صفحة 1 من 2 1 2 الأخيرةالأخيرة
النتائج 1 إلى 10 من 13

الموضوع: تعريف عن ال cnc

  1. #1
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي تعريف عن ال cnc

    bismilah

    NC
    Numerical Control. A form of programmable automation in which the machine tool is controlled by punched tape. NC code contains a program of instructions and commands, which consists of numbers, letters, and other symbols. See also CNC
    CAD
    Computer Assisted Design. A computer based design and drafting tool. See CAM
    CAM
    Computer Assisted Manufacturing. In general, CAM uses a computer to assist in any or all phases of manufacturing. But more specifically CAM in the machine shop deals with automatic programming of CNC machinery. See also CAD



    Card reader
    A machine that reads punched cards into a computer.





    Center
    1) A point around which anything revolves or rotates.
    2) In the machine shop this often refers to a centering device usually affixed to the tailstock of a lathe, which is used to support a work piece with a pre-drilled center hole. The center and the pre-drilled hole have 60 degree included angles. The center usually has a Morse taper on the opposite end for snug fitting into the tailstock. Live-centers have ball bearings for rotation. Dead centers do not rotate and require lubrication. The top image is a dead center. The bottom image is a live-center.




    Center cutting end mill

    An end mill that is capable of axial as well as radial cut. Two opposing cutting flutes are so close together that the mill can act as a drill. Below left is a center cutting end mill. Below right is a hollow coolant-flow end mill capable of side cutting but not down cutting.


    Chamfer


    To bevel an edge. This can be a straight edge, curved edge, or a hole
    .



    Chamfer gage
    Tool used to measure the width of chamfers/countersinks at the top of a hole.






  2. #2
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي رد: تعريف عن ال cnc


    Chuck
    Work holding device that is mounted on a lathespindle, drill press spindle, or milltable to hold and revolve a work piece or cutting tool.

    Clamp, edge
    An edge clamp is any of a number of different clamps that hold the work piece by “pinching” sideways instead of by tightening downward. The edge clamp shown uses a dovetail arrangement that forces the end piece down a ramp via a socket screw. This closes lateral distance

    .
    Clamp, radius end
    A common strap used as a work holder


  3. #3
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي رد: تعريف عن ال cnc

    Acme
    .

    An internal or external type of screw thread that has an included angle of 29 degrees. Acme threads are used on most vertical milling machines as they are very strong and can compensate for wear. See also unified screw thread, whitworth,American national form

    American National Thread Form
    An American standardthread used in U.S. industry. See also unified screw thread, acme, whitworth


    American Standard Taper Pipe Thread
    An American standard pipe thread used in U.S. industry.
    Pipe tap shown

    Angle
    The space between two lines diverging from a common point and expressed in numerical form. See degree




    Automatic bar feeder

    A bar feeder that incrementally feeds a single long bar of round stock through the spindle of a CNC lathe. A CNC M code actuates the bar feeder directly from the parts program. When one length of bar is used up another is automatically placed in the system.



  4. #4
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي رد: تعريف عن ال cnc

    Axis
    A reference line from which distances or angles are measured in a the Cartesian coordinate system. In the picture below these lines are labeled X, Y, and Z.
    1) A straight line about which a body or geometric object rotates or may be conceived to rotate. In the picture below the rotational axes are labeled A (rotation about the
    X axis), B (rotation about the Y axis), and C (rotation about the Z axis).

    Glossary D
    Data
    For a CNC machine tool or a PC data is information in numerical form that can be digitally transmitted or processed. In a statistical sense data is factual information such as measurements used as a basis for discussion or calculation






    Datum

    A reference point from which movements or measurements are made. A datum can lie anywhere on the surface of a work piece. A datum can be a coordinate but does not have to have a physical feature.

    Depth micrometer
    A micrometer used to measure the depth of slots, steps, and other features.



    Dial caliper
    A caliper-like measuring device which uses a rack and pinion to move an indicator dial. Usually one revolution of the dial denotes .100 inch of movement.

    A reference point from which movements or measurements are made. A datum can lie anywhere on the surface of a work piece. A datum can be a coordinate but does not have to have a physical feature.

  5. #5
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي رد: تعريف عن ال cnc

    Digital Read Out (DRO)
    An electronic instrument consisting of a set of very precise linear scales that are attached to the axis or slides of a machine. Optical readers read positional data and display it digitally.




    Dog
    A driver that is clamped to a rotating work piece and used to rotate it with the spindle. Usually driven by a face plate.



    a twist drill used to make holes.
    2) the process of drilling using a drill with two cutting edges ( as a twist drill) to make a hole in firm material..

  6. #6
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي رد: تعريف عن ال cnc

    Drill press
    A machine designed to rotate and feed end-cutting tools for drilling, reaming, tapping, countersinking, counter boring, spot facing, and boring operations. Similar to a vertical mill except the drill press does not have an articulated worktable.

  7. #7
    مهندس
    تاريخ التسجيل
    Jun 2006
    المشاركات
    80

    افتراضي رد: تعريف عن ال cnc

    Parallels
    A set of steel bodies ground to exact likeness in size and parallelism. They are often used for machine and inspection setups.
    greet tknk@@
    wafk من اخيكم عبدالظاهر

  8. #8
    مهندس بارز الصورة الرمزية eng-kareem
    تاريخ التسجيل
    Jan 2007
    الدولة
    cairo
    المشاركات
    224

    افتراضي رد: تعريف عن ال cnc

    جزاك الله خير باهندسة

    شكرا عالموضوع المفيد

  9. #9
    مهندس نشيط
    تاريخ التسجيل
    Oct 2006
    المشاركات
    125

    افتراضي

    الف شكر ياهندسة
    وجزاك الله خيرا

  10. #10
    مهندس
    تاريخ التسجيل
    Oct 2007
    المشاركات
    1

    افتراضي

    وفيت وكفيت وبارك الله بيك ,وشكرا على الموضوع البديع

صفحة 1 من 2 1 2 الأخيرةالأخيرة

المفضلات

المفضلات

ضوابط المشاركة

  • لا تستطيع إضافة مواضيع جديدة
  • لا تستطيع الرد على المواضيع
  • لا تستطيع إرفاق ملفات
  • لا تستطيع تعديل مشاركاتك
  •