Development of Femto-Second Pulsed Laser Machining System for Low Friction Metal Part

Approximate, quasi-one-dimensional conduction models have been developed to predict the changing shape of holes, single grooves, or overlapping grooves carved by ablation into a thick solid that is irradiated by a moving laser source. For CW or pulsed laser operation a simple integral method is presented, which predicts shapes and removal rates with an accuracy of a few percent, while requiring one order of magnitude less CPU time than a three-dimensional, numerical solution. For pulsed operation a “full-pulse” model is presented, computing the erosion from an entire pulse in a single step, and reducing computer time by another order of magnitude.

Download Full-text

On the micro-modelling of surface roughness in pulsed laser machining

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1037/1/012007 ◽

2021 ◽

Vol 1037 (1) ◽

pp. 012007

Author(s):

E Kaselouris ◽

Y Orphanos ◽

K Kosma ◽

A Skoulakis ◽

I Fitilis ◽

...

Keyword(s):

Surface Roughness ◽

Pulsed Laser ◽

Laser Machining

Download Full-text

Study on Ultrasonic-Assisted Laser Machining of Si3N4

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.693.914 ◽

2016 ◽

Vol 693 ◽

pp. 914-921 ◽

Cited By ~ 1

Author(s):

Yan Sheng Yao ◽

Yuan Yuan Wang ◽

Xiu Yu Li ◽

Xue Hui Chen ◽

Gen Fu Yuan ◽

...

Keyword(s):

Water Flow ◽

Flow System ◽

Pulsed Laser ◽

Laser Machining ◽

Width Ratio ◽

Measuring Instrument ◽

Two Dimensional Image ◽

Machining Quality ◽

Ultrasonic Assisted ◽

Microstructure Morphology

Si3N4 is difficult to be machined due to its hard and brittle nature. In order to improve its machining quality, a new method of ultrasonic-assisted laser machining is proposed. The machining device is established including Nd: YAG pulsed laser, ultrasonic vibration stage and water flow system. Etching experiments of laser machining with and without sample vibration in anhydrous conditions and in water conditions are studied respectively. A VM-3030E two-dimensional image measuring instrument is applied to detect shape and measure dimension of the sample. Microstructure morphology of the sample is observed by a JSM-7500F scanning electron microscope. Experimental results show that there are fewer slags on inner surfaces of V-shaped grooves when laser machining with water flow. The surface quality and depth-to-width ratio of grooves machined by laser with vibration on sample are improved significantly in comparison with those without vibration. The depth-to-width ratio of groove machined by laser with 90.1W vibration power is near twice than that without vibration.

Download Full-text

Design of Micromachining System Based on Nanosecond Pulsed Laser

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.645-646.1049 ◽

2015 ◽

Vol 645-646 ◽

pp. 1049-1053

Author(s):

Dong Xu ◽

Yao Yao ◽

Xing Fu ◽

Chao Wang

Keyword(s):

Pulsed Laser ◽

Movement Pattern ◽

Circuit Board ◽

Nanosecond Laser ◽

Motion System ◽

Nanosecond Pulsed Laser ◽

Aerospace Technology ◽

Machining System ◽

Automation Control ◽

Point Line

In recent years, pulsed laser processing technology is widely used in MEMS device manufacturing, aerospace technology, precision instrument manufacturing and circuit board processing. According to the characteristics of nanosecond laser, this paper designs a novel nanosecond pulsed laser micromachining system with PMAC card as its core unit. The system can achieve automation control of laser parameters and movement pattern of motion system by software, which can easily realize automatic processing of point, line, and plane structure in micron scale. In this paper, several groups of experiments are taken to test the reliability and accuracy of the machining system and find the group to obtain the best processing result.

Download Full-text