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63. CNC MACHINES AND AUTOMATION, LTP, 4-4, , RATIONALE, , Diploma holders are required to supervise and handle specialized machines and equipment like, CNC machines. For this purpose, knowledge and skills about NC machines, part programming, in NC machines and tooling for CNC machines are required to be imparted for enabling them to, perform above functions. This subject aims at development of knowledge and skills about CNC, machines, tools, equipment and use of high tech machines for increased productivity and quality., , LEARNING OUTCOMES, , After undergoing this course, the students will be able to :, , explain the construction and tooling of CNC machine., prepare simple part programme for different operations., operate a CNC lathe., , operate a CNC milling machine., , diagnose common problems in CNC machines., , explain the trends in the field of automation., , DETAILED CONTENTS, , Introduction (06 Periods), , Introduction to NC, CNC & DNC, their advantages, disadvantages and applications,, Machine Control Unit, input devices, serial communication and Ethernet techniques,, selection of components to be machined on CNC machines, Problems with conventional, NC, New developments in NC, Axis identification, PLC Control and its components., , Constructional details and Tooling (08 Periods), Design features, specification Chart of CNC machines, use of slideways, balls, rollers and, coatings, motor and leadscrew, swarf removal, safety and guarding devices, various, , cutting tools for CNC machines, overview of tool holder, different pallet systems and, automatic tool changer system, management of a tool room., , Part Programming (12 Periods), , Part programming and basic concepts of part programming, NC words, part programming, formats, simple programming for rational components, part programming using canned, , CORRECTED AND APPROVED BY BOARD OF TECHNICAL EDUCATION.U.P,LUCKNOW IN MEETING HELD ON, 10.07.2019 @RASHMI SONKAR, , Page 177

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cycles, subroutines and do loops, tool off sets, cutter radius compensation and wear, compensation, , System Devices (08 Periods), , Actuators, Transducers and Sensors, Tachometer, LVYDT, opto-interrupters,, potentiometers for linear and angular position, encoder and decoder, axis drives, open, loop system, close loop system., , Problems in CNC Machines (06 Periods), , Common problems in mechanical, electrical, pneumatic, electronic and PC components, of NC machines, diagnostic study of common problems and remedies, use of on-time, fault finding diagnosis tools in CNC machines., , Automation and NC system (06 Periods), , Role of computer in automation, emerging trends in automation, automatic assembly,, manufacture of magnetic tape, manufacture of printed circuit boards, manufacture of, integrated Circuits, Overview of FMS, Group technology, CAD/CAM and CIM., , CNC operations involved in Turning and Milling (10 Periods), , 7.1 Introduction to operations involved in turning machines- Facing OD and ID Rough, cut, Finish cut, Taper turning, Drilling, Threading, Grooving and cut-off (parting), , 7.2 Introduction to operations involved in Milling-contouring, pocketing, Dmilling,, Facing, Circular tools paths., , 7.3 Different terms like clearance, Retract, Feed plane, Depth of cut, lead in, lead out,, overlap, , 7.4 Simple programmes in Milling and Turning involving different operations., , LIST OF PRACTICALS, , Study the constructional details of CNC lathe., Study the constructional details of CNC milling machine., , Study the constructional details and working of:, , Automatic tool changer and tool setter, , - Multiple pallets, , - Swarf removal, , - Safety devices, , Develop a part programme for following lathe operations and make the job on CNC lathe, and CNC turning center., , CORRECTED AND APPROVED BY BOARD OF TECHNICAL EDUCATION,U.P,LUCKNOW IN MEETING HELD ON, 10.07.2019 @RASHMI SONKAR,, , Page 178

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wn, , 6., 7., 8, , 9., , 10., , - Plain turning and facing operations, - Taper tuming operations, - Operation along contour using circular interpolation., Develop a part programme for the following milling operations and make the job on, CNC milling, - Plain milling, - Slot milling, - Contouring, - Pocket milling, Preparation of work instruction for machine operator, Preparation of preventive maintenance schedule for CNC machine., Demonstration through industrial visit for awareness of actual working of FMS in, production, Use of software for turning operations on CNC turning center., Use of software for milling operations on machine centres., , INSTRUCTIONAL STRATEGY, , This is highly practice-based course. Efforts should be made to develop programming skills, amongst the students. During practice work, it should be ensured that students get opportunity to, individually perform practical tasks., , RECOMMENDED BOOKS, , is), , CNC Machines — Programming and Applications by M Adithan and BS Pabla; New Age, Intemational (P) Ltd., Delhi., , Computer Aided Manufacturing by Rao, Kundra and Tiwari; Tata McGraw Hill, New, Delhi., , CNC Machine by Bharaj; Satya Publications, New Delhi., , e-books/e-tools/relevant sofiware to be used as recommended by AICTE/UBTE,.NITTTR,, Chandigarh., , Website for Reference:, , hitp//swayam.gov.in, , CORRECTED AND APPROVED BY BOARD OF TECHNICAL EDUCATION,U.P,LUCKNOW IN MEETING HELD ON, , 10.07.2019 @RASHMISONKAR, , Page 179