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13. A hybrid approach of case-based reasoning and process reasoning to typical parts grinding process intelligent decision.

Author

Li, Zhongyang, Deng, Zhaohui, Ge, Zhiguang, Lv, Lishu, and Ge, Jimin

Subjects
CASE-based reasoning, DECISION making, SPINDLES (Machine tools), PRODUCTION planning, GRINDING machines
Abstract

After grinding, the machine tool spindle with high surface integrity has a significant impact on its subsequent service life. Therefore, it is necessary to create a reasonable process plan for the grinding process of the machine tool spindle. A hybrid method based on case-based reasoning (CBR) and process reasoning (PR) was proposed in this paper. The subjective and objective weights of feature attributes are determined in the CBR by the AHP method and the CRITIC method, respectively, and the similarities between the latest case and the retrieved case are calculated on the basis of the nearest neighbour algorithm. The most suitable process solution can be selected from the case database by means of CBR. PR is applied to solve the problem that the case cannot be retrieved through CBR or is unsatisfactory. In the case of the grinding machine spindle, the applicability of this technology was demonstrated. Consequently, the results revealed that the surface consistency of the spindle after grinding was substantially increased. A decision-making system based on the proposed approach was developed by using Qt 4.8.7 and SQLite 3. The results demonstrate the viability and efficacy of the hybrid CBR-PR method to rapidly generate process planning for specific parts. [ABSTRACT FROM AUTHOR]

Published
2023
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14. Robot welding seam online grinding system based on laser vision guidance

Author

Zhongyang Li, Li Wei, Ge Jimin, Lishu Lv, Zhaohui Deng, and Tao Liu

Subjects
Machine vision, Computer science, business.industry, Mechanical Engineering, Coordinate system, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Mechanical engineering, ComputerApplications_COMPUTERSINOTHERSYSTEMS, Data buffer, Welding, Industrial and Manufacturing Engineering, Computer Science Applications, law.invention, Grinding, Robot welding, Software, Control and Systems Engineering, law, Robot, business
Abstract

Uneven surface quality usually occurs when grinding welds offline, which results non-uniform stress and then would damage the workpiece. In this paper, the robotic welding seam online grinding system based on laser vision sensor was proposed and built. A weld seam tracking software was developed and the data online interaction method of grinding system based on XML (Extensible Markup Language) file was applied. Firstly, hand-eye calibration model was built to convert data in the robot coordinate system. Then the weld profile information was extracted and stored in the data buffer area, and the coordinates of the robotic grinding point were transmitted through the self-developed weld grinding software. Finally, the vision system and the self-made grinding system were integrated at the end of the robot. The experiments were conducted to verify the reliability and practicality of this system and the proposed data interaction online method.

Published
2021

19. Research Progresses of Robot Grinding and Polishing Force Compliance Controls.

Author

GE Jimin, DENG Zhaohui, LI Wei, LI Chongyang, CHEN Xi, and PENG Deping

Subjects
GRINDING & polishing, ROBOTS, SURFACE roughness, PASSIVE components
Abstract

Low-cost and high-dexterity robots were used in field of grinding and polishing more and more widely. Compliance control of grinding and polishing forces for robots were the key to reduce surface roughness of workpieces and obtain high shape accuracy and surface integrity. Main research results of at home and abroad scholars n robots' grinding and polishing force active compliance control strategies' passive compliance control devices, active-passive compliance control methods were summarized. Principles and implementation processes of various typical control methods were analyzed, and the advantages and disadvantages of each method were compared. Problems existing in current researches were pointed out. Finally, the key technical difficulties were summarized, and development trend was looked forward. [ABSTRACT FROM AUTHOR]

Published
2021
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