微细切削铣刀的设计要点

May 28th, 2010

微细切削铣刀的设计要点  

    从设计角度分析,微细钨钢铣刀并非传统铣刀在尺度上的简单缩小,而是基于微细切削刀具特征和面向具体加工需求的一类特种铣刀。现以微细立铣刀和钻头为例,说明微细切削铣刀的设计要点和原则。  

    微细立铣削的轴向切削深度和微细钻削的进给量均很小,因此铣刀结构可适当简化。微细立铣刀和钻头不一定需要形状完整的螺旋槽,可以采用单切削刀具的结构形式。为保证铣刀刚度,应尽量减少切削刀具部分长度,长径比不宜过大。  

    钨钢铣刀刃口形状应比较规则且半径较小,以减小数控刀具实际切削时的负前角效应。  

    由于微细立铣刀和钻头的直径较小,容屑槽空间有限,碎状切屑容易发生堵塞而导致铣刀折断,因此可采用涂层或固体润滑膜来减小铣刀与工件之间的摩擦系数,不仅有利于排屑,而且能提高钨钢铣刀耐磨性。  

硬质合金涂层刀具简介

May 28th, 2010

硬质合金涂层刀具

  对刀具进行涂层处理是提高数控刀具性能的重要途径之一。涂层数控刀具是高速切削应用研究中发展速度很快的刀具。涂层刀具是在韧性较好刀体上,涂覆一层或多层耐磨性好的难熔化合物,使刀具既有较高的韧性,又具有很高的硬度和耐磨性,涂层刀具的寿命比未涂层的刀具要高2-5倍。近10年来,数控刀具涂层技术取得了飞速发展,涂层工艺越来越成熟。

  在硬质合金和高速钢刀体上涂敷不同的氮化物、氧化物和硼化物。涂层刀具的涂层物质不同,数控刀具的切削性能也有明显变化,涂层刀具可分为两大类:一类是“硬”涂层刀具,如TiC、TiN、Al2O3涂层刀具等,其主要优点是硬度高、耐磨性能好。另一类是“软”涂层刀具,如MoS2、WS2等,这种涂层刀具也称为自润滑刀具,可以减小摩擦,降低切削力和切削温度。

  金刚石薄膜涂层数控刀具是近年研究成功的新型刀具涂层材料,它采用化学气相沉积(CVD)法在硬质合金基体沉积一层极薄(50  以下)的金刚石膜制成的。这种工艺可在形状复杂的刀具基体制作大面积高质量的金刚石薄膜。CVD金刚石薄膜涂层刀具不仅冲击无涂层硬质合金刀具和陶瓷刀具市场,而且还成为聚晶金刚石刀具强有力的竞争对手。这种涂层刀具特别适合于加工有色金属及纤维材料。最近又开发了纳米涂层技术,特别适合于高速干切削。

缤果网站推广还需时间等待

May 27th, 2010

现在的网站推广走进了我们每个人的生活当中!等待了好久,缤果的网站维护上去了,但是我想网站推广要想上去的话还需要很长一段时间去等待。因为我感觉网站推广这个关键词比它要微微热门一些,做的人多就意味着竞争者多。

看看现在的中国早已经进入到互联网时代,有自己的网站并想做生意的老板谁不看中了互联网这一块呢,这就是一个大蛋糕啊,传统的市场已经成为过去了,赶紧给自己的网站做网站推广。21世纪就是互联网的信息时代来临,你只要掌握了信息,那你就掌握市场的主动权,这也是你想把生意做大做强的最有力的保证。无论你是在世界的哪一个角落,你都可以通过互联网的网站推广来找到你的潜在客户。现在的缤果网站推广只需要更多一点的时间来等待即可。网站推广其实不好说它的价值到底有多大,但它的价值一旦发挥到了极致,那么人在一瞬间发达也不是没有可能的。所以说啊,如果你也有一个属于自己的创意,待到网站建设做成以后,适当做网站推广,最好马上付诸行动,不要让机会留给别人,最后你肯定能在互联网当中占有一席之地。

其实网站推广并没有你想象的那么难,只要你想,找一家网站推广公司,没有什么是做不到的。

情人眼里出西施

May 26th, 2010

Beauty Is in the Eye of the Beholder

摘要:无论男女,婚姻都是他们一生中做出的最重要的抉择之一。男人选择一个女人,是因为在他眼里她是他理想的妻子。每个男人对“理想”的妻子都有自己的定义。

For years men and women have been getting married. They say their wedding vows which bring them together as one. They promise to love and cherish each other until death do them part.

When a man and a woman get married, it is one of the biggest decisions they will make in life. A man may select a woman because he, in his own eyes, sees her as the just-right wife for him. Every man has his own definition of what the “just-right” wife is. For instance, the millionaire man and the poor man both may define their just-right wife according to her physical qualities.

