Suchergebnisse

The year 2016 marks the 50th anniversary of the launch of the Cultural Revolution in China, where controversy continues to rage over its meaning and its legacies. The Communist Party's unequivocal condemnatory labelling of the entire movement as"a grave'left' error…responsible for the most severe setback and the heaviest losses suffered by the Party, the state and the people since the founding of the People's Republic" has remained in place since 1981. Yet, even decades after the Party's official resolution, the Cultural Revolution remains a lightning rod for contention, particularly in Chinese cyberspace. As a result, in March 2016, with the anniversary of the start of the Cultural Revolution still months away, the Party tabloid, Global Times (Huanqiu shibao环球时报), issued an ominous warning against "small groups" that might seek to generate "a totally chaotic misunderstanding of the Cultural Revolution."The editorial sternly remindedGlobal Timesreaders that"discussions strictly should not depart from the Party's decided politics or thinking," a prohibition that appears to have short-circuited both popular discussion and scholarly reflection on this critical watershed in 20th-century Chinese politics.

Durch die erhöhte Nachfrage an elektrischen Traktionsmotoren steigen die Anforderungen an die Produktionstechnik. Die Mehrachsnadelwickeltechnik spielt dabei eine wichtige Rolle, da sie es ermöglicht Vollblechschnittstatoren vollautomatisiert zu bewickeln. Die manuelle Erstellung eines NC-Programms nimmt viel Zeit in Anspruch, was eine kritische Hürde für den Prototypenbau darstellt. In diesem Beitrag wird eine CAD/CAM-Schnittstelle vorgestellt und validiert, die es erlaubt aus den CAD-Daten sowie dem Wickelschema automatisiert ein Wickelprogramm zu erstellen.
 
Due to the increased demand for electric traction drives based on electric mobility, the requirements for production technology are increasing. The multi-axis needle winding technology plays an important role for electric traction drive production. It enables fully automated winding of non-segmented lamination stacks and is therefore very well suited for industrial series production. The manual development of a NC-program for such a machine is very complex and time consuming, which displays a critical barrier especially for prototype manufacturing. Therefore, a CAD/CAM interface was developed at the wbk Institute for Production Science, which enables the automatic development of a winding program from the CAD data of stator, machine and winding tool as well as the winding scheme. The interface is based on a Matlab program that reads in the CAD data in STL format and determines the necessary dimensions using a suitable algorithm. These can be used to calculate support points on which the winding program is based. This article describes the structure of the interface and how to validate it.