由于司机室特殊的框架结构以及铝合金材料在焊接中易产生各种焊接缺陷的特点,在200km/h EMU司机室生产中,骨架和外皮板的段焊焊后出现大面积的裂纹,给产品质量带来隐患,而焊后的补修效果也不好,并在一定程度上影响了生产进度。通过在生...由于司机室特殊的框架结构以及铝合金材料在焊接中易产生各种焊接缺陷的特点,在200km/h EMU司机室生产中,骨架和外皮板的段焊焊后出现大面积的裂纹,给产品质量带来隐患,而焊后的补修效果也不好,并在一定程度上影响了生产进度。通过在生产中的不断摸索,创立了一种新的焊接操作手法——推焊法,该方法在300 km/h EMU的生产中取得了良好的效果。展开更多
针对200km/h EMU铸钢轴箱体存在的缩松、裂纹铸造缺陷问题,采用铸造模拟软件MAG-MASOFT对铸件的充型、凝固过程进行了温度场、流场的模拟计算,获得了优化的轴箱体铸造工艺方案,消除了200 km/h EMU轴箱体惯性缩松及裂纹问题。优化的铸造...针对200km/h EMU铸钢轴箱体存在的缩松、裂纹铸造缺陷问题,采用铸造模拟软件MAG-MASOFT对铸件的充型、凝固过程进行了温度场、流场的模拟计算,获得了优化的轴箱体铸造工艺方案,消除了200 km/h EMU轴箱体惯性缩松及裂纹问题。优化的铸造工艺,其工艺稳定性好,批量生产铸件成品率达到了95%以上,大大降低了铸件的制造成本。展开更多
This paper makes an analysis of the impact on the structure of the corridortype train working diagram by increasing the 350 km/h train pairs of Beijing-Shanghai High-speed Railway(HSR).According to the requirements of...This paper makes an analysis of the impact on the structure of the corridortype train working diagram by increasing the 350 km/h train pairs of Beijing-Shanghai High-speed Railway(HSR).According to the requirements of operation speed diversity,the multi-station receiving characteristics of cross-line trains and different train stopping schemes,this paper proposes a scheme of adding 350 km/h train pairs via computer analysis of carrying capability mode.The scheme is divided into three stages:(1)Initial stage:It is planned to increase trains running at 350 km/h,with 15~26 pairs of trains put into operation;(2)Rapid increase stage:27~142 pairs of 350 km/h trains are put into operation;(3)Full replacement stage:143~195 pairs of 350 km/h trains are put into operation,during which the number of cross-line trains under operation is controlled,the number of cross-line trains in each section is determined,the operation and connection scheme of cross-line trains is adjusted and the train stopping scheme is optimized.The results of this study were used for the adjustment of the train working diagram in the third quarter of June 25,2021 to increase the number of 350 km/h train pairs from 19 to 30 on Beijing-Shanghai HSR.350 km/h trains are evenly arranged during 7:00—19:00 on the train working diagram and 300 km/h trains are arranged by making full use of every time and space,to improve the travelling speed on Beijing-Shanghai HSR as a whole.展开更多
文摘由于司机室特殊的框架结构以及铝合金材料在焊接中易产生各种焊接缺陷的特点,在200km/h EMU司机室生产中,骨架和外皮板的段焊焊后出现大面积的裂纹,给产品质量带来隐患,而焊后的补修效果也不好,并在一定程度上影响了生产进度。通过在生产中的不断摸索,创立了一种新的焊接操作手法——推焊法,该方法在300 km/h EMU的生产中取得了良好的效果。
文摘针对200km/h EMU铸钢轴箱体存在的缩松、裂纹铸造缺陷问题,采用铸造模拟软件MAG-MASOFT对铸件的充型、凝固过程进行了温度场、流场的模拟计算,获得了优化的轴箱体铸造工艺方案,消除了200 km/h EMU轴箱体惯性缩松及裂纹问题。优化的铸造工艺,其工艺稳定性好,批量生产铸件成品率达到了95%以上,大大降低了铸件的制造成本。
文摘This paper makes an analysis of the impact on the structure of the corridortype train working diagram by increasing the 350 km/h train pairs of Beijing-Shanghai High-speed Railway(HSR).According to the requirements of operation speed diversity,the multi-station receiving characteristics of cross-line trains and different train stopping schemes,this paper proposes a scheme of adding 350 km/h train pairs via computer analysis of carrying capability mode.The scheme is divided into three stages:(1)Initial stage:It is planned to increase trains running at 350 km/h,with 15~26 pairs of trains put into operation;(2)Rapid increase stage:27~142 pairs of 350 km/h trains are put into operation;(3)Full replacement stage:143~195 pairs of 350 km/h trains are put into operation,during which the number of cross-line trains under operation is controlled,the number of cross-line trains in each section is determined,the operation and connection scheme of cross-line trains is adjusted and the train stopping scheme is optimized.The results of this study were used for the adjustment of the train working diagram in the third quarter of June 25,2021 to increase the number of 350 km/h train pairs from 19 to 30 on Beijing-Shanghai HSR.350 km/h trains are evenly arranged during 7:00—19:00 on the train working diagram and 300 km/h trains are arranged by making full use of every time and space,to improve the travelling speed on Beijing-Shanghai HSR as a whole.
