scholarly journals A PROPOSAL FOR A SYSTEMATIZATION AND TAXONOMY OF METHODS TO RECTIFY THERMALLY INDUCED ERRORS ON EXISTING MACHINE TOOLS

2021 ◽  
Vol 2021 (3) ◽  
pp. 4692-4697
Author(s):  
C. Gißke ◽  
◽  
T. Albrecht ◽  
H, Wiemer ◽  
W. Esswein ◽  
...  
Keyword(s):  
Control Systems ◽  
Machine Tools ◽  
Climate Control ◽  
Thermally Induced ◽  
Machining Errors ◽  
Implementation Effort ◽  
Fundamental Research ◽  
Machine Structure ◽  
Modern Machine ◽  
Specific Evaluation

In most sectors of today’s industry, there is the requirement to manufacture work pieces with accuracy in micron range. However, maintaining this accuracy can be considerably impeded by thermally induced displacements which arise in the production process. Thermally induced errors cause large parts of residual machining errors on modern machine tools. Using climate control systems for whole workshops can counteract these errors. Yet, this method is extremely cost and energy intensive. To increase machine accuracy and meet the industrial demands in a more efficient way, research offers various methods to minimize this error. These methods differ greatly in their approaches and requirements. Some intervene in the machine structure, while others are based on thermomechanical models and need to be integrated into the software of the control system as correction algorithms. Since machine tools also vary in their kinematic structure and complexity, it is difficult for potential users to select suitable solutions and estimate the effort required to implement them with the available resources. This paper presents a systematization and taxonomy of such methods, which was elaborated based on solutions developed in the project CRC/TR 96. By conducting semi-structured expert interviews, the functional principle, prerequisites and resources required for the application of each solution were recorded, categorized and evaluated in terms of their effort. Based on the presented systematization, it is possible to compare these different methods and evaluate them regarding their implementation effort and flexibility. This is the first step towards a user-specific evaluation of these methods in the future and towards facilitating the transfer of this fundamental research into industrial application.

Energieverbrauchssimulation von Werkzeugmaschinen*/Process-specific energy simulation of machine tools

2016 ◽  
Vol 106 (03) ◽  
pp. 163-168
Author(s):  
S. Braun ◽  
P. Schraml ◽  
E. Prof. Abele
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Machine Tools ◽  
Value Added ◽  
Energy Simulation ◽  
Prediction System ◽  
Critical Quality Attributes ◽  
Milling Operations ◽  
Nc Program ◽  
Modern Machine

Energie- und Ressourceneffizienz beschreiben Qualitätsmerkmale, die auch für moderne Werkzeugmaschinen gelten. Der Energieverbrauch von Maschinen bis zu gesamten Fertigungsstandorten muss im Verhältnis zur erzielten Wertschöpfung deutlich gesenkt werden, um wettbewerbsfähig zu bleiben und unserer Verantwortung gegenüber der Umwelt zu entsprechen. Der Fachbeitrag präsentiert anhand eines Fräsprozesses ein modellgestütztes Simulations- und Prognosesystem des Energieverbrauchs von kompletten Bearbeitungsoperationen auf einer Werkzeugmaschine als Basis energetischer Optimierungen. Teil 1 des Fachaufsatzes ist erschienen in der wt-Ausgabe 1/2-2016 auf den Seiten 60 bis 64.   Resource efficiency and energy consumption are critical quality attributes of modern machine tools. The energy consumption of machine tools, plants and facilities must be significantly reduced relative to the value added in order to stay competitive and fulfil our responsibility towards the environment. This article presents a model-based simulation and prediction system of the expected energy consumption of machine tools executing a given process NC-program as a basis for energetic optimization measures. It is exemplified by milling operations.

Energieverbrauchssimulation von Werkzeugmaschinen*/Process-specific energetic simulation of machine tools

2016 ◽  
Vol 106 (01-02) ◽  
pp. 60-64
Author(s):  
S. Braun ◽  
P. Schraml ◽  
E. Abele
Keyword(s):  
Energy Consumption ◽  
Machine Tools ◽  
Value Added ◽  
Quality Attributes ◽  
Resource Efficiency ◽  
Prediction System ◽  
Critical Quality Attributes ◽  
Milling Operations ◽  
Nc Program ◽  
Modern Machine

Energie- und Ressourceneffizienz sind Qualitätsmerkmale, die auch für moderne Werkzeugmaschinen gelten. Der Energieverbrauch von Maschinen bis zu gesamten Fertigungsstandorten muss im Verhältnis zur erzielten Wertschöpfung deutlich gesenkt werden, um wettbewerbsfähig zu bleiben und unserer Verantwortung gegenüber der Umwelt zu entsprechen. Dieser Beitrag präsentiert anhand eines Fräsprozesses ein modellgestütztes Simulations- und Prognosesystem des Energieverbrauchs von kompletten Bearbeitungsoperationen auf einer Werkzeugmaschine als Basis energetischer Optimierungen.   Resource efficiency and energy consumption are critical quality attributes of modern machine tools. The energy consumption of machine tools, plants and facilities must be significantly reduced relative to the value added in order to stay competitive and fulfil our responsibility towards the environment. This article presents a model-based simulation and prediction system of the expected energy consumption of machine tools executing a given process NC-program as a basis for energetic optimization measures. It is exemplified by milling operations.

