Influence of ultra-precision flycutting spindle error on surface frequency domain error formation

Chen, Guoda; Sun, Yazhou; Zhang, Feihu; An, Chenhui; Chen, Wanqun; Hao, Shuai

doi:10.1007/s00170-016-9024-3

Cited by 33 publications

(20 citation statements)

References 24 publications

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“…Potassium dihydrogen phosphate (KDP) crystals are crucial to laser ignition facilities as optical switching and frequency conversion components for inertial confinement fusion [1]. To fabricate the KDP crystal component, the main technology employed is ultra-precision diamond fly cutting [2,3]. However, machining-induced damage, such as crack and collapse, often emerges on the component surface/subsurface because of the brittleness of KDP crystals, significantly reducing the laser damage threshold of its components.…”

Section: Introductionmentioning

confidence: 99%

Elastic-plastic-brittle transitions of potassium dihydrogen phosphate crystals: characterization by nanoindentation

et al. 2020

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Potassium dihydrogen phosphate (KDP) crystals are widely used in laser ignition facilities as optical switching and frequency conversion components. These crystals are soft, brittle, and sensitive to external conditions (e.g., humidity, temperature, and applied stress). Hence, conventional characterization methods, such as transmission electron microscopy, cannot be used to study the mechanisms of material deformation. Nevertheless, understanding the mechanism of plastic-brittle transition in KDP crystals is important to prevent the fracture damage during the machining process. This study explores the plastic deformation and brittle fracture mechanisms of KDP crystals through nanoindentation experiments and theoretical calculations. The results show that dislocation nucleation and propagation are the main mechanisms of plastic deformation in KDP crystals, and dislocation pileup leads to brittle fracture during nanoindentation. Nanoindentation experiments using various indenters indicate that the external stress fields influence the plastic deformation of KDP crystals, and plastic deformation and brittle fracture are related to the material's anisotropy. However, the effect of loading rate on the KDP crystal deformation is practically negligible. The results of this research provide important information on reducing machining-induced damage and further improving the optical performance of KDP crystal components.

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Section: Introductionmentioning

confidence: 99%

Elastic-plastic-brittle transitions of potassium dihydrogen phosphate crystals: characterization by nanoindentation

et al. 2020

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“…Liu et al [4] developed a new spindle error measurement system which employs a design development rotational fixture with a built-in laser diode and four batteries to replace a precision reference master ball or cylinder used in the traditional method. Chen et al [12] study the influence of spindle error on the frequency domain error formation of machined surface in ultraprecision fly cutting. Lu et al [13] proposed two key problems in the measurement of the rotation error.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Evaluation of Rotation Accuracy of Hydrostatic Spindle under the Influence of Unbalance

Chen

Zhao

Liu

2020

Shock and Vibration

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The paper studies the characterization and evaluation technology of rotation accuracy of hydrostatic spindle under the influence of unbalance. The dynamic model of the motion error of the hydrostatic spindle is established based on the dynamic parameters. The variation law of motion error of spindle rotor is analyzed under the unbalanced mass. The paper finds that with the increase of the spindle speed, the amplitude of the spindle error motion will increase, and the inclination angle θ error is more sensitive to the change in the rotational speed. In the total synthesis accuracy, the proportion of synchronization error decreases with the increase of the rotational speed. Finally, the least squares evaluation algorithm is used to evaluate the rotation error of the hydrostatic spindle, and a method for evaluating the rotation accuracy of the hydrostatic spindle with high calculation accuracy and calculation efficiency is proposed.

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“…Rotary motions can be found in the majority of machine tools and the study of spindle error motions has always been a necessity for machine tool manufacturers [1,2]. Usually, a precise cylinder datum is mounted on the spindle rotor and the circumferential shape of the datum is treated as a perfect circle.…”

Section: Introductionmentioning

confidence: 99%

In Situ Measurement of Spindle Radial and Tilt Error Motions by Complementary Multi-probe Method

et al. 2019

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This paper presents a complementary multi-probe method for measurement of radial and tilt error motions of a spindle. Neither indexing of artefact nor rotating of spindle housing is required and thus make it suitable for in situ evaluation of spindle performance effectively. In order to minimize the harmonic suppression problems commonly encountered in the multi-probe measurement approach, three sets of probe angle combinations were optimized and the harmonics of the three measurements were extracted and composed to reveal the true artefact errors in a complementary way. The exact probe angles were identified by the correlation function of the probe signals after the sensors are mounted onto the fixture and the requirement of high-precision fixtures was alleviated. The evaluation of measurement results showed that the erroneous harmonics were greatly reduced by 70%. Using this method, the radial error motions of the precision air bearing spindle were measured at seven axial positions and then the synchronized tilts error motions were calculated. This demonstrated an effective approach for measuring four degree-of-freedom error motions in one setup with a small number of displacement sensor probes.

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Influence of ultra-precision flycutting spindle error on surface frequency domain error formation

Cited by 33 publications

References 24 publications

Elastic-plastic-brittle transitions of potassium dihydrogen phosphate crystals: characterization by nanoindentation

Elastic-plastic-brittle transitions of potassium dihydrogen phosphate crystals: characterization by nanoindentation

Characterization and Evaluation of Rotation Accuracy of Hydrostatic Spindle under the Influence of Unbalance

In Situ Measurement of Spindle Radial and Tilt Error Motions by Complementary Multi-probe Method

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