Определение напряжений в процессе снятия фаски резкой в штампах на листовых заготовках перед сваркой

Abstract

Рассмотрены основные прогрессивные методы разделки скосов и снятия фасок на листовых заготовках перед сваркой. Определено напряженно-деформированное состояние системы «нож-заготовка» в штампах с симметричным нагружением и штампах со скользящим пуансоном. Осуществлен выбор более рациональной схемы резки по наименьшим нагрузкам, действующим на инструмент. Проведен расчет бандажирования при использовании твердосплавных вырубных матриц.

There are examined the basic methods of incorporation of slopes and chamfering before welding. The principal difference between the schemes is the original location of the worKhPIece, the geometry of the cutting edge and the direction of movement of the punch committed. The aim of the study is to determine the stress-strain state of the "knife- worKhPIece" and the choice of a rational scheme of cutting through the smallest load acting on the tool. Comparison of the parameters of the stress-strain state under various schemes chamfering performed by modeling using the software package ANSYS / LS-DYNA. The result of the calculations are obtained diagrams of the distribution of equivalent stress, graphs of the stress on the cutting edge of the tool at the time, as well as visualization of chamfering. The results suggest that in terms of the stability of die tooling and quality of the design elements, more rational scheme of cutting punch which performs translational motion simultaneously in two directions – horizontal and vertical. The numerical simulation found that cutting on the proposed scheme reduces the stresses on the cutting edge of the punch more than 400 MPa and worKhPIece distortion is eliminated and the formation of burrs. The calculation of banding when using carbide punching dies.