Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion

Influence of stepwise ram motion, one of practical ram motion controls of servo press, on shape and dimensional accuracies of forged billet was investigated in cold cup forging process by the finite element analysis. In the process with stepwise ram motion, the billet inserted in the container was f...

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Autores principales:	Ryo MATSUMOTO, Takuma KAGECHIKA, Hiroshi UTSUNOMIYA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	forging process stepwise ram motion servo press shape accuracy dimensional accuracy finite element analysis Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/eb95facbfb1e460a972ed88d31a5087f
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spelling	oai:doaj.org-article:eb95facbfb1e460a972ed88d31a5087f2021-11-29T05:43:34ZFinite element analysis of shape accuracy of billet cold-forged with stepwise ram motion2187-974510.1299/mej.18-00523https://doaj.org/article/eb95facbfb1e460a972ed88d31a5087f2019-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/3/6_18-00523/_pdf/-char/enhttps://doaj.org/toc/2187-9745Influence of stepwise ram motion, one of practical ram motion controls of servo press, on shape and dimensional accuracies of forged billet was investigated in cold cup forging process by the finite element analysis. In the process with stepwise ram motion, the billet inserted in the container was forged by the punch with upper ram of press, and the punch was operated with repetition of advance and pause modes. Following four stages were analyzed; (i) forging, (ii) removal of the punch from the forged billet, (iii) ejection of the forged billet from the container by the knockout punch and (iv) air cooling of the forged billet. In the analysis, the shape and dimensional changes of the inner wall of the billet during the four stages were investigated with several stepwise ram motions under the same forging duration. It is found that repetition of the punch advance with short stroke reduces heterogeneity of the temperature and stress distributions, so that the shape and dimensional accuracies of the inner wall of the forged billet were improved. The results of the finite element analysis were confirmed to be qualitatively agreed with the results of forging experiment on a link-type servo press.Ryo MATSUMOTOTakuma KAGECHIKAHiroshi UTSUNOMIYAThe Japan Society of Mechanical Engineersarticleforgingprocessstepwise ram motionservo pressshape accuracydimensional accuracyfinite element analysisMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 3, Pp 18-00523-18-00523 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	forging process stepwise ram motion servo press shape accuracy dimensional accuracy finite element analysis Mechanical engineering and machinery TJ1-1570
spellingShingle	forging process stepwise ram motion servo press shape accuracy dimensional accuracy finite element analysis Mechanical engineering and machinery TJ1-1570 Ryo MATSUMOTO Takuma KAGECHIKA Hiroshi UTSUNOMIYA Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
description	Influence of stepwise ram motion, one of practical ram motion controls of servo press, on shape and dimensional accuracies of forged billet was investigated in cold cup forging process by the finite element analysis. In the process with stepwise ram motion, the billet inserted in the container was forged by the punch with upper ram of press, and the punch was operated with repetition of advance and pause modes. Following four stages were analyzed; (i) forging, (ii) removal of the punch from the forged billet, (iii) ejection of the forged billet from the container by the knockout punch and (iv) air cooling of the forged billet. In the analysis, the shape and dimensional changes of the inner wall of the billet during the four stages were investigated with several stepwise ram motions under the same forging duration. It is found that repetition of the punch advance with short stroke reduces heterogeneity of the temperature and stress distributions, so that the shape and dimensional accuracies of the inner wall of the forged billet were improved. The results of the finite element analysis were confirmed to be qualitatively agreed with the results of forging experiment on a link-type servo press.
format	article
author	Ryo MATSUMOTO Takuma KAGECHIKA Hiroshi UTSUNOMIYA
author_facet	Ryo MATSUMOTO Takuma KAGECHIKA Hiroshi UTSUNOMIYA
author_sort	Ryo MATSUMOTO
title	Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
title_short	Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
title_full	Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
title_fullStr	Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
title_full_unstemmed	Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
title_sort	finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/eb95facbfb1e460a972ed88d31a5087f
work_keys_str_mv	AT ryomatsumoto finiteelementanalysisofshapeaccuracyofbilletcoldforgedwithstepwiserammotion AT takumakagechika finiteelementanalysisofshapeaccuracyofbilletcoldforgedwithstepwiserammotion AT hiroshiutsunomiya finiteelementanalysisofshapeaccuracyofbilletcoldforgedwithstepwiserammotion
_version_	1718407619725492224

Finite element analysis of shape accuracy of billet cold-forged with stepwise ram motion

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