CREDIT: SW
Schwäbische Werkzeugmaschinen GmbH (SW) has launched a cost-efficient and dynamic solution for the machining of structural components: the new BF 12-21D. Optimized for the current automotive trend toward die-cast aluminum body parts, the machine is particularly suited for the large-scale production of vehicle body and chassis components.
“Die-cast aluminum parts are being used more and more frequently in vehicle body construction,” explains Michael Kreuzberger, product manager at SW. “Manufacturing accuracy plays a less important role for such workpieces than for parts like gearbox or stator housings – but producing them economically is all the more important.” The BF 12-21D is the company’s response to this trend: thanks to a new machine concept, the BF 12-21D represents a more cost-efficient solution for applications with higher manufacturing tolerances.
Speed meets economy
The BF 12-21D is built on a new and distinct machine platform compared to other SW models. It features a hybrid drive system, in which the X and Z axes are driven by linear motors, while the Y axis is driven by ball screws. The drives achieve a maximum dynamic speed of up to 120m/min rapid traverse and 20m/s² acceleration. The machine maintains the same high productivity as other SW systems: thanks to its two spindles with independent three-axis units, it easily meets the demands of production lines with high manufacturing volumes.
“As a twin-spindle machine, the BF 12-21D ultimately functions like two machines in one,” emphasizes Kreuzberger. “In terms of performance, it replaces two conventional single-spindle machines – but only requires one set of machine peripherals, i.e., only one control system, one control cabinet, one hydraulic unit, one cooling lubricant system, and so on. It can thus achieve a significantly higher output with a smaller footprint.”
Maximum productivity
Both spindles have their own tool magazine and operate in separate working areas but can also work together in one working area. For example, during automated component changeover in one working area, the second spindle can provide support in the other area. The resulting possibility of quasi-parallel loading during main processing time further increases productivity. Standardized communication interfaces for automation and MES systems as well as an integrated tablet allow for easy status and remote monitoring of the system, thus maximizing machine availability.
Trade fair feedback confirms demand
The BF 12-21D is primarily intended for use in the automotive sector. The demand for such solutions proved evident at EMO 2025, where the machine made its first appearance: “The impressions we gained at the trade fair confirmed that the need for economical solutions is currently particularly high in the automotive market,” says Kreuzberger. “We are meeting this demand with the BF 12-21D – without companies having to accept any loss in dynamics or productivity.”