Danforth Technical School - Tech Tatler Yearbook (Toronto, Ontario Canada)

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- W- Y 1 Gerrard Square Display .Q rrafiliilkffxt Smiwol DANFORTH ,, 5- Illllllllllmuwmfl 'ETH f SEI

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Plasma Welding is the process was Vimy Idin by B. Lewis QllTSl In the world we have a Jcess of joining metal together. at process is called Welding. this essay we are going to ll of the wonders of a branch this process, Plasma welding. which a central core of extreme t is utilized and surrounded a sheath of cool gas. lThis to shield the core.l The heat the fusion is generated by electric arc. This arc has n highly intensified by the ection of a gas into the arc eam. The superheated column directed on metals it can e butt welds up to 1f2H or e in thickness in a single ss without filler rods or any ge preparation. Plasma welding is sometimes sidered an extension of the ventional gas tungsten arc lding. The main ference between these two cesses is,in plasma welding, air column is constricted. this constriction the higher t transfer is produced. A jet of high current nsity is what the arc plasma comes when the arc gas actually ts the metal and cuts or eyholesn through the piece and e cut is followed along the seam. the metal is cut, the molten tal flows around the arc column, en it is drawn together behind the le by what is known as Hsurface nsion forcesn and reforms in a ld bead. The torch is specially designed be hand held or mounted for .her applications. The process ' plasma welding is used to weld .ainless stell, carbon steels, Inel, Inconel, brass alloys, uminum and copper. A filler Id is not needed in this process It can be used on certain types of elds. iuipment A heavy duty D.C. rectifier a the source of power for this tocess. A special control console L needed to provide the necessary Jntrols. Proper cooling by a :ter pump prolongs the life of the lectrode and nozzle. Argon or helium is needed for ie gas supply. In some Jplications, argon is used as the lasma gas and helium as the shielding gas. But, in many of the operations,the argon gas is used for the shield and for the generation of the plasma arc. The plasma arc should be a part of our futures it should be like all other things safe to use and its use should become world-wide. most gruelling battles. Many of these battles they won at the cost of many hundreds of lives. At the close of the war 60,66l Canadians had been killed. Canada was matched on the home farmers and up with the s great military effort by her contribution front. Canadian manufacturers kept demand for food and Canada's Contribution to world War I by Chris Karanis CllTMlJ Canada played a decisive role in World war I both militarily and economically as we greatly affected the outcome of the war. within two months after declaring war,Canadian soldiers set sail for Britain. Not long afterwards two more divisions were added and the Canadian Corps were formed. By l9l8, 600,000 Canadians were in the army and 9,000 men in the navy. Even though Canada had no Air Force, Canadians made up to 223 of the Royal Air Force and l0 of its famous of top 27 aces. The most these men was Billy Bishop, a young man from Owen Sound who C0mDll9d 72 victories. Most of the Canadian units fought in the trenches of Northern France. These men were part withstood of the units that the first poison gas of the war. In this instance French troops turned and fled but the Canadians fought and filled the large gap in the front lines this prevented the Germans from breaking through to the English Channel. Until the end of the war, Canadian troops headed the assaults battle after battle. One of these well known battles Ridgea this battle was two months in planning and was the only battle successfully executed on the Western Front in l9l7. This all Canadian attack took place on Easter morning in the middle of a snowstorm. The well equipped Canadian forces took the Germans by surprise and the battle was a success. Although the Canadian forces were smaller compared to British, French or American, they earned a great reputation. For this reason they were sent into the metals. Because many countries were cut off from sending supplies to Europe, Canadian exports increased drastically as we attempted to help supply allied armies. Cheese exports increased 3002, pork 5352 and beef exports rose to 75,000,000 pounds annually or 6795Z. Canada's wheat also increased rapidly. The wheat had almost doubled and in a good year we would produce 450,000,000 bushels of wheat. The Canadian lumber industry also experienced a large boom during the war years. Along with exporting food Canadian industries had been turning out shells, TNT, acetone etc. Canada shipped 800,000 shells a month across the Atlantic. This fantastic pace was maintained and the Canadian economy was booming. By the close of the war Canada had supplied 60,000,000 shells during the war. with this we supplied shell forgings, propellants, explosives, aluminum, nickel, aircraft, ships, tanks and 430 miles of railway track that was shipped directly to France. By the end of the war Canadian government spent almost three billion dollars on the war effort. Much of this money was accumulated through the selling of victory bonds. In my opinion Canada played an important role in the war both militarily and economically as Canadian armies and supplies were a decisive factor to the outcome of the war.

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