High-Efficient Calculation Method for Sensitive PDGEs of Five-Axis Reconfigurable Machine Tool

Song, Zhanqun; Ding, Shuang; Chen, Zhiwei; Lu, Zhongwang; Wang, Zhouzhou

doi:10.3390/machines9050084

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…Zhong et al [22] developed a volumetric error model that was based on screw theory, and the identification method for the squareness errors was designed based on the theory considering a three-axis horizontal machine tool. Song et al [23] presented a high-efficient calculation method for sensitive position-dependent geometric error identification for the five-axis machine tool. In this paper, a series of points in the machining area were selected to compare the machining errors before and after error compensation, and the results show that this method was accurate.…”

Section: Introductionmentioning

confidence: 99%

Influence Analysis of Geometric Error and Compensation Method for Four-Axis Machining Tools with Two Rotary Axes

Zhao

Jiang²,

Dong³

et al. 2022

Machines

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Four-axis machine tools with two rotary axes are widely used in the machining of complex parts. However, due to an irregular kinematic relationship and non-linear kinematic function with geometric error, it is difficult to analyze the influence the geometry error of each axis has and to compensate for such a geometry error. In this study, an influence analysis method of geometric error based on the homogeneous coordinate transformation matrix and a compensation method was developed, using the Newton iterative method. Geometric errors are characterized by a homogeneous coordinate transformation matrix in the proposed method, and an error matrix is integrated into the kinematic model of the four-axis machine tool as a means of studying the influence the geometric error of each axis has on the tool path. Based on the kinematic model of the four-axis machine tool considering the geometric error, a comprehensive geometric error compensation calculation model based on the Newton iteration was then constructed for calculating the tool path as a means of compensating for the geometric error. Ultimately, the four-axis machine tool with a curve tool path for an off-axis optical lens was chosen for verification of the proposed method. The results showed that the proposed method can significantly improve the machining accuracy.

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Section: Introductionmentioning

confidence: 99%

Influence Analysis of Geometric Error and Compensation Method for Four-Axis Machining Tools with Two Rotary Axes

Zhao

Jiang²,

Dong³

et al. 2022

Machines

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show abstract

“…To achieve high-precision control of the laser focus position, it is essential to establish an accurate kinematic model of the machine tool. At the same time, the ability to accurately and quickly measure the unknown parameters in the model is an important step to achieve high-quality and high-efficiency laser processing [2,3].…”

Section: Introductionmentioning

confidence: 99%

Kinematic Analysis and Parameter Measurement for Multi-Axis Laser Engraving Machine Tools

et al. 2021

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Multi-axis Laser Engraving Machine Tools (LEMT) are widely used in precision processing of parts with complex surface. The accuracy of kinematic model and parameter measurement are the key factors determining the processing quality of LEMT. In this paper, a kinematic model of multi-axis LEMT was established based on Homogeneous Transformation Matrix (HTM). Two types of unknown parameters, linkage parameters and positioning parameters, were measured in the presented model. Taking advantage of the characteristics of laser processing, this paper proposed a rapid measurement method of linkage parameters by combining the machine tool motion with the laser marking action. For positioning parameters, this study proposed a non-contact measurement method based on structured light scanner, which can obtain the translation values and the rotation values from the Workpiece Coordinate System (WCS) to the Basic Coordinate System (BCS) simultaneously. After the measurement of two kinds of parameters of a multi-axis LEMT was completed, the processing of a spatial curve was performed and the average contour error was controlled at 15.1 µm, which is sufficient to meet the project requirements.

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“…A method for selecting RMT modules based on RMT ontology was proposed [20] in which the appropriate RMT modules were selected according to the established knowledge base, and the selection of RMT modules was studied according to RMT performance indicators. Ming et al proposed a highly efficient calculation method for sensitive, position-dependent geometric error (PDGE) identification of a five-axis reconfigurable machine tool [21]. Using this method, sensitive PDGEs can be calculated directly according to a mapping expression, which eliminates the process of error modeling and analysis.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Machine Tool Design for Box-Type Part Families

et al. 2021

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The reconfigurable manufacturing system (RMS) is a new manufacturing technology and paradigm that resolves the contradictions regarding high efficiency, low cost and flexible production in the mass production of part families. Reconfigurable machine tools (RMTs) are the core components of RMSs. A new approach is proposed for the design of RMTs, which is closely related to the process planning of a given box-type part family. The concepts of the processing unit and the processing segment are presented; they are not only the basic elements of the processing plans of machined parts, but also closely related to the structural design of RMTs. Processing units created by processing features can be combined into various processing segments. All the processing units of one processing segment correspond to the machining operations performed by one RMT. By arranging the processing segments according to the processing sequence, a variety of feasible processing plans for a part can be obtained. Through analysis of the established similarity calculation model for processing plans, the most similar processing plans for the parts in a given part family can be determined and used for the structural design of RMTs. Therefore, the designed RMTs can achieve rapid conversion of processing functions with the least module replacement or adjustment to realize the production of the parts in the part family. Taking the production of a gearbox part family as an example, the validity of the presented method is verified.

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High-Efficient Calculation Method for Sensitive PDGEs of Five-Axis Reconfigurable Machine Tool

Cited by 6 publications

References 27 publications

Influence Analysis of Geometric Error and Compensation Method for Four-Axis Machining Tools with Two Rotary Axes

Influence Analysis of Geometric Error and Compensation Method for Four-Axis Machining Tools with Two Rotary Axes

Kinematic Analysis and Parameter Measurement for Multi-Axis Laser Engraving Machine Tools

Reconfigurable Machine Tool Design for Box-Type Part Families

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