1. Special Tools Guide
  2. 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
R-Bend Counter Type R-Bend Counter Type 2 R-Bend Counter Type Tool

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.

MarringSide 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.

 

Special Tools Guide