| Attributes | Values |
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| rdf:type
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| Description
| - Thermal errors caused by internal (motors, bearings, ball screws and their nuts, gear box, etc.) and external heat sources (effect of environment, machine operator, radiation etc.) can cause more than 70% of machine tool (MT) total error. Direct (measuring between tool and work-piece) and indirect (predictive models) approaches to compensation of thermo-dependent tool center point (TCP) displacement can be classified besides expensive redesign of a MT structure. Thermal error indirect compensation is one of the widely employed techniques to reduce the thermal errors. This contribution is a summary of recent scientific work on the modeling of highly nonlinear MT thermal errors with close attention to angular deformational elements occurring at the TCP. Thermal transfer functions (TTF) are used for the identification and control of additional internal heat sinks and sources. The applied method is dynamic and its modeling and calculation speed is suitable for real-time applications. The model solves separately both linear and angular elements participating in thermal error. The approach has been verified on a closed quill (a simple and symmetrical machine tool part), applied to a C-shaped model of a MT which has been chosen as the least favorable from the thermal point of view, and tested on a real MT. Application of internal heat sinks and sources is chosen due to the impossibility of angular deflection compensation by software thermal compensation based on machine axis reconfiguration. Measured temperature close to the heat sources (sinks) is the sole information required by the approximation TTF model. Additional heat sinks and sources cause unwanted linear TCP displacement as well. Nevertheless, their elimination is easy according to the linear behavior of this kind of sources.
- Thermal errors caused by internal (motors, bearings, ball screws and their nuts, gear box, etc.) and external heat sources (effect of environment, machine operator, radiation etc.) can cause more than 70% of machine tool (MT) total error. Direct (measuring between tool and work-piece) and indirect (predictive models) approaches to compensation of thermo-dependent tool center point (TCP) displacement can be classified besides expensive redesign of a MT structure. Thermal error indirect compensation is one of the widely employed techniques to reduce the thermal errors. This contribution is a summary of recent scientific work on the modeling of highly nonlinear MT thermal errors with close attention to angular deformational elements occurring at the TCP. Thermal transfer functions (TTF) are used for the identification and control of additional internal heat sinks and sources. The applied method is dynamic and its modeling and calculation speed is suitable for real-time applications. The model solves separately both linear and angular elements participating in thermal error. The approach has been verified on a closed quill (a simple and symmetrical machine tool part), applied to a C-shaped model of a MT which has been chosen as the least favorable from the thermal point of view, and tested on a real MT. Application of internal heat sinks and sources is chosen due to the impossibility of angular deflection compensation by software thermal compensation based on machine axis reconfiguration. Measured temperature close to the heat sources (sinks) is the sole information required by the approximation TTF model. Additional heat sinks and sources cause unwanted linear TCP displacement as well. Nevertheless, their elimination is easy according to the linear behavior of this kind of sources. (en)
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| Title
| - Approach to Compensation of Machine Tool Angular Thermal Errors Using Controlled Internal Heat Sinks and Sources
- Approach to Compensation of Machine Tool Angular Thermal Errors Using Controlled Internal Heat Sinks and Sources (en)
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| skos:prefLabel
| - Approach to Compensation of Machine Tool Angular Thermal Errors Using Controlled Internal Heat Sinks and Sources
- Approach to Compensation of Machine Tool Angular Thermal Errors Using Controlled Internal Heat Sinks and Sources (en)
|
| skos:notation
| - RIV/68407700:21220/14:00226314!RIV15-TA0-21220___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21220/14:00226314
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - approach; angular thermal errors; internal heat sinks (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Horejš, Otakar
- Hornych, Jan
- Mareš, Martin
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| http://localhost/t...ganizacniJednotka
| |
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