Spatial Coordinate and Tolerance Control System for Precise Positioning of Embedded Parts in Double-Curved GRC Panels

The positioning accuracy of embedded parts in double-curved GRC panels directly affects installation quality. Qinglong Group controls the spatial coordinate error of embedded parts within ±1.5mm through three principles: "standardized mold positioning benchmarks, digitalized inspection processes, and systematic tolerance allocation." This precise positioning technology is the foundation for ensuring that tens of thousands of specially shaped panels achieve "millimeter-level" splicing.

Mold positioning is the source of precision. When machining molds with CNC, the positioning grooves for embedded parts are machined simultaneously, with a groove depth tolerance of ±0.1mm. A laser tracker is used to inspect the mold surface, establishing a high-precision reference coordinate system. Specialized fixtures are used for embedded part installation to ensure positional repeatability. In the Hainan project, Qinglong Group achieved a 99.8% pass rate for embedded parts through benchmark-based mold design.

Digital inspection provides full-process monitoring. During production, a coordinate measuring machine (CMM) is used for sampling inspection of embedded part positions. An electronic file is created for each panel to record measured data. Before installation, a portable measuring arm is used for re-inspection, and non-conforming products do not leave the factory. Qinglong Group uses SPC (Statistical Process Control) to monitor positioning accuracy trends in real time and promptly detect deviations.

Tolerance allocation is scientific and rational. Tolerances are allocated according to the "minimum cumulative error" principle: mold machining ±0.2mm, embedded part installation ±0.5mm, on-site measurement ±0.8mm. Through error analysis theory, final accuracy is ensured to meet standards. This rigorous tolerance control system provides reliable assurance for the precise installation of double-curved GRC curtain walls.