Measurement of Dynamic Performances of High-Speed Rotating Spindle by Non-Contact Electromagnetic Loading Device

Wan, Shaoke; Hong, Jun; Su, Wenjun; Li, Xiaohu; Sun, Yanhui; Chen, Wei

doi:10.1115/imece2017-70301

Cited by 6 publications

(3 citation statements)

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“…However, when encountering high-speed spindle, the contact loading method will suffer from a high-velocity contact friction, this is absolutely unacceptable. Non-contact loading method generally applys an external load with using gas loading [15] and electromagnetic loading [11,12,14,16]. The gas loading method appears lots of drawbacks, for example, the loading ability is small, the manufacturing for high accuacry airpillow is costly, and the air compressor needed is too large in volume to be portable.…”

Section: Introductionmentioning

confidence: 99%

“…So far, in terms of spindle with rolling bearings, the force displacement method is usually utilized to measure its spindle nose stiffness [9][10][11][12]. There are two loading methods: contact loading method [7][8][9][10]13] and non-contact loading method [11,12,[14][15][16]. The contact loading method generally applys an external load by machanical transmission, so the applied load can reach a large value.…”

Section: Introductionmentioning

confidence: 99%

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An Experimental and Theoretical Approach for Stiffness of Machine Tool Spindle with Fluid Bearings

Xu¹,

Huang²,

Jiang³

2023

Preprint

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Machine tool spindle stiffness is a leading technical indicatoraffecting cutting ability. However, the stiffness of the machine tool spindle with fluid bearings has not been studied thoroughly. This paper proposes a new methodology for the spindle stiffness with fluid bearing including definition of the spindle nose stiffness, experimental method and calculation method for this stiffness. A motorized spindle with hydrodynamic water-lubricated spiral groove bearings developed in our laboratory is selected as an object, a theoretical and experimental investigation on the spindle nose stiffness is conducted. The result shows that the proposed experimental method can be utilized to measure the nose stiffness of spindle with the fluid bearings, meanwhile, the spindle stiffness can be obtained by simultaneously solving the rotor dynamic model and the fluid bearing dynamic model. The fluid bearing spindle stiffness depends strongly on the rotary speed and the external load. We expect an improvement for the experimental device by introducing another load device to apply a perturbation load with an any angle to the external load on the spindle nose.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Experimental and Theoretical Approach for Stiffness of Machine Tool Spindle with Fluid Bearings

Xu¹,

Huang²,

Jiang³

2023

Preprint

View full text Add to dashboard Cite

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“…Matsubara et al [19,20] proposed a magnetic loading device to provide swept-sine-wave load to the motorized spindle and studied the stiffness characteristics of the high-speed spindle under the loading state. Wan et al [21] developed a noncontact electromagnetic loading device to provide desirable excitation and measure the dynamic performances of the spindle system under different rotating conditions. Qiu and Liu [22,23] realized the simulation of cutting force for the motorized spindle by employing electromagnetic forces and analyzed the influencing factors to validate the effectiveness of the noncontact electromagnetic loading method.…”

Section: Introductionmentioning

confidence: 99%

Reliability Test Rig of the Motorized Spindle and Improvements on Its Ability for High‐Speed and Long‐Term Tests

Yang

Chen

Luo

et al. 2021

Shock and Vibration

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To realize the accurate performance test under high-speed operation and the long-term stable reliability test of the motorized spindle, a reliability test rig (RTR) which can simulate the cutting force in the actual machining process is presented. Firstly, a reasonable prototype integrating dynamic force loading devices and torque loading devices is designed and established based on the load analysis of the spindle, and a complete and explicit control strategy of the reliability loading test is designed. Secondly, the effects of misalignment of the diaphragm coupling caused by assembling are analyzed, and experiments are conducted to test the axis orbit of the motorized spindle. The experimental results illustrate that the axis orbit can identify the occurrence of misalignment, which ensures timely adjustment of misalignment and the accurate performance test under high-speed operation. Lastly, a damper is added in the mechanical structure of the electrohydraulic servo loading system (EHSLS), and the comparison of Bode maps before and after optimization is analyzed by the Nyquist criterion. After the optimization, the gain and phase margin of the Bode diagram are 12.9 dB and 57.2°, respectively, which are both within the stable range and validate the improvements on the ability of long-term reliability tests of the motorized spindle. The presented RTR is able to simulate the actual cutting force and provides an efficient loading approach to guarantee the accuracy and stability of motorized spindle tests.

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Dynamic support stiffness of motorized spindle bearings under high-speed rotation

Tian

Zhao

Dong

2021

Int J Adv Manuf Technol

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The rotor operating stiffness of high-speed motorized spindles (HSMSs) is key to machining accuracy. Because HSMSs are difficult to load due to their high speeds, a contact loading device was developed to test rotor operating stiffness. The dynamic support stiffness of the front/rear bearings (DSSB) is the main factor affecting the rotor operating stiffness. Two novel experimental schemes for measuring the DSSB are proposed: 1) indirect measurement-by analysing deformation displacements at two points on the external loading rod of the HSMS, and 2) direct measurement-by eddy current sensors installed near the front/rear bearings. Based on the experimental device and two experimental schemes, the influences of working-condition parameters on the DSSB were tested. The results show that the proposed experimental device and two experimental schemes can effectively and accurately measure rotor operating stiffness and DSSB at speeds of up to 30,000 rpm. However, because the tapered connection gap between the loading rod and rotor increases the measured deformation displacement, the DSSB measured by the indirect measurement scheme was relatively small. The DSSB decreases with speed and increases with radial force and working temperature. This study provides a new experimental basis for the quality inspection of finished HSMSs and the verification of theoretical bearing stiffness models.

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Measurement of Dynamic Performances of High-Speed Rotating Spindle by Non-Contact Electromagnetic Loading Device

Cited by 6 publications

References 0 publications

An Experimental and Theoretical Approach for Stiffness of Machine Tool Spindle with Fluid Bearings

An Experimental and Theoretical Approach for Stiffness of Machine Tool Spindle with Fluid Bearings

Reliability Test Rig of the Motorized Spindle and Improvements on Its Ability for High‐Speed and Long‐Term Tests

Dynamic support stiffness of motorized spindle bearings under high-speed rotation

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