单向和双向推力角接触球轴承（图1.50和1.51）都用机床主轴轴向刚性作为指导。
Single-direction and double-direction angular contact thrust ball bearings (Figures 1.50 and 1.51) are used for machine tool spindles requiring rigid axial guidance.
结果表明，在一定工作空间范围内，主动冗余支链可以显著提高并联机床的刚性。
The results show that in certain range of the workspace, active redundant leg can increase stiffness of PKM significantly.
铸件经过严格的人工时效和振动时效，确保了机床的刚性、稳定性。
Casting pass by strict artificial aging and vibration aging so as to make sure the rigidity and stability of lathe.
机床整体钢结构焊接，经震动时效处理，不变形，刚性好。
Overall steel welding machine, the vibration aging treatment, deformation and rigidity.
机床机身、送料。进给拖板等均为铸铁件，刚性高。具有吸振、抗震性好等优点。
The body, charge and feed slides, and other components of the machine tool are made of iron castings, which have high rigidity, good vibration absorbency, earthquake resistance, and other advantages.
机床整体床身重，同时床身制造过程中采用二次淬火工艺，从而改变了铁的内部结构，使之更加耐冲压，刚性上有显著提高。
Tempering of the machine bed is carried out twice to ensure stability. The tempering process changes the internal structure of the iron making it more durable and rigid.
采用金属铸造件机身，刚性好，运行平稳，机床整体振动小；
Metal casting body, which assures great rigidity, moving stable and few vibration for machine body;
进给传动：三向进给均采用交流伺服电机驱动精密滚珠丝杆，专用丝杆轴承支承，提高了机床的进给运动刚性和精度。
Feed transmission: using AC servo motor to drive the precise ball screw sets that supported by special ball screw bearing, which improves the rigidity and precision of feed movement.
龙门立柱均采用整体金属铸造件，刚性好，运行平稳，机床整体振动小；
Whole metal casting for gantry and standing, great rigidity, moving stable and few vibration;
经加工试验表明，改造后的铣齿机扩大了加工范围，增强了刚性，大大提高了机床性能，具有很高的性价比和实用性。
The new machine is proved to enlarge the range of the machining, improve the rigidity and the performance with high value and practicability.
主机床身采用C型框架保证了最佳的刚性，为操作维护等提供了最佳的可及性。
The machine body is a C-frame with the highest rigidity and the best possible access for the operator and automation.
本机床采用液压传动，机架为钢板焊接结构，有足够刚性和强度。
The machine is hydraulically driven and structure with steel welded plate. This structure has enough ridged.
本机床采用液压传动，机架为钢板焊接结构，有足够刚性和强度。
The machine is hydraulically driven and structure with steel welded plate. This structure has enough ridged.
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