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Introduction to CAM ppt VK Modi.pdf
- 1. Introduction to CAM and CNC Manufacturing BY VINIT.K.MODI M.E.(MECH) LME BBIT .V.VNAGAR V.K.MODI BBIT 2023
- 2. Computer Aided Manufacturing Computer aided Manufacturing is defined as the effective use of computer technology in the planning, management and control of manufacturing functions. V.K.MODI BBIT 2023
- 3. Computer Aided Manufacturing (CAM) is the use of computers to assist the manufacturing process. CAD and CAM are combined CAD/CAM so that the output of the CAD module is fed to the CAM system. The design can be converted into a sequence of processes (drilling, turning, milling etc) for manufacture on a Numerically Controlled (NC) machine Computer Aided Manufacturing V.K.MODI BBIT 2023
- 4. VARIETY LOW MEDIUM HIGH VOLUME MEDIUM HIGH LOW STAND ALONE CNC MANU. CELL FLEXIBLE MANUFACTURING SYSTEM (FMS) DEDICATED SYSTEM TRANSFER LINE Manufacturing methods Based on production quantity V.K.MODI BBIT 2023
- 5. CNC MACHINE TOOL INTEGRATION Integration and Automation for Computer Numerical Control A U T O M A T I O N CNC MACHINING CENTER CLUSTER OF NC/CNC MACHINES CAM SYSTEM ONE OR MORE COMPUTER REQIRED V.K.MODI BBIT 2023
- 6. The application of CAM The application of CAM can be divided into two categories 1 Manufacturing Planning 2 Manufacturing control The two categories represent two different levels of involvement of computer in the operation of the plant Manufacturing planning:- CAM application for manufacturing planning are those in which the computer is used indirectly to support the production function, but there is no direct connections between the computer and process. The computer is used as off line to provide information for effective planning and management of production activities V.K.MODI BBIT 2023
- 7. Important application •Cost estimating • Computer aided process planning(CAPP) •Computerized machinability data system •Computer assisted NC or CNC part programming •Development of work standards •Computer aided line balancing •Production and inventory planning. V.K.MODI BBIT 2023
- 8. Manufacturing Control 1. The second category of CAM application is concerned with developing computer System for implementing the manufacturing control function Manufacturing control is concerned with managing and controlling the physical operations in the factory. Process control, Quality control, shop floor control and process monitoring are all included in the scope of this function The application of the computer process are pervasive today in automated production systems. They include transfer lines, assembly systems, numerical Control robotics, material handling and flexible manufacturing system V.K.MODI BBIT 2023
- 9. ELEMENTS OF THE CAM SYSTEM THE CAM DATA BASE •PRODUCTION MANAGEMENT •MANUFACTURING CONTROL V.K.MODI BBIT 2023
- 10. CENTRAL COMPUTER LARGE SCALE COMPUTER CAD CNC Part Programing SMALL COMPUTER CNC manufacturing QC Cam data base Engineering .Data base NC production data base Mps Control data base Qc dATA base. CAM DATA BASE FOR COMPUTER MANU.SYSTEM V.K.MODI BBIT 2023
- 11. DESIGN ENGG. PRODUCTION ENGG. NC COMPUTER PART PROGRAM Post Processor Manufacturing Specification Design Data Machinabilty Data Production Data CAM DATA BASE Engineenring information flow to and from the data base V.K.MODI BBIT 2023
- 12. CAM DATA BASE Nc Production Data Master Production Schedule Scheduling Program Additional Manufacturing Information To Shop floor Status Feed back READY BANK PRODUCTION MANAGEMENT INFORMATION FLOW PRIORITIES V.K.MODI BBIT 2023
