智能化折弯过程的解析定量描述模型
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摘要
板材成形的智能化，是控制科学、计算机科学与板材成形理论的有机结合，根据被加工对象的特征，利用易于监测的物理量，识别材料的性能参数，预测最优的工艺参数，并自动以最优的工艺参数完成板材成形过程。
弯曲成形的智能化是板材成形智能化研究的一个重要领域。对弯曲成形过程进行准确的定量描述是弯曲成形智能化控制系统的基础，定量描述的精度高低决定着智能化控制系统的识别及预测的精度和成败。本文采用理论解析方法，对板料V型自由弯曲过程进行了定量描述，同时利用数值模拟和实验力学分析方法修正了解析模型。
本文建立了V型自由弯曲成形智能化控制过程中的理论解析定量描述模型，分析并推导了板材弯曲三种变形模型的理论解析公式，首次采用梁的弯曲理论和能量法结合的方法推导了弯曲力和行程的理论解析公式。用MATLAB编程语言对理论解析进行编程计算，并利用ANSYS数值模拟方法对变形模型进行了修正。利用基于LabVIEW的便携式数据采集系统完成了弯曲力行程的采集实验，比较并分析了三种模型曲线和实验曲线，结果第三种模型曲线与实验曲线吻合的非常一致。这对进一步研究板材弯曲成形智能化的识别和预测具有重要意义。
The intellectualization of sheet metal forming is the process in which, through an organic combination of sheet metal forming theory with control theory and computer science, and based on the characteristics of the workpiece to be worked, the material properties are identified and the optimum technique parameters are predicted on-line by means of easily monitored physical quantities and the forming is automated to those parameters thus determined.
The intellectualization of bending is an important research field of sheet metal forming intellectualization. The exact quantitative description to bending forming process is base of intellectualized control system, The height of quantitative descriptive accuracy decides the success or failure of intellectualized control system identifiable accuracy and the predictive accuracy. This thesis quantitatively describes V-free bending process by using theoretical analysis method. At the same time, this thesis revises analytic model by using numerical simulation and the experimental mechanical analysis method.
This thesis establishes the quantitative descriptive model of theoretical analysis in V-free bending intellectualization, analyses and derivates theoretical analysis formula of three kinds of bending deformations models for the plate, and firstly derivates theoretical analysis formula of force and stroke by using beam bending theory and energy method. This thesis carries on programming calculation to theoretical analysis using MATLAB and revises deformations models using ANSYS numerical simulation. The portable data acquisition system of the LabVIEW completes acquisition experiment of force and stroke. The experiment approves that p-h curve of third kind model for V-free bending consonants with actual V-free bending’s by comparing and analysing them. It is significant for further study of identification and prediction sheet forming intellectualization.
弯曲成形的智能化是板材成形智能化研究的一个重要领域。对弯曲成形过程进行准确的定量描述是弯曲成形智能化控制系统的基础，定量描述的精度高低决定着智能化控制系统的识别及预测的精度和成败。本文采用理论解析方法，对板料V型自由弯曲过程进行了定量描述，同时利用数值模拟和实验力学分析方法修正了解析模型。
本文建立了V型自由弯曲成形智能化控制过程中的理论解析定量描述模型，分析并推导了板材弯曲三种变形模型的理论解析公式，首次采用梁的弯曲理论和能量法结合的方法推导了弯曲力和行程的理论解析公式。用MATLAB编程语言对理论解析进行编程计算，并利用ANSYS数值模拟方法对变形模型进行了修正。利用基于LabVIEW的便携式数据采集系统完成了弯曲力行程的采集实验，比较并分析了三种模型曲线和实验曲线，结果第三种模型曲线与实验曲线吻合的非常一致。这对进一步研究板材弯曲成形智能化的识别和预测具有重要意义。
The intellectualization of sheet metal forming is the process in which, through an organic combination of sheet metal forming theory with control theory and computer science, and based on the characteristics of the workpiece to be worked, the material properties are identified and the optimum technique parameters are predicted on-line by means of easily monitored physical quantities and the forming is automated to those parameters thus determined.
The intellectualization of bending is an important research field of sheet metal forming intellectualization. The exact quantitative description to bending forming process is base of intellectualized control system, The height of quantitative descriptive accuracy decides the success or failure of intellectualized control system identifiable accuracy and the predictive accuracy. This thesis quantitatively describes V-free bending process by using theoretical analysis method. At the same time, this thesis revises analytic model by using numerical simulation and the experimental mechanical analysis method.
This thesis establishes the quantitative descriptive model of theoretical analysis in V-free bending intellectualization, analyses and derivates theoretical analysis formula of three kinds of bending deformations models for the plate, and firstly derivates theoretical analysis formula of force and stroke by using beam bending theory and energy method. This thesis carries on programming calculation to theoretical analysis using MATLAB and revises deformations models using ANSYS numerical simulation. The portable data acquisition system of the LabVIEW completes acquisition experiment of force and stroke. The experiment approves that p-h curve of third kind model for V-free bending consonants with actual V-free bending’s by comparing and analysing them. It is significant for further study of identification and prediction sheet forming intellectualization.
