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Use of progressive wave: a new multisource vibration technique to assist metal forming process

机译：使用渐进波：一种新的多源振动技术，可协助金属成型过程

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摘要

Application of vibration in metal forming process has already shown numerous advantages in the past. It improves not only mechanical and surface properties of workpiece but the integration of vibration in metal forming process has also been helpful in the reduction of forming force required for the process. Majority of the work done before in this field is related to single vibration source vibration and its application in metal forming process. The aim of this work is to develop a mathematical model for multi vibration assisted forging process. The combination of multi mechanical vibrations generates a complicated movement of lower die without deforming it. This developed mathematical model proves that movement is basically in the form of progressive wave in the lower die thus resulting local surface movement. In reality this movement can be generated by the vibration given by multi piezoelectric actuators. Based on this mathematical model, simulations using finite element software Forge2011 (R) have been performed to observe the presence of progressive wave in the workpiece. The simulations' kinematics confirms the existence of progressive wave in the workpiece. Simulation results demonstrate the effect of progressive wave to reduce the forging force, reduction of friction on the lower surface of die and hence improvement the forging process. Based on the developed mathematical model and simulation results, design proposition for multi vibration assisted forging process has been presented in this work.
机译：过去，振动在金属成型过程中的应用已显示出许多优势。它不仅改善了工件的机械和表面性能，而且在金属成型过程中整合了振动，也有助于降低该过程所需的成型力。在该领域之前所做的大部分工作与单个振动源的振动及其在金属成型过程中的应用有关。这项工作的目的是为多振动辅助锻造过程开发一个数学模型。多种机械振动的结合会导致下模的复杂运动而不会使其变形。这个发达的数学模型证明，运动在下模中基本上是渐进波的形式，从而导致局部表面运动。实际上，该运动可以由多个压电致动器产生的振动产生。基于此数学模型，已使用有限元软件Forge2011（R）进行了仿真，以观察工件中是否存在渐进波。仿真的运动学证实了工件中存在渐进波。仿真结果表明，渐进波可以减小锻造力，减小模具下表面的摩擦，从而改善锻造工艺。基于开发的数学模型和仿真结果，提出了多振动辅助锻造工艺的设计方案。

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