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NCS - IE 316 - Class Notes - Week 1

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NCS - IE 316 - Class Notes - Week 1

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background image ISE316 Contents 1)Manufacturing Engineering...........................................................................22)Materials and Processes................................................................................33)Classification of Manufacturing Processes....................................................84)Engineering Specifications..........................................................................10
background image ISE316 1)           Manufacturing Engineering Why important? - Historically - Economically - Technologically Traditional Product Development : Over the Wall Approach  - Serial process: very time consuming and costly - Not what customer wants New Mantra : Integrated or Concurrent Engineering - Parallel process - Incorporate voices of all stakeholders = successful product development - 80% of product cost is decided in design phase - Product Attributes of Cost & Quality Involve design & manufacturing (Big M) Manufacturing = manus (hand) + factus (make) Technological def = processing to make products 
Economical def = have value added
- Once a product has been designed, the materials and processes determine the cost of that 
product to a large extent
- Material & manufacturing process selection generally go hand in hand
background image ISE316 2)           Materials and Processes How are materials chosen? Voice of Customer requirements Mechanical properties, aesthetic charac., manufacturing process capability Four types of Engineering Materials - Different constitute chemistries - Different mechanical, physical, electrical, thermal
properties
- Different material behavior when subjected to forces, T,
other parameters of the processes determine success of
the manufacturing operation
(1) Ceramics Description Inorganic, nonmetallic solids Crystalline, partly crystalline or amorphous Typically compounds formed between metals and non­metals Characteristics – very hard, rigid, and brittle (limited tensile strength); + T and wear 
resistance
Application
High T app that do not involve impact, vibration, or other substantial 
loading
Widely used as thin­film coatings for wear and T resistance 
Ex. tungsten carbides, alumimna, boron nitride
(2) Metals Description Elements & alloys with  crystalline properties  – crystal structure is  responsible for the mechanical properties of all metals (true for ceramics 
and some polymers as well)
Type, orientation and boundaries between crystals govern how plastic 
deformation occurs
Characteristics – Malleability, ductility, electrical thermal conductivity and opacity
Classification
BCC – Fe, Cr, Mo, Ta, W
background image ISE316 FCC – Al, Cu, Au, Pb, Ni HCP – Mg, Ti, Zn Ferrous  Based on Fe Account for ~85% of metal used in US Steels  = alloys of iron containing C, which prevents sliding dislocations in  Fe crystal lattice, results in + hardness Plain Carbon Steels  = C is the main alloying element Low C Steel 
(<0.2% C)
Easy to form Widely used for sheet
metal (automotive)
Medium C Steel
(>0.2­0.5% C)
Better strength than 
low C steel
Formed slightly more 
difficultly
Engine parts, 
connecting rods, 
crankshafts
High C Steel 
(>0.5%C)
High strength and 
stiffness
Knifes, springs Stainless Steels  = Highly alloyed steel (>15% Cr and <1.2% C) Corrosion resistance + ductile than carbon steels (more difficult to work
with in certain applications)
+ expensive than carbon steels 2XX (Austenitic)
3XX (Austenitic)
Non­
magnetic
304 Standard Stainless 
(Food, sterilization)
316 (L/F/N) High 
Corrosion Environment 
with added Ni and Mo 
4XX
(Ferritic & Martensitic)
Magnetic Tool Steels  = special alloyed and heat­treated steels for cutting  tools, dies, and molds

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School: North Carolina State University
Department: Industrial Engineering
Course: Manufacturing Engineering I - Processes
Professor: Carter Keough
Term: Spring 2018
Tags: manufacturing, material, and Engineering
Name: ISE316 Week#1
Description: 1) Introduction to Manufacturing Processes 2) Introduction Engineering Material Properties 3) Manufacturing Processes 4) Engineering Specifications I
Uploaded: 01/15/2018
13 Pages 38 Views 30 Unlocks
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