scholarly journals Reduction of Springback for Hat Channel with High-Strength Steel Sheets by Stroke-Returning Deep-Drawing Process

2016 ◽  
Vol 57 (660) ◽  
pp. 60-65 ◽  
Author(s):  
Hayato KOMINE ◽  
Masayuki ASAKURA ◽  
Taro GEKA ◽  
Takuma KISO ◽  
Masato TAKAMURA ◽  
...  
Keyword(s):  
Deep Drawing ◽  
High Strength Steel ◽  
High Strength ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Steel Sheets

Effect of the Blank-Holding Load on the Drawing Force in the Deep-Drawing Process of Cylindrical and Square Cups

2015 ◽  
Vol 760 ◽  
pp. 379-384 ◽  
Author(s):  
Lucian Lazarescu ◽  
Ioan Nicodim ◽  
Dan Sorin Comsa ◽  
Dorel Banabic
Keyword(s):  
Aluminum Alloy ◽  
Deep Drawing ◽  
The Other ◽  
Drawing Process ◽  
Drawing Force ◽  
Forming Process ◽  
Deep Drawing Process ◽  
Steel Sheets ◽  
Other Hand ◽  
Blank Holding Force

In this study, the influence of the blank-holding force (BHF) on the drawing force (DF) in the deep-drawing process of cylindrical and square cups has been investigated experimentally. For this purpose, different constant and variable BHFs have been applied to AA6016-T4 aluminum alloy and DC04 steel sheets during the forming process. It has been observed that an increased constant BHF leads to an increase of DF. On the other hand, the variable BHF approach, in which the BHF decreases in six steps throughout the punch stroke, reduces the DF.

scholarly journals b EXPERIMENTAL AND FINITE ELEMENT ANALYSIS OF SQUARE DEEP DRAWING PROCESS FOR LAMINATED STEEL-BRASS SHEET METALS

2020 ◽  
Vol 20 (1) ◽  
pp. 12-24
Author(s):  
Hani Aziz Ameen
Keyword(s):  
Deep Drawing ◽  
Thickness Distribution ◽  
Low Carbon Steel ◽  
High Strength ◽  
Experimental Tests ◽  
Drawing Process ◽  
Low Carbon ◽  
Element Analysis ◽  
Blank Holder ◽  
Deep Drawing Process

In this paper, the drawability of two-layer (steel-brass) sheets to produce square cup, is investigated through numerical simulations, and experimental tests. Each material has its own benefits and drawbacks in terms of its physical, chemical and mechanical properties, so that the point of this investigation is taking the benefits of different materials, like (low density, high strength and resistibility of corrosion), at the same time and in a one part. ANSYS18 software is used to simulate the deep drawing process of laminated sheet. The deep drawing processes for square cup were carried out under various blank holder loads with different lubrication conditions (dry and lubricant) and with variable layer arrangement. The materials were low carbon steel st1008 and brass CuZn30 sheets with thickness of 0.5mm0and 0.58mm respectively. The thickness of laminated sheet blank was 1.1 mm and its diameter was 83 mm. The drawn cups with less imperfections and satisfactory thickness distribution were formed in this study. It is concluded the greatest thinning appear in the corner of the cup near the punch radius due to extreme stretching take place in this area. Experimental forming load, blank holder load, and thickness distribution are compared with simulation results. Good agreement between experimental and numerical is evident.

Reduction of Springback in Hat Channel with High-Strength Steel Sheetby Stroke Returning Deep Drawing

2013 ◽  
Vol 554-557 ◽  
pp. 1320-1330 ◽  
Author(s):  
Taro Geka ◽  
Masayuki Asakura ◽  
Takuma Kiso ◽  
Takashi Sugiyama ◽  
Masato Takamura ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Deep Drawing ◽  
High Strength Steel ◽  
High Strength ◽  
New Method ◽  
Dual Phase ◽  
High Tensile Strength ◽  
Blank Holder ◽  
Steel Sheets

This study investigated the twisting phenomenon in curved hat channel products made of dual-phase 980-MPa-class high-tensile-strength steel sheets. The stroke returning deep drawing (SRDD) method was proposed to deal with twisting. In this new method, after the punch reaches the bottom dead point, it returns to a certain drawing height without the blank holder being removed. With the application of the SRDD method, twisting hardly occurred, but sidewall curl increased. A two-step SRDD was then proposed to reduce the sidewall curl of SRDD products. In the two-step SRDD method, a stroke returning process is carried out in two steps under different conditions. The results showed that the two-step SRDD method reduced the sidewall curl and twist simultaneously.

