Uniform edge rounding - with profiRounder machines

Deburring sheet metal blanks is almost standard in the sheet metal processing industry today. Many of the technologies used on the market deburr the sheets and produce certain but not uniform edge rounding. That is often no longer enough, because all edges should be of the same quality. Uniform edge rounding requires the right kinematics. All work piece edges must be reached by the tools with the same frequency and intensity.

The challenge of uniform edge rounding

Generating a strong, but above all constant radius on all work piece edges is a major technical challenge. This applies particularly to complex work piece geometries.

 

Technical challenge: Uniform edge rounding
At profiRounder machines, this is achieved through sophisticated kinematics:

The disc brushes used in the RUT unit (also called cup brushes or sanding plates) touch all tool edges equally often and from all directions. This works due to the kinematics. The tools describe an oval in their movement and the direction change takes place outside the work area. This prevents double intervention in some places and too little intervention in others.

 

Other processes - e.g. cross-brushing - have a preferred direction and always work more intensely on the edges that are aligned in the feed direction than on the transverse edges.

 

The situation is similar with planet heads, because all brushes on a planet head have the same direction of rotation.

 

Even machines with large rotors process parts that are placed on the outside of the conveyor belt more on the entry and exit sides (transverse edges), while the longitudinal edges are processed more in the center of the feed carpet.

What are the advantages of uniform rounding of edges?

Uniformly rounded cutting edges with defined radii have several advantages:

 

In systems that do not process all edges equally intensely, the weakest rounded edge must meet the specifications in the drawing. At the same time, however, this means that the greater rounding in the other places happened without necessity - consequently means a waste of resources.

 

Exemplary:

The drawing says - all edges are deburred according to DIN 13715 | -0.2 mm to -0.5 mm.

 

Assuming a cross brush reaches -0.2 mm with a certain setting on the edges that are aligned parallel to the brush unit, then the edges that the brush hits directly are rounded to a much greater extent. In practice, fillets of> -0.4 mm then appear here. This processing exceeds the drawing specification without need - only in order to achieve the 0.2 mm on the weakest processed edges.

 

The profiRounder has been consistently developed in such a way that uniform edge rounding is achieved on all edges and is therefore the most efficient machine on the market.

Intense edge rounding

The RUT unit can do more than uniform edge rounding. Since a total of 18 disc brushes are used, this rounding can also be set intensively. At the same time, this means - for all parts that need a normal rounding, you can work at a higher feed rate, which then increases throughput and efficiency. To achieve perfect results, we offer various disc brushes for the profiRounder grinding machines. Depending on the hardness of the brush and the length of the bristles, a wide variety of requirements can be met. In addition, the rotation speed and the rotational speed of the plate brushes can be adjusted.

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Karl Heesemann
Maschinenfabrik GmbH & Co. KG
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