Open AccessResearches, studies and development prospects of the quality of metallic parts made on CNC
Author(s) -
N. Popescu,
I. Tempea
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/997/1/012057
Subject(s) - bending , punching , bent molecular geometry , quality (philosophy) , mechanical engineering , sheet metal , surface finish , plane (geometry) , vibration , structural engineering , surface roughness , engineering drawing , computer science , materials science , engineering , composite material , geometry , mathematics , acoustics , physics , quantum mechanics
The quality of products is an important economic indicator. The paper presents studies, researches and development of prospects execution of bent metal parts on CNC machines. Through these studies we tried to find answers regarding the quality of products, problems that many companies face. Laborious studies and research proposed for the paper, on determining the drawings of metal parts (the flat plane). The quality and precision of the products, may influenced by the other variables: the vibrations of machines, tool usage, tolerance between the surface of the bending tools, variation of the temperature during the processes of punching and bending, their usage and the roughness of the metal sheet. The calculations of the drawing pieces must include the bending coefficients K î . The bending coefficient obtanaited for de steel parts (OL 37) with a thickness of 1 mm, was the subject of the present paper. This coefficient Kî depends on: the type of the material, the chemical composition, the degree of complexity and the number of bends, the movement between the piece and punching or bending tools, vibrations of the machines and other variables. The bending coefficient was obtained by experimental tests and measurements.