Optimization of weld strength for laser welding of steel to PMMA using Taguchi design method

Huang, Yudong; Gao, Xiangdong; Ma, Bo; Liu, Guiqian; Zhang, Nanfeng; Zhang, Yanxi; You, Deyong

doi:10.1016/j.optlastec.2020.106726

Cited by 45 publications

(19 citation statements)

References 39 publications

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“…5. Orthogonal array is widely used in multiple factor optimization experiments [27][28][29] . In our orthogonal experiment, factors are movement of 18 joints.…”

Section: 1robot Joint Motion Samplesmentioning

confidence: 99%

Dynamic Characteristics Analysis of Two-Beam Laser Welding Robot for Fulselage Panels

Zeng

Liu

et al. 2021

Preprint

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Industrial robotics is becoming increasingly popular in the field of manufacturing automation. Two-beam laser welding robot which is a proprietary industrial robot of great importance to improve the welding quality of stringer-skin T-shape structure. In the process of two-beam laser cooperative welding, the robot constantly adjusts its own posture, and the position and posture of each joint would change simultaneously, which leads to the change of the natural frequency, and other dynamic characteristics of the welding robot. Based on the finite element method (FEM), the modal analysis of the robot joints in the range of motion ability and the range of motion in the process of two beam laser welding are studied, which can provide the basis for the design and accurate control of the robot with high degree of freedom (DOF). The dynamic characteristics of the whole robot in different positions and attitudes is carried out, which includes two parts, one is importance ranking of 18 joints of the robot through orthogonal test according to the range of each joint movement. The other is obtaining a plurality of time points in one welding cycle, and performing a modal analysis of the robot at each time point on the basis of the robot joints in the range of motion during the process of two-beam laser welding, the optimal number of time nodes are attained and the test workload could be reduced. The approach described herein provides a theoretical basis for robotics design and control optimization.

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“…5. Orthogonal array is widely used in multiple factor optimization experiments [27][28][29] . In our orthogonal experiment, factors are movement of 18 joints.…”

Section: 1robot Joint Motion Samplesmentioning

confidence: 99%

Dynamic Characteristics Analysis of Two-Beam Laser Welding Robot for Fulselage Panels

Zeng

Liu

et al. 2021

Preprint

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“…With the development of science and technology, welding technology has been applied to various fields, such as the automobile industry, machinery manufacturing, the shipbuilding industry, aerospace, biomedicine, powder metallurgy, the microelectronics industry, energy generation, and other fields [1][2][3]. In the welding process, due to the influence of the weldment surface condition, joint gap [4], welding power [5], welding speed [6], and other factors, welded products are prone to welding defects, which directly affect the products' quality [7][8][9]. Spot welding is used to weld individual points on the contact surface of the weldment at the joint.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Optical Imaging of Arbitrarily Distributed Defects in Welds under Combined Magnetic Field

Gao

Tian

et al. 2022

Metals

Self Cite

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Using the traditional magneto-optical detection methods, micro-weld defects parallel with the magnetic field direction may be overlooked. In order to overcome this, a non-destructive testing method based on magneto-optical imaging under a vertical combined magnetic field (VCMF) is proposed. To demonstrate this, the experimental results of the magneto-optical imaging of weld defects excited by a vertical combined magnetic field (VCMF) or parallel combined magnetic field (PCMF) are compared with those of traditional magnetic fields (constant magnetic field (CMF), alternating magnetic field (AMF), and rotating magnetic field (RMF)). It is found that the magneto-optical imaging under a VCMF can accurately detect weld defects of any shape and distribution. In addition, the center difference method is used to eliminate the influence of noise on the defect contour extraction of magneto-optical images, and the active contour of weld defects in the magneto-optical images is extracted. The results show that many noises can be identifiedby the robustness of the level set method, operating in low-pass filtering, so that much information that is usually lost can be retained.

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“…The peak power, pulse duration, pulse repetition rate, scanning speed, and pulse shape were reported to significantly affect the joint strength, joint width, and joint quality and appearance. Recently, Huang et al [ 23 ] also addressed the dissimilar joining of 304 stainless steel to PMMA with an Nd:YAG pulsed laser, optimising the weld strength based on the process parameters. It was concluded that the laser pulse duration has the maximum effect on weld strength, followed by laser peak power and welding speed.…”

Section: Introductionmentioning

confidence: 99%

Laser Direct Joining of Steel to Polymethylmethacrylate: The Influence of Process Parameters and Surface Mechanical Pre-Treatment on the Joint Strength and Quality

et al. 2022

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The search for lightweight structures increases the demand for non-metallic materials, such as polymers, composites, and hybrid structures. This work presents the dissimilar joining through direct laser joining between polymethylmethacrylate (PMMA) and S235 galvanised steel using a pulsed Nd:YAG laser. The main goal is to determine the influence of processing parameters on joint strength and quality. In addition, the impact of surface conditions on the joint quality was also analysed. Overall, the optimum ranges of process parameters were found, and some are worth highlighting, such as the laser beam diameter and pulse duration, which significantly influenced the joint strength. Failure of the welded samples occurred in PMMA component, demonstrating good joint efficiency. Additionally, a maximum increase of 5.1% of the tensile shear strength was achieved thanks to the mechanical pre-treatment. It is possible to conclude that the joining between PMMA and the S235 galvanised steel can be performed by optimising the process parameters. Additionally, it can be enhanced through surface pre-treatments by exploring the mechanical interlock between both materials.

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Optimization of weld strength for laser welding of steel to PMMA using Taguchi design method

Cited by 45 publications

References 39 publications

Dynamic Characteristics Analysis of Two-Beam Laser Welding Robot for Fulselage Panels

Dynamic Characteristics Analysis of Two-Beam Laser Welding Robot for Fulselage Panels

Magneto-Optical Imaging of Arbitrarily Distributed Defects in Welds under Combined Magnetic Field

Laser Direct Joining of Steel to Polymethylmethacrylate: The Influence of Process Parameters and Surface Mechanical Pre-Treatment on the Joint Strength and Quality

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