- Special Tools Guide
- R-Bend Counter Type
R-Bend Counter Type
SPCC : 0.6 - 2.3mm SUS : 0.6 - 2.0mm
This application is suitable for larger R bending. The counter part in the die bottom controls rapid bending and work for prevention of multiple-breakage. Also this tool has versatility because only punch is replaced for required radius.
Work Sample | Work Profile | Tool Image |
---|---|---|
Tool Spec.
Mat. | SPCC, SUS, AL |
---|---|
Thickness mm | 0.6 - 2.3 |
Angle | 70° more |
Outer radius mm | R5 - R50 |
Required Tonnage
unit kN/mThickness mm | 0.6 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.3 |
---|---|---|---|---|---|---|---|
Required Ton kN/m | 20 | 30 | 50 | 70 | 130 | 200 | 270 |
Necessary Tonnage Calculation
SPCC | Tonnage /m above x1.0 x product length(mm)÷1000 |
---|---|
SUS | Tonnage /m above x1.5 x product length(mm)÷1000 |
AL | Tonnage /m above x0.6 x product length(mm)÷1000 |
Cautions
Marring
Marring appears if the work is not covered by protective sheet. Therefore the marring countermeasure has to be taken by such as urethane sheet and mark-free tape.
Side Marring
Check Machine Capacity
Be sure that required tonnage gained by equation above does not exceed the machine capacity.
Selection judgment
Guide line : If product inner radius ÷ thickness t becomes bigger than 30, Counter-Type can be recommended.
Example) Product inner radius 30mm and thickness t 1.2mm
30÷1.2 = 25
Therefore Air-bend type or General type is recommended.
Product Accuracy
Accuracy of product R dimension R± 5%. Example: Product R=30 mm. 30x0.05 =1.5 Therefore R30±1.5mm.