An automated method based on the curve chain was proposed for dimensioning of engineering drawings for the mechanical products.According to the internal relation between the features of 3D model feature and elements o...An automated method based on the curve chain was proposed for dimensioning of engineering drawings for the mechanical products.According to the internal relation between the features of 3D model feature and elements of 2D drawing,the curve chain was established to reflect the geometric topological structure between the elements.It divides the dimensions into the absolute dimensions within the cure chain and the relative dimensions between the curve chains.The parallel and lengthy relationship between the drawing elements of the constructed X and Y parallel matrix was solved to remove redundant elements in the curve chain and labeled the absolute dimensions of the remaining valid elements.The average minimum weight coefficient was introduced to judge the dependence on the relative dimensions between curve chains.Through the analysis of the overlap between the circular rectangular areas,including all the absolute dimensions of the curve chains,overlapping curve chains were merged,and their dimensions were rearranged to avoid the cross interference between them.The method was seamlessly integrated into the drafting module of product design software NX,and it developed an automated dimensioning system.The examples show that the system has excellent interactivity and robustness in the dimensioning of product engineering drawings.The dimension information is complete,accurate and reliable.展开更多
Based on the necessity of three dimensional modeling with computer in teaching reform,this paper is the summarization of reform practice of teaching engineering drawing in our institute.The teaching reform begins with...Based on the necessity of three dimensional modeling with computer in teaching reform,this paper is the summarization of reform practice of teaching engineering drawing in our institute.The teaching reform begins with three dimensional modeling that used computer instead of board.On the basis of target of teaching reform,set of teaching content,arrangement of class hour and teaching method,the research of teaching practice have been done,and very good effects in teaching of engineering drawing have been achieved.展开更多
The course of architectural engineering drawing is the basic course before the students of civil engineering related majors study the professional courses.It aims to cultivate the students’ability of configuration,ex...The course of architectural engineering drawing is the basic course before the students of civil engineering related majors study the professional courses.It aims to cultivate the students’ability of configuration,expression,reading and drawing.BIM Technology simulates the real component information of a building through digital information simulation,and flexibly transforms between two-dimensional and threedimensional,providing a new tool for the teaching of architectural engineering drawing.This paper analyzes the characteristics of BIM Technology and teaching advantages,combined with the current teaching situation of architectural engineering drawing course,puts forward reform suggestions and implementation process,and provides reform ideas for the teaching of engineering basic courses.展开更多
基金This work is supported by the Science and Technology Planning Project of Ronggui(grant number RGJF(2017)27H-8).
文摘An automated method based on the curve chain was proposed for dimensioning of engineering drawings for the mechanical products.According to the internal relation between the features of 3D model feature and elements of 2D drawing,the curve chain was established to reflect the geometric topological structure between the elements.It divides the dimensions into the absolute dimensions within the cure chain and the relative dimensions between the curve chains.The parallel and lengthy relationship between the drawing elements of the constructed X and Y parallel matrix was solved to remove redundant elements in the curve chain and labeled the absolute dimensions of the remaining valid elements.The average minimum weight coefficient was introduced to judge the dependence on the relative dimensions between curve chains.Through the analysis of the overlap between the circular rectangular areas,including all the absolute dimensions of the curve chains,overlapping curve chains were merged,and their dimensions were rearranged to avoid the cross interference between them.The method was seamlessly integrated into the drafting module of product design software NX,and it developed an automated dimensioning system.The examples show that the system has excellent interactivity and robustness in the dimensioning of product engineering drawings.The dimension information is complete,accurate and reliable.
基金Supported by Beijing City Institution of Higher Learning Talent Education Program Project Foundation (PHR200906213PHR201007234)
文摘Based on the necessity of three dimensional modeling with computer in teaching reform,this paper is the summarization of reform practice of teaching engineering drawing in our institute.The teaching reform begins with three dimensional modeling that used computer instead of board.On the basis of target of teaching reform,set of teaching content,arrangement of class hour and teaching method,the research of teaching practice have been done,and very good effects in teaching of engineering drawing have been achieved.
基金The general research project of higher education teaching reform of Heilongjiang Provincial Department of education in 2019“construction and application of Engineering Graphics Teaching System Based on OBE concept and BIM Technology”,subject No.sjgy20190540Ministry of education industry university cooperation collaborative education project(new engineering construction)“Research on the application of intelligent construction technology in the training of engineering cost professionals”,Project No.201902102001.
文摘The course of architectural engineering drawing is the basic course before the students of civil engineering related majors study the professional courses.It aims to cultivate the students’ability of configuration,expression,reading and drawing.BIM Technology simulates the real component information of a building through digital information simulation,and flexibly transforms between two-dimensional and threedimensional,providing a new tool for the teaching of architectural engineering drawing.This paper analyzes the characteristics of BIM Technology and teaching advantages,combined with the current teaching situation of architectural engineering drawing course,puts forward reform suggestions and implementation process,and provides reform ideas for the teaching of engineering basic courses.
