Manufacturing Technology Today

Ravi Anant Kishore ¹, Ravi Tiwari ¹, Amrinder Pal Singh ², Inderdeep Singh ¹

Affiliations
1 Dept. of Mech. & Indl. Engg., Indian Institute of Technology, Roorkee, IN
2 Dept. of Mech. Engg., UIET, Panjab University, Chandigarh, IN

Abstract

Drilling of Fibre Reinforced Plastics (FRPs) is important to facilitate the assembly operations for geometrically intricate composite products manufactured in parts. The drilling induced damage often results in high rate of rejection and affects the long-term performance of the product with a drilled hole. The aim of the study is to develop a knowledge based tool that could provide a common platform for information regarding damage free drilling of FRP laminates. The code of the program, has been written in Developer C ++. The code developed as a part of this study saves valuable time of the researchers and scientists by providing a common platform for retrieving information regarding the drilling of FRP laminates. The code may further be designed into web-based software that can be used by the engineers and scientists worldwide.

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Amrinder Pal Singh ¹, Manu Sharma ¹, Inderdeep Singh ²

Affiliations
1 Dept. of Mechanical Engg., UIET, Panjab University, Chandigarh, IN
2 Dept. of Mechanical and Industrial Engg., Indian Institute of Technology, Roorkee, IN

Abstract

This paper presents comprehensive and exhaustive review of research done in drilling of fibre reinforced plastic composites. Decades of research shows that by keeping the thrust force below a critical value the drilling induced damage can be prevented. Researchers have played with feed rate and tool geometry (point angle, helix angle, and chisel edge angle) so as to keep thrust force below the critical limit. Lately, researchers have tried to devise intelligent drilling process in which feed rate is continuously manipulated such that thrust force is always kept in the safe limit that is below critical value. This paper further represents some important directions for minimal drilling induced damage. Gaps in research, where more effort needs to be put in, are also identified towards the end of the paper.

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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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