- 13. CAM DATA BASE Monitoring And Control Data Manufacturing Control Program STATUS FEED BACK Scheduling Data READY BANK Add. Manu. Information NC MACHINE TOOL Scheduling PROCESS FEED BACK NC INST. Manufacturing Control information flow V.K.MODI BBIT 2023
- 14. CAM DATA BASE Quality Control Specification Management Report Quality Control Program Measured Part Tolerance Status Feedback Quality control operation In CAM V.K.MODI BBIT 2023
- 15. CNC Machine The Electronic Industries Association defines CNC as The Numerical Control System where in a dedicated stored – program computer is used to perform some or all of the basis NC functions in accordance with control programs stored in the Read-write memory of the computer V.K.MODI BBIT 2023
- 16. CNC Controller Actuating Devices ( Spindle motor, Servo motor,and Controllers Machine Tool Feed back Transducer ( Resolver and Encoder, or Linear scale CNC Program Block diagram of a CNC system V.K.MODI BBIT 2023
- 17. MINI COMPUTER AND STORAGE HARDWARE CIRCUITRY SERVO SYSTEM CNC MACHINE TOOL Input CNC instruction CNC CONTROLLER Software Function Hardware Function Cnc system schematic V.K.MODI BBIT 2023
- 18. Types of CNC system TOOL PATH STARTING POINT Point to point (positioning) CNC system (0,0) V.K.MODI BBIT 2023
- 22. Continuous path simulation V.K.MODI BBIT 2023
- 26. Translator COMMAND SIGNAL FORM MCU Stepper motor BALL SCREW MACHINE TOOL SLIDE Open loop control system Other classification of CNC system V.K.MODI BBIT 2023
- 27. MACHINE SLIDE NC TRANSDUCER FEED BACK DEVICE COMMAND SIGNALS FROM MCU AMPLIFIER COMPARATOR (ERROR DETECTOR) CORRECTION SIGNAL (100-99) SERVO MOTOR Close loop CNC control V.K.MODI BBIT 2023
- 28. Basic Components Of CNC Contorl System (Manufacturing) Part Program Machine Control Unit (MCU) Machine tool V.K.MODI BBIT 2023
- 29. CNC Part Programming Types of Part Programming Manual part programming(g code and m code programming) Computer assisted part programming Using various higher level language like APT compact EXAPT etc Auto part programming with software like MasterCAM, SmartCAM ,Inventor CAM etc V.K.MODI BBIT 2023
- 30. Various format of part program Word address format Tab sequential format Fixed sequential format Word address format N---G—X—Y—Z—I—J---K—F—S—T---M--EOB V.K.MODI BBIT 2023
- 31. N –Sequence or block number G– Preparatory function Xyz – Dimension word Ijk ---Dimension word for arc and circle F– Feed rate S– spindle speed T—tool function M– miscellaneous function Various function for G and M code programming Different NC words V.K.MODI BBIT 2023
- 32. Machine Control Unit Various input media for MCU Part program tape Magnetic disk Floppy disk Main frame computer disk drive M C U key board MDIS(Manual Data Input System) V.K.MODI BBIT 2023
- 33. Organization of a typical MCU FEED RATE(F) CONTROL AREA INTERPO LATOR SERVO AREA Tape reader Auxiliary Functions M,S,Tarea To m/c tool control Panel DATA DECODING CONTROL AREA BUFFER To m/c tool V.K.MODI BBIT 2023
- 34. Features of CNC machine tools Bed construction Use of ball screw instead of lead screw Automatic pressurized lubrication system Sliding materials(PTFE) Drives (Speed and Feed Drives) Tool turret & ATC Close loop control Automatic palate Changer V.K.MODI BBIT 2023
- 35. Direct Numerical Control The electronic industries association has define DNC as A system connecting a set of numerically controlled machines to a common memory for part program or machine program storage with Provision for on demand distribution of data to Machine The important difference between DNC and CNC Is the elimination of dedicated computer by A Large computer that manages many machines V.K.MODI BBIT 2023
- 36. DNC through link computer CNC M/C CITY-1 CNC M/C CITY-2 CNC M/C CITY-3 DNC COMPUTER AT LOCATION 4 Link computer in Satellite V.K.MODI BBIT 2023