Effects of laser parameters on machining precision and quality of wave-permeable materials

2022 ◽  
Vol 34 (1) ◽  
pp. 012001
Author(s):  
Lin Zhang ◽  
Zhen Yang ◽  
Zheng Fang ◽  
Jian Cheng
Keyword(s):  
Machining Precision ◽  
Laser Parameters

Process Analysis of Oblique Gibs

2014 ◽  
Vol 496-500 ◽  
pp. 808-811
Author(s):  
Xin Ping Liu
Keyword(s):  
Process Analysis ◽  
Work Piece ◽  
Quality Of Work ◽  
Machining Precision ◽  
Structure Feature

Through analyzing the structure feature of long oblique strip and requirement of machining precision, We introduce a new means of planing to ensure the quality of work-piece. By studying process feature of long oblique strip , Give the method of designing clamping apparatus for planing.

Femtosecond Laser Micromachining of Periodical Structures in Si

2004 ◽  
Vol 850 ◽  
Author(s):  
Mohamed El-Bandrawy ◽  
Mool C. Gupta
Keyword(s):  
Laser Pulses ◽  
Light Polarization ◽  
Objective Lens ◽  
Force Microscopy ◽  
Laser Parameters ◽  
Femtosecond Laser Micromachining ◽  
Atomic Force ◽  
Fs Laser ◽  
Polarization Orientation

ABSTRACTA frequency doubled femtosecond Ti: sapphire laser at a wavelength of 400 nm, a pulse width of 160 fs, and a repetition rate of 1 kHz was used with a computer controlled galvo head to write periodical structures in Si <100>. Laser pulses of ∼130 nJ were focused using an objective lens of 0.65 NA. Laser parameters were optimized for efficient submicron ablation, yielding 700 nm wide by 600 nm deep lines. 1-D and 2-D periodical structures of 5 and 5x5 micron periods, respectively, were fabricated and examined using optical and atomic force microscopy. The quality of the 1-D and 2-D structures was highly depended on the light polarization orientation with respect to micromachining direction. With optimized fs laser parameters, high quality 1-D and 2-D periodical structures were obtained, which would have applications in optical devices.

Influence of laser parameters and Ti content on the surface morphology of L-PBF fabricated Titania

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abid Ullah ◽  
HengAn Wu ◽  
Asif Ur Rehman ◽  
YinBo Zhu ◽  
Tingting Liu ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Laser Beam ◽  
Surface Quality ◽  
Selective Oxidation ◽  
Laser Power ◽  
Scanning Speed ◽  
Content Type ◽  
Powder Bed ◽  
Laser Parameters

Purpose The purpose of this paper is to eliminate Part defects and enrich additive manufacturing of ceramics. Laser powder bed fusion (L-PBF) experiments were carried to investigate the effects of laser parameters and selective oxidation of Titanium (mixed with TiO2) on the microstructure, surface quality and melting state of Titania. The causes of several L-PBF parts defects were thoroughly analyzed. Design/methodology/approach Laser power and scanning speed were varied within a specific range (50–125 W and 170–200 mm/s, respectively). Furthermore, varying loads of Ti (1%, 3%, 5% and 15%) were mixed with TiO2, which was selectively oxidized with laser beam in the presence of oxygen environment. Findings Part defects such as cracks, pores and uneven grains growth were widely reduced in TiO2 L-PBF specimens. Increasing the laser power and decreasing the scanning speed shown significant improvements in the surface morphology of TiO2 ceramics. The amount of Ti material was fully melted and simultaneously changed into TiO2 by the application of the laser beam. The selective oxidation of Ti material also improved the melting condition, microstructure and surface quality of the specimens. Originality/value TiO2 ceramic specimens were produced through L-PBF process. Increasing the laser power and decreasing the scanning speed is an effective way to sufficiently melt the powders and reduce parts defects. Selective oxidation of Ti by a high power laser beam approach was used to improve the manufacturability of TiO2 specimens.

Influence of laser parameters on quality of microholes and process efficiency

2014 ◽  
Author(s):  
A. Feuer ◽  
C. Kunz ◽  
M. Kraus ◽  
V. Onuseit ◽  
R. Weber ◽  
...  
Keyword(s):  
Process Efficiency ◽  
Laser Parameters

The Analysis and Optimization of Machining Precision Based on Electromechanical Matching in High-Speed Machine Tools

2016 ◽  
Vol 836-837 ◽  
pp. 584-591
Author(s):  
Xiao Jun Yang ◽  
Cheng Fang Ma ◽  
Yan Li ◽  
Dun Lv ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Mechanical System ◽  
Surface Quality ◽  
Machine Tools ◽  
High Speed ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Feed System ◽  
Servo Drive ◽  
Machining Precision

