Fundamental of CAM.ppt
- 1. TSSM’S BHIVARABAI SAWANT COLLEGE OF ENGINEERING AND RESEARCH , POLYTECHNIC, NARHE,PUNE-41 Department Of Mechanical Engineering Course : Advancedmanufacturingprocess(22563) Unit 4 : Fundamental of Computer Aided Manufacturing (CAM) ( 12 Marks) C563.1 : Maintain CNC machine to produce components effectively.
- 4. Application of NC Machine
- 5. Advantages of NC Machine
- 6. Disadvantages of NC Machine
- 8. Features of CNC Machine • Storage of more than one part program • Various forms of program input • Program editing at the machine tool • Fixed cycle and programming subroutines • Cutter length and size compensation • Acceleration and deceleration calculations • Communication interface • Diagnostics
- 9. Advantages of CNC Machine
- 10. Disadvantages of CNC Machine
- 11. Applications of CNC Machine • Industries for removing metal • Industries for fabricating Metals • Electrical Discharge Machining • Other Industries where CNC machines are used
- 12. Main Components of CNC Machine CNC will consist of the following basic elements • Program of instruction • Machine control unit • Machine tool Program of instruction • The part program is called as program of instruction. • It is prepared by the part programmer. • It is the detail step-by-step set of instructions which tells the machine tool what to do • The part program is a combination of numbers and letters and is fed to the controller. • It is generally input to through the keyboard manually.
- 13. The Machine Control Unit (MCU) The MCU consists of the following components and subsystem 1. Central Processing Unit 2. Memory 3. Input/ Output Interface Central Processing Unit: • The central processing unit (CPU) is the brain of the MCU • It manages the other components in the MCU based on software contained in main memory The CPU can be divided into three sections: a) Control section b) Arithmetic-logic unit c) Immediate access memory Memory: a) Primary memory: b) Secondary memory: Input / Output Interference
- 14. Machine Tool
- 15. DIRECT NUMERICAL CONTROL Components of DNC System • Central computer • Bulk memory, which stores the NC part programs • Telecommunication lines • Machine tools • Behind-the-tape-Reader (BTR) System Fig. DNC machine Fig. Special Machine Control Unit
- 16. Function Of DNC
- 18. Types of CNC Machines 1. CNC Milling Machine 2. CNC Lathe Machine 3. CNC Router Machine 4. CNC Plasma Cutting Machine 5. CNC Laser Cutting Machine
- 19. Classification of CNC Machines
- 20. Based on control system characteristics 1. Point – to – Point System
- 22. Contouring System Fig. Continuous Path Control System
- 23. Based on Feedback System 1. Open Loop Control System
- 24. 2. Closed Loop Control System
- 26. Selection Criteria 1. Current Machine Tool Set-up 2. Part Difficult and Complexity 3. Material to be Machined 4. Linear Motion Guide Ways or Box Guide ways 5. Types of CNC control system 6. Cost per part 7. Available Space At Factory Elements of CNC Machines Slide ways Types of Slide ways 1. Hydrostatic Type Slide ways 2. Anti-friction type slide ways
- 27. Hydrostatic Type Slide Ways
- 28. Anti-friction Type Slide Ways
- 31. Inductosyn