摘  要

     此次设计是进行混辗式混砂机的机械结构设计，属于比较传统的机械结构类的设计。集思考，绘图，计算合三为一的设计形式叫做机械结构设计，机械结构设计是机械设计中涉及的问题最集中，最详细，工作量最大的阶段，这次设计主要包括了对混砂机的种类的叙述，混砂机传动部分的设计，砂门控制机构的选择还有控制部分的设计。
在这些部分中比较重要的是控制部分的设计，传动机构和砂门控制机构。控制部分设计采用了PLC控制。在传动设计中，首先对传动方案确立，然后在对传动部件的进行设计。在传动部件的设计中我主要设计其中的一级圆锥减速箱的中传动部件的设计，还有混砂机立式主轴的设计。在砂门控制部分，设计的要点在气缸的选择上。通过这些使新设计的混砂机在使用时更加平稳，适应性更强，效率高，而且具有结构紧凑，比例协调，美观大方，价格便宜的优点。
    
关键词：混砂机；机械结构；传动部件；减速箱
   Abstract
    This graduation design is the design of mechanical structure of mixed rolling type sand mixing machine. it is belong to the mechanical structure design of traditional. Design of mechanical structure is a set of thinking, drawing, design calculation process, it is the most involved problems in mechanical design and the most detailed, the workload of the largest stage, This design includes the types of sand mixing machine description, design of transmission machine parts, door control mechanism choice and control part of the design.
The important ones of them is the control part of the design, the transmission mechanism and sand control mechanism. The control part of the design use PLC .In the transmission design, we establish transmission scheme firstly, and then design the transmission parts. In the design of transmission part, I mainly design a conical gear box and sand mixing machine vertical spindle design. In the sand control part, the main point is the design of the cylinder which is the choice of the cylinder. Through these designs make new sand mixer more stable, more adaptable and high efficiency, and has the advantages of compact structure, proportion, beautiful generous, and cheap price.
 
Keywords: sand mixer; mechanical structure; transmission parts; reducer 

 目 录