我厂在生产中加工的联接底板,其尺寸为900mm×400mm×300mm,内圆弧面R=500mm,表面粗糙度值R_α6.3。按常规工艺方法,往往是在刨床粗刨内弧面,留加工余量,然后在镗床精镗到尺寸。但是由于工件有时较大,在镗床上精加工内弧面同样有难度。为此,我们设法利用龙门刨床直接精加工内圆弧面,效 I plant processing in the production of connection floor, the size of 900mm × 400mm × 300mm, the inner arc R = 500mm, the surface roughness R_α6.3. According to conventional technology, often planer rough plane within the arc, leaving allowance, and then boring machine fine boring to size. However, as the workpiece is sometimes larger, it is also difficult to finish the arc surface on the boring machine. To this end, we have managed to use the planer direct finishing inner arc surface effect