A precision cylindrical pin used in positioning fixtures to accurately locate and secure workpieces during machining, assembly, or inspection operations.
A locating pin is a hardened, ground cylindrical component designed to establish precise positional relationships between workpieces and fixtures. It ensures repeatable positioning by engaging with corresponding holes or slots in the workpiece, eliminating degrees of freedom and maintaining dimensional accuracy throughout manufacturing processes. These pins are critical for maintaining tolerances in jigs, fixtures, and modular tooling systems.
诱因 → 失效模式 → 工程缓解
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While both are cylindrical pins, locating pins are specifically designed for precision positioning in fixtures with tighter tolerances and often feature chamfers or reliefs for easier insertion. Dowel pins are typically used for permanent alignment of machine components.
Select based on workpiece hole size, required precision, and load conditions. Use slip fits (H7/h6) for easy insertion or transition fits (H7/k6) for more precise location. Consider diameter-to-length ratio for stability.
Standard steel pins are suitable up to approximately 200°C. For higher temperatures, consider stainless steel (up to 400°C) or specialized alloys. Thermal expansion coefficients must be considered for precision applications.
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