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/m

Thickness  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.