Dynamic Performance Test and Analysis of Spindle System of High Speed Grinding Machine Tools

2012 ◽  
Vol 226-228 ◽  
pp. 720-724
Author(s):  
Miao Xian Guo ◽  
Bei Zhi Li ◽  
Jian Guo Yang
Keyword(s):  
Machine Tool ◽  
Production Process ◽  
High Speed ◽  
Performance Test ◽  
Dynamic Performance ◽  
Rotating Machinery ◽  
Spindle System ◽  
Response Characteristics ◽  
Modal Test ◽  
Grinding Machine

The high speed machine tool spindle plays an important role in machining operations. Based on modal test techniques and rotating machinery signature techniques, the research focused on the test and analysis of the dynamic characteristics of spindle system of high speed grinder. First, an experimental modal analysis (EMA) is performed in the spindle system; then, the frequency response characteristics and the FRFs of the system should be considered. Furthermore, rotating machinery signature techniques are used to analyze the dynamic behavior of the spindle system in process due to the limitation of modal test techniques, and the theoretical proof is given to explain the spindle system order. The results show that it requires the machine tool to avoid the use of vibration-sensitive speed in the production process and the machine production process, especially bearing manufacturing to improve its accuracy.

scholarly journals Development of gear dynamic performance testing machine

2021 ◽  
Vol 12 ◽  
pp. 20
Author(s):  
Ke Li ◽  
Bo Yu ◽  
Zhaoyao Shi ◽  
Zanhui Shu ◽  
Rui Li
Keyword(s):  
High Speed ◽  
Performance Test ◽  
Dynamic Testing ◽  
Mechanical Design ◽  
Dynamic Performance ◽  
External Disturbance ◽  
Testing Machine ◽  
High Stress ◽  
Performance Testing ◽  
Current Application

With the development of gears towards high temperature, high pressure, high speed and high stress, gear measurement, in which only the static geometric accuracy is considered, is unable to meet the current application requirements. While, the low precision and single function gear tester constrains the measurement of gear dynamic performance. For the resolution of this problem, based on the principle of gear system dynamics and several precision mechanical design techniques, a gear dynamic testing machine has been developed, providing new instruments for gear testing. On the basis of research of the principle of dynamic performance test, the primary measurement items of the testing machine have been determined. The measuring principles of each item and the driving and loading form of the testing machine have been examined. The measurement and control system of the testing machine and its corresponding software have been developed. The instrument can not only obtain the static precision index of the gear, but also obtain the dynamic performance index of the gear in variable working conditions. According to the actual test, the uncertainty of instrument is 3.8 μm and the external disturbance caused by the shaft vibration is less than 0.6 μm, which can meet the 5–6 grade precision gear testing requirement.

A dynamic modeling approach for the winding spindle during start-up with a coupled flexible support system

2019 ◽  
Vol 90 (7-8) ◽  
pp. 757-775
Author(s):  
Yongxing Wang ◽  
Lijun Zhang ◽  
Xi Hou ◽  
Jiang Yan ◽  
Shujia Li ◽  
...  
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Dynamic Performance ◽  
Beam Theory ◽  
Filament Winding ◽  
Heavy Load ◽  
Frequency Dependent ◽  
Spindle System ◽  
Start Up ◽  
Deep Groove

A polyester filament winding spindle is the most complex winding rotor system, due to its high speed, heavy load, and frequency-dependent parameters; furthermore, the spindle's rotating speed constantly changes and it is continually crossing the critical speed points. This paper presents an approach to establish the finite element model of the winding spindle to predict its dynamic behavior characteristics during start-up. Firstly, three finite element models of the discrete single component were developed based on the Timoshenko beam theory. The bending, transverse shear effect, and gyroscopic moment were considered in these models. The flexible supporting system, which consists of a deep groove ball bearing and several rubber O-rings, is simplified by a nonlinear spring and damper. Its frequency-dependent dynamic supporting parameters are identified by experiment. Secondly, a fully dynamic model of the polyester winding spindle system, which consists of the cantilever supporting arm, shaft, and sleeve, as well as the flexible and rigid coupling elements, was established. Thirdly, the Newmark method was used to develop a program for solving the dynamic equations of the spindle system in MATLAB®. Based on the model of the spindle system and the computation program, the effects of the supporting stiffness, damping, and start-up time on the spindle's unbalanced response were investigated. The results indicate that the model of the spindle system presented in this paper is suitable for the prediction of the dynamic performance during its start-up.

