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本厂一部75毫米立式钻床,已使用二十多年,齿轮磨损严重,传动部件松动,用它来镗孔,精度和效率都很差。最近我们想办法对这台旧机床进行改进,使它能满足生产需要。此钻床用来镗孔的直径由(?)30～200毫米,悬臂伸长0.6米,加工长度最大近300毫米。若在此钻床镗孔只能缓慢进行,转速由44至64转/分,光洁度▽3,公差很难保证,而且极易振动。我们首先解决振动问题,并分几步进行工艺改进。1)检查机床发现主轴上的滚动轴承外圈与进给箱体已磨损。决定镗大该孔再打入
The factory a 75 mm vertical drilling machine, has been used for more than 20 years, serious gear wear, loose transmission parts, use it to boring, accuracy and efficiency are poor. We recently thought of ways to improve this old machine so that it can meet production needs. This drilling machine used to boring the diameter of (?) 30 ~ 200 mm, 0.6 m cantilever extension, the maximum processing length of nearly 300 mm. If this boring machine drilling can only be slow, speed from 44 to 64 rev / min, finish ▽ 3, the tolerance is difficult to guarantee, and extremely easy to vibration. We first solve the vibration problem, and process improvements in several steps. 1) Check the machine tool found on the spindle bearing outer ring and feed box has worn. Decided to boring a large hole and then into