Structure design and experimental study on ultrasonic vibration–assisted induction brazing cubic boron nitride abrasive tools

Autor: Kaida Cai, Biao Zhao, Bangfu Wu, Wenfeng Ding, Yanjun Zhao, Jianhui Zhu, Wenyuan Si
Rok vydání: 2022
Předmět:
Zdroj: The International Journal of Advanced Manufacturing Technology. 123:943-955
ISSN: 1433-3015
0268-3768
DOI: 10.1007/s00170-022-10231-1
Popis: Brazed abrasive tool has been widely used in high-precision machining of difficult-to-cut materials to improve the machining efficiency and quality. However, the severe wear and associated short service life during machining processes have to be faced for conventional induction brazed (CIB) abrasive tools owing to its weak bonding strength between abrasive grains and metal-bonded materials. In this case, a novel ultrasonic vibration-assisted induction brazing (UVAIB) device was developed to improve the abrasive bonding strength. Here, the frequency equation of the UVAIB device was derived using recursive methods, and then the geometric designation parameters were optimized with the finite element simulating method. In addition, the performance of UVAIB device was tested in terms of the impedance and amplitude. Subsequently, the comparative experiment trials were performed with the brazed abrasive tools under the CIB and UVAIB method. Results show that the ultrasonic energy loss of UVAIB device could be reduced, and then the amplification value and vibration uniformity could reach 8 and 92%, respectively. In addition, for CIB, there are a large number of pores and macro-cracks on the joints. However, the internal pores inside the metallic matrix of UVAIB were reduced, and only fewer and smaller micro-cracks could be found. Furthermore, the intergranular fracture of abrasive grains could be observed for CIB abrasive tools owing to the weak bonding interface caused by the existence of numerous micropores, whereas the grain transgranular fracture appeared once adopting the ultrasonic vibrating method.
Databáze: OpenAIRE
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