The Experts below are selected from a list of 28173 Experts worldwide ranked by ideXlab platform

Takao Koide - One of the best experts on this subject based on the ideXlab platform.

  • Load Bearing Capacity of Surface-Rolled Sintered Metal Gears
    International journal of automation technology, 2008
    Co-Authors: Takao Koide, Ichiro Ishizuka, Teruie Takemasu, Kouitsu Miyachika
    Abstract:

    The Load Bearing Capacity of surface-rolled sintered metal gears were investigated. Sintered metal gears were made using hobs with different tooth profiles and surface-rolled to different degrees using two different rolling machines and heat-treated. The effect of surface-rolling on surface properties were examined by measuring porosity and hardness near rolled gear teeth surfaces. Run tests for test gears were conducted. The effects of surface-rolling on the Load Bearing Capacity of sintered metal gears were determined, and the results were compared to the results for wrought steel gears.

  • Effects of Rolling on Load Bearing Capacity of Sintered Metal Gears
    Volume 7: 10th International Power Transmission and Gearing Conference, 2007
    Co-Authors: Takao Koide, Teruie Takemasu, Kouitsu Miyachika, Takatoshi Maemori, Chiaki Namba
    Abstract:

    This paper describes the effects of surface rolling on the Load Bearing Capacity of sintered metal gears. Sintered metal gears and rollers were surface-rolled under various amounts of rolling. The effects of rolling on the surface properties were examined by measuring the porosities and hardness near the surfaces of the rolled gear teeth and rollers. Bending fatigue tests for the surface-rolled sintered metal gears and contact fatigue tests for the rollers were carried out. The effects of the amount of rolling on the Load Bearing Capacity of sintered metal gears and rollers were determined, and these results were compared with the results for as-sintered and wrought steel gears and rollers.

  • Load Bearing Capacity of Super-Carburized Gears
    Volume 4: 9th International Power Transmission and Gearing Conference Parts A and B, 2003
    Co-Authors: Takao Koide, Koji Tsubokura, Chiaki Namba
    Abstract:

    This paper describes a study on the Load Bearing Capacity of super-carburized gears. Test gears and rollers of MAC14 and SCM415 steels were super or eutectoid-carburized under different carburizing conditions. The impact and bending fatigue tests for test gears and the contact fatigue test for test rollers were carried out. The effects of case depths on the impact and bending fatigue strengths of gears and the surface durability of rollers were determined. The impact breaking limit energy of super-carburized gears was found to be larger by about 15% than that of eutectoid-carburized gears irrespective of case depth. The bending fatigue strength of the super-carburized gear was found to be almost equal to that of the eutectoid-carburized gear. The surface durability of the super-carburized roller becomes larger with an increase of case depth and is larger than that of eutectoid-carburized rollers in the case of larger case depth. The surface failure modes for super and eutectoid-carburized rollers were spalling. The Load Bearing Capacity of super and eutectoid-carburized gears was found to become larger by shot-peening.Copyright © 2003 by ASME

Chiaki Namba - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Rolling on Load Bearing Capacity of Sintered Metal Gears
    Volume 7: 10th International Power Transmission and Gearing Conference, 2007
    Co-Authors: Takao Koide, Teruie Takemasu, Kouitsu Miyachika, Takatoshi Maemori, Chiaki Namba
    Abstract:

    This paper describes the effects of surface rolling on the Load Bearing Capacity of sintered metal gears. Sintered metal gears and rollers were surface-rolled under various amounts of rolling. The effects of rolling on the surface properties were examined by measuring the porosities and hardness near the surfaces of the rolled gear teeth and rollers. Bending fatigue tests for the surface-rolled sintered metal gears and contact fatigue tests for the rollers were carried out. The effects of the amount of rolling on the Load Bearing Capacity of sintered metal gears and rollers were determined, and these results were compared with the results for as-sintered and wrought steel gears and rollers.

