Spot Welding Essay

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• What is means of welding?
The welding is the processes which make the permanent bonding between the two or more solid bodies o the metal if the welding is not done properly the welding joint can be brake from the welding place and if the welding is done properly the metal can be brake from the middle or the center of the object

• Spot welding http://www.taylorautobody.com/Portals/16/images/Pro%20Spot%202.jpg There is many type of welding processes 1 Gas welding 2 Gas shielded arc welding 3 Arc welding 4 Leaser welding and 5 Sport welding Spot welding is one type of welding processes this processes is mainly use in automobile industries and any other industry this make the hole or sport on the two or many material sheet of metal This is making the welding process very easy and the perfect from of the manual process • Application of spot welding http://www.chinadaily.com.cn/cndy/attachement/jpg/site1/20120524/00221917e13e1127c5220d.jpg Spot welding is typically used when welding particular types of sheet metal welded wire mesh or wire mesh thicker stock is more difficult to spot welding because the heat flows into the surrounding metal more easily spot welding can be easily identified on many sheet metal goods this requires larger or more powerful and more expensive welding transformers the most common application of spot welding is in the automobile manufacturing industry or to the where it is used almost universally to welding the sheet metal to form a car Spot welder can also be completely automated and many of the industrial robots found on assembly lines are spot welder which is run by the automatic sensor • Processing of spot welding Spot welding involves three stages the first of which involves the electrodes being brought to the surface of the metal which is applying a slight amount of pressure to the metal he current from the electrodes is then applied after which the current is remove but the electrodes remain in place for the material to cool down welding times range is from 0.01 sec to 0.63 sec depending on to the thickness of the metal the electrode force and the diameter of the electrodes themselves the two materials being welded together is called the work pieces and must conduct the electricity the width of the work pieces is limited by the throat length of the welding apparatus which ranges typically from 5 to 50 inches 13 to 130 cm work piece thickness can range from 0.008 to 1.25 inches 0.20 to 32 mm.
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• Effect of spot welding http://www.twi-global.com/EasysiteWeb/getresource.axd?AssetID=15378&type=full&servicetype=Inline The spot welding process is hardening the materials causing it to warp this metal reduce the material fatigue strength which can may stretch the material as well as anneals it the physical effects of spot welding include the internal cracking to the surface cracks and bad appearance to the material the chemical properties affected which is include the metals internal resistance and its corrosive properties to the material

• Mini spot welding: http://2.imimg.com/data2/HL/TT/MY-2295925/spot-and-projection-welder--250x250.jpg The mini spot welding is the similar to the spot welding process where it is mainly use in the smaller industry where it has similar working to the sport welding in this the machine of the spot welding is to smaller in the size but the working and the application of the both machine is same this mini spot machine is used in service center where it is use for the damage car which is easy to operate the machine this machine can be operate by any one of the technical worker who is familiar with the machine this machine can be used in narrow place and it is light in weight and can move it from one place to the another place Task no 2: Produce a list of consumables that are required for electric arc welding process. • Electric arc welding process: http://image.cccme.org.cn/buo_en_supply/2010/1/4/1714368054089_1714368054089.jpg Arc welding is a type of welding that uses to do the welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point they can use either direct current DC or alternating current AC current and consumable electrodes are use for the welding process the

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