With the development of the high-speed and high-precision CNC machine tools, the interaction between mechanical system and servo drive torque in the feed system becomes more and more serious which affects the surface quality of the workpiece. In this paper, taking a small-sized vertical milling center as the research object, the characteristics of servo torque and mechanical system are analyzed, respectively. Then the influence of electromechanical matching on the tracking fluctuation of the feed system is discussed. Furthermore, aiming at the surface roughness of the workpiece, the influence of the interaction between servo torque and mechanical system on the surface quality of the workpiece is analyzed under different milling ways. Finally, a large number of experiments are carried out to verify the analysis above. At last, the optimization methods of machining precision based on electromechanical matching are put forward. It can be found that in the high-speed machining, the servo torque has lots of harmonics which act on the mechanical system with kinds of modals, leading to the vibration. The surface quality of the workpiece will be deteriorated rapidly when the mode of vibration is consistent with the sensitive direction of machining error. The surface quality of the workpiece can be significantly improved through optimizing the feed velocity and the processing method and realizing the electromechanical matching.

scholarly journals DETERMINATION PATH OF MOVEMENT CENTER OF THE RING DURING CENTERLESS MACHINING

2017 ◽  
Vol 2 (3) ◽  
pp. 107-114
Author(s):  
Дуганов ◽  
Vladimir Duganov ◽  
Сумской ◽  
Aleksandr Sumskoy
Keyword(s):  
Elastic Deformation ◽  
Machining Precision ◽  
Axis Of Rotation ◽  
Functional Surfaces ◽  
The Given

In the given work, present the study of factors depending on elastic deformation of the products and the shift of its axis of rotation in the space, on the accuracy of centerless processing of large products. It allows increasing the quality of of support assemblies of large rotating devices, by enhancing machining precision of the functional surfaces. What becomes very important during mounting and of the repairs machine by portable modules in the mining and construction industries.

scholarly journals Laser Parameter Study on Cutting Metal using CO2 Laser

2020 ◽  
Author(s):  
Dongkyoung Lee
Keyword(s):  
High Precision ◽  
Laser Cutting ◽  
Continuous Wave ◽  
Cutting Speed ◽  
Process Quality ◽  
High Tech ◽  
Parameter Study ◽  
Processing Technologies ◽  
Laser Parameters

Abstract This experimental study investigated for the effect of laser parameters on machining of the SS41 and SUS304. These materials play an importance role in engineering aspect. They are widely used in high-tech industries such as aerospace, automotive, and semiconductor. Due to the development of technology and high-tech industrialization, the various processing technologies requiring high precision are being developed. However, the conventional cutting process is difficult to meet high precision processing. Therefore, to achieve high precision processing of the SS41 and SUS304, laser manufacturing has been applied. The experiment investigates the process quality of laser cutting for SS41 and SUS304, with the usage of a continuous wave CO2 laser cutting system. The experimental variables are set to the laser cutting speed, laser power, and different used materials. The results are significantly affected by the laser parameters. As the results, the process quality of the laser cutting has been observed by measuring the top and bottom kerf widths, as well as the size of the melting zone and HAZ according to Eline. In addition, the evaluation of the laser processing parameters is significantly important to achieve optimal cutting quality. Therefore, we observed the correlation between the laser parameters and cutting quality. These were evaluated by analysis of variance (ANOVA) and multiple regression analysis.

Study of Affecting Parameters in Laser Hole Drilling of Sheet Metals

1987 ◽  
Vol 109 (4) ◽  
pp. 282-287 ◽  
Author(s):  
Bekir Sami Yilbas
Keyword(s):  
Physical Properties ◽  
Laser Drilling ◽  
Hole Drilling ◽  
Main Process ◽  
Workpiece Material ◽  
Practical Applications ◽  
Laser Parameters ◽  
Four Blocks ◽  
Four Levels

In practical applications of laser drilling the quality of the drilled hole is the critical factor, and recently methods of studying the influence on quality of the main process variables have been developed, which seek to improve quality rather than explain the drilling mechanism. Hole quality can be judged by: internal form and taper and related geometrical features, and the extent of heat affected materials. The optimum performance in laser drilling depends very much upon the proper selection of laser parameters as well as the physical properties of the workpiece material. With so many variables, and incomplete knowledge of the relationships between them, statistical methods are needed to design experiments and analyze the results. In the present work five factors at four levels were considered. Four factors are given quantative; one, the material specification, is qualitative. The result is that the design has four blocks indentified with materials each of which can be treated as a complete factorial design. However, the materials can be described quantitatively by their physical properties, so the results were correlated with the groups generated by the dimensional analysis. It is observed that main effects of laser parameters as well as their interactions, have significant effects on all features of hole geometry. Drilling medium pressure was found to be very effective factor, since its interactions with the other parameters in any order are significant.

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