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首页> 外文期刊>International Journal of Production Research >Process planning for rotational parts using the generalized travelling salesman problem
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Process planning for rotational parts using the generalized travelling salesman problem

机译：使用广义旅行商问题对旋转零件进行工艺规划

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摘要

Process planning for rotational parts can be described as deciding on the order of machining the various features. However, this problem entails more details since each feature, hypothetically, can be machined by a left- or a right-hand tool, and in many cases, the parts can be chucked from either end. Another complicating factor is that some features require machining from both directions (with both left- and right-hand tools) and some can be machined by either tool. Thus, the process planning problem for rotational parts decides on the order of machining the various features, the chucking direction and the tool to be used for each feature. Every time the part is chucked or to a lesser extent when the tool direction is changed, the accuracy of the feature is compromised and productivity is reduced due to time spent on non-cutting operations. A good process plan, therefore, should consider the productivity as well as the overall accuracy of the part. This paper presents an algorithmic graph-theoretic approach towards determining the optimal process plan such that the part's overall accuracy is maximized, given the accuracy of the machine and the features tolerances. In particular, we describe the process-planning problem as a generalized travelling salesman problem and then use known procedures to solve the problem. This solution minimizes the overall impact of rechucking operations and tool changes on the process accuracy. Therefore, in addition to the improved precision, the process plan results in faster and more efficient operations.
机译：旋转零件的工艺计划可以描述为决定加工各种特征的顺序。但是，此问题需要更多细节，因为假设每个特征都可以用左手或右手工具进行加工，并且在许多情况下，可以从任一端夹持零件。另一个复杂的因素是，某些特征需要从两个方向进行加工（使用左手和右手工具），而某些特征可以通过任一工具进行加工。因此，旋转零件的工艺计划问题取决于各种特征的加工顺序，夹持方向和每个特征要使用的工具。每次更换零件时或在较小程度上改变工具方向时，由于要花费大量时间进行非切削操作，因此会降低零件的精度，并降低生产率。因此，一个好的工艺计划应考虑生产率以及零件的​​整体精度。本文提出了一种算法图论方法，用于确定最佳工艺计划，以便在给定机器精度和特征公差的情况下最大化零件的整体精度。特别是，我们将过程计划问题描述为广义的旅行推销员问题，然后使用已知的过程来解决该问题。该解决方案最大程度地减少了重新夹紧操作和换刀对过程精度的总体影响。因此，除了提高精度外，过程计划还可以使操作更快，更有效。

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