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首页> 外文会议>International Conference on Through-life Engineering Services >The use of infrared thermography for maintenance purposes in the production process of components for automotive alternators
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The use of infrared thermography for maintenance purposes in the production process of components for automotive alternators

机译：在汽车交流发电机的组件生产过程中使用红外热成像以进行维护目的

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This work reports an investigation concerning the employment of infrared thermography in the production environment of claw pole alternators, aimed for early detection of anomalies during the stamping stage at the press. The investigated process consists of a number of steps, starting from a raw workpiece in the form of a star, sheared from a low carbon steel plate, is brought to its final shape through bending and coining operations, using a progressive die. The process is characterized by a high production rate since the component is destined for the automobile market, therefore the controlling of both the die conditions as well as the mechanical press is crucial in order to reduce unexpected stops of the process. After having analysed each production stage, a series of experimental tests have been carried out and a series of thermal snapshots were taken during the normal production run and analyzed in order to detect any process signature which were capable of giving information concerning the process conditions. An FEM model has also been developed for each step of the process in order to characterize the material flow and, in addition, the thermal field related to the transformation of the mechanical energy into heat, due to plastic deformation of the material and frictional effects. Correlations between the geometry resulting from material flow and thermal maps detected in the production environment have allowed to address of the maintenance activity in order to eliminate defects which can affect significantly the functionality of the product as well as the die life.
机译：这项工作报告了关于爪极交流发电机生产环境中的红外热成像就业的调查，旨在早期检测印刷机冲压阶段的异常。研究的过程包括多个步骤，从低碳钢板剪模的星形形式的原始工件开始，通过渐进的模具通过弯曲和压印运行来实现最终形状。该过程的特征在于，由于该部件注定了汽车市场，因此该方法以汽车市场注定，因此控制模具条件以及机械压力机都是至关重要的，以减少该过程的意外停止。在分析每个生产阶段之后，已经进行了一系列实验测试，并且在正常生产运行期间采取了一系列热快照，并分析以检测能够提供有关工艺条件的信息的任何过程签名。对于该过程的每个步骤，也开发了一个有限元模型，以便表征材料流动，并且另外，由于材料的塑性变形和摩擦效应，与机械能转化为热的热场。由生产环境中检测到的材料流和热图产生的几何形状的相关性允许寻址维护活动，以消除可能影响产品的功能以及模具寿命的显着影响的缺陷。

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