Refining surface processing: the emerging role of wet blasting in additive manufacturing
In the age of additive manufacturing, where the creation of complex, lightweight components is the order of the day, post-processing is playing an increasingly crucial role. The process of wet blasting, traditionally a niche area, deserves special attention due to its efficiency and versatility. Discover with us the advantages and areas of application of this advanced technology.
Contents:
- The financial significance of post-processing
- How wet blasting works
- Comparison: wet blasting and dry blasting
- Use of wet blasting for additively manufactured components
- Advice from the expert
- Summary
Introduction:
Additive manufacturing is revolutionizing industries such as automotive, aerospace and medical technology with its ability to produce complex and material-saving components. But the challenges remain, especially when it comes to surface treatment. This is where wet blasting comes into play, a traditional but highly effective process that is being reinterpreted to meet the specific requirements of post-processing.
Post-processing as a cost driver
The cost of post-processing can far exceed that of the actual printing process, underlining the need for efficient, automated solutions. The challenge is to refine the surfaces to improve both the aesthetics and functionality of the parts. The development aims to replace costly manual processes with reproducible and automated systems that can be applied to a wide range of materials and geometries.
The technique of wet blasting
Wet blasting combines water with abrasives to create a powerful mixture that is propelled onto the target surface using compressed air. This process is ideal for sensitive precision parts as it is completely dust-free and minimizes the risk of material damage. Wet blasting is particularly effective for additively manufactured components, as it enables a high-quality surface finish while eliminating the risk of inclusions.
Comparison: wet vs. dry blasting
Compared to traditional dry blasting, wet blasting offers numerous advantages:
- It is dust-free, which avoids the risk of electrostatic discharge and explosive dust concentrations.
- It prevents inclusions and preserves the integrity of the surface quality.
- It generates less heat, which is particularly advantageous for sensitive, thin-walled components.
These properties make wet blasting the preferred method for post-processing in additive manufacturing, especially for metal parts produced using direct metal laser sintering (DMLS) or selective laser sintering (SLS).
Areas of application for wet blasting
Wet blasting proves to be particularly versatile, both in cleaning and in the finishing of 3D-printed components. It efficiently removes residual powder and support structures, significantly reduces surface roughness and optimally prepares workpieces for subsequent finishing processes. In addition, its adaptability to different materials and geometries enables a wide range of surface finishes.
Expert advice
Before implementing wet blasting in the finishing process, it is advisable to seek the expertise of specialists. Based on their experience and knowledge of the material properties, they can provide valuable advice on the optimal application and integration into existing production lines.
Conclusion
Wet blasting is establishing itself as a key technology in the post-processing of additively manufactured components. Its ability to deliver clean, precise and reproducible results makes it an indispensable tool in modern manufacturing. With the right application and the expertise of experienced specialists, it can significantly improve the quality and cost-effectiveness of 3D-printed components.