Theoretical Analysis of Rotational Accuracy for Rolling Bearings used in Machine Tools

2002 ◽  
Vol 2002.4 (0) ◽  
pp. 245-246
Author(s):  
Shoji NOGUCHI
Keyword(s):  
Theoretical Analysis ◽  
Machine Tools ◽  
Rolling Bearings

Reliability Analysis about A/C-Axis of Woodworking Five-Axis Milling Head

2014 ◽  
Vol 635-637 ◽  
pp. 407-410
Author(s):  
Shuang Yong Wang ◽  
Wei Zhang ◽  
Qian Wei Zhang ◽  
Jian Hua Yang ◽  
Peng Fei Zhang
Keyword(s):  
Theoretical Analysis ◽  
Reliability Analysis ◽  
Machine Tools ◽  
Theoretical Basis ◽  
Cnc Machine Tools ◽  
Machining Accuracy ◽  
Cnc Machine ◽  
Core Feature ◽  
Drive Motor ◽  
Five Axis

As a core feature of high-end CNC machine tools, the torque carrying performance of five-axis milling head directly affects the machining accuracy and reliability. Through theoretical analysis and derivation, combining experimental prototype, the A/C-axis cutting torque formula of five-axis milling head on woodworking is obtained. The reliability analysis provides a theoretical basis for drive motor selection and five-axis milling head structural optimization and improvement.

scholarly journals Theoretical Analysis of Circular Interpolation Contouring Error at Quadrant Changing Position in NC Machine Tools.

2001 ◽  
Vol 67 (1) ◽  
pp. 152-156 ◽  
Author(s):  
Jun FUJITA ◽  
Sadaji HAYAMA ◽  
Minoru HAMAMURA ◽  
Kazuhiro SHIBA ◽  
Yoshiaki KAKINO ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Machine Tools ◽  
Contouring Error ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Circular Interpolation

scholarly journals Uncertainties in Heat Loss Models of Rolling Bearings of Machine Tools

Procedia CIRP ◽  
2016 ◽  
Vol 46 ◽  
pp. 107-110 ◽  
Author(s):  
Bernd Kauschinger ◽  
Steffen Schroeder
Keyword(s):  
Heat Loss ◽  
Machine Tools ◽  
Rolling Bearings ◽  
Loss Models

Analysis of Kinematic Motion Deviations of Rotary Tables Based on Geometric Tolerances

2012 ◽  
Author(s):  
Nobuhiro Sugimura ◽  
Hitomi Watabiki ◽  
Wiroj Thasana ◽  
Koji Iwamura ◽  
Yoshitaka Tanimizu
Keyword(s):  
Theoretical Analysis ◽  
Machine Tool ◽  
Mathematical Models ◽  
Product Quality ◽  
Machine Tools ◽  
Manufacturing Systems ◽  
Machining Accuracy ◽  
Geometric Tolerances ◽  
Kinematic Motion ◽  
Made In

Machine tools are recognized as key components of manufacturing systems, and product quality and cost mainly depend on performances of the machine tools. Much progress has been made in the machine tool technologies, aimed at improving the performances of the machine tools from various viewpoints, such as accuracy, reliability, productivity, and flexibility. The machining accuracy is one of the most important characteristics of the machine tools. From the viewpoints of the design and the manufacturing of the machine tools and their components, one of the important issues is to clarify the relationships between the kinematic motion deviations of the machine tools and the geometric tolerances of the components, such as the guide ways and the bearings. The objective of the present research is to establish mathematical models representing the kinematic motion deviations of the machine tools, on the basis of the geometric tolerances of the components, and to apply the models to theoretical analysis of the kinematic motion deviations of the machine tool components.

Study on Dynamic Performance of Linear Direct Drive Based on Pole Placement

2012 ◽  
Vol 215-216 ◽  
pp. 926-929 ◽  
Author(s):  
Chao Pan ◽  
Jian Min Zuo ◽  
Mu Lan Wang
Keyword(s):  
Theoretical Analysis ◽  
Disturbance Rejection ◽  
Machine Tools ◽  
Dynamic Performance ◽  
Parameter Variation ◽  
Pole Placement ◽  
Direct Drive ◽  
Synchronous Motors ◽  
Linear Synchronous Motors ◽  
Force Ripple

Permanent magnet linear synchronous motors (PMLSM) can serve as direct drive actuators for machine tools. However, PMLSM is more easily affected by load disturbance, force ripple and parameter variation. As a result, the design of an appropriate controller and research on dynamic performance are very important for PMLSM. In this paper, a feedback controller based on pole-placement is proposed to achieve desired tracking performance. The effectiveness and feasibility of the proposed method are demonstrated through theoretical analysis. The dynamic response and disturbance rejection ability for linear servo system were researched and the parameters which influence the dynamic performance of the system were discussed.

Rotation of a Clamped Spherical Ball due to Linear Reciprocating Motion

1996 ◽  
Vol 63 (3) ◽  
pp. 683-691 ◽  
Author(s):  
E. S. Edelstein ◽  
J. J. Blech
Keyword(s):  
Theoretical Analysis ◽  
Ball Bearing ◽  
Natural Frequencies ◽  
Theoretical Explanation ◽  
Reciprocating Motion ◽  
Rolling Bearings ◽  
Stick Slip ◽  
Spherical Ball ◽  
Clamping System ◽  
Slip Motion

A perfect spherical ball, symmetrically clamped between two identical surfaces, was found to rotate due to linear reciprocating excitation. A plausible theoretical explanation of this phenomenon follows. The rotation of the ball is a combination of the magnification of the dynamic response of the ball in the clamping system, near its natural frequencies, with frictional stick-slip at the contact areas. The ball rotates when the system is excited by a reciprocating motion not collinear with the preloading direction. The theoretical analysis of such rotation was corroborated by testing. This rotation may result in wear because of the slip motion involved. This work is focused on balls clamped between spherical (concave) surfaces. However, such rotation can also be developed in cylindrical hinges and rolling bearings, naturally loaded between a pair of surfaces. Furthermore, rotation of balls may develop in a nonrotating ball bearing under dynamic environmental conditions.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

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