Stamping

About: Stamping is a research topic. Over the lifetime, 22501 publications have been published within this topic receiving 83554 citations.

Novel thermal forming method of high-strength steel plate stamping part

Abstract: The invention relates to a novel thermal forming method of a high-strength steel plate stamping part, belonging to the field of thermal stamping forming. Based on a theory that a boron alloy plate which temporarily contacts with air below 600 DEG C can not generate oxide scales, the invention improves an original thermal stamping forming technology. The novel thermal forming method comprises the following steps: heating the plate to a temperature over a recrystallization temperature; transferring the plate to a cooling cavity chamber with a gas protection atmosphere under an air-isolation condition; cooling the plate to 600 DEG C at a rate faster than 27 DEG C/S; and then, rapidly transferring the plate to a thermal stamping forming die to rapidly form and cool to obtain a high-strength part without oxide scales on the surface. The invention solves the problem that the oxide scales are easy to generate on the surface of the plate at a high temperature condition in the thermal stampingforming process, improves the surface quality and the spraying performance of the part, lightens the cooling pressure of the die, delays the thermal fatigue failure of the die and prolongs the service life of the die.

Method of Universal Formability Analysis in Sheet Metal Forming by Utilizing Finite Element Analysis and Circle Grid Analysis

Abstract: The present invention provides a formability analysis method for sheet metal forming processes with the universal formability technology (UFT) by using finite element analysis (FEA) and circle grid analysis (CGA). This method comprises the processes of processing mechanics data of strains and displacements from a defective formed workpiece obtained from FEA and CGA, creating formability diagrams, calculating formability indexes, identifying formability status through comparing the formability indexes with the formability diagrams, and developing two formability solutions metal forming defects. One is the reliability ranges of the stamping process, which is described with the stamping process window including the formability, material and tooling windows; the other is the solution for stamping defects presented as the amounts of metal flow adjustments and the intervals of the associated stamping variables. The method conducts six types of formability analyses corresponding to the six types of stamping defect concerns: anti-fracturability versus split in stamping, anti-edge-fracturability versus split on stamping edge, anti-wrinklability versus wrinkle, shape-fixability versus shape change, stretchability versus low stretch, and anti-bucklability versus surface soft. This method is applied for the whole die life cycle including the forming die surface design, forming die construction, and stamping production.

Method for making a cooking vessel

Abstract: The article is constituted from a plate produced from a relatively soft first metal (1). It has, on one of its faces, a metallic element (2) in the form of a perforated sheet or a grid produced from a second metal or alloy harder than that of the plate (1). The metallic element (2) is fixed to the plate by drop-forging or stamping in order to embed it, at least partially, in this plate. The article is especially useful as a cooking vessel.