CNC dynamic beam fixed gantry boring and milling machining center

GY- Series CNC  Dynamic  Beam and Fixed Gantry  Frame-type Machining CenterGY-21B      GY-25B      GY-30B       GY-40B     Machine Summary:GY series machine tool consists of moving table and beam and fixed column.Main structural parts are made of hig

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GY- Series CNC  Dynamic  Beam and Fixed Gantry  Frame-type
 Machining Center

GY-21B      GY-25B      GY-30B       GY-40B    
Machine Summary:
GY series machine tool consists of moving table and beam and fixed column.Main structural parts are made of high strength cast iron and phenotic sand molding with the good shock absorption and thermal stability.The structure of the whole machine is characterized by the high rigidity and high reliability.It is suitable for the processing of heavy and extra-heavy basic parts in the industries of metallurgy,railway,heavy  machine, shipbuilding , electricity generation, automobile , aviation, printing and mold ,especially the CNC processing of all kinds of plane ,curved surface,space curved surface and hole with large weight and long height .It is widely applied in the rough and fine processing of complicated parts of plate,box and chassis.
Structure and performance:
1.The machine tool can finish 4-axis linkage curved surface processing and rigid tapping .The addition of accessory milling head can meet the demand of five-face processing.It can add the accessory milling head according to customers'demand of processing and realize the five-face processing by one time of clamping accordingly.The spindle of boring and milling head is driven by AC spindle servo motor .The output terminal of spindle servo motor is directly connected to the automatic gear box with the top and lower gear.The exterior coder can realize the fixed-direction and rigid tapping of spindle.
2.Apply the computer-aided engineering (CAE) system to finish the optimized structure design and enhance the reliability of machine tool ,and the finite element method(FEM) to take the scientfic analysis and optimization of design structure,which can guarantee the rigidity and stability of the whole machine structure.
3.Apply two-times aging treatment for the cast to guarantee the complete release of internal stress and the precision persistence of the machine tool.
4.The operator can take the right-and-left and vertical adjustment for the operation box during the processing as required.
5.The hydraulic and electrical control systems are located in the maintenance platform in the back of the beam,convenient for the maintenance.
6.Both sides are equipped with the chain-type chip conveyor ,which can collect the scrap iron after the processing and transfer it to the cart in the front of the machine tool.
Guide Type:
1.Guide surfaces of X,Y and W-axis all adopt the injection molding technical to enhance their precision and service life.
2.Z-axis when being equipped with the square ram,it adopts the rectangle sliding guide.
3.When being equipped with the whole-wrapped slideing block,it adopts the static-pressure guide.
4.X-axis adopts the constant flow static pressure guide with the high bearing capacity,strong abilities of shock proof and shock absorption,good precision stability and long service life.
5.The fixed displacement multi-stage pump provides the hydraulic oil with the constant flow for the constant flow static-pressure guide.
6.The beam adopts the composite structure of rectangle up-and-down stage solid guide and rolling guide to neutralize and disturbing moment caused by the offset of center of gravity of spindle box's boring milling head and traverse slide .The upper guide and traverse slide adopt the multiple rolling mechanism with the mechanical unloading structure,Y-axis traverse slide ,transverse guide and slide wedge all adopt the filming treatment to enhance the precision and service life.
7.Hydraulic lock mechanism of beam and vertical ram guide.
Feeding Drive:
1.Y-axis adopts AC servo motor direct-connected with the precision planet reduction box to drive the ball screw.
2.GY-40B is equipped with the screw supporting device,which can avoid the distorted falling of screw rod affected by the gravity.It can be equipped with double gear-rack gear mechanism optionally to eliminate the backlash by the electric control and achieve the linear movement of transmission gear and rack toothing driven shaft.
3.W-axis is equipped with the reduction box and motor with the internal contracting brake to guarantee the stability of beam during the processing.
4.Four axes can all adopt the precision grating scale to realize the fully-enclosed position feedback and guarantee the precision of location and repeated location,where two sets of grating scales on W-axis can ensure the synchronous movement of the beam.
5.X-axis rack and gear transmission is equipped with the double gear mechanical backlash-eliminating reduction box.It can adopt double gear and rack electric control for the backlash elimination optionally.
Ram and Spindle: 
1.Spindle adopts the "gripping-type"tension which can automatically tighten up the parts.The mechanism of tool holder tension is the disc spring tension and hydraulic unlock.
2.The ram and milling head spindle has the function of power protection.Such function can set the limit of spindle's maximal operating power .When the vertical ram extends out totally or has the different accessory milling heads,it can set the power limitation according to the extended ram or peak power output of related accessory milling head,which can guarantee that the ram can extend out completely or the processing security when using the different accessory milling heads to avoid the overloading operations.
3.The vertical ram adopts the nodular graphite cast iron with the standard option of rectangular guide square ram.In case of requiring the large torque output,it can adopt the whole-wrapped square ram optionally.
4.The ram is equipped with the equalizer to reduce the loading of Z-axis screw and prolong its service life.             5.It can be equipped with the boring and milling spindle with the large torque output.Used configurations:high power spindle motor ,two-stage planet gear reduction box(constant temperature and lubrication by oil circulation),rigid coupling,large torque direct-connected spindle,constant temperature and oil circulation cooling. It adopts the constant temperature oil cooler to control the temperature rise of soindle and reduction box.     

