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首页> 外文会议>ITA Technical Conference on Pipe Dream India >High Quality Tubes Require High Quality Tooling - Ways to Optimise a Roll Tool Design
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High Quality Tubes Require High Quality Tooling - Ways to Optimise a Roll Tool Design

机译：优质管需要高质量的工具 - 方法可以优化卷筒工具设计

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The paper deals with the continuous Roll Forming (RF) and High-Frequency (HF) welding processes of Internal High-Pressure (IHP) tubes. Models of the RF process and the induction forced HF welding are presented using the Finite Element software program COPRA FEA RF. In the second part (power point presentation only) examples of how to optimise roll tool design in order to achieve high quality tubes' properties are presented. In early works as a rule tube making was considered as an isothermal elastic-plastic deformation process. So it was impossible to investigate the influence of the temperature field on the tube's properties in the weld seam and in the heat affected zone. The HF welding has been considered separately without coupling to the forming process. In the so-called weld "V" the coil edges are heated by induction. Pressing the hot edges against each other some material is forged into the weld bulges. The weld bulges have to be cut off straight after the welding point. Without the consideration of these forging and cutting processes this material portion must be removed from the simulation models before the coil edges touch each other. In the paper a complete non-isothermal elastic-plastic numerical simulation method is presented including the roll forming process, the transient temperature fields during welding, the bulge cut-off, the temperature behaviour in cooling, and the tube calibration. The simulations are performed for 4 different roll geometries and 2 materials. The results are compared with real process measurements. Using numerical simulation the forming and welding process parameters are modified in order to improve the tubes' IHP properties by homogenization of the thickness and minimization of the total equivalent plastic strain (TEPS).
机译：本文涉及内部高压（IHP）管的连续轧制成型（RF）和高频（HF）焊接过程。使用有限元软件程序COPRA FEA RF，提出了RF过程的模型和感应强制HF焊接。在第二部分（仅限Power Point演示文稿）中，提出了如何优化辊刀具设计以实现高质量管的性质。在早期作品中，作为规则管制造被认为是一种等温弹性变形过程。因此，不可能研究温度场对管焊缝和热影响区中管性能的影响。 HF焊接已被分开考虑而不耦合到成形过程。在所谓的焊接“V”中，通过诱导加热线圈边缘。将热边彼此压在焊接凸起中。在焊接点之后必须直线切断焊接凸起。不考虑这些锻造和切割过程，必须在线圈边缘彼此接触之前从仿真模型中移除该材料部分。在纸质中，介绍了完整的非等温弹性塑料数值模拟方法，包括轧辊成型工艺，焊接过程中的瞬态温度场，凸起截止，冷却中的温度行为和管校准。模拟用于4个不同的辊几何形状和2材料。将结果与实际过程测量进行比较。使用数值模拟来修饰成形和焊接过程参数，以通过均匀化厚度和最小化总塑性菌株（TEPS）来改善管的IHP性能。

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