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CNC Introduction

hoe to work cnc
its function
working
advantage
disadvantage
conclusion

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CNC Introduction

  1. 1. Dr. D. Y. PATIL SCHOOL OF ENGINEERING&TECHNOLOGY INTRODUCTION OF COMPUTER NUMERICAL CONTROL MACHINE (CNC) By, ) Under the guidance of, Prof..
  2. 2. INTRODUCTION CNC Machines What is a CNC Machine? CNC : Computer and Numeric Control Conventionally, an operator decides and adjusts various machines parameters like feed , depth of cut etc depending on type of job , and controls the slide movements by hand. In a CNC Machine functions and slide movements are controlled by motors using computer programs.
  3. 3. Basic CNC Principles •Each axis consists of a mechanical component, such as a slide that moves, a servo drive motor that powers the mechanical movement, and a ball screw to transfer the power from the servo drive motor to the mechanical component. • CNC can control the motions of the workpiece or tool, the input parameters such as feed,depth of cut, speed, and the functions such as turning spindle on/off, turning coolant on/off.
  4. 4. Features of CNC Machinery • The tool or material moves. • Tools can operate in 1-5 axes. • Larger machines have a machine control unit (MCU) which manages operations. • Movement is controlled by a motors (actuators). • Feedback is provided by sensors (transducers) • Tool magazines are used to change tools
  5. 5. APPLICATION •In the machine tool category, CNC is widely used for, 1. Lathe 2. Drill press 3. Milling machine 4. Grinding unit 5. Laser Cutting 6. Sheet-metal press 7. Tube bending machine etc.
  6. 6. TOOLS USED IN CNC • Most are made from high speed steel (HSS), • tungsten carbide or ceramics. • Tools are designed to direct waste away from the material. • Some tools need coolant such as oil to protect the tool and work.
  7. 7. ADVANTAGES 1. high accuracy in manufacturing 2. short production time 3. greater manufacturing flexibility 4. simpler fixturing 5. contour machining (2 to 5 –axis machining) 6. reduced human error
  8. 8. DISADVANTAGE 1. Costly setup 2. Skilled operators 3. Computers, programming knowledge required 4. Maintenance is difficult
  9. 9. Thank You

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