Zhongliang University Students Develop New Flexible Polishing Equipment: Cracking The Difficulties Of High End Manufacturing And Processing

At a critical period of global manufacturing transformation towards intelligence and green, the "Cloud Grinding Intelligent Engine" team of China Metrology University has successfully launched a "flexible polishing equipment based on electromagnetic force control and visual guidance" after two years of technological research and development. This device breaks through the bottleneck of traditional rigid polishing technology, achieving high-precision force control, intelligent path planning, and integrated multi-faceted processing. It provides efficient and green precision machining solutions for high-end fields such as aerospace, automotive manufacturing, and semiconductors, and has become an important innovative achievement in promoting the upgrading of "Made in China".
Directly addressing industry pain points: Traditional polishing of 'hard wounds' leads to flexible solutions
Traditional polishing techniques have long been plagued by many difficulties. In complex surface machining scenarios, rigid polishing equipment often causes overload damage, resulting in workpiece scrap; The problem of insufficient polishing is not uncommon, which makes it difficult to guarantee product quality; The phenomenon of secondary annealing occurs frequently, which not only reduces production efficiency but also affects product performance. These issues are particularly prominent in high-end manufacturing industries such as aerospace and precision instrument manufacturing, which require extremely high precision.
In response to the above issues, the "Cloud Grinding Intelligent Engine" student team at China University of Metrology has keenly captured these industry pain points, integrated electromagnetics, robotics, and machine vision technologies, and developed a flexible polishing equipment that integrates "electromagnetic compliance force control+visual precision guidance", achieving a leap from "extensive processing" to "precision intelligent manufacturing".
The flexible polishing equipment developed by the Yunmo Zhiqing team has three core technologies: redefining precision polishing standards
1. Electromagnetic variable stiffness compliant polishing device - with a force control accuracy of ± 1N and a response speed increase of 40%
Innovatively adopting a fixed coil dynamic iron voice coil motor, the dynamic adjustment of 0-100N contact force is achieved through the principle of current stiffness linear mapping, with a force control accuracy of ± 1N and a response speed of ≤ 40ms, which is 40% higher than traditional solutions. The device is equipped with a six axis force sensor and displacement sensor, which can compensate for surface deviations within a range of 20mm in real time, effectively eliminate grinding vibrations, and stabilize the surface roughness of hard materials such as aluminum alloy and titanium alloy at Ra ≤ 0.8 μ m, achieving aviation grade precision machining standards.
2. Intelligent Flip Workbench -360 ° No Dead Angle Processing, Dust Removal Efficiency Exceeding 99.7%
Integrated high-precision indexing disc (resolution 0.00625 °, repeat positioning accuracy 0.0035 °), supports 360 ° automatic flipping of workpieces, and can complete multi-faceted processing with one clamping, solving the pain point of traditional equipment requiring multiple manual adjustments. The supporting gas gyroscope industrial dust collection system adsorbs and grinds dust at a flow rate of 2000m ³/h, with a dust removal efficiency of 99.7%, significantly improving the working environment and reducing occupational disease risks.
3. Visual guidance system - AI algorithm empowerment, weld seam recognition accuracy of 98.7%
Equipped with a laser 3D scanner and an improved Yolack+deep learning algorithm, the recognition accuracy of small targets such as bimetallic welds has been improved to 98.7% through the GhostNet backbone network and CoordinateAttention attention mechanism, with a single frame processing speed of 15.32 FPS. Combining the six axis robot hand eye calibration technology, we achieve micrometer level matching between theoretical models and actual machining coordinates, with a path planning error of ≤ 0.03mm, completely solving the problem of "difficult positioning and slow planning" for complex surfaces.
The project is composed of 9 undergraduate students majoring in Mechanical and Electronic Engineering, Measurement and Control Technology and Instruments, and Industrial Engineering at China University of Metrology. Under the guidance of teachers such as Jiang Zhitao, it took 2 years to complete the principle design, prototype development, and industrial testing. The team has overcome the bottleneck of "difficult implementation of student scientific research" and jointly established a joint laboratory with enterprises to achieve a closed-loop of "technology research and development scenario verification process optimization". It has been evaluated by industry experts as a "typical achievement with both academic value and engineering significance", and the project has received authoritative recognition from various aspects. The novelty of the core technology of the project has been verified by the domestic and foreign novelty search of the Shanghai Science and Technology Novelty Search Consulting Center of the Chinese Academy of Sciences, and the comprehensive technology has reached the international advanced level. The team has applied for 8 patents, including 7 invention patents, 1 software copyright, and 1 design patent, forming a comprehensive intellectual property protection system.
At the critical stage of project achievement transformation and industry application implementation, the "Yunmo Zhiqing" team has reached a deep industry university research cooperation with Zhejiang Sipu Sawing Industry Co., Ltd. (referred to as "Sipu Sawing Industry") to jointly initiate technological innovation in the field of intelligent saw blade welding seam polishing. As a leading enterprise in the manufacturing of high-end sawing tools in China, Sipu Sawing Industry takes "reducing sawing costs and improving cutting efficiency" as its vision, and promotes industry progress through continuous innovation, global cooperation, and strict quality management system. The flexible polishing and grinding process jointly developed by both parties has been included in the standard process of Sipu Sawing Industry's high-end product line, becoming a typical example of the deep integration of university research achievements and segmented industries.