1. DESIGN AND DEVELOPMENT OF GRINDING ATTACHMENT ON LATHE MACHINE

2. CONTENTS ABSTRACT INTRODUCTION OVER VIEW OF LATHE MACHINE
OVER VIEW OF GRINDING MACHINE
COMPONENTS ON ATTACHMENT
APPLICATIONS OF GRINDING ON LATHE
ADVANTAGES
DISADVANTAGES
FUTURE SCOPE
CONCLUSION

3. ABSTRACT
Grinding attachment is special attachment which is purposely made for lathe to perform grinding operation in lathe. While in turning or facing process we can obtain only Max 2 delta surface finish with tool marks. But by this attachment we can obtain 4Delta surface finish without tool marks and scoring marks.

4. INTRODUCTION
In modern manufacturing and assembling, high dimensional accuracy and fine surface finish play an important role. The grinding process is commonly used as finishing process.
One of the best low cost methods of producing such parts is by a cylindrical grinding attachment on a lathe machine. Lathe present study heavy duty lathe was retrofitted with a grinding attachment.

5. OVER VIEW OF LATHE MACHINE
A lathe is a machine that shapes pieces of material. The most common lathes are woodworking ones. The wood sits between two parts of the lathe called the headstock and the tailstock.
The two parts hold the work in place and spin it quickly. When using wooden lathes the pieces are shaped by hand with a chisel, while lathes that shape other materials, such as metal, have chisels attached to an adjustable carriage that holds the cutting tools in contact with the spinning metal. The carriage is controlled remotely by the operator.

6. Line diagram of lathe

7. Operations of lathe machine
Facing
Turning
Drilling
Tapering
Threading
Boring
Chamfering

8. Over view on grinding machine
Grinding is a process of removing material metal by the application of abrasives which are bonded to from a rotating wheel. The work piece rotates about a fixed axis and the surfaces machined are concentric to that the axis.
Grinding is used to finish work pieces that must show high surface quality. As the accuracy in dimensions in grinding is of the order of  mm, in most applications it tends to be a finishing operation and removes comparatively little metal, about 0.25 to 0.50 mm depth.

9. SURFACE GRINDING
Surface grinding is used to produce a smooth finish on flat surfaces. It is a widely used abrasive machining process in which a spinning wheel covered in rough particles (grinding wheel) cuts chips of metallic or non metallic substance from a work piece, making a face of it flat or smooth.

10. Components of attachment on lathe
Motor
Grinding wheel
Shaft
Mounting plate

11. Motor
Motor is a device, which creates a motion that the electrical energy converts into mechanical energy.
In this attachment we can use AC(alternate current) motor for rotating the grinding wheel.

12. SPECIATIONS FOR MOTOR motor alternate current horse power 1/6 rpm 2800
phase
1 or 3
Kilo watts
0.37
cycle
~50
volts
220

13. Grinding wheel
A grinding wheel is a wheel composed of an abrasive compound and used for various grinding (abrasive cutting) and abrasive machining operations. Such wheels are used in grinding machines.
It is a hard abrasives called grits.

14. Speciations of grinding wheel
Abrasive Grinding Wheel
Carborundum Universal
Aluminium Oxide or silicon carbide
200 mm Diameter
20 mm Thickness
31.75 Bore
Max.Speed 4200 Rpm
Grain size 60 microns
Hardness - I

15. Mounting plate The plate bears the whole weight of the attachment.
A MS plate of 12" × 6“ (inches) is employed for this attachment. The plate is placed on the lathe after removing Tool post from it.
The plate bears the whole weight of the attachment.

16. Shaft
The Rotating shaft ( dia 17mm, length 20cm) is used for the rotation of the Grinding wheel; the power from the motor is transmitted to the rotating shaft through motor. The rotating shaft is inserted into the motor.

17. Assembling of Grinding machine
Grinding is used to finish work pieces that must show high surface quality (e.g., low surface roughness) and high accuracy of shape and dimension

18. Working process of surface grinding
The surface grinder is composed of an abrasive wheel, the work piece is holding by the chuck and the motor switch is on then the wheel is rotating then the feed is given, then unwanted material will be removed.

19. Lubrications for different materials
WORK MATERIAL
CUTTING FLUIDS
HARDNESS (Approximately)
1 Pascal= 1N/m2 = 1Kg/m
Aluminium, copper
Light duty oils
MPA, MPA
Steel, magnesium
MPA, MPA
Gray Cast iron, , stainless steel
Heavy duty oils
MPA, MPA
Mild steel
Heavy duty water soluble oils
MPA

20. Grinding attachment on lathe parameters
UNITS
PARAMERTS
LEVEL HIGH
LEVEL LOW
m/mm
Work speed 15 6
mm/rev
feed
0.3
0.1
Micro meters
Depth of cut
100 50

21. Assembling of Grinding Attachment on lathe

22. Estimation of price According to market price Lathe machine - 1,75,000
Surface grinding machine - 1,26,000
But our project price is
Grinding attachment on lathe by using scarp ,000

23. Applications of Grinding Attachment On Lathe
Automobile industries
Manufacturing industries
Small scale manufacturing industries
Surface finishing process

24. Do and Dont’s While cutting the material Wear the safety dress.
Wear the glasses.
Lubricant will be used.
Wear Gloves for safety.
Don't give feeding continues because the material and grinding wheel will be damaged.

25. Advantages and Disadvantages
Fixture cost is low.
No need of purchase special machine for this.
Production cost is low.
Disadvantages
Accuracy is little bit low.

26. Scope of future
A further object of the invention is the provision of a grinding machine which is mounted on the compound slide of a lathe in a manner so as to be swung to various grinding positions not heretofore possible in prior machines of the nature.

27. B YOGESWARARAO
D POLINAIDU
N SAI MANIKANTA REDDY
CH GOPAYA
CH SURESH