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苏联2A635卧式镗床是七十年代初进口,镗杆直径为φ125mm.这台机床在我厂一直担负着大件的加工任务。有一次,要镗削一台端面车床主轴箱的主轴孔,主轴箱外形尺寸为:长1700、宽1A00、高1200,镗削尺寸和安装位置如图1。由于镗杆长度及工作台运动尺寸所限,前、后主轴孔的镗削采用工作台向左、向右运动分别进行加工,见图1。当镗孔后装入轴套,用精磨后的主轴显点刮研时,发现前后主轴孔轴心线在水平面内呈八字形,误差达0.25mm.
The Soviet Union 2A635 horizontal boring machine is imported in the early 1970s, boring bar diameter φ125mm. This machine has been in our plant large-scale processing tasks. Once, it is necessary to boring a spindle bore of a face turning lathe spindle headstock. The overall dimensions of the headstock are: length 1700, width 1A00, height 1200, boring size and mounting position as shown in FIG. 1. Due to the length of the boring bar and the size of the workbench, the boring of the front and rear spindle holes is processed by the workbench to the left and the right respectively, as shown in FIG. 1. When the bored into the sleeve, the spindle after grinding grinding point grinding and found that before and after the spindle hole axis was horizontal in the figure eight, the error of 0.25mm.