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首页> 外文会议>Innovations amp; technical realities for tube amp; pipe production >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：高质量的管子需要高质量的工具–优化辊工具设计的方法

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The paper deals with the continuous Roll Forming (RF) and High-Frequency (HF) weldingrnprocesses of Internal High-Pressure (IHP) tubes. Models of the RF process and the inductionrnforced HF welding are presented using the Finite Element software program COPRA~? FEArnRF. In the second part (power point presentation only) examples of how to optimise roll toolrndesign in order to achieve high quality tubes' properties are presented. In early works as arnrule tube making was considered as an isothermal elastic-plastic deformation process.rnSo it was impossible to investigate the influence of the temperature field on the tube'srnproperties in the weld seam and in the heat affected zone. The HF welding has beenrnconsidered separately without coupling to the forming process. In the so-called weld "V" therncoil edges are heated by induction. Pressing the hot edges against each other some materialrnis forged into the weld bulges. The weld bulges have to be cut off straight after the weldingrnpoint. Without the consideration of these forging and cutting processes this material portionrnmust be removed from the simulation models before the coil edges touch each other.rnIn the paper a complete non-isothermal elastic-plastic numerical simulation method isrnpresented including the roll forming process, the transient temperature fields duringrnwelding, the bulge cut-off, the temperature behaviour in cooling, and the tube calibration.rnThe simulations are performed for 4 different roll geometries and 2 materials. The resultsrnare compared with real process measurements. Using numerical simulation the formingrnand welding process parameters are modified in order to improve the tubes' IHP propertiesrnby homogenization of the thickness and minimization of the total equivalent plastic strainrn(TEPS).
机译：本文研究了内部高压（IHP）管的连续辊压成型（RF）和高频（HF）焊接工艺。使用有限元软件程序COPRA〜给出了RF过程和感应增强HF焊接的模型。 FEArnRF。在第二部分（仅功率点演示）中，提供了有关如何优化轧辊工具设计以实现高质量管材性能的示例。在早期的工作中，将无规则管制造视为等温弹塑性变形过程。因此，不可能研究温度场对焊缝和热影响区中管的性能的影响。 HF焊接已单独考虑，没有与成型过程相联系。在所谓的“ V”焊缝中，热卷边通过感应加热。将热边缘彼此压在一起，一些锻造成焊缝凸起的材料。焊接凸起必须在焊接点之后直接切除。在不考虑这些锻造和切削工艺的情况下，必须在线圈边缘彼此接触之前将材料部分从仿真模型中移除。rn本文提出了一种完整的非等温弹塑性数值模拟方法，其中包括轧制过程，瞬态温度在4种不同的轧辊几何形状和2种材料上进行了仿真。将结果与实际过程测量结果进行比较。通过数值模拟，修改了成形和焊接工艺参数，以通过均匀化厚度和最小化总等效塑性应变（TEPS）来改善管的IHP性能。

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