disortion control

Question 1

What does a jig ensure?

Answer 1

Accuracy, uniformity, and cost efficiency during production

Question 2

What does the use of rounded corners prevent?

Answer 2

Notching effects and stress concentration

Question 3

What is the principle involved in stagger welding?

Answer 3

Alternating welds on each side of the joint to balance stresses

Question 4

What distortion occurs along the weld’s length?

Answer 4

Longitudinal distortion

Question 5

What’s one guideline when choosing tack weld frequency?

Answer 5

Thinner material and narrow joints need more tack welds

Question 6

Where is transverse distortion found?

Answer 6

Across the weld, at right angles to the joint

Question 7

Shrinkage from heat in welds causes what?

Answer 7

Stress and distortion

Question 8

To maximize strength and reduce welds, what can be used?

Answer 8

Rolled or formed sections like beams or tubing

Question 9

Longitudinal distortion refers to what?

Answer 9

Shrinkage or warping along the weld’s length

Question 10

Where is angular distortion most prominent?

Answer 10

Tee joints and single-sided butt joints

Question 11

Why determine if preset is required?

Answer 11

To ensure parts align properly after cooling

Question 12

Transverse distortion refers to what?

Answer 12

Dimensional change across the joint or plate

Question 13

What is rigid clamping and fixturing?

Answer 13

Holding weldments in place to resist distortion

Question 14

What is residual stress?

Answer 14

Built-up internal stress in the weld or base metal

Question 15

How does pre-bending differ from pre-setting?

Answer 15

Pre-bending uses clamps; pre-setting offsets parts before welding

Question 16

How does skip welding reduce distortion?

Answer 16

By spreading heat evenly in short, spaced welds

Question 17

What are two design methods to control distortion?

Answer 17

Working around the neutral axis and presetting joints

Question 18

What does pre-setting allow for?

Answer 18

Compensating for expected shrinkage or pull

Question 19

Transverse and longitudinal distortions are classed as what?

Answer 19

Dimensional distortions

Question 20

What is sub-assembly?

Answer 20

Dividing large weldments into smaller sections for control

Question 21

Local preheating can alleviate what?

Answer 21

Shrinkage and stress buildup

Question 22

When balancing weld pull, what are you doing?

Answer 22

Planning weld sequence for equal stress distribution