| 摘要 |
PURPOSE:To improve grinding work efficiency by driving a table of a grinding machine by means of a linear motor, performing grinding work by making the table vibrated in perpendicular directions caused by the variation in the feeding speed of the table, and performing elastic fluid lubrication process on a rugged surface formed by the grinding. CONSTITUTION:When a table 5 of a surface grinder is driven with a linear motor 13 to perform grinding work with a grindstone on a workpiece W fixed with a magnetic chuck 7, the table 5 vibrates due to the variation in the feeding speed of the table in the directions perpendicular to the table feed to cause a phenomenon of forming a rugged surface on the ground surface. This ruggedness consists of a large ruggedness Wa and smaller ruggedness Wb. When the speed is small, a distance between the rugged surfaces Wa becomes narrower as Wd and when the speed is great, the distance becomes wider as Wc. On the other hand, ruggedness Wb is caused by the variation in the torque of the torque motor 13. An elastic fluid lubrication process is then applied on the rugged surface of the workpiece W. Thus, a bearing guide surface can be ground easily and accurately within a short period of work time without the need for scrapping work.
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