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1、精选优质文档-倾情为你奉上轧制力的计算1. 校核咬入条件第一道次: h = 2(R-Rcos)又 h = FHB - Fhb = (150*150)/150 - (150-5+165.75)*1052 /165.75 = 51.2mm = arccos(1-h 2R) = arccos(1-51.2/500) = 25.8 tan 即 tan25.8 = 0.48故 可以顺利自然咬入。2. 轧制力的计算轧制压力:P= PF P 平均单位压力 F 接触面积 F = B+b2h R P =(1 + m)(K+ )B 、b 轧件轧制前与轧制后宽度h 压下量 R 轧辊半径m 外摩擦对单位轧制压力影响系
2、数 粘性系数K 化学成分修正系数 平均变形速度第一道次计算:F = B+b2h R = 150+165.75251.2*250 = 17861.52 mm2取a = 0.8f = a(1.050.0005t)= 0.8*(1.05-0.0005*1150)= 0.38查资料 取v = 8 ms 故 C= 0.8 = 0.1(140.01t)C = 0.1(14-0.01)*0.8 = 1.12 Mpas = 2VhR (H+h) = 2*8*51.2250 / (150+105)= 0.028K = 9.8(14-0.01T)(1.4+C+Mn) = 9.8*(14-0.01*1150)*(1
3、.4+0.2)= 34.35 Mpam = ( 1.6 Rh ) - 1.2h / (H+h) = ( 1.6 *0.3651.2250 ) - 1.251.2 / (150+105) = 0.015 P =(1 + m)(K+ ) =(1 + 0.015)(34.35+ 1.12*0.028)= 34.90 P= PF = 34.90 * 17861.52 = 623.37 kN同理第二道次计算:F = B+b2h R = 105+115.0723.14*250 = 3082.94 mm2取a = 0.8f = a(1.050.0005t)= 0.8*(1.05-0.0005*1150)=
4、0.38查资料 取v = 8 ms 故 C= 0.8 = 0.1(140.01t)C = 0.1(14-0.01)*0.8 = 1.12 Mpas = 2VhR (H+h) = 2*8*3.14250 / (105+115.4)= 0.01K = 9.8(14-0.01T)(1.4+C+Mn) = 9.8*(14 - 0.01*1150)*(1.4+0.2)= 34.35 Mpam = ( 1.6 Rh ) - 1.2h / (H+h) = ( 1.6 *0.363.14250 ) - 1.251.2 / (105+115.4) = 0.056 P =(1 + m)(K+ ) =(1 + 0.
5、056)(34.35+ 1.12*0.01)= 36.28 P= PF = 111.85 kN 其他道次如上,故可得: P1 = 623.37 kN P2 = 111.85 kN P3 = 418.1 kN P4 = 333.03 kN P5 = 528.62 kN P6 = 210.82 kN P7 = 360.45 kN P8 = 152.64 kN P9 = 172.96 kN P10 = 69.54 kN P11 = 81.79 kN P12 = 44.77 kN P13 = 78.56 kN P14 = 20.39 kN P15 = 59.05 kN P16 = 34.28 kN专心-专注-专业