scholarly journals Effect of Punch Shape on Multiprocess Tube Flaring for Eccentric Parts

2019 ◽  
Vol 60 (701) ◽  
pp. 182-186 ◽  
Author(s):  
Shohei TAMURA ◽  
Keinosuke IGUCHI ◽  
Masaaki MIZUMURA
Keyword(s):  
Tube Flaring ◽  
Punch Shape

scholarly journals Effect of Punch Shape on Multiprocess Tube Flaring for Eccentric Parts

2020 ◽  
Vol 61 (11) ◽  
pp. 2128-2133
Author(s):  
Shohei Tamura ◽  
Keinosuke Iguchi ◽  
Masaaki Mizumura
Keyword(s):  
Tube Flaring ◽  
Punch Shape

scholarly journals ECAP process improvement based on the design of rational inclined punch shapes for the acute-angled Segal 2θ-dies: CFD 2-D description of dead zone reduction

2015 ◽  
Vol 6 (1) ◽  
pp. 41-49 ◽  
Author(s):  
A. V. Perig ◽  
N. N. Golodenko
Keyword(s):  
Fluid Dynamics ◽  
Physical Simulation ◽  
Stokes Equations ◽  
Equal Channel Angular Extrusion ◽  
Dead Zone ◽  
Polymer Materials ◽  
Navier Stokes ◽  
Geometric Condition ◽  
Angular Pressing ◽  
Punch Shape

Abstract. This article is focused on a 2-D fluid dynamics description of punch shape geometry improvement for Equal Channel Angular Extrusion (ECAE) or Equal Channel Angular Pressing (ECAP) of viscous incompressible continuum through acute-angled Segal 2θ-dies with 2θ < 90°. It has been shown both experimentally with physical simulation and theoretically with computational fluid dynamics that for the best efficiency under the stated conditions, the geometric condition required is for the taper angle 2θ0 of the inclined oblique punch to be equal to the 2θ angle between the inlet and outlet channels of the Segal 2θ-die. Experimentally and theoretically determined rational geometric condition for the ECAP punch shape is especially prominent and significant for ECAP through the acute angled Segal 2θ-dies. With the application of Navier-Stokes equations in curl transfer form it has been shown that for the stated conditions, the introduction of an oblique inclined 2θ0-punch results in dead zone area downsizing and macroscopic rotation reduction during ECAP of a viscous incompressible continuum. The derived results can be significant when applied to the improvement of ECAP processing of both metal and polymer materials through Segal 2θ-dies.

scholarly journals Computation method of geometry die of stretch forming press

2018 ◽  
Vol 224 ◽  
pp. 04014
Author(s):  
Konstantin Bormotin ◽  
Win Aung
Keyword(s):  
Numerical Methods ◽  
Inverse Problems ◽  
Mathematical Models ◽  
Computation Method ◽  
Stretch Forming ◽  
Shell Forming ◽  
Punch Shape

Mathematical models and numerical methods for solving inverse problems of shell forming by means of stretching on a die have been developed. The algorithms implemented in MSC.Marc allow to calculate the required punch shape. The results of simulation of the stretching technology are presented.

410 Influence of Behavior of Material of Punch Shape on Locally-Lateral Upsetting

2015 ◽  
Vol 2015.23 (0) ◽  
pp. _410-1_-_410-4_
Author(s):  
Takashi NOMURA ◽  
Nguyen Sinh CON ◽  
Kazuhiko KITAMURA
Keyword(s):  
Punch Shape

Forming Mechanism of Folding Defect within Closed Die Forming Car Steering Knuckle

2011 ◽  
Vol 704-705 ◽  
pp. 240-244 ◽  
Author(s):  
De Ying Zhao ◽  
Lian Dong Zhang ◽  
Li Na Sun
Keyword(s):  
Extrusion Process ◽  
Steering System ◽  
Forming Process ◽  
Forming Mechanism ◽  
Lateral Extrusion ◽  
Folding Defect ◽  
Material Utilization ◽  
Punch Shape ◽  
Die Forming ◽  
Shape And Size

Steering knuckle is the key part of vehicle steering system. The forming technology combined closed die pre-forging with open finish-forging has some advantages such as higher material utilization ratio and lower forming forces and so on. While simulating the closed die extrusion forming process of car steering knuckle, folding defect emerges on the contact area of Branch I and lower punch in the lateral extrusion process. The forming mechanism of the folding defect is studied by numerical simulations and experiments, which mainly consider the influence of lower punch shape and size, extrusion speed and friction conditions to folding length. The results show that the main factors that affect folding defects are the lower punch shape and size. Keywords: steering knuckle, folding defect, closed die forming, numerical simulation, experiment study

Sign in / Sign up

Export Citation Format

Share Document