Analysis on Static Characteristic of HTC100 NC Lathe Bed

2012 ◽  
Vol 226-228 ◽  
pp. 617-620
Author(s):  
Mo Wu Lu ◽  
Guo Ming Zhang
Keyword(s):  
Machine Tool ◽  
Working Conditions ◽  
Production Efficiency ◽  
Equivalent Stress ◽  
Static Characteristic ◽  
Machining Accuracy ◽  
Static Stiffness ◽  
Total Deformation ◽  
Cnc Lathe ◽  
Heavy Machine

HTC 100 CNC lathe is a heavy machine tool. The lathe bed is the important part of the machine tool. The static characteristic of the lathe bed directly influence the machining accuracy and production efficiency of the machine tool. At present, the lathe bed design general depends on the designer’s experience. In this paper, the static analysis of the HTC100 CNC lathe bed is carried out with ANSYS 12.0. The node equivalent stress distribution cloud, the total deformation distribution of Lathe bed and the maximum distortion under various kinds of working conditions are obtained. According to the result, the structure of lathe bed design tends to conservative and the distribution of static stiffness is unreasonable, which is necessary to optimum design.

Finite Element Static Stiffness Analysis of the A/C Axes Bi-Rotary Milling Head

2013 ◽  
Vol 655-657 ◽  
pp. 1195-1199 ◽  
Author(s):  
Bo Shi ◽  
Mei Fa Huang ◽  
Yong Chen ◽  
Ru Kai Hu ◽  
Wu Jun Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Working Conditions ◽  
Structure Design ◽  
Machining Accuracy ◽  
Cnc Machine Tool ◽  
Static Stiffness ◽  
Cnc Machine ◽  
Stiffness Analysis ◽  
Five Axis

A/C axes bi-rotary milling head is an important functional component in gantry type five-axis CNC machine tool. The static characteristics affect directly the machining accuracy of machine tool. The paper investigates the static stiffness of A/C axes bi-rotary milling head in gantry type five-axis CNC machine tool XK2320-5X developed by a domestic company. Because this product developed depend on the experience of designers, the machining accuracy of A/C axes bi-rotary milling head of primitive XK2320-5X type cannot meet the accuracy requirement under actual working conditions. On the basis of structure design, the static stiffness analysis of the milling head under two working conditions is carried out using finite element method. The deformations of the main mechanical parts in the milling head are obtained. The analysis results indicate that the static stiffness in direction X is the weakest of the milling head and the milling head shell is the most important factor of deformation. The work done provides foundation for further structure design and machining accuracy improvement of A/C axes bi-rotary milling head.

scholarly journals Steady State Thermal Effect on Static Characteristic of Copper Roller Shaft

2021 ◽  
Vol 2117 (1) ◽  
pp. 012036
Author(s):  
E Marliana ◽  
G P Utomo ◽  
S Fuad ◽  
A A Arifin
Keyword(s):  
Heat Flux ◽  
Steady State ◽  
Thermal Effect ◽  
Equivalent Stress ◽  
Static Characteristic ◽  
Total Heat Flux ◽  
Total Deformation ◽  
Maximum Equivalent Stress ◽  
Slab Temperature ◽  
Thermal Steady State

Abstract The static analysis of a copper roller shaft is performed. The copper roller shaft consists of bushing, pen roll and roller. All of those components g4bconsist of different materials. Thermal steady state and statical analysis is performed in order to investigate the thermal effect of high temperature copper slab on the roller shaft. The copper slab temperature is 1200 OC. Based on this work obtained that the maximum total deformation is 0.0050523 m, maximum equivalent stress is 41600 MPa, maximum life cycle is 1011, total heat flux maximum is 879910 W/m2 and the maximum damage occur in the pen roll component.

The Multi-Station Clamp Device of the Long Truss Girder End Parts Processing

2015 ◽  
Vol 713-715 ◽  
pp. 69-72
Author(s):  
De Ying Sun ◽  
En Guang Shang
Keyword(s):  
Machine Tool ◽  
Production Efficiency ◽  
Complex Structure ◽  
Machining Accuracy ◽  
Milling Machine ◽  
Change Type ◽  
Nc Machine Tool ◽  
Nc Milling ◽  
Nc Machine ◽  
The Cost

The Long girder end parts are one of the types structure in aerospace equipment, the complex structure parts, machining parts. Usually the parts be processed on the NC milling machine, through the analysis of processing craft, design a kind of quick change type, Multi-station clamp device, instead of processing the parts on the multi-axis nc machine tool; at the same time of guarantee machining accuracy, in order to improve the production efficiency and reduce the cost of production.

