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Improve Single Point Incremental Forming Process Performance Using Primary Stretching Forming Process

Bedan Aqeel Sabree, Shabeeb Alaa Hassan, Hussein Emad Ali

Advances in Science and Technology. Research Journal

2023

Vol. 17, no 5

260--268

Incremental forming (IF) is one of the sheet metals forming technique where is a sheet formed into a final workpiece using a series of small incremental sheet deformations. In Incremental sheet metal forming process, one of the important steps is to produce the forming part with acceptable performance such as product accurate and uniform thickness distribution with a homogenous grain distribution that consider as the main challenge of incremental sheet metal forming process. This work is carried out to find the best method to control the product performance of the final parts using a new method of applying a primary stretching forming process with a hemispherical forming tool followed by single point forming SPIF. Different primary forming depth (10, 20, 30 and 40 mm) were applied to find their effect on the forming behavior of the final product and compare them to the single point forming product without using a primary forming process. The experimental results showed the improvement in microstructure by applying SPIF process after primary stretching, with grain size of 36 µm at 40 mm forming depth as compared to 52 µm when using pure SPIF, a twining effects presence in both cases. A high improvement with a minimum dimension deviation of (6%) with respect to the forming process in single point incremental forming process without a primary forming process that result forming deviation equal to (11.6%) with respect to the desired design. The thickness distribution of the final product also improved by applying the primary stretching forming process before the SPIF process reaches to (6.9%, 9.1%, 14.9% and 21.5%) at forming depth (10, 20, 30 and 40) mm, respectively.

Accuracy of investment castings

Horáček M.

Archiwum Odlewnictwa

2005

R. 5, nr 15

121--137

In the paper the analysis of wax pattern and casting dimensions changes during each stages of investment casting technology process has been presented. Results of wax patterns and castings of test plate free and restrained contractions dimensions changes research carried out in Department of Foundry Engineering at Brno University of Technology have been presented as well. Moreover obtained results were compared with results of casing “industrial” casting dimension changes research.

W artykule przedstawiono analizę zmian wymiarowych modelu woskowego i odlewu w poszczególnych etapach procesu odlewnia metodą traconego wosku. Przedstawiono także wyniki badań zmian wymiarowych odlewów płyty testowej ze skurczem swobodnym i hamowanym przeprowadzonych Katedrze Odlewnictwa Politechniki w Brnie, które skonfrontowano z badaniami przeprowadzonymi na przemysłowym odlewie obudowy.