Experimental study on electrical characteristics of gassy coal during extrusion process in different stage

2019 ◽  
Vol 12 (14) ◽  
Author(s):  
Peng Chen ◽  
Tao Yang ◽  
Xuexi Chen ◽  
Yongjie Liu ◽  
Xuelong Li ◽  
...  
2005 ◽  
Vol 98 (5) ◽  
pp. 054303 ◽  
Author(s):  
Seungmoon Pyo ◽  
Liping Ma ◽  
Jun He ◽  
Qianfei Xu ◽  
Yang Yang ◽  
...  

2018 ◽  
Vol 7 (3) ◽  
pp. 58
Author(s):  
Kosmatskiy Yaroslav Igorevich ◽  
Al-Khuzaie Ahmed Saleem Oleiwi ◽  
Al-Jumaili Mohammed Jasim Mohammed

The paper presents the results of an experimental study of the pipe extrusion process using the method of coordinate grids. The estimation of influence of separate conditions of friction on the contact surfaces of the deformable material and the pressing tool on metal flow pattern. The calculation of the forming operation is made for extrusion process stages.


1975 ◽  
Vol 97 (1) ◽  
pp. 18-23 ◽  
Author(s):  
P. Baque´ ◽  
J. Pantin ◽  
G. Jacob

The Ugine-Se´journet patent for glass lubrication of metals extrusion made it possible to extrude steel in large quantities. A cold pad of glass powder inserted between the die and the billet head melts progressively, providing a high viscosity glass film between the die and the metal. The authors propose a theoretical model of the lubrication mechanism: progressive melting, hydrodynamic flow, and stability of the film. The influence of process parameters is discussed and results are compared with experimental measurements.


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