Developed for mass production lines, the compact SH-4000P horizontal machining center from Tongtai has a 35 percent smaller footprint than the previous model, allowing for maximum shop floor space utilization. At only 69 in wide, floor space is minimized. Sold and serviced by Absolute Machine Tools, Inc. (Lorain, OH), the Tongtai SH-4000P HMC is the latest generation, low-cost, state-of-the-art high-speed machining center that can exceed the demands of any shop with high-volume machining needs. Its compact size consumes very little valuable floor space, while its fast speed can deliver more parts per hour than competitive machines costing much more. In this XY traveling column-type HMC, the pallet moves in Z-axis. The APC rotary-type pallet changer located in front of the machine provides easy access, slashes idle time, and exchanges pallets in only 5.9 seconds. For pallet rotation in the machining envelope, a full contouring B-axis precisely indexes the pallet every .001 deg and a hydraulic clamping mechanism is used to clamp the pallet in place for excellent repeatability. The B-axis is high speed, with a 90 deg index time of 0.5 seconds.
The SH-4000P features an ultra-rigid Meehanite cast iron frame with an advanced three-point leveling system. Its eco-friendly LHL/LubeUSA grease lubrication system is standard for ways and ballscrews – no coolant contamination and no waste oil. The 40 mm (1.57 in) diameter ballscrews are class 3 with a double-nut, pre-loaded and pre-tensioned design allowing a blazing rapid traverse rate of 2,362 ipm. Furthermore, high-speed acceleration drastically reduces non-cut time (XYZ acc/dec of 1.0 G). The ABS (Absolute Pulse Coder) servo system does not require zero return. The machine can be started anytime from any position, saving non-productive time. A standard rear discharge chip removal system includes a center trough design with high volume chip wash for efficient chip removal. A combination dual level caterpillar-type conveyor with fines separator is standard and is suitable for virtually any types of chips/material.
At the center of the machine is a high power integral spindle with 15,000 rpm and spindle acceleration from 0 to 7,000 rpm in just 0.48 seconds, and 0 to 15,000 rpm in only 1.9 seconds. Deceleration from 12,000 rpm to stop is only 0.8 seconds. This powerful spindle, which switches windings on the fly, produces 50 hp peak (10 min rating), 35 hp in high and 25 hp in low while producing 184 ft-lb of peak torque at only 980 rpm. To enhance milling capabilities, a Big Plus dual contact spindle is standard. Air/oil mist is used for spindle bearing lubrication to increase spindle life. The standard 60-station automatic tool changer provides ultra-fast tool selection. Tool change time is only 1.4 seconds tool-to-tool through the use of the patented Sankyo RollerDrive™ gearbox for the arm mechanism. Average chip-to-chip time is only 2.6 seconds. The ATC system is a random style system.
A Fanuc OiM-F conversational control is standard to provide reliable state-of-the-art controllers and the latest in servo and spindle technology. The OiM-F can handle the most demanding high-speed machining applications and is available with a full complement of high-speed machining options for mold detail and electrode machining.
Absolute Machine Tools, Inc., 7420 Industrial Parkway, Lorain, OH 44053, 800-852-7825, www.absolutemachine.com.
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