1. Prepared by: Dr. Mohamed Ahmed Awad
CNC
11/12/2018
Lab # 6

2. CNC machine tools Computerized Numerical Controlled machine tools
Prepared by: Dr. Mohamed Ahmed Awad
11/12/2018

3. Production types
Prepared by: Dr. Mohamed Ahmed Awad
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4. Types of production Systems
Prepared by: Dr. Mohamed Ahmed Awad
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5. Prepared by: Dr. Mohamed Ahmed Awad
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6. Using CNC machine tools
Prepared by: Dr. Mohamed Ahmed Awad
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7. Traditional
Prepared by: Dr. Mohamed Ahmed Awad
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8. Computerized
Prepared by: Dr. Mohamed Ahmed Awad
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9. Mass production of screw
Prepared by: Dr. Mohamed Ahmed Awad
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10. CNC machine tools Computerized Numerical Controlled machine tools
Prepared by: Dr. Mohamed Ahmed Awad
11/12/2018

11. Numerical Versus Digital
1, 2,3,…..
Numeric
1, 2,3,… & A, B, C
Prepared by: Dr. Mohamed Ahmed Awad
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12. Open Versus Close loop Control
Prepared by: Dr. Mohamed Ahmed Awad
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13. Manual versus Mechanized
Prepared by: Dr. Mohamed Ahmed Awad
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14. Open versus closed
Prepared by: Dr. Mohamed Ahmed Awad
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15. Manual closed versus mechanized close
Prepared by: Dr. Mohamed Ahmed Awad
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16. Prepared by: Dr. Mohamed Ahmed Awad
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17. A Definition:
Numerical Control is a system in which actions are controlled by the direct insertion of numerical data at some point. The system must automatically interpret at least some portion of the data
11/12/2018
Prepared by: Dr. Mohamed Ahmed Awad

18. Types of Numerical Control
Conventional Numerical Control (NC)
Computer Numerical Control (CNC)
Direct Numerical Control (DNC)
11/12/2018
Prepared by: Dr. Mohamed Ahmed Awad

19. Conventional Numerical Control (NC)
Data is sent to the machine tool by means of punch cards or tapes. The reader at the machine performs no calculations or interpolations.
11/12/2018
Prepared by: Dr. Mohamed Ahmed Awad

20. Computer Numerical Control (CNC)
The idea of computer numerical control is to position a computer right at the machine tool. Most, if not all machine tools that are numericaly controlled are CNC machine tools.
Prepared by: Dr. Mohamed Ahmed Awad
11/12/2018

21. Computer Numerical Control (CNC)
Prepared by: Dr. Mohamed Ahmed Awad
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22. Difference between conventional and CNC
Prepared by: Dr. Mohamed Ahmed Awad
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23. Prepared by: Dr. Mohamed Ahmed Awad
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24. Prepared by: Dr. Mohamed Ahmed Awad
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25. CNC Control Panel
They can enter new program by using this panel, programs can be transferred by using USB port on this panel as well. So this is the main part which controls the whole CNC machine.

26. Tool Turret
The tool are mounted on the tool turret which are used for component machining. Tool turrets vary in shapes and number of tools that can be mounted on them.

27. Ball screw
Prepared by: Dr. Mohamed Ahmed Awad
11/12/2018

28. Ball Screw
Lecture 1: Introduction
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29. Machine guide ways
Lecture 1: Introduction
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30. Linear Scale
Prepared by: Dr. Mohamed Ahmed Awad
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31. Machine guard
Lecture 1: Introduction
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32. Prepared by: Dr. Mohamed Ahmed Awad
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33. Advantages
Reduces time for delivery of part Reduces scrap rate of material
Reduces tooling costs
Reduces layout time
Increases machine and tool life
Reduces storage problems
Less setup time
Reduces actual machining time Allows rapid design changes in part Less jigs and fixtures are needed
Prepared by: Dr. Mohamed Ahmed Awad
11/12/2018

34. NUMERICAL DATA (NC CODE) NUMERICAL CONTROLLER MANUFACTURING OPERATOR
Drive Control
PROCESSED
PART
MACHINE UNIT
11/12/2018
Prepared by: Dr. Mohamed Ahmed Awad

35. Types of control Position control Linear Interpolation
Circular interpolation
3 Axis control
Prepared by: Dr. Mohamed Ahmed Awad
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36. Positional Control
Prepared by: Dr. Mohamed Ahmed Awad
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37. Linear Interpolation
Prepared by: Dr. Mohamed Ahmed Awad
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38. Circular Interpolation
Prepared by: Dr. Mohamed Ahmed Awad
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39. 3 Axis Control
Prepared by: Dr. Mohamed Ahmed Awad
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40. Five Axis machine tool
Prepared by: Dr. Mohamed Ahmed Awad
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41. Seven Axis CNC machine tools
Prepared by: Dr. Mohamed Ahmed Awad
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42. Manufacturing Automation
Lecture 1: Introduction
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43. Principles of CNC Programming
Programming CNC machine Tools
Principles of CNC Programming 43
Prepared by Dr. Mohamed Ahmed awad

