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34 Cards in this Set
- Front
- Back
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What are the five basic joint types? |
-Butt
-corner -tee -edge -lap (BCTEL) 120102e pg 2 |
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What are the four weld types?
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-surfacing
-plug or slot -fillet -groove 120102e pg 3 |
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What is surface welding?
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when a bead or beads are used in place a layer of weld metal over a surface
120102e pg 3 |
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What is surface welding used for?
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-Reclaim worn surfaces
-Place a layer of cladding 120102e pg 120102e pg 3 |
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What are the two steps for surface welding?
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1.Layer of softer less expensive weld metal returns metal to original thickness
2.Layer of hard surface material is applied to promote durability and extend part’s service life 120102e pg 3 |
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What joint are plug or slot welds commonly used with?
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lap joints
120102e pg 4 |
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What joints are fillet welds found on?
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lap, Tee and corner joints
120102e pg 4 |
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What is the size of a fillet weld determined by?
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the largest equal leg triangle that may be drawn within the cross section of the weld
120102e pg 5 |
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What is a fillet welds strength determined by?
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it’s effective throat dimension |
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What can excessive convexity lead to on a fillet weld?
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tends to produce a notch effect
120102e pg 5 |
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What can over welding a joint with a fillet weld lead to?
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increased distortion
120102e pg 5 |
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What is the size of an unequal leg fillet weld determined by?
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it’s shortest leg |
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What are the 4 variations of fillet welds?
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-continuous |
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The length and centre to centre distance of fillet welds is called what?
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Pitch
120102e pg 7 |
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What joint types are groove welds commonly used with?
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butt joints
120102e pg 8 |
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What is the size of a groove weld determined by?
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The throat size |
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Name two factors you use to determine what type of groove weld to use on a joint?
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-intended service |
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What are square groove welds generally restricted to due to limited penetration?
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Thin gauge material
120102e pg 9 |
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Where is the bevel groove used most often?
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Where you only have access to one member of the joint or where the joint is set in the horizontal position |
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What is the most widely used groove joint for materials 9.6mm(3/8”) to 25.4(1”) thickness?
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Vee Grove
120102e pg 10 |
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What is the advantage of a U-groove weld over a Vee groove?
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smaller included angle which requires less filler metal
120102e pg 11 |
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What advantage does a J groove weld have over a bevel groove?
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J groove affords better access for welding, which promotes good penetration and fusion to the bottom of the joint
120102e pg 12 |
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What is a corner joint used mainly on?
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sheet metal fabrications
120102e pg 14 |
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To make a corner joint stronger what can you add to the inside of the joint?
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a fillet weld
120102e pg 14 |
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What is an edge joint used extensively to do?
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join light gauge sheet metal |
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What advantages does edge joining light gauge sheet metal give you?
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-less danger of burn through |
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What is the disadvantage of edge joints?
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Cannot withstand dynamic loads
120102e pg 15 |
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How are thin gauge material edge joints generally welded?
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autogenously(without the need for additional filler metals)
120102e pg 15 |
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What weld are Tee joints generally joined with?
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fillet welds
120102e pg 15 |
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What is the lap joint highly successful at joining?
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Metals of different sizes
120102e pg 16 |
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Why are Lap joints preferred for soldering, brazing and braze welding operations?
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Total joining surface area is greater than that of the butt joint
120102e pg 16 |
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Where maximum strength joint is needed what joint is used?
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The butt joint
120102e pg 17 |
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In the two digit code 1G what does the |
a)the position
b)the weld type 120102e pg 17 |
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What are the primary considerations in deciding what joint and weld type to use?
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strength requirements and load conditions |
