B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
B21C 37/06 (2006.01) B23K 13/02 (2006.01) B23K 13/08 (2006.01) H05B 6/06 (2006.01)
Patent
CA 2089849
A tube production machine comprising means for forming a workpiece fed from a roll of metal strip in a tubular formation having side surfaces opposite to each other, and a pair of squeeze rollers for providing an upsetting pressure to joint the opposite side surfaces of the workpiece at a jointing point. Each of the squeeze rollers is a one-piece member having a cylindrical center portion, and upper and lower cylindrical end portions extending coaxially in opposite directions from the center portion, the upper and lower cylindrical end portions being formed for rotation in unison with the cylindrical center portion. The center portion is formed in a side peripheral surface with an annular groove to define a path for the workpiece along with the annular groove of the other squeeze roller. A roller holder bears each of the squeeze rollers at the end portions thereof, and means are provided for supplying a high frequency power to the workpiece to weld the opposite side surfaces at the jointing point so as to produce a metal tube member.
La présente invention a pour objet une machine servant au formage de tubes aux galets; une paire de galets rapprochent les rives opposées d'une bande de métal en défilement, exerçant la pression nécessaire pour joindre les rives opposées de la bande en un point de jonction déterminé. Chacun des galets est monobloc et présente une partie centrale cylindrique et des extrémités supérieure et inférieure en projection coaxiale dans des directions opposées à partir de la partie centrale, les extrémités supérieure et inférieure tournant à l'unisson avec la partie cylindrique centrale. La partie centrale, formée à la périphérie de chaque galet, offre une ouverture annulaire pour le passage de la bande de métal. Une base assure le support des axes des galets, et un dispositif fournit la puissance haute fréquence utilisée pour souder les rives opposées de la bande de métal et lui donner une forme tubulaire.
Ishizaka Yuji
Katanosaka Takashi
Kimura Hiroyasu
Masuda Osamu
Kabushiki Kaisha Meidensha
Robic
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