  • Load Bearing Capacity of Super-Carburized Gears
    Volume 4: 9th International Power Transmission and Gearing Conference Parts A and B, 2003
    Co-Authors: Takao Koide, Koji Tsubokura, Chiaki Namba
    Abstract:

    This paper describes a study on the Load Bearing Capacity of super-carburized gears. Test gears and rollers of MAC14 and SCM415 steels were super or eutectoid-carburized under different carburizing conditions. The impact and bending fatigue tests for test gears and the contact fatigue test for test rollers were carried out. The effects of case depths on the impact and bending fatigue strengths of gears and the surface durability of rollers were determined. The impact breaking limit energy of super-carburized gears was found to be larger by about 15% than that of eutectoid-carburized gears irrespective of case depth. The bending fatigue strength of the super-carburized gear was found to be almost equal to that of the eutectoid-carburized gear. The surface durability of the super-carburized roller becomes larger with an increase of case depth and is larger than that of eutectoid-carburized rollers in the case of larger case depth. The surface failure modes for super and eutectoid-carburized rollers were spalling. The Load Bearing Capacity of super and eutectoid-carburized gears was found to become larger by shot-peening.Copyright © 2003 by ASME

Kouitsu Miyachika - One of the best experts on this subject based on the ideXlab platform.

  • Load Bearing Capacity of Surface-Rolled Sintered Metal Gears
    International journal of automation technology, 2008
    Co-Authors: Takao Koide, Ichiro Ishizuka, Teruie Takemasu, Kouitsu Miyachika
    Abstract:

    The Load Bearing Capacity of surface-rolled sintered metal gears were investigated. Sintered metal gears were made using hobs with different tooth profiles and surface-rolled to different degrees using two different rolling machines and heat-treated. The effect of surface-rolling on surface properties were examined by measuring porosity and hardness near rolled gear teeth surfaces. Run tests for test gears were conducted. The effects of surface-rolling on the Load Bearing Capacity of sintered metal gears were determined, and the results were compared to the results for wrought steel gears.

  • Effects of Rolling on Load Bearing Capacity of Sintered Metal Gears
    Volume 7: 10th International Power Transmission and Gearing Conference, 2007
    Co-Authors: Takao Koide, Teruie Takemasu, Kouitsu Miyachika, Takatoshi Maemori, Chiaki Namba
    Abstract:

    This paper describes the effects of surface rolling on the Load Bearing Capacity of sintered metal gears. Sintered metal gears and rollers were surface-rolled under various amounts of rolling. The effects of rolling on the surface properties were examined by measuring the porosities and hardness near the surfaces of the rolled gear teeth and rollers. Bending fatigue tests for the surface-rolled sintered metal gears and contact fatigue tests for the rollers were carried out. The effects of the amount of rolling on the Load Bearing Capacity of sintered metal gears and rollers were determined, and these results were compared with the results for as-sintered and wrought steel gears and rollers.

Teruie Takemasu - One of the best experts on this subject based on the ideXlab platform.

  • Load Bearing Capacity of Surface-Rolled Sintered Metal Gears
    International journal of automation technology, 2008
    Co-Authors: Takao Koide, Ichiro Ishizuka, Teruie Takemasu, Kouitsu Miyachika
    Abstract:

    The Load Bearing Capacity of surface-rolled sintered metal gears were investigated. Sintered metal gears were made using hobs with different tooth profiles and surface-rolled to different degrees using two different rolling machines and heat-treated. The effect of surface-rolling on surface properties were examined by measuring porosity and hardness near rolled gear teeth surfaces. Run tests for test gears were conducted. The effects of surface-rolling on the Load Bearing Capacity of sintered metal gears were determined, and the results were compared to the results for wrought steel gears.

