No abstract

Today rider needs more comfort while driving the vehicle because of the increase in the living standards. In the rainy season when someone needs to be at some other place and that too in the heavy traffic, it becomes hard to deal with such situation. In order to cope up with this situation the concept of a retractable roof for the two-wheeler is proposed. A retractable roof is basically provided to mount on a 2 wheeler Activa. The roof is made up of a flexible waterproof canopy which is supported by a tubular metal frame structure secured to the Activa. Before actual manufacturing of the structure, CFD analysis needs to be done to decide the inclination of links and to analyses the structure of roof under drag. The retractable roof is made up of links. Each link is made up of three pieces. The ends to be pivoted were pressed up to 15 cm, as all the five links should be pivoted together otherwise the ends would have created problems while folding and unfolding of the structure. Every link consists of three pieces was joined at two points in required angle.

Welding is a process of joining similar metals by the application of heat. Welding can be done with or without the application of pressure. While welding, the edges of metal pieces are either melted or brought to plastic condition. Welding can be done with the addition of filler materials or without it welding is used for making permanent joints. It is used in the manufacture of automobile bodies, aircraft frames, railways wagons, machine frames, structural work, tanks, furniture, boilers, general repair work and ship building. At most in all metal working industries welding is used. In this project we are making portable spot welding machine , which will be easy carry and will be used in many filed.