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.槽钢的锯削：槽钢的锯削与扁钢一样，但是要分二次从宽边面往下锯，不能在一个面上往下锯，应尽量做到在长的锯缝口上起锯，因此工件必须多次改变夹持的位置。Channelsteelsawing:thechannelsawingofthechannelsteelisthesameasthatoftheflatsteel,butitmustbesaweddowntwotimesfromthewideside,andcannotbesaweddownononesurface,andshouldbesawedonthelongsawmouthasfarassotheoftheclampingmustbechangedmanytimes.薄板：锯削时尽可能从宽面锯下去，若必须从窄面锯下时，可用两块木垫夹持，连木块一起锯下，也可把薄板直接夹在虎钳上，用手锯作横向斜推锯，使锯齿与薄板料接触的齿数增加，避免锯齿崩裂。Thinplate:sawingasfarasaswideaswhensawing.Ifmustbesawedfromnarrowsurface,itcanbeheldbytwowoodenblocksandsawedtogetherwithwoodenblocks.Thesheetcanbeclippeddirectlytothevise,andahandsawisusedasatransverseobliquesawtoincreasethenumberofteethcontactedwiththesheetmaterialand***oidthecrackofthesawteeth.)