文档介绍：附录
C620 lathe main axle structure transformation design
Ren Fu jun huang ru lin wang qun
Abstract: The C620 lathe main axle front bearing, changes present's D3182120 rolling bearing structure by the original sliding bearing, its principal advantage is the rigidity is good, the rotational speed is high, and revolves, the rotation precision to be high steadily, the radial direction beats small, the thermostability to be good as well as the assembly technology capability is good. Enhances the product advantageously the working accuracy and the productivity, lengthens equipment's service life, reduces the maintenance cost, raises the equipment utilization rate.
Key word: Main axle, sliding bearing, rolling bearing, lubrication
1 transformation reason l
the C620 lathe main axle front bearing is uses the sliding bearing structure, the spindle speed defined that in n max= in the 600r/min scope, this kind of bearing in high-speed cutting's situation, the bearing is extremely easy to give off heat, the temperature reaches as high as 70 oC; Sped up bearing's natural attrition obviously under this condition, thus reduced main axle's service life, causes the main axle rotation precision gradual reduction, the very great degree has affected the working accuracy and the production benefit.
Because sliding bearing's material uses ZQSn6-6-3 generally, the service plex, the axis blows grinds requests high, the technical difficulty is big, the maintenance cost is also high. Simultaneously the bearing clearance adjustment difficulty, the gap is oversized, the working accuracy reaches does not request; The gap is too small, will appear gives off heat even forms the stuffy vehicle phenomenon. is solves the above malpractice, the sliding bearing changes rolling bearing's structure before the original main axle, simultaneously enhances the spindle speed to n max=900r/min, made the obsolete equipment to enhance the rigidity and the rotation precision, raised equipment's use fa