| 摘要 |
PURPOSE: An apparatus of fret steel string for guitar is provided, in which side surface of the fret steel string for guitar is automatically and smoothly processed and the fret steel string for guitar has a certain curvature ratio during transfer of the fret steel string for guitar, and the curvature ratio is freely changed by selection of worker. CONSTITUTION: The apparatus comprises a side surface part leveling roller part(10) which is fixed to the upper surface of apparatus die, into which fret steel string(4) is continuously injected, and at which a plurality of roller parts(16,17) are arranged in a row to level the side surface part of the fret steel string; an upper and lower leveling roller part(20) positioned in rear of the side surface part leveling roller part to level upper and lower parts of the fret steel string passing through the side surface part leveling roller part; a pitch supplier(80) which is positioned in rear of the upper and lower leveling roller parts, and at the front of which vertical moving groove(80a) is formed to determine processing length of the fret steel string injected into the pitch supplier; an R-bending part(30) which is positioned at the rear side of the pitch supplier, and on which a plurality of rollers closely adhered to left and right sides of the R-bending part are mounted to form a certain curvature ratio so as to perform bending of the fret steel string so that the fret steel string has curvature ratio of a certain angle; a subsidiary guide rollers(70) installed in rear of the R-bending part to guide the fret steel string that is R-bent to a certain curvature; a groove forming punch(50) an upper part of which is formed in such a shape that the shape is symmetrical to the groove to form a certain oblique groove of the fret steel string whose processing treatment is completed through the above steps; and a cutting cutter(60) formed on the same axis line as the groove forming punch to cut the fret steel string on which groove is processed through the groove forming punch to certain length intervals.
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