scholarly journals Design of Compound Machine Tool for Ultra-Precision Shaft Parts

2020 ◽  
Vol 319 ◽  
pp. 01002
Author(s):  
Zizhou Sun ◽  
Yifan Dai ◽  
Hao Hu ◽  
Chaoliang Guan ◽  
Guipeng Tie ◽  
...  
Keyword(s):  
Machine Tool ◽  
Error Control ◽  
Dynamic Performance ◽  
Cnc Machining ◽  
Element Analysis ◽  
Abrasive Belt ◽  
Performance Requirements ◽  
Belt Polishing ◽  
Ultra Precision ◽  
Control Principle

Ultra-precision shaft components are widely used, such as the shaft core of air-floating spindle, etc. At present, the final precision of such workpieces are difficult to reach through CNC machining tools, but often with the help of manual grinding, of which the machining precision and efficiency are greatly limited. Based on the deterministic figuring method, this paper uses an abrasive belt polishing machine to carry out ultra-precision figuring experiments on shaft parts. On this basis, an ultra-precision composite machine tool for shaft parts is designed with the functions of turning, grinding and abrasive belt polishing. The dynamic performance requirements of the machine tool are put forward by analyzing the precision index of the workpiece and the error control principle of deterministic figuring, and the structure of machine tool is designed and the performance parameters of each part are selected. combined with the finite element analysis, the key components are optimized to meet the machining requirements of 0.1μm roundness and 1μm cylindricity on the steel shaft.

Finite Element Analysis and Optimization of Thermal Deformation of Resin Concrete Manufacturing Bases

2014 ◽  
Vol 543-547 ◽  
pp. 4010-4013
Author(s):  
Yao Chen ◽  
Xiu Xia Liang ◽  
Shuang Qiu
Keyword(s):  
Thermal Stability ◽  
Machine Tool ◽  
Thermal Deformation ◽  
Precision Machining ◽  
Element Analysis ◽  
Excellent Thermal Stability ◽  
Good Thermal Stability ◽  
Machining Center ◽  
Ultra Precision ◽  
Thermal Stability Of

Resin concrete generally has good mechanical properties, excellent thermal stability and great vibration resistance, the model of the ultra-precision machining center bed is established to study the thermal stability of the resin concrete using virtual reality and collaborative simulation technology based on Pro/E and ANSYS Workbench. The main factors that affect the machine tool bed thermal deformation were found through analyzing the deformation results and the materials and restrain conditions were optimized. The results proved that the optimized machine tool bed has good thermal stability and theoretical basis was provided to improve the thermal stability of the ultra-precision machining centers.

A Study on Design of Ultra-Precision Micro-Feed Stage

2006 ◽  
Vol 315-316 ◽  
pp. 131-135
Author(s):  
Q. Zhang ◽  
Ze Sheng Lu
Keyword(s):  
Design Method ◽  
Dynamic Performance ◽  
Design Procedure ◽  
Performance Parameters ◽  
Element Analysis ◽  
Flexure Hinges ◽  
Ultra Precision ◽  
Positioning Technique ◽  
Precision Machines ◽  
Geometrical Dimensions

Ultra-precision positioning technique has become one of the important parts in the development of precision machines. Flexure stage driven by piezoelectric actuator (PZT) has been used widely as micro-feed installation because they have many advantages, such as: driving directly, fine displacement resolution, no friction or spacing. This paper designed a micro-feed stage driven by PZT using clinograph mechanism, analyzed the influence of flexure hinges on the static and dynamic performance of micro-feed stage based on finite element analysis. The design procedure was presented by which we can determine the geometrical dimensions of flexure hinge easily and achieve desired performance parameters of the stage, and the effectiveness of the design method was validated by experiment.

