ーーーーp＝ℓ×t×fー32404556729010055ー313.8392.3441.3549.2706.1882.6980.7539.4 lacnhceTataDs・tcudorPーーiSS〔Reference〕高木六弥著：金型工作法 Nikkan Kogyo Shimbun Ltd. 40ー313.8～372.755～60 32 40 48 56 72 90105 56 56ーーー637.4～686.5431.5～409.324.5～39.239.2～4978.5～117.713～18 38 2025～3035～4040～6045～56255147.1215.7～274.6274.6～343.2392.3～490.3343.2～441.3The example of button die with shearing angle, which mainly for blanking. 45ー32～38588.4～686.560～70 40 50 60 72 90110130 65ー392.3490.3588.4706.1882.61078.71274.9637.4ー65～7044～502.5～44～58～122615559～617.857～63166.7～215.717～22 48 2530～4040～6050～7555～70470.7245.222～2828～3540～5035～45294.2～392.3392.3～588.4490.3～735.5539.4～686.5 The punching force is：for flat tip（shaped hole） punch and button die, refer to the following formula. p：Punching force ℓ：punching profile length t：work piece thickness（mm） f：Shearing resistance of material（Kg/mm2） The shearing resistance of material is depended on the shape of shearing surface, which may be instead by the tensile strength for safety purpose with preventing the breakage of punch tip. Iron plateIron plate for deep drawingSteel plateSteel 0.1%CSteel 0.2%CSteel 0.3%CSteel 0.4%CSteel 0.6%CSteel 0.8%CSteel 1.0%CSilicon steel plateStainless steel plateNickelLeadTinAluminumDuraluminZincCopperBrassBronzeSilverPunching forceShearing Resistance and Tensile Strength of Various MaterialsMaterialN/mm2313.8Shearing angleFor minimum the punching force, the shearing angle may remain on the tip（shaped hole） of punch or button die for shearing. Normally, the shearing angle S is 1～2 times thicker than the work piece.294.2～343.2441.3～490.319.6～ 29.429.4～ 39.268.6～107.9The example of punch with shearing angle, which mainly for piecing.Shearing resistance（Kg/mm2）SoftHardkgf/mm2N/mm2392.3ー3230～3545～50539.4～588.4245.2313.8353441.3549.2706.1784.5441.3509.9245.2253236455672804552252～ 33～ 47～112212313.8392.3470.7549.2706.1882.61029.7549.2549.2ーーー127.5～176.5215.7117.7176.5215.7313.8274.6372.7196.118～2222～3032～4028～36245.2～294.2343.2～.92.3392.3～588.4441.3～549.2Tensile strength（Kg/mm2）HardSoftkgf/mm2N/mm2kgf/mm2N/mm2441.3ーkgf/mm21121Shearing Resistance and Tensile Strength of Various Materials
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