5 Axis Gantry

The Y-axis crossbeam features a symmetrical "box-in-box" design, with the ram nested inside an outer box structure; the spindle centerline aligns precisely with the central axis of both the crossbeam and the ram. When workshop temperatures fluctuate (e.g., a difference of over ten degrees between summer and winter), the crossbeam and ram undergo synchronous thermal expansion and contraction. Thanks to the symmetrical structure, the shift in the spindle centerline is minimal, resulting in machining accuracy that is less affected by ambient temperature compared to asymmetrical designs.

Equipped with an Ibag Mepro T70-200 five-axis milling head, the A and C axes are directly driven by individual torque motors. This non-contact drive system eliminates intermediate components such as gears, worm gears, or belts. Key advantages include zero backlash (maintaining accuracy during reversals), long-term stability due to the absence of mechanical wear, and superior surface finish resulting from the lack of gear-mesh vibration and noise. With a braking torque of 4000 N·m, the head locks securely without sagging during power outages or emergency stops.

The spindle is equipped with a cooling unit that circulates coolant around the spindle's outer housing to dissipate heat generated during high-speed rotation. Bearings utilize oil-mist lubrication, providing simultaneous lubrication and cooling. Internal temperature sensors trigger an alarm if the temperature exceeds the set range, preventing spindle damage due to overheating.

The X, Y, and Z axes are each equipped with four heavy-duty 55-series roller guideways. The X-axis features two rails on each of the left and right bed sections; the Y-axis crossbeam has four rails distributed at equal intervals; and the Z-axis ram has one rail on each of its four faces. This configuration provides a wide load-bearing surface and reduces the load on individual slide blocks, ensuring smooth motion.

The ram utilizes a square configuration with four roller guideways-one on each face-providing a large effective guiding length. When the ram extends 1250mm for machining, all four guideways provide simultaneous guidance and load support. Cutting forces are distributed across four directions, minimizing ram oscillation and ensuring stable cutting. This design offers superior rigidity compared to configurations using only two diagonally opposed guideways.

The system employs external cooling. Screw-type chip conveyors are installed on both sides of the machine bed to collect chips generated during machining and transport them to a slat-type chip conveyor located at the front of the machine; the slat conveyor then discharges the chips into a collection cart positioned to the side. Once collected, the chips can be easily wheeled away and dumped, eliminating the need for manual pit cleaning.