﻿ 无原始模型的失效模具的快速修复
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 应用科技  2019, Vol. 46 Issue (2): 122-126  DOI: 10.11991/yykj.201806008 0

引用本文

TANG Wenbin, LIU Xiaojing, SUN Wei, et al. Rapid repair of failure mold without original model[J]. Applied Science and Technology, 2019, 46(2), 122-126. DOI: 10.11991/yykj.201806008.

文章历史

Rapid repair of failure mold without original model
TANG Wenbin, LIU Xiaojing, SUN Wei, WANG Hongqiang, WANG Meng
School of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
Abstract: Focusing on the repair problem of failure die’s insert block, the advanced 3D scanning technology was used to obtain accurate point cloud data of failure die, and optimize the point cloud. Reconstruct the failure mold model with professional reverse point cloud processing software Geomagic Design X. Through reverse engineering, the original model of the area to be repaired was obtained under the condition of not having original model, obtaining the model of the failure die to be required. Based on the numerical model with die failure, the advanced TIG automatic welding technology was applied to repair failure die, obtaining mould’s insert block with higher repair quality.
Keywords: reverse engineering    failure die    reconstruction model    3D scanning    modeling    point clouds processing    curved surface reconstruction    repair

1 点云数据的采集与处理 1.1 数据采集的方法

1.2 失效模具扫描前处理 1.2.1 去除表面毛刺、锈蚀

1.2.2 模具表面着色处理

1.2.3 失效模具扫描规划

1.3 失效模具点云处理

2 失效模型的曲面重构 2.1 失效模具领域划分

2.2 建立坐标与基准平面

2.3 建立模型曲面面片

2.4 建立失效模具模型

3 完整模型重构及修复 3.1 重构出原始模型

1）将失效模具的模型导入到Geomagic Design X中。首先根据失效区域的破损变化建立一个沿着破损区域的中心基准平面；然后建立垂直于此基准平面的基准平面，共建立12个基准平面，如图10所示。

2）通过建立的基准平面进行面片草图操作。根据模型的型面变化投影出失效模具的截面图，如图11（a）所示；然后根据失效区域两边的曲率变化进行桥接曲线，让磨损曲率突变的区域变得顺滑，构建闭合的多线段，如图11（b）所示。

3）通过构建的9个面片草图，使用实体放样功能将面片草图构建成实体，即失效区域实体模型，如图12所示。

3.2 求出修复区域