共查询到20条相似文献，搜索用时 16 毫秒
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利用数控车床进行零件的加工,要根据零件的复杂程度确定是手工编程还是自动编程,手工编程是自动编程的基础。以FANUC系统手工编程为例,从零件图纸分析,确定加工方案,数值计算,根据编程规则,主要是利用复合循环指令G71、G72、G76、G70进行编程,使用复合循环指令编程,可以大大简化程序编制,加工出符合技术要求的零件。 相似文献
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一、编程方法数控编程方法有手工编程和自动编程两种。手工编程是指从零件图样分析工艺处理、数据计算、编写程序单、输入程序到程序校验等各步骤主要有人工完成的编程过程。它适用于点位加工或几何形状不太复杂的零件的加工,以及计算较简单,程序段不多,编程易于实现的场合等。但对于几何形状复杂的零件（尤其是空间曲面组成的零件）,以及几何元素不复杂但需编制程序量很大的零件,由于编程时计算数值的工作相当繁琐,工作量大,容易出错,程序校验也较困难,用手工编程难以完成,冈此要采用自动编程。所谓自动编程即程序编制工作的大部分或全部有计算机完成,可以有效解决复杂零件的加工问题,也是数控编程未来的发展趋势。 相似文献
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蒋幸幸 《武汉工程职业技术学院学报》2006,18(2):40-42
分析了基于华中Ⅰ型数控系统的数控车床加工曲线回转类零件的几种编程方法，研究了该类零件的各种数控编程方法的优缺点，提出了该类零件数控编程的合理方案。 相似文献
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编程的方式有手工编程和自动编程两种。对于简单的零件通常采用手工编写程序,复杂零件通过CAM软件后置处理生成程序,但这时还不能直接使用,通常要经过部分修改后才可以进行生产加工,所以手工编程对于复杂零件的加工也是有必要的,它是我们真正掌握编程的根本。 相似文献
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本文分析了典型零件的加工过程中编程方法对零件加工精度的影响及采用不同编程方法产生加工误差的原因,分析了减小编程误差的一些措施。 相似文献
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通过对定制NX12数控车削加工模板的研究,实现在软件编程中加工参数的反复使用,从而减少编程软件操作的工作量,提高编程效率。对于典型数控车床的切削零件可实现全自动编程,对于特定零件的编程也可以实现编程的高度灵活性。 相似文献
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通过仿真加工编程＂风筒＂在Master CAM中的应用,对三维零件编程的优化方法进行了分析,分析结果表明了MasterCAM软件在三维零件编程中的应用能加快编程速度,保证加工安全,提高加工精度和生产效率。 相似文献
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二维工艺品类零件一般是由工艺品设计人员手工绘制.由复杂的不规则曲线构成,当使用电火花线切割机床进行加工时,由于计算量较大,一般应使用自动编程软件进行计算机辅助编程.但在自动编程之前,须对手工绘制的零件图纸进行前期的预处理,本文主要介绍零件图纸的前期预处理方法及其自动编程方法. 相似文献
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数控车床编程加工零件时,程序不一定要全部编辑好再加工,编程与加工的有机结合、合理安排,能大大提高零件加工的精度,提高效率. 相似文献
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二维工艺品类零件一般是由工艺品设计人员手工绘制．由复杂的不规则曲线构成，当使用电火花线切割机床进行加工时，由于计算量较大，一般应使用自动编程软件进行计算机辅助编程．但在自动编程之前，须对手工绘制的零件图纸进行前期的预处理，本文主要介绍零件图纸的前期预处理方法及其自动编程方法． 相似文献
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Tanya Forneris PhD Steven J. Danish Phd Elizabeth Fries 《Journal of educational and psychological consultation》2013,23(2):130-149
Goals for Health was a National Cancer Institute funded program designed to impact health behaviors of adolescents living in rural Virginia and New York. This study examined three specific objectives: (a) to examine participants' perceptions of the program components and the relationship between program components and overall program perception, (b) to examine whether subgroups of our participant population perceived the program differently, and (c) to examine whether having positive perceptions of the program predicted changes in program outcomes. Results indicated that program components were significantly related to program perceptions. Perceptions of the program did not differ by subgroup and program perceptions significantly predicted changes in tobacco attitudes and self-efficacy about eating behaviors. Given these findings, school consultants should become aware of how implementation of a program and perceptions of a program may impact program outcomes. 相似文献
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丁春芳 《邢台职业技术学院学报》2010,27(3):19-21
在程序设计教学中,学生始终感觉程序调试无从下手,程序调试比程序编写难度还要大。本文从避免程序错误、程序调试工具的使用及掌握调试程序的技巧几方面入手,介绍程序的调试。 相似文献
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Heidi L. Schnackenberg Howard J. Sullivan 《Educational technology research and development : ETR & D》2000,48(2):19-35
