Development of a Roundness Profile Measurement System for Parallel Rollers Based on a V-Block Method.

Goho, Kenji; Mitui, K.; Hayashi, Atsushi

doi:10.1299/jsmec.42.410

Cited by 5 publications

(2 citation statements)

References 0 publications

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“…The simulation results illustrate that the auxiliary supports produced by steady rests are effective to make up for the elastic deformation of crankshaft caused by gravity. The auxiliary support forces produced by steady rests have significant impact on the positions of main journal centers [7]. Therefore, it is necessary to control the positions of support pads of steady rests automatically and accurately for improving the elastic deformation as much as possible.…”

Section: Compensation Of the Auxiliary Support For The Deformation Of...mentioning

confidence: 99%

Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding

Shen

Wang

et al. 2014

AMM

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Due to the discontinuous axis and the big ratio of length to diameter, the large-scale crankshaft is easy to generate the complex elastic deformation under the effect of the huge gravity and the clamping force on non-circular grinding machine. The distinctive deformation deteriorates the coaxiality of all the main journals and thus the grinding precision of crankpins in non-circular grinding. In this paper, the statics analysis of large-scale crankshaft has been conducted by using the finite element simulation. The overall deformation of crankshaft and the position offset of each main journal center without or with the auxiliary supports have been simulated and contrasted. The results manifest that the auxiliary support forces produced by the steady rests have the positive effect on the compensation for crankshaft deformation. On this basis, to satisfy the demand of position adjustment of the upper and lower support pads of servo-controlled open steady rest, the on-machine measurement method and device of the position of main journal center is proposed. And then the offset calculation model of the main journal center is deduced using the measured data. The measurement method and device are beneficial for the straightening of the crankshaft and the improvement of machining accuracy of crankpins in non-circular grinding.

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Section: Compensation Of the Auxiliary Support For The Deformation Of...mentioning

confidence: 99%

Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding

Shen

Wang

et al. 2014

AMM

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show abstract

“…There have been reports about the multi-point method from different viewpoints: a method that uses more than three displacement sensors [11][12][13], a method that uses angle sensors [14][15][16], a method that measures from the axial direction [17,18] and other methods [19][20][21]. In addition, a method of roundness measurement using a V-block [22][23][24][25] is a type of three-point method that measures a cylinder at one point and supports it at the other two points. Moreover, there have been reports about the three-point method used for straightness measurements [26], and the relationship between roundness and straightness measurements has been clarified [27,28].…”

Section: Introductionmentioning

confidence: 99%

Effects of sensor noise in digital signal processing of the three-point method

Fujimaki

Sase

Mitsui

2007

Meas. Sci. Technol.

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The three-point method is a technique that uses three displacement sensors to separate the out of roundness of a reference sphere or cylinder as well as the spindle run-out. This method has high potential for ultra-high-precision measurements. However, applications of the three-point method have been impeded because the setting angles of the sensors have not been clearly established. In this paper, the effects of uncorrelated noise in sensor outputs on the calculation results of the roundness are analyzed by applying the process of the three-point method as a digital filter. Then, the optimum sensor angles, which minimize the effects of the noise, are computed where there is uncorrelated white or pink noise in sensor outputs. In addition, the effects of correlated noise in sensor outputs are analyzed.

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Real time monitoring and diagnosis system development in turning through measuring a roundness error based on three-point method

Jeong

Kim

Jang

2005

International Journal of Machine Tools and Manufacture

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Development of a Roundness Profile Measurement System for Parallel Rollers Based on a V-Block Method.

Cited by 5 publications

References 0 publications

Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding

Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding

Effects of sensor noise in digital signal processing of the three-point method

Real time monitoring and diagnosis system development in turning through measuring a roundness error based on three-point method

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