Multistage tool path strategy to produce hemispherical shape using single point incremental forming process
by Ashish M. Gohil; Bharat A. Modi
International Journal of Mechatronics and Manufacturing Systems (IJMMS), Vol. 14, No. 3/4, 2021

Abstract: Single-stage toolpath strategies used in the single point incremental forming process are suffering the problems related to formability, geometric accuracy, and non-uniform thinning. A multistage forming strategy can be used to improve the same, however, it leads to the formation of protrusion defect due to rigid body translation. In this paper, the multistage toolpath strategy has been proposed to circumvent this issue for hemispherical shape which is difficult to produce using a single-stage forming strategy due to 90 tool entry angle at the base. The proposed strategy doesn't require the calculation of rigid body translation and produces the hemispherical shape without the formation of protrusion defect. Enhancement in formability using proposed multistage forming strategy, in terms of depth of forming, uniform strain distribution and thinning have been presented based on experimental and numerical investigation. The limiting value of percentage increase in surface area during the stage is found to be 30.

Online publication date: Tue, 01-Mar-2022

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