A Machinability Study of Mild Steel using Abrasive Water Jet Machining Technology
Abrasive water jet machining is a non conventional machining process in which removal of material takes place by impact erosion of high pressure, high velocity of water and entrained high velocity of grit abrasives on a work piece. The objective of experimental investigation is to conduct research of machining parameters impact on Material removal rate and Surface roughness of work piece of Mild Steel (MS). The approach was based on Taguchi’s method, analysis of variance and signal to noise ratio (SN Ratio) to optimize the Abrasive Water Jet Machining process parameters for effective machining and to predict the optimal choice for each AWJM parameter such as Traverse speed, Abrasive flow rate, and Standoff distance. There is L9 orthogonal array used by varying Transverse Seed, Abrasive flow rate, standoff distance respectively and for each combination we have conducted three experiments and with the help of Signal to Noise ratio we find out the optimum results for AWJM. It was confirmed that determined optimal combination of AWJM process parameters satisfy the real need for machining of Mild Steel (MS) in actual practice.
A Review on Abrasive Water Jet Machining On Different Material
Manufacturing processes mainly deals with material removal to shape a component from bulk material. Conventional machining processes have drawbacks such as low cutting rates, high tool wear and poor surface quality. Due to these drawbacks non-conventional machining introduced with higher cutting rates and better surface quality. Abrasive water jet machining (AWJM) is non-conventional machining process which capable to machine wide range of hard-to-cut materials. Absence of heat affected zone is the main attribute of the process which highlighted it among different unconventional processes. A systematic review of AWJM on different material is presented in this paper. ________________________________________________________________________________________________________
Repressive coping before and after diagnosis of breast cancer
Objective: The aim was to investigate to which extent emotional repression is a premorbid coping tendency of cancer patients and/or a coping response to the threat posed by a cancer diagnosis. The results of one previous study of breast cancer patients suggest the latter possibility, and our aim was to replicate and extend these findings.