The Construction of Architectural CAD Course Competition Integration Teaching Mode

Architectural Computer-Aided Design(CAD)is a basic course for architectural engineering majors in vocational colleges.The integration of competition into teaching will not only help stimulate the students’enthusiasm,but also help them improve their professional skills.However,there are still some problems in the teaching of Architectural CAD.Therefore,teachers must continuously optimize the integration of competition content into Architectural CAD classes through various strategies,so as to give full play to the value of competition content in classes.We explored and analyzed the problems in the integration of competition content into Architectural CAD classes,and proposed specific strategies,in hopes of improving the quality of Architectural CAD teaching.

Improving Classroom Teaching Quality of Architectural CAD Through the Integration of Competition Content

Architectural Computer-Aided Design(CAD)is a highly technical and practical course and is also a course where its knowledge can be directly applied in the working field,which is especially important for higher vocational students majoring in architecture.In order to improve the teaching quality of this course,this paper proposes the integration of competition content into teaching under the based on the original syllabus.Therefore,the content of the“Reading and Drafting of Construction Drawings”competition is integrated into the teaching of this course,so as to realize the balanced development of teaching and competition,enhance students’professional skills and practical ability,and help students adapt to the development of the industry.With that,the goal of personnel training in higher vocational colleges can be achieved.

Integration of CAPP with CAD Based on Solid Edge

CAD technique and its software products have been d ev eloped independently of CAPP, but the market’s requirements on reducing lead-t ime of a new product and promoting automation of design and manufacture processe s need integration of CAPP with CAD. The base of CAXs’ integration in product d esign and manufacture is information integration. There are several information integration approaches, for example, by data format transition through special d ata interface, or by standard format file for data exchange (e.g. based on S TEP),etc, but the integrating approach based on PDM is a more advanced and effic ient one. The approach is based on a common database. The feature model data of a product created by the CAD sub-system is stored in the common database, and the CAPP or CAM sub-system can get access to the data for its own work, by whic h repeated input of the data is avoided and data redundancy is eliminated. T he integration approach of CAPP with CAD discussed in this paper is based on the approach. Solid Edge, one of the CAD software products of UGS company is a 3-D modeling software based on parametric feature modeling technique, which is easy to learn and use, so suitable for small and medium manufacturers’ application. The feature data of the part model created by Solid Edge Part includes geometri c and topologic information of the part which provides basic data needed by CAPP , but like other 3-D feature-based modeling software, no precision and materia l information which is also essential for CAPP. In this paper, an approach is pr esented by which the precision features and material features of the part are ad ded into the 3-D CAD part model of geometric feature. So-called precision features include dimension tolerance, shape tolerance and position tolerance and so-called material features include material type and hardness. All these data are expressed by a set of characters which, combined with the surface t ype name of the related geometric feature, is substituted for the original syste m name of the geometric feature by using the rename function of the feature tree in the EdgeBar of "Solid Edge Part" GUI. If a feature joint of the feature tree is pointed by the mouse cursor, the related profile of the model in the working area of Solid Edge Part GUI is highlighted. In this visual way, precision featu res and material features of the part are added into the part model and for each geometric feature of a part model, the surface type and dimensions created by t he 3-D feature-based modeling software are combined with the precision and mat erial properties added. Then by a VB program, all these feature data are extract ed from the model and stored in a feature table of the common database ready for CAPP visit. The database is built by using Microsoft Access. The precision feat ures and material features data are obtained by applying "split" function of VB to the character set extracted as the name property of each geometric feature ob ject of the part model. The VB program can be made a custom-defined menu comman d running in the GUI of Solid Edge Part. All of the other related key techniques are detailed in the paper and an example is given.

APPLICATION OF STEP IN CAD/CAPP INTEGRATION

A brief discussion of the content and methodology of STEP is given, and STEP based strategies for CAD/CAPP information integration is pointed out. A STEP based feature technology in which a three layer feature definition is included is discussed, the content of feature information is analyzed and a stratified CAD feature library is shown. On these bases, a commonly shared part information model is proposed. The architecture of the integrated CAD/CAPP system is presented.

A STEP-BASED CAD/CAPP INTEGRATION

The information integration of CAD/CAPP is one of the crucial techniques in CIM. Thispaper desicribes an integrated CAD/CAPP system which is implemented by connecting MPIM to BR-CAPP via an interface for data exchange between them. The data exchange between MPIM and BR-CAPP is accomplished through STEP neutral file.

