数控拉弯工艺中型材变形量的影响因素

doi:10.13229/j.cnki.jdxbgxb201604026

摘要/Abstract

摘要： 以某轨道车辆双曲率弯梁构件数控拉弯成形为例,推导了基于数控代码计算型材变形量的公式,分析了型材数控拉弯成形过程中伸长量及转角的变化规律及影响因素,将所得的变形量数据导入数值模拟模型中,对弯梁构件因伸长量设置不合理导致的拉裂缺陷进行了分析,并通过试验进行了验证。结果表明:数控拉弯成形过程中,型材总伸长量显著小于数控代码所给拉伸缸总伸长量,型材总转角大于数控代码所给支臂总转角;滑块位置对型材数控拉弯成形影响显著;型材长度、夹钳深度、预拉量不影响型材弯曲拉伸阶段伸长量,但影响型材伸长率。

关键词: 材料合成与加工工艺, 拉弯, 数控代码, 型材变形量

Abstract: Based on the NC stretch bending of a double curvatures beam of a railway vehicle, the formulae to calculate the profile deformation according to NC codes were developed. The variation trend and the influence factors of the elongation and rotation angle of the profile in NC stretch bending were analyzed. Besides, by importing the real deformation data into the numerical simulation model, the crack defect due to unreasonable elongation was analyzed and the corresponding tests were carried out. Results show that in NC stretch bending, the total elongation of the profile is significantly smaller than that of the tensile cylinder provided by the NC code, and the total rotation angle of the profile is larger than that of the arm. The position of the sliding block has a significant influence on the NC stretch bending of profile. The profile length, jig depth and pre-elongation do not affect the profile elongation in the wrap-stretching stage, but influence the elongation ratio.

Key words: materials synthesis and processing technology, stretch bending, NC code, profile deformation

中图分类号:

TG306

谷诤巍, 吕萌萌, 李欣, 徐虹. 数控拉弯工艺中型材变形量的影响因素[J]. 吉林大学学报(工学版), 2016, 46(4): 1190-1196.

GU Zheng-wei, LYU Meng-meng, LI Xin, XU Hong. Influence factors of profile deformation in NC stretch bending[J]. 吉林大学学报(工学版), 2016, 46(4): 1190-1196.

参考文献

[1] 王胜满. 用于地铁车辆的不锈钢型材拉弯成形缺陷[J]. 吉林大学学报:工学版,2013,43(6):1546-1550.
Wang Sheng-man. Stretch bend forming defects of stainless steel profiles of metro vehicles[J]. Journal of Jilin University (Engineering and Technology Edition),2013,43(6):1546-1550.
[2] 王胜满. 高速动车组端角柱构件的弯曲成形缺陷[J]. 吉林大学学报:工学版,2010,40(增刊1):247-251.
Wang Sheng-man. Forming defects of outside profile pillar parts of CRH train[J]. Journal of Jilin University (Engineering and Technology Edition),2010,40(Sup.1):247-251.
[3] 刁可山,周贤宾,李晓星,等. 矩形截面型材拉弯成形[J]. 北京航空航天大学学报,2005,31(2):134-137.
Diao Ke-shan, Zhou Xian-bin, Li Xiao-xing, et al. Stretch bending of aluminum extrusion[J]. Journal of Beijing University of Aeronautics and Astronautics,2005,31(2):134-137.
[4] 周贤宾,刁可山,李晓星,等. 闭截面型材的拉弯成形性[J]. 北京航空航天大学学报,2006,32(10):1168-1173.
Zhou Xian-bin, Diao Ke-shan, Li Xiao-xing, et al. Stretch bending formability of profile[J]. Journal of Beijing University of Aeronautics and Astronautics,2006,32(10):1168-1173.
[5] 金朝海, 周贤宾, 刁可山,等. 铝合金矩形管拉弯成形过程的数值模拟[J]. 材料科学与工艺,2004,12(6):572-575.
Jin Chao-hai, Zhou Xian-bin, Diao Ke-shan, et al. Numerical simulation of a stretch bending process for extruded aluminum rectangular tubes[J]. Materials Science and Technology,2004,12(6):572-575.
[6] 金朝海, 周贤宾, 刁可山,等. 铝合金型材拉弯成形回弹的有限元模拟[J]. 材料科学与工艺,2004,12(4):394-397.
Jin Chao-hai, Zhou Xian-bin, Diao Ke-shan, et al. Springback analysis for stretch bending of aluminum profile[J]. Materials Science and Technology,2004,12(4):394-397.
[7] 万敏,洪振军,李卫东,等. 大型异型材拉弯成形有限元模拟技术研究[J]. 锻压技术,2008,33(5):160-164.
Wan Min, Hong Zhen-jun, Li Wei-dong, et al. FEM simulation technology on stretch bending of long profile with complex section [J]. Forging and Stamping Technology,2008,33(5):160-164.
[8] 刘振宇,金朝海,李小强,等. 基于CATIA的型材拉弯夹钳加载轨迹设计系统[J]. 材料科学与工艺,2010,18(S1):158-161.
Liu Zhen-yu,Jin Chao-hai,Li Xiao-qiang, et al. Development of trajectory design of jaws in profile stretch-bending based on CATIA[J]. Materials Science and Technology,2010,18(S1):158-161.
[9] 张晓丽,李晓星,周贤宾,等. 复杂截面铝合金型材拉弯成形有限元模拟[J]. 塑性工程学报,2004,11(4):44-47.
Zhang Xiao-li, Li Xiao-xing, Zhou Xian-bin, et al. Finite element simulation for stretch-wrap bending of aluminium profile with complex cross section[J]. Journal of Plasticity Engineering,2004,11(4):44-47.
[10] 金朝海,周贤宾. 基于PS2F的铝型材拉弯回弹研究[J]. 塑性工程学报,2007,14(3):1-4.
Jin Chao-hai, Zhou Xian-bin. PS2F-based study on springback in stretch-wrap bending of aluminum profiles[J]. Journal of Plasticity Engineering,2007,14(3):1-4.
[11] 金朝海,周贤宾,谷诤巍,等. 基于位移控制的型材2D张臂式拉弯加载轨迹设计及数控代码生成[J]. 塑性工程学报,2009,16(2):66-71.
Jin Chao-hai, Zhou Xian-bin, Gu Zheng-wei, et al. Jaw trajectory design for displacement-controlled profile 2D stretch-wrap bending and part program generation[J]. Journal of Plasticity Engineering,2009,16(2):66-71.

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