Effect of high-frequency orbital and vertical oscillations of the laser focus position on the quality of the cut surface in a thick plate by laser beam machining

2015 ◽  
Vol 40 ◽  
pp. 112-123 ◽  
Author(s):  
Yoshihiro Morimoto ◽  
Dongjue He ◽  
Wataru Hijikata ◽  
Tadahiko Shinshi ◽  
Takahiro Nakai ◽  
...  
Keyword(s):  
Laser Beam ◽  
High Frequency ◽  
Thick Plate ◽  
Focus Position ◽  
Laser Beam Machining ◽  
Laser Focus ◽  
Cut Surface

The Laser Focus Position Control System Based on Motion Controller

2014 ◽  
Vol 644-650 ◽  
pp. 636-638
Author(s):  
Yun Li Zhang
Keyword(s):  
Control System ◽  
Laser Cutting ◽  
Position Control ◽  
Tracking System ◽  
Displacement Sensor ◽  
Focus Position ◽  
Motion Controller ◽  
Automatic Tracking ◽  
Laser Focus

Laser cutting focus position automatic tracking system of control precision directly affects the quality of laser cutting processing. There is a low anti-jamming capability, poor quality,poorer openness and poorer dynamic response short comings in the inductive sensor or the capacitive sensor and constitute of the single chip microcomputer control system. This paper introduces a laser focus automatic tracking system based on motion controller, using optical encoder as displacement sensor, use the motion controller of master-slave tracking (electronic gear) function implementation focus position error compensation quickly. Improve the quality of system control, openness, the stability and reliability.

scholarly journals Influence of cutting parameters on the quality of the cut surfaces of steel swith a laser beam

2019 ◽  
Vol 44 (1) ◽  
pp. 21-27
Author(s):  
Dobre Runchev ◽  
Filip Zdraveski ◽  
Irena Ivanova
Keyword(s):  
Laser Beam ◽  
Laser Cutting ◽  
Visual Inspection ◽  
Cutting Speed ◽  
Base Material ◽  
Cutting Parameters ◽  
Thermal Cutting ◽  
Materials Used ◽  
Cut Surface

The main objective of the research covered in this paper is to present results for the quality of surfaces thermally cut with a laser beam. The variety of steel materials used as samples on which laser cutting is performed are the following Č.0146 (1.0330), Č.0147 (1.0333), Č.2131 (1.5024), SS Ferbec CR, HARDOX 450 and HARDOX 550. Thermal cutting is carried out with a CNC controlled Fiber laser BAYKAL type BLS–F–1530. The quality of the cut surface is analyzed based on varying the power of the laser beam, changing cutting speed and the type of additional gas (oxygen, air and nitrogen). By visual inspection, measuring the roughness of the cut surface and measuring the width of the intersection, it is determined the influence of the factors like type of the base material, type of gases, the power of thelaser beam and the cutting speed, in accordance with the standards DIN EN ISO 9013-2002 and the JUS C.T3.022.

Role of the Laser Focus Position in the Laser Beam Cutting of Thin Stainless Steel Sheets

2010 ◽  
Vol 659 ◽  
pp. 209-214
Author(s):  
György Meszlényi ◽  
János Dobránszky ◽  
Zolt Puskás
Keyword(s):  
Stainless Steel ◽  
Laser Beam ◽  
Cutting Speed ◽  
Cutting Edge ◽  
Focus Position ◽  
Aisi 304L ◽  
Steel Sheets ◽  
Laser Focus ◽  
Edge Quality

This paper examines pulsed Nd:YAG laser cutting edge quality of 0,4 mm thin AISI 304L austenitic stainless steel sheets. We analyze the effect of laser beam focal plane distance from the upper plane of the sheet and the effect of cutting speed on the striation of the cutting edge. We obtain the acceptable focus position range from the analysis of percussion drilling. At the evaluation we determine the optimal focus position for the maximal cutting speed.

scholarly journals Rapid Prototyping of Art Sculptural Shapes According to the Sample

2019 ◽  
Vol 44 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Saša Živanović ◽  
Slobodan Tabaković ◽  
Saša Radjelović
Keyword(s):  
Laser Beam ◽  
Fiber Laser ◽  
Laser Cutting ◽  
Visual Inspection ◽  
Cutting Speed ◽  
Base Material ◽  
Thermal Cutting ◽  
Materials Used ◽  
Cut Surface

The main objective of the research covered in this paper is to present results for the quality of surfaces thermally cut with a laser beam. The variety of steel materials used as samples on which laser cutting is performed are the following Č.0146 (1.0330), Č.0147 (1.0333), Č.2131 (1.5024), SS Ferbec CR, HARDOX 450 and HARDOX 550. Thermal cutting is carried out with a CNC controlled Fiber laser BAYKAL type BLS–F–1530. The quality of the cut surface is analyzed based on varying the power of the laser beam, changing cutting speed and the type of additional gas (oxygen, air and nitrogen). By visual inspection, measuring the roughness of the cut surface and measuring the width of the intersection, it is determined the influence of the factors like type of the base material, type of gases, the power of thelaser beam and the cutting speed, in accordance with the standards DIN EN ISO 9013-2002 and the JUS C.T3.022.

