Precision Progressive Die Lower Plate Assembly

To ensure strip feeding stability and forming accuracy during high-speed stamping, this lower plate integrates multiple sets of precision guide holes, pockets for irregular inserts, and stripper pin channels. The stepped counterbores and mating slots on its surface provide rigid support and precise alignment for the upper die assembly, directly determining the dimensional consistency of continuous stamped parts and mold life.

The core challenge in manufacturing such plates with multiple holes and complex internal cavities lies in controlling the positional tolerance between installation holes and the flatness of the cavity surfaces to prevent interference or poor fit during assembly. For asymmetric irregular slots and micro pin holes on the plate, high-precision slow wire EDM is used for contour shaping, combined with optical grinding to ensure end-face flatness and perpendicularity, effectively eliminating machining stress.

Supported by dual IATF16949 and ISO9001 certification systems, our production line is equipped with slow wire EDM machines from brands like Sodick and Mitsubishi, as well as Wangpan surface grinders, capable of processing high-hardness materials such as tool steel, alloy steel, and cemented carbide. We perform 100% inspection of key mating dimensions using Mitutoyo vision measuring systems and Hexagon CMMs to ensure batch-to-batch consistency. Quotations are evaluated based on specific 2D/3D drawings, material grades, heat treatment hardness, and expected order volume.