胶印机墨辊受力及运动分析

为了分析胶印机匀墨系统中墨辊的运动特性,建立匀墨系统中串墨辊和匀墨辊之间含有墨层的模型,用ANSYS软件进行有限元仿真分析,在对墨层建模时把其等效为低硬度的薄橡胶层.仿真后提取匀墨辊接触区的受力、变形和两墨辊的转速,分析串墨辊转速和墨辊中心距,以及等效橡胶硬度对墨辊运动的影响关系.结果表明:两墨辊相对滑动随串墨辊转速的增大而增大,随墨辊中心距和等效橡胶硬度的增大而减小.与两墨辊之间无墨层情况下的运动仿真结果进行对比,在相同转速下有油墨时的相对滑动大于无油墨时的相对滑动.通过油墨传递实验平台测得的结果与仿真分析得出的规律相一致.

Analysis of Force and Motion Characteristics of Offset Press

To analyze the motion characteristics of the ink roller, a model of ink layer between the ink distributing roller and the ink vibrator is built up by using ANSYS. The ink layer is equivalent to a thin rubber layer with low hardness. After analysis, the force and deformation on the contact area of the ink distributing roller and the rotation speed of two rollers are extracted. Factors, such as rotation speed, center distance of two rollers and hardness of rubber layer, which affect the motion of rollers, are analyzed. Result shows that the relative sliding increases with the rotation speed, and decreases with the center distance and the hardness of the equivalent rubber layer. Compared with the simulation results under the condition of no ink, at the same rotation speed, the relative sliding with ink is greater than without ink. The experimental results of the ink transfer experiment are consistent with the simulation results.