This is a presentation for measurement of grinding temperature field using Infra-Red (IR) Imaging system. A pyrometer of optical fibre is used.

1. Measurement of Temperature
Field in Surface Grinding Using
Infra-Red (IR) Imaging System
PRESENTED BY - SAYAN MALLICK
ROLL NO - 16ME61R14
M.TECH (1st YEAR)
MANUFACTURING SCIENCE
IIT KHARAGPUR

2. CONTENTS
• INTRODUCTION
• OBJECTIVE
• Process description
• Experimental Method
• Results & Discussion
• Conclusion
• References

3. OBJECTIVE
• To measure grinding temperature with an
effective method of Infra-Red radiation
using optical fiber.

4. INTRODUCTION
• large amount of energy is expended for
material removal in grinding.
• Heat is generated resulting various faults
in machined surface

5. CONTINUED
• Grinding Burn
• A better understanding of thermal damage
is likely to be gained by a study of the
workpiece temperature field.
• The heart of the measurement technique
is a Charge-Coupled Device (CCD) based,
Infra-Red (IR) imaging system and

6. PROCESS DESCRIPTION
Pyrometer
 3 kinds of optical fiber is used.
 Quartz fiber, fluoride fiber and
chalcogenide fiber.

7. Characteristics of optical fiber

8. Spectral transmission loss of optical fibers

9. • The upper limit of the wavelength of light
transmission :-
Chalcogenide - 6 μm
Fluoride – 4 μm
Quartz – 2 μm
• The diameter of the chalcogenide fiber is
approximately 320 μm, which is about 6

10. Calibration
• Emissivity of material depends on many
factors.
• Such as Temperature, Surface finish and
wave length of radiation.
• Therefore the calibration curve of the three
versions of the pyrometer were obtained by

11. EXPERIMENTAL SETUP

12. Pyrometer

13. Schematic diagram of Experiment

14. Grinding Conditions

15. RESULTS

18. Temperature Distribution in workpiece
• The highest temperature is with Si N ,
whose grinding power is largest, where the
surface temperature is estimated to be
800°C.
• At 20 μm depth below the surface, the
temperature is approximately 400°C
43

19. • In the case of SiC and Al203 the
temperatures at 40 μm depth are only
100°C.
• The temperature gradients are smaller
than for Si3N4.
• the main reasons for this is that the
grinding powers are smaller than in the

20. CONCLUSION
• The grinding temperature of ceramics is
measured by an IRP with an optical fiber,
either a fluoride fiber or a chalcogenide fiber.
Si3N4, SiC, and Al203 are used as work
materials.
• For Si3N4 and Al203, the signal trace versus
time is observed as a curve with a great
many peaks, but for SiC there are no peaks.

21. • This phenomenon arises from the optical
properties of ceramics.
• The grinding temperature is highest in Si3N4,
whose grinding power is the largest for these
three materials.
•
• The temperature distribution in the surface
layer of ceramics was greatly different from

22. REFERECNES
• 1 Littmann, W. E, and Wulff, J., 1955, "The Influence of the Grinding
• Process on the Structure of Hardened Steel," Trans. ASM, Vol. 47, pp. 692-
• 714.
• 2 Takazawa, K., 1966, "Effects of Grinding Variables on the Surface Structure
• of Hardened Steel," Bull. Japan Soc. of Precision Engineering, Vol. 2,
• No. 1, Apr., pp. 14-19.
• ,3 Ueda, T., Hosokawa, A., and Yamamoto, A., 1985, "Studies on Temperature
• of Abrasive Grains in Grinding-Application of Infrared Radiation Pyrometer,"
• ASME JOURNAL OF ENGINEERING FOR INDUSTRY, Vol. 107, No. 2,
• pp. 127-133.
• 4 Ueda, T., Hosokawa, A., and Yamamoto, A., 1986, "Measurement of
• Grinding Temperature Using Infrared Radiation Pyrometer with Optical Fiber,"
• ASME JOURNAL OF ENGINEERING FOR INDUSTRY, Vol. 108, No. 4, pp. 247-251.
• 5 Yamagishi, T., 1989, "Chalcogenide Glass Fiber For Infrared Transmission,"
• New Glass., Vol. 3, No. 4, pp. 10-12.
• 6 Siegel, R., and Howell, J. R., 1972, Thermal Radiation Heat Transfer,
• McGraw-Hill Kogakushi, Ltd., pp. 42-78.
• 7 Touloukian, Y. S., and Ho, C. Y., 1972, "Thermophysical Properties of
• Matter," Plenum, 8

23. THANK YOU