JCO成型宽模不重叠折弯技术
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摘要
介绍一种不预弯、免扩径的JCO宽模不重叠折弯技术。该技术通过采用宽模和大步长,实现了直缝埋弧焊管的不重叠折弯成型。分析认为:足够的折弯力和满足管筒弧形设计要求的上模半径R,是实现宽模不重叠折弯的两个重要条件;采用上模半径R满足管筒弧形设计要求的模具,通过调整下模开口距离和上模下压量,实现宽模不重叠折弯,是提高管筒成型质量和效率的有效措施。
Elaborated here in the essay is a wide-die/non-overlap technique for JCO forming that is free of prebending and expanding,The said technique has brought about the formation of the LSAW pipe without subjecting to the overlap bending operation step owing to adopting the wide-die and the large stride length as well. The analysis result leads to such a conclusion that both sufficient bending force and the radius R of the upper die that meets the design requirement for the curvature of the cylindrical blank tube act as the two critical preconditions for pipe formation with the wide-die/non-overlap bending process. Quality of blank tube formation and the manufacture efficiency shall be improved by means of such measures as using die with the upper part's radius R meeting the design requirement for the cylindrical blank tube, and adjusting the opening distance of the lower die, and the screwdown amount of the upper die so as to obtain the purpose of wide-die/non-overlap bending.
Elaborated here in the essay is a wide-die/non-overlap technique for JCO forming that is free of prebending and expanding,The said technique has brought about the formation of the LSAW pipe without subjecting to the overlap bending operation step owing to adopting the wide-die and the large stride length as well. The analysis result leads to such a conclusion that both sufficient bending force and the radius R of the upper die that meets the design requirement for the curvature of the cylindrical blank tube act as the two critical preconditions for pipe formation with the wide-die/non-overlap bending process. Quality of blank tube formation and the manufacture efficiency shall be improved by means of such measures as using die with the upper part's radius R meeting the design requirement for the cylindrical blank tube, and adjusting the opening distance of the lower die, and the screwdown amount of the upper die so as to obtain the purpose of wide-die/non-overlap bending.
引文
[1]尚才众,王青峰,王昕军,等. Cr-Mo系珠光体耐热钢钢管JCO焊接工艺实践[J].钢管,2016,45(4):18-22.
[2]尚才众. JCO双面三丝自动埋弧焊生产ASTM 1035钢管焊接裂纹的控制[J].钢管,2016,45(1):45-50.
[3]尚才众,郑丽华,贾云刚,等.执行俄罗斯标准的K60管线管JCO焊接工艺实践[J].钢管,2015,44(4):44-48.
[4]彭在美,沈发楚,嵇绍伟.我国UOE/JCOE直缝埋弧焊管机组的现状及发展趋势[J].钢管,2013,42(2):1-5.
[5]冯钊棠,李鹏. JCO成型过程中钢板的变形规律研究[J].钢管,2013,42(1):18-20.
[6]王钢,李青红,胡四海. JCO成型弯曲压下量的计算[J].钢管,2013,42(4):27-31.
[7]郭宝峰,金淼,任运来,等.大口径直缝焊管UOE成形技术及发展策略[J].锻压技术,2000(3):22-25.
[8]李宏.直缝埋弧焊钢管生产线预弯工艺[J].焊管,2006,29(1):55-57.
[9]肖兵,彭必友,查五生,等.金属塑性成形理论与技术基础[M].成都:西南交通大学出版社,2013:122.
[10]高锦张.塑性成形工艺与模具设计[M].北京:机械工业出版社,2015:80,87.
[11] GB/T 9711—2011石油天然气工业管线输送系统用钢管[S].北京:中国标准出版社,2014.
[12]尚才众,贾云刚,杨森民.壁厚48 mm钢管复合坡口倒棱工艺[J].钢管,2016,45(5):77-82.
[13]尚才众,王昕军,贾云刚,等. JCO埋弧焊外防腐涂装钢管焊缝余高的控制[J].焊管,2016,39(12):59-64.
[2]尚才众. JCO双面三丝自动埋弧焊生产ASTM 1035钢管焊接裂纹的控制[J].钢管,2016,45(1):45-50.
[3]尚才众,郑丽华,贾云刚,等.执行俄罗斯标准的K60管线管JCO焊接工艺实践[J].钢管,2015,44(4):44-48.
[4]彭在美,沈发楚,嵇绍伟.我国UOE/JCOE直缝埋弧焊管机组的现状及发展趋势[J].钢管,2013,42(2):1-5.
[5]冯钊棠,李鹏. JCO成型过程中钢板的变形规律研究[J].钢管,2013,42(1):18-20.
[6]王钢,李青红,胡四海. JCO成型弯曲压下量的计算[J].钢管,2013,42(4):27-31.
[7]郭宝峰,金淼,任运来,等.大口径直缝焊管UOE成形技术及发展策略[J].锻压技术,2000(3):22-25.
[8]李宏.直缝埋弧焊钢管生产线预弯工艺[J].焊管,2006,29(1):55-57.
[9]肖兵,彭必友,查五生,等.金属塑性成形理论与技术基础[M].成都:西南交通大学出版社,2013:122.
[10]高锦张.塑性成形工艺与模具设计[M].北京:机械工业出版社,2015:80,87.
[11] GB/T 9711—2011石油天然气工业管线输送系统用钢管[S].北京:中国标准出版社,2014.
[12]尚才众,贾云刚,杨森民.壁厚48 mm钢管复合坡口倒棱工艺[J].钢管,2016,45(5):77-82.
[13]尚才众,王昕军,贾云刚,等. JCO埋弧焊外防腐涂装钢管焊缝余高的控制[J].焊管,2016,39(12):59-64.