scholarly journals Effect on Blank Holding Force on Blank Deformation at Direct and Indirect Hot Deep Drawings of Boron Steel Sheets

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 574 ◽  
Author(s):  
Hyung Yoon Seo ◽  
Chul Kyu Jin ◽  
Chung Gil Kang
Keyword(s):  
Deep Drawing ◽  
Boron Steel ◽  
Drawing Process ◽  
Hot Press ◽  
Deep Drawing Process ◽  
Steel Sheets ◽  
Punch Load ◽  
Blank Holding Force ◽  
Hot Press Process ◽  
Thinning Rate

This study involves performing direct and indirect hot press forming on ultra-high-strength steel (UHSS) boron steel sheets to determine formability. The indirect hot press process is performed as a cold deep drawing process, while the direct hot press process is performed as a hot deep drawing process. The initial blank temperature and the blank holding force are set as parameters to evaluate the performance of the direct and indirect deep drawing processes. The values of punch load and forming depth curve were obtained in the experiment. In addition, the hardness and microstructure of the boron steel sheets are examined to evaluate the mechanical properties of the material. The forming depth, maximum punch load, thickness, and thinning rate according to blank holding force were examined. The result shows that a larger blank holding force has a more significant effect on the variation of the thickness and thinning rate of the samples during the drawing process. Furthermore, the thinning rate of the deep drawing part in with and without fracture boundary was respectively examined.

Texture evolution of monolithic-phase and dual-phase steel sheets during a deep-drawing process

2011 ◽  
Vol 17 (3) ◽  
pp. 403-412 ◽  
Author(s):  
Hoe-Seok Yang ◽  
Baek-Seok Seong ◽  
Seong-Ho Han ◽  
Shi-Hoon Choi
Keyword(s):  
Deep Drawing ◽  
Dual Phase Steel ◽  
Texture Evolution ◽  
Dual Phase ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Steel Sheets

A Review on Deep Drawing Process

2018 ◽  
Vol 6 (6) ◽  
pp. 146
Author(s):  
D. Swapna ◽  
Ch, Srinivasa Rao ◽  
S. Radhika
Keyword(s):  
Sheet Metal ◽  
Deep Drawing ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Thin Sheet ◽  
High Strength ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Analysis And Design ◽  
Thin Sheet Metal

Deep Drawing (DD) process is the one in which a punch forces a flat sheet metal blank into a die cavity.  DD can also be described as the process which involves conversion of flat thin sheet metal blanks into parts of desired shape. Little work is available in the applications of DD processes at elevated temperatures which is going to be a very important manufacturing application in the coming decades. Deep Drawing (DD) is one of the sheet metal forming processes widely used in automobile, aerospace, electronics and allied industries to produce the hollow parts. The improvement in the deep drawing manufacturing process with latest methodologies leads to developments in the automobile and other sheet metal industries. Still today, this process of analysis and design is an art than science. Presently, the conventional deep drawing (CDD) operation is carried out at room temperature in industries. Although the deep drawing process of high strength / low formability metals has an extensive industrial application area, deep drawing at room temperature has serious difficulties because of the large amount of deformations revealed and high flow stresses of the materials. The present paper gives an overview of deep drawing process, its classification along with advantages, limitations and applications.

A study on heating and determining the temperature generation on the sheet metal before the deep drawing process

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040133
Author(s):  
The-Thanh Luyen ◽  
Thi-Bich Mac ◽  
Tien-Long Banh ◽  
Duc-Toan Nguyen
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Deep Drawing ◽  
High Strength ◽  
Heating System ◽  
Local Heat ◽  
Heating Time ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Processing Solution

Thermal-assisted machining (TAM) is an effective processing solution to improve productivity and product quality made from materials with high strength and hardness. This method is widely used in nonchip machining such as forging, stamping, deep drawing, etc. For the method of heating on the molds, it is possible to control local heat or uniform heat on the workpiece. However, the calculation of heat capacity, heat transfer as well as the heating time to achieve the temperature on the workpiece is necessary to design suitable molds and heating system. This study focuses on a heating system that uses single-sided thermostatic heating rods to heat the molds, verify the effect of the heating time on the temperature of the workpieces and then control the temperature on the workpieces at various heat levels through a heating control system. Thereby, this study proposes to build a mathematical model between temperature and heating time on the workpiece.

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