The Influence of In-Vehicle Noise on Speech Recognition for Automotive Voice-Activated Control Systems

2002 ◽  
Vol 33 (9) ◽  
pp. 19-23
Author(s):  
By Dave G. Fish
Keyword(s):  
Speech Recognition ◽  
Control Systems ◽  
Convenient Method ◽  
Vehicle Control ◽  
Climate Control ◽  
High Demand ◽  
Vehicle Noise ◽  
Control Functions ◽  
Wide Range ◽  
Vehicle Systems

Voice activation provides a safe and convenient method of controlling vehicle systems such as in-car entertainment, telecommunications and climate control. In the fullness of time it is likely that there will be a high demand across all vehicle classes for such systems for a wide range of vehicle control functions. One of the challenges facing their development and introduction into vehicles is that of the in-vehicle noise environment.

Last-Verlagerungsverhalten von Kugelgewindetrieben/Load displacement behavior on ball screws

2020 ◽  
Vol 110 (05) ◽  
pp. 295-298
Author(s):  
Christian Brecher ◽  
Florian Kneer ◽  
Stephan Neus
Keyword(s):  
Machine Tools ◽  
Machining Process ◽  
Ball Screw ◽  
Elastic Displacement ◽  
Technical Paper ◽  
Process Forces ◽  
Displacement Behavior ◽  
Load Displacement ◽  
Machine Structure

Die axiale Steifigkeit von Kugelgewindetrieben ist wesentlich für das Betriebsverhalten von Werkzeugmaschinen. Während der Bearbeitung werden die Prozesskräfte über den Kugelgewindetrieb in die Maschinenstruktur übertragen. Kugelgewindetriebe tragen daher maßgeblich zur Qualität und Produktivität von Werkzeugmaschinen bei. Dieser Beitrag beschreibt eine Methode zur messtechnischen, prüfstandsgebundenen Ermittlung des Last-Verlagerungsverhaltens an Kugelgewindetrieben.   The axial elastic displacement of ball screws are essential for the operating behavior of machine tools. During machining, process forces must be transmitted to the machine structure via the ball screw. Ball screws contribute significantly to the quality and productivity of machine tools. This technical paper describes a methodology for the metrological determination of the load-displacement behavior on ball screws.

Störgrößenkompensation für Vorschubantriebe/Disturbance compensation for feed drives

2021 ◽  
Vol 111 (01-02) ◽  
pp. 82-87
Author(s):  
Felix Brenner ◽  
Armin Lechler ◽  
Alexander Verl
Keyword(s):  
Machine Tools ◽  
Position Control ◽  
Dynamic Compliance ◽  
High Accuracy ◽  
Considerable Improvement ◽  
Disturbance Compensation ◽  
Positioning Accuracy ◽  
Feed Drives ◽  
Modern Machine ◽  
Large Machine

Zahnstange-Ritzel-Antriebe werden überwiegend bei großen Werkzeugmaschinen eingesetzt und häufig mit indirekter Lageregelung betrieben. Hieraus resultiert eine geringe Positioniergenauigkeit und ein unzureichendes dynamisches Nachgiebigkeitsverhalten. Um den hohen Genauigkeitsanforderungen moderner Werkzeugmaschinen gerecht zu werden, wird in diesem Beitrag eine beschleunigungsbasierte Störgrößenkompensation vorgestellt. Experimentelle Ergebnisse belegen eine Verbesserung des Störverhaltens.   Rack-and-pinion drives are mainly used in large machine tools and controlled by indirect position control. This leads to low positioning accuracy as well as an insufficient dynamic compliance. To meet the high accuracy requirements of modern machine tools, this paper presents an acceleration-based disturbance compensation. Experimental results prove a considerable improvement of the disturbance behavior.

Analytical determination of cars CO2 emissions with different types of climate control systems

2021 ◽  
Author(s):  
Georgi Kadikyanov ◽  
Zhivko Kolev ◽  
Seher Kadirova ◽  
Gergana Staneva ◽  
Daniel Lyubenov
Keyword(s):  
Control Systems ◽  
Co2 Emissions ◽  
Analytical Determination ◽  
Climate Control ◽  
Different Types
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