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29 Cards in this Set
- Front
- Back
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Most common forming method |
Air bending |
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Points of contact when air bending |
3 point |
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Final inside bend radius when air bending determined by |
V-die |
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20% rule |
Width of die opening x 20% equals bend radius. (2" die x .20 = .4" bend radius) |
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Outside setback of bend |
Distance between tangent point of radius and apex if bend |
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-------◇----------◇--------- |
Brake line |
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8x die rule applies to material up to |
3/8" |
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Die opening rule for material over 1/2" |
10x |
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When radius is less than 63% of material thickness, bend is considered |
Sharp |
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Any holes within outside setback will |
Distort |
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Light gauge metal formed with |
Leaf brakes, pan brakes, box brakes |
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Press capacity base on |
Bending mild steel over 8x die |
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"K" in K factor represents |
Neutral axis |
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Minimum bend radius determines |
Limit of bending before material splitting occurs |
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Coining used on material thicknesses of |
12 gauge or thinner |
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2 factors for tonnage requirements |
Material type and thickness |
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Press has more tonnage for a lower cost |
Hydraulic press |
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4 factors to determine capacity |
Length of workpiece, thickness of Material, type and grade of Material, sharpness of bend |
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Bending type faster and more accurate |
Bottom bending |
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Bending type better for light gauge production, not suitable for heavy material |
Bottom bending |
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Die has 90° angle |
Bottom bending die |
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Die has 85° angle |
Air bending die |
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Bend allowance determined by |
Type and grade of Material, thickness of Material, width of die opening, radius of upper die |
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A sweep to check bends |
Bend set |
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Bend radius is equal to |
Material thickness |
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Press brake capacity base on |
Bending mild steel over 8x die opening |
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Inside radius is what % of die opening |
15% |
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Uses excessive amount of tonnage to place punch tip into and last the neutral axis of the bend |
Coining |
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What is a sharp bend |
Inside radius is less than 63% of the material thickness |
