Machining Center Worktable Static Stiffness Spectrum Drawing and Analysis

2011 ◽  
Vol 65 ◽  
pp. 84-87
Author(s):  
Gong Xue Zhang ◽  
Yu Fang Gu ◽  
Bing Bing Han ◽  
Xiao Kai Shen
Keyword(s):  
Optimal Design ◽  
Product Quality ◽  
High Speed ◽  
High Speed Machining ◽  
Static Stiffness ◽  
Main Work ◽  
Machining Center ◽  
Ansys Workbench

The main work is calculating and analyzing the worktable’s static stiffness in different positions, and drawing 3D static stiffness spectrum of the worktable in Z direction according to the analyzing results. DVG850 High-speed machining centre is taken as the research object, to establish the solid modal in ANSYS Workbench and analyze the worktable’s static stiffness in different positions. and the paper uses its worktable as the researching object. According to the results the spectrum of the static stiffness of the worktable is drawing in Matlab. The spectrum shows that the more the position is near the edge, the larger the static stiffness is, and it changes faster, however the middle is smaller. This spectrum has certain directive significance for the optimal design and improvement of product quality of design.

Optimization Design on Headstock of Shape High-Speed Vertical Machining Center

2011 ◽  
Vol 121-126 ◽  
pp. 1023-1027
Author(s):  
Chun Zhang ◽  
Zhi Yuan Li
Keyword(s):  
Optimal Design ◽  
Response Surface ◽  
High Speed ◽  
Optimization Design ◽  
Parametric Model ◽  
Machining Center ◽  
Design Variables ◽  
Test Technology ◽  
Design Result ◽  
Ansys Workbench

Optimization design was a technology that searched and determined the optimal design. Parametric model of headstock was established in Pro/E, and the parametric model was imported into the ANSYS Workbench. Then multi-objective optimization design was carried out in DesignXplorer module based on test technology, response surface that the combinations of design variables aimed at the objective function was obtained, the situation which design variables changes impacted on performance parameters from the response surface was viewed, a relatively ideal optimal design result was chosen. The mass of improved headstock was reduced, under the condition that performance in all aspects was not diminished.

Structure Analysis and Optimization for High-Speed Vertical Machining Tool Table

2011 ◽  
Vol 120 ◽  
pp. 197-202
Author(s):  
Fei Zhang ◽  
Dong Qiang Gao ◽  
Zhi Yun Mao ◽  
Jiang Miao Yi ◽  
Huan Lin
Keyword(s):  
Performance Analysis ◽  
High Speed ◽  
Dynamic Performance ◽  
High Speed Machining ◽  
Static Stiffness ◽  
Performance Requirements ◽  
Overall Performance ◽  
The Cost ◽  
Dynamic Performance Analysis ◽  
Ansys Workbench

In order to meet high-speed machining center’s overall performance requirements, there are four different worktable structures established in SolidWorks, and they are carried out static analysis in ANSYS Workbench to calculate their static stiffness, so that find out the best structure. In meeting the worktable stiffness, the best structure is optimized in ANSYS Workbench, then the worktable’s quality reduces 8.43% in the original foundation and the cost also decreases, which is a basis for worktable’s dynamic performance analysis.

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.

Evaluation and Improvement of Productivity in High-Speed NC Machining

1999 ◽  
Vol 122 (3) ◽  
pp. 556-561 ◽  
Author(s):  
X. Yan ◽  
K. Shirase ◽  
M. Hirao ◽  
T. Yasui
Keyword(s):  
High Speed ◽  
Nc Machining ◽  
Cutting Conditions ◽  
High Speed Machining ◽  
Machining Time ◽  
Time Constants ◽  
Nc Program ◽  
Kinematic Factor ◽  
Two Factors

The productivity of machining centers is influenced inherently by the quality of NC programs. To evaluate productivity, first an effective feedrate factor and a productivity evaluation factor are proposed. It has been found that in high-speed machining, these two factors depend on a kinematic factor which is a function of (1) command feedrate, (2) average per-block travel of the tool, (3) moving vectorial variation of the tool, and (4) ac/deceleration or time constants. Then an NC program simulator has been developed to evaluate productivity. With the simulator, the machining time can be calculated accurately and the cutting conditions can be extracted. Finally, three NC programs were implemented on high-speed machining centers and analyzed by the simulator. It was found that in mold and die machining, the productivity can be improved by increasing the acceleration and average travel and reducing the vectorial variation of the tool rather than the command feedrate. [S1087-1357(00)01303-4]

