组合体尺寸标注完整性的立体思维法
Three-dimensional thinking method for the dimensioning integrity of composite solids
王克用 1张旭1
作者信息
- 1. 上海工程技术大学 机械与汽车工程学院,上海 201620
- 折叠
摘要
针对组合体尺寸标注的传统形体分析法因忽略孔、槽、楔角等局部切割结构细分,导致完整尺寸标注实操性差的问题,提出一种立体思维法,将组合体视为具有正负体积的基本体叠加,按照"先定形后定位再总体"的顺序,从长宽高 3 个维度逐个标出尺寸,剔除重复、受控以及零值尺寸.以轴承座组合体为例标注的结果表明,所提方法能够有效避免三视图尺寸标注的漏标和冗标,确保尺寸标注的完整性.
Abstract
The dimensioning integrity of a composite solid had poor practicability for having neglected local cutting structures such as holes,slots and wedges when using the conventional shape analysis method.A three-dimensional thinking method was proposed in which any composite solid could be considered as the superposition of basic bodies with positive and negative volumes.Following the order of"shaping-location-overall",all dimensions in length,width and height directions could be sought one by one and repetitive,controlled and zero-valued dimensions were simultaneously eliminated.A composite solid of bearing block was taken as an example.The results demonstrated that the proposed method could effectively avoid the deficiency and redundancy of dimensioning for three-view drawings,and therefore ensure the dimensioning integrity.
关键词
工程制图/组合体/形体分析法/尺寸完整性/立体思维法Key words
engineering drawing/composite solid/shape analysis method/dimensioning integrity/three-dimensional thinking method引用本文复制引用
基金项目
上海市教育科学研究项目(C2021017)
上海高校市级重点课程项目(s202201002)
出版年
2024
国家科技期刊平台
NSTL
万方数据