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在仪器仪表中,有许多板类零件,它们要求很高的孔径、孔心距精度和高的光洁度(尺寸精度2～3级,表面光洁度7～8级),用普通冲裁方法无法达到。一般只得采用机械加工:或冲孔后铰孔;或钻孔后铰孔;孔心距要求高的还要座标镗加工。生产效率低,很不经济。若采用“精密整修法”则是比较理想的加工方法。尤其对于孔的数量多、精度高、孔距要求严的一、成组夹板孔的精密整修特点用普通冲裁法冲制的孔所能达到的经济精度,一般为6级以下的尺寸精度、5级以下的
In the instrumentation, there are many board parts, they require high aperture, hole pitch accuracy and high finish (dimensional accuracy of 2 to 3, the surface finish of 7 to 8), with ordinary stamping methods can not be achieved. Generally have to use mechanical processing: or after reaming hole; or reaming after drilling; hole center distance requires high coordinates boring processing. Productivity is low and uneconomical. If the use of “precision renovation law” is the ideal method of processing. Especially for the large number of holes, high precision, strict spacing requirements A group of plywood hole precision renovation features Punched ordinary hole punching can achieve economic precision, usually 6 below the dimensional accuracy, Below the 5th level