In-Depth insight into the grinding of stainless steel corner welds

Challenge

In the metal processing industry, we often face challenges, especially when it comes to the precise processing of corners. Our client, who is involved in the production of such products, has expressed the need for an effective methodology to achieve a uniform and high-quality processed surface on corners, which would match flawlessly with the rest of the product's surface. It is a complex process that requires special attention and customized technique.

Choice of tools

For demonstration purposes, we have decided to use quick-change discs on an angle grinder. We chose discs of smaller diameters (75, 50 mm) as they allow for better control and precision in work compared to larger discs, such as those with a diameter of 115 mm. The choice of tools is crucial for achieving the desired results, as it enables the execution of precise and controlled movements, which are essential for quality processing.

Quick-change Discs

Quick-change Discs

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Grinding process

Coarse grinding

The first step in the process requires coarse grinding of the corner weld, where it is extremely important to maintain the correct shape and symmetry of the corner. In this step, it is necessary to be especially careful to prevent excessive removal of material, which could lead to unwanted deformations or loss of symmetry. We ground this weld with a granularity of 120, although a granularity of 80 can also be used, depending on the quality of the weld.

Use of a unitized disc

The next step involves using a unitized disc made of pressed non wowen, which provides less aggressive but effective grinding, ideal for processing rounded edge parts. This disc serves as a link between coarse grinding and the final stages of processing, such as satin finishing. With its help, it is possible to precisely process both flat surfaces and corners, where it is crucial to maintain uniform material removal without reducing the corner radius.

Satin finishing

To achieve the final appearance and texture of the surface, a non wowen coarse wheel is used. In this phase, we used a wheel combined with non wowen and sanding cloth. It is important to keep a steady hand and perform straight movements during this step to prevent the formation of uneven patterns.

The final stage of processing is the use of a fine non wowen finishing wheel, which adds a final shine to the surface and ensures that the ground surface perfectly matches the pattern on other parts of the product. This step is particularly important for improving the aesthetic appearance of the product, where it is crucial that the previous phases have properly prepared the surface.

non wowen wheels

non wowen wheels

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Additional phase

As an addition to the process, manual grinding is performed with non wowen in the direction of the pattern, ensuring further integration and harmony of the ground surfaces. This phase represents a key element that contributes to achieving exceptional quality of the final product, as it ensures that the ground surface is seamlessly integrated into the overall aesthetics of the product.

Important

Every metal surface reacts with the environment, which can affect its appearance over time. After removing the protective film, stainless steel looks shiny and silver, but it develops a slight yellowish tint when exposed to air for an extended period. Every processed surface will initially stand out more until a natural adjustment of the color tone occurs due to the reaction with oxygen and other elements in the air.

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