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Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools

Classic methods of machining cylindrical gears, such as hobbing or circumferential chiseling, require the use of expensive special machine tools and dedicated tools, which makes production unprofitable, especially in small and medium series. Today, special attention is paid to the technology of maki...

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Autores principales: Gołębski, Rafał, Boral, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8199005/
https://www.ncbi.nlm.nih.gov/pubmed/34071516
http://dx.doi.org/10.3390/ma14112913
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author Gołębski, Rafał
Boral, Piotr
author_facet Gołębski, Rafał
Boral, Piotr
author_sort Gołębski, Rafał
collection PubMed
description Classic methods of machining cylindrical gears, such as hobbing or circumferential chiseling, require the use of expensive special machine tools and dedicated tools, which makes production unprofitable, especially in small and medium series. Today, special attention is paid to the technology of making gears using universal CNC (computer numerical control) machine tools with standard cheap tools. On the basis of the presented mathematical model, a software was developed to generate a code that controls a machine tool for machining cylindrical gears with straight and modified tooth line using the multipass method. Made of steel 16MnCr5, gear wheels with a straight tooth line and with a longitudinally modified convex-convex tooth line were machined on a five-axis CNC milling machine DMG MORI CMX50U, using solid carbide milling cutters (cylindrical and ball end) for processing. The manufactured gears were inspected on a ZEISS coordinate measuring machine, using the software Gear Pro Involute. The conformity of the outline, the tooth line, and the gear pitch were assessed. The side surfaces of the teeth after machining according to the planned strategy were also assessed; the tests were carried out using the optical microscope Alicona Infinite Focus G5 and the contact profilographometer Taylor Hobson, Talysurf 120. The presented method is able to provide a very good quality of machined gears in relation to competing methods. The great advantage of this method is the use of a tool that is not geometrically related to the shape of the machined gear profile, which allows the production of cylindrical gears with a tooth and profile line other than the standard.
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spelling pubmed-81990052021-06-14 Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools Gołębski, Rafał Boral, Piotr Materials (Basel) Article Classic methods of machining cylindrical gears, such as hobbing or circumferential chiseling, require the use of expensive special machine tools and dedicated tools, which makes production unprofitable, especially in small and medium series. Today, special attention is paid to the technology of making gears using universal CNC (computer numerical control) machine tools with standard cheap tools. On the basis of the presented mathematical model, a software was developed to generate a code that controls a machine tool for machining cylindrical gears with straight and modified tooth line using the multipass method. Made of steel 16MnCr5, gear wheels with a straight tooth line and with a longitudinally modified convex-convex tooth line were machined on a five-axis CNC milling machine DMG MORI CMX50U, using solid carbide milling cutters (cylindrical and ball end) for processing. The manufactured gears were inspected on a ZEISS coordinate measuring machine, using the software Gear Pro Involute. The conformity of the outline, the tooth line, and the gear pitch were assessed. The side surfaces of the teeth after machining according to the planned strategy were also assessed; the tests were carried out using the optical microscope Alicona Infinite Focus G5 and the contact profilographometer Taylor Hobson, Talysurf 120. The presented method is able to provide a very good quality of machined gears in relation to competing methods. The great advantage of this method is the use of a tool that is not geometrically related to the shape of the machined gear profile, which allows the production of cylindrical gears with a tooth and profile line other than the standard. MDPI 2021-05-28 /pmc/articles/PMC8199005/ /pubmed/34071516 http://dx.doi.org/10.3390/ma14112913 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gołębski, Rafał
Boral, Piotr
Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools
title Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools
title_full Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools
title_fullStr Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools
title_full_unstemmed Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools
title_short Study of Machining of Gears with Regular and Modified Outline Using CNC Machine Tools
title_sort study of machining of gears with regular and modified outline using cnc machine tools
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8199005/
https://www.ncbi.nlm.nih.gov/pubmed/34071516
http://dx.doi.org/10.3390/ma14112913
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