模具零件机加工前必须划线以确定零件的加工余量，及时发现和处理不合格的坯件，避免加工造成损失，平面机加工出现的问题较少，偶尔出现的机加工问题一般都是图纸尺寸错误或NC机床操作者的失误，如导柱导套位置出错导致合模后偏磨、导向面加工错误、安装平台加工失误、凸模和凹模出现偏心、上模和压料板侧销安装位加工错位、起吊孔加工错位、模具安装相关定位或锁紧位置加工错误等。
Before machining die parts, it is necessary to mark out to determine the machining allowance of the parts, find and deal with the unqualified blanks in time to avoid the loss caused by machining. There are few problems in plane machining, and the machining problems that occasionally occur are generally the drawing size error or the error of NC machine operator, such as the guide post guide sleeve position error leading to eccentric wear after closing the die, the guide surface processing error and safety The processing error of platform installation, eccentricity of punch and die, processing dislocation of side pin installation position of upper die and pressing plate, processing dislocation of lifting hole, processing error of relevant positioning or locking position of die installation, etc.
导柱导套位置错误造成不同心而偏磨，甚至会造成导柱导套严重磨损及导套开裂，影响模具精度。导柱导套不同心的严重程度可以借助红丹凭经验判断，严重的偏心一般是将导柱或导套安装孔扩孔加装套，但再扩孔时，模具零件要上NC机床重新定位，二次定位出现偏泥杆 保定古筝 塑料增韧剂 拱形护坡模具 保定空调维修  托辊生产线差的概率大，一旦再出现问题，再扩孔可能出现局部壁厚不足。
The wrong position of the guide sleeve of the guide pillar results in eccentric wear and even serious wear of the guide sleeve of the guide pillar and cracking of the guide sleeve, which affects the accuracy of the die. The severity of the eccentricity of the guide post and guide sleeve can be judged by red lead's experience. The serious eccentricity is generally that the guide post or guide sleeve installation hole is enlarged to add a sleeve, but when re expanding the hole, the mold parts need to be relocated on the NC machine tool, and the probability of the deviation in the secondary positioning is large. Once the problem occurs again, the re expanding may result in partial wall thickness shortage