Discuss of Structure and Finite Element Analysis of the Ultrasonic Vibration Turn-Milling Machine Tool

2013 ◽  
Vol 589-590 ◽  
pp. 740-745
Author(s):  
Li Meng Wang ◽  
Xiao Zhou Li ◽  
Jin Kai Xu ◽  
Lin Lin ◽  
Jing Dong Wang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Machine Tool ◽  
Ultrasonic Vibration ◽  
High Speed ◽  
Dynamic Performance ◽  
Milling Machine ◽  
Element Analysis ◽  
Dynamic Performance Analysis ◽  
Turn Milling

In this paper, ultrasonic vibration turn-milling machine tool has been designed based on the analysis of processing principle . CATIA is used to generate three-dimensional solid model for the overall layout structure of high speed miniature lathe, while finite element analysis software is used to achieve dynamic performance analysis, so as to obtain each factorial of machine-tool vibration and natural frequency. The results are important to machine optimization and the construction of experimental prototype, and will guide the next work.

Dynamic design and thermal analysis of an ultra-precision flycutting machine tool

2016 ◽  
Vol 232 (3) ◽  
pp. 404-411 ◽  
Author(s):  
Pingfan Liu ◽  
Wanqun Chen ◽  
Hao Su ◽  
Guoda Chen
Keyword(s):  
Thermal Analysis ◽  
Machine Tool ◽  
Dynamic Performance ◽  
Fluid Structure Interaction ◽  
Interaction Method ◽  
Dynamic Design ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Hydrostatic Bearings ◽  
Ultra Precision

This article presents the dynamic design and thermal analysis of an ultra-precision flycutting machine tool. The hydrostatic bearings are used both in the spindle and slide to ensure the stiffness of the machine tool. The fluid–structure interaction method is used to obtain the actual clearance changes of the hydrostatic bearing. The dynamic and thermal performances of the machine tool are analyzed considering the effect of hydrostatic bearings. The influence of the thermal effect on the static and dynamic performance of the machine tool is further studied. The prototype machine tool is built. Preliminary machining trials have been carried out and provided evidence of fluid–structure interaction method being helpful to design the ultra-precision machine tool based on the hydrostatic technology.

scholarly journals Development of a vibration free machine structure for high-speed micro-milling center

2021 ◽  
Author(s):  
Arnab Das ◽  
Shashank Shukla ◽  
Mohan Kumar ◽  
Chitransh Singh ◽  
Madan Lal Chandravanshi ◽  
...  
Keyword(s):  
Machine Tool ◽  
Surface Finish ◽  
Machine Tools ◽  
High Speed ◽  
Micro Milling ◽  
High Speed Machining ◽  
Element Analysis ◽  
Dimensional Precision ◽  
Ultra Precision ◽  
Machine Structure

Abstract The demand of ultra-precision micro-machine tools is growing day by day due to exigent requirements of miniaturized components. High accuracy, good dimensional precision and smooth surface finish are the major characteristics of these ultra-precision machine tools. High-speed machining has been adopted to increase the productivity using high-speed spindles. However, machine tool vibration is a major issue in high-speed machining. Vibration significantly deteriorates the quality of micro-machining in terms of dimensional precision and surface finish. This paper describes a design methodology of a closed type machine structure for vibration minimization of a high-speed micro-milling center. The rigid machine structure has provided plenty of stiffness and the damping capability to the machine tool without utilizing vibration absorbers . The models of the machine structures have been generated and assembled in AutoCAD 3D . The performances of the integrated micro-milling machine tools were determined by finite element analysis. The best model has been selected and proposed for manufacturing. Additionally, simulation results were validated by comparing with experimental results. Eventually, after manufacturing and assembly, experiments have been performed and determined that the amplitude of vibration was approaching towards nanometer level throughout the working range of the high-speed spindle. The machine tool was capable to fabricate miniaturized components with fine surface finish.

