MCHE 3920 Week 2: Intro and Product Disassembly Studies

MCHE 3920 Week 2: Intro and Product Disassembly Studies

OEMs- manufacturing specialists and designers had similar goals

Until about 1980, most designers worked for or closely w/ _________

outsourced

today, most manufacturing is ______

incentive

Outsourcing means the designer must be knowledgeable ab manufacturing processes bc outsourcers are typically only experts in their particular method and have no ________ to inform the designer of his or her diff options

function, quality, cost

Design process is iterative and involves continutal tradeoffs between ______, _______, and ______

-materials, shape size; production volume; look and feel

FUNCTION: can it be done?

tolerances, defects, properties, reproducibility

QUALITY:

part price, investment, time to market, ecological costs

COST:

optimization

Design is an ________ process

weighted

F, Q, C attributes may be ________ differently

principle, methods, equipment

Classify methods under a hierarchy of:

manufacturing principle

i.e.; metals casting

manufacturing method

i.e.; sand casting, LP Die casting, HP die casting…

manufacturing equipment

i.e.; sand casting machine

Belgium, 2009, 4000

bus shelter facts: manufactured in ________, introduced in ________, more than________ installed

modular

Bus shelter design reqs: ________ design to allow a variety of sizes, shapes, and colors w same basic comps

20

Bus shelter: designed to last ________ years

729, 168, 575

Bus shelter: total parts________, ________ product-specific parts manufactured for bus shelter only, ________ fasteners

bought-in OR off-the-shelf

parts that aren’t product-specific

cast

For more complex geometries:

extruded

For medium complexity:

sheet metal

for simple geometries:

sand casting

all castings ALUMINUM using ________ method

complex geometries

sand casting: good choice for ________ and production volumes involved for aluminum

integration

Extrusions are PRODUCT-SPECIFIC: allows for ________ of assembly features into extruded profile

blanking, universal

Sheet metal: made of low carbon steel- ________ is first cut to size. Four edges bent into shape. can be done w ________ equipment

18, 50000

Fume extraction hood: development took ________ months, target production is ________ units/year for 5 years

wall-mounted, low, vent to outside

extraction hood requires: easy ________ installation, ________ weight, no ________,

124, 22, 59

extraction hood: total parts ________, ________ product-specific made by injection molding, ________ fasteners

form freedom, optimized strength and color choice

injection molding offers: