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Revision as of 14:23, 29 January 2014

1 Executive Summary
2 Primary Stakeholders and Product Needs
3 Product Function and Use
- 3.1 User Study
- 3.2 Mechanical Function
4 List of Parts
- 4.1 Bill of Materials
5 Design For Manufacturing and Assembly (DFMA)
6 Failure Modes and Effects Analysis (FMEA)
7 Design for Environment (DFE)
8 Team Members
9 References

Executive Summary

Primary Stakeholders and Product Needs

Product Function and Use

User Study

Mechanical Function

List of Parts

The following details the list of parts of a hands-free coffee grinder.

Coffee Grinder Exploded View

Bill of Materials

Part Number	Name	Quantity	Mass (g)	Function	Material	Manufacturing Process/ Purchased Component	Image
1	Lid	1	66	Contains coffee	Plastic	Blow Molded
2	Lock nuts	2	6	Crank Assembly	Retainment/Assembly	Steel	Catalog Purchase
3	Nut w/ integrated lock washer	2	16	Crank Assembly	Retainment/Assembly	Steel	Catalog Purchase
4	Toe strap holders	2	6	Pedals	Ability to secure toe	Plastic	Injection Molding
5	Flange nut	4	<1	Pedals	Attach toe strap holder to foot grip	Steel	Catalog Purchase
6	Screw w/ integrated washer	4	<1	Pedals	Attach toe strap holder to foot grip	Steel	Catalog Purchase
7	Screw	8	<1	Pedals	Attach foot grip to pedal	Steel	Catalog Purchase
8	Pedal cap	2	<1	Pedals	Keep dirt out of pedals	Plastic	Injection Molding
9	Foot grip	2	27	Pedals	Prevent foot from slipping off pedal	Aluminum	Die Casting
10	Outer jam nut	2	9	Sprocket Assembly	Retainment/Assembly	Steel	Catalog Purchase
11	Washer	2	<1	Sprocket Assembly	Retainment/Assembly	Steel	Catalog Purchase
12	Inner jam nut	2	7	Sprocket Assembly	Retainment/Assembly	Steel	Catalog Purchase
13	Pedal	2	54	Pedals	Central Component in Pedals	Aluminum	Die Casting
14	Tamper Proof Screw	1	<1	Connects cord housing assembly to main body	Steel	Purchased Part
15	Rubber Foot Pad	3	<1	Prevents Device from Slipping	Rubber	Stamped
16	Cord Reel Container	1	17	Contains Cord While Wound	Plastic	Blow Formed
17	Screw	3	<1	Mates Part 19 to Part 28	Steel	Purchased Part	100px\|center
18	Power Cord Reel Center	1	3	Cord Capstan	Plastic	Injection Molded	100px\|center
19	Chain	1	304	Drivetrain	Drive rear sprocket using rotation of front sprocket	Steel	Stamping and Pressing
20	Crank	1	260	Spindle/Crank Assembly	Lever arm for force from foot	Steel, aluminum	Die Casting
21	Crank w/ sprocket	1	626	Spindle/Crank Assembly	Transfers force to chain	Steel	Assembly - Stamping and Die Casting
22	Rear sprocket	1	82	Rear Hub Assembly	Sees force from chain and sends it to the tire	Steel	Stamping with Post Machining
23	Bearing	2	19	Rear Hub Assembly	Reduces system friction	Steel, Aluminum	Catalog Purchase
24	Rear wheel	1	?	Rear Hub Assembly	Interface between rear sprocket and ground	Steel, Rubber, Aluminum	Assembly - Catalog Components Mated with a CNC lathed hub
25	Rear axle	1	101	Rear Hub Assembly	Allows wheel to move	Steel	CNC Lathing
26	Sprocket retaining ring	1	15	Rear Hub Assembly	Holds sprocket components together	Steel	Catalog Purchase
27	Mechanical Switch	1	1	Actuates the Safety Switch	Plastic	Injection Molded
28	Motor Housing	1	47	Secures motor to device	Plastic	Injection Molded
AC Motor Sub-Assembly
29	Brushes	2	<1	Provides Current to Commutator	Carbon	Electronic Component
30	Motor Shaft Cap	1	<1	Transmits Torque from Part 42 to Part ??	Plastic	Injection Molded
31	Shaft Insulator	1	<1	Provides Mechanical and Electrical Insulation to the Shaft	Fiber	Stamped
32	Spring Washer	1	<1	Provides Axial Preload to locate the commutator with respect to the bushings	Copper	Purchased
33	Small Brown Washers	4	<1	Locates Part 42 Axially	Plastic	Stamped
34	Large Orange Washers	2	<1	Locates Part 42 Axially	Plastic	Stamped
35	Small Metal Washers	2	<1	Locates Part 42 Axially	Steel	Purchased
36	Bearing	2	2	Locates Part 42 Radially	Steel	Purchased
37	Brush Side Bracket	1	17	Locate Part 36 on Brush Side	Steel	Stamped and Bent
38	Non-Brush Side Bracket	1	16	Locate Part 36 on Non Brush Side	Steel	Stamped and Bent
39	Brush Housing	2	1	Constrains Part 29	Plastic	Injection Molded
40	Stator Coil	2	13	Provides Magnetic Poles	n/a	Electronic Component
41	Steel Inductor Plate	30	4	Enhances Magnetic Poles	Steel	Stamped
42	Rotor	1	77	Provides Motor Torque	n/a	Electrical Component
43	Circuit Board	1	28		Assembly	Electrical Component
56	Male Drive Adapter	1	15		Plastic	Injection Molded
Knob Sub-Assembly
44	Power Button	1	2	Allows user to operate grinder	Plastic	Injection Molded
45	Power Button Finger	1	<1	Translate power button movement to connect circuit	Plastic	Injection Molded
46	Knob	1	8	Allows user to adjust fineness of grind	Plastic	Injection Molded
47	Circuit Board Connector	1	<1	Connects fineness knob circuit	Copper	Stamped
48	Power Button Spring	1	<1	Returns power button after press	Steel	Purchased
49	Knob Screws	4	<1	Fastens knob sub-assembly	Steel	Purchased
50	Detent Springs	2	<1	Pushes ball bearings for discrete adjustment of knob	Steel	Purchase
51	Detent Bearings	2	<1	Allows for discrete adjustment of knob	Steel	Purchased
52	Detent Housing	1	2	Contains detent components in knob	Plastic	Injection Molded
53	Brush	1	3	Cleans coffee grinds	Plastic	Injection Molded
54	Body	1	74	Houses inner components	Plastic	Injection Molded
55	Power Cord	1		Supplies electrical current from outlet to grinder	Assembly	Purchased

