Title:
METHOD FOR CALCULATING ACTUAL CONTACT RATIO OF THERMOPLASTIC RESIN GEAR, METHOD FOR DERIVING COEFFICIENT OF FRICTION OF THERMOPLASTIC RESIN GEAR, METHOD FOR PREDICTING TOOTH ROOT TEMPERATURE OF THERMOPLASTIC RESIN GEAR, AND METHOD FOR PREDICTING SERVICE LIFE OF THERMOPLASTIC RESIN GEAR
Document Type and Number:
WIPO Patent Application WO/2024/005161
Kind Code:
A1
Abstract:
This method for calculating an actual contact ratio of a thermoplastic resin gear includes: a step 1 for measuring a temperature distribution of a pair of gears; a step 2 for employing CAE structural analysis to calculate a temperature distribution of a structural analysis model A having the same shape as the pair of gears; a step 3 for preparing temperature dependency data of a modulus of elasticity a of a thermoplastic resin; a step 4 for performing, in any order, a step 4a for correcting the modulus of elasticity a in accordance with a strain rate dependency, and a step 4b for correcting the modulus of elasticity a in accordance with an actual amount of deformation of the gears; a step 5 for using a modulus of elasticity a' after correction to calculate a contact stress distribution by means of CAE structural analysis; a step 6 for calculating an angular difference from a start point to an end point of meshing of the pair of gears on the basis of the contact stress distribution; and a step 7 for calculating the actual contact ratio of the pair of gears from the angular difference.
Inventors:
MATSUMURA TAKUMA (JP)
MIOKI KOHSHI (JP)
KADA MASAHIRO (JP)
POGACNIK ALJAZ (SI)
MIOKI KOHSHI (JP)
KADA MASAHIRO (JP)
POGACNIK ALJAZ (SI)
Application Number:
PCT/JP2023/024256
Publication Date:
January 04, 2024
Filing Date:
June 29, 2023
Export Citation:
Assignee:
POLYPLASTICS CO (JP)
BAUHAR ALJAZ POGACNIK S P (SI)
BAUHAR ALJAZ POGACNIK S P (SI)
International Classes:
G01M13/021
Foreign References:
| JP2002243590A | 2002-08-28 | |||
| KR20230029132A | 2023-03-03 |
Other References:
TAKAHASHI, HIDEO ET AL.: "Deformation of injection molded plastic spur gears", 2001 THE JAPAN SOCIETY FOR PRECISION ENGINEERING AUTUMN CONFERENCE ACADEMIC LECTURE PROCEEDINGS, 2001, pages 95
YOKOYAMA, SHUNSUKE ET AL.: "Study on calculation formula of gear tooth strength of molded plastic gear", PROCEEDINGS OF JSPE SEMESTRIAL MEETING 2000, JAPAN SOCIETY FOR PRECISION ENGINEERING AUTUMN CONFERENCE; SENDAI, JAPAN; OCTOBER 7-9, 2000, 1 January 2000 (2000-01-01) - 9 October 2000 (2000-10-09), pages 210, XP009552279
CERNE B. ET AL.: "Thermo-mechanical modeling of polymer spur gears with experimental validation using high-speed infrared thermography", MECHANISM AND MACHINE THEORY, PERGAMON, AMSTERDAM, NL, vol. 146, 30 December 2019 (2019-12-30), AMSTERDAM, NL , XP086006218, ISSN: 0094-114X, DOI: 10.1016/j.mechmachtheory.2019.103734
UEDA, AKIO; YOSHIHARA, MASAYOSHI; TAKAHASHI, HIDEO; MORIWAKI, ICHIRO: "Computer Simulation on the Heat Generation in Meshing of Plastic Spur Gears (In Case of Plastic Spur Gears Pair)", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS (SERIES C), NIHON KIKAI GAKKAI, TOKYO, JP, vol. 73, no. 732, 1 January 2007 (2007-01-01), JP , pages 183 - 192, XP009552050, ISSN: 0387-5024, DOI: 10.1299/kikaic.73.2357
YOKOYAMA, SHUNSUKE ET AL.: "Study on calculation formula of gear tooth strength of molded plastic gear", PROCEEDINGS OF JSPE SEMESTRIAL MEETING 2000, JAPAN SOCIETY FOR PRECISION ENGINEERING AUTUMN CONFERENCE; SENDAI, JAPAN; OCTOBER 7-9, 2000, 1 January 2000 (2000-01-01) - 9 October 2000 (2000-10-09), pages 210, XP009552279
CERNE B. ET AL.: "Thermo-mechanical modeling of polymer spur gears with experimental validation using high-speed infrared thermography", MECHANISM AND MACHINE THEORY, PERGAMON, AMSTERDAM, NL, vol. 146, 30 December 2019 (2019-12-30), AMSTERDAM, NL , XP086006218, ISSN: 0094-114X, DOI: 10.1016/j.mechmachtheory.2019.103734
UEDA, AKIO; YOSHIHARA, MASAYOSHI; TAKAHASHI, HIDEO; MORIWAKI, ICHIRO: "Computer Simulation on the Heat Generation in Meshing of Plastic Spur Gears (In Case of Plastic Spur Gears Pair)", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS (SERIES C), NIHON KIKAI GAKKAI, TOKYO, JP, vol. 73, no. 732, 1 January 2007 (2007-01-01), JP , pages 183 - 192, XP009552050, ISSN: 0387-5024, DOI: 10.1299/kikaic.73.2357
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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