Color sorting system has been widely used for discriminant surface quality ( discriminant surface quality refers to the use of light reflection characteristics, in accordance with the skin color differences separating, according to with or without appearance damage sorting ) discrimination and internal quality ( discriminant internal quality refers to the use of light transmission properties, separation, in accordance with the maturity difference according to the internal damage between sorting in accordance with the internal quality difference, sorting, etc.). Use color sorter replaces manual election, exclude the interference of human factors, not only improves the production efficiency ( such as sorting accuracy, consistency, and reduces the production cost ). From the economics point of view or from the ecology viewpoint, application of color sorter is extremely beneficial and effective.
Then the mechanism design of control system by PLC. The system was designed, the principle, IO contact, analysis of PLC type and ladder diagram, through analysis and demonstration, to achieve the expected design requirements.
Key Words:  Automatic material, measurement, sorting, measure

目  录

摘  要 I
Abstract II
目  录 III
第1章 绪论 1
1.1自动物料分选机概述 1
1.2 PLC介绍 2
1.2.1 PLC的基本概念 2
1.2.2 PLC构成 2
1.2.3 PLC的工作原理 3
1.2.4 PLC的技术原理 5
1.2.5 PLC的优点 6
1.3 本课题的主要研究内容 6
第2章 总体方案论证 7
2.1颜色分选机的方案设计 7
2.2分选机工作原理 7
2.3 本章小结 9
第3章 一种自动物料分选机设计 10
3.1 同步带的概述 10
3.1.1同步带介绍 10
3.1.2同步带的特点 10
\3.2电机的选择 11
3.2.1电机的分类 11
3.2.2步进电机的选择 11
3.3 同步带传动计算 12
3.3.1 同步带计算选型 12
3.3.2 同步带的主要参数（结构部分） 16
3.3.3 同步带的设计 18
3.3.4 同步带轮的设计 18
3.4 气缸的选型 19
3.5 气缸的设计计算 21
3.6本章小结 22
第4章 自动物料分选机PLC控制系统的设计 22
4.1工作原理 22
4.2 I/O分配表 22
4.3 PLC选型依据 23
4.4 工作流程 24
4.5 PLC控制系统梯形图的设计 25
4.6 完整的梯形图设计 29
参考文献 31
总结与展望 32
致谢 33

机械毕业设计|论文