Monitoring of Processing Conditions of an Ultrasonic Vibration-Assisted Ball-Burnishing Process

Sensors

卷:20

Ramón Jerez-Mesa¹  Jordi Llumಠ Aida Estevez-Urra³  JoseAntonio Travieso-Rodriguez⁴ 

[1] Department of Engineering, Universitat de Vic, Universitat Central de Catalunya, C. de la Laura 13, 08500 Vic, Spain;

[2] Department of Materials Engineering, Universitat Politècnica de Catalunya, Barcelona 08019, Spain;

[3] Department of Mechanical Engineering and Manufacturing, Universidad de Sevilla, 41092 Sevilla, Spain;

[4] Department of Mechanical Engineering, Universitat Politècnica de Catalunya, Barcelona 08019, Spain;

关键词: accelerometer;    process monitoring;    natural frequencies;    ball burnishing;    ultrasonic;    piezoelectric;   

DOI  :  10.3390/s20092562

来源: DOAJ

【 摘 要 】

Although numerous references present the beneficial effects on surface integrity of ultrasonic vibration-assisted ball burnishing (UVABB), nothing has been reported about the dynamic behavior of the UVABB tool, workpiece, and machine triad during the process. In this paper, a dynamic monitorization through a set of 5 accelerometers is tested to analyze the interactions between the tool–workpiece–machine mechanical assembly. A UVABB tool attached to a milling machine and equipped with a piezoelectric stack that is able to assist the process with a 40-kHz vibration is tested on a milled C45 steel surface. First, the natural frequencies of the mechanical system are obtained through hammer impact tests. Then, the vibratory signals transmitted during the execution of the process are monitored and compared to those: two feed velocities and two burnishing preloads, all with and without vibration-assistance. Results show that the proposed accelerometer set is valid to assess the behavior of a UVABB process. The system’s natural frequencies are not varied by vibration-assistance and are not excited when the piezoelectric is functioning. It is confirmed that UVABB is safe for the machine and the tool, and there is no unexpected excited frequencies due to the piezoelectric excitation.

【 授权许可】

Unknown