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Noise prediction method

A prediction method and noise technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the inability to predict the size of noise

Active Publication Date: 2015-04-15
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, in the past, even though it was known that the noise was caused by the poor meshing of the resin gear pair, how to evaluate the bad meshing and how to combine this evaluation with the magnitude of the noise was unknown.
Therefore, it is impossible to predict the magnitude of the noise due to the meshing of the resin gear pair

Method used

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Embodiment

[0113] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to this.

[0114] The relationship between noise level and normal pitch difference

[0115] exist Figure 7 shows the relationship between the normal pitch difference between meshed resin gears and the noise level (dB). In order to find out Figure 7 The resin gear used in the relationship shown is a resin gear formed by molding polyacetal resin ("M90-44", manufactured by Polyplastics Co., Ltd.). The specification of the resin gear is about 1.0 modulus, about 30 mm pitch circle radius, 30 teeth, and about 15 mm tooth width. Figure 7 The points in represent the relationship between the normal pitch difference between the resin gears of the resin gear pair and the magnitude of the noise. The normal pitch of the resin gear adopts the value of the normal pitch obtained from the roundness measurement.

[0116] Specifically, the relationship between the magnitude of ...

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Abstract

The invention provides a noise prediction method which predicts noise generated when a resin gear is engaged. The noise generated when the resin gear is engaged is predicted by means of a first relation exporting program, a second relation exporting program when necessary, a maximal radius position modulus exporting program, a gear normal pitch exporting program, an opposite gear normal pitch exporting program, and a noise prediction program. Gear modulus at an engaging position of the resin gear is exported. The normal pitch of two gears is exported based on the modulus at the engaging position, and the difference of the normal pitch is calculated. The noise level is predicted based on the relation between the normal pitch difference and the noise level.

Description

technical field [0001] The present invention relates to a noise prediction method for predicting the magnitude of noise generated when a pair of resin gears mesh. Background technique [0002] Gears are one of the important mechanical parts that mainly transmit power and rotation. Conventionally, gears were manufactured by cutting and sintering metals. Metal gears as described above have the disadvantages of being expensive to manufacture, heavy, and generally require grease for lubrication. Therefore, in recent years, resin gears that can be extremely easily manufactured by injection molding or the like have attracted attention. Resin gears are lightweight, have high vibration absorption, and can be used without oil, so they are used in a wide range of fields instead of metal gears. [0003] However, as the use of resin gears expands, cases where resin gears are used at high speeds are also increasing. Furthermore, there is a tendency to advance the miniaturization of r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 长永昭宏
Owner POLYPLASTICS CO LTD