The Spindle Static Characteristic Analysis of HTC3250µn NC Machine Tool

2012 ◽  
Vol 157-158 ◽  
pp. 291-294
Author(s):  
Hua Long Xie ◽  
Wen Ke Zhang ◽  
Hui Min Guo ◽  
Yong Xian Liu
Keyword(s):  
Static Characteristic ◽  
Machining Accuracy ◽  
Static Stiffness ◽  
Analysis Model ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Nc Machine Tool ◽  
The Finite Element Analysis ◽  
Nc Machine

The analysis of spindle static stiffness is particularly important. The concept of spindle stiffness is introduced. Based on software ANSYS, the finite element analysis model of simplified spindle is established. Two equivalent forms of bearings are discussed and the analysis results are compared. The stress distribution nephogram of spindle is given. The research indicates that using spring-damper element instead of bearings is more suitable and the machining accuracy mainly depends on the stiffness rather than strength.

scholarly journals Optimized Design of Precision EDM Machine Tool based on CAE Simulation and Modal Testing Technology

2021 ◽  
Vol 252 ◽  
pp. 02036
Author(s):  
Jianyong Liu ◽  
Yanhua Cai ◽  
Haifeng Zhang ◽  
Liantong Ding
Keyword(s):  
Machine Tool ◽  
Thermal Deformation ◽  
Simulation Analysis ◽  
Design Method ◽  
The Body ◽  
Modal Testing ◽  
Weak Links ◽  
Machining Accuracy ◽  
Optimized Design ◽  
Static Stiffness

For precision EDM equipment, in addition to the static stiffness of the body of the machine, the dynamic characteristics of the body and the ambient temperature are also the key factors that affect the machining accuracy of the workpieces. In this paper, through the modal simulation analysis of the machine tool that with the sheet metal shell, the weak points of the EDM machine tool are determined. Through thermal stress simulation analysis, the thermal deformation law of the workpieces mounting table is determined, and a solution to reduce thermal deformation is proposed. Through machine tool ODS (operating deflection shapes) test and analysis, the weak links of the machine tool's body in actual processing are determined. Through the above optimization analysis, the foundation has been laid for improving the dynamic and static accuracy of the precision machine tool. The research method in this paper makes up for the deficiency of the machine tool design method based on static stiffness.

A precision generating hobbing method for face-gear based on worm hob

2016 ◽  
Vol 231 (6) ◽  
pp. 1057-1071
Author(s):  
Yan-zhong Wang ◽  
Liang-wei Hou ◽  
Zhou Lan ◽  
Can-hui Wu ◽  
Qing-jun Lv ◽  
...  
Keyword(s):  
Machine Tool ◽  
Production Efficiency ◽  
Control Method ◽  
Gear Tooth ◽  
Tooth Surface ◽  
Machining Accuracy ◽  
Analysis Model ◽  
Face Gear ◽  
Gear Hobbing ◽  
The Face

In order to improve the machining accuracy and production efficiency of face-gear, a method of face-gear generating hobbing by worm is provided in this paper. The principle of face-gear hobbing worm is analyzed, and the mathematical model of the worm is presented based on the principle and the theory of meshing. Taking the hobbing needs into account, the special machine tool is provided, and the movement control method of face-gear hobbing by the worm on the machine tool is proposed. The equation of face-gear tooth surface is calculated, and the 3-D model of face-gear is established based on CATIA software. To reduce the face-gear tooth profile errors induced by ratio errors, an error analysis model of face-gear hobbing is established. The experiment is carried out, and the completed specimen is detected by Coordinate Measuring Machining (CMM). The processing parameter is amended according to the tooth flank detection results, and the maximum normal deviation of the whole tooth surface of the face-gear specimen is improved from 243.2 µm to 61.0 µm. Experiment results demonstrate that the method of face-gear hobbing by worm is an effective approach to achieve the precision face-gear with high dimensional accuracy.

The Characteristic Simulation Analysis Method Based on the Theory of Similarity for Combined Interface of Heavy Machine Tools

2013 ◽  
Vol 274 ◽  
pp. 183-186
Author(s):  
Sheng Le Ren ◽  
Ye Dai ◽  
Ming Che ◽  
Xu Du
Keyword(s):  
Machine Tool ◽  
Simulation Analysis ◽  
Similarity Theory ◽  
Static Characteristic ◽  
Scale Model ◽  
Analysis Method ◽  
Characteristic Parameters ◽  
Surface Analysis Method ◽  
Heavy Machine ◽  
Structure And Design

The research on the combination of the characteristics becomes extremely important to the success of machine tool design. This paper mainly studies the dynamic and static characteristic parameters of heavy machine tool guide-way joint. And put forward a practical machine tool combining surface analysis method according to the experimental verification. It is presented that small linear guide as a scale model based on similarity theory. And make a research on the static and dynamic characteristics of small guide joint and the conclusion extended to heavy machine set of faces. And the conclusion is extended to the heavy machine set of faces. The results can be used as reference data about structure and design of the machine tool due to the similarity principle and error range.

