Feed rate and Tool diameter) affecting the process are identified and experiments are carried out using fractional factorial design of experiments. Effect of the factors on fractured depth, forming time and surface finish have been analyzed using Minitab 17 software.

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