44. Programming Methods Manual Programming ( G and M codes)
Automatic Programming Languages (APT)
CAM Based Programming
Conversational Programming
Prepared by Dr. Mohamed Ahmed awad

45. Manual Programming
Prepared by Dr. Mohamed Ahmed awad

46. Design Spec Programming Machine
Lab6: Roundness Test
11/12/2018

47. Structure of an NC Part Program:
Prepared by Dr. Mohamed Ahmed awad

48. Word Address Format
Prepared by Dr. Mohamed Ahmed awad

49. G codes (preparatory functions)
Prepared by Dr. Mohamed Ahmed awad

50. Motion Functions
Prepared by Dr. Mohamed Ahmed awad

51. Axes Commands
Prepared by Dr. Mohamed Ahmed awad

52. Types of Programming concepts
Simple
Using low level, line and arc
Cycle
Using Cycle
Advanced
Using Subroutines, mirror, etc
Prepared by Dr. mohamed Ahmed Awad

53. Summary of word address characters
Programming CNC machine Tools
Summary of word address characters 53
N Sequence number for data block
G Preparatory function
X Amount of X axis travel
Y Amount of Y axis travel
Z Amount of Z axis travel
A angle rotation about X axis
B angle rotation about Y axis
C angle rotation about Z axis
R Clearance plane for fixed cycles
I Arc center coordinate parallel to X axis
J Arc center coordinate parallel to Y axis
K Arc center coordinate parallel to Z axis
Prepared by Dr. Mohamed Ahmed awad

54. Prepared by: Dr. Mohamed Ahmed Awad
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55. Automatic Programming APT
Prepared by Dr. Mohamed Ahmed awad

56. Automatic Programming
Programming CNC machine Tools
Automatic Programming 56
Prepared by Dr. Mohamed Ahmed awad

57. Design Spec Programming Machine
Lab6: Roundness Test
11/12/2018

58. Groups of Statements in APT
Programming CNC machine Tools
Groups of Statements in APT
( Geometry statement)
(Motion statement)
(Post-processor statement)
(Auxiliary statement) .
Prepared by Dr. Mohamed Ahmed awad

59. Programming CNC machine Tools
APT Program Example
PARTNO, DRILL 3 HOLES ;defines part name
MACHIN/P & W HORIZON V ;defines machine part
SETPT= POINT/0,0,0 ;defines home position of tool
CUTTER/ ;defines the outer diameter
P = POINT/2.0, ;define location of hole 1
P2 = POINT/3.0, ;define location of hole 2
P3 = POINT/3.0, ;defines location of hole 3
SPINDL/764 CLW ;spindle speed 764 r/min. clockwise
FEDRAT/7640 ;feed rate 764 in./min.
COOLNT/ON ;turn coolant on
FROM/SETPT ;defines the initial location of cutter
Prepared by Dr. Mohamed Ahmed awad

60. Programming CNC machine Tools
GOTO/P1 ; move cutter to hole 1
GODLTA/0,0,-1 ; move tool down to drill hole 7
GODLTA/0,0,1.0 ; move tool up
GOTO/P2 ; move cutter to hole 2
GODLTA/0,0,-1.0 ; move tool down to drill hole 2
GOTO/P3 ; move cutter to hole 3
GODLTA/0,0,-1.0 ; move tool down to drill hole 3
GODLTA 0,0,1.0 ; move tool up
RAPID
GOTO/SETPT ; go back to the home position
COOLNT/OFF ; turn coolant off
FINI ; termination of part program
Prepared by Dr. Mohamed Ahmed awad

61. CAM based Programming
Prepared by Dr. Mohamed Ahmed awad

62. Design Spec Programming Machine
Lab6: Roundness Test
11/12/2018

63. Prepared by: Dr. Mohamed Ahmed Awad
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64. Prepared by: Dr. Mohamed Ahmed Awad
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65. Prepared by: Dr. Mohamed Ahmed Awad
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66. CAM based Programming
Prepared by Dr. Mohamed Ahmed awad

67. Drawing Exchange Format
Programming CNC machine Tools
Drawing Exchange Format
Prepared by Dr. Mohamed Ahmed awad

68. Drawing Exchange Format
Programming CNC machine Tools
Drawing Exchange Format 68
Prepared by Dr. Mohamed Ahmed awad

69. Post Processor
Prepared by Dr. Mohamed Ahmed awad

70. Prepared by Dr. Mohamed Ahmed awad

71. Conversational Programming
Prepared by Dr. Mohamed Ahmed awad

72. Design Spec Programming Machine
Lab6: Roundness Test
11/12/2018

73. Conversational Programming
Prepared by Dr. Mohamed Ahmed awad

74. Conversational Programming
Prepared by Dr. Mohamed Ahmed awad

75. Prepared by: Dr. Mohamed Ahmed Awad
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76. Prepared by: Dr. Mohamed Ahmed Awad
11/12/2018