scholarly journals МОДЕЛЮВАННЯ ПРОЦЕСІВ ВИРУБКИ-ПРОБИВКИ ПЕРЕДАВАЛЬНИМИ СЕРЕДОВИЩАМИ

2021 ◽  
pp. 104-111
Author(s):  
А. Н. Застела ◽  
В. В. Борисевич
Keyword(s):  
Sheet Metal ◽  
Complex Geometry ◽  
Thin Sheet ◽  
Manufacturing Cost ◽  
Forming Process ◽  
Sheet Metal Stamping ◽  
Metal Stamping ◽  
Thin Sheet Metal

During improvement of the quality of products and reducing its cost, sheet metal stamping production, being the basis for the aerospace industry, should more intensively introduce modern production technologies, especially design. There are a large number of factors influencing the stamping process (especially parts with complex geometry), more comprehensive consideration of which would allow to optimize such processes, thereby reducing the manufacturing cost and improving the  quality. Currently the processes of forming and separation of complex parts by  of an elastic pad are of interest from the point of view of optimization and the final determination of the nature of the behavior of the material. This includes the refinement of such parameters as the maximum permissible thinning, the strength of the die. Clarification of these and other parameters will significantly reduce energy required. Determination of these and other parameters of sheet metal stamping is possible due to application of the modern analysis methods. For numerical studies in the sheet stamping production, the variational method or FEM is the most suitable. Computer modeling makes it possible to investigate the behavior of the material, the kinematics of the workpiece movement during forming process, select the correct loading scheme for the workpiece, and also makes it possible to consider several options for the location of the workpiece in the die, which is very important for  stamping thin sheet metal blanks. It provides a significant reduction of the time and costs for carrying out natural experiments, and decrease of technological preproduction preparation of sheet metal stamping. The development of a mathematical model based on the FEM makes it possible to determine not only the required parameters of the process, but also to consider the forming process during its certain stages, to determine the stress-strain state, indicating at the same time the problem zones of excessive thinning, loss of stability, the need to apply a die with a back pressure for cutting of thin sheet metal blanks. It allows to evaluate the quality of a ready product according to the calculated parameters, to use the results obtained for the design of elastic pad

Investigation of a Geometrical Base Parameter Affecting on Bending Quality in a Thin Sheet Metal

2017 ◽  
Vol 728 ◽  
pp. 66-71
Author(s):  
Aran Blattler ◽  
Maitri Kamonrattanapisud ◽  
Thanasan Intarakumthornchai ◽  
Yingyot Aue-u-Lan
Keyword(s):  
Sheet Metal ◽  
Thin Sheet ◽  
Fem Simulation ◽  
Roll Forming ◽  
Forming Process ◽  
Bending Process ◽  
Thin Sheet Metal ◽  
Bending Radius

A geometrical base parameter is investigated to determine the effect on a bending quality of a thin sheet metal for a roll forming process. This parameter is usually used as a criterion for the quality control of incoming materials for the bending process. This study was conducted by using a FEM simulation. The determination of the geometrical base parameter is considered as an appropriate and unique characteristic for each type of materials. To find this geometrical base parameter the dimensions of the workpiece must be measured while loading. The sensitivity of the bend allowance of a sheet metal is dependent on this geometrical base parameter. The high geometrical base parameter is led to indicate the elongation and the strength of the material. The principles of the geometrical base parameter are dependent on several factors, such as the bending angle, bending radius, material thickness, bend allowance, bending types and mechanical properties of materials. The outcomes of this study could provide the information used to enhance the bend quality of the sheet metal.

Numerical Simulation of Forming Process for Cover with Stiffening Components Made of Grade 2 Titanium Sheet Metal

2016 ◽  
Vol 687 ◽  
pp. 206-211
Author(s):  
Wojciech Więckowski
Keyword(s):  
Numerical Simulation ◽  
Sheet Metal ◽  
Empirical Studies ◽  
Strength Properties ◽  
Forming Process ◽  
Titanium Sheet ◽  
Plastic Properties ◽  
Fem Method

This study presents the findings of numerical simulations of forming process for an inspection hole cover with stiffening ribs made of thin grade 2 titanium sheet metal. The numerical simulation was carried out using the FEM method with PAMStamp 2G software. Numerical calculations were performed with consideration for the phenomenon of material strain hardening and anisotropy of plastic properties of the sheet metal formed. Properties of the grade 2 titanium alloy analysed in the simulations were adopted based on the results of the empirical studies. Adequate parameters of the forming process were selected in order to eliminate unfavourable phenomena of losing of material coherence and sheet metal wrinkling. The effect of conditions of friction between the sheet metal and tool and pressure force of the blank holder on the forming process was investigated. The analysis of the distribution of plastic strain and reduction in wall thickness of the drawn parts can be used for determination of the effect of changes in selected parameters and orientation of the specimen on the process of drawn part forming. The quality of drawn parts was assessed based on the shape inaccuracy determined during simulation of forming. The inaccuracy depended on the conditions of the process and strength properties of the titanium sheet metal.

