Why does metal warp during wire cutting? An explanation of the processing steps considering residual stress and deformation.
阪神精工
Hanshin Seiko Co., Ltd. has published a technical article titled "Did the Metal Warp When Cut by Wire EDM? Unexpected Deformations in Precision Machining."
Even with wire cutting, which does not apply cutting forces from blades, the balance of residual stress within the material changes due to the cutting process, potentially leading to warping, distortion, and the opening and closing of slits.
The article shares our experience of rapid movement of the material during the splitting of large rings. It explains key points for considering processes with anticipated deformations, such as the material's processing history, cutting sequence, fixation methods, retention after separation, and measurements during processing.
Additionally, it discusses the differentiation of deformations caused by fixation and the thermal effects of discharge, as well as accuracy checks in both fixed and removed states.
If you are facing issues with machining thin plates, elongated parts, or rings, or dealing with warping after cutting, please consult us with your drawings, material and heat treatment history, required precision, and any documentation of past deformation situations.

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This presentation explains warping and distortion caused by residual stress, incorporating experiences from the division of large rings. It introduces key points to check regarding material history, fixation methods, processing order, and measurement conditions.




