its presentation on project of continuous bar polishing machine

1. CONTINUOUS BAR(STAINLESS STEAL)BAR POLISHING MACHINE”
A
Mini project
Submitted in partial fulfillment
For the award of the
Degree of Bachelors of Technology
In Department of Mechanical Engineering
(Academic session 2018-22)
Project Guide: SUBMITTED BY:
DR.MOHAN B H.N.ROHITH 1DA18ME040
Project Co-ordinators: HARISH T.K 1DA18ME042
BYREGOWDA K C HEMANTH H S 1DA18ME044
RATHIKA HEMANTH T N 1DA18ME045

2. TABLE OF CONTENT
1. ABSTRSCT
2. INTRODUCTION
3. LITRATURE SURVEY
4. OBJECTIVES
5. METHODOLOGY
6. WORKING PROCEDURE
7. RESULTS
8. CONCLUSION
9. REFERENCE

3. ABSTRACT
 This project aims to develop a polishing machine that performs different polishing stages continuously,
eliminating the idle time in the polishing process.
 The prototype of the polishing machine fabricated according to the design, and used to polish several types
of materials. The results show that this machine can polish stainless-steel flat bars, square tubes and
rectangular tubes into 10mm-150mm width products, operate at a high speed of 1000-1200 rpm, and, most
importantly, execute multiple polishing operations continuously.
 The proposed polishing machine is helpful to the automation of the polishing industry.

4. INTRODUCTION
 Polishing is one of the oldest processing method used to generate smooth and mirror shiny surface.
 Polishing is a process of generating smooth and shiny surface on the workpiece .
 This operation is mainly done on the face of components in order to improve the surface finish. prevent
contamination of work pieces, remove oxidation, create a reflective surface, or prevent corrosion.
 The surface finish obtained depends on grit size of the abrasive used . So, polishing is a multistage process
and starts with a rough grit size abrasive and each subsequent stage of polishing uses a finer higher grit
abrasive until the intended surface finish is obtained.
First cut finish
Medium
polished finish
Very fine
polished finish

5. continued……

6. continued……
 The rough grit size removes the imperfections on the work piece such as pits, nicks, lines and scratches
from the workpiece and the finer abrasives leaves progressively finer lines that are not visible to the
naked eye.
 This helps in fast movement of the workpiece from rough size polishing to very good surface finish at one
continuous operation.
 The main purpose of developing this polishing machine is to polish workpieces continuously in a stretch.
The polishing machine which was used previously was performing operations intermittently.
continued……
 The rough grit size removes the imperfections on the work piece such as pits, nicks, lines and scratches
from the workpiece and the finer abrasives leaves progressively finer lines that are not visible to the
naked eye.
 This helps in fast movement of the workpiece from rough size polishing to very good surface finish at one
continuous operation.
 The main purpose of developing this polishing machine is to polish workpieces continuously in a stretch.
The polishing machine which was used previously was performing operations intermittently.

7. LITURATURE SURVEY
 Metal Polishing Machine Market continues to evolve and expand in terms of the amount of companies,
products, and applications that illustrates the expansion perspectives. It also analyzes key emerging trends and
their impact on present and future evolution. This is from present global report
 Mr. Shrikant Bharamu Pawar , Mr. Swapnil Kumar Koli. et al. studied bar polishing and explained
inaccuracies present on the surface of workpiece is reduced by polishing machine . Surface finish of range10-
15µ obtained using this bar polishing machine.
 Erinle et al. has studied and developed metallographic polishing machine. The main aim of this study is to
develop a machine which can polish metal in order to get a flat and smooth surface. They concluded that their
developed machine has ability to grind and polish metal components.

8. continued……
 Wang, G.L. and Wang,Y.Q. et al has developed a special polishing machine. They studied the different process
parameters considering surface roughness and polishing efficiency using Taguchi method. They concluded by
giving optimal combination of process parameters.
 Fernandez et al. has developed a newer methodology for abrasive polishing process. They studied the
feasibility of polishing method using robotics. They concluded that it is possible to predict the final surface
quality using the methodology they developed.
 Barbuto et al. has developed procedures in order to automate polishing of ceramics. They studied these
procedures considering Struers automatic polishing machine. They concluded that their procedure produces a
very high-quality product.

9. OBJECTIVES
 To develop a machine which can continuous polish a bar(stainless steal)continuously.
 If the specimen is made different materials based on requirements the speed of the polishing motor is
controlled.
 4 different stages of polishing is done continuously using four different polishing wheels.
 Different polishing wheels are arranged according grit sizes of the polishing wheel
 Final outcome of bar should be well polished so that there is no unevenness on the surface of the specimen.

