英语翻译
#149DesignofHolePunchingDies(9)DesignoftheBackingPlate
Category:ShearFormingMarch15,2013
Aforceequivalenttothemachiningforceactingonthepunchisalsogeneratedonitsbackface.Thisforceisreceivedfromthefaceofthepunchholder,etc.
Inthecaseofapunchwithasmallcross-section,asshowninFig.1,thisforcecannotbereceivedsufficientlybythesurfaceoftheholderandthepunchmaydigintotheplate.
Inthecaseofapunchwithasmallcross-section,asshowninFig.1,thisforcecannotbereceivedsufficientlybythesurfaceoftheholderandthepunchmaydigintotheplate.InthecaseofapunchholdermaterialsuchasS50Cthatisusedwithoutheattreatment,asaguide,whentheaveragesurfacepressureonthebackfaceofthepunch(theloadperunitareawhentheforceisconsideredtobereceivedbyuniformlydistributingthemachiningforceoverthesurfaceofthepunchflange)becomesmorethan16Kg/mm2,thepunchislikelytodigintothepunchholder.