Abstract
In sheet-metal bending, defects relating to the component-forms such as springback are common. This is due to the elastic deflection that occurs in the material after the bending process takes place. The objective of the research is to study on the springback behaviour in micro sheet-metal parts. This paper reports an investigation concerning the influence of the material rolling direction on springback in the case of w-shaped bending parts. Micro bending parts using 316 L annealed stainless steel strips having thickness of 50 μm, 75 μm and 100 μm respectively were formed. The tensile and bending behaviours of the parts were observed through the experiment by considering the effect of rolling direction and size-effect related errors. The results revealed that various parameters influence the springback, such as thickness of the sheet, force applied, material rolling-direction and holding time during the sheet-deformation. The scale of the springback was also observed to be random among the parts made with a same sheet material.
Highlights
Regarding precision sheet-metal forming, products such as flat springs, spring clips, micro connectors, micro grippers, etc. have served many industries, from aerospace, medical to electronics industries; these products may be small, complicated and commonly consist of several challenging features to manufacture because of their sizes.There are many important factors worthy being mentioned when describing a micro manufacturing process
This paper reports an investigation concerning the influence of the material rolling direction on springback in the case of w-shaped bending parts
The tensile and bending behaviours of the parts were observed through the experiment by considering the effect of rolling direction and size-effect related errors
Summary
Regarding precision sheet-metal forming, products such as flat springs, spring clips, micro connectors, micro grippers, etc. have served many industries, from aerospace, medical to electronics industries; these products may be small, complicated and commonly consist of several challenging features to manufacture because of their sizes.There are many important factors worthy being mentioned when describing a micro manufacturing process. Regarding precision sheet-metal forming, products such as flat springs, spring clips, micro connectors, micro grippers, etc. Have served many industries, from aerospace, medical to electronics industries; these products may be small, complicated and commonly consist of several challenging features to manufacture because of their sizes. There are many important factors worthy being mentioned when describing a micro manufacturing process. One needs to consider size effect, force applied, lubrication condition, bending of micro part, tooling, material handling, etc. The size effect occurs when the part and the process parameter were scaled down, the design cannot follow the rules normally used for macro forming. Size effect has been studied intensively, recently. Few studies have been made to address springback in the microforming. The study showed an effect of the grain size on springback
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