Sughrue, Mion, Zinn, Macpeak and Seas
Mechanical punching device for punching the tuyeres of a converter
 A mechanical punching device for punching the tuyeres of a converter properly independently of the angle of inclination of the converter. Link mechanisms, each having two turning arms, are provided on both sides of a carriage with the two turning arms being connected together by the end shaft of the link drive device. The end shaft is a link drive device movable vertically so that the distance between one of the supporting shafts which serves as a fulcrum and one of the holding shafts of the mechanical puncher on the side of the punching rod is shorter than the distance between the other supporting shaft and the other holding shaft. The holding shafts slide along guide slots formed in the side wall of the carriage. The angle of inclination and horizontal and vertical positions of the mechanical puncher are thereby changed with a single operation of the link drive device. 
Nippon Mining Company Limited
F
F27D
inventional
Nobuhiro Masao Yukio
Higashiiriki Fujita Iyama