Mechanism Study of Ultrasonic Vibration-Assisted Microgroove Forming of Precise Hot-Pressed Optical Glass

Microgroove structures with helical pitches in a wavelength level are increasingly required optical areas. However, conventional manufacturing techniques generate relatively high stresses during pressing, resulting poor precision when forming microgrooves. This paper reports on the mechanism of ultrasonic vibration-assisted microgroove precise hot-pressed glass. A finite element (FE) thermocompression model viscoelastic material was developed and entire process numerically simulated using coupled thermal-structural analysis. The analysis several parameters carried out orthogonal experiments, from which optimum combination selected. glass thermoforming is also assisted by vibration. thermal mechanical effects vibration improved flow optimized results. average maximum stress only 3.04 × 10−3 Mpa, while hot-pressing stage without ultrasound 1.648 Mpa. results showed that material-forming significantly reduced.