Factors influencing the performance of a roundness measuring instrument – Development of an empirical model

Raj, Arun P.; Ravi, Avneesh Kumar; Dhanish, P.B.

doi:10.1016/j.measurement.2018.08.045

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…There are also numerous papers dedicated to cylindricity measurement generally [17], and to the V-block measurement method [18]. Even though many factors that influence the performance of a roundness measuring instrument should be considered [19], including a roundness measurement algorithm [20], here, the most important was the random effect. Thus, measurement uncertainty was calculated using type A method.…”

Section: Measurement Results and Correctionmentioning

confidence: 99%

Computerised grinding procedure for large scale crankshaft machining

Siemiątkowski

2019

MATEC Web Conf.

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The paper describes sequence of machining operations that leads to the desired quality of the produced crankshaft, as well as in-situ inspection, correction and compensation procedures performed and controlled by computer. The form deviation values after correction are being compared with those obtained before. In case of crank pins, values of form deviations, and hence those of corrections, are much larger than for main journals. During the measurement, the probe collects data from 3600 points per revolution, and then averaging procedure reduces data down to 360 points. There are several algorithms for data processing available, so the operator may choose the one most appropriate. Substantial difference between out-ofroundness values of main journals and crank pivot was registered. Before form compensation, the former was between 0.01 and 0.02 mm, while the latter were in range 0.07-0.09 mm. Program of grinding is parametric, i.e. at each stage of the process all values responsible for the tool movement undergo correction. The applied computer monitoring enabled to achieve the demanded quality of grinded surface, as well as dimensions and form deviations in the tolerances set by the product specifications. Form compensation procedure enabled to reduce peak-to-peak deviation from 30.37 μm down to 8.14 μm.

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Section: Measurement Results and Correctionmentioning

confidence: 99%

Computerised grinding procedure for large scale crankshaft machining

Siemiątkowski

2019

MATEC Web Conf.

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“…Substituting equation (11) into equation (10) and eliminating the component of the shaft system rotation error on the X axis and Y axis, we can obtain:…”

Section: Reconstruct the Axis Theory Modelmentioning

confidence: 99%

“…In-situ inspection of cylindricity for the whole shaft system is based on multiple cross sections for error detection, while the technique used for error detection of single section is the error separation technique (EST) [9], the essence of which lies in extracting its different components from multiple signals with different phases and decoupling the signals using redundant information in multiple signals and other reasonable assumptions [10,11]. The current commonly used error separation method is the multiple probe method [12], and the error separation method based on the three-probe method can effectively avoid harmonic distortion by selecting a reasonable probe placement angle [13].…”

Section: Introductionmentioning

confidence: 99%

Shaft system profile reconstruction method based on L-shaped axial four-probe method

An¹,

Zhang²,

Liu³

et al. 2021

Meas. Sci. Technol.

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The inability to extract spatial axis and radial multi-error coupling phenomenon exists in the process of axial profile reconstruction, which is essentially a first harmonic suppression problem as well as a multi-error decoupling problem. In this paper, a four-probe system is constructed based on an L-shaped arrangement in two adjacent planes. First, the mathematical model of the first harmonic suppression problem of the shaft system is established in the first plane, and the first harmonic component of roundness error is used as the axial reference for reconstructing the profile, and the value of the first-order harmonic component is solved by theoretical derivation, and the spatial axis of the reconstructed shaft system profile is fitted with it, which proves the correctness of the established mathematical model by the data simulation. Then, the radial mixed error detection is carried out in two adjacent planes in the axial direction, and the results measured at the two measurement positions are analyzed theoretically to obtain the tilt error decoupling formula. It breaks through the limitation that the error separation online detection cannot be performed in the standard ball measurement method. The experiment verifies that the accuracy of the spatial axis is improved by up to 0.5 μm after decoupling the tilt error, and the accuracy of the reconstructed circularity profile of a single section is improved by up to 2.657 mm. In the comparison experiment with the standard ball measurement method, the difference of the measured roundness error between the two methods does not exceed 1.2 μm, which proves that the online inspection method proposed in this paper can guarantee the accuracy of the reconstructing circularity profile.

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Practical revision of error separation technique to improve cylindricity measurement

Maury

Lorenzo

2023

Measurement

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Factors influencing the performance of a roundness measuring instrument – Development of an empirical model

Cited by 4 publications

References 14 publications

Computerised grinding procedure for large scale crankshaft machining

Computerised grinding procedure for large scale crankshaft machining

Shaft system profile reconstruction method based on L-shaped axial four-probe method

Practical revision of error separation technique to improve cylindricity measurement

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