In general, burrs mostly occur at the edges, but the deburring machine can be processed on the entire sheet metal surface. Due to planning reasons, the grinding brush or sanding belt will inevitably leave traces on the surface of the workpiece, especially for stainless steel or aluminum. These metals are generally not painted or coated so that they do not rust. However, the processing marks are visible on the surface of the workpiece, which will greatly affect the overall appearance of the product.

After the deburring process is completed, the next process needs to be decided according to the needs: some users or customers attach importance to the appearance of the workpiece when it comes out of the machine, which makes it necessary to install the appearance treatment of the processing unit for the deburring machine. Depending on the model, this unit can then be added to the machine so that the user can respond sensitively to changes in customer needs. This retrofit option brings greater convenience and sensitivity to the customer-funded deburring machine.

If required, the external treatment unit can be continued after the fillet processing step of the deburring machine. The grinding brush and sand belt finish the edge and surface treatment of the part, and the burr or material splash has been completely removed at this time, which is an important prerequisite for obtaining good processing results.

The exterior treatment unit itself is equipped with a fine sand belt, an abrasive flannelette or a rotating brush. Sand belt or abrasive flannelette will generally be mounted on two rollers, specifically to deal with the appearance of sheet metal. This allows the user to obtain a uniform and beautiful workpiece. The rotating brush is used to achieve directional surface finishing for the user. It moves around the circle and grinds repeatedly on the workpiece from different directions to create a clean and bright appearance.

Before making a decision to purchase a surface treatment unit, you can carefully investigate the entire process chain. The appearance of the sheet metal is at risk if the process of bending, welding, or installing a pressed nut is required after the deburring process. Due to any further processing may damage the appearance, such as leaving scratches. This leads to the loss of the beauty of the workpiece after the appearance treatment.

If the entire process chain requires processing sensitivity, then attention should also be paid to the rational use of other functions of the deburring machine. For example, the external processing unit can be turned on and off at any time, so that the machine can complete other processing tasks as required. If the customer wants an alternative finish, the processor can quickly and simply replace the abrasive. It is worth mentioning that it is necessary to equip a dust removal system that can be integrated in the machine. It ensures the safe operation of the deburring machine and is "plug and play" without the need for rated connection.