大口径厚壁无缝钢管热挤压过程中挤压力的求解  

Solution of extrusion force during hot extrusion processes for large caliber thick wall seamless steel tube

作　　者：惠恬静 雷步芳[1,2] 贾璐[1,2] 李永堂[1,2] 

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]金属材料成形理论与技术山西省重点实验室,山西太原030024

出　　处：《塑性工程学报》2017年第4期110-116,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51675361);山西省回国留学人员科研资助项目(2015-086);山西省重点学科建设经费资助及校研究生科技创新项目(2016XC10)

摘　　要：分别采用了主应力法、功平衡法以及上限法推导了大口径厚壁无缝钢管在挤压过程中挤压力的3种计算公式,并且利用有限元模拟法对大口径厚壁无缝钢管挤压力进行了模拟计算。与有限元计算相比较,主应力法和上限法计算结果的平均相对误差分别仅为7.70%和7.61%,表明这两种公式具有一定的工程适用性;功平衡法计算结果的平均相对误差较大,但若取理论计算结果除以120%后的值,再与模拟结果作比较,则平均相对误差可降至3.18%,仍可精确预测大口径厚壁无缝钢管挤压力。Three types of theoretical calculation formulas of extrusion force for large caliber thick wall seamless steel tube were deduced by means of slab method,balanced work method and upper bound method and then the extrusion force of large caliber thick wall seamless steel tube was calculated by FEA method. Compared with the FEM results,the average relative errors of the calculated results obtained by slab method and upper bound method are about 7. 70% and 7. 61% respectively,which means that these two formulas can be used in certain engineering fields. The average relative error of calculated result obtained by balanced work method is too large compared with that of FEM results,but if the above calculated result is divided by 120%,the average relative error will fall to 3. 18%,so this method still can accurately predict the extrusion force of large caliber thick wall seamless steel tube.

关 键 词：大口径厚壁无缝钢管 挤压力 主应力法 功平衡法 上限法 

分 类 号：TG371[金属学及工艺—金属压力加工]