Method of optimization design for printing cylinder

Abstract

The invention discloses a method for optimized design of a printing cylinder. A finite element analysis model and a static structural analysis mathematical expression that is KX equals to F are builtat first, wherein, the static structural analysis mathematical expression corresponds to the finite element analysis model; a plurality of position points are determined on a working face of the cylinder along the circumferential direction in an equidistant manner; an included angle between the printing pressure direction and the gravity action direction is kept to be changeless; the radial displacement component of each node is determined through the finite element simulation analysis, and deflection curves of the cylinder along the axial direction and the circumferential direction are obtained, on this basis, a strengthening rib is designed in a through-hole of the cylinder to obtain the optimal printing cylinder, and further the deflection curves of the printing cylinder with the optimal structure along the axial direction and the circumferential direction are obtained; comparing the flexibility deformation curve of the cylinder having the optimal structure with the flexibility deformation curve of the original cylinder, the size of the strengthening rib of the cylinder is further optimized to obtain the optimized cylinder. The printing cylinder which is designed by adopting theoptimization design method not only improves the axial flexure deformation of the cylinder, but also reduces the circumferential flexure deformation of the cylinder at the same time, and increases the printed matter quality greatly.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and relates to a design method of printing machine components, in particular to an optimal design method of a printing cylinder. Background technique [0002] The printing cylinder is a hollow cylinder with gaps or grooves processed on the outer surface and radiation reinforcement ribs. It is the key component of the printing machine to complete the image and text transfer. During the working process of the printing machine, the two cylinders arranged side by side turn from the working surface to the neutral position, and then from the neutral position to the working surface. Through appropriate printing pressure, the information carried by the graphic carrier is copied to the substrate. [0003] In actual printing, the printing cylinder flexes and deforms under the joint action of its own gravity and printing pressure, and its maximum deflection is located at the middle section of the ...

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Problems solved by technology

[0006] The object of the present invention is to provide a method for optimizing the design of a printing cylinder. The printing cylinder designed by this method can not only effectively improve the unevenness of the axial distribution of the printing pressure without affecting the structural size of the existing printing cylinder, but also Solved the problem of uneven circumferential distribution of printing pressure

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