Optimization Design of DVG850 Worktable System Based on ANSYS Workbench

2012 ◽  
Vol 184-185 ◽  
pp. 356-359
Author(s):  
Jiang Miao Yi ◽  
Dong Qiang Gao ◽  
Fei Zhang ◽  
Huan Lin
Keyword(s):  
Modal Analysis ◽  
Natural Frequency ◽  
High Speed ◽  
Optimization Design ◽  
Element Model ◽  
Single Screw ◽  
Machining Center ◽  
The Finite Element Model ◽  
Better Than ◽  
Ansys Workbench

The finite element model of worktable system is created and modal analysis is made with ANSYS Workbench by taking DVG850 high-speed vertical machining center worktable system for example. We make modal analysis of single-screw strength general reinforcement worktable system and get the natural frequency and the vibration mode.Then in order to improve the system's natural frequency, the scheme of dual-screw worktable system is put forward. Also natural frequency and vibration mode is got. Finally, it is proved that the performance of dual-screw worktable system is significantly better than the single-screw one. This provides a reliable reference for further study on dynamic analysis of worktable system.

An experimental investigation of spindle rotary error on high-speed machining center

2013 ◽  
Vol 70 (1-4) ◽  
pp. 327-334 ◽  
Author(s):  
Lan Jin ◽  
Zhaoyang Yan ◽  
Liming Xie ◽  
Weidong Gou ◽  
Linhu Tang
Keyword(s):  
Experimental Investigation ◽  
High Speed ◽  
High Speed Machining ◽  
Machining Center

Modal Analysis of BT Spindle-Toolholder Interface Based on Abaqus/Standard

2013 ◽  
Vol 662 ◽  
pp. 632-636
Author(s):  
Yong Sheng Zhao ◽  
Jing Yang ◽  
Xiao Lei Song ◽  
Zi Jun Qi
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Element Model ◽  
Contact Theory ◽  
High Speed Machining ◽  
The Finite Element Model

The quality of high speed machining is directly related to dynamic characteristics of spindle-toolholder interface. The paper established normal and tangential interactions of BT spindle-toolholder interface based on finite element contact theory, and analysed free modal in Abaqus/Standard. Then the result was compared with the experimental modal analysis. It shows that the finite element model is effective and could be applied in the future dynamic study of high-speed spindle system.

Cutting Force and Tool Deflection Predictions for High Speed Machining of Hard to Cut Material

2010 ◽  
Vol 154-155 ◽  
pp. 1157-1164 ◽  
Author(s):  
Jinn Jong Sheu ◽  
Dong Mei Xu ◽  
Chin Wei Liu
Keyword(s):  
Cutting Force ◽  
Cutting Forces ◽  
High Speed ◽  
Force Model ◽  
Beam Model ◽  
High Speed Machining ◽  
Tool Deflection ◽  
Machining Center ◽  
Helical Angle ◽  
Cutting Experiment

The dimension accuracy and the too life are the major issues of the machining of hard-to-cut materials. To fulfill the requirements of accuracy and tool life needs not only well planning of cutting path but also the proper cutting conditions of cutters. The vibration and deflection of cutters caused by poor selection of cutting conditions can be predicted using models of cutting force and tool deflection. In this paper, a cutting force model considering the effect of tool helical angle and a cantilever beam model of tool deflection were proposed for the high speed machining of hard-to-cut material SKD11. The shearing force, the plowing forces, and the helical angle of cutters are considered in the elemental force model. The material of workpiece, SKD11, studied in this paper is commonly used for the die and mold industries. The cutting constants of the proposed force model are determined via the cutting experiments carried out on a high speed machining center. A dynamometer and a high frequency data acquisition system were used to measure the x-, y-, and z-direction cutting forces. The obtained cutting constants were used to predict the cutting forces and compared with the results obtained from the cutting experiment of verification using cutters with different helical angles. The theoretical and the experimental cutting forces in the x-, y-, and z- direction are in good agreement using flat cutters with 30 and 45 degrees of helical angle. The dimension deviations of the cut surface in the cutting experiment case of tool deflection were measured using a touch probe and an infrared receiver installed on the machining center. The measured average dimension deviation, 0.163mm, is close to the predicted tool deflection, 0.153mm, using the proposed cantilever beam model. The comparisons of the cutting forces and the average of the cut surface dimension deviation are in good agreement and verify the proposed cutting force and the tool deflection models are feasible and useful.

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