公开(公告)号：US4287742A

公开(公告)日：1981-09-08

申请号：US72881

申请日：1979-09-06

Applicant: John H. Heiman

Inventor： John H. Heiman

IPC: B21C37/12 ,  B21C37/28

CPC classification number: B21C37/125 ,  B21C37/121 ,  B21C37/286

Abstract: A machine which forms pipe elbows and other curved conduits by spirally winding a thin strip of sheet metal. The machine includes spaced apart cutting rollers which are reciprocated toward and away from one another by cams in order to cut the strip into a series of interconnected gores having contoured edges. The contoured edges are progressively bent in a manner to interlock by sets of bending rollers that are reciprocated inwardly and outwardly by cams. The strip is spirally wound inside of a ring shaped winding shoe having dies which interlock the opposite edges of the strip. Crimping rollers act to firmly crimp together the interlocked edges to form an acme seam. Clutches permit the cams to be selectively stopped so that the conduit that is formed can be provided with both straight and curved portions.

Abstract translation: 通过螺旋卷绕薄板状金属板形成管弯头和其他弯曲管道的机器。 机器包括间隔开的切割辊，它们通过凸轮彼此往复运动，以便将条切割成具有轮廓边缘的一系列相互连接的孔。 轮廓边缘以通过凸轮向内和向外往复运动的一组弯曲辊互锁的方式逐渐弯曲。 带状物被螺旋缠绕在具有联锁条带的相对边缘的模具的环形绕线靴的内部。 压接辊用于将互锁边缘牢固地卷曲在一起，形成一个acme接缝。 离合器允许选择性地停止凸轮，使得形成的导管可以设置有直的和弯曲的部分。