Double Column CNC Vertical Lathe 

VDK2500E    VDK3150E    VDK3500E   VDK4000E

Machine Summary

• The series CNC double column vertical lathe is designed by absorbing modern advanced design and manufacturing techniques and using CAD optimization design method, using the latest design concept and equipping with domestic and foreign advanced features.
• Realize strong cutting on the structure performance, the worktable overweight load, machine high dynamic and static stiffness, all movement safety and stability, long service life and high processing efficiency.
• The machine is suitable for high speed steel and carbide cutting tools, processing workpieces of all ferrous and non-ferrous metals and some nonmetal materials.
• The machine can complete the process of rough and finish turning inside and outside cylinder, inside and outside cone surface, plane surface, the circular arc surface and grooving.

Performance and Feature

Gantry-frame
1. The series lathe adopts frame-type gantry structure with double column and connection beam. Both column and beam adopt high strength and low stress cast iron parts with material toughness, proper annealing treatment, plus box-type structure design, high rigid body structure, to guarantee mechanical features of heavy cutting resistance ability and high stability.
2. Equipped with retractable stainless steel enclosures prevent slippery, to protect the screw and guide rail.
3. The beam and column guideway adopt grinding process after intermediate frequency quenching, quenching hardness is 45 to 55HRC.

Workbench
1. The worktable base adopts high strength and high rigid cast iron material, to improve stability and absorb vibration. Unique thermal symmetric structure reduces thermal deformation of worktable, to ensure the worktable a long-term stability. Workbench and column are installed respectively on the base after the connection, the overall structure of the machine more stable.
2. The spindle is equipped with spindle encoder, to realize constant linear speed cutting.
3. Workbench with T-slots, including double T-slots used to install the chuck claw, single T-slot used to install auxiliary fixture and accessories.

Main Drive
1. Main transmission is driven by horizontal AC servo main motor, main motor and gear-box connect through spring coupling, variable speed drive by vertical mechanism, realize turning the required speed range. AC servo gear-box adopts horizontal four shifts stepless gear-box, suitable for processing all material workpiece.
2. Changing speed is controlled by electromagnetic valve controlling oil cylinder and oil-way, in order to prevent shifting cylinder pressure relief, equipped with pressure relay, in controlling the oil accumulator machine hydraulic lock mechanism, to ensure reliable transmission. All gears in gear-box adopt quenching and grinding, so gain high transmission precision and efficiency, and reduce the transmission vibration and noise.

Feed
Left and right vertical tool-post horizontal feed(X,U-axis) and ram vertical feed(Z,W-axis) are driven by AC servo motor through the gear reducer driving ball screw, the reducer and screw through the flexible coupling connection, high transmission efficiency, small transmission error, high transmission precision.

Technical Parameter