论影响热压板刚度的因素

ON FACTORS AFFECTING RIGIDITY OF HOT PLATENS

本文通过分析和实例计算认为:热介质孔道排列方向对热压板刚度、静承载能力的影响程度不大。在纵、横孔道排列方向条件下,热压板中心点挠度差率为(1.70～6.26)％、静承载能力差率为(1.58～5.76)％。故对于长方形热压板,完全可以采取横向布孔结构。搁脚方位和间距对热压板刚度的影响却是十分明显。短边支承时的挠度为长边支承时的(1.001～5.96)倍(纵向布孔)和(1～6.22)倍(横向布孔)。孔距和孔径对热压板刚度的影响程度也不大。但双层回路的刚度削弱大于单层回路,故应尽量避免采用双层孔道结构。

By analysis and caleulation, the author of this paper believes that the rigidity and static-load supporting capability of the hot platens are not substantially affected by the arrangement-direction of the channels for a hot medium. In the onditions of the longitudinal and cross direction anangements of the channels, the difference ratio of the bending deflection at the centre point is 1.70% to 6.26%, the difference ratio of the static-load supporting capability is 1.58% to 5.76%. Therefore the cross-direction arrangement of the channels is completely reasonable for the rectangular hot platen. But the rigidity of the hot platens is substantially affected by the positions and distances of the supporting feet. The deflection of short-edge supporting is 1.01 to 5.96 times (longitudinal arrangement of the channels) and 1 to 6.22 times (cross arrangement of the channels) that of long-edge supporting. The rigidity of the hot platens is not evidently affected by the distances of the holes. But the rigidity weakening for double-layer loop is higher than that for single-layer loop. Therefore it is avoided as much as possible tor use the structure of double-layer loop.