Rolling Radius On Sheet Metal Edge

For ordinary low carbon steel plates rust proof aluminum plates brass plates copper plates etc the inner radius 0 2 is no problem.

Rolling radius on sheet metal edge.

Figure 1 1 shows that the length of the edge before the roll a is the same as the outermost area of the roll b and as the inner most part of the roll c. Therefore the bending inner radius of our sheet metal parts is basically 0 2. Sheet metal locking crimpers. Sharp inside bend radius in sheetmetal parts can cause material flow problems in soft material and fracturing in hard material.

Good and accurate rounding of steel constructions according to en 1090 iso 12944 iso 8501 or imo pspc is becoming more and more important in the metal working industry. Leaving a radius on the other hand relieves this danger. Still some advice applies. Of jamey jordan series 5 8 inch radius rolls allows you to make a full 90 degree radius bend on the edge of sheet metal.

The smaller radius is formed first to allow the material to finish inside itself. Create a raised edge in sheet metal that locks into the rolled edge of another piece. Rounding edges with minium radius 2 mm is a necessity for good adhesion of coating or paint to protect against corrosion. This is because the metal is simply being bent on one plane.

The desired radius is created by step bending a progressively larger radius into the sheet beginning with the desired curl radius minus the material thickness and ending with the desired curl radius. If you want to strengthen the edges of your metal sheet hemming is a great option. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. Completely crushing the radius needs great power and tonnage.

It is better to leave a small radius inside the hem. Jamey jordan radius roll set 5 8 inch radius. But for harder materials e g. Visualize if you will rolling the edge of a piece of paper.

Recommended inside bend radius for sheet metal parts should be equal to material thickness. Also it puts the material in danger of cracking.