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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >A THERMAL-BASED SPINDLE BEARING LOAD CONTROLLER: PRELIMINARY EXPERIMENTAL EVALUATION
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A THERMAL-BASED SPINDLE BEARING LOAD CONTROLLER: PRELIMINARY EXPERIMENTAL EVALUATION

机译：基于热的主轴轴承负载控制器：初步实验评估

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摘要

Thermally induced bearing loads are a serious problem for high-speed machining spindles used in metal cutting. Ideally, the bearing loads can be set to provide the necessary spindle stiffness to achieve the desired dynamic performance, while at the same time achieving long bearing life. Unfortunately, this is difficult to do because many process conditions affect these loads, sometimes in difficult to predict ways with significant degradation of spindle performance and life. The purpose of this paper is to describe a preliminary experimental evaluation of controlling bearing loads by controlling the heat generated by a thermal actuator placed around the spindle housing. A box spindle modified with an electric heating tape placed around its front ball bearings is used for this evaluation. The results show that significant control over the bearing load can be achieved for the conditions tested. However, it is discovered that asymmetrical placement of the heater with respect to the pair of back-to-back angular-contact bearings makes it difficult to regulate the loads on each bearing to the set point. Solutions to this problem are discussed and further research outlined. Nevertheless, the feasibility of the control of thermally induced bearing spindle loads with an externally mounted heater appears promising.
机译：对于金属切削中使用的高速加工主轴，热轴承载荷是一个严重的问题。理想情况下，可以设置轴承载荷以提供必要的主轴刚度，以实现所需的动态性能，同时实现较长的轴承寿命。不幸的是，这很难做到，因为许多工艺条件会影响这些负载，有时会以难以预测的方式影响主轴性能和使用寿命。本文的目的是描述通过控制放置在主轴箱周围的热执行器产生的热量来控制轴承负载的初步实验评估。此评估使用的是带电加热带的箱形主轴，该带在其前球轴承周围放置。结果表明，在所测试的条件下，可以实现对轴承载荷的显着控制。然而，发现加热器相对于一对背对背角接触轴承的不对称放置使得难以将每个轴承上的负载调节到设定点。讨论了该问题的解决方案，并概述了进一步的研究。尽管如此，用外部安装的加热器控制热引起的轴承主轴负载的可行性似乎很有希望。

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