剪切形成的面称为截面，通过调查此处的形状，可了解凸模和凹模的间隙（缝隙）等状态。 因此，本项将说明剪切加工的基础知识和塌角的发生原理。 此外，还介绍包括塌角在内的剪切面测量课题与解决方法。 塌角是剪切加工产品的表面上发生的现象。 这种现象表现为，在通过凸模和凹模切断加工材料时，截面上产生的拉伸力会拉伸加工材料，使表面变得光滑。 其大小和形状根据凸模和凹模的间隙（缝隙）而变化。 此外，凸模和凹模的间隙对产品质量和冲压加工机的使用寿 …

Shear droop is a phenomenon that occurs on the surface of a product that was machined by shearing. When the machined material is cut using a punch and die, the material is pulled by the tensile force produced on the cut surface, producing a smooth surface.

2025年1月1日 · (a) Closs-sectional view of shear processing, (b) magnified view of deformation area of (a), and (c) schematic diagram of machined cross section, which is divided into four parts: (i) shear droop, (ii) sheared face, (iii) broken face, and (iv) burrs.

2018年1月1日 · A large shear droop generated in the convex portions of blanked components leads to functional problems, such as a decrease in the effective thickness of gear parts. In this study, the cause of this issue was investigated by comparing half-blanked workpieces with circular and rhombic profiles.

The shear droop is associated with the initial compression by and the subsequent clearance of the punches and dies. Results are obtained for various clearances and initial compressions in the fine-blanking process for high-strength steel, and the …

2017年1月1日 · However, the convex portion of the punched out part or product will generally include a large amount of die-roll or shear-droop defined by a component (Z) in the shear plane direction (z-direction) as well as in the planar direction (x-direction).

A large shear droop generated in the convex portions of blanked components leads to functional problems, such as a decrease in the effective thickness of gear parts.

The shear droop is associated with the initial compression by and the subsequent clearance of the punches and dies. Results are obtained for various clearances and initial compressions in the fine-blanking process for high-strength steel, and the …

In common punching operations, the cut surface is formed in the material in the sequence of droop → shear cross-section → fracture cross-section → burr, as shown in Fig. 1.

The shear droop is associated with the initial compression by and the subsequent clearance of the punches and dies. Results are obtained for various clearances and initial compressions in the fine-blanking process for high-strength steel, and the …