Manufacturing Technology Today

D. Deepak ¹, Rupinder Singh ², Maninderjit Singh ²

Affiliations
1 Dept. of Mech. Engg., R. I. E. I. T., Railmajra, Dist. Nawanshahr (Pb.), IN
2 Dept. of Mech. & Prod. Engg., GNDEC, Ludhiana (Pb.), IN

Abstract

In the present study a modest attempt has been made to develop aluminium based silicon carbide particulate. Aluminium (98.41% C.P) and SiC (320-grit) has been chosen as matrix and reinforcement material respectively. Experimental study has been conducted by varying weight fraction of SiC (5%, 10%, 15%, 20%, 25%, and 30%), while keeping all other parameters constant. The results indicate that the 'newly developed method' is quite successful to obtain uniform dispersion of reinforcement in the matrix. An increasing trend of hardness and impact strength with increase in weight percentage of SiC has been observed. The best results have been achieved with 25% weight fraction of SiC.

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Rupinder Singh ¹

Affiliations
1 Dept. of Mechanical & Production Engg., G.N.D.E. College, Ludhiana, IN

Abstract

In the present study, an effort has been made to experimentally explore the temperature effect in ultrasonic impact grinding of pure titanium, using high-speed steel, tungsten carbide and stainless steel tools. Two output parameters namely material removal rate and tool wear rate (at three different slurry temperatures 10°C, 27°C, and 60°C) were selected to access the capability of ultrasonic impact grinding. The results suggested that the temperature has not significant effect on the material removal rate and tool wear rate in ultrasonic impact grinding of commercially pure titanium. Further more, material removal rate and tool wear rate were greatly influenced by work-tool material relative hardness.

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Rajesh Kumar ¹, Rupinder Singh ²

Affiliations
1 Mechanical Engineering Dept., R.I.E.I.T., Railmajra, Dist. Nawanshahr-144553, Punjab, IN
2 Mechanical & Production Engineering Dept., G.N.D.E.C, Ludhiana-141006, Punjab, IN

Abstract

In submerged arc welding (SAW), selection of appropriate values of process variables is essential in order to control heat-affected zone (HAZ) dimensions and to get the required bead size and quality. Also, conditions must be selected that will ensure a predictable and reproducible weld bead, which is critical for obtaining high quality. In this investigation, mathematical models were developed to study the effects of process variables and heat input on various metallurgical aspects, namely, the widths of the HAZ, weld interface, grain growth and grain refinement regions of the HAZ. The color metallographic technique and response surface methodology were used for analysis. Direct and interaction effects of the process variables and heat input on the characteristics of the HAZ were presented in graphical forms. The study revealed that heat input and wire feed rate have a positive effect, but welding speed has a negative effect on all HAZ characteristics; secondly width of grain growth and grain refinement zones increased and weld interface decreased with an increase in arc voltage; and width of HAZ is maximum (about 2.2 mm) when wire-feed rate and welding speed are at their minimum limits.

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Rajesh Kumar ¹, Rupinder Singh ²

Affiliations
1 Mechanical Engg. Dept., R.I.E.I.T., Railmajra, Distt. Nawanshahr-144553, Punjab, IN
2 Mechanical & Production Engg. Dept., G.N.D.E.C, Ludhiana-141006, Punjab, IN

Abstract

Micro-alloyed (MA) steels have matured during the past 40 years into an important class of high-strength structural materials. Their cost-effectiveness has been enhanced by the growth of steel making electric-arc-furnace (EAF) and the thin-slab-casting process. A recent project involving an ultra-light-steel auto body (ULSAB) concluded that high-strength-steels are the materials o f choice for the automotive industry. This study showed that replacing cheaper carbon steels with high-strength steels allowed automakers to reduce the weight of an auto body at the same or at potentially lower costs. The same economic principles can be applied to other applications. The strengthening effects of vanadium make microalloyed steels particularly suited for high-strength-steel applications. By effectively combining grain refinement and precipitation hardening, vanadium maximises the strengthening process and is compatible with current steel-processing technology. To dramatise the cost effectiveness o f these high-strength-steels in potentially new applications, a series of demonstration projects are needed involving the co-operation of steel producers, fabricators, and users. In many applications, the decision to replace plain-carbon steel with higher strength vanadium-bearing microalloyed steel can be shown to improve the profitability of both the steelmaker and the steel user.