Laser Driven Paraffin Microsphere Transportation on a Single Carbon Nanocoil

2013 ◽  
Vol 818 ◽  
pp. 141-144 ◽  
Author(s):  
Yan Ming Sun ◽  
Yu Li Liu ◽  
He Ma ◽  
Lu Jun Pan
Keyword(s):  
Temperature Gradient ◽  
Laser Beam ◽  
Thermal Energy ◽  
Laser Energy ◽  
Infrared Laser ◽  
Mass Transportation ◽  
Focus Position ◽  
Infrared Laser Beam ◽  
Laser Focus

Laser driven mass transportation on a single carbon nanocoil (CNC) has been investigated, by regulating the controlling current and the laser focus position. It is found that a paraffin microsphere on a single CNC can be removed by the irradiation of an infrared laser beam on the CNC body near themicrosphere. This phenomenon is explained by a thermal driven forceresulted by a temperature gradient along the CNC around the irradiation spot wherethe laser energy is transformed into thermal energy.

MoP-40 A MAGLEV LENS DRIVING ACTUATOR FOR HIGH-FREQUENCY AND MULTI-DOF LASER FOCUS POSITIONING IN LASER BEAM CUTTING

2015 ◽  
Vol 2015 (0) ◽  
pp. _MoP-40-1_-_MoP-40-2_
Author(s):  
Tadahiko Shinshi ◽  
Yoshihiro Morimoto ◽  
Dongjue He ◽  
Wataru Hijikata ◽  
Takahiro Nakai ◽  
...  
Keyword(s):  
Laser Beam ◽  
High Frequency ◽  
Laser Focus

Study on Misalignment of Focus Position in Laser Metal Deposition Shaping Processing

2009 ◽  
Vol 16-19 ◽  
pp. 1218-1222
Author(s):  
Feng Jie Tian ◽  
Wei Jun Liu ◽  
Xiao Feng Shang ◽  
Guang Yang
Keyword(s):  
Laser Beam ◽  
Surface Quality ◽  
Metal Deposition ◽  
Thin Wall ◽  
Focus Position ◽  
Laser Metal Deposition ◽  
Single Track ◽  
Random Direction ◽  
Detecting Method

In order to investigate the effect on manufacturing quality of focus position misalignment between laser beam and powder convergence in laser metal deposition shaping (LMDS) processing, several experiments including single-track monolayer, straight thin-wall and ring thin-wall were made. The measurements and analysis on shape, size and surface quality of the experiment parts were carried out. An omnidirectional detecting method to check the misalignment of focus position was brought forward and tested. The results indicate that the misalignment of focus position directly affects the quality of shaping parts and shows the regularity, the detecting method can easily detect the focus position misalignment on random direction and angle and guide the adjustment on them.

Experimental Investigation on the Process of Jet Electrochemical Machining and Guided Laser Beam Machining

2010 ◽  
Vol 458 ◽  
pp. 325-330
Author(s):  
Li Xin Yuan ◽  
Jia Wen Xu ◽  
Jian She Zhao
Keyword(s):  
Laser Beam ◽  
Electrochemical Machining ◽  
Engineering Application ◽  
Recast Layer ◽  
Experimental Results ◽  
Laser Beam Machining ◽  
Metallurgical Defects ◽  
Jet Electrochemical Machining ◽  
Better Than

Laser beam machining is often associated with the metallurgical defects related with spatter, recast layer and heat-affected zone. In order to overcome the defects, this paper presents a process of jet electrochemical machining and guided laser beam machining (JECM-GLBM). On the explain of experimental principle and apparatus, jet electrochemical machining and laser beam machining(JECM-LBM) and JECM-GLBM experiments have been performed on 0.5mm thick 321S20 stainless steel under the same experimental condition respectively. The experimental results show that the entry circularity, repeatability and the surface quality of JECM-GLBM are significantly better than JECM-LBM, and the spatter and the recast layer of hole-wall has been mostly removed in JECM-GLBM. In addition, increasing the IEG leads that the taper and overcut are decreased in JECM-GLBM. By analyzing the experimental results, the best IEG is 10mm, which is unusually beneficial for the design of equipment in engineering application.

Simulation of vibration piercing of pipe blank at press

2020 ◽  
Vol 76 (11) ◽  
pp. 1128-1138
Author(s):  
S. R. Rakhmanov
Keyword(s):  
High Frequency ◽  
Deformation Zone ◽  
Pipe Blank ◽  
Equipment Operation ◽  
Metal Deformation ◽  
Technological Tool ◽  
High Frequency Vibrations ◽  
Pipe Blanks ◽  
Wave Phenomena

In some cases, the processes of piercing or expanding pipe blanks involve the use of high-frequency active vibrations. However, due to insufficient knowledge, these processes are not widely used in the practice of seamless pipes production. In particular, the problems of increasing the efficiency of the processes of piercing or expanding a pipe blank at a piercing press using high-frequency vibrations are being solved without proper research and, as a rule, by experiments. The elaboration of modern technological processes for the production of seamless pipes using high-frequency vibrations is directly related to the choice of rational modes of metal deformation and the prediction resistance indicators of technological tools and the reliability of equipment operation. The creation of a mathematical model of the process of vibrating piercing (expansion) of an axisymmetric pipe blank at a piercing press of a pipe press facility is an actual task. A calculation scheme for the process of piercing a pipe plank has been elaborated. A dependence was obtained characterizing the speed of front of plastic deformation propagation on the speed of penetration of a vibrated axisymmetric mandrel into the pipe workpiece being pierced. The dynamic characteristics of the occurrence of wave phenomena in the metal being pierced under the influence of a vibrated tool have been determined, which significantly complements the previously known ideas about the stress-strain state of the metal in the deformation zone. The deformation fields in the zones of the disturbed region of the deformation zone were established, taking into account the high-frequency vibrations of the technological tool. It has been established that the choice of rational parameters (amplitude-frequency characteristics) of the vibration piercing process of a pipe blank results in significant increase in the efficiency of the process, the durability of the technological tool and the quality of the pierced blanks.

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