1. Basic parts: Bed, column, table, carriage, spindle head are all adopt the premium casting iron which throughs the aging treatment. Adopt the FEM to get the highest rigid. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is big section with reinforce steel rod at the cross & vertical section.
2. Guideways: The guideways of the X/Y/V and Z axes are all compound guideways (sliding guideways with plastic inserts combined with guideways with rollers ). The contact between roller and guideway are steel strip inserts.U axis is imported preload higy rigid liner guideway.
3. The table guideway adopt the cast iron plus polytef, the double cylinder roller bearing can ensure the stability of the movement, positioning accuracy and loading capacity. The rotation measurement feedback has the Heidenhain circular grating scale close loop control. The table drive structure is floating small gear drive big gear ring which can eliminate the driven backlash.
4. Spindle triple structure consists of the boring spindle milling spindle. Adopting the imported bearing and disk spring clamping hydraulic loose method; Material of the spindle is 38CrMoAlA which is electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
5. The boring spindle (spindle)’s rotation realized by the Siemens 1PH7 adjustable-speed spindle motor which power through the gear box to the hollow spindle then to the boring spindle. The gear box has two-step hydraulic speed change with wide range, high output torque. Meanwhile the spindle head adopt the constant oil cycle cooling method to ensure the precision of the boring spindle and rotation reliability also decrease the heat transformation of the spindle.
6. Feed mechanism of liner motion: X, Y, Z, W feed mechanism adopts a servo motor and deceleration mechanism, which drives the imported high rigidity preloaded ball screw to realize the feed of each coordinate axis. The structure has the characteristics of reasonable and compact transmission, high transmission efficiency and transmission accuracy. And the Y-axis servo motor has a brake function to prevent the spindle box from falling when the power is unexpectedly cut.
7. Balancing unit:
1) Directional weight balancing unit can guarantee the stability of spindle head vertical movement.
2) Balance compensation of machine tool ram: The balance compensation of machine tool ram adopts servo eccentric compensation mechanism. The mechanism adopts Siemens servo feed motor to drive the eccentric shaft mechanism located at the front end of the ram seat and the lower end of the square ram after deceleration. Under the eccentric action of the eccentric shaft, the front end of the ram is pushed up to achieve compensation. The compensation mechanism can perform numerical control automatic compensation according to the deflection curve generated by the displacement of the ram. At the same time, in order to prevent the bottom rail of the ram from being scratched by the compensation mechanism during the compensation process, a double rolling element unit from the German INA company is installed at the contact between the compensation mechanism and the ram.
8. Lubrication: the driven gear, bearing of spindle head is all lubricated by the mechanism oil. The guideway and screw rod are lubricated by the timing lubrication pump which guarantee the sound effect.
9. Guideway protection: the rear and front bed’s guideway (Z and X axis) are all use telescope cover and for the column guideway (approach the spindle) Y axis is armor protection cover.
Spindle diameter: Φ160mm;
Worktable size: 2000x2000mm
Worktable travel (X): 2000 mm (Optional 3000/4000mm)
Headstock vertical travel (Y): 2000mm (Optional 1600/2500/3000mm)
Column travel (Z): 2000mm (Optional 1600/2500/3000mm)
Spindle axial travel (W): 800mm
Ram travel (V): 800mm