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shot blasting

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January 30 2024

Post-Processing Techniques in Additive Manufacturing

k999content Blog additive, finishing, manufacturing, process, shot blasting 0

There has been an increasing tendency to move towards additive manufacturing (AM) in recent years. This is due to the process’ enhanced ability to manufacture complex geometries, customised parts, and intricate designs in manufacturing work. However, the secret sauce in ensuring that AM parts reach their full potential is during the post-processing phase. This is because, post the fabrication phase, there may be subtle imperfections which if not attended to during post-processing, can compromise the functionality of the part or diminish its aesthetic value. This article dives into the significant role various post-processing techniques play and how carefully planned post-processing can be the difference-maker in AM.

Mass Finishing

Advanced mass-finishing post-processing techniques are designed to improve the surface finish of AM parts. These methods, which include vibratory finishing, heat induction bending services and centrifugal disc finishing, use media and compounds in a contained environment to polish and smooth parts. Advanced mass finishing plays a crucial role in the post-processing phase of AM, bringing several key benefits to the table. One of its primary advantages is the assurance of consistency and uniformity. Regardless of the diverse geometries of parts, mass finishing provides a consistent finish to each, ensuring that every piece meets the desired standard. Furthermore, this process significantly improves the surface quality of the parts. This enhancement is not just a cosmetic one; a better surface finish often translates to improved functional performance across various applications such as pressure vessels. Whether it is reducing wear and tear in mechanical components or amplifying the aesthetic allure of consumer products, the benefits are tangible and manifold.

Additionally, scalability remains one of the standout attributes of advanced mass finishing. Especially pertinent for higher volume production, this technique is adept at managing multiple parts simultaneously. By doing so, it not only maintains the quality across the board but also guarantees a high throughput, making it an indispensable tool for industries aiming for both quality and quantity in their manufacturing endeavors.

Shot Blasting

Shot blasting is another post-processing technique wherein tiny metallic or non-metallic shots are propelled at high velocity onto the AM part’s surface. This not only cleans the surface from contaminants but also prepares it for subsequent steps like painting or specialized coatings. Shot blasting is a pivotal link to finished fabrication, characterised by its speed and efficiency. The method can swiftly clean and prepare surfaces, positioning it as an ideal choice for expansive AM operations where time is of the essence. Beyond mere cleansing, shot blasting plays a pivotal role in surface profiling. The precision of the process ensures that the desired surface roughness is achieved, setting the stage for subsequent coatings. This meticulous preparation guarantees better adhesion of these coatings, which is integral for many applications.

Furthermore, the longevity imparted by shot blasting cannot be overlooked. The process meticulously removes both imperfections and contaminants from the parts. This thorough cleansing not only enhances the immediate appearance and functionality of the parts but also contributes to their long-term durability. As a result, shot-blasted parts often boast a prolonged lifespan, offering users more value and reliability from each component, reaffirming the importance of this post-processing technique in the AM landscape.

Conclusion

The growth and adoption of AM in industries worldwide have spotlighted the importance of a robust and efficient process chain. As AM continues to redefine manufacturing paradigms, businesses must recognize the pivotal role of advanced mass finishing and shot blasting in optimizing efficiency and accelerating production. As the saying goes, “A chain is only as strong as its weakest link.” In the world of AM, a well-thought-out post-processing strategy could very well be the strongest link in the chain!

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February 7 2023

Shot Blasting – Link to Finished Fabrication

k999content Blog fabrication, finishing, shot blasting, structural steel, welding 0

The completion of a fabrication job means that the fabricated product is ready to be welded, machined etc. as part of the next stage in its manufacturing journey. However, this unfinished material may become dirty and oxidized, covered in mill scale, dirt, and other debris from its manufacturing process. Any type of steel with an uneven surface will need to undergo some form of treatment to smooth and clean its surface so that it can achieve proper adhesion. Here is where shot blasting plays a major role in preparing steel to be aesthetically appealing and resilient for operations. This blog will provide an overview of the shot blasting process, including its benefits and applications in industry.

What is Shot Blasting?

Whilst there are many custom metal fabrication finishing processes, ranging from simply wiping down the surface with a soapy rag to immersing the steel in a bath of complex and often expensive chemicals, shot blasting is one of the most popular and effective methods to clean and prepare dirty or oxidized steel. It is a mechanical cleaning process in which tiny spheres of material are shot at the steel at high speed to remove oxidization and other dirt or debris from the surface. Shot blasting is similar to sand blasting in that material is propelled using pressure vessels at the metal to remove the dirt from its surface, although shot blasting is a much more efficient way to achieve this.

Nuts and Bolts of Shot Blasting

Shot blasting works by propelling spheres of material known as shot media against the steel, which removes debris, oxidization and other contaminants from the surface, leaving behind a completely smooth medium ready for sheet metal fabrication techniques, such as welding and machining. This can be superior to other methods of cleaning steel as shot blasting is more abrasive than alternatives such as sand blasting, getting the job done more efficiently and more effectively. In order to use shot blasting as an effective method for cleaning and smoothing unfinished steel, it’s essential to be aware of the propulsion method as well as the form of shot media. The most effective method of shot blasting involves the use of a centrifugal wheel. This wheel is filled with the shot media and spun to create the necessary velocity. The media is then released from the wheel into the gun, allowing the media flow to be directed to the surface of the steel or other material. Frequently, shot blasting apparatus will also include a recovery system. This often consists of a vacuum used to collect the shot blasting media, allowing the recovered material to be used again.

Final Remarks

Shot blasting is effective for all types of steel and metal that steel fabrication firms work with including Engineering Steel, Stainless Steel, Cast Iron, Black Steel and Carbon Steel. It is a safe and effective way to clean and prepare steel surfaces for the adhesion needed in welding and machining. However, it is not advisable to attempt shot blasting unless the individual is an experienced professional in steel fabrication finishing techniques. Also, if shot blasting is not carried out with diligence and thoroughness, the steelwork could be subjected to corrosion and damage down the line. This could lead to a significant reduction in the lifespan of the fabricated product. Hence, shot blasting is a necessary technique for finished fabrication products – and fabrication firms should make it a priority to leverage its manifold benefits in their ultimate quest to gain more market share!