Clamping

Question 1

Clamp selection

Answer 1

Hold part against locators
Securely prevent vibration
Should not damage the part
Easy loading and unloading

Question 2

Clamping position

Answer 2

Should always contact work at its most rigid point

If there are two supports. Use two clamps otherwise part may bend the part

Question 3

Clamping force calc

Answer 3

= (cutting force (lbs) / static friction co-efficient) x safety factor (usually 2)

Question 4

Simplest clamping

Answer 4

Strap clamps - strap, heel support, fastner

Question 5

Fasteners

Answer 5

Studs,nuts,washers, knobs, cam handles,

Question 6

Screw clamps

Answer 6

Simplest
Least expensive
Low clamping speed

Question 7

Hook clamps

Answer 7

Variation of swing clamp

Question 8

Edge clamps

Answer 8

Pushes work forward as well as applies force downward

Question 9

CAM clamp

Answer 9

Chances of loosening due to vibration

Question 10

Direct and indirect pressure clamping

Answer 10

Direct clamps directly on work piece
Indirect clamps indirectly on work piece
Indirect clamping reduces work piece vibration

Question 11

Toggle clamps

Answer 11

High holding force to application force

Positive locking action

Can be applied in confined areas

Question 12

Toggle clamps four actions

Answer 12

Hold down
Push / pull
Latch action
Squeeze action

Question 13

Vaccumag plate

Answer 13

Combo of Vaccum chuck and magnetic chuck

Vacuum plate mounted on top of magnetic plate

Question 14

General clamping principles

Answer 14

Hold work pieces against locators
Must prevent movement of work piece
Not designed to take primary cutting forces