Research on Machining Simulation of Ultra High-Speed Grinding Machine Tool Based on Web

2010 ◽  
Vol 126-128 ◽  
pp. 77-81
Author(s):  
Wan Shan Wang ◽  
Peng Guan ◽  
Tian Biao Yu
Keyword(s):  
Machine Tool ◽  
Geometric Modeling ◽  
High Speed ◽  
Cnc Machining ◽  
Machining Process ◽  
Machining Simulation ◽  
Ultra High Speed ◽  
Cad Cam ◽  
High Speed Grinding ◽  
Grinding Machine

The future development of the manufacturing is using VR technology to make the machining simulation before the actual machining process made. The machining simulation of Ultra High-speed Grinding Machine Tool is researched in this paper. Firstly, using UG/NX software and VRML, the geometric modeling of machine tool is modeled. Secondly, through using Java and Javascript language, the operation and display of machining process of ultra high-speed grinding are realized. The main technologies include NC codes compiling, collision detection and material removal. Thirdly, the example of machining simulation using virtual ultra high-speed grinding machine tool can be obtained in the paper. Compared to other CNC machining simulation methods, the method in the paper has reality display, rich features, a good man-machine interaction, etc., and it does not rely on expensive CAD/CAM software. The system files generated by the machining simulation have the small size and can be transferred on the network easily.

Finite Element Analysis for Static Behaviour of the CNC Turning Machine Spindle

2014 ◽  
Vol 555 ◽  
pp. 555-560 ◽  
Author(s):  
Doru Bardac ◽  
Constantin Dogariu
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
High Speed ◽  
High Performance ◽  
Element Model ◽  
Design Activity ◽  
Element Analysis ◽  
Spindle System ◽  
Machine Spindle ◽  
Main Spindle

This paper presents a method to investigate the characteristics of a turning high-speed spindle system. The geometric quality of high-precision parts is highly dependent on the performance of the entire machining system,especially by the main spindle behaviour. The machine tool main spindle units is focused on direct driven spindle units for high-speed and high performance cutting. This paper analyzes the static behavior for a turning machine spindle and presents some activities to improve the CAD model for such complex systems. The proposed models take into account the spindle with the detailed bearing system. The analysis was performed during the design activity and was based on Finite Elements Method. Starting from the 3D designed model, using FEM done by means of ANSYS analysis the structure stiffness was evaluated and, by consequence, the influence on the machine tool precision. The aim of this paper is to develop a finite element model of the machine spindle system and to use this method for design optimization. The 3D model was designed using the SolidWorks CAD software. The static analysis was completed by modal, harmonic response and thermal analysis, but their results will be presented in other papers.

An application of Taguchi method on the high-speed motorized spindle system design

2011 ◽  
Vol 225 (9) ◽  
pp. 2198-2205 ◽  
Author(s):  
C-W Lin
Keyword(s):  
Optimal Design ◽  
Taguchi Method ◽  
Machine Tool ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Design Stage ◽  
Original Design ◽  
Spindle System ◽  
Design Engineers ◽  
Design Variables

As spindle speeds increase, the variations caused by high-speed effects become more significant. Therefore, in the initial design stage, it is necessary for machine tool design engineers to construct a robust high-speed machine tool that possesses high first-mode natural frequencies (FMNFs) and is insensitive to high operating speeds. In this article, Taguchi method is used to identify the optimal values of design variables (DVs) for a robust high-speed spindle system with respect to the signal-to-noise ratio (SNR) of system FMNF. The L18 orthogonal array covers seven main DVs at three levels each, one main DV at two levels, and the noise factor spindle speeds at six levels. The results show that the new optimal design has improved the SNR of the FMNF by 2.06 dB from the original design; this implies that the quality loss has been reduced to 62 per cent of its original value. The optimal design has been verified by a confirmation numerical experiment.

scholarly journals Development of High Speed Train Door System for Improving Maintenance

2019 ◽  
Vol 3 (5) ◽  
pp. 1-6
Author(s):  
Keyword(s):  
Production Process ◽  
High Speed ◽  
Performance Test ◽  
Maintenance Cost ◽  
High Speed Train ◽  
Technical Improvement ◽  
Service Parts ◽  
The Right ◽  
Track Test ◽  
Design And Production

