日常模具生产中，应注意维护冲切凸、凹模刃口的锋利度。当冲切刃口磨损时，材料所受拉应力将增大，从而冲压件产生翻料、扭曲的趋向加大。Indailymoldproduction,attentionshouldbepaidtosharpnessofpunchingandconc***edieedges.Whenthecuttingedgeisworn,thetensilestressofthematerialwillincrease,andthestampingandbendingwillincrease.在冲压件行业里，冲压有时也称板材成形,但略有区别。所谓板材成型是指用板材、薄壁管、薄型材等作为原材料进行塑性加工的成形方法统称为板材成形，此时，厚板方向的变形一般不着重考虑。Inthestampingindustry,stampingissometimesreferredtoassheetmetalforming,butthereisaslightTheso-calledsheetformingmeanstheformingmethodofplasticformingwithsheet,thin-walledtubeandthinmaterialasrawmaterial,whichiscalledsheetforming.Atthistime,thedeformationofthethickplateisgenerallynotcidered.手锯锯削的注意事项锯条的松紧要合适，且锯割时压力不能太大，以防折断伤人；当锯缝歪斜时，不可急于纠正，而需要慢慢地逐步纠正。NoticeofhandsawcuttingThetightnessofthesawbladeshouldbesuitable,andthepressureshouldnotbetoolargeduringsawing,soastopreventbreakingandhurtingpeople.WhentheSAWseamisskewed,itcannotbecorrectedinahurry,butitneedstobecorrectedgradually.)