CROP. P r o g r e s s Presentation. Project in Mechanical & System Design Engineering. Prof. Jungsu Kim. Jinwoo Lee Jaeshin Kang Dooki Ahn Tackwan Woo
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1 CROP P r o g r e s s Presentation Project in Mechanical & System Design Engineering Prof. Jungsu Kim Jinwoo Lee Jaeshin Kang Dooki Ahn Tackwan Woo
2 Index 1. CROP Overview 2. Prototype 3. Detailed Design 4. Detailed Design : Wheel-gear System 5. Detailed Design : Tie-load System 6. Detailed Design : Angle of Inclination 7. Future Plan
3 CROP Overview Crop, Car s Revolver Option-system for Parking Solve the Problem of the Urban Parking Space Provide the Convenience for User
4 CROP Video Crop, Car s Revolver Option-system for Parking There are 2 Main Systems, - Wheel Gear System : Switch the Power Direction - Tie-load System : Change the Steering Direction
5 Prototype Process Workshop & Machines - National Gwachon Science Center - Facilities : CNC, Workshop, Laser Cutter, 3D Printing, Etc. - Support : Instruction Learning, 3D Printing Filaments for Free Research & Purchase - Research the Components - Find the Solutions for making working one - Purchase : TM Screws, Shaft, Universal Joints, Motors, Etc. Making the Components - Make the Wheel-gear System using by 3D Printer & Laser Cutter - 3D Printing : Wheel Printed 1/3 Scaled Size - Laser Cutting : Main Gear, 2 Wheel Gears & 4 Power Switching Gears
6 Prototype Process Assembly & Fasteners - Assemble, Configure & Connect all the components - Assembly : Wheel-gear System, Tie-load system & the others - Fasteners : Bolts, Nuts, Screws, & Tight Fit Electronic Control - Control the System Using by Arduino - Main Motor : Describe the Power of Engine - 2 Sub Motors : Control the Tie-load length by rotation Verification Process - Verify & Test the Whole System - Find the Problem : Mechanism & Dynamic System - Analyze the Supplement Point
7 Prototype Bills Of Materials No. Material Price Quantity Sum 1 Coupling 11, ,000 2 TTM12R 10, ,500 3 Nut (ATM12) 8, ,000 4 Bearing 3, ,000 5 Tie-load Etc ,500 6 Universal Joint 10, ,000 7 Coupling 9, ,000 8 Gear 50, ,000 9 Bearing 6, , Driving Shaft Etc , Acrylic (10T) 25, , Motor 99, , Motor Etc , Etc ,700 Amount 366, A Competitive Price - The Existing SPAS Option Price : 1,000,000-2,000,000 - Ensure Validity as the Option System of the Existing Car
8 The Results of Prototype Undergo Trial and Error - Find the Problem during the Prototype Process - Modify the Design, way, component and Etc. - Especially, Materialization of the Prototype Motion Analyze the Supplement Point - Materialize the Dynamic Design through the Prototype - But, Need the 2 Supplement Points - Stress Analysis 2 Point : the Wheel-gear and Tie-load Make a Plan of the Detailed Design - According the Supplement Points - According the Feedback of the Spring Semester - Plan the 3 Detailed Design
9 Detailed Design The Wheel-gear System The Tie-load System Angle of Inclination - Stress Analysis - Load Calculation - Analysis Parts : 4 Gears - Determine the Dimensions - Stress Analysis - Load Calculation - Analysis Parts : TM Screw - Determine the Dimensions - Adduce the Limit Angle - Load Calculation - Set an Assumption - Center of Gravity Calculation - Set an Error Range
10 Scaled Model Nondimensional Determine the Variables & Dimension Matrix Case 1:1 Scale & Different Materials l m = 1 N l ρ m = 1 H ρ E m = 1 G E m m = 1 N 3 H m F m = 1 N 2 G F t m = G N H t v m = H G v a m = NH G a ω m = N H G ω α m = N2 H G α W m = G W N3 Material Property The Wheel-gear System : Acrylic, Tie-load : Aluminum ρ E H G Steel 7850 kg/ m GPa Acrylic 1280 kg/ m ~ 3.3 GPa Aluminum 2700 kg/ m GPa Steel 1 1 Acrylic Aluminum
11 Scaled Model Acrylic Case The Wheel-gear System m m = 1.6m F m = 58.82F t m = 0.33t v m = 3.07v l m = l ρ m = 1, 6 ρ E m = E a m = 9.41a ω m = 3.07ω α m = 3.07α W m = 0.34W Aluminum Case Tie-load System m m = 2.94m F m = 2.94F t m = t v m = v l m = l ρ m = ρ E m = E a m = a ω m = ω α m = α W m = 0.34W
12 Detailed Design The Wheel-gear System Load Calculation F 1 = kn, F 2 = kn F f = F 1 +F 2 = kn F f D wheel = 579 mm T max = kn m T = F f D wheel / 2 T = (2. 98) / 2 = 0. 86kN m < kn m T 579 mm T < T max
13 Detailed Design The Wheel-gear System Load Calculation T = F t1 d 1 / 2 N 2 F t1 d 1 = 4 F t2 d 2 4 F t2 d 2 = F t3 d 3 F t1 d 1 = F t3 d 3 Limiting Condition d 1 d 2 d 3 = N 1 N 2 : N 3 D wheel > P 1 + P 2 = P 3 Same the Gear Tooth Dimensions N 3 N 1
14 Detailed Design The Wheel-gear System Lewis Bending Strength Formula σ = M = 6Wl I/c Ft 2 σ = 6Wl Ft 2 = Wp WP = xp FY F 2 3 t/2 = l x t/2 Y = 2xP 3, x = t2 4l The Wheel-gear System Design through Excel Make an Excel table - Constitute of the Gear Train - Determine the Dimensions of Gears : Diameters, Teeth, Etc. - Gear teeth Design using by Lewis Bending Strength Formula
15 Detailed Design The Wheel-gear System Acrylic Case The Wheel-gear System
16 Detailed Design The Wheel-gear System F=10 mm a= 4. 2 mm b= 5. 3 mm t=6.6 mm
17 Detailed Design The Wheel-gear System 3048 mm mm 2032 mm 48 12
18 Future Plan Sun Mon Tue Wed Thu Fri Sat 19 Detailed Design - Oct. 19 Nov Complete all the Detailed Design - Complete the Poster Detailed Design 13 Poster Simulation - Nov. 13 Dec Complete the Simulation - Complete the Final Presentation Simulation 1 Final Presentation Final Report 11 Final Report Final Report - Dec. 01 Dec Complete the Final Report - Finish the Class
19 Thank you
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