Design and Analysis of a Sawing-Milling Compound Machining Center for Special-Shaped Stone Products

2014 ◽  
Vol 610 ◽  
pp. 123-128
Author(s):  
Do Hong Zhao ◽  
Jing Sun ◽  
Ke Zhang ◽  
Yu Hou Wu ◽  
Feng Lu
Keyword(s):  
High Efficiency ◽  
Dynamic Performance ◽  
Processing Technology ◽  
Machining Accuracy ◽  
Processing Capacity ◽  
Under Five ◽  
Machining Center ◽  
Simultaneous Control ◽  
Five Axis ◽  
Better Than

Nowadays, the equipment for processing special-shaped stone products is developing towards high efficiency, intelligent and multifunction. Based on the features of stone processing technology, a sawing-milling compound machining center with eight axes and double five-axis simultaneous control for special-shaped stone products was designed. The dynamic performance and processing capacity were tested. Research shows that the sawing and milling compound machining in the same horizontal slide saddle is practicable. This machine can realize both vertical and horizontal machining under five-axis simultaneous control, and its machining accuracy is better than the normal industrial standard.

scholarly journals Research on a Five-Axis Machining Center Worktable with Bionic Honeycomb Lightweight Structure

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 74
Author(s):  
Lai Hu ◽  
Jun Zha ◽  
Fan Kan ◽  
Hao Long ◽  
Yaolong Chen
Keyword(s):  
Machine Tool ◽  
High Efficiency ◽  
Honeycomb Structure ◽  
Theoretical Research ◽  
Processing Efficiency ◽  
Actual Weight ◽  
Circular Tubes ◽  
Machining Center ◽  
Five Axis ◽  
Better Than

The processing of high-precision aerospace parts requires not only ultra-precision machine tools, but also high-efficiency processing. However, in order to realize high-efficiency processing, besides optimizing the system and process parameters, some subversive research can also be done on the machine tool structure. In this paper, the lightweight research is mainly carried out on the structure of machine tool worktable. The traditional workbench is very “heavy” and “slowness”. If the traditional workbench is subverted and reformed to reduce the weight, the processing efficiency will be improved qualitatively. Therefore, this paper studies the lightweight worktable of CFRP (carbon fiber reinforced polymer) in combination with the biological “honeycomb” shape. At first, the tensile, bending, compressive and laminar shear analysis of CFRP were carried out, and the comprehensive parameters were obtained. Simultaneously, the theoretical research and the honeycomb structure simulation and verification of CFRP worktable are carried out. The results show that the HACT (honeycomb arrangement of circular tubes) is 18.51% better than the SACT (straight arrangement of circular tubes) and 45.05% better than the OW (original worktable) by comparing and analyzing the weight of the three modes (HACT, SACT and OW). The actual weight of bionic honeycomb lightweight worktable is 1100 kg, while the simulation result is 1080.25 kg, with an error of 1.8%. Meanwhile, it is analyzed that the original workbench weight of the five-axis machining center is 2023 kg, while the simulation result is 1998.6 kg, with an error of 1.2%. The lightweight degree is reduced by 45.05%. However, the actual lightweight degree has been reduced by 45.63%. The error between simulation and actual is less than 1.3%. This kind of structural transformation has brought forward cutting-edge innovations to the machine tool processing industry. It provides a reference scheme for related enterprises in the future equipment renovation.

Sensitivity Analysis Between Error Motions and Machined Shape Errors in Five-Axis Machining Centers: In Case of S-Shaped Machining Test by a Square End Mill

2019 ◽  
Author(s):  
Zongze Li ◽  
Ryuta Sato ◽  
Keiichi Shirase ◽  
Yukitoshi Ihara
Keyword(s):  
Sensitivity Analysis ◽  
Coordinate System ◽  
Complex Surface ◽  
Machining Accuracy ◽  
Machined Surface ◽  
Machining Center ◽  
Shape Errors ◽  
Machining Test ◽  
Tool Motion ◽  
Five Axis