Tool Wear in Sheet Metal Stamping

2011 ◽  
Vol 421 ◽  
pp. 750-753 ◽  
Author(s):  
Wen Yi Yan ◽  
Michael P. Pereira ◽  
Bernard F. Rolfe
Keyword(s):  
Steady State ◽  
Contact Pressure ◽  
Sheet Metal ◽  
Sliding Wear ◽  
Pressure Response ◽  
Forming Process ◽  
Element Analysis ◽  
Sheet Metal Stamping ◽  
Metal Stamping ◽  
Sliding Distance

This paper discusses our recent research on wear at the die radius in sheet metal stamping. According to wear theory, contact pressure and sliding distance are the two dominant factors in determining sliding wear. We applied the finite element analysis to accurately quantify the contact pressure and sliding distance at the die radius in sheet metal stamping. The results were then applied to analyze sliding wear at the die radius. We found that a typical two-peak steady-state contact pressure response exists during a channel forming process. The steady-state contact pressure response was preceded by an initial transient response, which produced extremely large and localized contact pressures. We proposed a method to numerically quantify the sliding distance, which was applied to examine the contact sliding distance at the die radius. Correlating the contact pressure and sliding distance, a new insight into the wear/galling that occurs at the die radius in sheet metal stamping was gained. The results show that the region close to zero degrees on the die radius is likely to experience the most wear, with the identified transient stage contributing to a large proportion of the total wear.

Environmental and Economic Evaluation of the Sheet Metal Stamping Process Using Alternative Lubricants

2019 ◽  
Author(s):  
Daniele Landi ◽  
Michele Germani ◽  
Marco Mandolini ◽  
Marco Marconi ◽  
Claudio Favi
Keyword(s):  
Economic Evaluation ◽  
Sheet Metal ◽  
Electric Energy ◽  
Manufacturing Cost ◽  
Sheet Metal Stamping ◽  
Electric Energy Consumption ◽  
Metal Stamping ◽  
Almost All ◽  
Sheet Metal Component

Abstract Sheet metal forming of tribologically difficult materials (e.g. stainless steel) or forming in tribologically difficult conditions (e.g. ironing, punching, deep drawing) require the use of environmentally hazardous lubricants, such as chlorinated paraffin oils in order to avoid galling. The present paper describes an environmental and economic evaluation of two alternative sheet metal stamping processes. The forming of a sheet metal component for boiler burners has been taken as case study for the analyses. In particular, two different lubricants (standard mineral versus polymer matrix-based lubricant) have been tested and compared. However, the differences among the two processes involves not only the lubrication phase, but also the electric energy consumption during the stamping and degreasing, as well as the typology of solvent (perchloroethylene versus water). Results obtained with the economic analysis show that the use of the alternative lubricant leads to a 16% reduction of the total manufacturing cost, mainly due to the optimization of the degreasing. Concerning environmental results, instead, no relevant differences can be observed for almost all the considered impact categories (ReCiPe midpoint and endpoint), since the optimized phases are not the most critical ones.

Whole Search Method of Space Sub-Domain of Sheet Metal Stamping

2013 ◽  
Vol 675 ◽  
pp. 244-247
Author(s):  
Xiao Ming Jiang ◽  
Chun Lai Hu ◽  
Wang Sheng Liu
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Metal Forming ◽  
Forming Process ◽  
Sheet Metal Stamping ◽  
Stamping Die ◽  
Finite Element Technology ◽  
Metal Stamping ◽  
Metal Forming Process ◽  
Die Forming

In the machining industry, sheet metal stamping is an important method of metal forming, and stamping die forming quality depends on the structure and process design, the use of finite element technology(FEM), computer simulation of sheet metal forming process, forming the law and indicates that there defects in order to achieve the most optimal design. This article describes the increased exposure to whole search to determine the finite element calculation speed and accuracy of a new method— space sub-domain method.

Sign in / Sign up

Export Citation Format

Share Document