Compilation of load spectrum of machining center spindle and application in fatigue life prediction

Li, Guofa; Wang, Shengxu; He, Jialong; Wu, Kai; Zhou, Chuanyang

doi:10.1007/s12206-019-0312-3

Cited by 23 publications

(11 citation statements)

References 28 publications

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“…Different bandwidths will affect the accuracy of KDE and the smoothness of the KDE curve. Literature [7,8] shows that the dynamic cutting force distribution is uneven, showing a multi-peak distribution, which leads to different estimation effects at different positions with different bandwidths. A goodness-smoothness comprehensive evaluation method based on entropy method is proposed to evaluate the estimation results for cutting force data.…”

Section: Goodness-smoothness Comprehensive Evaluation (G-sce)mentioning

confidence: 99%

“…It shows the relationship between the load and the occurrence frequency or applied time [1]. Load spectrum can reflect the distribution law of random load, so it is widely used in reliability test of component structure [9,30], fatigue life prediction [5,8,10,31], reliability design [2,27], accelerated test [3] and other aspects. Compiling a scientific and reasonable load  Jialong He hejl@jlu.edu.cn  Guofa Li ligf@jlu.edu.cn spectrum of CNC machine tools can provide basic data for the reliability design, reliability tests and reliability evaluation of key components [23,24].…”

Section: Introductionmentioning

confidence: 99%

“…However, there is often a large gap between the basic function assumption of the parametric model and the actual physical model [7,14]. Meanwhile, it is inaccurate to use the interval mean value to represent the load value in the interval [8] because the distribution of the load value in the interval is not necessarily uniform, which will produce larger errors. More importantly, the density distribution is greatly affected by the width of the sub-interval (that is, each histogram).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compilation method of CNC lathe cutting force spectrum based on kernel density estimation of G-SCE

Wang

et al. 2021

Int J Adv Manuf Technol

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The cutting force spectrum of the CNC lathe is the basic data for the reliability design, reliability test and reliability evaluation of the CNC lathe and its components. Due to the complex and changeable turning conditions and different cutting processes, the cutting load presents multi-peak characteristic. In order to compile the CNC lathe cutting force spectrum accurately, a compilation method based on kernel density estimation (KDE) of goodnesssmoothness comprehensive evaluation (G-SCE) is proposed. According to the measured dynamic cutting force, the KDE is used to establish the dynamic cutting force distribution of the CNC lathe. For the rule of thumb method (ROT) based on the mean integrated square error and the least squares cross-validation method (LCV) based on the integrated square error does not take into account the influence of different bandwidths on the goodness estimation and the smoothness of the estimated curve. The estimation accuracy test method based on multiple goodness-of-fit tests, and the smoothness test method based on the envelope curve are proposed. The entropy method is used to comprehensively calculate the estimated goodness index and the smoothness index to determine the optimal bandwidth. The case analysis shows that the method proposed can solve the problem of too large estimation error of parameter distribution for multimodal distribution. At the same time, it can better comprehensively evaluate the KDE under different bandwidths. In short, a new method of optimal bandwidth selection is proposed in the original method.

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Section: Goodness-smoothness Comprehensive Evaluation (G-sce)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compilation method of CNC lathe cutting force spectrum based on kernel density estimation of G-SCE

Wang

et al. 2021

Int J Adv Manuf Technol

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“…Motorized spindle operates under countless speed and load combinations, but several typical load conditions may be summarized by statistical method from the field data. This typical load scheme is called a load spectrum in engineer for the guidance of spindle design and experiment [29], [30]. Because it is impossible to test all the load conditions in Zone-V, a typical load area is defined considering the range of speed in x axis, and the maximum and minimum load range in y axis (Fig.…”

Section: B Multi-conditions Performance Evaluationmentioning

confidence: 99%

Load-Dependent Rotating Performance of Motorized Spindles: Measurement and Evaluation Using Multi-Zones Error Map

et al. 2019

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The rotating performance of motorized spindles is critical to the dimensional accuracy and surface quality of the parts to be machined. This paper proposes a novel measurement strategy and an evaluation method of spindle's rotating performance, considering the loads imposed on the spindle. To be specific, cutting loads are simplified as a unified function to guide the load simulation, and the load-induced error is eliminated using a position adjustment procedure. In a certain speed-load combination, the spindle's rotating performance under the unified load function is measured using a data envelope method. To extend the assessment to all typical work conditions, an evaluation scheme for different speed and load combinations is proposed based on a visual ideal of Multi-Zones Error Map (MZE Map). The necessity of considering the load-dependent rotating performance is demonstrated via several tests conducted on proposed load simulation platform. Besides, the procedures for developing the MZE Map are performed, and the results express an overview relationship between rotating performance and different speed-load conditions. The proposed method provides a new approach to evaluate the rotating performance considering the actual load conditions. This load-dependent oriented evaluating strategy contributes to a more precise health evaluation and management method for motorized spindles in actual machining process.INDEX TERMS Rotating machines, load modeling, performance evaluation, prognostics and health management.

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“…CNC machine tools require a large amount of energy consumption and generate carbon dioxide emissions. It is of great significance to select reasonable processing parameters to ensure product quality, extend tool life, and reduce production costs [9]. However, in the actual machining process, the three goals of reducing production cost, reducing carbon emissions, and improving production efficiency are usually contradictory.…”

Section: Introductionmentioning

confidence: 99%

Research on Blank Optimization Design Based on Low-Carbon and Low-Cost Blank Process Route Optimization Model

et al. 2021

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The optimization of blank design is the key to the implementation of a green innovation strategy. The process of blank design determines more than 80% of resource consumption and environmental emissions during the blank processing. Unfortunately, the traditional blank design method based on function and quality is not suitable for today’s sustainable development concept. In order to solve this problem, a research method of blank design optimization based on a low-carbon and low-cost process route optimization is proposed. Aiming at the processing characteristics of complex box type blank parts, the concept of the workstep element is proposed to represent the characteristics of machining parts, a low-carbon and low-cost multi-objective optimization model is established, and relevant constraints are set up. In addition, an intelligent generation algorithm of a working step chain is proposed, and combined with a particle swarm optimization algorithm to solve the optimization model. Finally, the feasibility and practicability of the method are verified by taking the processing of the blank of an emulsion box as an example. The data comparison shows that the comprehensive performance of the low-carbon and low-cost multi-objective optimization is the best, which meets the requirements of low-carbon processing, low-cost, and sustainable production.

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Compilation of load spectrum of machining center spindle and application in fatigue life prediction

Cited by 23 publications

References 28 publications

Compilation method of CNC lathe cutting force spectrum based on kernel density estimation of G-SCE

Compilation method of CNC lathe cutting force spectrum based on kernel density estimation of G-SCE

Load-Dependent Rotating Performance of Motorized Spindles: Measurement and Evaluation Using Multi-Zones Error Map

Research on Blank Optimization Design Based on Low-Carbon and Low-Cost Blank Process Route Optimization Model

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