Abstract Five-axis machining center, combined three linear and two rotary axes, has been increasingly used in complex surface machining. However, as the two additional axes, the machined surface under table coordinate system is usually different from the tool motion under machine coordinate system, and as a result, it is very tough to predict the machined shape errors caused by each axes error motions. This research presents a new kind of sensitivity analysis method, to find the relationship between error motions of each axis and geometric errors of machined shape directly. In this research, the S-shaped machining test is taken as a sample to explain how the sensitivity analysis makes sense. The results show that the presented sensitivity analysis can investigate how the error motions affect the S-shaped machining accuracy and predicted the influence of error motions on certain positions, such as the reversal errors of the axes around motion reversal points. It can be proved that the presented method can help the five-axis machining center users to predict the machining errors on the designed surface of each axes error motions.

Influence of NC Control System on S-shaped Machining Accuracy of Five-axis Machining Center

2018 ◽  
Vol 2018 (0) ◽  
pp. S1310003
Author(s):  
Zongze LI ◽  
Ryuta SATO ◽  
Keiichi SHIRASE ◽  
Yukitoshi IHARA
Keyword(s):  
Control System ◽  
Machining Accuracy ◽  
Machining Center ◽  
Five Axis

Application of Honeycomb Structure in Machine Tool Table

2011 ◽  
Vol 308-310 ◽  
pp. 1233-1237
Author(s):  
Dong Qiang Gao ◽  
Fei Zhang ◽  
Zhi Yun Mao ◽  
Huan Lin ◽  
Jiang Miao Yi
Keyword(s):  
Machine Tool ◽  
Structural Design ◽  
High Speed ◽  
Dynamic Performance ◽  
Inertial Force ◽  
Honeycomb Structure ◽  
Machining Accuracy ◽  
Aluminum Alloy Honeycomb ◽  
Better Than ◽  
Ansys Workbench

The aluminum alloy honeycomb structure used in the structural design of high-speed machine tool table to reduce the worktable’s quality, so that the inertial force generated from fast-moving reduced too. The new worktable and the original one both carried out static analysis and modal analysis by ANSYS Workbench respectively. From the result’s comparison, we can know that the new structure worktable’s static and dynamic performance are both better than the original one. The machine tool table’s machining accuracy has been raised.

STUDY OF A NEW AND LOW-COST MEASUREMENT METHOD OF VOLUMETRIC ERRORS FOR CNC FIVE-AXIS MACHINE TOOLS

2013 ◽  
Vol 37 (3) ◽  
pp. 829-840 ◽  
Author(s):  
Shih-Ming Wang ◽  
Han-Jen Yu ◽  
Hung-Wei Liao
Keyword(s):  
Machine Tools ◽  
Measurement Method ◽  
High Efficiency ◽  
Low Cost ◽  
Machining Accuracy ◽  
Manufacturing Cost ◽  
Error Measurement ◽  
Volumetric Error ◽  
Volumetric Errors ◽  
Five Axis

An effective and inexpensive volumetric error measurement method is an essential of the software-based error compensation method that can improve the machining accuracy of a CNC machine tool without increasing hardware manufacturing cost. In this paper, a new volumetric-error measurement method incorporating of three derived error models, two-step measurement procedure, and use of telescoping ball-bar was proposed for three major types of five-axis machine tools. Comparing to the methods currently used in industry, the proposed method provides the advantages of low cost, easy setup, and high efficiency. The simulation and experimental results have shown the feasibility and effectiveness of the method.

