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Development of Simulator for Line Heating Process Based on Knowledge of Skilled Worker

基于熟练工人知识的线加热过程模拟器的开发

基本信息

批准号：
14350523
负责人：
TERASAKI Toshio
金额：
$ 3.46万
依托单位：
Kyusyu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

We investigated the knowledge of workers doing line heating process in the ship building field and arranged the factors related to the line heating conditions used for making the transverse shrinkage, the angular distortion and the torsional deflection. Moreover, we surveyed many papers which dealt between the deformations and the heating conditions of the line heating process by the technology. It becomes clear that the technology of the line heating process does not exist, but only the skill exists. So we focused on the bowl shape and the saddle shape representing the line heating process, and developed the simulator for line heating process based on the knowledge of skilled worker, namely, studied by the torus model based on the differential geometry. It was made clear that the transverse shrinkage was much important to make the bowl and the saddle shapes. For the bowl shape, the transverse shrinkage distribution must be the ratio of 1:3:5:7:10 from the middle point of plate width t … More o the edge of plate width. This fact obtained from the differential geometry agreed with the knowledge of the skill workers who used as triangle heating. For the saddle shape, the transverse shrinkage distribution was given by the technology based on the differential geometry. This fact also agreed with the knowledge of the skill workers who used as diamond heating. We proposed the similarity law of the plate sizes and the heat source. When the similarity law is proved in the line heating process, the plate size of 14m can change the plate size of 500mm, which can be used in the laboratory. The important point is the similarity law of heating source. We can use the laser as small heat source, then the laser forming was used for proving the theory of the similarity law. Moreover, we developed the numerical method for predicting the line heating process. We had the necessary tools for developing the simulator, but did not enough. It becomes clear how we decide the transverse distributions for making the purpose shape which is the part of ship shell. We need the knowledge of other skill worker which makes the shell expansion plan from the ship shell. This knowledge gives the positions and the values of transverse shrinkage, and is an implicit knowledge in each ship company. We tried to make from the implicitness to the technology. We succeed to predict the expansion plan from the torus model. However, our research does not reach the final goal of making the ship shell. When this technology completes, the simulator will have to complete. The important points are the positions and the values of transverse shrinkage. Less

本文调查了造船行业水火弯板生产工人的知识水平，整理了水火弯板横向收缩、角变形和扭转变形的影响因素。此外，我们还查阅了大量关于水火弯板变形与加热条件的文献。很明显，水火弯板工艺的技术并不存在，而只有技能存在。因此，我们以碗状和马鞍形两种水火弯板加热过程为研究对象，基于技术人员的知识，即基于微分几何的环面模型，开发了水火弯板加热过程仿真器。研究表明，横向收缩率对碗状和马鞍形的成形有重要影响。对于碗形，从板宽t的中点开始，横向收缩分布必须为1：3：5：7：10的比例 ...更多信息 o板宽度的边缘。这一事实从微分几何获得同意的知识的技术工人谁使用三角形加热。对于鞍形件，采用基于微分几何的技术给出了横向收缩率的分布。这一事实也同意知识的技术工人谁使用作为钻石加热。提出了平板尺寸与热源的相似律。当相似律在水火弯板工艺中得到验证时，14m的板尺寸可以改变500mm的板尺寸，可以在实验室中使用。重点是热源的相似律。利用激光作为小热源，利用激光成形来验证相似律理论。此外，我们还发展了水火弯板加热过程的数值预测方法。我们有必要的工具来开发模拟器，但还不够。这就清楚了如何确定船体外板的横向分布，以达到制作船体外板的目的。我们需要其他技术工人的知识，从船体的外壳，使外壳扩展计划。该知识给出了横向收缩的位置和值，并且是每个船公司的隐含知识。我们试图从含蓄到技术。我们成功地从环面模型预测的扩展计划。然而，我们的研究并没有达到制造船体外壳的最终目标。当这项技术完成后，模拟器将完成。重点是横向收缩的位置和值。少