This document presents the design of a multipurpose farming tiller. It contains sections on introduction, field of application, customer survey results, quality function deployment, functional decomposition, design/mechanism, material selection, manufacturing processes, stress analysis, cost analysis, and conclusion. Four students contributed different sections, including introduction, customer survey, QFD, and stress analysis. The tiller is designed to cut grass and plow land using one engine. It will be useful for small farms and gardens.

1. MULTIPURPOSE FARMING TILLER
PRESENTED BY
MD. NAJMUL ISLAM 14-01-07-014
MD. JAHID HASAN 14-01-07-029
MD. ASIF ABDULLAH 14-01-07-038
MD. SOLAMAN BADSHA 14-01-07-046

2. CONTENTS
• Introduction
• Field of application
• Survey
• QFD
• Functional decomposition & Black box
• Design & Mechanism
• Material & manufacturing process selection
• Stress analysis
• Cost analysis
• Conclusion

3. • Presented by
MD. Jahid Hasan
ID- 14-01-07-029

4. INTRODUCTION
• Multipurpose Farming tiller is an agricultural machine.
• by using one main engine it will cut grass and plough the land.
• Its an semi-automatic machine.

5. INTRODUCTION
FEATURES
 Petrol engine
 Two cutters used
-grass cutter
-plough tool
 Tools are easily removable
 Small in size
 Light weight

6. FIELD OF APPLICATION
• Farming Small size lands
• Weeding out grass.
• Gardening
• To easier the roadside Beautification process.

7. CUSTOMER SURVEY
• Small farmers, new entrepreneurs, & people owning garden were the participants.
• 40 people participated.
• Places they like to use our Machine-
65%
25%
10%
Farming
Gardening
Courtyard Farming

8. CUSTOMER SURVEY
• Features liked most-
• Price (17000 tk) acceptance-
45%
25%
30%
Multi tool Automatic run Low space adopting
0 20 40 60 80 100
It is Fine shoud be less

9. PRESENTED BY
MD. Asif Abdullah
ID 14-01-07-038

10. QUALITY FUNCTION
DEPLOYMENT

11. FUNCTIONAL DECOMPOSITION
Multipurpose
Farming Tiller
Processing
unit
Engine
Fuel Tank
Shaft (pulley,
bearing)
Frame
Cutter
Plough Tool Grass cutter
Handle Gear Box
Belt
Clutch
Pulley
Wheel

12. BLACK BOX:

13. PRESENTED BY
MD. Solaman Badsha
ID 14-01-07-046

14. DESIGN & MECHANISM

15. PARTS
• FRAME ENGINE CUTTERS

16. PARTS
PULLEY
BELT
WHEEL
CLUTCH

17. DESIGN & MECHANISM

18. DESIGN & MECHANISM

19. SELECTION OF MATERIALS
Parts Selection criteria Available material Material selected
Body frame  Specific strength
 Specific weight
 Cost
 Rust
 Steel metal
 Mild steel
 Cast iron
 Aluminum
 Mild steel
Shaft  Specific Strength
 Fatigue strength
 Wear resistance
 Cost
 Steel metal
 Mild steel
 Cast iron
 Aluminum
 Medium carbon steel
 Medium carbon steel
Wheel
 Radial strength
 Fatigue strength
 Withstand stiffness
 Corrosion
 Cost
 Mild steel
 Medium carbon steel
 Medium carbon steel
Cutter  Corrosion resistance
 Rust resistance
 Specific strength
 Fatigue strength
 Cost
 Stainless steel
 Mild steel
 Aluminum
 Alloy steel
 Stainless steel

20. SELECTION OF MANUFACTURING (JOINING) PROCESS
Process Selection Criteria Available Process Selected Process
Joining for
Frame & Wheel
® Joining Strength
® cost
® Easy operable
®Availability
Good finish
® Arc Welding
® MIG Welding
® TIG Welding
® Arc Welding
Joining for
Shaft & Cutter
® Good Finish
® Strength
® Availability
® Easy operable
® Cost
® Arc Welding
® MIG Welding
® TIG Welding
® TIG Welding

21. STRESS ANALYSIS
• In our Multipurpose Farming Tiller machine the frame carries most of the load
• We have done this analysis by using solid works software.
• . In this process we’ve put both pressure & force over the frame
• produced stress over the frame is much less of its yield strength

22. STRESS ANALYSIS

23. PRESENTED BY
MD. Najmul Islam
ID 14-01-07-014

24. COST ANALYSIS
• To make healthy business decisions
• To look at all costs, to determine the correct selling price.
• To see if we're in a good financial position to expand your business.

25. COST ANALYSIS
Cost
Variable
Cost
Material
Mild Steel
Bar
Engine
Grass
Cutter
Plough tool
Wheel
Shaft
Bearing
Bevel Gear
Belt
Pully
Nut & bolt
Bush
Hand gripper
Labour &
Assemble
Manufacturing
Overhead
Equipment
Utilitites
Transportation
Electricity bill
Fixed
Cost
Rental
Salary Payment
Insurance
Furniture

26. BREAK EVEN ANALYSIS
Unit
Increment
Unit
Price(BDT)
Fixed
Cost(BDT)
Unit
Variable
Cost(BDT)
4
17000.00 134400.00 8422.00
Break Even Point Break Even Sales Point
15.66798788 266355.7939

27. BREAK EVEN ANALYSIS
0.00
100000.00
200000.00
300000.00
400000.00
500000.00
600000.00
700000.00
800000.00
1 2 3 4 5 6 7 8 9 10 11
BREAK EVEN ANALYSIS
Fixed Cost Variable Cost Sales Total Cost

28. CONCLUSION
In the perspective of our country multipurpose farming tiller is very useful.

29. Thank You