MR4002 Digital Manufacturing Syllabus:
MR4002 Digital Manufacturing Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES
1. To learn the concept of NC and CNC technologies on practical problems with feedback and adaptive control.
2. To learn the configuration of CNC system, PLC programming for CNC and also case studies on machine structure elements.
3. To learn the mechatronics elements in CNC measuring system and tooling system, EEPROM tools, automatic tool changing system, tool magazine and sensors in CNC.
4. To learn about the CNC programming tools with computer assisted programming using APT, generation and execution of APT programs.
5. To learn the methods for verification, testing and Maintenance of CNC machines during idle running and machine tooling.
UNIT I INTRODUCTION OF NC, CNC, DNC AND ADAPTIVE CONTROL
Classification of machine tools – types, functions and processes – fundamentals of NC and CNC technologies Adaptive control – types, application and benefits – general configuration of adaptive control and function – reasons for process change – practical problems with adaptive control – example for feedback and adaptive control.
UNIT II MECHATRONIC ELEMENTS IN CNC MACHINE TOOLS
CNC systems – configuration of the CNC system – interfacing – monitoring – diagnostics – machine data – compensations for machine accuracies – PLC in CNC – PLC programming for CNC, steps in programming and case studies – machine structure -types of loads on CNC machine – guide ways and types – mechanical transmission elements – elements for rotary motion to linear motion – ball screw and types – roller screw and types – rack and pinion – various torque transmission elements – requirements of feed drives and spindle drive.
UNIT III MECHATRONICS ELEMENT IN CNC MEASURING SYSTEM AND TOOLING
Measuring systems – feedback devices – velocity feedback – analog and digital – position feedback – rotary and linear. Tooling – requirement and planning – preset, qualified and semi qualified tools. Fixtures – requirement – unified and modular fixtures – tool identification – touch trigger probe- tool coding – EEPROM tools. 19 Tool condition monitoring – various indirect and direct methods. Identification and gauging of work piece. Tool locking system – ball lock mechanism and contact pressure monitoring. Automatic tool changing system – types and benefits – tool magazine – sensors in CNC.
UNIT IV CNC PROGRAMMING
Machine axes identification – primary, secondary and tertiary – manual CNC programming – Milling programming fundamentals – compensation and offset in milling -fixed cycles in milling – repetitive programming – loops, sub programs and macros. Turning programming fundamentals – compensation and offset in turning – fixed cycles in turning. Computer assisted programming in APT – basic geometry definition – cutter motion definition – postprocessor statements – generation and execution of APT programs.
UNIT V TESTING AND MAINTENANCE OF CNC MACHINES
Verification of technical specification and functional aspects, Verification during idle running & machine tool and the work piece accuracy – Installation of CNC machines – Maintenance of CNC machines – machine elements – hydraulic elements – electrical and electronic elements – maintenance schedules.
TOTAL : 45 PERIODS
COURSE OUTCOMES:
Upon completion of this course, the students will be able to:
CO1: Get the knowledge of the differences of NC, CNC and DNC.
CO2: Analyse architecture of CNC and to identify the mechatronic elements and its functions in
CNC machine reliable performance.
CO3: Realize the functions of instrumentation systems
CO4: Write the part programming in CNC machine.
CO5: Perform the testing and maintenance of various sub systems of CNC
REFERENCES
1. HMT Limited, “Mechatronics”, Tata Mcgraw-Hill Publishing Co Ltd, 2017.
2. Groover, M.P., “Automation, Production System and CIM”, Prentice Hall of India Pvt. Ltd, 2016.
3. Stenerson and Curran, “Computer Numerical Control-Operation and Programming”, PHI Learning Pvt. Ltd., 2008.
4. Jayakumar, V., and Mahendran, B., “Computer Aided Manufacturing”, Lakshmi Publications, 2005.
5. Jonathan Lin, S.C., “Computer Numerical Control (From Programming to Networking)”, Delmar Publishers Inc., 2000.
6. Radhakrishnan, P., “CNC Machine”, New Central Book Agency, 2000.
7. Sehrawatt, M.S., and Narang, J.S., “CNC Machine”, DhanpatRai And Co, 2002.
8. Grahamt.Smith, “Advanced Machining: The Handbook of Cutting Technology”, IFS Publications Ltd., 1989.