门式锯机升降机构及走行机构设计自考论文.docVIP

长春工业大学毕业设计论文  PAGE 1 门式锯机升降机构及走行机构设计 摘 要 门式锯机作为锯切机械的一种，主要用来锯切各种复杂断面形状的轧件，能够获得断面整齐的定尺产品。锯切机械一般装设在轧机后面的生产线上,在很多情况下，整个轧钢车间的生产量常因锯机生产能力的限制而受到影响。 门式锯机的主要机构有四部分：走行机构、升降机构、锯片进给机构和锯切机构。通过这四部分实现锯机的行走、锯片的升降、进退和旋转运动。本文主要介绍，锯机的走行机构和升降机构的设计。包括升降机构电动机的选择、螺旋升降器的选择、联轴器的选择、固定升降机构的梁的结构设计和校核，走行机构电机的选择、链传动的设计、轴的设计、轴承的选择和校核、轴承座的选择、蜗杆减速器的选择、机架和立柱的结构设计和校核等内容。 本次毕业设计的目的在于对一般的机械结构进行设计和校核，熟练掌握各种机械手册的用法，熟练掌握Auto-CAD的使用方法，掌握一般零件的设计原则及方法，掌握一般标准零部件的选用原则，培养独立动手的能力。 关键词：升降机构;走行机构;机架和立柱;横梁  PAGE 33 ABSTRACT As a kind of sawing mechanical, frame sawing machines mostly are used to sawing all kinds of sophisticated sectional form，be able to set this type of workpiece obtain section regular to certain size product. sawing machine general is furnished at the end of roll product line. In many cases,the production of rolling plant is limited to the manufacturability of sawing. The principal organ of frame sawing machines is: running mechanism,elevating mechanism,feeding mechanism of saw blade and sawing institution.By using of this tetramerous to realize the steping of sawing, fluctuating of saw blade, advance and retreat and whirling motion. This paper mostly introduce,the design of running mechanism and elevating mechanism of sawing. Include elevating mechanism, selecting motor,selecting screw riser, selecting coupling,designing and checking girder of fixing elevating mechanism, selecting electric motor of running mechanism,designing of chain-driven,designing axial, selecting and checking bearing, selecting pillow, selecting worm reducer, physical designing and checking chassis and upright. The design for graduation is aimed at designing and checking for general mechanical structure, grasping using of different kinds of mechanical handbook, grasping using of Auto - cad, grasping design philosophy and method of general component, grasping attach principle of general standards component, grasping ability for touch unassisted. Keyword ：Elevating mechanism；Running mechanism；Chassis and Upright；Beam