机床主轴用双列圆柱滚子轴承CAD/CAPP软件的开发

阐述了以Visual Basic.NET为开发平台,中望CAD为图形处理软件的机床主轴用双列圆柱滚子轴承CAD/CAPP软件的开发思路和过程。介绍了该软件的主要模块、工作流程和操作界面,重点对数据库查询、主参数优化设计、生成设计说明书、链接图形处理软件、生成设计图纸与工艺图纸、生成草图与三维实体模型等功能进行说明,并给出了部分程序源代码,可作为其他类型轴承相关软件开发的参考。

CASE STUDY OF CAD/CAPP INTEGRATION FOR ROTATIONAL PARTS

A design-with-feature system of rotational parts has been linked with a process planner bydirect file transfer. Although both systems take the feature-based approach, inconsistency exists inthe way of defining correlation between adjacent form features, the representation schema of featurehierarchies, the way of dimensioning and tolerancing etc. Such discrepancies are outlined in this pa-per and expected to be taken into consideration in working out an improved Integrated Product Infor-mation Model for the CIM and concurrent engineering environment.

产教融合背景下的产品制图与CAD课程教学改革研究

随着行业的快速发展和技术的不断更新,传统的课程教学方式已经难以满足行业对人才的需求。产教融合作为职业教育的基本属性,能够更好地实现专业课程教学与行业需求对接。高职院校产品制图与CAD课程教学存在着教学内容理论化、教学方法单一、与行业需求脱节等问题,因此,应从课程内容与产业需求的对接、教学方法的创新与多样化、实践操作的项目化、双师队伍的建设、教学评价的多元化等方面进行改革与创新。

Design and Implementation of an Integrated CAD/CAPP System Based on PDM

Product data management (PDM) is a new technique that is developed from database management system (DBMS) to manage the information and the associated procedure of a product. Many design engineers have employed PDM tools to coordinate and control access to documented versions of product designs. But it is still a focus of research efforts in industry and academic how to further build an efficient and effective integrated product/process development environments (IPDEs) based on PDM to meet requirements of enterprises. This paper introduces the approach to design and implementation of an integrated CAD/CAPP system (IC2S) based on PDM. This system is an important compent of computer integrated manufacturing system in KELON Inc(Kelon-CIMS). It is mainly used to support for the design and development of the home electric appliances (HEA).

Multi Model Technology and Its Application in the Integration of CAD/CAM/CAE

The globalization and the intensive competition of th e automotive market require shortening the product development cycle, improving the quality and reducing the cost. Optimizing the product development process, b uilding product’s consistent defining model for life cycle, and realizing the in tegration of CAD/CAM/CAE and Concurrent Engineering (CE) become the means to acc ept the challenge. A new product modeling technology, Multi Model Technology (MM T), is provided in this paper to meet the needs of the challenge for automotive powertrain product development. First, the paper introduces the concept of Multi Model Technology. MMT introduce s Object-oriented Technology (OT) into product modeling process and combine OT with feature-based modeling technology. With the help of OT, MMT builds product object model to support system level management in product development. The obj ect model of the product is a Multi Model Structure. The MMS consists of finish part model level (assembly model level), rough part model level (part model leve l), function model level and basic model level. Every models in the MMS is creat ed by feature-based technology in design process. In this case, models in the M MS of product can be shared by casting mould, sand core and sand core mould. The refore, CAD engineers, CAE engineers and CAM engineers can work concurrently and the integration of CAD/CAM/CAE can be realized. Second, MMT is applied in cylinder head development. The multi model structures of cylinder head, its casting mould, sand core and sand core mould are built, an d the process-oriented feature models of every objects in the multi model struc tures are modeled, the application of different model objects in development pro cess is analyzed. The integrated modeling technology of cylinder head, its casti ng mould, sand core and sand core mould under MMT is studied. And the concurrent engineering oriented integration method of CAD/CAE and the method to realize th e integration of CAD/CAE under MMT are also discussed. Based on above, the integ ration of CAD/CAM/CAE of cylinder head is realized in automotive powertrain prod uct. The practice results shows that the modeling technology in this paper can optimi ze the development process, realize the data sharing and concurrent engineering in the product development process.

