scholarly journals Deep Drawing with Local Hardening on Digital Multi-axis Servo Press

2015 ◽  
Vol 28 (12) ◽  
pp. 1490-1495 ◽  
Author(s):  
Sebastian Kriechenbauer ◽  
Reinhard Mauermann ◽  
Dirk Landgrebe
Keyword(s):  
Deep Drawing ◽  
Servo Press ◽  
Local Hardening

Use of FE Simulation and Servo Press Capabilities in Forming of AHSS and Aluminum Alloys

2015 ◽  
Vol 639 ◽  
pp. 13-20 ◽  
Author(s):  
Ali Fallahiarezoodar ◽  
Long Ju ◽  
Taylan Altan
Keyword(s):  
Deep Drawing ◽  
Fe Simulation ◽  
Al Alloys ◽  
Form Complex ◽  
Servo Press ◽  
Complex Shapes ◽  
Die Set ◽  
Formed Part ◽  
Selection Of

Production of light weight and crash resistant vehicles require extensive use of AHSS (DP,TRIP,TWIP) and Al alloys to form complex shapes. This paper discusses practical determination of material properties and selection of lubricants for forming AHSS using a die set, designed for deep drawing. Tests were conducted in a 300 ton servo press. Thinning at the critical area of the formed part were measured and compared with FE simulation. Prediction of temperatures in deep drawing of selected DP steels and Al alloys in servo press is also discussed.

scholarly journals Deep-drawing and ironing of 1050 aluminum sheets loaded with vibration using NC servo press machine

2007 ◽  
Vol 57 (6) ◽  
pp. 240-244 ◽  
Author(s):  
Nobuhiro KOGA ◽  
Masayoshi ASAKA ◽  
Kunlachart JUNLAPEN
Keyword(s):  
Deep Drawing ◽  
Aluminum Sheets ◽  
Servo Press

Forming of Al 5182-O in a Servo Press at Room and Elevated Temperatures

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
Long Ju ◽  
Shrinivas Patil ◽  
Jim Dykeman ◽  
Taylan Altan
Keyword(s):  
Finite Element ◽  
Deep Drawing ◽  
Elevated Temperatures ◽  
Cost Effective ◽  
Element Model ◽  
Material Behavior ◽  
Bulge Test ◽  
Element Analysis ◽  
Automotive Manufacturing ◽  
Servo Press

Aluminum alloys are increasingly used in automotive manufacturing to save weight. The drawability of Al 5182-O has been proven at room temperature (RT) and it is also shown that formability is further enhanced at elevated temperatures (ETs) in the range of 250–350 °C. A cost effective application of ET forming of Al alloys can be achieved using heated blank and cold dies (HB–CD). In this study, the material behavior of Al 5182-O is characterized using tensile test and viscous bulge test at RT. The nonisothermal finite element model (FEM) of deep drawing is developed using the commercial software pamstamp. Initially, deep drawing simulations and tests were carried out at RT using a 300 ton servo press, with a hydraulic cushion. The predictions with flow stress curves obtained from tensile and bulge tests were compared with experimental data. The effect of punch speed and temperature rise during forming at RT is investigated. The warm forming simulations were carried out by combining material data at ETs obtained from the literature. The coupled effects of sheet temperatures and punch speeds are investigated through the finite element analysis (FEA) to provide guidelines for ET stamping of Al 5182-O.

Evaluation of Press Formability Using Servo Die Cushion in Deep Drawing

2010 ◽  
Vol 654-656 ◽  
pp. 322-325
Author(s):  
Akihiro Watanabe ◽  
Yuji Kotani ◽  
Hisaki Watari ◽  
Takehiro Shimizu
Keyword(s):  
Working Conditions ◽  
Deep Drawing ◽  
Manufacturing Process ◽  
Maximum Load ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Servo Press ◽  
Blank Holding Force ◽  
Conventional Press ◽  
Press Formability

Manufacturing process using servo press machines have been highlighted in car manufacturers and other industries in Japan. It is necessary to establish an appropriate press working conditions for manufacturing highly accurate products with great extra value. Our aim is to investigate into effects of variable BHF (blank holding force) on press formability, comparing to using a conventional press machine. In this study, FEM analyses of deep drawing process using a variable BHF system has been conducted to demonstrate the effectiveness of a servo die cushion on formability. According to experimental results obtained with a servo die cushion, it is found that maximum load subjected to dies was reduced by 11.8 %, when using a servo press with a servo die cushion comparing to a conventional press.

Effects of Elastic Behaviour of Dies and Servo Press Machine on Deep Drawing Process

2010 ◽  
Vol 89-91 ◽  
pp. 621-626 ◽  
Author(s):  
Akihiro Watanabe ◽  
Y. Kotani ◽  
K. Nishimura ◽  
Hisaki Watari ◽  
Takanori Yamazaki
Keyword(s):  
Elastic Deformation ◽  
Deep Drawing ◽  
Vertical Displacement ◽  
Elastic Behaviour ◽  
Deformation Analysis ◽  
Servo Press ◽  
Die Structure ◽  
The Press ◽  
Cad Simulation ◽  
Characteristic Features

Characteristic features of elastic deformation of dies and presses during deep drawing were measured to examine the effects of elastic deformation of the press and dies on product accuracy. Strains were measured on the press including dies, a slide and a bolster of a servo press. A strain magnitude of 63 ×10-6 was obtained when the slide position was at the lowest point. Two slide motions of the servo press were selected to determine appropriate manufacturing conditions. An elastic deformation analysis of the die structure was then performed by CAD simulation. To find an appropriate die structure model, the vertical displacement of the die structure in the CAD simulation was compared to the experiment results. It was found that the vertical displacement of the die structure was 0.147 [mm] at the top surface of the die when considering elastic deformation of the die structure as well as the bolster of the servo press.

Influence of Slide Stroke Curves on Forming Quality of Box Shaped Part during Deep Drawing

2012 ◽  
Vol 562-564 ◽  
pp. 1177-1181 ◽  
Author(s):  
Qin Xiang Xia ◽  
Teng Xu ◽  
Zhen Shi Li ◽  
Wei Ping Ruan
Keyword(s):  
Rotational Speed ◽  
Deep Drawing ◽  
Displacement Velocity ◽  
Servo Motor ◽  
Forming Quality ◽  
Servo Press ◽  
Mechanical Press ◽  
Shaped Part ◽  
Variable Displacement

To explore the influence of slide stroke curves on deep drawing and solve the problems of cracking and wrinkling during drawing, the deep drawing processes of box shaped part with the conventional mechanical press and servo press were simulated, respectively. The variation rules of cracking and wrinkling for box shaped part by different slide stroke curves were obtained. It shows that the qualified parts can be obtained more easily when drawing with servo presses by decreasing the rotational speed of servo motor at the forming stage due to its variability; drawing cycle can be shorten effectively by adjusting the variable displacement-velocity curves of servo press.

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