The train door of the high speed train currently operation in Korea is consist of 46 train set(1,656 units) and they are all made up of imports. The problem is that it is difficult to service parts at the right time for breakdown or replacement as parts are imported. Moreover, it is difficult to secure service parts when they are discontinued due to characteristics of imported parts, this leads to an increase in overall maintenance cost. As a result, the Korea Railroad Corporation has developed localization of the high speed train door system and currently progress the on-track test to verify reliability. In this paper, the design and production process of development product and result of performance test are summarized. In addition, the technical improvement of the developed product compared to the existing product was confirmed and the method for securing the reliability was considerate.

scholarly journals The Mechanical Properties Analysis of Machine Tool Spindle After Remanufacturing Based on Uncertain Constraints

2015 ◽  
Vol 9 (1) ◽  
pp. 150-155 ◽  
Author(s):  
Ling Liu
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Beam Theory ◽  
Optimized Design ◽  
Cnc Machine ◽  
Element Analysis ◽  
Heavy Load ◽  
Spindle System ◽  
Machine Spindle ◽  
The Cost

In this paper, the CNC machine spindle after remanufacturing is researched as an object on uncertain constraints. At first, the equations of the machine spindle motion based on beam theory are established. This article uses Finite Element Analysis (FEA) function to analyze the remanufacturing of machine spindle system in the free mode and while static and the actual working conditions of multi-modal analysis of the spindle’s constraints state. By analysis it is known that the spindle vibrates and deforms at high speeds, and some assumptions are used to improve the unreasonable parameters, so that the spindle’s dynamic performance is more stable and reliable in the conditions of the high speed and heavy load operation. In addition, simplifying the cost and shortening the design cycle are the part of the analysis. The results provides an optimized design and a basis for precision control for the heavy-duty mechanical spindle system or machine spindle system.

New Development of Supersonic Surface Grinding Machine Tool with a Linear-Motor-Driven Table System

2016 ◽  
Vol 1136 ◽  
pp. 667-672
Author(s):  
Lu Yang ◽  
Yu Can Fu ◽  
Jiu Hua Xu ◽  
Yong Tao Liu
Keyword(s):  
Machine Tool ◽  
High Speed ◽  
High Performance ◽  
Linear Motor ◽  
Grinding Wheel ◽  
Research Activities ◽  
High Speed Grinding ◽  
Grinding Mechanism ◽  
Speed Up ◽  
Grinding Machine

Ultra-high speed grinding (UHSG) is a significant and promising machining technology in grinding hard-to-cut materials. To find out the aerodynamics of the grinding wheel body when the airflow field has subsonic, transonic, and supersonic speed characteristics and clarify the corresponding influence on the grinding mechanism, the study is conducted to develop a supersonic grinding machine tool that is capable of being operated at extreme wheel speed up to 450 m/s and meanwhile accompanying with high grinding capability. In accordance with the main design objectives, a high performance grinding motorized spindle with maximum rotational speed 36000r/min and maximum power 28kW is developed. The linear motor feed driven system is also exploited to satisfy the requirement of maximum reciprocating speed up to 2m/s. Following plenty of specific design and performance analysis works, a prototype of supersonic grinding machine tool is finally developed. In the end, this paper also puts forward a number of further studies and prospective for the research activities on basis of the developed grinder.

The Dynamics Modeling and Simulation of Spindle System of Ultra-High Speed Grinding Machine Tool

2011 ◽  
Vol 175 ◽  
pp. 206-210 ◽  
Author(s):  
Ya Li Hou ◽  
Chang He Li
Keyword(s):  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Performance Optimization ◽  
Matrix Method ◽  
High Speed ◽  
Critical Speed ◽  
Dynamics Modeling ◽  
Spindle System ◽  
Ultra High Speed ◽  
Grinding Machine

This study was focused on the theoretical modeling and numerical simulation about the dynamic characteristics of spindle system of ultra-high speed grinder. Based on the rotor dynamics and structural system dynamics, a dynamic model was established using the transfer matrix method and the overall transfer matrix method. The critical speeds of first three orders, the modes of variation and other dynamic characteristic parameters of the spindle system were analyzed and calculated. The results showed that the working speed of the spindle system is much lower than the primary critical speed and can therefore stay away the resonance range effectively. Furthermore, the span of the fulcrum bearing and the overhang had significant influences on the critical speed within a certain range, and the study provided the basis and guidance for the structural design and performance optimization of the spindle system.

Sign in / Sign up

Export Citation Format

Share Document