A new method using double distributed joint interface model for three-dimensional dynamics prediction of spindle-holder-tool system

Yang, Yun; Wan, Min; Ma, Yingchao; Zhang, Wei-Hong

doi:10.1007/s00170-017-1394-7

Cited by 14 publications

(4 citation statements)

References 38 publications

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“…The stiffness matrix of bearing [Kb] and the contact stiffness matrix [KC] are the spindle support and components connection parameters, which need to be established additionally. Usually, the tooltip frequency response test is used to identify the bearing stiffness and contact stiffness, which relies on the detection equipment, and the spindle with different structures needs to be measured again [20][21][22][23]. To avoid this limitation and facilitate the prediction of spindle dynamic performance in the design phase, this paper uses the physical model to establish the bearing and contact stiffness.…”

Section: Dynamic Model Establishmentmentioning

confidence: 99%

Lifetime analysis of motorized spindle bearings based on dynamic model

Jiang

Yang

Chen

et al. 2021

Int J Adv Manuf Technol

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The traditional probabilistic-based lifetime evaluation methods for motorized spindles neglect the effects of load dynamic and structure difference. Hence, a dynamic-model-based lifetime estimation method combining these effects is proposed to improve the estimating results for motorized spindles, especially in the design stage. Considering the bearings lifetime has dramatically influenced the reliability of motorized spindles, this paper establishes a shaft-bearing-toolholder based on a dynamic model to estimate the bearing group lifetime. The proposed dynamic model is closer to the actual structure in spindles, indicating the stiffness of bearings and contact surface conditional on the inputting radial-and-axial forces is nonlinear. The stiffness model is verified by finite element analysis and experiment. The load applied to bearings is accurately calculated through the dynamic model. Then, the load is introduced to a well-known bearing lifetime model, thereby calculating the lifetime of each bearing and its group. The bearing lifetime results under different conditions of preload, clamping force, and cutting force are discussed.

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Section: Dynamic Model Establishmentmentioning

confidence: 99%

Lifetime analysis of motorized spindle bearings based on dynamic model

Jiang

Yang

Chen

et al. 2021

Int J Adv Manuf Technol

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“…They found that chatter can be easily identified using the above techniques during thin-wall machining. An accurate chatter prediction model was developed, which simultaneously considered the influence of material removal, work-tool dynamic behavior, and tool position [9,10].…”

Section: Introductionmentioning

confidence: 99%

Influence of End Mill Geometry on Milling Force and Surface Integrity While Machining Low Rigidity Parts

Joshi

Bolar

2020

J. Inst. Eng. India Ser. C

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High precision and superior surface finish are of prime importance in thin-wall components used in the aerospace and automobile industries. In this paper, end milling experiments on aluminum alloy 2024-T351 were carried out to study the influence of end mill geometry on milling force and surface integrity of the machined parts. Machining using a 16-mm-diameter tool having a helix angle of 35°produced high force value and also generated chatter marks on the machined work surface. Furthermore, an inspection of the cutting tool indicated built-up-edge formation while machining with a 35°helix tool. Besides, surface damage in the form of surface tear was observed. Evaluation of microhardness revealed an increased value near to the machined surface in the case of two fluted 35°h elix tool due to strain hardening. The results showed that lower milling force and surface roughness were obtained while machining used a four fluted end mill having a diameter of 8 mm and a helix angle of 55°.

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“…Therefore, the efficiency and accuracy of prediction for the machine tools' performance are primarily decided by how we treat joints in the analytical model. However, a CNC machine is built up by many parts and complex substructures, and those substructures are connected by kinds of joints such as fixed joints and bolt joints [4][5][6]. Mechanics and heat conduction characteristics between joints always vary inconsistently, which increases the difficulty to predict the performance of the whole machine.…”

Section: Introductionmentioning

confidence: 99%

“…For example, to study dynamics of the spindle-holder-tool system, joints between tool and holder should be specially considered. Yang et al use two sets of discrete spring-damping elements to substitute tool-holder connection surfaces [7], and Ahmadi adopts a distributed elastic interface layer between the holder-spindle and the tool part, which organized by numbers of spring-damping elements [8]. To calculate the natural frequency and vibration mode shape of a machine tool bed, Daisuke et al propose a 3D stiffness model of a machine tool support, which is constituted by three springdamping units along three-axis direction respectively [9].…”

Section: Introductionmentioning

confidence: 99%

An improved static stiffness analysis model for machine tools based on virtual material method

Fan

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The static stiffness of machine tools can be used for the analysis of thermal deformation because of the uneven temperature field and can further be applied in the thermal error compensation. The prediction of static performance of machine tools is fundamental and essential during the design period. The purpose of this paper is to establish a precise static stiffness model for machine tools. Different from previous models, the proposed method in this paper, basing on the Fractal Geometry, takes both the elastoplastic deformation mechanism and friction into account. By analyzing the normal stiffness and tangential stiffness of joints, equivalent virtual material parameters are acquired for the finite element analysis calculation. An experimental setup has been established to test X, Y and Z directional deformation of a vertical machine center with a magnitude of 200 kgf load applied to the node of the spindle along the respective direction. The results demonstrate that the proposed model can accurately simulate static characteristics of machine tools.

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A new method using double distributed joint interface model for three-dimensional dynamics prediction of spindle-holder-tool system

Cited by 14 publications

References 38 publications

Lifetime analysis of motorized spindle bearings based on dynamic model

Lifetime analysis of motorized spindle bearings based on dynamic model

Influence of End Mill Geometry on Milling Force and Surface Integrity While Machining Low Rigidity Parts

An improved static stiffness analysis model for machine tools based on virtual material method

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