The dataset includes records addressing workpiece heights exceeding 1,000 mm, a regime unique to high-speed WEDM (HS-WEDM) with reciprocating wire motion. The 2023 literature on multi-channel discharge distribution specifically documents this super-high-thickness regime and identifies fundamental circuit redesign requirements for voltage equalization at this scale.

In this dataset, Seibu Electric & Machinery Co., Ltd. (Japan) holds 9 patent records focused on welded-spot workpiece retention across US, EP, and HK jurisdictions. Mitsubishi Electric Corporation (Japan) holds 8 records with the broadest coverage, from foundational offset methods (1991) to multi-wire slicing (2016–2019) and compressive sensing wire control (2025).

Hybrid WEDM-ECM combines wire EDM rough cutting across full section depth in materials such as Inconel 718 and Inconel 625, followed by a wire ECM or electrochemical trimming (Wire ET) pass to remove the recast layer and heat-affected zone. This is driven by aerospace and turbine manufacturing surface integrity requirements — including fatigue strength certification and zero recast layer. The 2026 Nanjing University patent extends this to mathematically controlled trimming across curved and complex thick-section profiles.

Multi-wire EDM slicing winds a single wire across multiple guide rollers to simultaneously cut thick cylindrical ingots (silicon, SiC, germanium, diameters 75–200+ mm) into hundreds of thin wafers. The Indian Institute of Technology’s 2022 IN patent describes molybdenum wire achieving 40 µm kerf width and 100–200 µm wafer thickness, representing a 200–300% kerf loss reduction over conventional abrasive methods. Mitsubishi Electric holds multiple active US patents (2016–2023) covering multi-wire power delivery and shape correction.

Barrel-shaped deformation arises because flushing degradation in the rough pass creates a non-uniform cut profile across the section height — the cut widens at the center where debris accumulates and discharge becomes more intense. Trim passes redistribute discharge energy to correct this geometrical error. Dual-axial ultrasonic vibration assistance applied at the wire guide (documented in a 2020 literature record) directly targets both barrel-shaped deformation and wire breakage in thick cuts.

The 2025 Mitsubishi Electric US patent introduces encoded illumination and compressive sensing to reconstruct wire electrode position at rates exceeding the camera acquisition rate. For thick-section cutting, where wire deflection and vibration are acute, this high-bandwidth positional feedback capability signals a shift from passive wire monitoring toward active closed-loop wire geometry control — expected to become a competitive differentiator in thick-section cutting accuracy within the next product generation cycle.