电大《机械CADCAM》期末复习题小抄参考.doc

专业好文档  机械CAD/CAM期末复习题一、单项选择题1. 二叉树的遍历方式中，先右后左的方式不包括是( A )。A. DLR B. RDLC. RLD D. DRL2（*20（-5 2）的运行结果为（ C ）。A.10 B.30 C.60 D.503近一、二十年，机械工业取得巨大进步的特点是采用了（ D ）。    A.劳动密集型生产力 B.流水生产线 C.大量生产力 D.电子技术及其控制技术4. 下列各项中，不属于CAM工作范畴的内容是( C )。    A.生产过程管理 B.加工控制 C.应力、应变分析 D.质量控制5. 当前应用得最普遍的一种CAD型式是( D )。     A.检索型CAD  B.自动型CAD  C.人工型CAD  D.交互型CAD6. 在CAD/CAM系统中，( C )是加接CAD、CAM的纽带。    A.CAE B.CAGC.CAPP D.CAQ7.在数控机床CNC系统组成中,核心部分为( C )。A.输入输出设备 B.PLC C.CNC装置 D.伺服机构8.在派生式CAPP系统中利用分类编码进行零件分类成组的主要依据是（ B ）。A零件的材料 B特征矩阵C典型工艺 D零件的种类9. .交互型CAD系统 ( B )。     A.不需要设计人员干预 B.需要设计人员干预 C.不需要CAM干预 D.需要CAM干预10计算机辅助制造进行的内容有( A )。    A.进行过程控制及数控加工 B.CAD C.工程分析 D.机床调整11CIMS所研究的对象是( D )。    A.产品 B.零件 C.典型样件 D.一个车间或一个企业12计算机辅助制造应具有的主要特性是( A )。     A.适应性、灵活性、高效率等 B.准确性、耐久性等 C.系统性、继承性等 D.知识性、趣味性等13CIMS系统的各个子系统的联系不包括( D )。 A. 数据联系 B. 决策联系 C. 组织联系 D. 信息传输联系14在AotuLISP中，(car(11StXy 2)的运算结果为( B )。A. x B.yC. z D. (yz)15决策树又叫判定树，它不包括( B )。 A. 根 B. 干 C. 分枝 D. 节点16二叉树的遍历方式中，先右后左的方式不包括是( A )。A. DLR B. RDLC. RLD D. DRL17语句(substr(“AutoCADg 3)的执行结果是( D )。A. Aut B. CADC. oCA D. uto18在派生式CAPP系统中利用分类编码进行零件分类成组的主要依据是（ B ）。A零件的材料B特征矩阵C典型工艺D零件的种类19在CIMS中，物料需求计划简称为（ A ）。AMRPBMAP1.0CMRP-DMRP-20.（*20 （ 5 2 ） ）的运行结果为（ C ）。A10B60C140D10021.下述CAD/CAM过程的操作中，属于CAD的范畴的是（ D ）。ACAPPBCIMSCFMSD几何造型22.数据元素之间存储顺序与逻辑顺序一致的数据结构为（ A ）。A线性表B树C二叉树D图23.在对话框构件中，按钮构件为（ B ）。AtoggleBbuttonCimageDslider24.列表框包括六个属性，下列不属于列表框的属性是( B )。label .edit-limit Clist D. tabs二、填空题1.软件开发的步骤主要有软件 分析阶段 、设计阶段、实现阶段与 维护阶段 。2. 数控技术是 用数字化信息 对机床的运动及其 加工过程 进行控制的一种技术。3.CAPP系统一般分为 检索式 、派生式和 创成式 3种系统。4. 零件程序是 按一定的格式并以代码的形式 编制的，它是机床操作者与系统之间进行人机联系的纽带，通常称作 零件源程序 。 5. CAPP是 计算机辅助设计 和 计算机辅助制造 之间的桥梁，同时又是计划调度、 生产管理 等所需信息的交汇枢纽，它在计算机集成制造系统中占有重要的地位。6. 数据库是存储、关联数据的集合, 数据库管理系统 是数据库的核心部分，是 用户与数据库 之间的接口。三、名词解释1. 计算机辅助工艺过程设计(CAPP)2. 数字控制（NC）3. 零件程序4. 后置处理程序5. 数控技术6. LISP7. 计算机数控系统（CNC系统）答案参考三、名词解释题1. 计算机辅助工艺过程设计(CAPP):是通过向计算机输入被加工零件的几何信息和加工工艺信息，由计算机自动输出零件的工艺路线及工序内容等工艺文件的过程。2. 数字控制（NC）：是用数字化信息对机床的远动及其加工过程进行控制的一种技术。3. 零件程序：按一定的格式并以代码的形式编制的，他是机床操作者与系统之间进行人机联系的纽带。4.后置处理程序：将刀具位置数据、相应的切削条件和辅助信息等处理成特定的数控系统所需要的指令和程序格式，并制成穿孔纸及打印出零件加工程序单。5. 数控技术：是用数字化信息对机床的运动及其加工过程进行控制的一种技术。6. LISP：是人工智能学科领域中广泛采用的一种程序设计语言，是一种计算机的表处理语言。7. 计算机数控系统（CNC系统）：用计算机通过执行其存储器内的程序来完成部分或全部功能，并配有接口电路，伺服驱动的一种专用计算机系统。四、简答题：1.与传统的工艺设计相比CAPP有何优点？答：自动编程使用通用电子计算机和专用程序设计语言，自动进行运算和编制指令，速度快，但需要相应的设备。手工编程使用一般的计算工具，以各种数学方法人工进行运算和编制指令，速度慢。手工编程方法比较简单，容易掌握，适应性较大，但手续比较繁琐，易于出错。2.简述在AutoCAD系统中一个标准件图形库的开发步骤。答：步骤如下：建立标准件种类和参数数据库和数据文件；编写对话框和驱动程序；利用AutoLISP语言编写参数化绘图程序；在AutoCAD下拉菜单中建立子菜单；通过国标号和尺寸参数关键字在数据文件中检索标准件结构参数；使用菜单或命令调用AutoLISP参数化绘图程序，完成图样绘制；3.简述数据、数据结构、数据类型的概念。答：数据是描述客观事物的数字、字符及所有能输入到计算机并可被计算机接受和处理的各种符号的集合。数据结构一般指数据的逻辑结构，它仅考虑数据之间的逻辑关系、独立于数据的存储介质。数据类型是程序设计语言确定变量所具有的种类。4.简述数控机床的特点及其组成部分。