热轧轧制力计算及校核

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1、.-6轧制力与轧制力矩计算6.1轧制力计算6.1.1计算公式1.S.Ekelund公式是用于热轧时计算平均单位压力的半经历公式，其公式为〔1〕；〔1〕式中：m——表示外摩擦时对P影响的系数，；当t≥800℃,Mn%≤1.0%时，K=10×〔14-0.01t〕〔1.4+C+Mn+0.3Cr〕Mpa式中t—轧制温度，C、Mn为以%表示的碳、锰的含量；—平均变形系数，；η—粘性系数，Mpa.sF—摩擦系数，，对钢辊a=1，对铸铁辊a=0.8；—决定于轧制速度的系数，根据表6.1经历选取。表6.1与速度的

2、关系轧制速度〔m/s〕＜66~1010~1515~20系数10.80.650.602.各道轧制力计算公式为-.word.zl.-6.1.2轧制力计算结果表6.2粗轧轧制力计算结果道次12345T〔℃〕1148.681142.761133.931117.151099.45H〔mm〕2001601126743h(mm)160112674330Δh(mm)4048452413Ri(mm)600600600600600f0.4760.4790.4830.4910.500m0.1940.2660.4080.

3、5960.755K(Mpa)64.365.968.172.476.911111η0.2510.2570.2660.2830.301v(mm/s)377037703770377037705.4087.84111.53613.70915.204(Mpa)78.585.9100.2121.8143.0(mm)162416211635.41623.91631.1-.word.zl.-(mm)16211635.41623.91631.11615P(KN)1972023743268342377820501表6

4、.3精轧轧制力计算结果道次1234567T(℃)1043.651022.38996.34967.35928.58901.31880H(mm)30.001811.78.196.144.63.91h(mm)1811.78.196.144.63.913.5Δh(mm)126.303.512.051.540.690.41Ri(mm)400400400350350350350f0.5280.5390.5520.5660.5860.5990.61m0.9201.2031.4521.5221.8541.6541

5、.511K(Mpa)91.2396.67103.34110.76120.68127.66110.80.80.650.60.6-.word.zl.-η0.3560.3780.3230.3460.3060.2990.312v(mm/s)331050807260969012930152201700023.8942.9368.38103.50159.72158.82157.04(Mpa)191.47248.63307.47369.69484.06464.92457.37(mm)1606.161606.16

6、1606.161606.161606.161606.161606.16P(KN)21307200471850515905180501160488006.2轧制力矩的计算6.2.1轧制力矩计算公式传动两个轧辊所需的轧制力矩为〔2〕；〔2〕式中：P—轧制力；x—力臂系数；l—咬入区的长度。上式中的力臂系数x根据大量实验数据统计，其围为热轧板带时x=0.42~0.50.。一般的，轧制力臂系数随着轧制厚度的减小而减小。6.2.2轧制力矩计算结果1.粗轧轧制力矩计算表6.4粗轧轧制力矩计算结果道次12345

7、-.word.zl.-Ri(mm)Δh(m)P(KN)xM(KN.m)0.60.040197200.53055.010.60.048237430.493948.730.60.045268340.484232.910.60.024237780.472682.160.60.013205010.461665.752.精轧轧制力矩计算表6.5精轧轧制力矩计算结果道次1234567Ri(m)Δh(m)P(KN)xM(KN.m)0.40.012213070.451328.570.40.0063200470.4

8、45895.650.40.00351193190.44610.180.350.00205168770.435370.650.350.00154208540.43360.390.350.00069137030.425153.280.350.00041103780.4288.55-.word.zl.-7力能参数校核7.1轧制力能参数表7.1轧辊的物理性质轧辊名称材质许用应力泊松比弹性模量〔Gpa〕工作辊F1~F3实心锻钢[σ]=120MPa0.3E=206[τ]=60MPa工作辊F4~