GVH-2500 - Super Sized Vertical Turning Center

Super Sized Vertical Turning Center

With 40 years of trust and faith from each of our customers, you can now hold on to the present and future by experiencing Yama Seiki's latest state-of-the-art vertical turning center. The all new SUPER GV series, gives you more than you can imagine.

With leading technologies and high quality components, the SUPER GV CNC vertical turning center combines heavy-duty, high rigidity and super large machining range advantages to provide you with large sized, asymmetric work piece turning capabilities. The optimal reinforced structure of these series can maintain long term precision even if the table diameter is reached up to 8,000 mm ( 314.96" ). Plus, with the optional dual ram or live tooling spindle and C-axis, all kinds of complex turning applications can be done easily, which can meet your needs for today and tomorrow.

Super Large Turning Range

Maximum turning diameter can reach up to Ø 9,000 mm ( Ø 354.33" ) ; maximum work piece weight can reach up to 300,000 kg ( 66,100 lb ) ( GVB-8000 series ).

High Rigidity Structure

The bed, column and bridge casting components are of Meehanite casting with a symmetric structure design, which ensures optimal thermal balance and heavy duty rigidity.

Powerful High Torque Motors

The work piece and live tooling spindles uses a high power 2-speed heavy-duty gear box motor to provide ample torque output for heavy duty cutting applications.

High Effeciency Chip Removal System

The standard chip wash down coolant system can flush away great amount of chips into the coolant tank, and are sent outside from the machine through the chip conveyor; this tremendously improves the machine's overall accuracy by lowering thermal expansion effects to a minimum.

Turning, Milling And Grinding Multi-Tasking Capability

The optional live tooling spindle provides turning, milling, grinding, drilling, and tapping capabilities, which greatly increases production efficiency while saving equipment investment costs.

High Rigidity Structure

By using Finite Element Methods ( FEM ), optimal reinforce ribbings are directly cast into the bed and column structure. Mechanical rigidity has been increased by more than 30% when compared to conventional designs. The SUPER GV series is capable of performing super heavy-duty turning and maintain long-term super high-precision accuracy.

The heavily ribbed, symmetric box-type designed bed, column and cross beam are of Meehanite casting. This high rigidity structure can effectively reduce thermal distortion while increasing heavy-duty cutting capability and maintaining machining accuracy.

Super large box way

Contact surfaces of all slides are precision hand scraped

The optional high resolution linear scale

Moving Cross Rail Structure

The moving cross rail structure is installed with a set of symmetric ball screws which is driven by servo motors to provide high precision and heavy load axial feed capability.

The structure uses two sets of live locking bolts to support the cross beam. After precision positioning, the bolts will be locked by a hydraulic clamping force to ensure the overall rigidity.

The space between each step of the positioning mechanism is 200 mm ( 7.87" ) which can easily fulfill various types of machining requirements.

ATC System

Standard 16-tool umbrella type magazine is designed with cam movement mechanism which provides bi-directional tool selection, low noise and accurate positioning advantages.

The optional 24-tool umbrella type magazine provides ample amount of tools which can easily fulfill complex work-pieces machining applications.

Tooling Spindle

The square ram on the tooling spindle is adopted with a closed-type design and fixed with powerful wedges. This gives the SUPER GV series with greater structural rigidity and machining accuracy compared to peer models with a semi-closed type square ram structure.

Dual Ram Structure

With the optional dual ram structure, multiple machining applications ( such as rough turning / fine turning or drilling / tapping / milling ) can be operated at the same time; one machine can replace two vertical turning centers which saves tool change time and increases floor space usage.

Work-Piece Spindle

The work piece spindle uses high power 2-speed gear box motor which provides 74,140 Nm torque output under low speed ( GVH-2500 ); various large sized work pieces can be overcome easily.

The high reduction ratio 2-speed gear box uses high hardness Nickel-Chromium-Molybdenum alloy with forced oil-feed for lubrication and coolant; the gear box can maintain optimal performance with long life span.

Cross Roller Bearings

The high rigidity high precision cross roller bearings can sustain high radial, axial and torque load, which greatly reduces deformation and thermal errors while increasing the rotary table's rotational accuracy and load capacity when working on heavy work-pieces.

Hydrostatic Bearings

The high rigidity hydrostatic bearings provide absolute zero static friction coefficient and low kinetic friction coefficient which can easily drive the rotary table without needing high torque output. Plus the stick-slip effect is eliminated under low speed which provides stable and smooth rotating movement while maintaining maximum dynamic accuracy.

The hydrostatic bearings provides great damping in vertical movement and low damping in horizontal movement. The oil film damper provides outstanding dynamic rigidity.

Live Tooling Spindle

The live tooling spindle uses Japan NN Type roller bearings to provide high rigidity, high precision, and long life span advantages.

The high reduction ratio 2-speed gear box uses high hardness Nickel-Chromium-Molybdenum alloy with forced oil-feed for lubrication and coolant; the gear box can maintain normal operation and low wear even under long hours of low-speed, high-torque working conditions.

High Rigidity C-Axis