Method of grinding and processing gear wheel

A processing method and gear grinding technology, applied to hardened tooth surfaces, can solve the problems of restricting the precision of spiral bevel gears, high cost of grinding teeth, and lack of finishing process, so as to reduce the degree of unevenness of roughness and abrasive grain scratches, Effect of increasing cutting length and efficiency and improving surface integrity

Inactive Publication Date: 2008-10-01
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the level of gear manufacturing technology has been difficult to meet the production requirements of high-precision gear products. It is imperative to further improve the level of gear finishing and introduce special processing and compound processing methods in the field of gear manufacturing.
[0003] For example, after milling of small modulus spiral bevel gears, due to cost and efficiency reasons, there is no corresponding finishing process, resulting in large transmission noise

Method used

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  • Method of grinding and processing gear wheel
  • Method of grinding and processing gear wheel
  • Method of grinding and processing gear wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Ultrasonic grinding of spiral bevel gears (1)

[0038] Select two pairs of steel spiral bevel gears, as attached Figure 1 As shown, the modulus is 1.25mm, the gear ratio is 17 / 44, the tooth surface hardness of the large wheel is 48HRc, and that of the small wheel is 50HRc.

[0039] The abrasive is mixed with water and white corundum, the concentration is 25%, and the supply rate is 65.3mL / s. Choose W40# white corundum

[0040] The frequency f=19kHz of the ultrasonic tooth grinding, because the gear to be ground is relatively small, the amplitude of the small end face of the small wheel is adjusted to A1=8μm.

[0041] The rotational speed of the driving gear during processing is 600r / min, the braking torque applied to the driven gear is 0.2Nm, and the grinding time is 2min. According to the weight loss of the gears before and after grinding, the material removal rate was measured to be 87.3mg / min.

Embodiment 2

[0042] Example 2: Ultrasonic grinding of spiral bevel gears (2)

[0043] Select two pairs of steel spiral bevel gears, and the gear parameters are the same as in Example 1.

[0044] The abrasive is mixed with water and white corundum, the concentration is 20%, and the supply rate is 65.3mL / s. Choose W40# white corundum.

[0045] The frequency f=19kHz for ultrasonic tooth grinding, and the amplitude of the small end face of the small wheel is adjusted to A1=8μm.

[0046] The rotational speed of the driving gear during processing is 200r / min, the braking torque applied to the driven gear is 0.12Nm, and the grinding time is 2min. According to the weight loss of the gears before and after grinding, the material removal rate was measured to be 132.0mg / min.

Embodiment 3

[0047] Example 3: Ultrasonic Grinding of Spiral Bevel Gears (3)

[0048] Select two pairs of steel spiral bevel gears, and the gear parameters are the same as in Example 1.

[0049] The abrasive is made by mixing water and W40# white corundum, the concentration is 20%, and the supply rate is 65.3mL / s.

[0050] The frequency f=19kHz for ultrasonic tooth grinding, and the amplitude of the small end face of the small wheel is adjusted to A1=8μm.

[0051]The rotational speed of the driving gear during processing is 400r / min, the braking torque applied to the driven gear is 2.0Nm, and the grinding time is 3min. According to the weight loss of the gears before and after grinding, the material removal rate was measured to be 65.0mg / min.

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Abstract

The invention relates to a technique and a method for the finishing processing of gears, in particular to the lapping processing of hypoid gears and spiral bevel gears which have complicated tooth shapes and hard tooth surfaces. The lapping processing method comprises the steps as follows: (1) a pair of gears that need going through lapping processing and comprise a driving gear and a driven gear are assembled together in a way of meshing transmission, the driven gear is driven by the driving gear to carry out rotation movement; (2) preset brake torque is applied on the driven gear; (3) high frequency vibration is applied on the driving gear and/or the driven gear. Highly efficient but low cost lapping processing can be carried out by the method to various gears with the hard tooth surfaces, particularly small modulus gears so as to improve the meshing precision of the gears and reduce vibration and noise in transmission.

Description

technical field [0001] The invention relates to a process and a method for finishing and finishing gears, in particular to the grinding process of complex tooth shapes and hard tooth surfaces, such as hypoid gears and spiral bevel gears. Background technique [0002] Gear is a key component of mechanical transmission, and its machining accuracy and manufacturing level are directly related to the performance and quality of mechanical products. With the development of the machinery industry and the advancement of science and technology, many industrial sectors have higher and higher requirements for the performance of gear products, which promotes the development of gear products in the direction of high precision, high speed, high strength, low noise and miniaturization. At present, the level of gear manufacturing technology has been difficult to meet the production requirements of high-precision gear products. It is imperative to further improve the level of gear finishing a...

Claims

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Application Information

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IPC IPC(8): B23F19/02B23F23/00B24B1/04B24B35/00B24B57/00C09K3/14
Inventor 魏冰阳邓效忠杨建军
Owner HENAN UNIV OF SCI & TECH
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