scholarly journals A hammer blow to national ethics

Nature ◽  
2010 ◽  
Vol 467 (7318) ◽  
pp. 884-884 ◽  
Keyword(s):  
Hammer Blow

Development of technique for determining of stamping hammer blow efficiency

2021 ◽  
pp. 491-498
Author(s):  
A.M. Zolotov ◽  
M.O. Smirnov
Keyword(s):  
Mathematical Modelling ◽  
Turbine Blade ◽  
Technological Process ◽  
Stamping Process ◽  
Die Forging ◽  
Stage Process ◽  
Force Displacement ◽  
Hammer Blow

The multiple-stage process of large-sized turbine blade blanks on steam-air die-forging hammer is considered. Mathematical modelling of the stamping process of large-sized turbine blade on falling parts 25 t mass stamping hammer is carried out. Measurements of the number of hammer blows and the under-stamping of blade blanks at each stage of the technological process are performed. Method for determining of the hammer blow efficiency is developed. Diagram of the force—displacement of falling parts 25 t mass hammer is constructed. The dependence of the blow efficiency of falling parts 25 t mass hammer is obtained, with can be used in mathematical modelling of the stamping processes of large-sized forgings on this hammer.

Synthesis of High Density Insensitive Energetic Tetraazapentalene Derivatives

1995 ◽  
Vol 418 ◽  
Author(s):  
M. L. Trudell ◽  
G. Subramanian ◽  
G. Eck ◽  
J. H. Boyer
Keyword(s):  
High Density ◽  
Thermally Stable ◽  
Carbonyl Derivatives ◽  
Hammer Blow

AbstractAn improved nitration procedure has been developed for the synthesis of y-Tacot (3). The synthesis of y-DBBD (8) has been completed in three steps from 3 in 37% yield. y-DBBD (8) was found to be thermally stable up to 274 °C (decomposed) and insensitive to impact (hammer blow). Nitration of z-BDDB (6) and y-DBBD (8) gave carbonyl derivatives resulting from in situ hydroysis/oxidation of the corresponding tetranitro derivatives z-TBBD (7) and y-TBBD (9), respectively.

Hammer-Blow in Locomotives: Can it Not be Abolished Altogether?

1941 ◽  
Vol 146 (1) ◽  
pp. 163-166
Author(s):  
Harold Nugent Colam ◽  
John Douglas Watson
Keyword(s):  
Hammer Blow
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