Recent Patents for the Motorized Spindle Preload Mechanism

2021 ◽  
Vol 13 ◽  
Author(s):  
Ye Dai ◽  
Wan-Jian Wen ◽  
Li-Yu Xuan ◽  
Xiao-Yang Yu ◽  
Gang Wang
Keyword(s):  
Working Conditions ◽  
High Efficiency ◽  
Dynamic Performance ◽  
Machining Accuracy ◽  
Hydraulic Pressure ◽  
Motorized Spindle ◽  
Existing Problems ◽  
Advantages And Disadvantages ◽  
High Level ◽  
Structural Research

Background: The motorized spindle preload technology is one of the motorized spindle key technologies, and adjusting the preload according to the working conditions can effectively improve the dynamic performance of the motorized spindle and enhance the machining accuracy. Objectives: Review the preload mechanism development, introduce various preload mechanisms, and show research status in recent years. Then to explore and predict the future development of preload technology through the analysis of the overall preload mechanism. Methods: Search for different kinds of patents and literature about spindle preload structure in recent years. Through structural research and comparison with the traditional preload mechanism, to review the structure principle of various preload mechanisms at the present stage, then shown the advantages and disadvantages of each structure. Result: According to the patents and research of the preload mechanism in recent years, classification introduced the piezoelectric ceramic preload device, electromagnetic preload device, and hydraulic preload device, and so on. Introduce their advantages and existing problems in detail, then comprehensively compare the advantages and disadvantages of various mechanisms in control and mechanism. Finally, discuss the prospects and development directions of preload technology. Conclusion: With the further development of technology, high-precision products have higher requirements for machine tools, such as low latency, low heat generation, high efficiency, and long life. People use electromagnetic force, air pressure, hydraulic pressure, and other methods, to control the magnitude of the preload, maintain the performance of the motorized spindle at a high level. Compared with the traditional quantitative preload, their applicable working conditions are more extensive and accuracy is higher. However, various new preload methods still have certain shortcomings and need further improvement.

Investigation of Motion Control of Liner Axes and a Rotary Axis Under Constant Feed Speed Vector at Milling Point With a Five-Axis Machining Center

2013 ◽  
Author(s):  
Yuma Maruyama ◽  
Takayuki Akai ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Keiji Ogawa
Keyword(s):  
Surface Roughness ◽  
Present Report ◽  
Sudden Change ◽  
Machining Accuracy ◽  
Feed Speed ◽  
Motion Error ◽  
Rotary Axis ◽  
Machining Center ◽  
Five Axis ◽  
Cutting Point

Recently, a novel manufacturing technology has spread out with a five-axis machining center. It is especially important to keep the surface roughness on an entire machined surface constant. Thus, we proposed a novel method for maintaining a constant feed speed vector at the cutting point between the end-mill tool and the workpiece surface by controlling two linear axes and a rotary axis with a five-axis machining center. In the present report, we focused on machining the combined inner and outer radius curvature and investigating the influence of synchronous control error between the linear axes and rotary axis on the machining accuracy and surface roughness. As a result, we determined that it is possible to suppress sudden change in the synchronous motion error by accurately aligning the motion direction of the linear and rotary axes and the feed speed vector at milling point at the contact point of the inner and outer circles.

scholarly journals Bionic Design for Column of Gantry Machining Center to Improve the Static and Dynamic Performance

2012 ◽  
Vol 19 (4) ◽  
pp. 493-504 ◽  
Author(s):  
Shihao Liu ◽  
Wenhua Ye ◽  
Peihuang Lou ◽  
Weifang Chen ◽  
Jungui Huang ◽  
...  
Keyword(s):  
Design Method ◽  
Dynamic Performance ◽  
Machining Accuracy ◽  
Bionic Design ◽  
Element Analysis ◽  
Plate Structure ◽  
Design Concepts ◽  
Machining Center ◽  
Dynamic Experiments ◽  
Lightweight Structure

In order to improve the machining accuracy of a gantry machining center, structural bionic design for column was conducted. Firstly, the bionic design method for stiffener plate structure was established based on distribution principles of gingko root system. The bionic design method was used to improve column structure of the gantry machining center, and three kinds of bionic columns were put forward. The finite element analysis on original and bionic columns indicates that the mass of the column with the best bionic stiffener plate structure is reduced by 2.74% and the first five order natural frequencies are increased by 6.62% on average. The correctness of column's bionic design method proposed in this paper was verified by the static and dynamic experiments. Finally, the bionic principles for stiffener plate of column were concluded, which provides a new idea for updating traditional design concepts and achieving lightweight structure of machine tool components.

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