Experimental investigation on the effet of input paramètres on surface roughness and MRR of abrasive flow machining process

A crucial and costly step in the whole manufacturing process is the precision and super finishing procedure. A step of final finishing is involved in the production of precision components. It accounts for a respectable portion of the cost of production overall, is mostly uncontrolled, and requires a lot of manpower. Abrasive finish methods are being developed to address issues including high direct costs and the production of precision components with particular characteristics for finishing inaccessible places. A vast number of cutting blades with arbitrary orientation and shape are used in the abrasive finishing process. Due to their ability to complete a variety of form geometries with the appropriate dimensional accuracy and surface polish, abrasive fine procedures are often used. The unconventional finishing method known as AFM (abrasive flow machining) presses abrasive viscoelastic polymer on the surface of work piece. Al7075/SiC NMMCs’ internal rounded and hollow surfaces are completed using an AFM trial procedure that is constructed and designed in conjunction with specially produced medium. Workpieces are created using a lathe shortly after stir casting metal matrix nano composites with cross sections of 25 mm in diameter and containing 1 percent,1 ,2,3,4 nano-Sic (50 nm) by weight. Extrusion pressure abrasive particle grain size number of cycles were evaluated for their surface roughness (Ra) than material removal (MR), respectively. The evaluation of the material’s qualities, such as density, hardness, and tensile strength The improvement in the surface completeness of these NMMCs is further shown by the scanning Microscopy OM, EDS SEM, and XED analyses

Optimized high speed turning on Inconel 718 using Taguchi method based Grey relational analysis

269-275Inconel 718, a Nickel based super alloy which has wide applications in aerospace industry particularly in the hot sections of gas turbine engines due to their high temperature strength and corrosion resistance. It is known as being among the most difficult-to-cut materials. This paper presents an optimum process parameters (speed, feed and depth of cut) to minimize the cutting force, surface roughness and tool flank wear together in CNC high speed dry turning of Inconel 718 using Taguchi method based Grey relational analysis. The study involved nine experiments based on Taguchi orthogonal array and the result indicates that the optimal process parameters are 60 m/min for speed, 0.05 mm/rev for feed and 0.2 mm for depth of cut from the selected range. Also the significant process parameters have been found out for the above process optimization by performing ANOVA. Confirmation tests with the optimal levels of cutting parameters are carried out in order to illustrate the effectiveness of the method

Densification behaviour of Al-Pb alloys –A study of effect of certain process parameters

56-60The recent research into the alternate sliding bearing materials unequivocally point to the beneficial role of lead in aluminum. But, these alloys offer a manufacturing challenge, due to wide immiscibility gap. For sliding bearing applications, controlled porosity (size, distribution and nature) is an important consideration, as it influences the tribological performance through mechanical properties and spreading of lead in aluminum matrix. In the present investigation, the effects of alloy composition, ball to charge ratio and mixing/milling route on densification behaviour of Al-Pb alloys processed through conventional ball milling and attrition milling routes, using XRD, SEM and compressibility test are studied. The resulting morphological changes of powder complexes are examined, on five compositions of alloys to determine compaction response. The study concludes that attrition milling is an effective method for densification of experimental alloys