A coaxiality measurement model based on multi-systematic errors separation for turbine shaft

Liu, Yongmeng; Li, Ruirui; Sun, Chuanzhi; Mei, Yingjie; Wang, Xiaoming; Tan, Jiubin; Wang, Hongye

doi:10.1016/j.measurement.2021.109975

Cited by 12 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liu et al [7] proposed a variety of solutions for the non-contact measurement of coaxiality of different objects, and proposed a method of measuring coaxiality error by applying capacitive sensors for suspended coils and outer magnet yokes, and constructed three mathematical models between the outputs of capacitive sensors and coaxiality error. In addition, they proposed a measurement model considering seven kinds of systematic errors for the coaxiality measurement of turbine shafts [8]. At the same time, they analyzed the influence of systematic errors on the angle as well as considered the deviation of the sample's angle, and designed an unequal-interval threedimensional morphology filter based on the sample's actual angle, which has a further improvement on the accuracy of coaxiality measurement.…”

Section: Prefacementioning

confidence: 99%

Research on the measurement method of crankshaft coaxiality error based on three-dimensional point cloud

Dou,

Zheng,

Ren

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

Aiming at the demand of rapid detection for coaxiality of crankshaft journal, a method of visual measurement of coaxiality error based on 3D point cloud is proposed. In this research, a laser scanner is utilized to obtain a 3D point cloud model of the part to be measured, and a circular method of rotary cutting is put forward to obtain equally spaced optimal slices of the journal. The center of the slice is then obtained using the Pratt circle fitting method optimized in this paper. After that, the center of the slice is used to obtain the common reference axis using the least squares method, which finally realizes the measurement of the coaxiality error. The experimental results show that the proposed method of getting the slices is more accurate, the maximum absolute error of the circle fitting method compared with the results of the coordinate measuring machine (CMM) is no more than 4.2 μm, and the maximum absolute error of the coaxiality detection results and the results of the CMM is 5.5 μm, which can satisfy the practical needs of fast and efficient measurement of the coaxiality error of crankshafts.

show abstract

Section: Prefacementioning

confidence: 99%

Research on the measurement method of crankshaft coaxiality error based on three-dimensional point cloud

Dou,

Zheng,

Ren

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Jin et al (2018) focused on the partial parallel chains problem from the deterministic deviations and used a four-stage rotors assembly to verify the solution. Liu et al (2021) proposed a seven systematic errors measurement model and an unequal interval three-dimensional morphological filter to improve the measurement accuracy of coaxiality error of turbine shaft. Shen et al (2015) proposed a quality control method of the engines’ cylinder block based on the Jacobian–Torsor model to improve the assembly accuracy of remanufactured parts.…”

Section: Introductionmentioning

confidence: 99%

Research on assembly accuracy of deployable arm based on Jacobian-Torsor model

et al. 2023

RIA

View full text Add to dashboard Cite

Purpose The purpose of this study is to establish an assembly accuracy analysis model of deployable arms based on Jacobian–Torsor theory to improve the assembly accuracy. Spacecraft deployable arm is one of the core components of spacecraft. Reducing the errors in assembly process is the main method to improve the assembly accuracy of spacecraft deployable arms. Design/methodology/approach First, the influence of composite connecting rod, root joint and arm joint on assembly accuracy in the tandem assembly process is analyzed to propose the assembly accuracy analysis model. Second, a non-tandem assembly process of “two joints fixed-composite rod installed-flange gasket compensated” is proposed and analyzed to improve the assembly accuracy of deployable arms. Finally, the feasibility of non-tandem assembly process strategy is verified by assembly experiment. Findings The experiential results show that the assembly errors are reduced compared with the tandem assembly process. The errors on axes x, y and z directions decreased from 14.1009 mm, 14.2424 mm and 0.8414 mm to 0.922 mm, 0.671 mm and 0.2393 mm, respectively. The errors round axes x and y directions also decreased from 0.0050° and 0.0053° to 0.00292° and 0.00251°, respectively. Originality/value This paper presents an assembly accuracy analysis model of deployable arms and applies the model to calculate assembly errors in tandem assembly process. In addition, a non-tandem assembly process is proposed based on the model. The experimental results show that the non-tandem assembly process can improve the assembly accuracy of deployable arms.

show abstract

“…Owing to structural constraints, most sections cannot be scanned continuously, and the measurement process is cumbersome and time-consuming. Aiming at the model engineering of large stepped shafts, Liu et al [10][11][12] designed a cylindrical contour measurement model with seven systematic errors to improve the surface contour measurement accuracy of large stepped shafts, which provides an accurate theoretical basis for the implementation of high-precision model engineering of cylindrical parts. However, its measurement method involved a contact measuring probe which in dynamic and high temperature rolling environments can be highly challenging.…”

Section: Introductionmentioning

confidence: 99%

Online measurement method for roundness of large aluminum alloy ring based on laser ranging principle

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

Aluminum alloy rings are widely used in aerospace, energy, petrochemical, and equipment applications. The loss of roundness often occurs because of the weak rigidity and unstable plasticity of aluminum alloy rings. Therefore, an online measurement technique for the roundness of aluminum alloy rings is critical for ensuring the processing quality of aluminum alloy rings. In this paper, an online roundness measurement method based on the laser ranging principle and improved particle swarm optimization (IPSO) is proposed with the aid of the rotation of the ring during the rolling process. First, the distance from the outer surface of the ring to the laser rangefinder was measured using a triangular laser rangefinder with the help of the rotation of the ring in the rolling process. Second, the distance data were denoized using an improved Kalman filter algorithm to reduce the influence of random noise on the measurement results. Finally, the roundness and geometric center were evaluated using the IPSO algorithm combined with the minimum zone circle (MZC) method and compared with the results obtained using the standard particle swarm optimization (PSO) algorithm, genetic algorithm (GA), and least square (LS) algorithm. The experimental results show that the roundness measured by the IPSO algorithm is less than 0.06 mm, demonstrating better performance in the roundness evaluation. The measurement method for roundness proposed in this paper is suitable for the online evaluation of large aluminum alloy rings, avoiding the influence of ring size on roundness measurement.

show abstract

A coaxiality measurement model based on multi-systematic errors separation for turbine shaft

Cited by 12 publications

References 28 publications

Research on the measurement method of crankshaft coaxiality error based on three-dimensional point cloud

Research on the measurement method of crankshaft coaxiality error based on three-dimensional point cloud

Research on assembly accuracy of deployable arm based on Jacobian-Torsor model

Online measurement method for roundness of large aluminum alloy ring based on laser ranging principle

Contact Info

Product

Resources

About