A New Approach to Build a Heat Flux Model of Milling Processes
A New Approach to Build a Heat Flux Model of Milling Processes
复制标题
DOI：
10.1016/j.procir.2014.08.003
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
J. Loehe;M. Zaeh
中科院分区：
文献类型：
--
作者：
J. Loehe;M. Zaeh
在薄壁工件的精铣加工过程中，由于机械和热的影响而产生变形。因此，制造质量可能会受到影响。在theiwbis的一个研究项目的目的是模拟热引起的变形和推导方法，以减少他们。有两种方法取代了“减少方法”一词：使用较少的变形引起的工艺参数，或者-如果这种方法是不够的-补偿变形。模拟热致变形需要描述热输入，这是由铣削过程引起的。此外，该描述需要对所用工具推荐的整个工艺参数范围有效。热源模型基于铣削实验，并对热致变形进行了过程测量。实验结果允许区分热和机械引起的变形，由于端铣精加工过程中的限制。然而，这些测量仅提供了工艺参数（切削速度、每齿进给量和切屑宽度的变化）与变形之间的关系。模拟模型，这将在本文中详细描述，提供了一个可变的热输入和其产生的变形之间的关系。实验和模拟关系一起导致依赖于过程参数的热源模型。
During the finishing milling process of thin-walled workpieces, deformations occur due to the mechanical and thermal influences. Hence, the manufacturing quality may be affected. The aim of a research project at theiwbis to simulate thermally caused deformations and deriving methods to reduce them. Two approaches subsume the term “reduction methods”: the use of less deformation-causing process parameters or alternatively – if this approach is insufficient – to compensate the deformation.Simulating thermally induced deformations necessitates a description of the heat input, which is caused by the milling process. Furthermore, this description needs to be valid for the whole spectrum of process parameters recommended for the used tool. The model of the heat source is based on milling experiments with an in-process measurement of the thermally caused deformations. The experimental results allow differentiating between thermally and mechanically induced deformations due to the restriction on an end milling finishing process. However, these measurements only provide a relation between process parameters (variation of cutting speedvc, feed per toothfzand width of cutae) and deformations. The simulation model, which will be described within this paper in detail, provides the relation between a variable heat input and its resulting deformations. The experimental and the simulative relations together are leading to a heat source model in dependence of the process parameters.