Experimental Analysis on the Frictional Behaviour of Drawbeads in Sheet Metal Forming

2007 ◽  
Vol 78 (12) ◽  
pp. 884-889 ◽  
Author(s):  
J.H. Jang ◽  
W.T. Kim ◽  
C.J. Van Tyne ◽  
Y.H. Moon
2012 ◽  
Vol 504-506 ◽  
pp. 537-542 ◽  
Author(s):  
Francesco Sgarabotto ◽  
Andrea Ghiotti

In last decades, national legislations have become even more restrictive with respect to the application and the disposal of hazardous lubricants in sheet metal forming. The introduction and the continuous improvement of environmental friendly solutions has seen a continuous growth and attention, but today the usage of traditional hazardous lubricants is still significant, requiring expensive cleaning operations and harmful cleaning agents to remove them. The use of solid organic lubricants can reduce or eliminate this drawback, despite their performances may be significantly affected by specific process parameters and the presence of debris. In this paper the performances of a solid organic lubricant have been compared to traditional liquid lubricants applied to sheet metal forming applications. Different surface topographies have been reproduced and the effects in terms of frictional behaviour have been investigated.


2013 ◽  
Vol 549 ◽  
pp. 381-388 ◽  
Author(s):  
Francesco Sgarabotto ◽  
Andrea Ghiotti ◽  
Stefania Bruschi

In the last decades, national legislations have become even more restrictive about the application and the disposal of hazardous lubricants in sheet metal forming. As a result, metal forming industry, which traditionally has made large use of synthetic and oil-based lubricants to enhance the production rate and reducing the wear of tools, has been forced to study and develop new solutions to reduce the environmental impact of production processes. The introduction and the continuous improvement of environmental friendly lubrication systems has seen a continuous growth and attention, but today the usage of traditional hazardous lubricants is still significant, requiring expensive cleaning operations and harmful cleaning agents to remove them. The use of solid organic lubricants can reduce or eliminate this drawback, despite their performances may be significantly affected by specific process parameters and the presence of debris. In this paper the performances of a solid organic lubricant have been compared to traditional liquid lubricants applied to sheet metal forming applications. Different surface topographies have been reproduced and the effects in terms of frictional behaviour have been investigated.


1998 ◽  
Vol 80-81 ◽  
pp. 251-256 ◽  
Author(s):  
J.M Lanzon ◽  
M.J Cardew-Hall ◽  
P.D Hodgson

CIRP Annals ◽  
2009 ◽  
Vol 58 (1) ◽  
pp. 279-282 ◽  
Author(s):  
Welf-Guntram Drossel ◽  
Sebastian Hensel ◽  
Burkhard Kranz ◽  
Matthias Nestler ◽  
Angela Goeschel

2021 ◽  
Vol 44 ◽  
pp. 2855-2858
Author(s):  
Baloji Dharavath ◽  
Dinesh Varma ◽  
Swadesh Kumar Singh ◽  
M.T. Naik

2009 ◽  
Vol 2 (1) ◽  
pp. 465-471 ◽  
Author(s):  
Rui Zhou ◽  
Ibrahim AlAli ◽  
Jian Cao ◽  
Qian Wang ◽  
Z. Cedric Xia

Author(s):  
Е. А. Фролов ◽  
В. В. Агарков ◽  
С. И. Кравченко ◽  
С. Г. Ясько

To determine the accuracy of the readjustable punches for separating operations (perforation + punching out) of sheet-metal forming, the accuracy parameters were analyzed using the random balance method using the method of experiment planning. Analytical dependencies are obtained to determine the values of deviation of the outer and inner contour dimensions of perforated and punched out sheet parts. From the dependencies obtained, it is possible to estimate and predict the value of deviation in the dimensions of the resulting part at any time during the operation of the punch. Practical recommendations on the calculation of the actuating dimensions of the working elements (stamping punch, matrix) of readjustable punches are offered.


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