Finite Element Analysis for Static Stiffness of a Crankshaft Grinding Machine Tool

2014 ◽  
Vol 543-547 ◽  
pp. 76-79
Author(s):  
Ting Ting Guo ◽  
Teng Jiao Sun ◽  
Fang Shao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Machine Tool ◽  
Element Model ◽  
Machining Accuracy ◽  
Static Stiffness ◽  
Element Analysis ◽  
Technical Parameters ◽  
Grinding Machine ◽  
The Finite Element Model

Taking a grinding machine tool as an example, this paper obtained the static stiffness of the machine tool by finite element analysis method. The structure and technical parameters of the machine tool were introduced at first.Then, the finite element model of the machine tool was established. The static stiffness of the machine tool in x-, y-, and z-directions were simulated at last. The results show that, the static stiffness in x-direction is 2.0062×107 N/m, the static stiffness in y-direction is 0.821×107 N/m, and the static stiffness in z-direction is 0.2992×107 N/m. This paper provides advices for structure optimization of the machine tool which is convenient for improving the machining accuracy.

Effect of guide rail profile errors on the motion accuracy for a heavy-duty hydrostatic turntable

2019 ◽  
Vol 233 (15) ◽  
pp. 5350-5362 ◽  
Author(s):  
Yongsheng Zhao ◽  
Hongchao Wu ◽  
Congbin Yang ◽  
Ligang Cai ◽  
Zhifeng Liu
Keyword(s):  
Machine Tool ◽  
Reynolds Equation ◽  
Machining Accuracy ◽  
Guide Rail ◽  
Heavy Duty ◽  
Motion Equations ◽  
Rotating Speed ◽  
Proposed Model ◽  
Reaction Forces ◽  
Profile Errors

The motion accuracy of hydrostatic turntable is the key in improving the machining accuracy of heavy-duty machine tool. However, the motion accuracy of hydrostatic turntable depends not only on the offset load but also on the rotating speed of the turntable as well as the profile errors of the guide rails. In this paper, a simulation model is developed to analyze the effect of guide rail profile errors on the motion accuracy of hydrostatic turntable. The reaction forces of preload thrust bearing and hydrostatic circular oil pads are obtained based on the Reynolds equation of the lubricant film. The motion equations of hydrostatic turntable are derived in which the profile errors of two guide rails are considered. The results show that the motion accuracy of hydrostatic turntable can be affected by wavelength, amplitude of profile errors and speed, and offset load of turntable. Finally, the motion accuracy of heavy-duty hydrostatic turntable used in XCKA28105 type turning and milling composite machine tool is obtained by using the presented method. Comparing with the experimental results, the proposed model can be used to predict the machining accuracy caused by the profile errors of guide rails for any heavy-duty hydrostatic turntable.

Error correction technique for numerical control machine tools based on the simplex method

2021 ◽  
pp. 095440542110281
Author(s):  
Hongwei Liu ◽  
Rui Yang ◽  
Pingjiang Wang ◽  
Jihong Chen ◽  
Hua Xiang
Keyword(s):  
Machine Tool ◽  
Error Compensation ◽  
Simplex Method ◽  
Tool Path ◽  
Repeated Measurements ◽  
Numerical Control ◽  
Machining Accuracy ◽  
Correction Technique ◽  
Fluctuation Range ◽  
Nc Machine

The objective of this research is to develop a novel correction mechanism to reduce the fluctuation range of tools in numerical control (NC) machining. Error compensation is an effective method to improve the machining accuracy of a machine tool. If the difference between two adjacent compensation data is too large, the fluctuation range of the tool will increase, which will seriously affect the surface quality of the machined parts in mechanical machining. The methodology used in compensation data processing is a simplex method of linear programming. This method reduces the fluctuation range of the tool and optimizes the tool path. The important aspect of software error compensation is to modify the initial compensation data by using an iterative method, and then the corrected tool path data are converted into actual compensated NC codes by using a postprocessor, which is implemented on the compensation module to ensure a smooth running path of the tool. The generated, calibrated, and amended NC codes were immediately fed to the machine tool controller. This technique was verified by using repeated measurements. The results of the experiments demonstrate efficient compensation and significant improvement in the machining accuracy of the NC machine tool.

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