Press Processing Problem Solving Case: Shearing Process

Introduction of a case study on the technology for creating slits with a width of 0.18mm in a plate thickness of 0.3mm.

Shear processing is widely used in press working, but it can pose various challenges depending on processing conditions, such as issues with burr management and shear surface accuracy, scrap handling, curvature of products requiring flatness, twisting or bending of narrow cutouts, and insufficient tool durability. At Yamazaki Industrial Co., Ltd., we are continuously developing individual countermeasures for each of these issues and promoting widespread standardization among our engineers. Our products include copper strips for lead frames (equivalent to CDA15100) with a thickness of 0.3mm, which are shear processed with slits measuring 0.18mm, representing 60% of the sheet thickness. The material hardness is approximately 140Hv. Typically, punches as thin as 0.18mm cannot ensure sufficient strength, and considering mass production, it becomes necessary to widen the slit width. At Yamazaki Industrial Co., Ltd., we enhance mold precision and reconsider the structure of the relevant parts, enabling shear processing of slits and holes that are finer and thinner than the sheet thickness. For more details, please contact us or refer to our catalog.

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