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Theoretical and Experimental Study of a Cement Finish Mill

100%
Magraoui R., Temmar M.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 3
507-510
EN
In this work, we study the dynamic behavior of a cement crusher. During its operation, several faults can occur. Our objective is to monitor the gear defect and other defects and make the necessary corrections. We model a part of the system: the gear transmission of the entire pinion-crown. We proceed to the simulation using a simulation program. Afterwards, we study the vibration behavior of the entire kinematic chain of the machine where we conduct programming vibrations of measurement points across all levels using vibration analysis software. The vibration measurements are realized with the aid of a data collector. The results of theoretical simulation are confronted with the analysis of experimental vibration measurements in order to determine the severity of mechanical faults and to establish an adequate vibratory prognosis.
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Applying a Numerical Model to Obtain the Temperature Distribution while Machining

81%
Melzi N., Temmar M., Ouali M.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 3
504-506
EN
The turning process is one of the best used processes in the mechanical industry. Therefore, the choice of the cutting parameters is very important in order to obtain a good machined surface quality. In this study, an analytical model and a modeling of the contact of the cutting tool with the work piece are developed for an orthogonal cutting process with a thermal analysis at the contact. The main aim is to predict the temperature while machining. By using the high-speed machining, we notice that the greater part of the heat, generated by the cutting process, is discharged into the cutting tool and the work piece. Indeed, when the cutting parameters, such as the cutting speed or the feed increase, the temperature increases too.
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