A millionaire may describe his “just-right” wife as charming, beautiful, sexy, intelligent, and well developed. On the other hand, a poor man may define his “just-right” wife as pleasing, attractive, desirable, knowledgeable, and shapely. Both men describe their just-right wife by the same physical qualities but use different words. The millionaire’s definition of the just-right wife is more elegant, whereas the poor man’s definition is a more common, everyday description.

Although some men define the just-right wife by her physical qualities, other men describe their just-right wife by her athletic qualities. For example, the outdoors man may define his just-right wife as a woman who loves to fish, to camp, to hunt, and to water ski, whereas the inside sportsman may define his just-right wife as a woman who enjoys watching football, basketball, baseball, and wrestling. Both of these men define their just-right wife by her sports qualities but in two different atmospheres.

Still, there are other men who have their definitions of the just-right wife. For instance, consider the fit man and the fat man. The fit man may describe his just-right wife as a woman who gets up every weekday morning at six o’clock and runs two to three miles. After running, she prepares breakfast, washes the dishes, takes the children to school, and then goes to work. After work, she arrives home, washes a couple loads of laundry, goes to exercise class, picks the children up from school on her way home, and then cooks dinner. After dinner, she cleans the kitchen, bathes the children, and puts them to bed.

On the other hand, the fat man defines his just-right wife as a woman who gets up at eight o’clock in the morning, takes the children to McDonald’s for breakfast, and drops them off at school. She then comes back home and lies on the couch watching soap operas all day. The children have to walk home from school in the afternoon. When they arrive at home, she instructs them to clean the house, do the laundry, and fix some hotdogs for dinner. Both men define their just-right wife with qualities that they admire within themselves.

Men from all nationalities also have their definition of the just-right wife. For example, the Italian man describes his woman as a woman who stands six feet one-inch tall with blonde hair and blue eyes, and who is well developed in the upper portion of her body. On the other hand, the French man may describe his ideal woman as a woman who stands only five feet three inches with brown hair and green eyes, and who is moderately built.

Other nationalities, such as the German man and the Spanish man, may define their just-right wife as a woman with style. The German man may describe his just-right wife as a woman who likes to drive expensive sports cars, a woman who visits a different foreign country every month and wears only the most expensive designer clothing, but the Spanish man may define his just-right wife as a woman who enjoys giving dinner parties every weekend, wearing a lot of jewelry, and drinking expensive wines.

In addition to the other men’s definitions of the just-right wife, the bachelor also has a definition. He says that the just-right wife is someone else’s wife. He picks her up in a bar, takes her to his house, and takes her home in the morning. The bachelor has no real definition for the just-right wife. That is why he is still a bachelor.

【中文译文】
情人眼里出西施

世世代代,男女结为夫妻。婚礼上的誓言将他们融为一体。他们发誓相亲相爱,至死不渝。

无论男女,婚姻都是他们一生中做出的最重要的抉择之一。男人选择一个女人,是因为在他眼里她是他理想的妻子。每个男人对“理想”的妻子都有自己的定义。比如, 百万富翁和穷人可能都会根据女人的形体特征描绘他们理想的妻子。

一个阔佬描述“理想”的妻子是迷人、美丽、性感、聪明、身材匀称的女人。而一个穷人心目中的“理想”老婆则是招人喜欢、可爱、动人、懂事明理、有身条儿。两者对他们理想妻子形体特征的描述大体相同,但用词却不一样。阔佬对理想妻子的描述更文雅一些,穷人的描述则是较为通俗的常用语。

虽然形体特征是一些男人用来定义他们眼中理想太太的标准,但也不乏根据运动特征来定义的男人。就拿爱好野外运动的男人来说吧,他们认为理想太太应该是钓鱼、野营、狩猎和滑水运动的爱好者;而爱好场地运动的男人眼中的标准太太或许应该是橄榄球、篮球、棒球和摔跤比赛的忠实观众。运动特征是这两类男人定义理想太太的共同标准,但他们各自的侧重范围却不尽相同。

当然,其他男人也有自己的定义。就说身材适中和体态臃肿的男人吧。身材适中的男人会这样描述他的理想太太:她每个工作日六点起床,晨跑两三英里,然后回家准备早饭,洗完碗盘后送孩子上学,再去上班。下班后先回家洗几桶衣服,接着去健美班,回来顺路接孩子放学,到家后准备晚饭。饭后清理厨房,给孩子洗澡,再安顿他们睡觉。

而肥胖男人则认为理想妻子是早上8点起床,带孩子去麦当劳吃早餐,接着开车送他们到学校。然后回家,歪在沙发上看一天的肥皂剧。下午,孩子们得自己步行回家,到家后,她指挥他们打扫房间,洗衣服,做几个热狗当作晚餐。这两种男人以自己所欣赏的特点作为择偶标准。

不同国家的男人对理想的妻子都有自己的标准。比如意大利男人愿意娶身高6英尺1英寸,金发碧眼,上身很丰满的女人做老婆。而法国男人却认为,身高5英尺3英寸,棕发绿眼,体型匀称适中的女人才是理想妻子。

