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Revision as of 03:52, 1 February 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
Grinding Chamber Sub-Assembly
1	Lid	1	66	Contains coffee	Plastic	Blow Molded
2	Flat Head Screws	3	<1	Cup to Scatter Shield	Steel	Catalog Purchase
3	Female Drive Adapter	1	6	Provides Torque to Blade Assy	Plastic	Injection Molding
4	Rubber Nipples	3	<1	Vibration Isolation & Noise Reduction	Rubber	Die Cut
5	Plastic Washer	1	<1	Reduces friction of Blade Assy	Plastic	Catalog Purchase
6	Cup	1	46	Provides References for Coffee Bean Measuring	Plastic	Injection Molding
7	Scatter Guard	1	15	Contains Coffee Beans behind the Blade	Tin	Stamped
8	Dust Shield	1	3	Separates the Grinding Chamber and the Drive Assy	Plastic	Injection Molding
9	Blade-Adapter Shaft	1	2	Transmits Torque from Part 3 to Part 13	Plastic	Catalog Purchase
10	Blade Gasket	1	<1	Seals Blade Assy	Rubber	Injection Molding
11	Blade Washer	1	<1	Reduces friction of Blade Assy and Provides Axial Preload	Steel	Catalog Purchase
Blade Sub-Assembly
12	Blade Hub	1	2	Connects blade to drive shaft	Plastic	Injection Molding
13	Blade	1	3	Grinds Coffee	Stainless Steel	Stamped
Cord Housing Sub-Assembly
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
18	Power Cord Reel Center	1	3	Cord Capstan	Plastic	Injection Molded
19	Power Cord Reel	1	26	Captures Cord	Plastic	Injection Molded
20	Internal Motor Gasket	2	3	Seals Motor Components	Rubber	Injection Molding
21	Screw For Part 22	2	1	Mates Part 22 to Part 28	Steel	Purchased Part
22	Power Cord Retention Clip	1	2	Positively Retains The Power Cord Inside The Housing	Plastic	Injection Molding
23	Tiny Spring	1	<1	Provides Preload to the Safety Mechanism	Steel	Purchased Part
24	Safety Paper	1	<1	Reduces Abrasion of Safety Switch	Plastic	Stamped
25	Electrical Switch Cover	1	1	Houses Electric Switch	Plastic	Injection Molded
26	Electrical Switch Lead	2	1	Provides Current to Electrical Switch	Copper	Purchased Part
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 - DFE

Justin Barsano - DFMA

Kristen Hauser - User Study, General Organization

Brian Tang - FMEA

References

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

Coffee grinder