Prozess-Maschine-Interaktion des Verzahnungshonens/Process-machine-interaction for gear honing

2021 ◽  
Vol 111 (05) ◽  
pp. 336-342
Author(s):  
Christian Brecher ◽  
Thomas Bergs ◽  
Caroline Kiesewetter-Marko ◽  
Maximilian Schrank ◽  
Stephan Neus ◽  
...  
Keyword(s):  
Research Project ◽  
Machine Model ◽  
Machine Performance ◽  
Gear Honing ◽  
Process Forces ◽  
Coupled Process ◽  
Machine Interaction ◽  
Process Machine Interaction ◽  
A Current

Für die Endbearbeitung von Zahnrädern wird unter anderem das Verzahnungshonen eingesetzt. Die theoretisch erreichbare Maschinenleistung kann aufgrund auftretender Schwingungen eingeschränkt sein. In einem aktuellen Forschungsprojekt zur Abbildung der Prozess-Maschine-Interaktion beim Verzahnungshonen werden die Eigenschaften der Maschine und die Prozesskräfte berücksichtigt. In diesem Beitrag wird ein gekoppeltes Prozess-Maschine-Modell für das Verzahnungshonen vorgestellt.   One of the processes used for finishing gears is gear honing. The theoretically achievable machine performance can be limited due to occurring vibrations. A current research project for modelling the process-machine interaction in gear honing considers the characteristics of the machine and the process forces. This article presents a coupled process-machine model for gear honing.

scholarly journals Modeling and Simulation of Process-Machine Interaction in Grinding of Cemented Carbide Indexable Inserts

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Feng ◽  
Bin Yao ◽  
BinQiang Chen ◽  
DongSheng Zhang ◽  
XiangLei Zhang ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Instability ◽  
Process Models ◽  
Cemented Carbide ◽  
Machining Process ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Machine Model ◽  
Machine Interaction ◽  
Process Machine Interaction

Interaction of process and machine in grinding of hard and brittle materials such as cemented carbide may cause dynamic instability of the machining process resulting in machining errors and a decrease in productivity. Commonly, the process and machine tools were dealt with separately, which does not take into consideration the mutual interaction between the two subsystems and thus cannot represent the real cutting operations. This paper proposes a method of modeling and simulation to understand well the process-machine interaction in grinding process of cemented carbide indexable inserts. First, a virtual grinding wheel model is built by considering the random nature of abrasive grains and a kinematic-geometrical simulation is adopted to describe the grinding process. Then, a wheel-spindle model is simulated by means of the finite element method to represent the machine structure. The characteristic equation of the closed-loop dynamic grinding system is derived to provide a mathematic description of the process-machine interaction. Furthermore, a coupling simulation of grinding wheel-spindle deformations and grinding process force by combining both the process and machine model is developed to investigate the interaction between process and machine. This paper provides an integrated grinding model combining the machine and process models, which can be used to predict process-machine interactions in grinding process.

Process-Machine Interaction in Sheet-Bulk Metal Forming

2012 ◽  
Vol 504-506 ◽  
pp. 999-1004 ◽  
Author(s):  
Bernd Arno Behrens ◽  
Richard Krimm ◽  
Valerian Salfeld
Keyword(s):  
Metal Forming ◽  
Vertical Direction ◽  
Computational Accuracy ◽  
Forming Process ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
Process Forces ◽  
The Press ◽  
Machine Interaction ◽  
Process Machine Interaction

The present contribution deals with the process-machine interaction and its impacts on the workpiece quality by forming parts with sheet-bulk metal forming. It focuses on the manufacturing of complex asymmetrical parts with functional elements. The functional applications of these elements such as fixation, motion and load transmission require compliance with high geometrical accuracy as well as high precision regarding the final mechanical properties of the part. The high process forces in horizontal as well as in vertical direction to form these elements cause displacements of the tool and press components, which lead to workpiece defects retroactively. Although the interaction between the forming machine and process affects the quality of the finished part significantly, the machine influence is usually ignored in the analysis of the forming process with the Finite-Element-Method. The challenges mentioned are demonstrated by forming of a complex asymmetrical part with gear teeths and carrier elements. As typical for sheet-bulk metal forming, the dimensions of the finished gear teeths (4mm) are much higher as the initial thickness of the sheet metal (3mm). The displacements of the press components during the process have been determined by means of optical measuring systems. The results are presented in all three spatial directions. The conclusions about the acting process forces in horizontal and vertical direction have been made by analyzing the press displacements by means of a new developed three-axial load device. Finally, this paper introduces a suitable approach to represent the machine characteristics in order to improve the computational accuracy of sheet-bulk metal forming simulations and gives an overview about the possibilities to improve the process stability by improving the mechanical components of forming machines.

