数控机床机械原点丢失的恢复

本文以FV80型加工中心为例,提出了对使用绝对编码器的加工中心原点丢失恢复的方法,既通过设计一专用检具,使检具与机床之间有一特定的安放位置来设定第二参考点,以实现机床原点的精确恢复,同时对该方法恢复机床原点的误差进行了分析。     

正确理解数控编程与操作中几个重要的位置点

数控机床的坐标系及其几个重要的位置点；区分加工原点与换刀点，对刀参考点与机床参考点在应用上的不同。     

数控机床坐标系探究

数控机床编程操作加工等都是在坐标系中进行,根据坐标系原点在机床上设置位置和作用的不同,有机械坐标系、工件坐标系、局部坐标系、附加坐标系等;在操作方法上有坐标系建立、坐标系选择、坐标系修改等.文章对上面的相关知识进行研究探讨.     

数控车床对刀及编程加工的调试特性分析

在实际生产中,数控车刀根据数控车床回转刀架的刀具安装尺寸、工件材料、加工类型、加工要求及加工条件从刀具样本中查表确定。对刀的目的是确定程序原点在机床坐标系中的位置,对刀点可以设在零件上、夹具上或机床上,对刀时应使对刀点与刀位点重合。在数控机床上加工零件时,首先要进行程序编制,编程就是将加工零件的加工顺序、刀具运动轨迹的尺寸数据、工艺参数加工信息,用规定的文字、数字、符号组成的代码,按一定格式编写成加工程序。     

回归原点——中学数学解题教学策略

解题教学是中学数学教学的重中之重,而目前的解题教学不尽如人意。解题教学要以核心素养为导向,以数学思维能力培养为目标,重在“回归原点”,要回归学生原点、回归数学原点、回归问题原点。     

圆锥曲线中的四类弦

1．原点弦与对称性 圆锥曲线都是轴对称图形,特别地,圆、椭圆和双曲线又是中心对称图形．当它们的中心在原点时,若其对应弦也过原点,则弦关于原点成中心对称．     

教师专业发展要回归原点

教育的本质就是回归原点．而教师的专业发展也要具备原点意识。什么是教育的原点呢？应该就是本真、自然、快乐。可是教师专业发展又为什，五要回归原点呢？笔者认为有以下几点原因．     

浅谈用电压法和短接法查找机床电气故障

本文简单介绍了用电压法和短接法查找机床电气故障,对从事机床电气修理的工程技术人员和技工将会提供一定的参考价值。     

浅谈用电压法和短接法查找机床电气故障

本文简单介绍了用电压法和短接法查找机床电气故障,对从事机床电气修理的工程技术人员和技工将会提供一定的参考价值.     

比较法在数控编程教学中的运用

比较教学法是教师常用的教学方法之一,也是学生掌握知识的一种好方法。在数控编程与操作的实际教学中,我根据课程的特点和多年的教学经验,对一些内容灵活运用了比较教学法,取得了良好的教学效果。通过归纳总结例举如下几种。 纵向比较方式 纵向比较方式常用于相似或相关内容的比较上。我在讲授数控机床坐标系时,以数控车床为例,一边顺序讲解机床坐标系(包括机械零点)、工件坐标系、刀具起始点的基本概念和确立方法,一边同步地在黑板上按顺序画出坐标系示意图,然后从回零操作入手将三者进行纵向比较,指导学生进行泛化,了解它们的主要区别,从而找出它们之间的关联:机床坐标系的原点是确定     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

钱生钱!

我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了