Ultrasonic measurement of tie-bar stress for die-casting machine

Zhuo, Chaojie; Zhao, Peng; Ji, Kaipeng; Xie, Jun; Ye, Sheng; Cheng, Peng; Fu, Jianzhong

doi:10.1007/s11465-021-0663-1

Cited by 5 publications

(4 citation statements)

References 29 publications

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“…Utilizing two transducers to transmit sound waves through the casting from opposing sides is another method known as through-transmission testing. This technique can find flaws such as voids or fissures that go all the way through the casting (40). Ultrasonic testing requires careful preparation and safety precautions to ensure accurate results and protect personnel from exposure to high-frequency sound waves.…”

Section: Ultrasonic Testingmentioning

confidence: 99%

Investigating the causes and remedies for porosity defects in the casting process: A review

Sahoo¹,

Goswami²

2023

BIJE

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The casting process is a crucial manufacturing method utilized in numerous sectors to create intricate components and forms. However, there are a number of underlying causes of casting flaws that can result in subpar quality, higher costs, and decreased productivity. This review seeks to give a general overview of casting process flaws, their causes, and possible fixes. The evaluation will go over the various possible flaws, including porosity, shrinkage, and surface abnormalities, as well as their underlying causes, which include design, material, and process characteristics. Furthermore, the review will focus on various remedial measures that can be taken to overcome these defects and improve casting quality, such as changes in design, material selection, and process optimization. This review will be useful for researchers and practitioners in the casting industry who are interested in improving their understanding of casting defects and developing effective remedial measures to enhance product quality and efficiency.

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Section: Ultrasonic Testingmentioning

confidence: 99%

Investigating the causes and remedies for porosity defects in the casting process: A review

Sahoo¹,

Goswami²

2023

BIJE

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“…In our previous work [28], an ultrasonic measurement method of tie-bar stress for molding machine was proposed based on the acoustoelastic theory. The mathematical model was established between the UTD and the stress.…”

Section: Applicability Experimentsmentioning

confidence: 99%

Non-intrusive ultrasonic measurement of tie-bar stress for molding equipment

Zhuo¹,

Ji²,

Xie³

et al. 2022

Meas. Sci. Technol.

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For molding equipment, the accurate measurement of tie-bar stress helps improve product quality and prolong the lifespan of the machine. In our previous work, the mathematical model between the ultrasonic time difference (UTD) and the tie-bar stress was established, and this model was shown to have high accuracy with the maximum of difference square being only 1.5678 (MPa)2. Nevertheless, when calculating the ultrasonic time difference using the cross-correlation function (CCF) method, it is necessary to manually divide the position of the echoes. This makes it impossible to automate the stress measurement and it is incompetent when dealing with massive data. In this paper, a non-intrusive (N-I) ultrasonic measurement method for tie-bar stress based on the minimum entropy blind deconvolution is firstly proposed. The results of simulation and verification experiments show that the proposed method has high precision, and the maximum relative error is only 2.4392%. Hence this method has been successfully applied in the tie-bar stress measurement in molding equipment. Compared with the CCF method, the accuracy is improved and the maximum relative error is reduced from 3.67% to 1.68% when the clamping force is small. In summary, the proposed method is comparable to the CCF method in accuracy, and has a higher resolution during echos disturbance. Moreover, this approach does not require human intervention and is helpful to realize the automation of the tie-bar stress measurement for the molding equipment.

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“…Ultrasonic focusing technology has a broad range of applications in industrial nondestructive testing [1][2][3][4], structural health monitoring [5,6], and medical ultrasound [7][8][9]. In recent years, high-quality research results in cutting-edge fields such as photo-acoustic imaging [10], ultrasonic neuromodulation [11], ultrahigh-frequency ultrasound [12], wireless power transfer [13,14], and acoustic tweezers [15] are reported continuously.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an Active Focusing Planar Piezoelectric Ultrasonic Transducer

Wu,

You,

Zhang

et al. 2024

Sensors

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Ultrasonic focusing transducers have broad prospects in advanced ultrasonic non-destructive testing fields. However, conventional focusing methods that use acoustic concave lenses can disrupt the acoustic impedance matching condition, thereby adversely affecting the sensitivity of the transducers. In this paper, an active focusing planar ultrasonic transducer is designed and presented to achieve a focusing effect with a higher sensitivity. An electrode pattern consisting of multiple concentric rings is designed, which is inspired by the structure of Fresnel Zone Plates (FZP). The structural parameters are optimized using finite element simulation methods. A prototype of the transducer is manufactured with electrode patterns made of conductive silver paste using silk screen-printing technology. Conventional focusing transducers using an acoustic lens and an FZP baffle are also manufactured, and their focusing performances are comparatively tested. The experimental results show that our novel transducer has a focal length of 16 mm and a center frequency of 1.16 MHz, and that the sensitivity is improved by 23.3% compared with the conventional focusing transducers. This research provides a new approach for the design of focusing transducers.

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Ultrasonic measurement of tie-bar stress for die-casting machine

Cited by 5 publications

References 29 publications

Investigating the causes and remedies for porosity defects in the casting process: A review

Investigating the causes and remedies for porosity defects in the casting process: A review

Non-intrusive ultrasonic measurement of tie-bar stress for molding equipment

Investigation of an Active Focusing Planar Piezoelectric Ultrasonic Transducer

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