NATIONAL INSTITUTE OF TECHNOLOGY AGARTALA MANUFACTURING TECHNOLOGY A BRIEF OVER VIEW

PRESENTED BY :- AKHILESH KUMAR ENROLL NO. :- 14UPE054 SEMESTER:-6TH BRANCH :- PRODUCTION ENGINEERING

CONTENTS :  INTODUCTION  CLASSIFICATION OF MANUFACTURING TECHNOLOGY

 INTRODUCTION :- IN GENERAL MANUFACTURING IS AN ECONOMIC TERM FOR MAKING GOODS AND SERVICE AVAILABLE TO SATISFY THE HUMAN REQUIREMENT. MANUFACTURING INVOLVED SERIES OF RELATED ACTIVITIES AND OPERATIONS SUCH AS 1.PRODUCTION DESIGN & DEVELOPMENT 2.PROCESS PLANNING 3.INVENTORY CONTROL 4.QUALITY ASSURANCE 5.MARKETING

BLOCK DIAGRAM OF MANUFACTURING INPUTS TECHNOLOGICAL TRANSFORMATION OUTPUT

 CLASSIFICATION OF MANUFACTURING TECHNOLOGY BASICALY MANUFACTURING IS DIVIDED INTO FOUR TYPES  CASTING PROCESS  FORMING PROCESS  METAL JOINIG/FABRICATION PROCESS  MATERIAL REMOVAL/MACHINING PROCESS

 CASTING PROCESS CASTING IS THE PROCESS OF PRODUCING METAL PARTS BY POURING MOLTEN METAL INTO THE MOULD CAVITY OF THE REQUIRED SHAPE AND ALLOWING THE METAL TO SOLIDIFY. THE SOLIDIFIED METAL PIECE IS CALLED AS “CASTING”.

 FLOW CHART OF CASTING PROCESS PATTERN MAKING CORE MAKING MOULDING MELTING AND POURING COOLING AND SOLIDIFICATION CLEANING

 TYPES OF CASTING CASTING CONVENTIONAL METHODS UNCONVENTIONAL METHODS 1.GREEN SAND MOULD 1. CO2 MOULDING (STRONG MOULD) 2.DRY SAND MOULD 2. PERMANENT (METAL MOULD) 3. SHELL MOULDING (THINN MOULD) 4. INVESTMENT CASTING (PRECISION) 5. CENTRIFUGAL (WITHOUT CORE) 6. CONTINUOUS CASTING (OPEN)

ADVANTAGES DESIGN FLEXIBILITY REDUCED COSTS DIMENSIONAL ACCURACY VERSATILITY IN PRODUCTION  DISADVANTAGES LOT OF MOLTEN METAL IS WASTED IN RISER & GATING CASTING MAY REQUIRE MACHINING TO REMOVE ROUGH SURFACES

 FORMING PROCESS FORMING PROCESS ARE PARTICULAR MANUFACTURING PROCESS WHICH MAKE USE OF SUITABLE STRESSES TO CAUSE PLASTIC DEFORMATION OF THE MATERIALS TO PRODUCE REQUIRED SHAPES.

 TYPES OF FORMING PROCESS ROLLING SHEET METAL WORKING FORGING EXTRUSION ROTARY SWAGING THREAD ROLLING EXPLOSIVE FORMING ELECTROMAGNETIC FORMING

 ADVANTAGE NO WASTAGE OF THE RAW MATERIAL. BETTER MECHANICAL PROPERTIES OF THE PRODUCT. FASTER PRODUCTION RATE.  DISADVANTAGE HIGHER AMOUNT OF FORCE AND ENERGY IS REQUIRED FOR METAL FORMING PROCESS COMPARED TO OTHER MANUFACTURING METHOD(EXCEPT THE FORMING OPERATIONS).

 FABRICATION /JOINING PROCESS  METAL FABRICATION IS THE BUILDING OF METAL STRUCTURES BY CUTTING, BENDING, AND ASSEMBLING PROCESSES. IT IS A VALUE ADDED PROCESS THAT INVOLVES THE CONSTRUCTION OF MACHINES AND STRUCTURES FROM VARIOUS RAW MATERIALS.  MANUFACTURING PROCESS IN WHICH AN ITEM IS MADE (FABRICATED) FROM RAW OR SEMI-FINISHED MATERIALS INSTEAD OF BEING ASSEMBLED FROM READY-MADE COMPONENTS OR PARTS.

 CLASSIFICATION OF FABRICATION PROCESS FABRICATION IS THE ACT OF TAKING RAW STOCK MATERIAL AND TURNING IT INTO A PART FOR USE IN AN ASSEMBLY PROCESS. THERE ARE MANY DIFFERENT TYPES OF FABRICATION PROCESSES. THE MOST COMMON AREUSE IN AN ASSEMBLY PROCESS CUTTING FOLDING MACHINING SOLDERING SHEARING STAMPING WELDING

 ADVANTAGE :- LOW POSSIBILITY OF HAZ IN THE JOINT. NO NEED FOR FILLER METAL. REDUCE LATENCY. NO TOOL WEAR. LBW IS NOT INFLUENCED BY MAGNETIC FIELDS.  DISADVANTAGE :- JOINTS MUST BE ACCURATELY POSITIONED. MAXIMUM WELD PENETRATION IS LIMITED(19-21MM).

 MATERIAL REMOVAL/MACHINING PROCESS MACHINING IS ANY OF VARIOUS PROCESSES IN WHICH A PIECE OF RAW MATERIAL IS CUT INTO A DESIRED FINAL SHAPE AND SIZE BY A CONTROLLED MATERIAL-REMOVAL PROCESS.

 CLASSIFICATION OF MACHINING PROCESS TURNING DRILLING SHAPING MILLING GRINDING BROACHING SAWING

 Advantages Machining processes allow high precision components to be rapidly produced.  Disadvantages Machining processes are not suitable for removing large amounts of material. There can be a large amount of wastage.