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Machining Pg. 5 New Large-Capacity CNC VMCs for Moldmaking Hyundai WIA introduces two all new large-capacity CNC vertical machining centers developed for machining industrial molds and dies—the F750M (travels: 61" X-axis, 29.5" Y-axis, 28.5" Z-axis) and F960M (travels: 96.5" X-axis, 37.4" Y-axis, 33.5" Z-axis). Standard features found on both M-Series (M=Mold) machining centers include: 12,000-rpm, built-in spindle with Big Plus 50-taper spindle nose, thru spindle coolant with chiller, hardened and ground box guideways and HW MP II CNC Mold Package included in the control. Both the F750M and 960M feature a 12,000-rpm built-in cartridge-type spindle. Ultra-precision class angular bearings provide high-speed accel/decel for smooth machining at high rpms. The main spindle delivers minimal noise and vibration even at the highest cutting speeds, and with the use of a hydraulic tool lock system, machining stability has been increased. The standard Big Plus spindle system (BBT #50) provides dual contact between the spindle face and the flange face of the toolholder—increasing tool rigidity, reducing run out and adding productivity. Spindle motor is 16- to 25-hp with spindle torque rated at 893/732 Nm. Thru spindle coolant is standard on the F750M/960M Series. This feature is particularly useful for deep hole drilling where it's necessary to keep chip flow clear of the cutting surface. Thru spindle coolant also helps to increase tool life and decrease cycle time. All guideways are hardened and ground, wide box type for unsurpassed longterm rigidity and accuracy. By adapting the "semi-rising sliding ways" system, the load on the X- and Y-axis slide way is decreased, dramatically enabling the M-Series VMCs to hold tolerance and repeatability over longer cycle times. The F960M table is further supported at all times by the use of four box ways and two supplemental ways. This allows for a maximum table load of 4,500 kg without any table distortion. The bed, column and saddle of this VMC Series are designed using FEA to ensure powerful cutting and agility. In order to eliminate thermal growth during machining, all axes are driven by high precision, double-nut ballscrews connected directly to the servo drive motors without gears or belts, eliminating backlash. The F750M/960M VMCs are outfitted with 20-tool (40-tool optional on F750M), side mount swing arm type tool changers—offering optimal per- formance with impressive tool change times of 3.5 sec tool-to-tool. With a capacity up to 40 tools (plus one in the spindle), setup time is reduced and run times can be made longer, especially if loaded with redundant tools. The 20 (40 optional) tool swing arm automatic tool changer and magazine are separated by a shutter system, which closes during machining, thus keeping chips and fluids clear of the ATC and magazine. When a tool change is required, machining stops, the shutter opens, the ATC exchanges old tool for new, the shutter door then closes and machining begins again. Number of tools: 20 (40 optional). Maximum tool diameter — OD: 125 mm. Tool selection method: Random. Tool weight: 20 kg. Tool length: 300 mm. To aid in the machining of molds, the Hyundai WIA Mold Package is applied as a standard feature for the F750/960M Series machines. This ensures accurate, and high quality surface finishes and contouring. Main points of the Mold Package include a Fanuc 31iA control, AICC II package, featuring a machining condition selection function, AI contour control II, smooth backlash compensation, thermal displacement feature and automatic power off feature. The all-new F750M/960M Series is easy to program and operate with its state-of-the-art Fanuc 31i-Series CNC control, featuring a 10.4" color LCD with Manual Guide i. A Siemens 825D control is also available. For more information from Hyundai WIA of Carlstadt, NJ, phone 201-636-5600 or visit hyundai-wiamachine.com Rigid-Design Turning Center The Yama Seiki - Goodway GS-3000 series turning center features a 30-degree true slant bed box way design and is engineered for heavy duty cutting of large work pieces up to 22" in diameter. The optional live tooling, C-axis, Y-axis, and subspindle satisfy the demand for a small footprint heavy duty machine with milling, drilling, and front/back-end turning application capabilities. Off-center milling, drilling and tapping can also be accomplished with Y-axis, with travel of 100mm (±50 mm from the center line). The widely spaced box way design provides the rigidity needed for heavy duty and interrupted turning applications and the large spindle bore is suitable for today's oil industry, the company states. The low center of gravity 30-degree slant bed design not only provides smooth chip disposal and easier operator access, but also provides the most rigid foundation for the headstock, turret, tailstock, and sub-spindle, according to the company. The rigid design enables long-term-high-precision turning. Equipped with an A2-8 (A2-11) spindle nose, the turning center features a 4.15" spindle bore; a bar capacity of 4.13"; and 15" hydraulic, three-jaw chuck. The machine's 30-HP, High Torque (Fanuc P motor) Spindle spins to 2,500 RPM 88 MoldMaking Technology July 2013 and provides maximum 852 foot-pounds of torque. Machine's Rapid of 1200 IPM on X axis and Z axis. The standard 12-station turret with 0.3 sec indexing time and the optional 12 station live turret bring the GS-3000 series the capabilities that allow many turning applications to be completed in one machine, decreasing the loss of accuracy that occurs when a part is transferred manually from one machine to another. For more information from Yama Seiki of Chino, CA, phone 909-628-5568 or visit yamaseiki.com