φ450毫米以上大口径光学平面的一次成型铣磨技术,以前在国内是个空白,除了缺乏这种大型铣磨机床之外,更主要的是没有这种大型的金刚石砂轮,使大口径光学平面的粗磨工作一直沿用半手工式的古典法加工。一九七四年,我们把上海机床厂生产的7475B圆台磨床改装为大型平面铣磨机,研 φ450 mm large diameter optical plane forming milling technology, previously in the country is a blank, in addition to the lack of such a large milling machine, the more important is that there is no such a large diamond wheel, the large-diameter optical surface roughness Grinding work has been used semi-manual classical method of processing. In 1974, we transformed the 7475B rotary table grinder produced by Shanghai Machine Tool Plant into a large-scale surface milling machine.