Finite element modeling method for forged steel piston

Abstract

The invention discloses a finite element modeling method for a forged steel piston, which comprises the following steps: 1) establishing a three-dimensional model of the piston, and manufacturing a piston ring body and a piston body together, with the upper part being a welding area and the lower part being a matching area; 2) dividing the piston ring body into an upper part and a lower part at any part of the piston ring body by using a dividing surface; 3) importing the built piston three-dimensional model into finite element analysis software, adhering the upper part and the lower part of the piston ring body together by using a Boolean adhesion command, adding the upper part and the piston body of the piston ring body by using a Boolean addition command, and dividing grids; performingfollow-up loading calculation, establishing contact for the matching area, and reflecting the matching relation between the two sides of the matching area. According to the invention, the connection relation between the welding area and the matching area of the single-welding-seam laser welding integral forged steel piston can be truly presented, subsequent analysis and calculation are facilitated, and the analysis result is more accurate.

Description

technical field [0001] The invention relates to the field of finite element analysis and modeling, in particular to a finite element modeling method for a forged steel piston. The invention can accurately reflect the connection mode of a welding zone and a mating zone in a single welding seam laser welding integral forged steel piston. Background technique [0002] With the requirements of high power, low fuel consumption and low emission, the engine explosion pressure also increases, which puts forward higher requirements for piston performance. Although traditional aluminum pistons are widely used, their performance cannot meet the high-strength requirements of engines in many fields. Using forged steel pistons to replace traditional aluminum pistons is an inevitable choice to improve engine performance. [0003] The single-weld laser-welded integral forged steel piston is one of the commonly used forged steel piston structures. It is structurally composed of two parts: th...

AI Technical Summary

Problems solved by technology

It solves the problem that the finite element modeling method of the single-weld laser welding integral forged steel piston in the prior art cannot truly present the connection relationship between the piston ring body and the body, resulting in inaccurate finite element analysis results and unable to truly reflect the piston ring body The stress and deformation of the connection part with the main body

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