Dynamic performance test under complicated motion states for five-axis machine tools based on double ballbar

Ding, Qicheng; Wang, Wei; Du, Lan; Ding, Jiexiong; Zhang, Jing; Wang, Liping

doi:10.1007/s00170-020-06101-3

Cited by 10 publications

(5 citation statements)

References 42 publications

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“…In the current research on SDMD, most researchers believe that the position loop proportional gain coefficient and the speed feedforward gain coefficient have an important impact on the matching degree. And because servo control system parameters are easier to change compared with electrical and mechanical system parameters, most research are to adjust the matching degree by changing control parameters [10][11][12][13][14]. Therefore, to verify the rationality of the definition of two-axis SDMDI, experiments focus on the influence of servo control system parameters on the index.…”

Section: Influence Of Servo Control System Parameters On the Indexmentioning

confidence: 99%

“…With further research into the servo dynamics of multi-axis machine tools, the relationship between various parameters in the servo control system and the SDMD has become increasingly clear [10][11]. Currently, in the study on the impact of SDMD on machining accuracy in multi-axis machine tools, SDMD is often controlled by adjusting the proportional gain coefficients to explore the relationship between SDMD and machining accuracy [12][13][14]. However, existing research mainly focus on the mechanism by which SDMD affects machining accuracy, but do not provide a specific mathematical definition of SDMD.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic performance optimization of five-axis machine tools based on S-specimen and servo dynamics matching degree indexes

Guan,

Chen,

Wang

2024

Preprint

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With the advancement of the manufacturing industry, there is a growing need for high-speed five-axis machine tools that offer superior precision. Current research indicates that with the increase in the feed rate of machine tools, the influence of machine tool dynamic performance on precision becomes increasingly significant. In addition to the tracking performance of a single machine axis system, the servo dynamics matching degree (SDMD) between each machine axis system has also been widely recognized as one of the important factors affecting the dynamic performance in recent research. As an ISO standard specimen, the S-specimen has emerged as the frequently utilized specimens for machine tool acceptance testing, owing to its capacity to better reflect the dynamic performance of five-axis machine tools. Nevertheless, the intricate mapping relationship between the factors influencing SDMD and the contour error of the S-specimen constrains the applicability of this standard specimen in error diagnosis and subsequent dynamic performance optimization. Therefore, based on the machining process of the S-specimen, a dynamic performance optimization method by improving SDMD was proposed in this paper. An index of SDMD between two machine axis systems (two-axis SDMDI) was established which clarifies the specific source for error diagnosis. A calculation model of the two-axis SDMDIs of five-axis machine tool was established based on the mapping relationship between the index and the contour error of S-specimen which provided an effective way for optimization of SDMD based on S-specimen machining test. Experiments were carried out to verify the effectiveness of the proposed optimization method.

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Section: Influence Of Servo Control System Parameters On the Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic performance optimization of five-axis machine tools based on S-specimen and servo dynamics matching degree indexes

Guan,

Chen,

Wang

2024

Preprint

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“…The assembly and the component defects of the machine tool define its geometric errors; moreover, several improvements have been done currently to minimize them by some researchers [ 10 , 12 – 16 ]; dynamic errors affect the dynamic machining process, which significantly contributes to the other error factors [ 17 ], and the International Organization for Standardization 230 (ISO) has developed several schemes of measuring techniques to reduce dynamic error [ 18 , 19 ]. Both the non-machining test and the standard piece test have been used for the dynamic performance test; though the dynamic errors have no standardized measuring method, however, the double ball-bar (DBB) and the R-test devices have been used in their identification non-machining test [ 20 – 23 ]. However, the actual machining performance is the focus of many machine tool engineers where parts’ precision is taken to be a direct reflection of the machine tool precision; hence, their no-load measuring condition and presence of setup errors of these devices do not give a true reflection of actual dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

Kinematics and geometric features of the s-cone test piece: identifying the performance of five-axis machine tools using a new test piece

Osei

Wang

Ding

2023

Int J Adv Manuf Technol

Self Cite

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The design of machine parts of different sizes and shapes has become relevant in the manufacturing industry which requires five-axis machine tools of high dynamic performance; different machining test pieces have been used to test and reflect the machine tool’s performance. The S-shaped is still under development and consideration of which a new test piece better than the S-shaped part has been recommended to be put forward making the NAS979 the only standardized test piece; however, it has some limitations. Hence, this study proposes a new test piece to objectively satisfy the demand for machine tools with higher dynamic performance, which shows much improvement over the standard NAS979 and is the best alternative to the S-shaped test piece, and it combines the geometric and kinematic features of both test pieces. Geometrically, it has non-uniform surface continuity, variable twist angle, and variable curvature; and the cutting tool moves in close and opened angles along the tool path; there is sudden rise and fall of axes’ velocity, acceleration, and jerk with much impact during machining which makes the S-cone test piece be machined by only five-axis machine tools with high dynamic performance, and has a better dynamic performance identification effect than the S-shaped test piece based on the trajectory test. Detailed work on the validation of the machine tool’s dynamic performance using the S-cone part will be captured next part of this study.

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“…Based on the RTCP function, Jiang 12 proposed an 8-shape motion trajectory and simulated the dynamic accuracy using the established feed axis servo system model. Ding 13 evaluated the error detection performance of existing RTCP motion trajectories to guide the error detection trajectory planning. The above research proposed a variety of kinematic testing methods, which effectively evaluated the dynamic precision of the machine tool but did not profoundly analyze the main factors affecting the dynamic motion error.…”

Section: Introductionmentioning

confidence: 99%

Identification method for the dynamic motion error of the rotary axis based on circular and elliptical test piece cutting

Zhang

Xiang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The rotary axis is crucial for the machining accuracy of five-axis machines, and its motion accuracy is significantly influenced by the dynamic motion error. A test of circular and elliptical test piece cutting is proposed to identify and analyze the dynamic motion error of the rotary axis. The influence of the feed rate on the dynamic motion accuracy is explained. The dynamic motion error can be divided into two types, depending on its source and manifestation: dynamic error inside the servo loop (DEIS) and dynamic error outside the servo loop (DEOS). At different feed rates, elliptical test piece cutting and kinetics analyses are conducted to identify the DEIS, and circular test piece cutting together with double ball bar (DBB) tests are conducted to identify the DEOS. On-machine inspection and the coordinate measuring machine (CMM) calibration are performed. By combining the DBB test and kinetics analysis results, the DEIS and DEOS are identified and analyzed. The experimental verification shows that the DEIS and DEOS change according to the feed rate and can be determined from the machining error of the test piece. Consequently, the proposed method offers an effective reference for improving the motion accuracy of the rotary axis.

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Dynamic performance test under complicated motion states for five-axis machine tools based on double ballbar

Cited by 10 publications

References 42 publications

Dynamic performance optimization of five-axis machine tools based on S-specimen and servo dynamics matching degree indexes

Dynamic performance optimization of five-axis machine tools based on S-specimen and servo dynamics matching degree indexes

Kinematics and geometric features of the s-cone test piece: identifying the performance of five-axis machine tools using a new test piece

Identification method for the dynamic motion error of the rotary axis based on circular and elliptical test piece cutting

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