This study examined the effects of type of instructional control and program mode on the achievement, option use, time in the program, and attitudes of higher-ability and lower-ability university students. Ability level was determined using participants' Scholastic Aptitude Test (SAT) and American College Testing Assessment (ACT) scores. Participants were randomly assigned to four versions of a computer-delivered instructional program within higher-ability and lower-ability groups. The four versions of the instructional program were created by crossing the two control conditions (learner control, program control) with the two program modes (full, lean). Participants in the full program scored significantly higher on the posttest than those in the lean program, and higher-ability students scored significantly higher than lower-ability students. Learner-control participants chose to view 68% of the optional screens in the full program but only 35% in the lean one, and participants also spent significantly more time in the full version. Participants had more favorable attitudes toward learner control than program control. 相似文献
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一种将c＋＋面向对象的事件机制程序设计机制应用到单片机程序设计的方法,并给出了一般程序结构示例,以简化程序结构,提高程序结构的通用性． 相似文献
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刘颂浩 《暨南大学华文学院学报》2013,(4):44-50
本文根据北京大学在培养汉语国际教育硕士研究生时的一些思考和做法,特别是近两年来采取的新举措,讨论汉语国际教育硕士培养中的三个问题。文章指出,“汉语国际教育”是“对外汉语教学”这个学科内的一个专业;培养汉语国际教育专业硕士生和对外汉语教学硕士研究生时,相同点要大于二者的差异。文章认为,汉语国际教育是一个教育项目,遇到的很多问题都是学术问题,培养者需要增强学术意识;同时,培养单位应根据自身的特点,突出自己的特色。 相似文献
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由于对项目课程的内涵存在认识偏差,导致高职项目课程改革存在很多误区,如将项目等同于教学单元,将项目课程等同于技能训练或项目教学法等。消除误区的最好方法是用系统方法进行项目课程的设计,即依据职业领域构建项目课程体系;根据工作任务设计典型工作项目;依据工作逻辑序化项目课程结构,根据知识分析选择项目课程内容,依据职业特点设计学习情境及创设教学活动。 相似文献
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It is commonsensical to assume that a program needs to be implemented in order to have an impact. However, most impact evaluation studies tend to pay little attention to the issue of program implementation. This paper argues for the logical priority of program implementation through a mixed-methods evaluation of a language intervention program initiated in one of the largest urban school districts in the United States. By selecting a mixed-methods evaluation approach, the evaluation yielded results that have implications for addressing implementation issues in an impact-oriented evaluation. At the local district level, the evaluation results of what works, what does not, and how the implementation varies across teachers and classrooms have a direct implication for program staff. They can use this information to monitor the program implementation and make necessary adjustments to enhance the effectiveness of the program so that the ultimate program goal can be accomplished. 相似文献
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Matthew J. Koehler Andrea L. Zellner Cary J. Roseth Robin K. Dickson W. Patrick Dickson John Bell 《TechTrends》2013,57(3):47-53
In 2010 Michigan State University launched the first hybrid doctoral program in Educational Technology. This 5-year program blends face-to-face and online components to engage experienced, working education professionals in doctoral study. In this paper, we describe the design and evolution of the program as well as the response from students. We outline key programmatic challenges and opportunities in offering a hybrid doctoral program side by side with an existing face-to-face program. We conclude with two examples of the hybrid doctoral program in action (redesigning coursework and virtual talks) to demonstrate how we confronted these challenges and opportunities in the design of the program. 相似文献