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/m

Thickness  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