Vibration and Noise Monitoring of Ceramic Motorized Spindles

2011 ◽  
Vol 291-294 ◽  
pp. 2076-2080 ◽  
Author(s):  
Li Xiu Zhang ◽  
Yu Hou Wu
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
High Strength ◽  
Major Elements ◽  
Motorized Spindle ◽  
High Productivity ◽  
Rotating Speed ◽  
Engineering Ceramic ◽  
Lubrication Condition ◽  
Motorized Spindles

High speed machining (HSM) technology is used in a broad range of applications to machine ferrous metals and nonmetallic material. The motorized spindle is one of the major elements to keep the machine running at high productivity. In recently years, the requirement of rotational speed and rigidity of motorized spindle is getting higher and higher in order to satisfy the high speed processing. Engineering ceramic is the ideal material for high-speed and high precision electrical spindle due to perfect characteristics of light weight, wear resistance, high temperature, high strength, and so on. So a ceramic motorized spindle is designed for higher speed and rigidity. The shaft and bearing of the motorized spindle are made from ceramic material and other parts are made from metal. Rated power of this electrical spindle is 15Kw; its torque is 14Nm and revolving speed is up to 30,000 rpm as maximum. Motorized spindle is a typical mechatronics product and its dynamic property is very important. The signal of vibration and noise of motorized spindle may display its running status, so the vibration and noise of motorized spindle is an important index in the dynamic performance. This paper monitors the vibration and noise of ceramic motorized spindles using spectral analysis techniques. The effects of rotating speed and lubrication condition on vibration and noise of the ceramic electrical spindle are analyzed. These results are very helpful to the structure optimization and application of the ceramic motorized spindle.

Analysis on the Influence of Vibration Performance of Air-Gap of Ceramic Motorized Spindle

2011 ◽  
Vol 335-336 ◽  
pp. 547-551 ◽  
Author(s):  
Li Xiu Zhang ◽  
Yu Hou Wu ◽  
Li Yan Wang
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
High Strength ◽  
Air Gap ◽  
Motorized Spindle ◽  
Effect Change ◽  
Rotating Speed ◽  
Engineering Ceramic ◽  
Vibration Performance ◽  
The Ideal

Engineering ceramic is the ideal material for high-speed and high precision motorized spindle due to perfect characteristics of light weight, wear resistance, high temperature, high strength, and so on. The air-gap is changed due to the influence from various factors not only the tolerance of the manufacture and assembly of motorized spindle but also different working condition. The change of air-gap impacts on vibration performance of motorized spindle. The effects of rotating speed and air-gap between the rotator and stator on these characteristic parameters of the motorized spindle are analyzed. This paper analyses the effect change of air-gap on vibration performance of motorized spindle by the simulation analysis and experimental. The results show that vibration increase with the decrease of air-gap. Meanwhile, electromagnetic vibration increase with the increase of eccentricity of motorized spindle. These results are very helpful to the structure optimization and application of the ceramic motorized spindle.

Thermal Characters of the Air-Cooled High Speed Motorized Spindle for Wood-Working Machine

2013 ◽  
Vol 579-580 ◽  
pp. 568-572
Author(s):  
Da Guo Ma ◽  
Xin Bo Jiang
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Heat Dissipation ◽  
Element Model ◽  
Structure Design ◽  
Air Cooling ◽  
Heat Sources ◽  
Motorized Spindle ◽  
Dissipation Structure ◽  
Motorized Spindles

The structure and composition of the air-cooled high speed motorized spindle for wood-working machine and some features relative to the metal cutting motorized spindle are introduced briefly. Then the main heat sources and heat dissipation mechanism of the air-cooled motorized spindle are thoroughly analyzed, finite element model of the air-cooled motorized spindle is built, the motorized spindles temperature distribution under thermal steady state and the influence of speed are analyzed. The results show that air cooling relative to the water or oil cooling has many advantages and reasonable heat dissipation structure design of air-cooled motorized spindle could meet the requirements of the high-speed motorized spindle for wood-working machine.

scholarly journals Dynamic Modelling and Analysis of the Microsegment Gear

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Yangshou Xiong ◽  
Kang Huang ◽  
Tao Wang ◽  
Qi Chen ◽  
Rui Xu
Keyword(s):  
High Speed ◽  
Load Capacity ◽  
Dynamic Performance ◽  
Dynamic Modelling ◽  
Weight Ratio ◽  
Load Condition ◽  
Main Idea ◽  
Heavy Load ◽  
Rotating Speed ◽  
Involute Gear

The development of technology requires higher load capacity, rotating speed, power-weight ratio, lower vibration, and noise with respect to the gear transmission. The new type microsegment gear’s tooth profile curve is composed of many microsegments. Previous researches indicate that the microsegment gear has a good static performance, while the dynamic behavior of the microsegment gear has never been investigated. This paper will focus on the dynamic performance of the gear. The profile deviation between microsegment gear and involute gear is regarded as a displacement excitation in the proposed dynamic model. The numerical analysis for three cases is conducted and the results shows that, in low-speed and heavy-load, medium-speed and medium-load conditions, microsegment gear and involute gear both exhibit a good performance, while, in high-speed and heavy-load condition, microsegment gear has a better performance than that of involute gear. The influence of backlash on the dynamic performance is also studied. It is found that the variation of backlash does not change the type of motion, but the vibration amplitude and the stability of the motion are much affected. The main idea in this paper is supposed to provide a novel method for the precision grinding of the microsegment gear.