其他国家的男人,如德国男人和西班牙男人,认为完美的妻子应该是个时尚的女人。在德国男人的眼中,理想的太太应该喜欢驾驶昂贵的跑车,每个月都去不同的国家观光,而且只穿最昂贵的名师设计的时装。而西班牙男人则认为理想的太太喜欢每个周末都举办晚宴聚会,浑身珠光宝气,喝名贵的葡萄酒。

对于理想妻子,除了上述的几种定义以外,单身汉也有自己的一套说法。他认为理想的妻子就是别人的老婆。他在酒吧里和她调情,把她带回他的住处,第二天早上送她回家。由于单身汉对理想的妻子并没有一个真正的标准,这正是他至今仍是个单身汉的原因。

网站优化的强竞争性

May 26th, 2010

网站优化的强竞争性存在着必然的联系,现在国内的互联网已经够发达了,纵观着互联网形形色色的网站信息,你就知道网站优化是否有存在的必要了吧。

在未来十年的中国,电子商务的网站优化时代将是家常便饭,如果你想让你的贸易信息能在互联网上占有一席之地,那么你不做网站优化那是不太可以的了,因为想做竞价网站推广的可能你又做不起,而你又想跟大公司,有实力的网站优化公司竞争你就必须要做网站优化,也就是做搜索引擎优化(SEO)。这个过程呢你得先有一个自己的网站建设信息,再找一个上海高端网站建设公司或者上海设计公司把你的网站做好了,最后稍微做点网站维护工作,你的网站建设信息就可以上线,也就是可以在互联网上访问了。由于网站优化的强竞争性,你不得不如此,除非你并没有想过要在互联网上占有一席之地你的网站信息。

其实网站优化的这个道理都一样,有一句话不是说,不管你进入哪一个行业,都是先进的有肉吃,后进的连汤都没得喝,我觉得在这信息技术时代,这话太对了,网站优化的强竞争性决定了现在总是要淘汰一部分人和公司。

等宠物网站做好就做网站维护

May 24th, 2010

我现在正在为我的宠物服务网站维护做准备,资料也在收集中。我想正我的宠物网站做好了就做些网站维护方面的工作吧。没有什么更加复杂的想法,只是驻防我的网站会受到攻击啊。

虽然现在我的宠物服务网站还只是属于网站建设阶段,但是过不了多久,这个网站维护的事情就完成任务了,除此之外,我还要花点钱买我的宠物网站域名,这个大概要花一百四十多块钱,虽然也有便宜点的域名,但是我想要个好记一点的域名。网站维护的另一个任务是买空间,这个空间大概又花去四百多块钱这样,等网站建设和域名解析一弄好,那就可以把我的网站放到空间里面去了啊。这一步弄完了,我的网站维护也算是弄完了吧。到此为止,我的宠物服务网站的网站维护也算是告一段落了吧。

不管花多少钱,那些是要做网站维护必须要花的钱,怎么可能不注意呢,如果连这点都在乎的话,那我在想做这个网站就没有多大的必要了啊。当然如果网站维护做完以后还能做网站优化就是最好不过了啊。因为我觉得做网站优化的价值其实是不可估计的了。

上海高端网站建设知多少

April 2nd, 2010

上海高端网站建设知多少呢,所谓高端网站建设,主要是关系到一些技术含量比较高的东西,这类型的网站建设不是所有的公司都可以做到的。

上海高端网站建设最起码的技术内容主要是:有点创意性的东西,这一点主要是指设计方面的内容,成为一家上海设计公司。别人想不到的东西,你能想得到,别人做不到的东西,你可以做得到,别人做得出来的东西,你能做得更好。这样的要求,我想能称得上高端网站建设了吧。

那么在上海高端网站建设公司能做到的内容,我想以下东西是离不开的:网站建设、网站优化、网站推广、网站维护、至少从头到尾业务内容应该全部包括在内的,也是最起码的吧。

Imagine if there was a FEDERAL DMV, which there isn’t, but if there was, what would it be called? dmv.gov?

January 27th, 2010

The answer is mysterious, since DMV is an acronym for “Department of Motor Vehicles”, which only approximately 23 states out of the entire 50 or so states, use the acronym abbreviation for the Department of Motor Vehicles agency.

Each State is individually run at the STATE-LEVEL, so therefore, the state is responsible, but each state doesn’t govern every other state, nor does the FEDERAL LEVEL do so at all.  But if the FEDERAL level was involved, then ofcourse, there would be a CENTRALIZED, one-license system.

What is definitely funny is that PEOPLE PAY state taxes & federal taxes.  It’s like, you’re paying twice.

Why pay federal, if you are under the impression that FEDERAL is suppose to take care of the required maintenance issues for your state.  Doesn’t make sense that you have to pay FEDERAL & STATE.

Also, when the FEDERAL/STATES want you to improve JOBS, or CREATE MORE BUSINESSES, it’s because this way they can collect the taxes, but, how interesting is, if you ask them for FUNDING, they won’t give you any money, they instead, only want your money if you make it on your own.  This is a ONE-SIDED direction, very very imbalanced.