Investigation on dynamic performance of ultra-precision flycutting machine tool based on virtual material method

2021 ◽  
pp. 095440542199013
Author(s):  
Chenhui An ◽  
Ruocheng Wei ◽  
Zhenzhong Wang ◽  
Qiao Xu ◽  
Xiangyang Lei ◽  
...  
Keyword(s):  
Machine Tool ◽  
Dynamic Performance ◽  
Material Model ◽  
Average Error ◽  
Machined Surface ◽  
Actual Structure ◽  
Ultra Precision ◽  
Processing Accuracy ◽  
The One ◽  
Fifth Order

In the field of ultra-precision machining, the dynamic performance of ultra-precision equipment contributes a lot to the processing accuracy. In this paper, in order to study the dynamic performance of the flycutting machine tool, the virtual material method was adopted creatively to build a machine tool model. This method overcame the complexity of actual structure and obtained more accurate results than traditional methods. Subsequently, the finite element method was applied to analyze the dynamic performance of the virtual material model. Furthermore, the modal test for the flycutting machine tool was performed to verified the simulations by means of the one-point hitting and multi-point measurement. The simulation results indicate that the virtual material model has high comprehensive accuracy, of which the average error of natural frequency is 5.9% and errors are all less than 6% excepting the first order. Moreover, combined with the flycutting experiments, it can be found that the fifth order mode of machine tool contributes a lot to processing quality, which leads to the waviness of 53 mm on the machined surface directly because of the weak stiffness of beam-column joints. By increasing the stiffness of the key joints, the waviness can be eliminated, which greatly improves the surface quality of the workpiece.

Forming of Microstructure on Hard Brittle Materials in Ductile Mode Cutting

2010 ◽  
Vol 447-448 ◽  
pp. 91-95 ◽  
Author(s):  
Kunitaka Kuriyama ◽  
Masahiko Fukuta ◽  
Katsuhiko Sekiya ◽  
Keiji Yamada ◽  
Yasuo Yamane
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Dynamic Performance ◽  
Brittle Materials ◽  
Value Added ◽  
Precision Machine ◽  
Ductile Mode ◽  
Ductile Mode Cutting ◽  
Ultra Precision ◽  
Precision Machine Tools

The requirement of the ultra-precision machine tools for ductile cutting of hard brittle materials was examined experimentally. One of the essential factors of achieving ductile mode cutting was not only high-resolution feedback control but also the dynamic performance of the machine tool in forming solid immersion lens of monocrystalline silicon. We also proposed newly developed method for ultra-precision machine tools, which does not have enough high dynamic performance in order to achieve ductile mode cutting of the hard brittle materials. An additional device consisted of air slider on the machine tool was applied to cutting of glass in order to keep stable ductile mode cutting. We fabricated high-value added structure, which are designed a diffraction grating, consisted of micro groove on a borosilicate crown glass surface with the developed device.

Finite Element Analysis and Structure Optimization of Machine Tool Worktable

2011 ◽  
Vol 80-81 ◽  
pp. 985-989 ◽  
Author(s):  
Dong Qiang Gao ◽  
Fei Zhang ◽  
Zhi Yun Mao ◽  
Huan Lin ◽  
Jiang Miao Yi
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Original Structure ◽  
High Speed Machining ◽  
Element Analysis ◽  
Performance Requirements ◽  
Machining Center ◽  
Static Performance ◽  
Overall Performance ◽  
Ansys Workbench

DVG850 high-speed machining center worktable is taken as research object, in order to meet the overall performance requirements of the high-speed machining center, 3D model of worktable is established in SolidWorks. Static analysis and modal analysis are carried out in ANSYS Workbench, and then the worktable is optimized in topology optimization module of ANSYS Workbench. According with the analysis results, the worktable structure has improved. The improved worktable keeps the original’s static performance, and enhances the dynamic performance; however, its quality is lighter than original structure by 23.2 kg.

The Dynamic Finite Element Analysis of Table of VM1000 CNC Machining Center

2010 ◽  
Vol 136 ◽  
pp. 231-235
Author(s):  
Fei Hong Yin
Keyword(s):  
Dynamic Performance ◽  
Three Dimensional ◽  
Cnc Machining ◽  
Frame Structure ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis ◽  
Machining Center ◽  
Cnc Machining Center

The table of VM1000 CNC machining center is a box-frame structure with ribbed plate. The three-dimensional model of table based on Pro/E was built, the modal analysis and related experiments of table was completed by software of ANSYS, The dynamic performance parameter of the table is obtained, and the analysis results indicate that the design of table is available; it can be applied in practice.

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