基于S-CAD法的县域新型城镇化发展规划方案评估研究——以陕西省佳县为例

规划方案作为相关利益主体价值观的直接体现,应当在规划评估中予以重视。基于城乡规划的公共政策属性,采用S-CAD政策评估方法,以陕西省佳县的《新型城镇化与城乡统筹规划》文本为例,选取规划编制与实施主体——政府作为主导视角,对规划文本的内容进行解构,在此基础上进行规划立场、目标、手段与预期结果的一致性、充要性与依赖性分析。研究发现:一、该规划文本自身的逻辑性较强,各个环节存在基本的对应关系;二、规划文本当中对于产业发展以及由此带来的人口问题、基础设施与公共服务设施问题的解决方案描述较多,对于生态环境保护、交通环境改善以及人口流动的实质性解决方案相对较少,逻辑上存在一定的漏洞,需进一步完善逻辑链条。基于此,提出建立城乡规划全过程评估体系及重视多元利益主体协调关系的建议,以期为相关规划的编制与评估工作提供参考。

基于CATIA的钢结构CAD与CAE一体化实现方法

为了应对钢结构在实现计算机辅助设计(CAD)与计算机辅助工程(CAE)一体化时的特殊性所带来的挑战,分析和归纳CAD与CAE一体化中数据转换,与几何理想化等关键问题,在此基础上,提出一种基于CATIA V6软件实现钢结构CAD与CAE一体化的方法,并通过一个绑扎桥钢结构的设计案例验证了该方法的有效性。通过所提方法分别实现了CAE几何理想化的自动切换与整合载荷数据至CAD模型的技术目标,从而避免了基于传统方法所带来的数据分离问题,减少了人工介入的低效工作。

Integrated CAD/CAPP/CAM system for electric discharge machining

An integrated CAD/CAPP/CAM system modeling for Electric Discharge Machining (EDM) is constructed on the basis of an integrated engineering database. EDM feature objects are developed using the object oriented database provided by AutoCAD R14, and EDM feature modeling is realized in AutoCAD environments.

RESEARCH ON CAPP/SCHEDULING INTEGRATION MULTI-AGENT SYSTEM MODEL AND IMPLEMENTATION

A design methodology for multi-agent systems is proposed. The systemicframework of CAPP and scheduling integrated multi-agent system according to design methodology isresearched. Agent model, composition model and cooperation model are discussed respectively in themulti-agent system. Static composition model and dynamic running model of CAPP and schedulingintegrated system are presented in composition model. Communication model, language model andprotocol model are discussed in corporation model. CSIMAS, CAPP and scheduling integratedmulti-agent prototype system, is developed to illuminate system model. Multiple non-rotational partsare tested in distributed process planning and scheduling environment of CSIMAS.

The Information Integration of CAPP in CIMS

This paper analyzes the flow of the process design an d the fountain of the technique data in a manufacturing enterprise, and discusse s the information flows between CAPP and other systems in CIMS, such as CAD syst em and Enterprise Resource Planning (ERP) system. And then, it discusses the pla ns of information integration between CAPP and CAD, as well as between CAPP and ERP. To design the processes of a product requires the manufacture information, such as blank material and machine tool, which is saved in a database in ERP. General ly, a traditional CAPP system considers the information of the manufacturing res ources, such as machine tool, as changeless. However, it is real changing, becau se the resources may be occupied or the machine tool may be under repair. Theref ore, in order to design the processes more reasonably, we must consider the real change of resources in a workshop. Creating a public resource database to suppo rt the real change of resources is put forward in this paper. With the public re source database, the resource integration between CAPP system and ERP is realize d; and by information collections in CAPP system, such as BOM, the material cons umption and man-hour consumption and their output to ERP, the information integ ration between CAPP system and ERP is realized.

The Research on CAD/CAPP Integrated System for Welding Boxlike Parts Made of Plate

