Patent ID: 7866197

Claim:
A rolling-circle machine, comprising: a first rolling portion comprising: an elongate first concaved section for rolling the workpiece, the first concaved section extending along a first direction; and at least one through hole extending along a second direction perpendicular to the first direction; a second rolling portion comprising an elongate second concaved section for rolling the workpiece, wherein the second concaved section is positioned to face the first concaved section of the first rolling portion such that only the second concaved section and the first concaved section cooperatively form a rolling slot for rolling the workpiece, the rolling slot extending along the first direction, and the rolling slot being an open slot with an opening at a top thereof providing for insertion of the workpiece from outside the rolling-circle machine into the rolling slot in a downward direction; and at least one adjusting screw comprising a threaded post, wherein the threaded post passes through the corresponding at least one through hole of the first rolling portion, a first end of the threaded post is fixed in the second rolling portion, and the at least one adjusting screw is configured for moving the first rolling portion back and forth along an axis coinciding with the second direction to adjust a distance between the first rolling portion and the second rolling portion.