Lots of people across the globe are suffering from disabilities either temporary or permanent, and many of them are having difficulty in walking. That is why the role of the wheelchair is important for all having physical disabilities where they cannot walk by self. To address this issue wheelchairs are available in market with following benefits (i) easy transportation, (ii) compact storage space. This study is to propose a design of detachable folding mechanism that can mount on the frame of standard size wheelchair and can be dismounted to replace if any break down or maintenance. The mechanism can be mounted on standard wheelchairs and safe up to 150 kg weight of the subject.

Titanium is as strong as steel with less density. Therefore, titanium and its alloys are used in several engineering applications. The primary benefits of using titanium alloys in the production of high-performance components include their light weight, superior tensile strength and exceptional corrosion resistance. Titanium alloys have the capacity to keep their characteristics even at high temperatures. Because of their low density and capacity to withstand temperature extremes, these alloys are mostly utilised in airplanes, spacecraft and missiles. Many of the initiatives to save costs in the production of titanium components are based on additive manufacturing. This study aims to provide preliminary insight into the microstructural and mechanical behaviour of commercially pure grade-2 titanium (CP-Gr-2-Ti) structured wall fabricated by gas tungsten arc welding assisted layer-by-layer manufacturing (GTAW-assisted-LM). Ideal process variables were selected through the trial-and-error method. The vacuum chamber was used during fabrication to ensure that the wall was free of contamination. The anisotropy in the LM processed wall is studied with different orientations of tensile samples. The variation in the microstructure observed in LM processed wall was due to varying complex thermal cycles. The phase texture and grain nature of the wall was studied using pole figures and inverse pole figures. The LM-processed wall exhibits better mechanical properties compared to wrought alloys. The fractography revealed several morphologies indicating that the fractured samples were ductile. Hence, a piece of first-hand information and experience is gained in this research work.

No abstract

To maintain the high RH value near dry air vent, increase the efficiency of Peltier with proper ventilation that is to make the heat escape easily, to provide more surface area for heat sink to cool down the air more effectively. Mass of the body is reduced, and durability is improved. RH value is maintained with the help of dry air vent. We can get benefits from a liquid cooled micro channeled heat sink which needs only a little space. It is suitable for the high flux heat dissipation and also gives a better result compared to generic convection method. It is used without reacting with the body frame. It is portable with help of 12V DC solar 10W. This system solves water scarcity in rural areas. We can especially use at hill stations as the humid conditions are the best.

Six Sigma is a methodology containing various tools and techniques to make improvement in a process. The purpose of this research is to reduce the defects, maximize the profit, and make small scale industries more efficient. This Six Sigma Project was conducted at a valve manufacturing industry located in Maharashtra. The industry was performing at Sigma Level 3.0 and the newly achieved Sigma Level is 3.5. It is predicted that if the solutions are continuously applied for 6 months then the industry can achieve Sigma Level up to 4.0. A control plan was also provided to the industry which will help them to keep implementing the solutions for a longer period of time. A lot of energy and material wastage is prevented by reducing the defects which is a huge benefit for the environment in the long run.