我厂在试制按部颁标准设计的新系列机械滑台时,自行设计、制造了一台用于粗加工机械滑台传动箱体的HB—U001三面卧式钻镗组合机床(该机床的外观照片刊登在本刊今年第二期封面上——编注)。被加工零件见图1。为了保证各孔的相对位置精度,机床左、右主轴箱上的三根主轴对三个中心距为70毫米的轴承孔以及与它们同心的两段半径R=56毫米和一段半径R=80毫米的圆弧在一次工作循环中同时加工出来。由于轴间距小,而要加工的圆 Our factory designed and manufactured a new series of HB-U001 three-face horizontal drilling and boring combined machine for the roughing mechanical sliding table transmission case Photos published in the second issue of this year’s cover - compilation). The parts are shown in Figure 1. In order to ensure the relative position accuracy of each hole, the three spindle on the left and right spindle headstocks have three bearing holes with 70 mm centers and two concentric radii R = 56 mm and a radius of R = 80 mm The arc is machined simultaneously in a work cycle. Because of the small shaft spacing, but to be processed circle