LG-6050 - Gantry Type Machining Center

X-axis travel : 157.4" ~ 787.4"

Y-axis travel : 118.1" ~ 275.5"

Z-axis travel : 39.3"

Dist. between columns : 149.6" ~ 306.9"

Table size ( X direction ) : 157.4" ~ 787.4"

Table size ( Y direction ) : 110.2" ~ 267.7"

Table load capacity : 35,550 PSI

Spindle speed : 4,000 rpm Gear Spindle ( Std. )

5,000 / 6,000 rpm Gear Spindle ( Opt. )

6,000 / 8,000 rpm Bulit-in Spindle ( Opt. )

Spindle power : 22 / 26 kW ( 30 / 35 HP )

( cont. / 30 min. )

Tool magazine capacity : 32 T ( 60 T Opt.)

Standard Accessories

Spindle 2-step gear box

Continuously Variable Transmission

Spindle cooling system

Centralized automatic lubricating system

Fully enclosed splash guard

Twin hydraulic counter weight cylinders

32 Tool magazine

Adjustable torque-limit clutch ( 3 Axes )

X-axis optical linear scale

Y / Z axes external encoder
semi-closed type feedback system

Coolant system with pump and tank

Twin screw type chip conveyor

Recycling lubricating oil collector

Caterpillar type chip conveyor and bucket

Foundation bolt kit

Footswitch for tool clamping

Movable manual pulse wave generator

RS232 interface

Rigid tapping

Tool box

Alarm light

Air gun

Automatic power off system

Optinal Accessories

Coolant through the spindle ( Form A )

Column raiser

Automatic tool length measurement

60 Tool magazine ( LG-XX40 and above models )

Y / Z axes optical linear scale ( HEIDENHAIN )

Universal Head

90˚ Head automatic 5˚ index

35˚ Head automatic 5˚ index

Extension Head :

Gantry Type Machining Center

Introducing YAMA SEIKI with mature manufacturing abilities and advanced technology skills, the LG series gantry type machining center combines gantry type structure with adjustable crossbeam mechanism, strong horse power and high rigidity features, to provide you with a complete machining solution for extra large work pieces. It has been widely used in aerospace, shipbuilding, energy and machine tools industries.

The LG series could be equipped with automatic head changer and vertical / horizontal ATC system to provide maximum efficiency as of a 5-face machining center.

Complete product line with full range specifications, the LG series could be equipped with self-developed milling heads, automatic head storage magazine and vertical / horizontal ATC system to provide high added cutting capabilities for large work pieces.

Modular gear or built-in type spindle design provides different cutting features, to meet with various types of cutting needs.

2,500 kg/m2 heavy-duty fixed working table could meet with all sorts of working conditions for large work pieces.

Floor type tool magazine with speedy tool change is placed on the back of the machine to provide easy operation and maintenance.

Super large separate type coolant tank and two rotating chip augers on both sides of the working table, allows easy maintenance and efficient chip removal while maintaining coolant performance.

Gantry type structure design provides optimal stable dynamic accuracy and the space usage is 40% less than bridge type models.

High Rigidity Structure

Combining our modular design concept and exclusive patented technologies, the LG series provides you with superior machining performance for super large work pieces. The LG-20070 is also the first super large machining center ever introduced with a 7,000 mm ( 275.5" ) cross span among Taiwan manufacturers.

The heavy-duty working table is adopted with high rigidity double layer structure design. It can easily endure super heavy work pieces without deformation. Its floor type design allows the working table to firmly attach to the base which effectively damps machining vibration while ensuring accuracy.

X-axis Modular Design

The working table and side columns are all of modular design. The X-axis travel could be extended based on different machining requirements.

The X-axis is adopted with YAMA SEIKI's synchronous servo control to ensure optimal dynamic accuracy.

Adjustable Crossbeam Mechanism ( Patented )

YAMA SEIKI's patented design has successfully overcome the physical limits, minimizing the deformation caused by the weight of the 7,000 mm ( 275.5" ) super wide crossbeam, while ensuring optimal machining accuracy.

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The Finite Element Method ( FEM ) analysis provides optimal machine design and light-weighted structure advantages while maintaining best machine rigidity.

The crossbeam and side columns are adopted with high rigidity structure design. Plus the contact surface of the crossbeam and slide saddle are all precisely hand scraped to ensure maximum precision, rigidity, and balanced load.

High rigidity roller type linear guide ways on the Z-axis offers the advantage of both boxway's heavy-duty cutting and linear guideway's fast movement and low abrasion capabilities.

X-axis travel 4 m / 5 m models
The 2 sets of large size ball screws, servo motors and optical linear scales are driven by the simultaneous servo control, which lowers the deviation to a minimum while maintaining optimal dynamic accuracy.

X-axis travel 6 m and above models
The patented zero backlash rack & pinion combined with 1µm high resolution linear scale provides optimal dynamic accuracy.

Optimum Spindle System

Unique head design allows the spindle, spindle motor, ball screw and dual hydraulic counter weight cylinders to be symmetrically placed. Hereby preventing thermal distortion and minimizing deflection. Assuring accuracy and heavy-duty cutting capability.

Inner-rail embraced structure provides high rigidity and good stress flow which minimizes over hang and vibration issues.

The Y-axis roller type linear guide ways offset from each other, increases structural rigidity and reduces distance between the spindle to cross beam which enhances overall cutting performance.

2-speed super heavy-duty gear box

Floating type hydraulic tool release device eliminates pressure on the spindle bearing when releasing a tool.

4,000 rpm high torque spindle is equipped with powerful 26 kW ( 35 HP ) motor, delivering maximum torque output of 977 Nm at 254 rpm which can meet with various heavy-duty cutting conditions.

5,000 / 6,000 rpm gear spindle ( Opt. )

The built-in motor design reduces centrifugal force effect and restrains spindle vibration, which increases the spindle life span and improves long-term machining accuracy.

Floating type hydraulic tool release device eliminates pressure on the spindle bearing when releasing a tool.

6,000 rpm and 8,000 rpm are available, which provides maximum 600 Nm torque output at 350 rpm to meet with various working conditions.