Hydraulic System:
1.Hydraulic and lubrication sytem protection.This system has function of pressure relay protection,voltage-loss protection of lubrication duct,alarming protection of oil fluid blockage and oil temperature pretection.
2.The hydraulic system controls the clamping and releasing of spindle,the grabbing of accessory head,hydeaulic balance of Z-axis and clamping and releasing of guide.The hydraulic system possesses the functions of two-stage filtration and low-oil alarming.
3.The static pressure tank is controlled by the constant temperature.Apply the centralized lubrication for the times and measured lubrication of each axis.
Tool Magazine and Accessory Milling Head:
1.It can set all kinds of accessory milling heads grabbed manually or automatically as required. It can also be equipped with the accessory head magazine that changes the accessory milling heads automatically and thus enlarges the technique scope of machine tool processing. 
2.Add the tool magazine in the left column of machine tool.Set tools in the magazine according to the required processing technique .Control the ram to the tool-change point by the program.The tool-change holder finishes the automatic tool-change.
Technical parameters
Table Width mm1600200025003000
Max.loading t/m2810
TravelX-axis travelmmLonger than the workbench length 500
Y-axis travelmm2800320037004700
Z-axis travelmm1000/1250
W-axis travelmm2400-4000
Max.width of 
passing workpiece
SpindleDistance from spindle 
end to table surface
mmAccording to customer request design
Spindle specification BT50/BT60
Spindle transmission Two-stage reduction box
Spindle output powerkw28/38,41/56,55/78,60/84,71/114,100/140
Spindle torque Nm1470-11320
Spindle speedrpm10-1500/10-3000
Feeding speed X/Y/Zmm/min5-8000
Rapid traverse 
Rapid traverse 
speed W
Feeding speed
Precision standard VDI/DGQ3441
OthersVertical ram sectionmm500*500/600*600
CNC system SIEMENS 840DSL or other CNC system

Standard configuration:
Direct-connected spindle with two-stage reduction box 
X-axis static pressure guide
X-axis mechanical backlash eliminating
Planet reducer
W-axis double grating scales synchronous drive
Fixed displacement multi-stage pump
Hydraulic pressure station
Static pressure oil feeding box
Electric tank with air condition
Guide protection
Chain-type chip removal machine
Spindle oil cooler
Oil cooler for oil feeding tank
Centralized automatic lubrication system
Optional configuration:
FANUC 0i-MD CNC system
FANUC 31i-MB CNCsystem
Whole-wrapped square ram with static pressure
X-axis double gear and rock elctric control for the backlash elimination
Y-axis double gear and rock electric control for the backlash elimination
Vertical tool magazine 
Vertical and horizontal tool magazine 
Accessory milling heads
Accessory milling head grabbed automatically
Attachment head loss prevention system
Flat right-angle milling head 
Universal milling head 
Right-angle milling head 
Extended milling head
Manual/semi-auto./fully-auto 90 degree milling head 

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