The Hi-Net DMC-900HN by Johnford is used by aerospace manufacturers and mold/die shops that want speed, rigidity, and precision in a competitively priced double column machining center. Absolute Machine Tools, Inc. offers this 26,400 lb heavyweight bridge mill, which is specifically engineered for high speed net shape machining of complex 3D parts.
Solid machine construction is key to the Hi-Net DMC-900HN’s performance. The DMC tackles a variety of materials at high feedrates and with a high degree of accuracy. It heavy Meehanite castings provide the strength and vibration dampening required for improved surface finishes and extended cutting tool life. The columns and bridge are a one-piece casting for the best rigidity. A large Z axis head and Y axis saddle feature square boxways and diagonally arranged ribs to minimize distortion caused by years of continuous service.
• Delivers the speed and precision for high speed aerospace and mold machining
• Net shape machining of complex 3D shapes
• Exceptionally rigid machine ensures excellent surface finishes
• High quality integral spindle is standard equipment
• Sports standard features others offer as options
The Hi-Net DMC-900HN features a moving table, fixed column design that provides maximum rigidity. A rugged 90° bridge with offset Y axis ways and a wide saddle keep the spindle center line close to the bridge for further rigidity. The X axis table traverse is accomplished via heavy duty Schneeberger roller linear ways for accurate positioning of heavy work pieces. Large diameter, pretensioned ballscrews and powerful servo motors further ensure accurate positioning.
The bridge mill delivers XYZ travels of 35” X 35” X 30” and rapid rates of 944”x 944” x 590” in X, Y, and Z. The rugged and rigid machine handles table loads up to 6,600 lb.
The Hi-Net DMC-900HN boasts a number of productivity enhancing features that are sold as options on competing machine tools. Weiss integral spindles, made in Germany, are standard equipment. The machine’s standard 15,000 RPM HSK-100A spindle delivers 56 HP and 300 ft-lb of torque – at just 1,000 RPM – for heavy cutting and fine finishing. For medium roughing and even finer finishing, a 24,000 RPM HSK-63A spindle delivers 31 HP and 53 ft-lb of torque at 3,000 RPM. Both spindles feature ceramic bearings and air-oil mist lubrication for best life. An 18,000 RPM grease packed HSK-63A spindle is also available for medium roughing and fine finishing. This spindle provides 30HP and 85 ft-lb of torque at 2,400 RPM.
The standard Fanuc 18iM-B with alpha I series servo motors and AI NANO HPCC is standard for high speed, high accuracy machining. The control provides 600 blocks look ahead/150,000 blocks/min processing. A 640MB ATA built-in card provides mass program storage and Ethernet connectivity.
Other standard features include a 24 tool ATC (HSK-100A) or 24 tool (HSK-63A) ATC mounted to the machine column for easy maintenance, a chip removal system with twin screw type conveyors that discharge into a caterpillar type conveyor, a high volume coolant system, and a full machine enclosure to contain chips and coolant. Larger tool changers are also available.
Hi-Net DMC-900HN SPECIFICATIONS
Travels
Longitudinal Travel (X) Axis 35"
Cross Travel (Y) Axis 35"
Vertical Travel (Z) Axis 30"
Table
Table Working Surface 39.4" x 33.5"
Maximum Workload on Table 6,600 lb
Feeds
Rapid Traverse Rate X,Y,Z 944, 944, 590 IPM
Cutting Feed Rate 0.01 - 472 IPM
Positioning Accuracy +/- 0.0003" full stroke
Repeatability +/- 0.0002"
For more about Absolute Machine Tools, its product lines, and services, please visit www.absolutemachine.com or call (800) 852-7825.