Simulation and Experimental Investigation of Stiffness of the High Acceleration Linear Feed Drives

2010 ◽  
Vol 97-101 ◽  
pp. 3113-3119
Author(s):  
Ping Ma ◽  
Cheng Xiang Liao ◽  
Zhen Hui Chen ◽  
Gong Zhen
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Great Influence ◽  
Linear Motor ◽  
Current Loop ◽  
Linear Induction Motor ◽  
Feed Drive ◽  
Feed Drives ◽  
High Acceleration ◽  
Motorized Spindles

In high speed machining, the feed drives with high velocity and high acceleration are necessary to make full use of the capacities of the high speed motorized spindles. The linear motor feed drive eliminates any mid- transmitting mechanism, which cause achieved the high acceleration. In this paper, the GD-Ⅲ linear induction motor feed drive is introduced, and its controller is modeled and its stiffness has been investigated with simulation program MATLAB & SIMULINK. The influence of the parameters of the controller on the dynamic performance has also been analyzed. The simulation shows that the positional loop proportional gain kv, velocity proportional gain kp, velocity loop integral time constant Tn and the current loop proportional gain kpi have great influence on the dynamics of the linear motor feed drive. In the end, the simulation is verified by the experimental results.

scholarly journals Measurement Research of Motorized Spindle Dynamic Stiffness under High Speed Rotating

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Xiaopeng Wang ◽  
Yuzhu Guo ◽  
Tianning Chen
Keyword(s):  
High Speed ◽  
Production Efficiency ◽  
Dynamic Stiffness ◽  
Damping Ratio ◽  
Dynamic Performance ◽  
Machining Accuracy ◽  
Motorized Spindle ◽  
Response Curves ◽  
Tool Technology ◽  
High Speed Machine

High speed motorized spindle has become a key functional unit of high speed machine tools and effectively promotes the development of machine tool technology. The development of higher speed and more power puts forward the stricter requirement for the performance of motorized spindle, especially the dynamic performance which affects the machining accuracy, reliability, and production efficiency. To overcome the problems of ineffective loading and dynamic performance measurement of motorized spindle, a noncontact electromagnetic loading device is developed. The cutting load can be simulated by using electromagnetic force. A new method of measuring force by force sensors is presented, and the steady and transient loading force could be measured exactly. After the high speed machine spindle is tested, the frequency response curves of the spindle relative to machine table are collected at 0~12000 rpm; then the relationships between stiffness and speeds as well as between damping ratio and speeds are obtained. The result shows that not only the static and dynamic stiffness but also the damping ratio declined with the increase of speed.

A dynamic loading system for high-speed motorized spindle with magnetorheological fluid

2018 ◽  
Vol 29 (13) ◽  
pp. 2754-2765 ◽  
Author(s):  
Shengli Tian ◽  
Xiaoan Chen ◽  
Ye He ◽  
Tianchi Chen ◽  
Peiming Li
Keyword(s):  
Dynamic Loading ◽  
High Speed ◽  
Dynamic Performance ◽  
Temperature Stability ◽  
Magnetorheological Fluid ◽  
Experimental Results ◽  
Motorized Spindle ◽  
Loading Test ◽  
Linear Relationships ◽  
Loading System

A high-speed dynamic loading test is a key step when testing the dynamic performance and running quality of a high-speed motorized spindle. A loading test is very difficult to perform at high speeds. Based on the rheological behavior of the magnetorheological fluid, a novel high-speed dynamic loading system for a high-speed motorized spindle was designed, fabricated, and tested. The working principles and structure of this loading system are described. The torque model of the loader was derived based on the Herschel–Bulkley model and electromagnetic simulation using the finite element method. In addition, the torque–current relationship under different speeds was analyzed by experiments, and we found non-linear relationships between the viscosity and shear stress of the magnetorheological fluid with the shear rate. The Herschel–Bulkley model was corrected by fitting for the experimental results. The loading torque, calculated by the modified model, complied with the experimental results. This lays the foundation for the design of a high-speed transmission device based on the magnetorheological shear principle. Experiments of torque stability, temperature stability, and reusability verified the feasibility and accuracy of the proposed loading system. It provides a novel method to test the dynamic loading performance of high-speed motorized spindles.

