Edge Rounding

In the world of industrial sheet metal processing, it is common practice to round all sheet edges after cutting. By rounding edges, also known as edge breaking, you can achieve the desired radius on your sheet metal edge. This removes the sharpness from the sheet metal and prepares it specifically for further processing, for example for painting.

In general, edge rounding comes after deburring. During edge rounding, sharp edges are removed and the sheet metal edges are rounded. Depending on the application, it can be important to remove the sharpness of the edge. Larger radii in the range of 0.5 mm are necessary to prepare the sheet metal for reliable coating (painting, galvanizing). Occasionally, radii of up to 2.0 mm are required which can be achieved with Bonray machines as well.

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Features

  • Automatic edge rounding and deburring
  • Removes sharp edges and residual burrs
  • Uniform processing across the entire workpiece
  • Improves coating and painting adhesion
  • Adjustable conveyor speed
  • PLC intelligent control system
  • Stable operation with low maintenance
  • Supports continuous production lines

Working Principle

The machine transports metal workpieces through multiple processing stations equipped with abrasive belts and rotating roller brushes. During operation, the abrasive system uniformly removes sharp edges and burrs while creating a controlled edge radius on the workpiece surface.

The process improves surface consistency without affecting material dimensions or structural integrity.


Applications

The Edge Rounding Machine is widely used in:

  • Laser-cut sheet metal processin

Advantages:

1: Avoidance of injury

Sharp edges on cut sheet metal parts pose a major risk of injury. On the one hand for the user of your products. On the other hand, for your employees who are responsible for handling, assembling and processing sheet metal. Rounded edges prevent injuries when handling sheet metal parts and thus ensure greater safety.

2: Improved paint adhesion

Liquid coatings and powder coatings have a tendency to peel back on sharp edges. Rounding the inner and outer contours of sheet metal edges ensures that any type of paint or coating can be applied reliably and with long-lasting adhesion. As a result, edge rounding ensures a sealed paint layer.

3: Reduced Secondary Processing

ounded edges help coatings such as powder coatings, wet paints or galvanised coatings to adhere better. Zinc coatings in particular are more sensitive on sharp edges and can lead to corrosion problems. Standards such as DIN EN 1090 therefore require an edge radius of at least 2 millimetres to ensure corrosion protection.

4: Longer service life of machines and components

Sharp sheet edges can cause damage to moving cables and hoses in machines, which can lead to machine failures. Rounded edges minimise the risk of these failures and promote a long service life for machines or components.


Combination:

Edge Rounding with Rotary Brushes:

Rotary brushes are equipped with abrasive lamellas. By the rotation of the brushes, the abrasive filaments are pulled across the sheet metal edges and thus achieve their powerful impact on the part edges. While the parts on a conveyor belt are moved under the rotor, the rotary brushes make contact with the part from above. An additional carousel is particularly effective - the so-called rotor - that holds several rotary brushes, which allows for the parts to be uniformly processed from all directions. That is why of all rounding processes, rotary brushes achieve the best and also the most consistent edge rounding results.

  • Q
    What is the main business scope of Anhui Bonray (PES)?
    A

    We are a high-tech enterprise integrating R&D, production, sales, and service of laser auxiliary equipment, specializing in laser cooling solutions and integrated handheld laser welding equipment.

  • Q
    How do you ensure product quality?
    A

    We strictly implement ISO9001 and ISO14001 systems, rigorously controlling the supply chain and production to ensure stable quality and continuous innovation.

  • Q
    How do Bonray products perform in the international market?
    A

    Our equipment is exported to Europe, America, and Southeast Asia, with tens of thousands of units delivered to hundreds of customers, earning global trust through efficient solutions.

  • Q
    Why choose Bonray as a partner?
    A

    Adhering to the philosophy "Excellence through Professionalism," we impress partners with outstanding technology, stable quality, reasonable pricing, and premium service.

  • Q
    In which fields are your products primarily applied?
    A

    We focus on high-tech laser applications, dedicated to providing professional laser auxiliary equipment and integrated welding solutions for global customers.

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