Burnished finish is a type of finish applied on copper usually after fabrication of planters and other items.
Burnish sharp metal edge copper sheet.
You can also use a pair of scissors or a utility knife but the edges are very sharp so you will want to be careful.
For lack of better tools i had to use an angle grinder with a steel cutting blade and used a piece of angle iron to cut against to keep the cut straight.
They include fractures burnishing rollover burrs and work hardening in the adjacent area see figure 1.
The sharp edges can be smoothed and softened using simple tools such as sandpaper and metal files which can be found at hardware or home stores.
Step 3 repeat.
Here are photos of some of my work using 10 mil copper sheets.
As a result rounding small openings from a diameter of 5 8 16 mm becomes child s play.
The blanked edge condition can be improved by adjusting the punch and die clearance tolerance shaving the area of the defected blanked edge designing an appropriate contact profile of the tool and die and understanding the mechanical properties of the sheet metal used.
Figure 2shows a cross sectional profile of the sheared edge of an aluminum blank note the burnished depth fractured depth burrs microcracks and other edge conditions.
R ub transferring is a great way to add a texture or an image to the tooling metal.
I have created metal atcs and metal collage cards with 10 mil copper sheet.
Reducing the damaging effects of fractures burnishing burrs and rollover improves subsequent forming processes.
It always looks different but always great.
For example the image of a coin placed under the copper sheet can be transferred by rubbing or burnishing the metal over the coin with a rounded tool the pen cap works well here as well.
Run the mounted point over the other sides to break those sharp.
Examination of the edge surfaces of cut sheet metal will display differences between the burnish region and the fracture region.
This process will round the edge of the metal and create a groove in the point.
This means this is not a step that will produce the exact same results every time.
I usually use a pair of snips to cut 10 mil.
The compact design of the beveltools concepts introduces unprecedented flexibility in rounding metal pipes and sheets.
The sheared edge exhibits some distinctive characteristics.
In manufacturing practice sharp tools can mitigate burrs.
Step 1 secure the sheet metal to prevent slipping.
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.
Step 1 place the metal on a rubber block to stabilize the piece and leave the edge exposed or place it securely in a ring clamp.
Sheet metal taking the sharp edge off i just cut some 16 gauge sheet metal today for shelves on my welder cart and was wondering what is the best easiest way to make the cut edge not so sharp.