引文
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宋黎,杨坚,黄天泽.板料弯曲成形的回弹分析与工程控制综述.锻压技术,1996,(1):18-22
Masami Konishi. Artificial Intelligence for Plastic Deformation. Journal of the Japan Society for Technology of Plasticity(JSTP),1993,387(34):345-351
杨明.知能化技術.塑性と加工,1996,427(37):859-860
Ken-ichi Manabe, M. Yang. Intelligent Technology on Sheet Metal Forming. Journal of the JSTP,1993,387(34):398-404
H. J. Park et al. A Fuzzy Self-Learning Control Method with Application to Hydroforming Processes. ASME Journal of Engineering for Industry,1995,117:197-303
Ken-ichi Kawai. Intelligent Spinning Technology. Journal of the JSTP,1993,387 (34):391-397
Kazuo Nose. Knowledge Engineering Applied to Automatic Flatness Control System for Aluminium Foil Rolling Mill. Journal of the JSTP. 1993,387(34):358-362
Yasunori Katagama et al.. Neural Fuzzy Control System for Sendzimir Cold Strip Mill. Journal of the JSTP,1993,387(34):411-415
Harutoshi Ogai et al.. Free Tension Set-up of Bar Rolling by Fuzzy Inference Method. Journal of the JSTP,1993,387(34):405-410
M. Bakhshi-Jooybari et al.. Development of an Intelligent Knowledge-Based System for Forging Die Design. Journal of Material of Process and Tech-nology,1994,45:689-694
V. L. Xu et al.. Analysis of Ring Compression Using Artificial Neural Network. Journal of Material of Process and Technology,1999,44:301-308
Tsuneo Hirai, Keihara et al.. Intelligent CAD System for Cold Forging Using Fuzzy Theory. Journal of the JSTP,1993,34(387):428-435
Keiji Yoshizawa, Kenji Ohmori.Interactive Design System for Progressive Dies. Journal of the JSTP,1993,387(34):369-375
L. Z. Ching, P. G. Jeng. Investigation of an Expert System for Sheet-Metal Bending Design. Journal of Material of Process and Technology,1994,43(2-4):165-176
L. Z. Ching, S. T. Jen. Application of an Analytical Hierarchy Process Method and fuzzy
Compositional Evaluation in the Expert System of Sheet Bending Design. Int.J.Adv. Manuf.Technal,1995,10(1):3-10
Akira Azushima. Expert for Forging Sequence Design in Forging process. Journal of the JSTP,1993,34(387):376-381
Minoru Yabe, Tomihiko Fukuyasu et al.. Expert System for Die Forging Design. Journal of the JSTP,1993,387(34):182-390
赵军,李硕本,吕炎.板材冲压成形的智能化控制技术.塑性工程学报,1999,6(4):10-21
K. A. Stelson. Real Time Identification of Workpiece Material Characteristics From Measurements During Brakeforming. ASME Journal of Engineering for Industry, 1983,(105):45-53
A. Chandra. Realtime Identification and Control of Springback in Sheet Metal Forming. ASME Journal of Engineering for Industry,1987,(109):265-273
K. A. Stelson, D. C. Gassed. An Adaptive Pressbrake Control Using an Elastic-Plastic Material Model. ASME Journal of Engineering for Industry,1982,104:389-393
K. A. Stelson. An Adaptive Pressbrake Control for Strain-Hardening Materials. ASME Journal of Engineering for Industry,1986,108:127-132
W. M. Sing, K. P. Rao. Knowledge-Based Process Layout System for Axisymmetrical Deep Drawing Using Decision Tables. Computer & Industrial Engineering,1997,32(2):299-319
R. Singh, G. S. Sekhon. An Expert System for Optimal Selection of a Press for a Sheet Metal Operation. Journal of Materials Processing Technology, 1999,86(1-3):131-138
何大钧,王孝培,罗永建.筒形件拉深CAPP中模糊信息优化技术的应用.锻压技术,2002,1:11-14
余同希,张亮炽.塑性弯曲理论及其应用.北京:科学出版社,1992,45-86, 87-172,181-187
M. Huang, J. C. Gerdeen. Springback of Doubly Curved Developable Sheet Metal Surface. 22 An Overview, SAE Trans., Section 5, 940938, 718-731
Hill. R.塑性数学理论.王仁等译,北京:科学出版社,1966,312-319
D. K. Leu. A Simplified Approach for Evaluating Bend Ability and Springback in Plastic
Bending of Anisotropic Sheet Metals. J. Mats. Processing Technology,1997,66:9-17
F. Fenoglietto, etc. Springback analysis in Orthotropic Sheet Metal Formng: with an Elastic Plastic Formulation Using a Kinematic Hardening Model. Proc. NUMIFORM 5, Shen&Dawson(eds),1995,Balkema,Rotterdan, 699-704
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