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Construction Of Welding Machine
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2.1.3 SOLDERING
Is a joining process that is similar to brazing except that it is performed at much lower temperature than brazing. This soldering is the process of joining two work pieces together with a filler metal, such that only the filler metal undergoes melting i.e the work piece does not under goes any melting. Soldering materials melts at less than 450common soldering material include tin-lead, tin-zinc, lead-zinc, lead-silver. Soldering also employs flux materials to clean the surface to be soldered and improved metallurgical bonding residues from fluxes, however must be removed after soldering to reduced the risk of the occurrence of corrosion.
2.1.4 BRAZING
Brazing is a similar process to soldering except that the filler used works much more like an adhesive. Where in only this filler metal undergoes melting i.e the work piece do not experience any melting , the temperature at which brazing is done must therefore be high enough to melt the filler materials but not the work pieces. Materials used as filler for brazing are those that melt above 450c. flux is also used during brazing for the purpose of eliminating oxide films from the surface of the work pieces and preventing oxidation. This would ensure a good metallurgical bond between the work pieces and the filler on the brazing process is completed.
3 OTHER METHOD: The brazing material fill up the space between the surface being formed, and even manages to get into tight spaces by capillary action. A strong material has cooled down. In semi conductor industrial a common application of brazing is in the attachment of leads to certain ceramic packages (such as side-brazed packages). To allow brazing of metal features to a ceramic package, the making surface of the package must first be coated with a thin film of refectory metal e.g molybdenum tantalum e.t.c.
In the former listed alternative to welding the choice of alternatives for this project is an A.C ARCWELDING MACHINE.
It is the choice because of its tremendous importance on the economy and the advancement in mechanical engineering construction and fabricating industry. It has also promoted the mechanization and automation in the industries and this is why the ARC WELDING MACHINE is chosen to be fabricated.
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT COMING SOON ... Continue reading---
CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONE1.0 INTRODUCTIONIn the past with the necessary of metals it always seems impossible to join two metals together with grooving riveting, this idea leads to alternative of finding a lasting solution to the problem. This brought about the idea of a welding machine with a well laminated core and coil wound together to form a high rated transformer which is immersed in a can of oil.Welding is the most economical and efficient way to join metals permanently. It is the only way of join ... Continue reading---
CHAPTER THREE - [ Total Page(s): 4 ]CHAPTER THREE3.0 GENERAL DESCRIPTION AND ITS WORKING PRINCIPLERegarding the design and fabrication of this project several information were gathered through consultation of previous journals text books and internet.Definition: “welding is the process of joining together two pieces of metal so that bonding take place at their original boundary surface s. when two parts to be joined are melted together, heat or pressure or both is applied and with or without added metal for formation o ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 4 ]Where;K = constant (Boltzman constant in joules / kelvin)A= 200m x 4 = 800mmT2 = 3500CT1 = 3150CX = 50mmQ = k x 800mm 350 – 3150C 50mm Where K =8.617 x 10-5 J/kQ = 8.673 x 10-5 x 800mm (135 50mmQ =62044.46 J/K 4.1 WINDING DESIGNThe
basic of winding is to have number of turns being wounded around an
appropriate point of the core. Winding design in transformer
construction must be done perfectly and accura ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 10 ]Now let assume a load having a power factor such that the secondary current is in phase with E2 the primary current must now have two component.1. I1 to maintain the useful flux2. I2 to neutralize the demagnetizing effect of the secondary current.Since the flux of each limb is link only with the winding by which it is produced, it is referred to as leakage flux and its responsible for reducing an e.m.f. of self inductance in the winding with which it is linked. The reluctance o ... Continue reading---
CHAPTER SIX - [ Total Page(s): 1 ]CHAPTER SIX6.0. CONCLUSION AND RECOMMENDATION6.1 CONCLUSION The project is a form of providing student with appreciable skills p4actically designed to expose or equip them with real working operation of machine and how they are being constructed and a better understanding of one’s own career goals and for the progress of the nation.The project seemed easy and simple but later on turn to be useful and interesting project for Engineering students. With all the proble ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESFlood CR (1981) “Fabrication of welding and joining process†1st Edition, Butterworth and Co publisher limited London, P.P 21 – 25, 28 36- 37 and 39.Google: http://weldguru.com/welding-flamesFlood CR and parkin N. (1974) “craft practice “ 1st Edition pergamon press limited, New YorkDavies A.C (1984) “Welding science and technology†8th edition Cambridge Universities press. London Pg-42B.L. and A.K.Therage (1994 Textbook of Electri ... Continue reading---
