A method of cutting blanks from a roll of sheet material for forming large-sized panels (options)

摘要

1. A method of cutting blanks from a sheet material roll for forming large panels, whereby this coil in series with a certain pitch, specify the feeder line raskrojnoj, punched blank into a die mounted on a press raskrojnoj this line, characterized in that, after the sheet supply roll material step for each press stroke by the first counting in the feed direction of the sheet material roll and the second knife cuts a stamp without departing first workpiece on the first knife first curve minutes with a particular geometry of stamped from the blank panel, and varying along a curve of radius of curvature and a second blade on the second curve, with a definite geometry of stamped from the blank panel, and variable along the curve radius of curvature from the upper side to the lower side of the roll of sheet material with the centers of these first and second curves at the two points of intersection of these curves of the first and second horizontal axis of symmetry of the roll of sheet material, sharp angles between the tangent at the intersection point of these first and second curves upper and lower roll side is greater than 3 °, the upper part of the first curve is convex in the direction of feed of the sheet material roll and the upper portion of the second curve is concave with respect to the feeding direction of the roll, the lower part of the first curve constructed first as a symmetric and specular reflection top of this first curve about a vertical axis passing through the center of this first curve, and then as a mirror image and symmetric with respect to a horizontal axis of symmetry of the roll of sheet material, the bottom portions second curve