CNC Lathe

• Рrecision
• Medium
• Big lathe
• With Y-axis
• Vertical cnc lathe

DESCRIPTION OF THE VIPER SERIES CNC TURNING MACHINES

The VIPER machines are modular in design and are specifically designed to perform the full range of turning operations on workpieces made of different materials in a single set-up. All machines have a high degree of flexibility and can be easily converted when production changes to other products.
The bed of the Viper CNC turning centers is made of MEEHANITE cast iron, which ensures the absence of internal stresses and, consequently, the absence of distortion of the structural elements. The frame design is developed using CAD systems and software based on the finite element method.
The characteristic feature of all machines is the "reinforcing tube" in the bed structure, which ensures high resistance to bending and torsion.
The "tube" itself is a structural element that improves heat exchange within the bed.

Viper lathes use the most balanced spindle units possible. The spindle is supported by double-row angular contact roller bearings at the front and double-row radial roller bearings at the rear. The rear bearing is floating and has a unique temperature compensation mechanism.
Machines are available with two types of spindles: belt-driven and two-stage box. In the belt-driven version, the headstock has external stiffening ribs that also act as a heat sink and reduce any thermal deformation. The two-stage box spindle is cooled by oil circulation.

Machines can be equipped with two types of turrets. In the non-drive turret, the cutters are mounted directly in the turret disk from the front, and the boring bars and drills are mounted in holders on the periphery of the disk. The twelve position drive turret has a VDI tool connection. Six of the twelve positions, located on a smaller radius circle, have drive units available.
All guideway surfaces are ground in one pass, ensuring precise positioning of the units and increased motion accuracy. The bed design distributes the load of the cutting forces evenly over the guideways.

Wide guideways provide low specific loads and ensure axial stability, maximum rigidity and high structural rigidity. This increases positioning accuracy and repeatability.
The headstock housing has a symmetrical profile and is reinforced on the outside with additional stiffening ribs that double as air cooling elements. This proven solution provides uniform cooling of the housing and minimizes thermal deformation.
To achieve both maximum precision and long life, the spindle assembly is made of special alloy steel using a unique integrated technology.
Precision bearings and a coupling are used to support high-precision lead screws, whose mechanism together ensures consistent positioning accuracy.

Several versions are available for each Viper Series machine:
L - Machine with extended bed;
MC - machine with tool drive and "C" axis;
S - availability of counter spindle;
G - Gearbox.
Combinations of these versions are also possible, e.g. MSC - machine with tool drive, "C" axis and counter-spindle.

Machine bed

In order to achieve the necessary rigidity and durability of the machines, FEM analysis was used in their design, which allowed to precisely calculate and reduce the maximum stresses in the structure, to optimize the thermal and vibration characteristics of the assembly units and of the machine as a whole.
The rigid monolithic MEEHANITE cast iron bed, which ensures the absence of internal stresses and consequently of distortion of the structural elements, has high damping properties and allows to increase significantly the rigidity of the machine.
The inclined design of the bed (30° for VT15L and 45° for other models) provides additional rigidity, facilitates chip evacuation and easy access for the operator, resulting in reduced setup and dismantling times.

Machine Tool Spindle 
Lathe machining centers use the most balanced spindle assemblies possible. The spindle is supported by double-row angular contact roller bearings at the front and double-row radial roller bearings at the rear.  The rear bearing is floating and has a unique temperature compensation mechanism. High-precision P4 spindle bearings and a solid headstock with efficient heat dissipation ensure high turning accuracy for long-term machine operation.
 Two types of spindles are available: belt-driven and two-stage. In the belt-driven version, the headstock has external ribs that also act as a heat sink and reduce thermal deformation. The two-stage box spindle is cooled by oil circulation. The use of high-torque synchronous AC motors (Fanuc, Japan) provides high torque and power characteristics of the spindle, which is a prerequisite for heavy or long-term turning of the workpiece.

Slideways and Ball Screws 
The use of hardened and ground box-type guideways enables high-precision machining with high stock removal rates and ensures long-term machine stability. All surfaces of the guideways are ground in a single pass to ensure precise positioning and increased running accuracy. The bed design distributes the loads caused by cutting forces evenly over the guideways. Wide guideways provide low specific loads and ensure axis stability, maximum stability and high structural rigidity. This increases positioning accuracy and repeatability. The preloaded, backlash-free ball screws are connected to the servo feed drives by a torsional coupling. If the maximum allowable torque on the servo motor shaft is exceeded, the coupling automatically disengages, providing reliable protection for the feed servo motors.
 

Disk turret

Turning centers can be equipped with two types of turrets. In the non-drive turret, the cutters are mounted directly in the head plate and the boring bars and drills are mounted in holders on the periphery of the plate. High-speed bi-directional indexing (0.9 s to index to the next position) reduces non-productive time.
The twelve-position turret with drive positions (Duplomatic) has VDI tooling. Six of the twelve positions, located on a smaller radius circle, have drive units. The use of a driven tool in a VDI type turret with fast bi-directional tool position selection allows high-precision turning and milling operations without the use of special fixtures and from a single workpiece setup. The driven tool allows axial, radial and angular drilling and milling operations. Drive is provided to the tool involved in the machining process. The positioning accuracy of the turret with drive positions is ±0.0005°. 

Optional equipment 
We offer a wide range of additional equipment and accessories for complex tasks, as well as complete systems for automating the machining process: 
- Counter-spindle with chuck
- Y-axis machining (YMS series)
- Turning turret with tool drive (DUPLOMATIC) and "C" axis control on both the main and counter spindles
- Dimensional tool setting device

- Preformed product catcher
- Robotic loading/unloading line
- Automatic bar feeder

- Chip removal conveyor

- Self-centering steady rests (SMW AUTOBLOCK)

- Automatic door closing
- Programmable tailstock
- Radial-axial blocks for rotating tools
- Blocks with variable angle of inclination for rotating tools
- Blocks for fixing worm cutters (gear making) and much more.