CHAPTER 1 Introduction to manufacturing Process and Properties of Metal -Vishal Sir

What is manufacturing Process? Raw Materials Manufacturing Process Useful Job

Metal shaping process:  Casting process

Metal shaping process:  Embossing

Metal shaping process:  Rolling

Metal shaping process:  Bending

Metal shaping process:  Forging

Metal shaping process:  Spinning

Metal shaping process:  Drawing

Metal shaping process:  Shot peening

Metal shaping process:  Extrusion

Metal shaping process:  Coining

Metal shaping process:  Forming

Metal Joining Process:  Welding

Metal Joining Process:  Brazing

Metal Joining Process:  Soldering

Metal Joining Process:  Riveting

Difference between Soldering, Welding and Brazing  Welding is done between two same metals.  Whereas brazing is used to joint different metals at very high temperature.  Soldering is same as brazing, except it takes place at comparatively low temperature.  Welding: Welding rods  Brazing: Filler metal rod  Soldering: Tin alloys

Metal Cutting Process:  Turning

Metal Cutting Process:  Planing

Metal Cutting Process:  Grinding

Metal Cutting Process:  Shaping

Metal Cutting Process:  Hobbing

Metal Cutting Process:  Drilling

Metal Cutting Process:  Threading

Metal Cutting Process:  The boring tool is a single-point cutting tool, which can be set to cut the desired diameter by using an adjustable boring head. Boring operation Boring

Metal Cutting Process:  Slotting  A milling operation that cuts a narrow part into the surface of a workpiece

Metal Cutting Process:  Reaming

Metal Cutting Process:  Gear Cutting

Metal Cutting Process:  Broaching

Metal Cutting Process:  Shaving

Metal Finishing Process  Lapping

Metal Finishing Process  Electroplating

Metal Finishing Process  Honning

Metal Finishing Process  Metal Spraying

Metal Finishing Process  Polishing

Metal Finishing Process  Anodysing

Metal Finishing Process  Buffing

Metal Finishing Process  Parkerizing

Properties of metal Mechanical & Physical Chemical Electrical

Residual Stresses  Residual stresses are stresses that remain in a solid material after the original cause of the stresses has been removed.  Residual stresses may be advantageous or disadvantageous.

Residual Stresses  Advantages: Corrosion resistance & better fatigue behavior  Disadvantages: Less Accuracy Crack and twist occurs Change stress limit

How to remove residual stress? Solution: By heating the metal below RECRYSTALIZATION TEMPERATURE.

Recrystalization  Recrystallization is a process by which deformed grains are replaced by a new set of undeformed grains and grow until the original grains have been entirely consumed

Recrystallization Effect Hot Working of metal Recrystallization temperature Melting Point COLD WORKING OF METAL Normal temperature Temperature Rise

Grain Growth