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Revision as of 21:13, 21 September 2008 (view source) Bhenders (Talk | contribs) ← Older edit		Revision as of 21:22, 21 September 2008 (view source) Bhenders (Talk | contribs) (→Design for Environment) Newer edit →
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	=Failure Modes and Effects Analysis=		=Failure Modes and Effects Analysis=
-	=Design for Environment=	+	=Design for Environment (DFE)=
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		+
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		+	Sector
		+	GWP
		+	MTCO2E  CO2
		+	MTCO2E  CH4
		+	MTCO2E  N2O
		+	MTCO2E  CFCs
		+	MTCO2E
		+	Total for all sectors 646. 555. 57.4 20.6 12.8
		+	221100 Power generation and supply 205. 203. 0 0 2.47
		+	484000 Truck transportation 49.0 48.3 0.075 0.674 0
		+	3221A0 Paper and paperboard mills 48.7 48.7 0 0 0
		+	339930 Doll, toy, and game manufacturing 35.3 35.3 0 0 0
		+	325211 Plastics material and resin manufacturing 29.4 29.4 0 0 0
		+	562000 Waste management and remediation services 23.6 3.73 19.9 0.029 0
		+	211000 Oil and gas extraction 20.7 3.47 17.2 0 0
		+	325190 Other basic organic chemical manufacturing 18.1 12.4 0 5.64 0
		+	324110 Petroleum refineries 14.2 14.1 0.079 0 0
		+	331111 Iron and steel mills 13.5 13.5 0 0 0
		+
		+
		+
		+	{| class="wikitable" border="1"  cellspacing="0"
		+	|-
		+	!  !! Sector !!GWP MTCO2E !!CO2 MTCO2E!! CH4 MTCO2E!! N2O MTCO2E!! CFCs MTCO2E
		+
		+	|-
		+	| 1 || [[Toaster]] ||  ||Jon Goettler, Leigh Fortenberry, Akshay Jayaram, Ian Price || W 12:30-12:45
		+
		+	|-
		+	| 2 ||[[Post hole digger]] ||  || Clay Crites, Rich Pantaleo, Nick Roche, Jeff Wang || W 12:45-1:00
		+
		+	|-
		+	| 3 || [[Umbrella]] ||  ||Mark Fuge, Changho Oh, Michael Cushman, Ben Berkowitz  || W 1:00-1:15
		+
		+	|-
		+	| 4 || [[Baby stroller]] ||  ||Brad Hall, Nick Selman, Madhur Paharia, Sixiao Joy Liu  || W 1:30-1:45
		+
		+	|-
		+	| 5 || [[Lamp stand mechanical arm]] ||  || Ella Swearingen, Raysel Martinez, Adam Aaron, Gwendolyn Barr|| W 1:45-2:00
		+
		+	|-
		+	| 6 || [[Guitar bridge]] ||  || Jeremy Ozer, Michael Harrison, Jonathan Kyle, Aaron Marks || W 2:00-2:15
		+
		+	|-
		+	| 7 || [[Ski boot walking attachment]] ||  || Jarrett Valeri, Randyka Pudjoprawoto, Takahiro Matsuura, Brandon Perry || F 12:30-12:45
		+
		+	|-
		+	| 8 || [[Exercise bike]] ||  || Abe Alexander, Cason Male, Shobhit Tandon, Madhu Bhagavatula ||F 12:45-1:00
		+
		+	|-
		+	| 9 || [[Self propelled lawnmower]] ||  || Graham Bannantine, Alex Kalberer, Dave Torres, Richard Zuckerman || F 1:00-1:15
		+
		+	|-
		+	| 10 ||  [[Ice cube maker]] ||  || Erica Dorfman, Eleanor McDaniel, Andrew Moore, and Nick Smarto || F 1:30-1:45
		+
		+	|-
		+	| 11 || [[RC Rock Crawler Truck]] ||  || Brad Henderson, Zahoor Rahimtoola, Mike Ricci, Alex Timmons|| F 1:45-2:00
		+
		+	|-
		+	| 12 || [[Weed whacker]] ||  || Timothy Andersen, Wesley Chu, Koji Ito, and Michael Menchaca || F 2:00-2:15
		+
		+	|}
	=Mechanical Analysis=		=Mechanical Analysis=

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Revision as of 21:22, 21 September 2008

Contents 1 Executive Summary 2 Stakeholder/Customer Needs 3 Product Use and Function 4 Parts Table 5 Design for Manufacturing and Assembly 6 Failure Modes and Effects Analysis 7 Design for Environment (DFE) 8 Mechanical Analysis 9 Process

Executive Summary

For the past three weeks, team 11 has been analyzing the Wheely King RC car made by Hobby Products International. Our research is done in order to improve on the current design and make the car significantly better at Rock Crawling. Rock Crawling is an upcoming sport, and our group feels that with the Wheely Kings transformation into a Rock Crawler, a significant profit can be made.

The Wheely King is a 1/12 replica, having many intricate parts, and while having most of the weight in the rear, the car is designed to raise up on its two rear wheels. After analyzing the gears, a ratio of 23:1 was calculated, showing that the car is initially designed for more acceleration than torque and a below average top speed (18 mph). Through DFMA analysis and DFX analysis we found..........*****Zahoor, write a little sentence or two here, say that we found many parts that could be produced as one. Keep in mind that you are talking to an executive, so do not get too technical....... Through these findings, many design changes are possible to make the car perform to the consumers desired needs. Here is our list of recommendations:

Manufacture ..(Ricci, enter 2 or 3 parts here)... out of metal instead of plastic. The stronger parts will make the product more durable and capable of withstanding large torques.

