The Effect of the Abrasive and Filler on Resin Bonded CBN Specimens for Grinding Steel
| Autor: | Hung-Jui Chang, 張紘睿 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 Grinding wheel comprises abrasive、bond and structure. In this study, it was used in the producing process of resin-bonded CBN specimen because they have the same ingredients. Their different geometric shapes, however, make it possible to reduce the experimental cost and the producing time and to observe the surface of microstructure of CBN specimens. In the past, grind wheel’s microstructure was observed by the fragment after grinding. Which failed to provide a comprehensive observation about the variation on bond and abrasive. To solve the above-mentioned problem, a carrier is modified to place in scanning electric microscope (SEM) for observation. Then, a holder which could be locked to the grinder spindle and allow the carriers to attach to it for grinding process is designed. Such equipment helps to observe the microstructure of CBN specimens after and before grinding. In this study, the workpiece is DC53 steel which undergoes thermal treatment to HRC 60～61. And the resin-bonded CBN specimens containing different amount of carbon black (0, 1, 5) wt% and Cu (0, 5) wt% are used, along with two species of abrasive, the CBN abrasive BBN-4 and the BBN-4-60NS which is coating Nickel on BBN-4. It is found out that the CBN specimen has lower abrasion when it contains 1wt% carbon black filler, and the CBN specimen contains 5wt% carbon black filler makes the best surface roughness of DC53. And due to the lubricating of Cu, the CBN specimen’s abrasion is decreased by Cu. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|