Bending is one of the most common sheet metal fabrication operations.
Folding sheet metal edge to eliminate sharpness.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
Curls are most often used to remove a sharp untreated edge and make it safe for handling.
Hems are commonly used to hide imperfections and provide a generally safer edge.
These sections are located at the edges.
The edges may appear flat but shearing dies leave burrs.
Figure 3 a sheared sheet metal edge has several attributes that make it sharp.
Looking to dull edges on sheet metal for safer fabrication.
The type of.
As the groove in the point wears just move down the point to create a new groove and so on.
Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape.
Figure 2 57 making a grooved seam joint.
Hems are most often used to remove a sharp untreated edge and make it safe for handling.
This is done through the application of force on a workpiece.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
Sheet aluminium can be cut without the need for a guillotine or tin snips which tend to deform the metal.
Run the point over the other sides to break those sharp edges.
Many products use sheared sheet metal yet only one standard ul 1439 addresses the issue of sheet metal sharpness directly.
Secure the sheet metal to prevent slipping.
Edge bending operations are commonly used in industrial sheet metal processing and involve bending a section of the metal that is small relative to the part.
Curls come in two basic forms off center and on center rolls.
The force must exceed the material s yield strength to achieve a plastic deformation.
2 56 is often specified in the plans objects such as ice cube trays funnels garbage pails and other articles formed from sheet metal are fabricated with wire edges to strengthen and stiffen the jobs and to eliminate sharp edges the.
On center rolls will have the center of the roll in line with the plane of the sheet metal.
Step 2 use your die grinder with a mounted point we like shape w222 and simply run the point over the edge of the sheet metal.
Hemming is nothing but to fold the metal back on itself.
In sheet metal hems are used to create folds in sheet metal in order to stiffen edges and create an edge safe to touch.
This process will round the edge of the metal and create a groove in the point.
Step 1 secure the sheet metal to prevent slipping.
Use a die grinder with the mounted point and simply run the point over the edge of the sheet metal.
This weakens the aluminium and creates a fracture line.
The edges may appear flat but shearing dies leave burrs.
Off center rolls have the center of the roll above the original plane of the sheet metal.
This technique allows you to dull the edge in one run instead of breaking the edge on the top and.
A wire edge fig.
