Method for manufacturing a sheet molded to form a multi-dimensional curved surface

摘要

A method for manufacturing molded plates with multi-composite curved surface is provided to manufacture a forming plate having various cubic multi-composite curved surfaces. The operation program of an upper mold, a lower mold, a stretching forming unit, a marking robot, and a cutting robot is inputted (S1). The upper surface of the lower mold and the lower surface of the upper mold are formed into the shape of multi-composite curved surface (S2). After a metal plate is positioned on the upper surface of the lower mold, both ends thereof are clamped by multiple stretching forming units (S3). The metal plate is molded into the shape of the multi-composite curved surface (S4). The metal plate is marked by the marking robot (S5).

主权项

1. A method for manufacturing a sheet molded to form a multi-dimensional curved surface, comprising:
an operating environment program inputting step, to input all sorts of operating environment programs for upper and lower molds, a first and a second stretching forming machines, a marking robot and a cutting robot to obtain a curved surface in a desired shape, based on data of strain deformation according to material properties of a metal sheet to be molded, wherein the first stretching forming machine comprises a first plurality of clamps and is disposed on one side of the lower mold, and the second starching forming machine comprises a second plurality of clamps and is disposed on another side of the lower mold; an upper and lower mold processing standby step, to form a top surface of the lower mold and a bottom surface of the upper mold in a specific shape of the multi-dimensional curved surface by driving each of a number of multipoint molding pins and, based on programmed values; a metal sheet clamping step, to respectively clamp a plurality of ends of the metal sheet by using the first and second stretching forming machines after positioning the metal sheet on the top surface of the lower mold in the specific shape of the multi-dimensional curved surface, wherein each of the first and second plurality of clamps is configured to clamp each of the plurality of ends of the metal sheet respectively; a metal sheet stretching and pressing step, to pull the clamped metal sheet to be secured to the top surface of the lower mold by the first and second stretching forming machines and to press a top surface of the metal sheet by the bottom surface of the upper mold moving down onto the top surface of the metal sheet, so that the metal sheet is formed in the shape of the multi-dimensional curved surface, wherein each of the first and second plurality of clamps is configured to pull each of the plurality of ends of the metal sheet in a different direction from one another; a metal sheet marking step, to mark certain dimensions and shape on the metal sheet molded to form the shape of the multi-dimensional curved surface by the marking robot after the upper mold moves up; and a metal sheet cutting step, to laser-cut the marked metal sheet by the cutting robot, along the marking lined shape, to finally complete the processing of the sheet molded to form the multi-dimensional curved surface, wherein, at the metal sheet stretching and pressing step, a soft sheet is used between the lower mold and the metal sheet, and when the metal sheet is pulled by the stretching forming machines, the metal sheet is pulled by force exceeding a yield point and a plastic point of the metal sheet, so that a spring back phenomenon of the metal sheet is eliminated.