钢轨铝热焊预热控制系统的研究与应用
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摘要
为了降低钢轨铝热焊焊前预热过程中人为操作对焊接接头性能的影响,采用一种基于PLC控制器的预热控制系统对预热过程中预热气体的流量进行调节与监控。该系统可实时监测、控制钢轨铝热焊预热过程中气体的流量参数,并充分量化预热控制过程中的预热参数指标。经型式检验,该系统的静弯、疲劳、拉伸、硬度及显微组织试验结果满足标准要求。该系统已成功应用于高原槽型轨铝热焊接试验中。
In order to reduce the influence of human factors on the performance of welded joints during preheating of thermite welding,a preheating control system based on PLC controller is used to monitor the preheating gas flow during the preheating process. The system can monitor and control the gas flow parameters on time and fully quantify the preheating parameters index during the preheating control process. Through type test,the results of static bending,fatigue,stretch,hardness and micro-structure of this system satisfied the requires of standard. And this system successfully applied to the groove rail thermite welding test on the plateau.
In order to reduce the influence of human factors on the performance of welded joints during preheating of thermite welding,a preheating control system based on PLC controller is used to monitor the preheating gas flow during the preheating process. The system can monitor and control the gas flow parameters on time and fully quantify the preheating parameters index during the preheating control process. Through type test,the results of static bending,fatigue,stretch,hardness and micro-structure of this system satisfied the requires of standard. And this system successfully applied to the groove rail thermite welding test on the plateau.
引文
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[2]冯子凌,崔成林,杨艳玲.热处理对贝氏体钢轨和珠光体钢轨铝热焊接头性能的影响[J].铁道建筑,2016,56(10):116-120.
[3]张伟娜,林哲,谭毅.预热时间对钢轨铝热焊焊缝组织和力学性能的影响[J].机械工程材料,2008,32(4):16-76.
[4]高松福,崔成林,周清跃,等.钢轨铝热焊轨缝间隙对接头性能的影响[J].机械工程材料,2011,35(9):39-41.
[5]岳峥.钢轨铝热焊接工艺及日常管理[J].科技信息,2011(11):32.
[6]谢敏,冯鉴,雷代明.钢轨铝热焊缺陷的研究与防止[J].西南民族大学学报:自然科学版,2006,32(2):340-341.
[7]高松福,崔成林,迟俊杰,等.铁科院ZTK-Ⅰ型60 kg·m-1钢轨铝热焊接材料的研制[J].中国铁道科学,2008,29(6):135-140.
[8]中国工程建设标准化协会.CECS 430:2016城市轨道用槽型钢轨铝热焊接质量检验标准[S].北京:中国计划出版社,2016.