Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
The term heat expresses: |
Quantity |
|
|
|
When heated evenly and without restraint, in which direction does metal expand? |
Volumetrically (all around) |
|
|
|
Transitional expansion occurs when a metal changes from: |
One crystalline to another |
|
|
|
Which type of distortion results from shrinkage across the weld that tends to pull a member of a Tee joint toward the welded side |
Angular |
|
|
|
Which type of distortion results in an overall reduction in the length of the weld |
Longitudinal |
|
|
|
Which type of distortion refers to the tendency (in butt joints) for the plates to draw together down the length of the joint as you are welding? |
Transverse |
|
|
|
What causes angular distortion in a Vee groove weld if the plates are free to move? |
Non-uniform contraction of the weld metal |
|
|
|
What is the primary cause of distortion created from longitudinal shrinkage? |
Weld beads contracting upon cooling |
|
|
|
How can you reduce longitudinal distortion? |
Keep weld reinforcement to a minimum |
Think of your 3G, the thing that’s above the plate is called... |
|
|
What is one method to reduce transverse distortion |
Use a fast deposition rate |
Burn off rate is the same as this |
|
|
What is one advantage of a jigging device? |
Maintains accuracy of the finished product |
|
|
|
Which fillet weld application produces the greatest amount of distortion? |
Multi pass fillet welds with a CONVEX profile |
|
|
|
What is one characteristic of a good welding design? |
Formed and rolled sections |
|
|
|
When several plates must be welded together with butt joints, what is the best weld sequence to control distortion |
Centre towards the outside in both direction |
|
|
|
What would happen if a piece of steel was heated evenly and then allowed to cool slowly back to room temperature? What is this referred to as? |
Free expansion and contracting or Volumetric expansion |
|
|
|
What are 3 types of distortion, give an example of each |
Angular- rotation around the weld line (warping) Longitudinal - parallel Transverse - perpendicular |
|
|
|
What are two ways to control distortion |
Mechanical Procedural/ design method |
|
|
|
What is a jig? And what are the advantages of using a jig? |
Fixture or device made for aligning and hold parts or components Advantages? - Accuracy of dimension -uniformity of product -Cost reduction by speeding up production |
|
|
|
How can you help to control the distortion on light gauge material? |
Put tacks closer, or use chill strip |
|
