哈尔滨工业大学2007至2008学年第一学期CAD和CAM技术基础期末考试试题A

the principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative charges and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct Government credit + business credit credit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service industries. To create policy lowlands, Highlands, integrity of service land, development land as the goal, to optimize the area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving problems associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify examination and approval links, improve efficiency; according to the .Since the educational practice of the mass line of the party, himself seriously in the education, practical control central eight rules and opposing the four winds and practicing three Suns, and check the spirit of Jiao Yulu, ideology, solicit opinions based on outstanding problems checked swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the partys political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the partys political disciplines. Conscientiously abide by the partys political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the partys political discipline problems. 2, in the implementation of the central authorities of the eight provisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction, strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs further哈尔滨工业大学2007至2008学年第一学期CAD和CAM技术基础期末考试试题A一、简述对CAD/CAM概念的理解，并列出其新技术(10分)。二、列出几种CAD中应用的几种参数化设计技术(7分)。三、简述CAD/CAM支撑软件的主要功能，并列出代表性软件(8分)。四、列举出几种线图的程序化方法，并就其一种写出简要步骤(10分)。五、请用适当方法表示图1零件的建模过程(8分)。六、谈谈对CAD/CAM集成概念的理解，其主要集成方法有哪些(7分)。七、在计算机辅助质量管理系统中，获取质量数据的主要方法有哪些？并分析其有缺点（10分）。八、如图2所示，已知平面A，由点P(x, y, z)和法矢n(xn, yn, zn)定义。请推导关于该平面对称变换的变换矩阵（计算过程即可）(10分)。哈尔滨工业大学2007-2008学年第一学期CAD/CAM技术基础期末考试试题A答案1.简述对CAD/CAM概念的理解，并列出其新技术(10分)答案及评分要点1）CAD/CAM概念的理解（3分）(1)计算机辅助设计与制造(CAD/CAM)技术是一门多学科综合性技术；(2)从制造过程和CAD/CAM系统应具备的功能两个方面理解。2）新技术（7分）(1)支持TOP-DOWN的CAD/CAM技术(2)支持DFx的CAD/CAM技术(3)智能CAD/CAM技术(4)并行工程(5)虚拟制造技术(6)计算机集成制造(7)支持异地设计制造的CAD/CAM技术2.列出几种CAD中应用的几种参数化设计技术(7分)。答案及评分要点（每点1分）(1)轮廓(2)草绘(3)尺寸驱动(4)变量驱动(5)设计合理性检查(6)动态导航(7)结构规划3.简述CAD/CAM支撑软件的主要功能，并列出代表性软件(8分)。答案及评分要点(1)基本图形资源与自动绘图AutoCAD(2)几何造型Pro/E, Unigraphics, CATIA, SolidWorks(3)工程分析与计算ANSYS, NASTRAN, COSMOS(4)仿真与模拟DelCAM, TecnoMatrix(5)专用设备控制程序生成MasterCAM, EdgeCAM(6)集成与管理ORACLE, SYBASE4.列举出几种线图的程序化方法，并就其一种写出简要步骤(10分)。答案及评分要点(1)共有三种方法，即：（6分）找到曲线的原始理论公式编程（在理论公式存在的条件下）；对线图进行离散化处理，变为表格形式，按表格程序化方法处理；拟合经验公式，按经验公式编程。(2)以第三种方法为例：（4分）将曲线离散化为数表或数据点利用最小二乘法拟合数据点对步骤的公式编程5.请用适当方法表示图1零件的建模过程(8分)。6.谈谈对CAD/CAM集成概念的理解，其主要集成方法有哪些(7分)。答案要点CAD/CAM系统集成是指将基于信息技术的CAD/CAM各组成部分以及制造系统与CAD/CAM有关的其它子系统有机地组织和管理起来，形成一个协同工作的整体，集成包括功能交互、信息共享以及数据通信三个方面的管理与控制。（3分）CAD/CAM系统的集成方法主要包括如下几种：(1)基于专用接口的CAD/CAM集成。以标准数据格式作为系统集成的接口，各应用系统只要能够按照标准格式输入/输出，就可集成到一起。（1分）(2)基于STEP的CAD/CAM集成。STEP标准提供了一种不依赖于具体系统中型机制，它规定了产品设计、开发、制造，甚至于产品全部生命周期中所包含的诸如产品形状、材料、加工方法、组装分解顺序、检验测试等必要的信息定义和数据交换的外部描述，其目标是希望完整表达产品生命周期各阶段的数据，它具有支持广泛的应用领域，独立于任何具体的CAX系统，完整表示产品数据等优点。（1分）(3)基于数据库的CAD/CAM集成。由于工程数据库在存储管理大量复杂数据方面具有独到之处，使得以工程数据库为核心的CAD/CAM集成系统的到了广泛应用。工程数据库一般包括：全局数据和局部数据的管理、相关标准及标准件库、参数化图库、刀具库、切削用量数据库、工艺知识库、数据代码库等。（1分）(4)基于PDM的CAD/CAM集成。应用产品数据管理的主要目的是为了解决大量工程图纸及技术资料的电子文档管理、材料明细表、工程文档的继承、工程变更请求、指令的跟踪管理等方面的问题，PDM已成为CAD/CAM集成方面的一项不可缺少的关键技术。应用PDM即可实现CAD/CAM的内部集成，如CAD、CAM、CAPP系统之间的集成，又可实现CAD/CAM系统与外部系统之间的集成，如与MRP系统之间的集成。（1分）7.在计算机辅助质量管理系统中，获取质量数据的主要方法有哪些？并分析其有缺点（10分）。答案要点及评分1) 4种方法（6分）手工检测半自动检测 （数字化量仪与机器人测量）自动检测 （红外头测量系统）三坐标测量机2）分析比较（4分）8.如图2所示，已知平面A，由点P(x, y, z)和法矢n(nx, ny, nz)定义。请推导关于该平面对称变换的变换矩阵（计算过程即可）(10分)。答案要点及评分步骤1，3，5，6各1分，步骤2为4，步骤4为2分(1)平移P点，使P点过坐标原点(2)旋转n,使之与n轴重合(先绕x旋转，再绕y旋转-)(3)对称变换:(4)对步骤(2)做逆变换,使n回到原来的位置,有:(5)对步骤(1)做逆变换,使P点回到原来的位置,有:(6)组合变换矩阵,有:发包人指定专人负责协调施工中的有关事宜，并监督施工进度、安全与文明施工。发包人对承包人施工中违规操作有权做好处理决定或经济处罚。streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is strictly your presentation published strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a lot of fruitful work, has made many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the four winds some outstanding issues 1, oppose formalism. One theory is that he didnt, with less close contact. Theoretical study of consciousness is not high enough, system performance is not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good enough, not really understand and grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ideological work is the objective, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is inadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically drive less. For example, rural culture team active, . Im not actively take the initiative to take up, the lack of spirit of daring to, resulting in some job had a lot of power, but no tangible results. Third, innovation, lack of motivation. Emancipation did not end, innovation does not exis