Reduce the gear ratio to increase the amount of torque the car produces. Increasing the size of the pinion gear does not require any new parts other than the gear its self and can reduce the gear ratio to 10:1. This will dramatically improve the performance of the car. High torque is essential in rock crawling, so overlooking acceleration and top speed is justified.

Zahoor...... put your input on the dfx stuff here. I.e. if you make these 5 parts into 1, it will save lots of money.....

Stakeholder/Customer Needs

There are a few stakeholders that need to be considered when designing and manufacturing a Nitro RC car. First, raw material users in the company that provide the parts made of plastics, metal and rubber. The design of the parts should not be too complicated that injection molds are adequate for the scale of part. If parts are small, it may be difficult to make an accurate mold of an important small part. With design for manufacturing in mind as well, there should not be too many different parts to be molded making it easier on component producers. Next in mind are those who assemble the cars. The design of the RC car must be easy because there are many parts. The parts cannot be too hard to assemble together because of positioning or the size or placement of necessary fasteners. Again, similar parts are important for assemblers because it may be hard to distinguish very similar parts in assembly that may make a big difference if assembled to wrong way. Finally, the end product is important to the customers who buy the RC car. Since we are considering an off-road RC car, the product has to be durable through a significant lifespan. The car has to be built for off-road rock crawling and tricky terrain. The car also needs to be easy to fix, modify or replace parts if broken.

Product Use and Function

Our particular product is a 4x4 remote control truck Wheeley King. It is an entry car for those interested in off road RC. The car is used and designed to crawls rocks and scale inclines with tricky terrain. These cars are not built for speed. They should be built to be durable because of the tough terrain it will be used on and should be durable for novice operator who are not as skilled and may damage the car easily. RC cars need to be built to be easily modified for improvement if someone chooses to improve the performance of their car.

The RC car runs off of a rechargeable battery. The battery supplies a Sturn motor. The motor is geared down to provide more torque to the tires so that the motor can handle the tough forces that an off-road RC car may encounter. Power is distributed to front and rear wheels, making the car 4 wheel drive. Differentials located on front and rear axles allow for powered turns and more power supply to a slipping wheel. The car is designed with a wide wheel base to guard against rolling. The wheel base also twists and has shocks to adapt to rough terrain to allow for reasonable traction on many types of uneven surfaces.

Parts Table

Notes:

Manufacturer part numbers were used

Masses omitted for non-vehicle components (i.e. radio transmitter, battery charger, included tools, etc.)

Design for Manufacturing and Assembly

Failure Modes and Effects Analysis

Design for Environment (DFE)

Sector GWP MTCO2E CO2 MTCO2E CH4 MTCO2E N2O MTCO2E CFCs MTCO2E Total for all sectors 646. 555. 57.4 20.6 12.8 221100 Power generation and supply 205. 203. 0 0 2.47 484000 Truck transportation 49.0 48.3 0.075 0.674 0 3221A0 Paper and paperboard mills 48.7 48.7 0 0 0 339930 Doll, toy, and game manufacturing 35.3 35.3 0 0 0 325211 Plastics material and resin manufacturing 29.4 29.4 0 0 0 562000 Waste management and remediation services 23.6 3.73 19.9 0.029 0 211000 Oil and gas extraction 20.7 3.47 17.2 0 0 325190 Other basic organic chemical manufacturing 18.1 12.4 0 5.64 0 324110 Petroleum refineries 14.2 14.1 0.079 0 0 331111 Iron and steel mills 13.5 13.5 0 0 0

	Sector	GWP MTCO2E	CO2 MTCO2E	CH4 MTCO2E	N2O MTCO2E	CFCs MTCO2E
1	Toaster		Jon Goettler, Leigh Fortenberry, Akshay Jayaram, Ian Price	W 12:30-12:45
2	Post hole digger		Clay Crites, Rich Pantaleo, Nick Roche, Jeff Wang	W 12:45-1:00
3	Umbrella		Mark Fuge, Changho Oh, Michael Cushman, Ben Berkowitz	W 1:00-1:15
4	Baby stroller		Brad Hall, Nick Selman, Madhur Paharia, Sixiao Joy Liu	W 1:30-1:45
5	Lamp stand mechanical arm		Ella Swearingen, Raysel Martinez, Adam Aaron, Gwendolyn Barr	W 1:45-2:00
6	Guitar bridge		Jeremy Ozer, Michael Harrison, Jonathan Kyle, Aaron Marks	W 2:00-2:15
7	Ski boot walking attachment		Jarrett Valeri, Randyka Pudjoprawoto, Takahiro Matsuura, Brandon Perry	F 12:30-12:45
8	Exercise bike		Abe Alexander, Cason Male, Shobhit Tandon, Madhu Bhagavatula	F 12:45-1:00
9	Self propelled lawnmower		Graham Bannantine, Alex Kalberer, Dave Torres, Richard Zuckerman	F 1:00-1:15
10	Ice cube maker		Erica Dorfman, Eleanor McDaniel, Andrew Moore, and Nick Smarto	F 1:30-1:45
11	RC Rock Crawler Truck		Brad Henderson, Zahoor Rahimtoola, Mike Ricci, Alex Timmons	F 1:45-2:00
12	Weed whacker		Timothy Andersen, Wesley Chu, Koji Ito, and Michael Menchaca	F 2:00-2:15

Mechanical Analysis

Process

describe your team process for coordinating and completing all tasks

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