Archive for 4 月, 2010

Recognize Where the Waste Is 看”牛人”如何管理自己时间

火曜日, 4 月 27th, 2010

In order to begin a time management program, you need to pinpoint exactly where you are wasting the most time. Likely, there will be many areas where you need better time management. Look at those areas and start working on them every day. Slacking off here or there won’t help you. Be rigid.

了解时间浪费在哪里

开始你的时间管理程序,你要非常精确的找出在什么地方你浪费了大量的时间。你很可能在许多地方更好的管理你的时间,审视这些,开始每天在这些事务上用心,对待任何事情都不要懈怠,那样对你是没有好处的。一定要严格要求自己。

Get Some Tools

Getting your life organized will help your time management because you won’t have to think about what is coming up next on your schedule. You can also look up directions if you have a meeting, what restaurants are nearby, and a million other handy things to save yourself some time. Some people use their iPhone for these functions and some still use the Palm Pilot system. Whatever you use, make sure you can surf the net and plug in your daily schedule at ease.

获得工具

井井有条的生活是有益于你管理时间的,因为这样你就不必去想接下来要做什么。你也可以查看自己的计划表,是否有会议要参加,要去附近的哪个餐馆,还有无数其他的琐碎的事情,随时查看自己的时间安排,这会节省你的时间。一些人用iPhone,也有一些人用Palm,无论你用什么工具,都要保证你能随意的添加你的日常事务的时间计划。
 
Multi-Task While Eating

Eating while just staring at the wall is a great time waster. Which is not a good thing. At least check your e-mail or read over a project you have to work on in the afternoon while you are munching your way through that tuna sandwich. If you read (dork!) in your free time, do it during lunch to give you some extra time later when you are usually reading.

吃饭时多做点别的事情

吃饭时仅仅盯着墙面,对时间是巨大的浪费。这是很不好的事情。这个时候你至少可以查看自己的邮件,或者在你大口咀嚼三明治的时候想想自己下午要做什么事情。如果你在自己闲暇的时候读书–这真是太愚蠢了–把这些事情放到午餐的时候吧,为接下来的事务多留点时间,等到你真的闲暇的时候在去读书吧。

Plan Ahead

Each night, there needs to be a moment where you review what will be happening the next day. If you have somewhere to be at 8:30am, plan accordingly. Set your alarm to wake up earlier. Plan your route to avoid as much of the morning traffic rush as possible. It will only take a couple of minutes to refer to your schedule, but will save you tons of time the next day.

提前计划好

每天晚上花一点时间想想明天将要做什么,如果你要在八点半到达到某个地方,协调好你的计划。将你的闹钟设置的时间稍微提前一点,计划好你的路线,尽可能避免早上塞车。虽然这会花你几分钟时间来考虑,但是这会为你明天有效地节约时间。

Priorities

Making sure you are attacking a task in the order it should be conquered is also key to managing your time. Alphabetizing your record collection instead of doing your taxes is probably not a smart move. Make a list of things you need to do — no matter how small — and put them in order. You can then attack projects and tasks as they move up the list instead of trying to do pieces of projects at the same time. That just keeps you unfocused and wasting time.

优先考虑的事情

确保你的计划井井有条,让它有说服力,这也是合理安排时间的关键。收集音乐磁盘而不去完成你的税务很明显是不明智计划。将你要做的事情–无论是多么小的事情–都一一按顺序列在单子上。这样你就可以开始构建你的时间安排了,优先考虑一些事你就不会浪费时间做一些琐碎的事情了,这样你就不会一下子有过多的事情聚到一起浪费你的时间。

数控刀具的分类及应用的研究

火曜日, 4 月 27th, 2010

数控刀具的分类及应用的研究
[摘要]数控刀具行业的空前发展,使数控刀具样式繁多,对其进行合理划分和对其应用条件和场合的分析是很有实际意义的。 

  [关键词]数控刀具 分类 应用 
  中图分类号:TG21文献标识码:B文章编号:1671-7597 (2008) 0110042-01 
   
  近年来,随着数控机床的不断发展,数控机床刀具种类越来越多,其划分也越来越细,但无论样式如何改变,从总体上看,数控刀具加工必须适应数控机床高速、高效和自动化程度高的特点,而数控刀具中又以数控刀具应用最为广泛,现就目前数控刀刀具的类型总结如下。 
   
  一、数控刀具的分类 
   
  (一)按制造数控刀具所用的材料可分为 
  1.高速钢刀具; 
  2.硬质合金刀具; 
  3.金刚石刀具; http://www.speedtiger.com.cn/
  4.其他材料刀具,如立方氮化硼刀具、陶瓷刀具等。 
  (二)按数控刀具结构形式不同可分为 
  1.整体式:将刀具和刀柄制成一体。 
  2.镶嵌式:可分为焊接式和机夹式。 
  3.减振式当刀具的工作臂长与直径之比较大时,为了减少刀具的振动,提高加工精度,多采用此类刀具。 
  4.内冷式:切削液通过刀体内部由喷孔喷射到刀具的切削刃部; 
  5.特殊型式:如复合刀具、可逆攻螺纹刀具等。 
  (三)按数控刀具结构形式不同可分为 
  1.面刀具(也叫端刀具):面刀具的圆周表面和端面上都有切削刃,端部切削刃为副切削刃。面刀具多制成套式镶齿结构和刀片机夹可转位结构,刀齿材料为高速钢或硬质合金,刀体为40Cr。钻削刀具,包括钻头、铰刀、丝锥等; 
  2.模具刀具:模具刀具由立刀具发展而成,可分为圆锥形立刀具、圆柱形球头立刀具和圆锥形球头立刀具三种,其柄部有直柄、削平型直柄和莫氏锥柄。它的结构特点是球头或端面上布满切削刃,圆周刃与球头刃圆弧连接,可以作径向和轴向进给。刀具工作部分用高速钢或硬质合金制造。 
  3.键槽刀具:用于铣削键槽。 
  4.成形刀具:切削刃与待加工面形状一致。 切削刀具