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    • CommentAuthorfab
    • CommentTimeNov 7th 2007 edited
     
    So .. jetzt also hier im Netz weiter zum Magister diskutieren.
    Als erstes müsst ihr euch dafür registrieren, und das geht hier:

    http://magister.odd-fish.de/people.php?PostBackAction=ApplyForm

    Ich will da nicht viel wissen von euch. Die eMail ist nur, um euch ein vergessenes Passwort zuzuschicken. Mehr nicht!
    Danach könnt ihr Posts schreiben: http://magister.odd-fish.de/post.php .. weiterführen und sogar Dateien hochladen.

    Bei Fragen schreibt mir eine eMail an fab at fabianklenk punkt info .. oder ihr postet sie hier :)

    Ich hoffe, dass es hier auch genutzt wird ..
    • CommentAuthorAnnegret
    • CommentTimeNov 8th 2007
     
    Hallo!
    An dieser Stelle vielen Dank an Fabian für das Einrichten des Forums :)

    Nachdem ich Nachzügler war am Dienstag und nicht recht weiß, welche Themen vertreten sind, stelle ich einfach mal meine momentane Liste mit rein, vielleicht gibts ja Überschneidungen!

    Gutes Durchhalten euch allen!
    • CommentAuthorfab
    • CommentTimeDec 3rd 2007
     
    ich hab eine neue Funktion hinzugefügt zum Forum. Jeder sollte jetzt eine eMail bekommen, wenn irgendetwas im forum neu geschrieben wird. dies kann jeder einzelne für sich wieder ausstellen links unter notification. sollte selbsterklärend sein .. wenn nicht, email :)

    bis dahin .. gute letzte lerntage .. fab
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    • CommentTimeJul 30th 2012
     
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    • CommentTimeJul 30th 2012
     
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    • CommentTimeJul 30th 2012
     
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    • CommentTimeJul 30th 2012
     
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    • CommentAuthordmfusa
    • CommentTimeJan 15th 2020 edited
     
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    • CommentAuthoryanyan
    • CommentTimeAug 21st 2020
     
    sputtering ion pump type selection

    When the inert gases such as argon, krypton and xenon are eliminated by the two-stage sputtering ion pump, the argon pressure will rise and then decrease suddenly in the vacuum system, and the pressure change range is 10-2 PA. This phenomenon is called argon instability. The instability of argon in two-stage ion pump after exhausting for hundreds of hours at 10-3pa or thousands of hours at 10-4Pa is given. In order to overcome this phenomenon, several improved structures of various improved sputtered ion pumps have been developed

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    • CommentAuthoryanyan
    • CommentTimeAug 21st 2020
     
    Mistakes in use of roots pump

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    • CommentAuthoryanyan
    • CommentTimeAug 21st 2020
     
    Working substance of vacuum system

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    • CommentAuthorwfuuopy
    • CommentTimeSep 9th 2020
     
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    • CommentAuthoryanyan
    • CommentTimeJun 17th 2021
     
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    • CommentTimeJul 29th 2021
     
    How PBX Phone Systems Can Be an Asset to Your Small Business

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    • CommentAuthorlovemodel
    • CommentTimeAug 5th 2021
     
    • CommentAuthorMichael Ma
    • CommentTimeSep 23rd 2021
     
    How Do You Compare Up Milling And Down Milling For CNC Machining
    Up milling and down milling are two common CNC Milling  methods in CNC machining. Many people don’t understand the difference between them. Today’s article will talk about the difference between up milling and down milling. https://www.jtrmachine.com/pages/cnc-milling-service.html

    The cutting edge of the milling cutter will be subjected to impact load every time it cuts in. In order to successfully milling, we must consider the correct contact mode between the cutting edge and the material when the cutting edge cuts in and cuts off in a cutting. In the milling process, the workpiece is fed in the same or opposite direction along the rotation direction of the milling cutter, which will affect the cutting in, cutting and whether to use up milling or down milling.
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    The Golden Rule Of Milling – From Thick To Thin
    When milling, the formation of cutting must be considered. The decisive factor of cutting formation is the position of the milling cutter. It is required to form thick chips when the cutting edge cuts in and thin chips when the cutting edge cuts out, so as to ensure a stable milling process. Be sure to remember the golden rule of milling “from thick to thin” to ensure that the chip thickness is as small as possible when the blade is cut out.
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    In up milling, the cutting tool feeds in the direction of rotation. As long as the machine tool, fixture and workpiece allow, up milling is always the preferred method. In edge up milling, the chip thickness will gradually decrease from the beginning of cutting and finally reach zero at the end of cutting. In this way, the cutting edge can avoid scratching and rubbing the part surface before participating in cutting.
    Large chip thickness is advantageous, and the cutting force tends to pull the workpiece into the milling cutter to keep the cutting edge cutting. However, because the milling cutter is easy to be pulled into the workpiece, the CNC machine tool needs to eliminate the backlash to deal with the feed gap of the worktable. If the milling cutter is pulled into the workpiece, the feed will increase unexpectedly, which may lead to excessive chip thickness and fracture of the cutting edge. Back milling should be considered at this time.
    Down Milling
    In down milling, the feed direction of the cutting tool is opposite to its rotation direction. The chip thickness increases gradually until the end of cutting. The cutting edge must be forcibly cut in, resulting in scratching or polishing due to friction, high temperature and frequent contact with the work hardened surface caused by the front cutting edge. Will shorten the life of CNC tools.
    The thick chips and high temperature produced by the cutting edge will lead to high tensile stress, shorten the tool life, and the cutting edge will usually be damaged quickly. It may also cause chips to stick or weld to the cutting edge, which will then carry them to the starting position of the next cutting, or cause the cutting edge to collapse instantaneously.
    The cutting force tends to push the milling cutter and the workpiece away from each other, while the radial force tends to lift the workpiece from the workbench. When the machining allowance changes greatly, down milling is better. down milling is also used when machining superalloys with ceramic blades, because ceramics are sensitive to the impact when cutting into the workpiece.
    Feed Direction Of Workpiece Fixture Tool
    Different requirements are put up for workpiece fixture. It should be able to resist the lifting force during the down milling process. It should be able to resist downforce during down milling.
    Comparison Between Up Milling And Down Milling