Thermal energy balance control model of motorized spindle system enabling high-speed dry hobbing process

Li, Benjie; Cao, Huajun; Yang, Xiao; Jafar, Salman; Zeng, Deqiang

doi:10.1016/j.jmapro.2018.07.010

Cited by 36 publications

(7 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to the hobbing process, in the CM process, the FS rotation is the main movement (autorotation around the Z axis), which rotates continuously around the axis at a constant speed. Relative to FS, the hob has three directions of motion, which are rotary motion (autorotation around the X axis), circumferential motion (along the X axis), and axial feed motion (along the Z axis) (Li et al, 2018;, as shown in Fig. 3.…”

Section: Principle Of Circumferential Modificationmentioning

confidence: 99%

Circumferential spatial tooth profile modification of flexspline for strain wave gear (A novel method and a case study)

HUANG,

QIAN,

WEI

et al. 2023

JAMDSM

View full text Add to dashboard Cite

Strain wave gear, also known as "harmonic drive" is widely used in the industrial robotics field due to the excellent deceleration performance. The tooth modification of the flexspline faces the requirements of high accuracy and service life. In this paper, a novel spatial tooth profile modification method along the circumferential direction of flexspline for strain wave gear is proposed. The circumferential modification method has a small change of meshing point position and working pressure angle, which is beneficial to maintain the transmission accuracy and improve the service life. In addition, the relation model of spatial motion between hob and flexspline, and the relation between tooth profile and modification quantity are study in the view of engineering application aim to reveal that the principle of circumferential modification is the rotation of the tooth profile along the center of the tooth apex circle. And the feasibility of circumferential modification is verified by a actual machining. Then, two main factors, circumferential modification quantity and radius of flexspline indexing circle are analyzed. Afterward, the novel stepwise modification of the circumferential spatial tooth profile of flexspline is introduced. Finally, a case study of circumferential spatial tooth profile modification of flexspline for strain wave gear is conducted. The case study shows that the maximum distance offset value in circumferential modification is 7.8 μm, which is smaller than the traditional modification value (13.2 μm), and the maximum working pressure angle value is 2.24 °, which is smaller than the minimum value (3.93 °) in traditional modification. And the FEM results and the cross-section tooth pairs comparing with the theoretical model also show the possibility of the proposed modification method.

show abstract

Section: Principle Of Circumferential Modificationmentioning

confidence: 99%

Circumferential spatial tooth profile modification of flexspline for strain wave gear (A novel method and a case study)

HUANG,

QIAN,

WEI

et al. 2023

JAMDSM

View full text Add to dashboard Cite

show abstract

“…39 Consequently, it can be considered that thermal convection occurs through compressed air while the heat transfer of lubricating oil is ignored. Hence, the coefficient in the bearing chamber can be written as 3 where a0, a1, and a2 are the values summarized by experiment, and can be taken as 9.7, 5.33, and 0.8, respectively; u is the airflow velocity on the bearing surface(m/s), which is synthesized by the axial flow acting on bearing and the radial flow formed by bearing rotation, and it can be listed as 40 where ubearing is the linear velocity of the bearing inner ring surface (m/s) since the bearing outer ring is fixed, and the air circumferential velocity urad in the gap changes linearly along the radius, which can be expressed aswhere Vair is the airflow rate sprayed from the nozzle (m3/s); …”

Section: Heat Transmission Mechanism In the Motorized Spindlementioning

confidence: 99%

An optimized thermal network model to evaluate the thermal behavior on motorized spindle considering lubricating oil and contact factors

Chen

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

During the operation of the high-speed motorized spindle, the heating of motorized spindle components can cause thermal deformations, which worsens the work performance and shortens the life expectancy of the motorized spindle. In response to the above behaviors, the thermal network model for the motorized spindle in this investigation was built in which the lubricating oil properties and contact characteristics were considered. Next, according to Kirchhoff's energy balance principle, the theoretical equations of steady-state temperature were established, and the temperature rise of the motorized spindle was obtained by Newton-Raphson method. Lastly, the influences of speed, cooling water flow rate, air flow rate and other variables on the temperature were analyzed and verified by the experiment. The results show that the thermal network model including lubricating oil and contact factors can predict the temperature rise of motorized spindle accurately, which provides some references and suggestions in motorized spindle design.

show abstract

“…Then, when the thermal equilibrium is reached, dQ accum /dt = 0 can be established to calculate the spindle temperature at this state. Based on one of our previous studies [37], the temperatures of spindle housing and bearing cover can be properly applied to indicate the spindle motor temperature and bearing temperature, respectively. The temperatures of spindle motor and bearing are then expressed as the following Equations ( 15) and ( 16) [37].…”

Section: Spindle Temperature At Thermal Equilibrium Statementioning

confidence: 99%

Energy Optimization for Motorized Spindle System of Machine Tools under Minimum Thermal Effects and Maximum Productivity Constraints

Zheng

Yang

et al. 2020

Energies

Self Cite

View full text Add to dashboard Cite

Motorized spindle system is one of the crucial components affecting the machine tools energy performance. Many previous studies have examined its energy optimization problems, however, most such studies focused mainly on parameters optimization to improve material removal energy efficiency or reduce total energy consumption. A missing research area is energy optimization problem considering thermal stability and productivity constraints simultaneously. Against this background, an energy optimization approach of motorized spindle system is presented with consideration of thermal stability and productivity adequately, with the goal of maximization of energy efficiency and material removal rate, and minimization of spindle average temperature which is closely associated with thermal stability. Firstly, the energy characteristics of motorized spindle and its cooling system are mathematically modelled. Then, a multi-objective optimization model is established to take the maximum energy efficiency, minimum spindle average temperature, and maximum material removal rate as objectives. The optimal solution is obtained by solving the proposed optimization model with the Non-dominated Sorted Genetic Algorithm-II (NSGA-II). Finally, a case study is introduced to validate the proposed method and the results indicate that the proposed method is more effective to find optimal decision variables for balancing the considered objectives compared with the existing optimization method.

show abstract

Thermal energy balance control model of motorized spindle system enabling high-speed dry hobbing process

Cited by 36 publications

References 39 publications

Circumferential spatial tooth profile modification of flexspline for strain wave gear (A novel method and a case study)

Circumferential spatial tooth profile modification of flexspline for strain wave gear (A novel method and a case study)

An optimized thermal network model to evaluate the thermal behavior on motorized spindle considering lubricating oil and contact factors

Energy Optimization for Motorized Spindle System of Machine Tools under Minimum Thermal Effects and Maximum Productivity Constraints

Contact Info

Product

Resources

About