- Special Tools Guide
- R-Bend General Type
R-Bend General Type
SPCC : 0.6 - 2.3mm SUS : 0.6 - 2.0mm
This application can gain stable accuracy because the punch presses the work into the die bottom. And R-Bend can be performed even if radius area has notching or holes internally. But this tool has no versatility because each tool is dedicated to required product radius and material thickness.
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 | 50 | 90 | 150 | 210 | 370 | 580 | 760 |
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 |
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 : Product inner radius ÷ thickness t ≤30 by general type
Example) Product inner radius 35mm thickness t 1.2mm
35÷1.2 = 29.16
No multi-breakage occurs because factor is less than 30.
Product Accuracy
Accuracy of product R dimension R± 5%
Example: Product R=30 mm
30x0.05 =1.5 Therefore R30±1.5mm