Grinding of Cemented Carbide Using a Vitrified Diamond Pin and Lubricated Liquid Carbon Dioxide
Artikel i vetenskaplig tidskrift, 2023

Despite extensive research on grinding of cemented carbide, few studies have examined abrasive machining of this material using small-diameter super abrasive tools (also known as grinding pins/points), especially with respect to varying cooling-lubrication methods. This study therefore focuses on a comparative experimental investigation of three such methods - dry, emulsion, and lubricated liquid carbon dioxide (LCO2-MQL). The performance of these methods and the resulting grindability are examined in terms of grinding forces, force ratios, specific energy, and through the analysis of wheel loading. The results show that LCO2-MQL grinding has lower grinding forces (normal forces – 8 % to 145 % lower than dry grinding, and 18 % to 33 % lower than emulsion grinding and tangential forces – 4 % to 66 % lower than dry grinding and 28 % to 78 % lower than emulsion grinding) and specific energy 24 % to 51 % lower compared to dry grinding and 64 % to 69 % lower than emulsion grinding, indicating its potential for efficient material removal. However, a challenge with high wheel loading was observed with LCO2-MQL, likely due to the lack of oxygen in the CO2 grinding atmosphere. Despite this issue, the LCO2-MQL method shows potential for efficient operations, especially at higher aggressiveness values where the lowest specific energies were achieved. These results provide new insights into various aspects of cooling-lubrication methods in the pin grinding of cemented carbides.

carbon dioxide

grinding

diamond

cooling-lubrication

cemented carbides

Författare

Deepa Kareepadath Santhosh

Univerza V Ljubljani

Franci Pusavec

Univerza V Ljubljani

Peter Krajnik

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Univerza V Ljubljani

Strojniski Vestnik/Journal of Mechanical Engineering

0039-2480 (ISSN)

Vol. 69 11-12 435-443

Transitioning to a waste-free production – international cryogenic+MQL machining activity

The European Institute of Innovation and Technology (EIT) (21193), 2021-01-01 -- 2021-12-31.

Ämneskategorier

Tribologi

Bearbetnings-, yt- och fogningsteknik

Metallurgi och metalliska material

DOI

10.5545/sv-jme.2023.658

Mer information

Senast uppdaterat

2023-12-21