| 摘要 |
PURPOSE:To make mass production possible by cutting into steel fibers with a cutting die having sawtooth-like lugs then cutting these protrusions with a ring- like cutting die to produce steel fibers. CONSTITUTION:A raw material 1 is passed through a bore die 2 with sawtooth- like lugs 9 on the inner periphery to cut out steel fibers 7 and also form nearly triangular lugs 8, which are inserted into the second ring-like machining tool 3 to continuously cut off the protruded stripes 8 of the raw material 1, thus fine steel fibers 7 with a nearly triangular cross section are cut off. |