答：数控机床具有对加工对象适应性强、自动化程度高、加工精度高且加工质量稳定、生产效率高、易于建立计算机通讯网络等特点。主要组成有：主机、CNC装置、驱动装置、辅助装置、编程机及其附属设备。5.派生式CAPP系统与创成式CAPP系统的工作原理有何不同？答：派生法是以对标准工艺规程的检索和修改为基础，而标准工艺是由有经验的工艺人员制订的。设计新零件工艺规程时要对标准工艺进行检索，并经编辑和修改而得到。创成法是由计算机软件系统，根据输入的或直接从cad系统获得的零件信息，依靠系统中的工艺数据和各种工艺决策自动设计出工艺规程。6.简述CAD/CAM系统主要硬件配置及其特点。答：CAD/CAM系统硬件配置大致有4类：主机系统、成套系统、超级微型机CAD工作站与个人计算机CAD工作站。其中主机系统主要用于分析计算、数据处理，而超微型机CAD工作站和PC CAD则具有较好的交互功能。"If we don't do that it will go on and go on. We have to stop it; we need the courage to do it."His comments came hours after Fifa vice-president Jeffrey Webb - also in London for the FA's celebrations - said he wanted to meet Ivory Coast international Toure to discuss his complaint.CSKA general director Roman Babaev says the matter has been "exaggerated" by the Ivorian and the British media.Blatter, 77, said: "It has been decided by the Fifa congress that it is a nonsense for racism to be dealt with with fines. You can always find money from somebody to pay them."It is a nonsense to have matches played without spectators because it is against the spirit of football and against the visiting team. It is all nonsense."We can do something better to fight racism and discrimination."This is one of the villains we have today in our game. But it is only with harsh sanctions that racism and discrimination can be washed out of football."The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifa's anti-racism taskforce, is in London for the Football Association's 150th anniversary celebrations and will attend City's Premier League match at Chelsea on Sunday."I am going to be at the match tomorrow and I have asked to meet Yaya Toure," he told BBC Sport."For me it's about how he felt and I would like to speak to him first to find out what his experience was."Uefa has opened disciplinary proceedings against CSKA for the "racist behaviour of their fans" during City's 2-1 win.Michel Platini, president of European football's governing body, has also ordered an immediate investigation into the referee's actions.CSKA said they were "surprised and disappointed" by Toure's complaint. In a statement the Russian side added: "We found no racist insults from fans of CSKA."Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunda.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he'll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end.Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him completely.If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it's not needed. Instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds.Even if everything goes as planned, it won't. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause there7233 机械CAD/CAM 第6页 共6页