MULTI-PURPOSE USE FOR BENDING SECTIONS |
For forming Arches , Rings , Spirals , Coils of Bends R > 5 x on Tube , Pipe , Angle , T, Round Square , Flats , Channel , Extrusion
MULTI-PURPOSE USE FOR BENDING SECTIONS
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Work piece is clamped to stationary bending former , pressure tool moves wipes work piece around the former .
- Bends tubes DF <5.5,CLR> 3-6.5”
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Bends in solids ,squares , rounds , flats , rectangles in easy plane possible to smaller radii then tubing
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Ductility of material , tool strength decides smallest radius
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Forming roller method
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Follow block method
- The pressure tool is a shoe-type bar of length 3.5 times bend length
- For bends, C.L.R. < 4x Tube O.D.
- For small tube swivel clamp block is used
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| EDGE BENDING OF FLATS , ANGLES , CHANNELS |
- For hard way bends , R > 3-4 x material with
- This allows for expansion – contraction of material
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Channel , angle , special section can be formed edge wise by tools designed to internally support or confine side walls by segmented tools or by filling with sand during forming . This reduces twisting , helps release parts after bending , Improves tool life
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Eye Bends- In /Off Center
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Dia . of eye set by varying radius pins or collar
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Marking reduced by lubricating the grove
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Flattening on inside reduced by grooving the pin
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Smallest radius depends on ductility , tool strength
Springs , Loops , Coils
Number of turns of spring , coil limited by height of forming nose and radius pin
U/Zero Radius Bend
Zero radius bends , U- bends can be bend from files , rounds , squares of ductile materials
Scrolls
- Formed by collar of required shop
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