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Surface treatment method of gear for wave reduction gear mechanism

一种减速齿轮、表面处理的技术，应用在外齿齿轮领域，能够解决塑性变形性降低、无法取得机械强度、加工困难等问题，达到齿轮寿命延长、安静操作噪音、实现消声效果的效果

Active Publication Date: 2020-04-14
FUJI KIHAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, when cold working such as stamping or drawing is included in the gear manufacturing process, if a material with a high carbon content and high hardness is selected as a starting material, this results in a decrease in plastic deformation required when cold working is performed, making This processing becomes difficult
On the other hand, if a starting material with a low carbon content is chosen to enable cold working, the final finished article thus obtained will not achieve the required mechanical strength

Method used

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  • Surface treatment method of gear for wave reduction gear mechanism
  • Surface treatment method of gear for wave reduction gear mechanism
  • Surface treatment method of gear for wave reduction gear mechanism

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Experimental program
Comparison scheme
Effect test

Embodiment

[0100] Test purposes

[0101] Differences in the respective surface states of external gears used in wave reduction gear mechanisms formed of different materials were confirmed for the case of surface treatment of external gears using the method of the present invention (first process and second process) The case of ; the case of only the shot peening corresponding to the second process of the present invention for the external gear; and the case of no treatment.

[0102] processing conditions

[0103] processing object

[0104] Externally toothed gears (each heat-treated product with a diameter of 60 mm) for a wave reduction gear mechanism were prepared as processing objects. External gears are made of SCM435H (0.32%-0.39% carbon content), SCM440H (0.37%-0.44% carbon content) and SNCM439 (0.36%-0.47% carbon content).

[0105] Jetting conditions

[0106] The particle ejection conditions are given in Table 3 below.

[0107] table 3

[0108]

[0109] Materials and Treat...

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Abstract

A surface treatment method of a gear for a wave reduction gear mechanism includes steps of using a gear for the wave reduction gear mechanism as a workpiece, wherein the gear is formed of steel for amechanical structure containing at least 0.2% carbon, and is subjected to heat treatment after cutting; carrying out a first step, spraying carbide particles onto the surface of the workpiece to remove machining traces on the surface of the workpiece and allow elemental carbon in the carbide particles to diffuse and penetrate into the surface of the gear; and performing a second process after thefirst process, spraying spherical particles onto the surface of the workpiece, so that the internal residual compressive stress on the surface of the gear is increased by at least 50 MPa.

Description

technical field [0001] The present invention relates to a surface treatment method for gears used in wave reduction gear mechanisms. More specifically, the present invention relates to a surface treatment method for a gear for a wave reduction gear mechanism, which method is particularly suitable for an externally toothed gear that is elastically deformed during use, among gears used in a wave reduction gear mechanism. Background technique [0002] Refer below figure 1 with figure 2 , the configuration of the wave reduction gear mechanism 1 processed by the surface treatment method of the present invention will be described. The wave reduction gear mechanism 1 includes a rigid internally toothed gear 2 also called a circular rack, a flexible externally toothed gear 3 meshing with the internally toothed gear 2 also called a flexible rack, and an externally toothed gear also called a wave generator 3. An elliptical wave generator 4 that rotates inside. [0003] The extern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/00
CPCB24C1/00B24C1/08B24C1/10B24C3/32C21D7/06C21D9/32C21D2261/00C22C38/00C22C38/04C22C38/22C22C38/44C23C8/66F16H49/001F16H55/06F16H2049/003C23C8/80
Inventor 宫坂四志男
Owner FUJI KIHAN CO LTD
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