螺丝计算

重量计算公式； 

          圆柱体重＝直径＊直径＊高＊ 0.0062        

          四角体重＝长＊宽＊高＊0.00785                  

          六角体重＝对边＊对边＊高＊ 0.866        

          遇到其它材料的计算公式：                    

         铝＝铁重＊0.00275     白铁＝铁重＊1.05         

         黄铜＝铁重＊1.08      红铜＝铁重＊1.14      

         矽铜＝铁重＊1.10                                            

        牙底径和碾造径算法：                                  

         算法一：（1）         

        公制：H=0.866025*P­

                    H1=0.541266*P        

        碾造直径公式：           D－（0.1443*p＋0.6495*p)                        

        例如：M4－0.7             3.95－（0.1443*0.7＋ 0.6495*0.7）＝3.4       

                                                                                                                                                                             备注：钢牙螺丝取其牙距2/3                   

     英制：                          H=0.866025/nn*25.4                                         H1=0.541266/nn*25.4                                     D2=D－0.640519/nn*25.4                              D1=D－1.082532/nn*25.4                             

      线径：D－（0.13733*P＋0.6433*p)            

      例如：5/32－32        3.96－（0.13733*0.79＋0.6433*0.79）＝3.34                            

        H:牙峰高度；P:牙距；H1:实用牙高；D2:中径；D1:实用牙底径；D:名称径；三：中径：                      D2=d2                           d2=D－2*3H/8             H= 0.866025p(60度牙山）         H=0.960491P（55度牙山）           例如：M6－1.0             6－（0.866025*3*2）/8=5.28­

     .螺丝单重：（头大+头厚+长度）*线径*线径*0，00617