Fiber Laser Welding Applications in The Food and Beverage Industry

Manufacturers of food and beverage products are known to be stringent in ensuring the sanitation and cleanliness of their equipment. Once these equipment and components are improperly designed or manufactured, contamination is likely to occur, ultimately leading to health hazards, tarnished brand reputations, and costly recall actions. These challenges are further exacerbated by labor and raw material shortages, putting additional pressure on manufacturers to remain competitive.
To stay ahead of these challenges, manufacturers need flexible manufacturing technologies that are easy to use, fast, eliminate scrap and rework, and produce devices with superior workmanship. And laser welding offers superior processes that enable smooth surface finishes, faster processes, and elimination of potential bacterial contamination traps, and thus will be expected to play a key role in the food and beverage industry. Materials and joining technologies for the food and beverage industry
The materials used in equipment often influence manufacturing. Stainless steel - particularly grades 304 and 316 - is the material of choice for food-grade applications because of its cleanliness, corrosion resistance and ease of sterilization. With high levels of durability and wear resistance, this type of steel figures regularly in food preparation, processing, brewing and distilling, catering and restaurants. Fasteners such as bolts and rivets, moreover, need to take into account the structure and orientation of joints associated with food contact areas. And this can impose design constraints and increase part manufacturing costs.
Fortunately, handheld laser welding technology enables a higher level of design flexibility, reduces part count by eliminating nuts, bolts and washers, and simplifies machining parts by eliminating threaded holes. Due to its ease of use, versatility and technical capabilities, the technology offers many opportunities for improvement for food and beverage manufacturers in the food and beverage industry.
Handheld laser welding allows equipment designers to bring great results not only on food contact surfaces, but also on all surfaces of the equipment (e.g., welding closed frame tubes) to improve cleaning efficiency.
With significantly lower heat input compared to melting electrode inert gas shielded (MIG) and non-melting electrode inert gas shielded arc (TIG) welding, designers have more fabrication options when working with thinner materials, for example, in non-load-bearing structures to reduce raw material costs as well as the associated transportation costs.
Handheld laser systems for distortion-free welding of mixed materials
In addition, laser welding manufacturing efficiencies can be improved, resulting in higher profits. conventional techniques such as MIG and TIG welding require muscle memory and motor skills. It can take years for a skilled welder to develop the level of expertise needed to differentiate a manufacturer's product from the competition by producing high-quality welds. Laser welding, on the other hand, enables a worker with only basic dexterity or no welding experience to learn how to produce high-quality, consistent welds in a very short period of time.
High-quality welds and easier post-processing
In addition, post-processing of welds - such as grinding and media blasting - adds costs through equipment and additional labor. The availability of low-cost, easy-to-use welding solutions breaks down barriers to accessing specialized skilled labor. Laser welding is also faster than traditional methods, up to four times faster than TIG welding.
The challenges of achieving high quality surface finishes for food-grade processes using conventional welding methods are significant. Laser welding capabilities-such as pendulum welding-allow for rapid scanning of the laser beam across the entire weld path, minimizing spatter and enabling the welding of imperfectly fitted parts, reducing the need for manual post-processing and improving product quality.
In addition, the use of a laser allows the use of a wire feeder to fill in material where necessary, and when it is combined with pendulum welding, it is easy to create superior joints and, in many cases, may not require post-process grinding.
Another key issue is the potential for micro-cracking, which can occur in thinner joints when using conventional welding. This can be avoided due to the low heat input of laser welding and the ability to stabilize the weld pool from oscillation.
Prior to welding, debris on the surface of the part may create inclusions and other defects. Many handheld laser systems now also offer laser cleaning capabilities that remove pre- and post-weld fumes, as well as removing discoloration from heat-affected areas and allowing for surface passivation.
In contrast to resistance spot welding, which is non-contact and precise, laser spot welding completely eliminates tip pressure and alignment issues, resulting in higher quality products and preventing problems such as indentations and asymmetrical welds, which can lead to bacterial growth and visually inferior products, respectively.
In addition, laser spot welding provides more design flexibility by requiring contact with only one side of the part. With very little heat input compared to TIG welding, thin parts can be spot welded at significantly higher rates.
Meeting the hygiene and cleanliness requirements of the food and beverage industry can be a complex task. Handheld laser welding and cleaning technologies, such as IPG's LightWELD system, offer significant advantages in food-grade welding; they provide flexibility in equipment design, increased productivity, reduced costs and improved quality. By adopting this technology, manufacturers can improve food safety, streamline production processes, and ensure customer satisfaction.
Handheld laser welding and cleaning offers many advantages over traditional welding methods and can help improve weld quality and consistency while reducing production time and costs.