Bielomatik unveils two welding technologies
Lasers and hot nitrogen are the forces behind two new welding technologies from Bielomatik.
The company has introduced the leadoff model of a planned series called Turn2Weld, as well as a company first — a nitrogen-gas system dubbed Hot Gas.
Designed for bonding small, temperature-sensitive parts that require clean welds and hermetic seals, Turn2Weld combines the advantages of quasi-simultaneous laser welding with infrared (IR) welding. Unlike traditional laser welding systems, which can only join laser-absorbent materials to laser-transparent parts, Turn2Weld can weld laser-absorbent parts together.
“So, you can weld together two of the same materials,” said sales manager James DiStefano, who, along with process engineer Anthony Verdesca, demonstrated loading parts into the K3722, Bielomatik’s inaugural Turn2Weld model, at NPE2018.
Employing two or more 450-watt high-scanning-speed diode lasers, Turn2Weld energizes the surfaces of parts before pressure created by upper and lower servo press units joins them. As the turntable system joins one set of parts, an operator can load or unload a second set; a light curtain on the operator’s side protects workers.
The 9.5-foot-tall K3722 has a footprint of about 5.6 feet by 9.2 feet, but even bigger machines are in the works. It delivers a joining force of 3 kilonewtons; laser power depends on the application.
According to Bielomatik, the Turn2Weld design provides for easy maintenance and access. To change a welding program, operators need only swap in new tooling and specify a new recipe.
Turn2Weld can weld parts with unusual shapes and made from a variety of materials, including PP, PE, ABS, PC, polyamide (PA) and polymethyl methacrylate.
It is appropriate for use with electronics, as well as medical and automotive components. Part sizes vary, based on material and weld length.
Also unveiled at NPE2018 was the K2252 Hot Gas, one of four Hot Gas models currently available from Bielomatik. The 9.3-foot-tall K2252 Hot Gas measures about 9.1 feet by 6 feet.
Hot Gas provides a hot flow of air that delivers a clean, contact-free weld. Depending on the application, it can produce temperatures in a range from about 480 degrees Fahrenheit to 550 degrees Fahrenheit.
It is designed for under-the-hood applications involving difficult-to-weld materials, such as nylons and fiberglass-reinforced plastics, as well as ABS and PP. Applicable parts include engine components made of PA66 reinforced with glass fiber, polyphthalamide, polyphenylene sulfide and PEEK, as well as other technical and heavy-duty thermoplastics.
Unlike IR welding, hot-gas welding works regardless of part color or the absorption characteristics of a particular material.
To enhance process reliability, IR camera monitoring is available. As standard, both the K3722 and K2252 Hot Gas come equipped with 15-inch monitors.
Karen Hanna, copy editor
New Hudson, Mich.,