Design For Manufacturing and Assembly (DFMA)

Failure Modes and Effects Analysis (FMEA)

Design for Environment (DFE)

Team Members

Phil Aufdencamp

Justin Barsano

Kristen Hauser - General Organization

Brian Tang

References

Dieter, George E., and Linda C. Schmidt. Engineering Design. 4th Edition. New York, NY: McGraw-Hill, 2009. Print.

@@ Line 53: / Line 53: @@
 | 13 || Pedal || 2 || 54 || Pedals || Central Component in Pedals || Aluminum || Die Casting || [[Image:13_Pedal.jpg|100px|center]]
 |-
-| 14 || Ball bearings || 24 || <1 || Pedals || Friction Prevention || Steel || Catalog Purchase || [[Image:14_BallBearings.jpg|100px|center]]
+| 14 || Tamper Proof Screw || 1 || <1 || Connects cord housing assembly to main body || Steel || Purchased Part || [[Image:Team6_Part_14.jpg|100px|center]]
 |-
-| 15 || Nut || 2 || 3 || Pedals || Retainment/Assembly || Steel || Catalog Purchase || [[Image:15_Nut.jpg|100px|center]]
+| 15 || Rubber Foot Pad || 3 || <1 || Prevents Device from Slipping || Rubber || Stamped || [[Image:Team6_Part_15.jpg|100px|center]]
 |-
-| 16 || Double D Washer || 2 || <1 || Pedals || Catalog Purchase || Steel || Catalog Purchase || [[Image:16_DoubleDWasher.jpg|100px|center]]
+| 16 || Cord Reel Container || 1 || 17 || Contains Cord While Wound || Plastic || Blow Formed || [[Image:Team6_Part_16.jpg|100px|center]]
 |-
-| 17 || Nut w/ seat for ball bearings || 2 || 5 || Pedals || Retainment/Assembly || Steel || Catalog Purchase || [[Image:17_NutSeat.jpg|100px|center]]
+| 17 || Screw || 3 || <1 || Mates Part 19 to Part 28 || Steel || Purchased Part || [[Team6_Part_17.jpg|100px|center]]
 |-
-| 18 || O-ring || 2 || <1 || Pedals || Keeping lubricants inside pedal || Rubber || Catalog Purchase || [[Image:18_Oring.jpg|100px|center]]
+| 18 || Power Cord Reel Center || 1 || 3 || Cord Capstan || Plastic || Injection Molded || [[Team6_Part_18.jpg|100px|center]]
 |-
 | 19 || Chain || 1 || 304 || Drivetrain || Drive rear sprocket using rotation of front sprocket|| Steel || Stamping and Pressing || [[Image:19_Chain.jpg|100px|center]]

Coffee grinder