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Multipupose grass cutting machine
- 1. IPE- 304 Product Design-IΙ Sessional Multipurpose Grass Cutting Machine Presented By: Lab Group- 03 1. Jahangir Kabir Anik (1008002) 2. Md. Sabbir Hossain(1008003) 3. Jannatul Bushra (1008005) 4. Sohel Rana (1008022) 5. Imran Hasan Tusar (1008024) 1
- 2. Contents Introduction Customer Survey Quality Function Deployment Black box & Functional Decomposition Material & Manufacturing Process Selection Stress-Strain Analysis Cost Analysis Conclusion 2
- 3. Our Selected Product is Multipurpose Grass Cutting Machine Causes for selection: • A common daily used equipment • No local manufacturer • Encouraging gardening 3
- 4. Customer Survey Number of Persons Surveyed: 25 Survey location: Lawns of residential areas & halls Focus Group: Middle aged gardeners 4 One of the vital Survey Questions was 0 10 20 30 40 50 60 70 80 Dis-satisfied Indifferent Satisfied Highly Satisfied Percentageofpeople Satisfaction Level 68 percent dis- satisfied !!
- 5. 5 Yes No Not now 64% Will you buy a manually operated grass cutter?
- 6. Operating facility with pedal Aerating facility Adjustable cutter height Brushing facilityNo fuel needed Simultaneous operation Two alternative driving force 6
- 8. QFD
- 9. BLACK BOX METHOD Product presented as a functional system Energy Mechanical energy Information Function Smooth uniform cutting of grass Information 1.Cutting speed(rpm) 2.Running speed(m/s) 3.Safety Precaution 1. Grass of desired height after cutting 2. Aerated healthy green grass 3. Collected grass in two containers
- 10. 10
- 11. 11 Cutting & Aerating Unit Cutter Frame & Container Flat blade (1) Spiral blade(6) Blade holders(5) Shaft(1) Aerator Shaft(1) Fin(8) Half Cylindrical portion Handle Gripper Long Handle Nob (2) Nut & Bolt (2 pair) Sheet metal Roller strard with multiple holes Roller
- 12. 12
- 13. 13 Some Important Components of Our Product
- 14. 14
- 15. 15
- 16. 16
- 17. Arrangement for Pedaling & Pushing Drive
- 18. 18
- 19. Purchasing Material Here are the materials we are going to purchase 1. Nut-bolts 2. Bearing 3. Plastic Seat 4. Wheel 5. Chain 6. Handle Gripper 7. Sprockets 19
- 20. Comparison of Mechanical Properties of Some Materials 20 Property Cast iron Mild steel Wrought iron Density (kg/m^3) 7200 7858 7600 Shear Modulus (N/m^2) 5.00E+10 8E+10 2.5E+8 Coefficient of Thermal Expansion(/k) 1.21E-05 1.20E-5 1.22E-5 Elastic Modulus (N/m^2) 6.62E+10 2.05E+11 2E+8 Compressive Strength(N/m^2) 5.72E+8 4.077E+8 3.03E+8 Material Selection
- 21. 21 Goals Number of positive decisions, N=n(n-1)/2=6(6-1)/2=15 Positive decisions Relative emphasis Coefficient, α 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Cost 1 0 1 0 0 2 0.13 Dimensional accuracy 0 0 1 1 0 2 0.13 Availability 1 1 1 0 1 4 0.27 Power requirement 0 0 0 1 0 1 0.07 Surface Finish 1 0 1 0 0 2 0.13 Metallurgical change 1 0 1 0 1 1 4 0.27 Total Number of Positive Decisions 15 ∑α =1.00 Determination of Relative Importance by Digital Logic Method
- 22. Manufacturing Process Selection for Cutting Tubes and Rods 22 Goals Weighting Factor, α Saw Cutting Gas cutting Laser cutting Scaled Property, β Weighted Score, αβ Scaled Property, β Weighted Score, αβ Scaled Property, β Weighted Score, αβ Cost 0.13 100 13.00 80 10.40 60 7.80 Dimensional accuracy 0.13 75 9.75 50 6.50 100 13.00 Availability 0.27 100 27.00 80 21.60 40 10.80 Power requirement 0.07 100 7.00 80 5.60 60 4.20 Surface Finish 0.13 80 10.40 60 7.80 100 13.00 Metallurgical change 0.27 100 27.00 75 20.25 100 27.00 Material Performance Index, γ 94.15 72.15 75.8
- 23. 23 Goals Weighting Factor, α Turning in Lathe Machine Extrusion Scaled Property, β Weighted Score, αβ Scaled Property, β Weighted Score, αβ Cost 0.27 80 21.60 100 27.00 Dimensional accuracy 0.27 80 21.60 100 27.00 Force requirement 0.12 100 12.00 60 7.20 Power requirement 0.07 80 5.60 100 7.00 Surface Finish 0.07 80 5.60 100 7.00 Metallurgical change 0.20 80 16.00 100 20.00 Material Performance Index, γ 82.40 95.20 Manufacturing Process for Shaft Cutter, Aerator , Brush & Wheel
- 24. 24
- 25. 25 Static Nodal Stress Distribution Spectrum
- 26. 26Static Displacement (Strain) Distribution Spectrum
- 27. Cost Analysis 27
- 28. 28
- 29. • 81,52,500 Tk.Raw material Used in production per year: • 6,60,600 Tk.Total manufacturing overhead per year: • 95,14,500 Tk.Total manufacturing Cost per year: • 3,09,400 Tk.Total administrative cost per year: • 60,000 Tk.Total marketing cost per year: • 71,56,800 Tk.Total non-manufacturing overhead per year: 29
- 31. 31 8408000 9823000 11238000 12653000 14068000 15483000 16898000 18313000 19728000 0 5000000 10000000 15000000 20000000 25000000 30000000 0 100 200 300 400 500 600 700 800 900 Cost&Revenue Units Sold Fixed Cost Total Cost Total Revenue Linear (Total Cost) Break Even Quantity=531 units
- 32. 32 Main focus was the following customer requirements •Adjustable cutter height •Grass collection facility •Aerating option •Lightweight •Cheap
- 33. Any Query 33
- 34. 34
Editor's Notes
- What is the project about? Define the goal of this project Is it similar to projects in the past or is it a new effort? Define the scope of this project Is it an independent project or is it related to other projects? * Note that this slide is not necessary for weekly status meetings
- * If any of these issues caused a schedule delay or need to be discussed further, include details in next slide.
- Duplicate this slide as necessary if there is more than one issue. This and related slides can be moved to the appendix or hidden if necessary.
- The following slides show several examples of timelines using SmartArt graphics. Include a timeline for the project, clearly marking milestones, important dates, and highlight where the project is now.