Комбінований привод пристрою для обрізування книжково-журнальних блоків

Abstract

In the article, the kinematic analysis of the combined drive device for trimming book blocks is conducted. Technical speeds of line production of book and magazine blocks can be increased by improving the continuous process of trimming. Due to the technological process of cutting the spine of a book block by certain parts, the technological loads on the drive mechanism are significantly reduced. The optimal choice of the trajectory of cutting tools creates conditions for increased speed characteristics of flow lines.In the device under consideration, the cutting unit provides rotation of a number of disk knives on a circular trajectory at a specified speed. Such a device can crop the back of the book block both incidentally and on the contrary. The chosen trajectory of the disk knives movement reduces the vertical, horizontal and frontal cutting forces.The device for cutting book-magazine blocks consists of a tool unit and a drive for moving it. The tool unit contains a knife cutter, which holds a number of disc knives and a combined crank-slider drive.The aim of this study is the preliminary kinematic analysis of the device for trimming book and magazine blocks having a combined crank drive.The conducted geometric analysis of the mechanism allows to proceed to the determination of technological loads on its components. Introduction of pivotally connected additional units to the combined mechanism allows performing sequential-progressive cutting of plane of the spine of a book block. The upgraded drive provides disk knives with a programmed trajectory of motion.Selecting the optimal kinematic parameters and the cut trajectory will depend on the ratio of rotational speed of the drive crank and speed of transporting book blocks.