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Johannes Richter,Thoms Blohm,Malte Stonis,Bernd-Arno Behrens 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.7
In the automotive industry, aluminum forged parts must fulfill lightweight and heavy duty performance requirements. The generation of thin flash between die halves and in the small gaps between the die and punch must be prevented during the flashless forging process in completely enclosed dies. However, thin flash formation is neither predictable nor preventable. A numerical model is developed based on finite element analysis to investigate and predict the generation of thin flash in aluminum flashless precision forging processes. The significance and effects of the main influencing input parameters, including billet temperature, forming velocity, and width of gap, on different resulting parameters are evaluated. Among all resulting parameters in the established numerical model, hydrostatic pressure and the forming force in the main forming direction have been identified as the most suitable for predicting thin flash generation.
Aspects of a head-mounted eye-tracker based on a bidirectional OLED microdisplay
Baumgarten, Judith,Schuchert, Tobias,Voth, Sascha,Wartenberg, Philipp,Richter, Bernd,Vogel, Uwe The Korean Infomation Display Society 2012 Journal of information display Vol.13 No.2
In today's mobile world, small and lightweight information systems are becoming increasingly important. Microdisplays are the base for several near-to-eye display devices. The addition of an integrated image sensor significantly boosts the range of applications. This paper describes the base-building block for these systems: the bidirectional organic light-emitting diode microdisplay. A small and lightweight optic design, an eye-tracking algorithm, and interaction concepts are also presented.
Aspects of a head-mounted eye-tracker based on a bidirectional OLED microdisplay
Judith Baumgarten,Tobias Schuchert,Sascha Voth,Philipp Wartenberg,Bernd Richter,Uwe Vogel 한국정보디스플레이학회 2012 Journal of information display Vol.13 No.2
In today’s mobile world, small and lightweight information systems are becoming increasingly important. Microdisplays are the base for several near-to-eye display devices. The addition of an integrated image sensor significantly boosts the range of applications. This paper describes the base-building block for these systems: the bidirectional organic light-emitting diode microdisplay. A small and lightweight optic design, an eye-tracking algorithm, and interaction concepts are also presented.