Doosan DHM-800

The Doosan DHM-800 is a large horizontal machining center (HMC) with an 800 mm pallet size, designed for high-productivity machining of medium to large prismatic components in a pallet-based production environment. Manufactured by Doosan Machine Tools in South Korea, the DHM-800 bridges the gap between standard mid-size horizontal machining centers and the dedicated horizontal boring mills used for the very largest workpieces. It is well suited to aerospace structures, automotive powertrain components, and heavy industrial castings that require multi-face machining with high spindle utilization.

The DHM-800's pallet-based design is central to its productivity advantage over boring mills. While a boring mill typically machines one workpiece at a time and requires manual setup between parts, the DHM-800's two-pallet automatic pallet changer allows one pallet to be machined while the operator sets up the next workpiece on the second pallet. This overlap of machine time and operator setup time dramatically increases spindle utilization rates and overall throughput on repeating production parts. The 800 mm x 800 mm pallet accommodates substantial workpieces while keeping machine cycle times manageable.

Doosan equips the DHM-800 with a Fanuc 31iB5 or Siemens SINUMERIK 840D sl control, both offering full 5-axis interpolation capability when used with the standard 4th-axis rotary pallet system. The control system manages the pallet changer, tool management for the large-capacity tool magazine (typically 60 to 120 tools), and integrated workpiece probing for automatic tool length and workpiece offset measurement. High-speed look-ahead and jerk control algorithms in the CNC optimize surface finish and dimensional accuracy during complex contouring passes.

The spindle system on the DHM-800 typically features a BT50 or HSK-A100 taper (depending on configuration) driven by a high-torque spindle motor producing 37 to 52 kW depending on the option selected. Maximum spindle speed of 6,000 to 8,000 rpm allows the DHM-800 to handle both the heavy roughing cuts common in aerospace structural work and the higher-speed finishing passes needed for close-tolerance bores and milled surfaces. Linear scales on all axes provide full closed-loop positioning for the high accuracy standards demanded in aerospace and precision industrial manufacturing.

In the competitive HMC landscape, the Doosan DHM-800 offers a strong combination of workpiece capacity, spindle power, and production-oriented features at a price point favorable compared to Japanese and German competitors of similar pallet size. Buyers typically include large Tier-1 aerospace and automotive suppliers, general engineering job shops serving heavy industry, and captive manufacturing departments that run high-mix medium-volume production. Doosan's global service network and readily available spare parts supply chain are important factors for production-oriented customers who cannot tolerate extended machine downtime.