Effects of deep drawing process in microstructure of stainless steel S304

Product quality is one of the important aspects in deep drawing practice and the variation in process temperature was claimed to improve the quality. Therefore, in this research, the effect of the heating temperature on the drawability of a circular metal cup has been investigated. Firstly, circular metal cups of aluminium, mild steel and stainless steel were drawn from the blank diameters of 60 mm, 65 mm, and 70 mm. The experiment was conducted at room temperature followed by at 100 °C, 150 °C and 200 °C. The Taguchi method was selected as the design of experiment approach, and L9 (34) array design methodology was adopted in this experimental research. The drawability was measured based on the punching force needed to deform the sheet metal blanks. The deep drawing process was conducted at room, and elevated temperature conditions and the response factor was analysed and compared through the analysis of variance (ANOVA) statistical approach. The results obtained from ANOVA indicate that the blank material has a significant influence on the deep drawing process followed by the blank size, heating temperature and heating technique. The optimal parameter combinations are blank diameter of 60 mm, heating temperature of 200 °C and the die and punch heating technique. Out of the three materials investigated, aluminium has a better drawability compared to mild steel and stainless steel.

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Numerical investigation of the effect of punch corner radius and die shoulder radius on the flange earrings for AA1050 and AA1100 aluminum alloys in cylindrical deep drawing process

Heliyon ◽

10.1016/j.heliyon.2021.e06662 ◽

2021 ◽

Vol 7 (4) ◽

pp. e06662

Author(s):

K. Bouchaâla ◽

M.F. Ghanameh ◽

M. Faqir ◽

M. Mada ◽

E. Essadiqi

Keyword(s):

Aluminum Alloys ◽

Numerical Investigation ◽

Deep Drawing ◽

Drawing Process ◽

Deep Drawing Process ◽

Corner Radius

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Effect of Tool Geometry Parameters on the Formability of a Camera Cover in the Deep Drawing Process

Materials ◽

10.3390/ma14143993 ◽

2021 ◽

Vol 14 (14) ◽

pp. 3993

Author(s):

Thanh Trung Do ◽

Pham Son Minh ◽

Nhan Le

Keyword(s):

Deep Drawing ◽

Thickness Distribution ◽

Metal Flow ◽

Sheet Thickness ◽

Side Wall ◽

Tool Geometry ◽

Drawing Process ◽

Nose Radius ◽

Deep Drawing Process

The formability of the drawn part in the deep drawing process depends not only on the material properties, but also on the equipment used, metal flow control and tool parameters. The most common defects can be the thickening, stretching and splitting. However, the optimization of tools including the die and punch parameters leads to a reduction of the defects and improves the quality of the products. In this paper, the formability of the camera cover by aluminum alloy A1050 in the deep drawing process was examined relating to the tool geometry parameters based on numerical and experimental analyses. The results showed that the thickness was the smallest and the stress was the highest at one of the bottom corners where the biaxial stretching was the predominant mode of deformation. The problems of the thickening at the flange area, the stretching at the side wall and the splitting at the bottom corners could be prevented when the tool parameters were optimized that related to the thickness and stress. It was clear that the optimal thickness distribution of the camera cover was obtained by the design of tools with the best values—with the die edge radius 10 times, the pocket radius on the bottom of the die 5 times, and the punch nose radius 2.5 times the sheet thickness. Additionally, the quality of the camera cover was improved with a maximum thinning of 25% experimentally, and it was within the suggested maximum allowable thickness reduction of 45% for various industrial applications after optimizing the tool geometry parameters in the deep drawing process.

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Blank shape optimization in the deep drawing process by sun method

Production Engineering ◽

10.1007/s11740-021-01049-z ◽

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

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Production of Tapered Cups by Sequential Deep Drawing of Sheet Metals Using Drawn Cups as a Part of Punch

Journal of Engineering for Industry ◽

10.1115/1.2901653 ◽

1993 ◽

Vol 115 (2) ◽

pp. 224-229 ◽

Cited By ~ 2

Author(s):

K. Yamaguchi ◽

K. Kanayama ◽

M. H. Parsa ◽

N. Takakura

Keyword(s):

Deep Drawing ◽

Drawing Ratio ◽

Drawing Process ◽

Sheet Metals ◽

Deep Drawing Process ◽

Drawing Method

A new deep drawing process of sheet metals is developed to facilitate small-lot production of deep cups with large drawing ratio. In this process, unlike the conventional deep drawing method, a few drawn cups are always stacked on the punch and used as a part of punch for the subsequent deep drawing of a given blank. Before drawing a new blank, a drawn cup which is in contact with the punch is stripped off. The repetition of such stripping and drawing operations makes it possible to carry out both the first-stage drawing and the subsequent slight redrawings in one drawing operation using only one pair of punch and die. In this paper, this new deep drawing process is applied to the production of tapered cups and the main feature of the process is shown.

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