对中衬套

Alignment bushings are precision-engineered cylindrical components installed in die holders or adapter plates to guide and align mating components such as punches, dies, or other tooling elements. They provide exact positional accuracy, reduce lateral forces, prevent misalignment during high-speed operations, and ensure consistent part quality in metal stamping, forming, and assembly processes. These bushings typically feature hardened surfaces and tight tolerances to withstand repetitive loading and maintain dimensional stability.

Alignment bushings operate on the principle of interference fit and precision guidance. They are press-fitted into precisely machined bores in the die holder/adapter plate, creating a rigid mounting point. When mating components (like punches or guide pins) engage with the bushing's inner diameter, the hardened surface provides a low-friction guide path, ensuring axial alignment and preventing radial movement. This minimizes deflection, reduces wear on critical tooling, and maintains consistent tool-to-workpiece positioning throughout the production cycle.