Surface roughness formation during shot peen forming

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Koltsov, V.P.^1 ; Vinh, Le Tri^1 ; Starodubtseva, D.A.^1

Irkutsk National Research Technical University, Lermontov Street 83, Irkutsk

664074, Russia^1

关键词: Arithmetic mean;    Basic surface;    Chaotic distributions;    Complex structure;    Degree of coverages;    Experimental testing;    Model validity;    Random roughness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/4/042125/pdf
DOI  :  10.1088/1757-899X/327/4/042125

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Shot peen forming (SPF) is used for forming panels and skins, and for hardening. As a rule, shot peen forming is performed after milling. Surface roughness is a complex structure, a combination of an original microrelief and shot peen forming indentations of different depths and chaotic distribution along the surface. As far as shot peen forming is a random process, surface roughness resulted from milling and shot peen forming is random too. During roughness monitoring, it is difficult to determine the basic surface area which would ensure accurate results. It can be assumed that the basic area depends on the random roughness which is characterized by the degree of shot peen forming coverage. The analysis of depth and shot peen forming indentations distribution along the surface made it possible to identify the shift of an original center profile plane and create a mathematical model for the arithmetic mean deviation of the profile. Experimental testing proved model validity and determined an inversely proportional dependency of the basic area on the degree of coverage.