  • Effects of Rolling on Load Bearing Capacity of Sintered Metal Gears
    Volume 7: 10th International Power Transmission and Gearing Conference, 2007
    Co-Authors: Takao Koide, Teruie Takemasu, Kouitsu Miyachika, Takatoshi Maemori, Chiaki Namba
    Abstract:

    This paper describes the effects of surface rolling on the Load Bearing Capacity of sintered metal gears. Sintered metal gears and rollers were surface-rolled under various amounts of rolling. The effects of rolling on the surface properties were examined by measuring the porosities and hardness near the surfaces of the rolled gear teeth and rollers. Bending fatigue tests for the surface-rolled sintered metal gears and contact fatigue tests for the rollers were carried out. The effects of the amount of rolling on the Load Bearing Capacity of sintered metal gears and rollers were determined, and these results were compared with the results for as-sintered and wrought steel gears and rollers.

Klaus Ludwig - One of the best experts on this subject based on the ideXlab platform.

  • Load Bearing Capacity of all ceramic posterior inlay retained fixed dental prostheses
    European Journal of Oral Sciences, 2009
    Co-Authors: Djamila Puschma, Stefa Wolfa, Klaus Ludwig
    Abstract:

    The purpose of this in vitro study was to compare the quasi-static Load-Bearing Capacity of all-ceramic resin-bonded three-unit inlay-retained fixed dental prostheses (IRFDPs) made from computer-aided design/computer-aided manufacturing (CAD/CAM)-manufactured yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) frameworks with two different connector dimensions, with and without fatigue Loading. Twelve IRFDPs each were made with connector dimensions 3 x 3 mm(2) (width x height) (control group) and 3 x 2 mm(2) (test group). Inlay-retained fixed dental prostheses were adhesively cemented on identical metal-models using composite resin cement. Subgroups of six specimens each were fatigued with maximal 1,200,000 Loading cycles in a chewing simulator with a weight Load of 25 kg and a Load frequency of 1.5 Hz. The Load-Bearing Capacity was tested in a universal testing machine for IRFDPs without fatigue Loading and for IRFDPs that had not already fractured during fatigue Loading. During fatigue testing one IRFDP (17%) of the test group failed. Under both Loading conditions, IRFDPs of the control group exhibited statistically significantly higher Load-Bearing capacities than the test group. Fatigue Loading reduced the Load-Bearing Capacity in both groups. Considering the maximum chewing forces in the molar region, it seems possible to use zirconia ceramic as a core material for IRFDPs with a minimum connector dimension of 9 mm(2). A further reduction of the connector dimensions to 6 mm(2) results in a significant reduction of the Load-Bearing Capacity.

  • Load‐Bearing Capacity of all‐ceramic posterior inlay‐retained fixed dental prostheses
    European journal of oral sciences, 2009
    Co-Authors: Djamila Puschmann, Klaus Ludwig, Stefan Wolfart, Matthias Kern
    Abstract:

    The purpose of this in vitro study was to compare the quasi-static Load-Bearing Capacity of all-ceramic resin-bonded three-unit inlay-retained fixed dental prostheses (IRFDPs) made from computer-aided design/computer-aided manufacturing (CAD/CAM)-manufactured yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) frameworks with two different connector dimensions, with and without fatigue Loading. Twelve IRFDPs each were made with connector dimensions 3 x 3 mm(2) (width x height) (control group) and 3 x 2 mm(2) (test group). Inlay-retained fixed dental prostheses were adhesively cemented on identical metal-models using composite resin cement. Subgroups of six specimens each were fatigued with maximal 1,200,000 Loading cycles in a chewing simulator with a weight Load of 25 kg and a Load frequency of 1.5 Hz. The Load-Bearing Capacity was tested in a universal testing machine for IRFDPs without fatigue Loading and for IRFDPs that had not already fractured during fatigue Loading. During fatigue testing one IRFDP (17%) of the test group failed. Under both Loading conditions, IRFDPs of the control group exhibited statistically significantly higher Load-Bearing capacities than the test group. Fatigue Loading reduced the Load-Bearing Capacity in both groups. Considering the maximum chewing forces in the molar region, it seems possible to use zirconia ceramic as a core material for IRFDPs with a minimum connector dimension of 9 mm(2). A further reduction of the connector dimensions to 6 mm(2) results in a significant reduction of the Load-Bearing Capacity.