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Rupinder Singh ¹, Jaimal Singh Khamba ²

Affiliations
1 Mechanical & Production Engineering Department, G.N.D.E.C, Ludhiana, IN
2 Mechanical Engineering Department, University College of Engineering, Punjabi University, Patiala, IN

Abstract

Ultrasonic Machining Process (USM) is a non-traditional machining technique, which is capable of providing excellent material removal rate along with surface finish on hard and brittle materials. Not much research work has hitherto been reported regarding machining characteristics of tough materials. The aim of this paper is to study the machining characteristics of tough materials with USM. The results of an experimental study conducted on titanium alloys using three different tool materials are reported. Surface roughness graphs have been obtained to gain insight in to the underlying wear pattern on the surface of titanium. The results suggest that toughness significantly affect the material removal rate in USM. Further, the composition of work material plays an important role in controlling the surface finish of the part.

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Amrinder Pal Singh ¹, Rupinder Singh ²

Affiliations
1 Deptt. of Mech. Engg., UIET, Panjab University, Chandigarh - 160014, IN
2 Deptt. of Mech. & Prod. Engg., G. N. D. E. C., Ludhiana -141006 (Pb.), IN

Abstract

Submerged Arc Welding (SAW) is a process in which the heat for welding is supplied by an arc (or arcs) developed between a bare metal (or electrodes) and a workpiece. In the present research paper investigation, variation of the mechanical properties by changing the welding parameters in submerged arc welding (SAW) process is highlighted and the probable reasons have been listed. The results help to understand that how each welding variable influences the mechanical properties of the welded specimen. The major welding variables identified are: welding current, welding arc voltage and welding speed. The effect of these welding variables have been seen on on various mechanical properties namely yield stress, ultimate tensile stress, percentage elongation, hardness, ductility and soundness of the weld by conducting tensile test, hardness test and guided bend test (face & ischolar_main) on square butt welded and v-groove welded specimen of the same thickness.

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Rupinder Singh ¹, Jaimal Singh Khamba ²

Affiliations
1 Deptt. of Mechanical & Production Engineering, G.N.D.E. College, Ludhiana (Punjab), IN
2 Deptt. of Mechanical Engineering, T.I.E.T., Patiala (Punjab), IN

Abstract

In Ultrasonic machining of titanium alloys, remarkable effect of slurry type, grit size and concentration have been observed. This paper reports the result of an experimental study conducted using conventional tool material Stainless Steel and High Speed Steel with Alumina slurry, on Titanium alloys. The objective is to compare the Material Removal Rate and Tool Wear Rate of two different Titanium alloys i.e. TITAN 15 (ASTM Gr2) and TITAN 31 (ASTM Gr5). Machining properties of these alloys are compared using Ultrasonic Drilling Machine with different power rating at fix slurry concentration of alumina so that results can be used in manufacturing industry.

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Rupinder Singh ¹, Jaimal Singh Khamba ²

Affiliations
1 Department of Mechanical & Production Engineering, Guru Nanak Dev Engineering College, Ludhiana-141006, Punjab, IN
2 Mechanical Engineering Department, Thapar Institute of Engineering & Technology, Patiala, Punjab, IN

Abstract

Ultrasonic Machining is a non-conventional Machining process in which high frequency Ultrasonic Vibrations are used to machine brittle materials, which are otherwise difficult to machine. This process involves erosion as material removal mechanism, so obviously works better on hard materials. A lot of experimental work has been done on tool preparation for ultrasonic machining process. Commercially tool for Ultrasonic machining process are produced using silver brazing process. This paper aims at study of tool manufacturing technique for Ultrasonic drilling machine (For reference purpose Titanium {15} sample are chosen with 1801 No. (L&T) Silver Brazing rod was used). The size of rod was 1.6 mm diameter and 25mm* 0.075 mm shim; Tensile strength 63 Kg/mm2 (90,000 Psi), bonding temperature 600°C.The other set up includes 500 watt Ultrasonic drilling machine, with boron carbide slurry of 320 grit size using 40% concentration at 25.7°C slurry temperature.

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Rupinder Singh ¹, Jaimal Singh Khamba ²

Affiliations
1 Dept. of Mechanical & Production Engineering, G.N.D.E.C, Ludhiana, IN
2 Dept. of Mechanical Engineering, T.I.E.T, Patiala, IN

Abstract

In Ultrasonic Machining process, a recirculating pump forces slurry of abrasive materials suspended in liquid medium, such as water between tool face and work piece. The abrasive particles propelled by the tool strike the work piece at 150000 times their own weight. These tiny abrasive particles chip off microscopic flakes and grind a counterpart of the tool face. This paper mainly aims at study the effect of silicon carbide slurry on machining properties of Titanium alloy (TITAN15) ASTM Gr2 using 500 Watt Sonic-Mill Ultrasonic Drilling Machine with different power ratings at fix slurry concentration and temperature to establish relation between Material removal rate and Tool wear rate so that result can be helpful for manufacturing industry.

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