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对于大半径(R>1000毫米)的圆弧,通常需在大型立式车床上加工。在受到设备限制时,可用中、小型立式铣床加工。此时,只能按照划线进行手工操作,不仅要求操作者有较高的技术水平、工件的锉修工作量大,加工精度也难以符合要求。若用数控机床进行插补加工,一则数控机床尚未普及,二则受储存器位数的限制,加工半径也不能过大。最近,我们工具车间需要制造一副成形冲压模具,有些圆弧半径较大(1870～5000毫米),而车间又没有大型机床,经研究、试验、找到了一种在中、小型立式铣床上加工大圆弧半径的方法。下面以一段半径为5000毫米、中心角为5°30′的圆弧为例,
For large radius (R> 1000 mm) of the arc, usually large-scale vertical lathe machining. When limited by the equipment, available medium and small vertical milling machine processing. At this point, only in accordance with the crossed manual operation, not only requires the operator to have a higher technical level, the workpiece file repair workload, processing accuracy is difficult to meet the requirements. If CNC machine tools for interpolation processing, a CNC machine has not yet been widely used, the second is limited by the number of memory bits, the processing radius can not be too large. Recently, we need to create a tooling workshop forming stamping die, and some arc radius larger (1870 ~ 5000 mm), and the workshop there is no large machine tools, the research, test, found a medium and small vertical milling machine Method of machining large arc radius. Below a section of a radius of 5000 mm, the center angle of 5 ° 30 ’of the arc, for example,