锻压技术

卷曲式JCOE成形焊管复合模具设计

英文标题：Design on composite mold for coiled JCOE forming welded pipe

作者：刘庆才1 2

单位：1.广州铁路职业技术学院机电工程学院 2. 番禺珠江钢管集团有限公司研发中心

分类号：TG305

出版年,卷(期):页码：2024,49(10):184-188

摘要：

针对卷曲式JCOE成形焊管成形过程中存在的钢板滑动、板边未预弯、钢板变形导致难以进入钳口及成形芯轴尺寸不合理等工艺问题，研究设计了板边预弯和成形复合模具。运用钢板弯曲的弹塑性变形理论，给出了预弯力和复合模具参数计算方法，进一步考虑加工硬化对钢管成形过程的影响，并结合相关文献给出的硬化指数，计算了钢级从X42到X70管线钢的性能参数B值，得到了考虑加工硬化的模具参数计算方法。使用两种方法求得不同屈服强度等级和不同规格钢管的预弯力和模具参数，并与实际工艺的模具参数进行对比。结果表明:在不考虑加工硬化的条件下，计算结果和实际模具尺寸的最大偏差为1.1%;在考虑加工硬化的条件下，计算结果和实际模具尺寸的最大偏差为-0.9%，且所有计算结果均略小于实际工艺的模具参数。结合实际生产情况，考虑加工硬化的模具参数计算结果更加准确。

For the process problems of steel plate sliding, without pre-bending of plate edge, difficulty in entering the jaws due to steel plate deformation and unreasonable dimensions of forming core shaft in the forming process of coiled JCOE forming welded pipes, a composite mold of pre-bending and forming for plate edge was studied and designed，and using the elastic-plastic deformation theory of steel plate bending, a calculation method for pre-bending force and composite mold parameters was proposed. Then, the influence of work hardening on the steel pipe forming process was further considered, and combined with the hardening index provided in relevant literature, the performance parameter B value of pipeline steel grades from X42 to X70 was calculated, and the mold parameter calculation method considering work hardening was obtained. Furthermore, the pre-bending force and mold parameters of steel pipes with different yield strength grades and specifications were obtained by two kinds of methods, and compared with the mold parameters of actual process. The results indicate that without considering work hardening, the maximum deviation between the calculated results and the actual mold sizes is 1.1%. Under the condition of considering work hardening, the maximum deviation between the calculation results and the actual mold sizes is -0.9%, and all calculated results are slightly smaller than the mold parameters of actual process. Thus, considering the actual production situation, the calculation results of mold parameters considering work hardening are more accurate.

基金项目：

广东省高校科技创新项目（2019GKTSCX077）

作者简介：刘庆才（1969-），男，博士，高级工程师，教授,E-mail：807431278@qq.com

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