Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
WELD PREPARATION: Joint Tolerance & Cleaning
Joint Tolerance
The allowable tolerance of joint dimensions depends upon whether the welding is to be done manually or by mechanised means. Manual welding applications can tolerate greater irregularities in joint fit up than mechanised welding. The particulartolerance of a given application can be determined only by actual testing, and this tolerance should be specified for future work.
Cleaning
Cleanliness of both the weld joint areas and the filler metal is an important consideration when welding with the gas tungsten arc process. Oil, marking crayon,grease, shop dirt, paint, & rust or corrosion deposits all must be removed from the joint edges and metal surfaces, to a distance beyond the heat affected area. Their presence during welding might lead toarc instability and contaminated welds containing pores, cracks and inclusions. Cleaning may be accomplished by mechanical means, by the use of vapour or liquid cleaners, or by a combination of these. Organic solvents like carbon tetrachloride should not be used as any trace of it coming under the arc may lead to the formation of phosgene, a toxic gas. Acetone may be used.
A Perspex tank ure 1), which has parallel sides for the top part of its height and a 'V' shaped section for the bottom part and a constant width throughout, is used as a receptacle
Split the harmonic motion x=10 sin (wt + 30 0 ) into two harmonic motions one having a phase angle of zero and the other of 45 0 . Describe and derive an expression for energy m
Define the Ideal Surface Roughness The ideal surface roughness represents the best possible finish which may be obtained for a given tool shape and can only be approached if bu
1. The three freight cars are rolling along the horizontal track with the velocities shown in the Figure. After the impacts occur the three cars become coupled together and move wi
Explain the Application of Electro Chemical Machining? 1. EBM has been used to perforate holes in glass fiber spinning head made from a heat resistant supper alloy. 2. Slott
(a) Derive a mathematical expression to determine the efficiency of Bell Coleman Cycle. (b) A dense air refrigeration cycle acts between pressures of 4 bar and 16 bar. The air t
Advantages of work energy principle over D''alambert''s principal.Explain in detail
Compare Petrol engine with Diesel engine with each other ( i ) Basic cycle: Petrol Engine work on Otto cycle whereas Diesel Engine work on diesel cycles. ( i i )
LOCOMOTIVE BOILER: It is horizontal, natural circulation, fire tube boiler. It can generate steam at the rate of 7000 kg/hr. at pressure of up to 2.5 Mpa. Earlier it was us
Polyhedra and Euler's Formula The b-rep of a polyhedra that are holomorphic to a sphere are topologically valid if they satisfy the following equations : F - E + V - L = 2 (
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd