Lead time reduced by approximately 50% through process integration

Previously, ø500–ø1,000mm-sized parts were first turned on an NC lathe or a large multitasking machine before being machined on a machining center. With the installation of the MU-8000V-L, both turning and milling can be completed on the same machine. As a result—when accounting for preparation work, accuracy checks, and workpiece transfer associated with setup changes—we were able to reduce production lead time by approximately 50%. Larger machines require significantly more effort for setup. The introduction of the MU-8000V-L has greatly improved workability and significantly reduced outsourcing costs for parts of this size range.

High accuracy consistently maintained with minimal effort with Thermo-Friendly Concept
Correction work and calculations for accuracy management are no longer necessary

In addition to heavy-duty cutting, precision machining with tight tolerance requirements is also common work for us. Before installation, we had some concerns about the machining capability of a complex 5-axis system and about the possibility of variations in accuracy occurring during long-run operations. However, after operating the MU-8000V-L, we found that its machining capability is equal to that of our existing #50 taper 3-axis machining centers. Its stability in machining accuracy is excellent, and we can clearly feel the machine’s high rigidity.
Furthermore, dimensional stability is retained at high levels thank to the Thermo-Friendly Concept —just like other Okuma machines—and requires almost no correction work even during Hokkaido’s harsh winters, when temepratures drop below zero. Previously, we had to calculate and predict dimensional changes in advance to ensure machining accuracy. Eliminating this task has allowed us to use more time on other tasks.

With the 5-Axis Auto Tuning function, you just press one button and the machine automatically adjusts accuracy for 5-axis machining.

When 5-axis machining centers are used over long operating periods, machining accuracy tends to decline. Geometric errors—caused by spindle misalignment and tilt—can develop, resulting in noticeable surface step errors during multi-sided machining. Measurement and correction must be conducted on a regular basis, but performing these tasks manually can take up to two hours per machine.
With the 5-Axis Auto Tuning Function (option), geometric errors are automatically measured and corrected with a single push of a button, completing the tuning process in about 10 minutes (in full-mode settings). Because the adjustments are highly accurate, we can use the system with confidence. It frees us from time-consuming measurement and correction tasks, and has significantly reduced machine downtime.(Yuji Kudo)

Improving work efficiency by doing external setup using Digital Twin, maximizing machine utilization rate

The MU-8000V-L is equipped with the OSP-P500, which provides a digital twin environment linking the Manufacturing Department’s office PC with the CNC of the machining center. This greatly broadens what can be prepared in advance. Tasks such as program creation, toolpath verification, and interference check can be handled by the programmer, while the machine operator can stay focused on setting up the next workpiece without stopping the machine. We expect this to further increase overall machine utilization rate. (Yuji Kudo)
Although we are still in the process of examining and validating how best to utilize Digital Twin, it enables both the office and the shop floor to monitor tool wear and accurately estimate machining time. We hope to use this capability to further improve the accuracy of process management. (Issei Asahina)