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Automated Oiling System
P08351 – Concept Design Review
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Agenda 1:00-1:15 Overview of project
1:15-1:50 Mechanical Engineering subsystems 1:50-2:10 Electrical Engineering subsystems 2:10-2:25 Proposed integrated system 2:25-3:00 Open Discussion/ action & issues
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Team members/roles Jim Taylor IE Guide jbteie@rit.edu John Kaemmerlen
Discipline Role address Jim Taylor IE Guide John Kaemmerlen Consultant John Bonzo Matt Zapotoski Project Lead Sharif Hdairis CE CE/EE support Joe Jennings ME ME support Bob Shackelford
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What's the problem? Parlec currently manufactures a wide variety of tool holders The following process currently exists: Manually dip Manually drain Stand on paper towels to dry Resulting complications: excess labor required (2-3 workers) oil waste part coverage inconsistency hinder ability to meet throughput
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Window of opportunity In response, Parlec has requested a machine to automate the oiling process.
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Concept Selection Concept Generation: Breakdown subsystems even further, develop possible solutions and corresponding pros and cons Concept Screening: Develop a list of applicable selection criteria and use Pugh’s Method to compare possible solutions Concept Scoring: Apply weights to each individual criterion in order to confine results to one or two possibilities.
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Mechanical Engineering Subsystems
Loading/Unloading Oil Application Part Cleaning Remove excess oil
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Loading/Unloading Mechanism
SUBFUNCTION SEARCH RESULTS POSITIVES NEGATIVES LOADING / UNLOADING Hooks easy to place part, simple, linear, cheap, most flexible capacity, prone to damage part, strength Racks part versatility (size), offers strength and stability bulky, will require/ take up space Fixture flexible in design (custom), holds parts more securely cost, additional labor/ increased setup time Magnets durable, part security part versatility? , cost Fixture Selection Criteria Weight Hooks Magnets Loose fitting fixture Tight fitting fixture Pegs None durability 0.15 + part versatility 0.25 - tolerance protection 0.5 Fabrication cost 0.1 Total 0.05 -0.1
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Oil Application -0.2 SUBFUNCTION SEARCH RESULTS POSITIVES NEGATIVES
Apply Oil Dip simplest uses excess oil, may not coat part completely Spray more uniform coat contaminates air, requires energy to apply, may not coat part completely (air pockets) Pour sloppy, difficult to apply full application, slow Tumble more thorough (prevent air pockets) requires additional equipment, potential to damage part Brush cheap, versatile bristles wear out, may brush off onto part Apply Oil Selection Criteria Weight Dip Pour Tumble Brush Spray Part versatility 0.15 - speed 0.1 part coverage 0.4 running cost 0.05 maintenance tolerance protection 0.25 Total -0.6 -0.8 -0.65 -0.2
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Cleaning -0.5 SUBFUNCTION SEARCH RESULTS POSITIVES NEGATIVES CLEANING
Air available in facility, low risk of damaging part expensive, will contaminate air, noisy Brushes cheap, available, single could fall apart, not thorough coverage, bristles on part? Rags must be maintained, manually operated Solvent/Chemicals will remove all debris messy, lengthen process (drying time req'd), may not remove all debris Cleaning Selection Criteria Weight Air Brushes Rags chemicals Part versatility 0.2 - speed part coverage 0.4 running cost 0.1 - - maintenance Total -0.80 -0.5
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Remove Excess Oil SUBFUNCTION SEARCH RESULTS POSITIVES NEGATIVES
Spin quick, reliability of result, versatile expensive, potentially dangerous, additional equipment required Hang/Dip simplest, cheapest slowest, requires space Wipe slow, unreliable Air quick, consistent, low maintenance req'd messy, noisy, expensive Heat decreases viscosity costs money to produce heat Remove excess oil Selection Criteria Weight Air Spin Wiping Drip Part versatility 0.2 speed - part coverage 0.4 running cost 0.1 + maintenance Total -0.4 -0.5
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Electrical Engineering Subsystems
Variable Speed Drive System
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Control Panel
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Electrical Control System
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Mixed Signal Input Discrete variable Continuous variable
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Variable Speed Drive System
SUBFUNCTION SEARCH RESULTS POSITIVES NEGATIVES VSD System AC Motor w/ prebuilt drive Cheaper, better power efficiency, easy to replace parts and maintain. More expensive than custom drive solution. AC Motor w/ custom drive Cheapest, better power efficiency. Wiring and quality of drive components is lower. Harder to interface with processing unit. Replacing drive is harder. DC Motor w/ prebuilt drive Better acceleration, comparable maintenance to AC/prebuilt High power DC drives are very expensive. DC Motor w/ custom drive Better acceleration. expensive, harder to maintain and replace parts, design time of custom drive. Drive System Selection Criteria Weight AC/Custom AC/prebuilt DC/prebuilt DC/custom fabrication cost 0.25 - maintenance cost + reliability 0.2 ease of implementation start/stop performance 0.1 Total 0.4 -0.4
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Integrated Solution Loading/Unloading : hooks, tight fitting, loose fitting fixture Oiling: Dip and spray Cleaning: Air and rags Remove excess oil: Air and drip VSD System: AC/DC with prebuilt drive and AC with custom drive
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Integrated Solution TOTAL -3 -5 -2 System loading/unloading cleaning
apply oil removing excess oil VSD 1 hooks air dip ac/prebuilt 2 tight fitting ac/custom 3 loose fitting rags spray 4 drip dc/prebuilt 5 6 7 Criteria/ Machine # 1 2 3 4 5 6 7 ease of manufacture - fabrication cost + ease of use for user durability consistency safe maintenance TOTAL -3 -5 -2
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Final Concept
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QUESTIONS????
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