MB PLOUGH.pptx

It explains Design of MB Plough and parts

1. DESIGN PROCEDURE FOR MOULD BOARD PLOUGH PRESENTED BY: GOWTHAM PG20AEG12122 JR.M.Tech DEPT.OF FMPE

2. Introduction Types of plough Component of MB plough Types of mould board Types of share Types of landside Accessories of the plough Design procedure for M.B ploughs Reference CONTENTS

3. It is one of the oldest of all agricultural implements. Considered to be the most important tillage implement. It consumes more traction energy than any other operation It is a primary tillage equipment used primarily in areas with sufficient rainfall for better soil inversion, green manuring, burying heavy weed growth underneath the soil for better decay. It is available for animals and tractor operation. Mould Board Plough

4. cutting the furrow slice. lifting the furrow slice. inverting the furrow slice and, pulverizing the soil It is used for covering grass into the soil immediately after rains Does four major jobs:

5. Types of MB Plough : 1. According to power source Animal drawn Tractor drawn 2. According to type of hitch Trailed Semi-mounted Mounted 3.According to direction of throw of soil One way Reversible (two way)

6. 1) Plow Bottom 2) Plow Frame 3) Attachments (Coulters & Jointers) 4) Wheels 5) Lifting Mechanism 6) Plow Hitch Component of MB Plough:

7. It is three sided wedge.    There are three main parts i.e. a)mould board, b)landslide and c)share which are rigidly fastened to the frog. Its main function is to cut the furrow slice, shatter the soil and invert the furrow slice to cover trash.  The size of the plow bottom is the width of furrow it is designed to cut. 1) Plow Bottom:

8. a) Share: It is the part of plow bottom which actually penetrates into the soil and makes a horizontal cut below the surface. b) Mould Board: It is the curved part which lifts and turns the slice. c) Landslide: It is the flat plate which bears against and transmits the rear side lateral thrust of plow bottom to the furrow wall.  d) Frog: It is the base of the plow bottom to which other parts are attached. e) Tail Piece: It is the extension of mould board which helps in turning the furrow slice.

9. Share point: It is the forward end of the cutting edge which actually penetrates into the soil Cutting edge: It is the front edge of the share which makes horizontal cut in the soil. It is beveled to some distance. Share: This penetrates into the soil and makes a horizontal cut below the surface.

10. Wing of share: It is the outer end of the cutting edge of the share. It supports the plough bottom Gunnel : It is the vertical face of the share which slides along the furrow wall. It takes the side thrust of the soil and supports the plough bottom against the furrow wall. Cleavage edge: It is the edge of the share which forms joint between moulboard and share on the frog. Wing bearing: It is the level portion of the wing of the share, providing a bearing for the outer corner of the plough bottom

11. Slip share: One piece share with curved cutting edge, having no additional part. Common type of share generally used by the farmers, as it is simple in design. Disadvantage is that entire share has to be replaced if it is worn out. Slip-nose Share: It is a share in which the point of share is provided by a small detachable piece. It has the advantage that the share point can be replaced as and when required. If the point is worn out, it can be changed with a new nose without. Types of Shares

12. c) Shin share: It has a shin as an additional part. It is similar to slip share with a difference that an extension is provided by side of the mould board. d) Bar point share: It is the share in which point of share is provided by an adjustable and replaceable bar. This bar serves the purpose of point of share and landslide of the plow

13. General purpose: Stubble type Sod or Breaker Slat type. b) Mould Board:

14. General Purpose: It is a mould board having medium curvature lying between stubble and sod types. The mould board is fairly long with a gradual twist, the surface being slightly convex. It turns a well defined furrow slice and pulverizes the soil thoroughly. Slat type: It is a mould board whose surface is made of slats placed along the length of the mould board, so that there are gaps between the slats. This type of mould board is often used, where the soil is sticky, because the solid mould board does not scour well in sticky soils.

15. It is short but broader mould board with a relatively abrupt curvature which lifts, breaks and turns the furrow slice. This is best suited to work in stubble soil. Stubble soil is that soil in which stubble of the plants from the previous crop is still left on the land at the time of ploughing . This type of mould board is not suitable for lands with full of grasses. Sod type: It has long mb with gentle curvature which lifts and inverts the unbroken furrow slice. This is very useful where complete inversion of soil is required by the farmer. This type is used in sod soils (soil with much of grass). Stubble type:

16. This landside is about 25cm long & is used in plough where landside pressure is not a factor. This landside is 30cm long & is used for normal ploughing condition. This landside is 40cm long &has a landside heel. It is used in abrasive soil. This landside is 50cm long &has a landside heel. It is used in mould board ploughs which does not have rear furrow wheel. It gives support to a plough bottom. Types of landside:

17. Coulter: It is a device used to cut the furrow slice vertically from the land ahead of the plough bottom. It cuts the furrow slice from the land and leaves a clear wall. It also cuts trashes which are covered under the soil by the plough. Accessories of the plough

18. It is a small irregular piece of metal having a shape similar to an ordinary plough bottom. It looks like a miniature plough Its purpose is to turn over a small ribbon like furrow slice directly in front of the main plough bottom. Gauge wheel It is an auxiliary wheel of an implement to maintain an uniform depth of working. It is usually placed in hanging position. Jointer

19. 1. Establish following points: Type and kind of mould board Tillage depth (a) Furrow slice width (b) b/a ratio (1.1 to 1.5). 2. Decide the angles of share: Load angle =14-18 degrees Share angle =35-45 degrees Cutting angle =22-28 degrees DESIGN PROCEDURE FOR MB PLOUGHS

20. 3. Calculate DBHP of Tractor: DBHP= 60% of BHP 4. Calculate drawbar pull: Drawbar pull available from tractor is given by

21. 5. Calculation of width of implement: Where. D i = draft requirement of implement, kg n=number of bottoms in MB plough d p = depth of plowing, cm R=specific resistance of soil, kg/cm 2

22. 6. Forces acting on MB plough bottom: Draft (D) = P cos θ cos α Side draft (S) = P cos θ sin α Vertical component (V) = P sin θ cos α Where , P = Pull of plough, kg/N θ = Angle of pull with horizontal plane, degrees α = Angle of pull with vertical plane, degrees

23. 7. Design of landside of MB plough: Length of landside Where, L is =length of landside from the point of share to heel of landside cm B= width of landside, cm Ø= angle of soil granular friction, (degrees) α = inclination of pull with vertical plane, (degrees)

24. Width of landside: Usually width of landside is taken as one third of throat width of share Thickness of landside (t): Where, f i = permissible stress in the landside, kg/cm 2 W= uniformly distributed load on landside surface kg/cm 2 T= thickness of landside, cm/mm.

25. Maximum stress developed in share: Where, F= max. stress developed in share,kg /cm 2 b= width of shank, cm t= thickness of share, cm B= a constent , depends on length-breadth ratio of share.

26. Its usually made from welded steel, pressed steel sheet or cast steel. Hardness of frog made from steel casting should be 130-201 HB For heavy duty cast iron 160-260 HB 9).Design of frog

27. Farm Machinery Design : Principles And Problems, - D.N SHARMA & S MUKSEH Elements of Agricultural Engineering - JAGDISHWAR SAHAY References