Non-Abrasive Cryogenic Polishing Device on Cylindrical Surface Based on Recurdyn Dynamic Simulation

2011 ◽  
Vol 418-420 ◽  
pp. 861-864
Author(s):  
Tian Zhu Liang ◽  
Shou Ping Qu
Keyword(s):  
Machine Tool ◽  
Dynamic Simulation ◽  
Rotational Speed ◽  
Cylindrical Surface ◽  
Smooth Surface ◽  
3D Model ◽  
Precision Machine ◽  
Machine Tool Spindle ◽  
Aero Engine ◽  
Ultra Precision

With the increasing rotational speed of the aero-engine shaft and ultra-precision machine tool spindles, there has been the machine tool spindle with ten thousand Rpm. It demands that the spindles should have high rotational accuracy and ultra-smooth surface. In this paper, it takes use of the new ice tool polishing technology to polish metal cylindrical surfaces. The 3D model has been designed. And also the model has been analyzed by Recurdyn software. It verified that the experiment is feasible and effective.

scholarly journals Dynamic Accuracy Design Method of Ultra-precision Machine Tool

2018 ◽  
Vol 31 (1) ◽  
Author(s):  
Guo-Da Chen ◽  
Ya-Zhou Sun ◽  
Fei-Hu Zhang ◽  
Li-Hua Lu ◽  
Wan-Qun Chen ◽  
...  
Keyword(s):  
Machine Tool ◽  
Design Method ◽  
Dynamic Accuracy ◽  
Precision Machine ◽  
Ultra Precision

On-Machine Metrology System Using Confocal Chromatic Probe and Motion Error Correction for Ultra-Precision Machine Tool

2020 ◽  
Author(s):  
Hao Duan ◽  
Shinya Morita ◽  
Takuya Hosobata ◽  
Masahiro Takeda ◽  
Yutaka Yamagata
Keyword(s):  
Machine Tool ◽  
Free Form ◽  
Reference Curve ◽  
Optical Surface ◽  
Motion Error ◽  
Precision Machine ◽  
Ultra Precision ◽  
Axis Position ◽  
Form Deviation ◽  
Accuracy And Repeatability

Abstract Aspherical or free-form optical surface machining using an ultra-precision machine tool is a common and effective method in precision optics manufacturing. However, this method sometimes causes waviness due to the machine’s motion in mid-spatial frequency (MSF) form deviations. This waviness lowers the quality of the optical surface. To address this problem, we use the waviness of the axial displacement of the ultra-precision machine tool. The waviness is obtained by a non-contact on-machine metrology (OMM) system that measures an optical flat as a correction reference curve, which is used to correct the surface of the workpiece to reduce the effect of waviness in advance. The OMM system consists of a displacement probe and a machine tool axis position capture device. The probe system uses a confocal chromatic probe on an ultra-precision machine tool to evaluate the form deviation of the workpiece with 1 nm resolution. The axis position capture system uses a signal branch circuit of linear scale on each axis from the ultra-precision machine tool. The OMM system is tested in terms of accuracy and repeatability. In comparison to the results of the shaper cutting of an oxygen-free copper (OFC) workpiece with feed-forward correction, we were able to reduce the profile error from 125.3 nm to 42.1 nm in p-v (peak to valley) and eventually also reduced the waviness.

Design of Fluid Drive Spindle and Its Rotational Speed Control

2007 ◽  
Author(s):  
Yohichi Nakao ◽  
Masanori Ishikawa
Keyword(s):  
Machine Tool ◽  
Mathematical Models ◽  
Rotational Speed ◽  
Feedback Controller ◽  
Diamond Cutting ◽  
Servo Valve ◽  
Ultra Precision ◽  
Rotational Speed Control ◽  
Rotational Direction ◽  
Cutting Experiments

Water drive spindle has been developed as a spindle for ultra-precision machine tool. Performances of the water drive spindle were evaluated by experiments and simulations. In addition, the spindle was applied to diamond cutting experiments, then, successfully the fine mirrored surfaces were finished. However, rotational direction of the water drive spindle is limited, which is due to the structure of the spindle. Thus, development of water drive spindle that is capable of rotating spindle rotor for both rotational directions is current our objective. In advance of developing the water drive spindle, fluid drive spindle that is similar structure with the water drive spindle, is designed and tested in the present paper. Furthermore, control performances of the fluid drive spindle are studied through simulations. Linearized mathematical models of the fluid drive spindle and servo valve are introduced, then, they are used for the simulations. It is verified that the developed fluid drive spindle is able to rotate for both rotational directions and the spindle speed can be controlled by designed feedback controller.

Quadrant Protrusion Measurement of Ultra-Precision Machine Tool by Real-Time Position Capturing Method

2016 ◽  
Vol 874 ◽  
pp. 531-536 ◽  
Author(s):  
Hao Duan ◽  
Takuya Hosobata ◽  
Masahiro Takeda ◽  
Shinya MORITA ◽  
Yutaka Yamagata
Keyword(s):  
Machine Tool ◽  
Real Time ◽  
Data Storage ◽  
Optical Element ◽  
Linear Interpolation ◽  
Precision Machine ◽  
Control Code ◽  
Ultra Precision ◽  
Time Position ◽  
Circular Interpolation

This paper describes a development of a real-time position capturing method in which branched encoder signals are recorded in external data storage, to evaluate motion trajectories of the XYZ table on ultra-precision machine tool. The method allows the capturing with minimal modification to the machine: without any additional sensors. In the previous study we generated a non-axisymmetric aspherical optical element by XZC-axis simultaneous numerical controlled ultra-precision turning process with 2 μm form deviation, the reason of form accuracy degradation wasn’t identified. Using the developed system, motion accuracy of ultra-precision machine tool is confirmed. The machine tool moves along circular trajectory in three coordinate planes (XY, YZ and ZX) respectively. The rotation direction of circle is set clock wise and counter clock wise. The circle processing interpolation command by linear interpolation control code and circular interpolation control code. The results showed the effectiveness of the proposed method for performance evaluations of machine tools, by revealing the influence of trajectory parameters on the magnitudes of quadrant protrusions.

An expert system for hydro/aero-static spindle design used in ultra precision machine tool

2014 ◽  
Vol 30 (2) ◽  
pp. 107-113 ◽  
Author(s):  
Yingchun Liang ◽  
Wanqun Chen ◽  
Yazhou Sun ◽  
Nan Yu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Expert System ◽  
Machine Tool ◽  
Precision Machine ◽  
Ultra Precision
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