Model-based Analysis of Decentralized Fluidic Systems in Machine Tools
Model-based Analysis of Decentralized Fluidic Systems in Machine Tools
复制标题
机床分散流体系统的基于模型的分析
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Weber
中科院分区：
文献类型：
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作者：
Linart Shabi;J. Weber;J. Weber
机床中的功率损耗，例如在生产过程中，被转换成热能。这会导致机架和其他机械部件的升温，并相应地导致机床的刀具中心点(Tcp)的位移。因此，降低了机器在生产过程中的精度。预热的部件或部件需要冷却；因此，安装了射流系统以防止这种影响。以往的研究项目主要集中在机床及其主传动的能量需求上，通过开发更高效的部件和控制策略来降低能耗。然而，流体系统的热行为，特别是冷却系统的热行为还没有详细的描述。因此，有必要对现有的冷却系统及其有效性进行详细的分析。本文的主要目的是对示范机床冷却系统的热行为进行分析，并对其系统结构进行改进。这项调查将有助于检查冷却系统在怠速和制造过程中的效率。这使得研究冷却系统的系统结构的新概念成为可能，以确保机床在最小能耗下均匀的温度分布。本文首先介绍了DBF630演示机的主要流体系统，重点介绍了冷却系统。其次，借助实验研究，对冷却系统的热行为进行了研究。在此基础上，建立了基于网络的两种工艺的冷却系统模型，并用实测数据进行了验证。最后，利用基于网络的仿真模型对分散供应单元的新概念进行了研究。结果表明，分散冷却系统具有改善机床热性能和降低机床能耗的潜力。模拟结果表明，部件的温度分布更加稳定，冷却系统的能耗也更低。
Power losses in machine tools, e.g. during production process, are converted into thermal energy. This leads to a warming of the machine frame and further machine parts and accordingly to the displacement of the tool center point (TCP) of the machine. Consequently, the accuracy of the machine during the production process is reduced. The warmed-up parts or components need to be cooled; therefore, fluidic systems are installed to prevent this effect. Previous research projects mainly focused on the energy demand of the machine tool and its main drives, reducing the energy consumption by developing more efficient components and control strategies. However, the thermal behavior of the fluidic systems, especially of the cooling system, has not yet been described in detail. Therefore, a detailed analysis of the existing cooling system and its effectivity is necessary. The main target of this paper is to analyze the thermal behavior and improve the system structure of the cooling system in a demonstration machine tool. This investigation will help to examine the efficiency of the cooling system for an idle and a manufacturing process. This makes it possible to study new concepts for the system structure of the cooling system in order to ensure a uniform temperature distribution of the machine tool at minimal energy consumption. Firstly, the paper will describe the main fluidic systems of the demonstration machine DBF630 with a special focus on the cooling system. Secondly, with the aid of experimental investigation the thermal behavior of the cooling system will be investigated. Furthermore, a network-based model of the cooling system for two processes is developed and validated against the measured data. Lastly, the new concept of a decentralized supply unit will be studied with the network-based simulation model. It can be shown that the decentralization of the cooling system has a high potential towards a better thermal behavior and a lower energy consumption of the machine tool. The simulation results show a more stable temperature profile of the components as well as a lower energy consumption of the cooling system.