10. METHODOLOGY
 Preparing drafting and modelling .
 Suitable material selection according to the requirement.
 Four different dc motors fitted with different abrasives wheels are used for continuous polishing
of bar (stainless steal).
 Different grit sizes of abrasive are used in order to get the final mirror polished bar.
 A voltage regulator is used to control the speed of the motor.
 An unpolished bar passes through different polishing wheels continuously
 Finally, bar (circular or rectangular) will be mirror polished

11. WORKING PROCEDURE
 The working prototype model consists of components , Base frame, 4 Dc motors ,
polishing wheels with different grit sizes,and connecting shaft.
 The design in the upcoming slide will show the schematic and working setup at sight
respectively

12. Continued……
Top view

13. Continued…..
FRONT VIEW

14. Actual working setup

15. WORKING VEDIO

16. CONTINUED……
The left illustration shows the steel surface after the light polishing process.
The right illustration shows the steel surface before polishing process
DETERMINATION OF MATERIAL PROPERTIES USING FEM MODEL

17. CONTINUED……
CTV5 ANALYSIS OF MATERIAL VOLUME REMOVAL DURING POLISHING PROCESS

18. CONTINUED…..
Comparison of the removed volume between simulation and the
polishing attempts for a polishing force of 5 N
Comparison of the removed volume between simulation and the
polishing attempts for a polishing force of 10 N

19. RESULTS
 Machine is capable of removing fine or heavy scratches or defects on the specimen.
 Mechanical polishing offers numerous benefits, providing products with an improved surface
finish, reduced product adhesion, better surface cleanability , and higher aesthetic appeal.
 The simulation results from the material removal’s depth were compared with the polishing attempt’s results.
The results show that for each individual force variation attempt, the material removal’s depth was constant
through the repetition of the number of polishing paths
 The FEM simulation model results showed a good prediction of the material removal’s depth compared to
the results obtained by the polishing attempts conducted on steel samples

20. conclusion
This machine can be used for polishing stainless steel
flat bars, rectangular tubes and square tubes
After the final stage of polishing, it is observed that the
bar gained fine surface finish .
The polishing machine can be designed for carrying
multiple heads and can be made to incorporate multiple
degree of freedom of movement.

21. Continued….
Negligible metal surface removed by using this bar
polishing machine.
Dimensional inaccuracies, tool marks, uneven
polishing are on the surface of workpiece are reduced

22. REFERENCE
 Neethu Vijayan, Surya Akshar Raj (2019) ., Polishing Machine , IIETA :485-493
 Pawar, S.B., Koli, S.K. (2016). Design and fabrication of bar polishing machine. International Research
Journal of Engineering and Technology (IRJET), 3(6): 255-258.
 Erinle, T.J., Awopetu, O.O., Ukoba, O.K. (2011). Development of metallographic specimen polishing
machine. The Pacific Journal of Science and Technology, 12(2): 69-81.
 Wang, G., Wang, Y.Q. (2009). Research on polishing process of a special polishing machine tool.
Machining Science and Technology-An International Journal, 13(1): 106-121.
 Fernandez, A., Antonia, D.J., Javierre, C., Jorge, S. (2015). Surface roughness evolution model for
finishing using an abrasive tool on a robot. International Journal of Advanced Robotic Systems, 12(9): 1-11

23. Continued….
 Rathod, A.S., Rathod, R.K., Jagale, J.J., Kamale, V.C., Avanti, N.M. (2018). Design and
development of metallographic processing laboratory setup. International Journal for Scientific
Research and Development, 5(12): 1039-1041.
 Wu, X.J., Yang, Y., Tong, X., Shu, X., Li, Y. (2019). The grey theory combining the taguchi
method for the best parameters: A case study of polishing M300 steel. Mathematical Problems
in Engineering, 54-83
 Bagade, S.H., Ikhar, S.R., Vanalkar, A.V. (2014). Design, fabrication and performance
evaluation of polisher machine of mini dal mill. International Journal of Research and General
Science
 Barbuto, A.T. (1993). Automated polishing procedure for the metallographic preparation of
high-temperature superconducting ceramics. Materials Characterization, 30(1): 71-74.
 Qu, X.T., Zhang, H., Zhao, Y.B., Zhang, F.Q. (2018). Dynamic design of grinding and
polishing machine tool for blisk finishing. IOP conference series: Materials Science and
Engineering AMIMA, 1-7.