Quality of welds produced by submerged arc welding, Mechanical Engineering

a) You have been assigned to design a robotics spot welding experiment for low carbon steel sheets. You found an experimental power source for spot welding process which is designed to deliver current as a ramp function of time: I = 100,000 t, where I = amp and t = sec. At the end of the power-on time, the current is stopped abruptly. You have decided to use this power source for you experiment. The sheet metal being spot welded is found to have unit melting energy = 10 J/mm3 and resistance R = 85 micro-ohms. The desired weld nugget size is: diameter = 4 mm and thickness = 2 mm (assume a disc-shaped nugget). You assumed that 25% of the energy generated from the power source will be used to form the weld nugget. In order to set up the process, it is required to determine the power-on time the current must be applied in order to perform this spot welding operation. What is the power-on time?

b) Why is the quality of welds produced by submerged arc welding very good?

c) Which materials can be friction stir welded, and which cannot? Explain your answer.

 

d) List the joining methods that would be suitable for a joint that will encounter high stresses and will need to be disassembled several times during the product life, and rank the methods.

Posted Date: 2/21/2013 5:07:43 AM | Location : United States







Related Discussions:- Quality of welds produced by submerged arc welding, Assignment Help, Ask Question on Quality of welds produced by submerged arc welding, Get Answer, Expert's Help, Quality of welds produced by submerged arc welding Discussions

Write discussion on Quality of welds produced by submerged arc welding
Your posts are moderated
Related Questions

Computer Algorithm For On-Line Scheduling For Automated Manufacturing Systems  Introduction Now days  market  is  characterized  via  the  production  of  minute  batch

Fatigue crack propagation: If it is assumed that no plastic deformation occurs around crack tip and law of fatigue crack propagation for place of above Example is da/dN =  10

Explain the process of a Pneumatic Proportional Controller and get its transfer function. What modification is needed to make it function as a proportional plus derivative controll

Heat Treating Equipment: The major equipment for heat treatment is furnace. There are two main categories of furnaces - batch and continuous. The furnace selection needs cons

Derive and solve a model of an insulated water tank with a changing level (i.e., changing tank volume). There is only one in ow stream with a flow rate of 1 kg/sec for t The

Estimate the Weight of the Casting A Yoke casting shown in Figure is to be produced by sand casting process. Estimate the weight of the casting if the density of the material

define prandtl''s stress function

basic idea in designing of aircraft ejection seat