Effect of tilting angle on the dynamics of tilting table driven by worm and worm wheel

Wei, Wenming; Zhang, Jun; Lu, Dun; Zhao, Wanhua

doi:10.1177/0954406214549786

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…Basically, the static and dynamic characteristics of a rotary module are greatly affected by the torsional rigidity of the feeding drive mechanism [15]. Wei et al [16] As known, compact milling machines offer advantages in terms of space efficiency and costeffectiveness. Despite their smaller size, they are capable of delivering machining performance comparable to medium-sized machines.…”

Section: Introductionmentioning

confidence: 99%

Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine

Lin,

Xiao,

Lin

et al. 2024

Adv. Sci. Technol. Res. J.

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This study was aimed to develop a dual-axis rotary table for small and medium-sized five-axis milling machines. The rotation and tilting axis of swivel table were respectively driven by servo motor with gear reducer to achieve low speed, high torque, high rigidity and high precision machining capability. Essentially, the dynamic interaction between the workpiece and the cutter in the cutting process is an important factor that affects the machining performance, which also implies that the structural characteristics of the rotary table with the tilting angle will affect the cutting performance of the five-axis machine. Therefore, at the design stage of a five-axis machine tool, it is a prerequisite to evaluate change of dynamic characteristics of the rotary module within the desired feeding range. To this purpose, this study employed the finite element method to analyze the dynamic characteristics of the rotary table under different configurations. In order to evaluate the application feasibility of the dual-axis module on a milling machine, ISO S-shaped machining tests were carried out. Meanwhile, considering the influence of machining vibration on the surface quality of the work piece, the vibration induced at spindle tool and rotary table were assessed for comparisons and used to evaluate their variations with the milling cycles. Based on various experimental results, it is confirmed that the proposed dual-axis rotary table has good structural dynamic characteristics with stable vibration features during a small batch production tests. Current results clearly demonstrate the potential and capability of the proposed dual-axis rotary table in practical application and commercialization.

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Section: Introductionmentioning

confidence: 99%

Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine

Lin,

Xiao,

Lin

et al. 2024

Adv. Sci. Technol. Res. J.

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“…Zhang et al 26 studied the effect of varying stiffness of kinematic joints with different feed rates on dynamics of the high-speed ball screw system. Wei et al 27 discussed that the varying joint stiffness of the worm and worm wheel at different tilting angles caused the different dynamics of the tilting table. Wang et al 28 analyzed the effect of axis coupling force on the stiffness changes of kinematic joints and the varying dynamic behavior of a three-axis gantry milling machine.…”

Section: Introductionmentioning

confidence: 99%

A parametric modeling method for the pose-dependent dynamics of bi-rotary milling head

Zhang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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Bi-rotary milling head is one of the core components of five-axis machining center, and its dynamic characteristics directly affect the machining stability and accuracy. During the sculptured surface machining, the bi-rotary milling head exhibits varying dynamics in various machining postures. To facilitate rapid evaluation of the dynamic behavior of the birotary milling head within the whole workspace, this article presents a method for parametrically establishing dynamic equation at different postures. The rotating and swing shafts are treated as rigid bodies. The varying stiffness of the flexible joints (such as bearings and hirth coupling) affected by gravity and cutting force at different swing angles is analyzed and then a multi-rigid-body dynamic model of the bi-rotary milling head considering the pose-varying joint stiffness is established. The Lagrangian method is employed to deduce the parametric dynamic equation with posture parameters. The static stiffness, natural frequencies and frequency response functions at different postures are simulated using the parametric equation and verified by the impact testing experiments. The theoretical and experimental results show that the dynamics of the bi-rotary milling head vary with the machining postures, and the proposed method can be used for efficient and accurate evaluation of the pose-dependent dynamics at the design stage.

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A review on positioning uncertainty in motion control for machine tool feed drives

Quan,

Zhao

2024

Precision Engineering

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Effect of tilting angle on the dynamics of tilting table driven by worm and worm wheel

Cited by 3 publications

References 24 publications

Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine

Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine

A parametric modeling method for the pose-dependent dynamics of bi-rotary milling head

A review on positioning uncertainty in motion control for machine tool feed drives

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