High-Speed Motorized Spindle Decoupling Optimization Control

2014 ◽  
Vol 1039 ◽  
pp. 368-375
Author(s):  
Chi Lan Cai ◽  
Ya Fei He ◽  
Ning Li ◽  
Qing Zhi Lin
Keyword(s):  
Motor Control ◽  
System Performance ◽  
High Speed ◽  
Dynamic Performance ◽  
Optimization Method ◽  
Motorized Spindle ◽  
Root Cause ◽  
Optimization Control ◽  
Motor Control System ◽  
Vibration Noise

High-speed motorized spindle is the core component of the CNC machines. Its dynamic performance directly affects the accuracy of the geometry, and be the root cause of vibration, noise and temperature increase, etc. Its motor control system has the characteristics of nonlinear and strong coupling, which is one of the key R&D items of the spindle design. Based on granular computing, this paper selects the appropriate granularity to analyze the coupling between the motor control parameters and system performance, and propose a zoning decoupling and optimization method to optimize the overall system performance, which has practical application value.

Analysis about Vibration and Noise of Ceramic Electrical Spindle

2011 ◽  
Vol 189-193 ◽  
pp. 1696-1699 ◽  
Author(s):  
Yu Hou Wu ◽  
Li Xiu Zhang
Keyword(s):  
High Speed ◽  
Tetragonal Zirconia ◽  
Major Elements ◽  
High Speed Machining ◽  
Ball Bearings ◽  
High Productivity ◽  
Spindle Shaft ◽  
Ferrous Metals ◽  
High Speed Grinding ◽  
Tetragonal Zirconia Polycrystal

High speed machining (HSM) technology is used in a broad range of applications to machine ferrous metals and nonmetallic material. The electrical spindle is one of the major elements to keep the machine running at high productivity. In recently years, the requirement of rotational speed and rigidity of electrical spindle is getting higher and higher in order to satisfy the high speed processing. So a high speed grinding electrical spindle equipped with hot isostatic pressed silicon nitride (HIPSN) fully-ceramic ball bearings without inner rings and yttria partially stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic spindle shaft is designed for higher speed and rigidity. Because the processing precision is relevant to the vibration of electrical spindle, it is necessary the vibration and noise of the ceramic electrical spindle is detected. This paper presents results of vibration and noise of the ceramic electrical spindle and analysis the reason of phenomenon. The analysis shows the vibration and noise of the ceramic electrical spindle is up to the standard.

Stability of High Speed Milling Based on Instantaneous Cutting Force

2012 ◽  
Vol 152-154 ◽  
pp. 404-408
Author(s):  
Hong Liang Zhou ◽  
Wei Xiao Tang ◽  
Qing Hua Song
Keyword(s):  
Cutting Force ◽  
High Speed ◽  
End Milling ◽  
Element Model ◽  
Face Milling ◽  
Force Model ◽  
Dynamics Model ◽  
High Speed Milling ◽  
High Productivity ◽  
Rotating Speed

High-speed milling (HSM) has advantages in high productivity high precision and low production cost. Thus it can be widely used in the manufacture industry. However, when the speed of spindle-tool reaches a higher speed range, the gyroscopic effect will become an important part of its stable milling. In this paper, a dynamics model of HSM system was proposed considering the influence of gyroscopic moment due to high rotating speed of end milling. Finite element model (FEM) is used to model the dynamics of a spindle-milling system. It obtains the trajectory of central point in face milling with considering gyroscopic effects through the dynamics model at high speeds. Then the cutting force model will be corrected by the trajectory of face milling. Then the stability lobes diagrams (SLD) was elaborated. Cutting thickness effects have non-negligible impact on stability limitation.

Fabrication of High-Strength Aligned Multi-Walled Carbon Nanotubes/ Polyvinyl Alcohol Composite Nanofibers by Electrospinning

2013 ◽  
Vol 796 ◽  
pp. 311-316 ◽  
Author(s):  
Xian Hua Zhang ◽  
Hua Gen Dai ◽  
Ying Cao
Keyword(s):  
Carbon Nanotubes ◽  
High Speed ◽  
Electrospun Nanofibers ◽  
High Strength ◽  
Ammonium Persulfate ◽  
Water Soluble ◽  
Rotating Speed ◽  
Sem Image ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

High-strength uniaxially-aligned electrospun nanofibers were prepared from PVA reinforced by modified hydrophilic multi-walled carbon nanotubes (MWCNTs). In order to get a homogeneous spinning solution, a one-step process using ammonium persulfate (APS) as oxidant was employed to fabricate water-soluble MWCNTs, and then they were dispersed in a 10 wt% PVA aqueous solution. We utilized this macroscopically homogeneous dispersion to produce nanofibers mat by electrospinning with an ultra-high-speed rotating cylinder as a collector. SEM image shows that the aligned degree of the fibers increases along with the increase in rotating speed. When the speed is up to 2000 rpm, the electrospun nanofibers are nearly uniaxially aligned. The tensile test results suggest that a small amount of MWCNTs dramatically enhanced the tensile strength of PVA fibers.

Sign in / Sign up

Export Citation Format

Share Document