NJIT ME 215 Chapter 1 Notes

Manufactured goods

Consist of consumer goods and producer goods

Current age

is plastic and polymers

Product growth

normally follws the "S" curve, development, growth, maturity and design optimization

Process operation

Property enhancing Surface enhancing Material Removal Casting & molding Coating Surfacetreatment HeatTreating ComposeMaterials Liquid Semi fluid

Production system

refers to total company and manufacturing systems

Manufacturing

making goods

MS - Manufacturing system

formed by integration of manufacturing process

PS - Production System

unifies MS and other areas

SPS - service production system

transportation, banking, finance, savings & loan, insurance, health care, utilities, education, communication, entertainment, sporting events, etc

Production systems include

People-Money-Equipment-Materials-Supplies-Markets-Management-Manufacturing System-All aspects of commerce

Job

is a group of related operations generally done at one station

Categories of operations:

Materials handling and transport Processing Packaging Inspecting and testing Storing.

job shop

machines situated by function and parts circulated in containers between them

linked cell shop

fluently connected manufacturing cells by special information control.

project shop

built on the spot

flow shop

mass production designated shop with specific manufacturing orientation

continuous process

liquid and gasses production systems (oil refineries)

Surface Processes

consist of coating, cleaning, surface treatment

Products result from manufacture

either fabricating or processing

fabricating

the manufacture of a product from pieces such as parts, components, or assemblies

processing

the manufacture of a product by continuous operations

Primary objective:

is to produce a component having a desired geometry, size, and finish

Assembly operations

Mechanical fastening, Soldering & brazing, Welding, Press, shrink, or snap fittings, Adhesive bonding.

Shaping Processes:

Casting (molten metals) or molding (plastic);
Materials removal: turning, drilling, milling, grinding and new techniques;
Particulate processes: pressing and sintering of metal powder and ceramics;
Deformation processes: forging, extrusion, rolling, bending etc.

Manufacturing engineer

Select and coordinate specific processes and equipment;-Supervise and manage their use.

Industrial (Manufacturing) engineer:

Responsible for manufacturing systems layout

Materials engineers

Specify ideal materials
Develop new and better materials

Forming operations

Rolling, Forging, Extrusion, Shear spinning, Tube Spinning, Swaging and kneading, Deep drawing, Wire and tube drawing, Stretching, Straight bending, Contoured flanging

Joining Processes

Mechanical fastening•Soldering and brazing•Welding•Press, shrink, or snap fittings•Adhesive bonding•Assembly processes

Surface Treatments

Finishing operations
Cleaning•
Removing burrs left by machining•
Providing protective/decorative surfaces-Painting-Plating-Buffing-Galvanizing-Anodizing

Other Manufacturing Operations

Testing•Transportation•Automation•Removal of material waste•Packaging•Storage

Material Selection

optimal combination, must meets processing requirements, operational requirements, lower range of price.

material system

mixture or combination of 2 micro or macro-constituents different in chemical composition and insoluble in each other.