The Experts below are selected from a list of 6795 Experts worldwide ranked by ideXlab platform

Hu Yanchao - One of the best experts on this subject based on the ideXlab platform.

  • method for quickly designing mechanical products based on virtual Instruments and reverse engineering
    2013
    Co-Authors: Zhao Wenli, Lin Hui, Meng Qinghua, Fan Zhihua, Tian Yanping, Cheng Qiong, Hu Yanchao
    Abstract:

    The invention relates to a method for quickly designing mechanical products based on virtual Instruments and reverse engineering. The method comprises the following steps of: acquiring the point cloud data through a prototype product model at first, obtaining a prototype product curved surface model through utilizing an imageware software according to the obtained point cloud data, utilizing CATIA software to form a prototype product solid model of the curved surface model, using a parametrization design to obtain a new product solid model, analyzing and computing the new model through utilizing ANSYS software so as to obtain a new product model which satisfies requirements, and finally, storing the model into a database and quickly forming through a quick forming machine. The method consists of a prototype product model data acquiring part, a data processing, analyzing and managing part with a computation and analysis software and a quick forming part. The data acquiring part is an Optical Measuring Instrument, data measurement and acquisition can be realized through scanning, and the point cloud data of the model can be obtained.

Zhao Wenli - One of the best experts on this subject based on the ideXlab platform.

  • method for quickly designing mechanical products based on virtual Instruments and reverse engineering
    2013
    Co-Authors: Zhao Wenli, Lin Hui, Meng Qinghua, Fan Zhihua, Tian Yanping, Cheng Qiong, Hu Yanchao
    Abstract:

    The invention relates to a method for quickly designing mechanical products based on virtual Instruments and reverse engineering. The method comprises the following steps of: acquiring the point cloud data through a prototype product model at first, obtaining a prototype product curved surface model through utilizing an imageware software according to the obtained point cloud data, utilizing CATIA software to form a prototype product solid model of the curved surface model, using a parametrization design to obtain a new product solid model, analyzing and computing the new model through utilizing ANSYS software so as to obtain a new product model which satisfies requirements, and finally, storing the model into a database and quickly forming through a quick forming machine. The method consists of a prototype product model data acquiring part, a data processing, analyzing and managing part with a computation and analysis software and a quick forming part. The data acquiring part is an Optical Measuring Instrument, data measurement and acquisition can be realized through scanning, and the point cloud data of the model can be obtained.

Lin Hua - One of the best experts on this subject based on the ideXlab platform.

  • laser ultrasonic inspection of a wire arc additive manufactured waam sample with artificial defects
    Ultrasonics, 2021
    Co-Authors: Yan Zeng, Xunpeng Qin, Xiaokai Wang, Lin Hua
    Abstract:

    Abstract Certain defects like pores, incomplete fusion and micro cracks are sometimes inevitable in Wire + Arc Additive Manufactured (WAAM) components. However, these defects cannot be detected easily by conventional ultrasonic testing due to the rough surface and high temperature of WAAM components. In this paper, a Laser Ultrasonic (LU) system, consist of a pulsed laser and a laser interferometer, is employed to achieve non-contact inspection of artificial defects (crack, flat bottom hole and through hole) in a WAAM sample without surface machining. First, several WAAM samples with different welding parameters are manufactured by a robotic Gas Metal Arc Manufacture (GMAW) system. The 2D profiles of these samples are measured and reconstructed by a geometric Optical Measuring Instrument for Finite Element (FE) analysis. Then, the multi-physics (Heat Transfer, Solid Mechanics, Pressure Acoustics) coupled FE model is established to simulate LU inspection of defects in the WAAM sample. The propagation of laser ultrasonic waves in the WAAM sample, as well as the mechanism of interaction between ultrasonic waves and defects is investigated numerically. In addition, LU inspection experiments are designed and conducted to obtain the A- and B-scan plots of different defects in the WAAM sample. Finally, quantitative inspection of the artificial defects is realized by analyzing the A- and B-scan plots. This paper verifies the feasibility of LU inspection of WAAM components without surface machining.

Leach R. - One of the best experts on this subject based on the ideXlab platform.

  • Lateral error compensation for stitching-free measurement with focus variation microscopy
    2019
    Co-Authors: Perez P., Syam W.p., Albajez J.a., Santolaria J., Leach R.
    Abstract:

    This paper proposes a practical methodology to quantify and compensate lateral errors for focus variation microscopy measurements without stitching. The main advantages of this new methodology are its fast and simple implementation using any uncalibrated artefact. The methodology is applied by performing measurements with multiple image fields with and without stitching on an uncalibrated artefact and using the stitched measurements as reference. To quantify the lateral errors, the determination of their geometrical components is carried out through kinematic modelling. With the quantified errors, compensation can be applied for lateral measurements without stitching. Over the entire 200mm lateral range, the lateral errors without stitching and without compensation can reach up to 180 mu m. With the proposed error compensation methodology, the lateral errors have been reduced to around 15 mu m. The proposed methodology can be applied to any Cartesian-based Optical Measuring Instrument

Lin Hui - One of the best experts on this subject based on the ideXlab platform.

  • method for quickly designing mechanical products based on virtual Instruments and reverse engineering
    2013
    Co-Authors: Zhao Wenli, Lin Hui, Meng Qinghua, Fan Zhihua, Tian Yanping, Cheng Qiong, Hu Yanchao
    Abstract:

    The invention relates to a method for quickly designing mechanical products based on virtual Instruments and reverse engineering. The method comprises the following steps of: acquiring the point cloud data through a prototype product model at first, obtaining a prototype product curved surface model through utilizing an imageware software according to the obtained point cloud data, utilizing CATIA software to form a prototype product solid model of the curved surface model, using a parametrization design to obtain a new product solid model, analyzing and computing the new model through utilizing ANSYS software so as to obtain a new product model which satisfies requirements, and finally, storing the model into a database and quickly forming through a quick forming machine. The method consists of a prototype product model data acquiring part, a data processing, analyzing and managing part with a computation and analysis software and a quick forming part. The data acquiring part is an Optical Measuring Instrument, data measurement and acquisition can be realized through scanning, and the point cloud data of the model can be obtained.