Vertical Lathe Series Turns Large Parts

Hwacheon Machinery’s VT-950/1150 series of vertical CNC lathes is intended for large-part turning. The vertical turning lathes offer 43.3" and 53" swing over the bed and cutting diameters ranging to 52" with chucks sizes from 24" to 40".

The VT-950 and VT-1150 spindles are oil-cooled and provide powerful chucking for stable, precise machining, the company says. The VT-1150 model’s maximum spindle speed is 630 rpm generated by a 73.5-hp motor, while the VT-950 achieves 1,125 rpm with a 40-hp drive. The geared drive system enables high-torque turning at low speed as well as high-speed turning. The transmission and spindle motor are designed separately to prevent heat and vibration generated from the transmission from interfering with the spindle motor.

The X/Z rapid feed rate is 944 ipm, enabling quick positioning of tools. The VTLs are equipped with a 12-station servo-type tool turret that accommodates tools ranging to 2.5" in diameter and offers indexing time of 0.2 sec., reducing cycle time. A 24-station tool turret is available as an option. Hwacheon’s lathe tool-load detection system software automatically detects and diagnoses tool load during machining to reduce wear and prevent damage, optimizing tool life. The lathes feature an integrated 45-degree angle bed frame to minimize heat distortion and absorb vibration for high precision. Hand-scraped and polished guideways in all axes and a rigid one-piece machine bed enable the VTLs to absorb vibration and promote stability in hard turning applications, the company says.