iRubric: MIG Welding Rubric

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MIG Welding Rubric MIG Welding Rubric Students will use MIG welding techniques to weld a variety of weld joints Rubric Code: T688AC By dwmdwm Ready to use Public Rubric Subject: Vocational Type: Project Grade Levels: 9-12

Welding Joints
	P1 4 pts	P2 3 pts	P3 2 pts	P4 1 pts
Weld width and height: 100 % Uniform width and thickness throughout the entire length of each weld.	P1 Bead is uniform width all along the length of each welld. Has a smooth appearance	P2 Bead maintains width and length. Shows some small blemishes along the weld	P3 Not a uniform thickness through out the weld. Thickness goes to extremes	P4 Weld is cut off in places, not uniform along the weld. Shows bare spots
Appearance 100 % Smooth with uniform dense ripples, doesn’t show the bead traveling to fast or slow	P1 Weld shows a constant speed and uniformity the entire length	P2 Weld shows a constant speed with some blemishes that are minimal	P3 Weld shows definite areas of speeding up and slowing down. Ripples tend to be coarse	P4 Weld has been done to fast or to slow. Weld is not complete
Face of bead: 100 % Convex, free of voids and high spots, shows uniformity throughout the bead	P1 Has a nice rounded look. Is not overly high, or low. Bead covers a wide area of each weld.	P2 Bead is well rounded, mostly uniform over the length of the weld. Shows some high spots and low spots	P3 Bead shows many high and low area's. Total lack of uniformity throughout the weld	P4 Weld does not blend into one single bead.
Edge of bead 100 % Good fusion, no overlapping or undercutting	P1 Sides and edges are smooth blending into each weld. Undercutting is kept to a minimum, Weld does not float on surface	P2 Moderately smooth blending. Undercutting and float are present. Stength of the weld is still strong	P3 Float and undercut are very apartent. Weld lacks strength and flow	P4 Metal is burned through. Weld has no connection to metal,
Beginning and ending full size 100 % Crater well filled	P1 End of each weld is complete, the line doesn't taper off	P2 Weld ending is full but shows some tapering and a craterpresent	P3 Crater distinctly present at the end of the bead.	P4 Metal is burned through at the end
Surrounding Plate 10 % Welding surface free of spatter	P1 Spatter is kept to a minuimum.	P2 Some spatter is present but not displeasing	P3 Spatter is in large amounts	P4 Spatter takes away from the integrity of the weld.
Penetration 100 % Complete without burn through	P1 Weld penetrates deep into the metal and adds strength and fusion to the edges and depth.	P2 Weld pentetrates deep but does not re surface through the bottom of a jointed welds	P3 Weld is uneven in depth, lacks uniformity along weld length.	P4 Weld floats on top of the metal. Has no strength
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