Flashcards
Product Design Exam 3
Cards in this deck (61)
- 1What constraints dominate at the manufacturing stage?Technological
market
physical - 2Methods for reducing component costsRight process.
Eliminate process steps.
Choose correct tolerances.
Standardize components. - 3Forging Requireshigh stresses and often high temperatures
- 4Rule of thumb tolerance+/- .001in
- 5Cardinal Rules for DFAReduce number of discrete parts as much as possible
Make the remaining parts as easy to assemble as possible. - 6BD chart Box 1Does this part move relative to all other analyzed parts?
- 7BD chart Box 2Is this movement essential for the product to function?
- 8BD chart Box 3Must the part be separate to provide the required movement?
- 9BD chart Box 4Is this part a different material to ALL Parts already analyzed?
- 10BD chart Box 5Is A different material essential for the product to function?
- 11BD chart Box 6Must the part be separate to satisfy the different material requirement?
- 12BD chart Box 7Is this part separate to allow for service replacement?
- 13BD chart Box 8Is replacement essential?
- 14BD chart Box 9Must the part be separate to enable replacement?
- 15Alpha SymmetrySymmetry about an axis orthogonal to the axis of insertion.
- 16Beta SymmeterySymmetry about the axis of insertion
- 17The higher the sum of alpha and beta the_______.Fewer feasible orientations the part can have, and the more difficult the assembly is.
- 18Thing of symmetery as a different view every ___ degreees-
- 192 Fundamental TasksHandling
Inserting/seruring - 20Relative cost of fastners low to highsnap fits
plastic bends
rivets
threaded fasterners - 21Pyramid AssmeblyAssemble about one axis, preferably from above
- 22DFA must be viewed from perspective offirm and assembler
- 23design for Location for release-
- 24MachiningTypically low volume, high precision, used to finish
- 25Metal forming (volume)Largest production process by volume
- 26Categories of FabricationSubtractive, additive, joining, forming, finishing
- 27Dies MoldsDies-metals
molds-nonmetals - 28Casting processes requireHeat
- 29Cold forging and sheet forming requiresPressure
- 30Injection molding, hot forging and die casting requireheat and pressure
- 31billet forming includesforging and cold forming
- 32Characteristics of forged partshigh strength
simple shapes,
low tolerances - 33Progressive dies are best forhigh volume sheet metal forming of complex parts
- 34If hole size is critical, process is calledpiercing
- 35—fine blanking
- 36Fine blanking differs from blanking in thatthe blank is not fractured as its removed
- 37Fine blanking descriptionSheet is trapped between two punches, and slowly cut from the sheet
- 38—deep drawing
- 39Forming effect on strengthForming inherently strengthens metals because of the disruption of the crystal lattice
- 40What forming processes are used for high strength?Billet and sheet froming
- 41When very high strength is needed parts areforged or cold formed
- 42sheet forming often results innet shape parts
- 43Plasticspolymers plus additives
- 44Consumer ThermoplasticsPET, HDPE, PVC, LDPE, PP, PS
- 45Weld lines are caused bymetal flowing together as it cools
- 46which is better arrangement for thin and thickthick to thin
- 47Billet forming has worst ____ and ____.tolerances and surface finishes
- 48If you need strength and complexitydie casting
- 49Mudawaste
- 50The worst wasteOverproductoin
- 51WastesOverproduction,
transportation, inventory, waiting, processing, rework, motion, intellect - 52KaizenContinuous improvement
- 53Five S'sSorting, sifting, strict, spic and span, sweeping
- 54Elements of lean productionquality assurance, awarness, level production, JIT
- 55takt timetotal available production time/total production requirements
- 56heijunkalevel production
- 57hanseiself reflection
- 58AndonSignboard
- 59KanbanCard
- 60Murauneveness
- 61Jidokaautomation
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- Flashcards on Product Design Exam 3, created by ron on 29/11/2013.
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- ron
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