﻿ 基于Geomagic spark的手扶式插秧机变速箱箱体重构 Optimum Design of Transmission Box for Hand-Held Transplanter Based on Geomagic Spark

Mechanical Engineering and Technology
Vol.06 No.01(2017), Article ID:20135,8 pages
10.12677/MET.2017.61009

Optimum Design of Transmission Box for Hand-Held Transplanter Based on Geomagic Spark

Weilong Cao, Yaping Wang, Shanqi Du, Chunhui Chen, Jiateng Wu

Harbin University of Science and Technology, Harbin Heilongjiang

Received: Mar. 10th, 2017; accepted: Mar. 28th, 2017; published: Mar. 31st, 2017

ABSTRACT

The gearbox is one of the core components of the transplanter. In this paper, according to the transformation of the gearbox body, Geomagic spark, a reverse engineering software, is applied to reconstruct the gearbox body, and then the optimization design is made on it. Firstly, the gearbox is scanned by hand-held laser scanner, and the 3D point cloud data is obtained. Then, the point cloud is reconstructed by using the Geomagic spark software. The three dimensional geometric model of transmission box is reconstructed by using the triangular mesh data. According to the obtained three dimensional geometric models, the model is optimized. Finally, the finite element analysis is carried out in Solid-Works Simulation, which provides a theoretical basis for the optimization design of the box. Using reverse engineering technology to optimize the transplanter gearbox, it can shorten the design cycle and reduce design costs.

Keywords:Transmission Box, Reverse Engineering, Geomagic Spark, Geometric Model, Optimized Design

1. 引言

Figure 1. Flow chart of reverse engineering

2. 变速箱箱体点云数据获取

(a) (b)

Figure 2. Experimental instruments and objects. (a) Hand-held laser scanner; (b) transplanter reducer box

Figure 3. Box point cloud data

3. 点云数据预处理

3.1. 去除无关点云数据

3.2. 减少噪点

3.3. 点云数据的合并

“合并”作为逆向工程中的其中一个步骤，完成点云数据合并的同时，也完成了数据的网格化，即由原来的三个点组成了三角形的面片，点云数据变成网格数据。

4. 实体化网格模型

Figure 4. The triangular mesh model

(a) (b)

Figure 5. The entity grid model. (a) Solid model before optimization; (b) solid model after optimization

5. 有限元分析

Simulation是SolidWorks公司开发的一种功能强大的有限元分析软件。它作为嵌入式分析软件与SolidWorks无缝集成，成为了顶级的销量产品 [16] [17] [18] 。SolidWorks Simulation能够提供丰富的计算与分析工具来对较复杂零件及装配体进行运算、测试和分析、产品设计及优化、线性与非线性分析。

5.1. 有限元分析前处理

5.2. 动力学仿真分析

Figure 6. Simplified model

Figure 7. Box grid partition

(1)

(a)(b)

Figure 8. The static stress analysis of gear box. (a) Stress nephogram; (b) strain contours

6. 结语

Optimum Design of Transmission Box for Hand-Held Transplanter Based on Geomagic Spark[J]. 机械工程与技术, 2017, 06(01): 60-67. http://dx.doi.org/10.12677/MET.2017.61009

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