Schwingungsphänomene beim Verzahnungshonen*/Vibration phenomena during gear honing

2017 ◽  
Vol 107 (05) ◽  
pp. 307-312
Author(s):  
C. Prof. Brecher ◽  
C. Kiesewetter ◽  
M. Kampka ◽  
A. Epple
Keyword(s):  
Dynamic Process ◽  
Scientific Research ◽  
Gear Honing ◽  
Geometric Quality ◽  
Machining Operations ◽  
Machine Interaction ◽  
Process Machine Interaction

Die theoretische Leistungsfähigkeit von Verzahnungshonmaschinen lässt sich häufig aufgrund selbsterregter Schwingungen und Abweichungen von der vorgeschriebenen Verzahnungsqualität nicht vollständig ausnutzen. Bislang existieren kaum Untersuchungen für die dynamische Prozess-Maschine-Interaktion beim Verzahnungshonen. Im Fachbeitrag werden daher instabile Bearbeitungsprozesse an einer Verzahnungshonmaschine untersucht.   The theoretical productivity of gear honing machines often cannot be fully utilized because of self-excited vibrations and deviations of the required geometric quality of gears. However, so far there is almost no scientific research on the dynamic process-machine-interaction for gear honing. This article deals with the investigation of unstable machining operations in a gear honing machine.

VIRTUAL MACHINING SYSTEM ENGINE FOR SIMULATION OF THE PROCESS MACHINE INTERACTION

2012 ◽  
Vol 2012 (01) ◽  
pp. 310-314
Author(s):  
Andreas Archenti ◽  
Mihai Nicolescu ◽  
Thomas Lundholm
Keyword(s):  
Virtual Machining ◽  
Machining System ◽  
Machine Interaction ◽  
Process Machine Interaction

scholarly journals Umbrellas of Conservative Belief: Explaining the Success of Evangelical Congregations in the Netherlands

2017 ◽  
Vol 30 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Paul Vermeer ◽  
Peer Scheepers
Keyword(s):  
The Netherlands ◽  
Identity Theory ◽  
Religious Communities ◽  
Dutch Society ◽  
Research Project ◽  
New Members ◽  
Relative Success ◽  
Hard Times ◽  
High Degree ◽  
A Current

Dutch society is characterized by a high degree of religious dis-affiliation and non-affiliation and most religious communities are facing hard times in the Netherlands. But there are also exceptions. Against the contemporary current of ongoing secularization, some religious communities seem to thrive like never before and even attract new members. But why is that? Why do some religious communities succeed in retaining and also attracting new members while others fail? This article focuses on successful evangelical congregations in the Netherlands and tries to account for their relative success. On the basis of a subcultural identity theory, it is argued that the success of evangelical congregations is largely due to the fact that they offer protective umbrellas of conservative belief in an otherwise very secular context. This line of thought is substantiated with empirical findings from a current research project into thriving evangelical congregations in the Netherlands. The article closes with some theoretical reflections on the future of evangelicalism in contemporary Dutch society.

scholarly journals Self-concept of adolescents with visual impairments

2019 ◽  
Vol 38 (2) ◽  
pp. 160-167
Author(s):  
Ifigeneia Manitsa ◽  
Fiona Barlow-Brown ◽  
Evanthia Lyons
Keyword(s):  
Mental Health ◽  
Social Inclusion ◽  
Visual Impairments ◽  
The Self ◽  
Self Concept ◽  
Typically Developing ◽  
Research Project ◽  
Cognitive Theories ◽  
The Impact ◽  
A Current

An account is given of a current research project which is examining the impact of social inclusion on the self-concept of adolescents with visual impairments and the way this differs from their typically developing sighted peers. The study considers developmental and cognitive theories which are used to explain the development of self-concept in typical and atypical adolescents and the impact of social inclusion on this particular aspect of mental health.

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