Part of Lesson Plan: Running a bead with and without filler rod
Activity Overview / Details
After all notes and lecture are complete proceed to the shop and demonstrate to the students what you expect within the welding assignments. Before the actual demonstration you need to properly set up the shop or welding area so students may get a clear view of the welding demonstration. Set a welding shop (metal) table in the center of the shop floor. Have a couple of firebricks, a piece of 14 gauge sheet metal- cut at 1 1/2" X 4", a friction lighter, the oxy-fuel outfit, welding gloves, slip joint pliers and shade #5 welding glasses or goggles ready on the welding table. As the students arrive in the shop have them each put on a pair of shade #5 welding goggles / glasses and review the start up procedures for the unit. Set the regulators at 5 lbs acetylene and 5-8 lbs oxygen, light the torch and obtain a neutral flame. Set the metal on top of the firebrick, put on all safety gear and proceed into the demonstration. The teacher should have several pieces of metal and show the students a good bead, one that you blew through due to traveling too slow, bead with an oxidizing flame, a bead with an carburizing flame, a bead with the travel speed to quick, a bead with the tip too close to the molten puddle, tip to far from the molten puddle, work angle too great and work angle to straight, ect... show the students how to properly grab hot metal with the pliers and safely dunk it into the dunk tank (with gloves on!) pass around (after cooled) the examples of each weld demonstrated and be sure they see the one that you ran correctly. Have some discussion, ask questions and check for understanding. Hand out the welding assignment sheet titled Push a Puddle, have the students read the assignment sheet and check for understanding. Then let them proceed into the assignment on their own.