By adopting the parameterized designing method of f ea ture assembled and feature unit, for the feature of non-conventional type parts , such as welding box and bearer, by use of Visual C++ and AutoCAD a s soft tools, the system can successfully carry out the basic function of featur e assembled, the processing of two-dimensional figure, the building of three-d imensional feature, the automatic producing of technical papers, and so on. The thoughts and design methods of this system can be served as the preference to CA D/CAPP integrated for othernon-conventional type parts. For non-conventional parts, its feature is too much, so the parameter is much. By adopting interactive entry for graphic parameter, under the control of main c ontrol module, through inputting the feature parameter and calling the feature g raphic unit, the function for modeling is completed. To reduce input of feature parameter, the description of position feature is adopted in the feature descrip tion of non-conventional parts, that is, fix position is constraint through str ucture and dimension of non-conventional parts. In such a manner, the assembled process has been transformed the coordinate conversion process, and this is ver y important in the production of three-dimensional graphics. In the one hand, b y calling the feature of parts in the library of feature-graphic unit, the two -dimensional DXF file and three-dimensional SCR file are automatically produce d in AutoCAD. On the other hand, by calling the rules and standard operational s equences in the technologic knowledge base, through inferring of inference engin e, the assembled sequence of non-conventional parts and welding sequences are a utomatically produced. The two aspects constitute overall design philosophy for system. So the CAD/CAPP integration of feature-assembled for non-conventio nal parts are completed. The principle of dividing feature is based on the thought of group technology, t hat is, according to the function feature of parts. The feature-assembled p arameterized design method is to divide the parts into many feature-units, acco rding to the structure, function, and secondary feature, and the each unit is in teractively produced, so the whole part is assembled gradually. At the same time , to display the sequences which deviser chooses varied features, hidden feature code is adopted. The feature-unit parameterized design method is to assemble dimension, margin tolerance and fitting-in, and surface roughness into one unit that it becomes a fixed structure. However big it is, it could be added to or taken off like a ba sic feature-unit.By adopting above-mentioned methods, the module of parts is e stablished. Under the integrated environment, according to basic construct of expert system, CAPP system is made up of three sectionsdynamic database (document-view ), knowledge library and inference engine. Dynamic database is served as storing initialized and middle information as well as ultimate design result. The knowl edge library is composed of static database, rule set, and standard welding proc ess library.

基于三维CAD的商品化CAPP系统研究与开发

首先,本文根据CAPP系统在企业中的应用情况,分析了企业的软件需求,并且以CAPP工具平台为基础,提出了适合国内企业需求的数字化解决方案和模式,并开发了基于三维CAD的集成工艺系统。其次,提出了一种基于COM技术的多层系统体系结构,并介绍了支撑该体系结构的几个关键技术的应用。本文将该体系结构分为三层,即核心基础层、平台框架层和应用层。最后,详细探究与分析了在系统设计过程中,关于设计方面的主要技术问题以及对应的解决方法。

Combination of Loosely and Compactly Coupled Integrations of CAD Tools and Its Applications In SAW D

A combination of the loosely and compactly coupled integrations of CAD tools and its applications in the design and fabrication of surface acoustic wave (SAW) devices are proposed in this paper. Three core modules are developed as design and mask pattern verification module,database module, and device characteristics simulation module. All the operations are controlled under Microsoft Windows GUI interface. This leads to a reduced design and fabrication cycle, workload and cost. With the knowledge-based library for intelligent design and Lotus Notes database for distributed and networked engineering database management (EDM) and effective control of documents, a new enterprise-leveled, computer-integrated design and manufacturing system (CIDMS)can be established for monolithic and hybrid device design (not only confined to SAW device).

工程学科常用CAD软件及功能分析

计算机辅助设计(Computer Aided Design,CAD)已经成为机械、电子、航天、化工及建筑等产业中不可或缺的工具之一。概述CAD软件行业的最新发展趋势和我国在该领域的进展,分析CAD软件的技术创新、产业布局以及国内企业在底层技术研发方面的进展。通过调研国际知名CAD软件公司的最新产品和策略以及国内企业的研发成果,分析CAD软件行业的技术动向。结果显示,CAD软件正朝着云端化、集成化、一体化以及智能化的方向发展,国内外企业都在不断探索新技术与CAD软件的结合,以提高设计效率和产品质量。我国CAD软件行业在政策支持和市场需求增长下将迎来更大发展空间,应加强自主研发和创新力度,以推出更多具有自主知识产权和核心竞争力的CAD产品。

Merging Functional Form Feature into GT Codes to Enhance the CAD/CAM Integration

The TangShan Research Institute of Group Technology has been engaged in the develop- ment of GT for the light industry machinery building factories since 1980.Under its overall supervision more than 8 factories have applied GT to drawing control and process planning,while 4 of them reorga- nized their machine shops into GT cells and the throughput capabilities were raisd immediately by 15 to even 49%. Since the existing GT coding systems predict only the global characteristics of machine parts,their application alone is unable to transfer all the information needed for the CAD/CAM integration in a CIM environment.From the very beginning of 1989,we started to study the feasibility of introducing concepts of Functional Form Features into GT codes.Based on the exhaustive study of nearly 100,000 part drawings from machineries for making pottery and porcelain appliances,cigarette,paper pulp, glass bottles,plastics moulding,beer and beverage filling etc.,a new GT/FFF coding system was worked out and a corresponding set of standard drawings assembled from FFF primitives Was formulat- ed which can cover up to 65—75% of existing parts from light industry machineries.FFF based GT codes greatly facilitate the standardization control of released drawings,accelerate the engineering de- sign and process planning,and certainly will play an important role in the future CIM organization.