Blank Shape Optimization in Deep Drawing with Combined Restraint

2013 ◽  
Vol 371 ◽  
pp. 178-182
Author(s):  
Viorel Paunoiu ◽  
Virgil Teodor
Keyword(s):  
Numerical Simulation ◽  
Deep Drawing ◽  
Degree Of Deformation ◽  
Initial Blank ◽  
Mathematical Relation ◽  
Blank Shape Optimization ◽  
Cylindrical Parts ◽  
Blank Shape ◽  
High Degree

One of the methods for increasing the degree of deformation in the deep drawing of the cylindrical parts is the method with the combined restraint. In this process, due to the high degree of deformation, the earing is pronounced and affects the quality of the final part. The paper focuses in optimization the blank shape in this process applying a method which combines a mathematical relation with the results of the numerical simulation. The mathematical relation connects the radii of the initial blank at the different angles with the sizes of the part heights at different angles. The numerical simulation using FEM was used for the heights determination at the main anisotropy directions considering different initial blank dimensions. An experimental work was done for certify the numerical results. The results confirmed that the optimization of the blank shape in deep drawing with the combined restraint is a key for improving the deformation process, for reduction the earing and for minimizing the material consumption.

Blank Shape Optimization in Sheet Hydroforming Process

2013 ◽  
Vol 549 ◽  
pp. 197-204
Author(s):  
Antonio del Prete ◽  
Gabriele Papadia ◽  
Teresa Primo ◽  
Silvia Schipa
Keyword(s):  
Experimental Tests ◽  
Slight Variation ◽  
Blank Holder ◽  
Sheet Hydroforming ◽  
Initial Blank ◽  
Metal Stamping ◽  
Blank Shape Optimization ◽  
Hydroforming Process ◽  
Blank Shape

Blank shape is one of the most important parameters of sheet metal stamping. In fact it can directly affect the forming quality of parts and it has to be taken in account in sheet hydroforming design. Reasonable blank shape not only can reduce materials and production cost but, also, it can improve the strain distribution of the material and product quality in the hydroforming process. However, it is not easy to find an optimal blank shape because of complexity of deformation behavior and presence of many process parameters like die radius, punch radius, punch speed, blank holder force and friction. In fact, they affect the result of the process i.e. tearing, wrinkling, springback and surface conditions such as earing. Even a slight variation in one of these parameters can result in defects. This paper reports numerical and experimental correlation for axis symmetrical hydroformed component using initial blank with different shape and size. Experimental tests have been carried out through the hydroforming cell tooling, designed by the authors thanks to a research project, characterized by a variable upper blankholder load of eight different hydraulic actuators. Two different initial blank shapes, square and circular, of same material and thickness have been used.

Blank shape optimization in the deep drawing process by sun method

2021 ◽  
Author(s):  
Hamidreza Gharehchahi ◽  
Mohammad Javad Kazemzadeh-Parsi ◽  
Ahmad Afsari ◽  
Mehrdad Mohammadi
Keyword(s):  
Shape Optimization ◽  
Deep Drawing ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Blank Shape Optimization ◽  
Blank Shape

scholarly journals The analysis of the parameters for deep drawing of cylindrical parts

2018 ◽  
Vol 178 ◽  
pp. 02011
Author(s):  
Dan Chiorescu ◽  
Esmeralda Chiorescu ◽  
Sergiu Olaru
Keyword(s):  
Finite Element ◽  
Deep Drawing ◽  
The Finite Element Method ◽  
Ansys Software ◽  
Forming Process ◽  
Thin Steel ◽  
Metal Forming Process ◽  
Cylindrical Parts ◽  
Cylindrical Cup ◽  
High Degree

Deep drawing is a very important metal forming process. Thin steel sheet is important material for manufacture of numerous products with deep drawing and stamping. Cold working provides also the possibility of making parts of various shapes, from the simplest to those with a high degree of complexity whose execution through other methods is uneconomical, difficult and sometimes even impossible. In this paper it is analyzed both experimentally and with the help of the finite element, the behavior of the blank during the cylindrical cup deep drawing process, using the ANSYS software program and the finite element method. A comparison is realized between the experimental and the analytical results, elaborating a representative set of problems that analyze the variation of the die punch clearance, movement of the punch and with or without lubrication. The results of the research are useful in developing a sensible design of experiments.

A Study on Initial Blank Design to Minimize Earing in Multi-Stage Deep Drawing Process for Rectangular Cup Using High Strength Steel Material

2013 ◽  
Vol 652-654 ◽  
pp. 1971-1975
Author(s):  
Pan Liu ◽  
Tae Wan Ku ◽  
Beom Soo Kang
Keyword(s):  
Deep Drawing ◽  
Sheet Material ◽  
Simulation Models ◽  
Drawing Process ◽  
Element Analysis ◽  
Normal Anisotropy ◽  
Deep Drawing Process ◽  
Initial Blank ◽  
Multi Stage ◽  
Blank Shape

Multi-stage deep drawing process for rectangular cups with extreme aspect ratio using finite element analysis is performed. The process is mainly consists of four forming stages including blanking, drawing, ironing and trimming. However, main deformation of the rectangular cup is completed during the drawing-ironing procedure. Tool design and blank modification for the multi-stage deep drawing process are presented. To consider the deep drawing and the ironing operations, the multi-stage deep drawing process is applied to obtain the rectangular cup by using each numerical simulation models from first to fifth drawing. Based on the design results of the initial blank, the multi-stage deep drawing process is performed, but it is shown that severe earing phenomenon is occurred at the upper flange part. To solve the severe deformation at the upper flange due to normal anisotropy of the used sheet material, initial blank modification is carried out. The simulation results for the rectangular cup are compared with the final configuration before and after the modification of the blank shape. The predicted result is confirmed that the modified blank shape not only improve the quality of a deep-drawn product but also reduce the cost of production.

1318 Optimization of Initial Blank Shape for Square Cup Deep Drawing

2014 ◽  
Vol 2014.51 (0) ◽  
pp. _1318-1_-_1318-2_
Author(s):  
Marina SAIKYO ◽  
Satoshi KITAYAMA
Keyword(s):  
Deep Drawing ◽  
Initial Blank ◽  
Blank Shape
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