Lee, Young, Reddish, Lough, and Clayton (1983) reported that the timing control of jumping and vertically punching a dropping ball exploits the inverse of the rate of change of optical expansion, tau(r). We raise a number of methodological and logical criticisms against their experiment and conclusions and attempt to rectify them by examining elbow joint angles only, in seated punchers, under b...

This paper presents an application of the SingleMinute Exchange of Die (SMED) methodology to a turret punching machine in an elevators company, in Portugal. The work was developed during five months, in the ambit of a master thesis in Industrial Engineering and Management. The Lean Production tool SMED was applied to reduce setup times in order to improve the production flexibility of the machi...

The process of sample punching on the stainless steel plate can calibrate position and effectively improve development accurate positioning in subsequent process. processing technology laser not only satisfies efficient work equipment, but also realizes function positioning, which is great help to sheet metal processing. affected by many parameters will result slag inclusions socket after punch...