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Slotting method for herringbone gears with narrow clearance grooves

A technology of herringbone gears and processing methods, which is applied in the direction of belts/chains/gears, gear teeth, and components with teeth, etc., which can solve problems such as large processing errors, unstable processing quality, and inability to guarantee the accuracy requirements of gears. Achieve the effect of high processing precision and stable quality

Inactive Publication Date: 2016-01-13
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

When setting the tool, the tool is only set by the operator's naked eyes, the processing quality is unstable, the processing error is relatively large, and the error of the median value is more than 0.3mm, which cannot meet the machining accuracy of aviation high-precision gears. For hard gears with infiltrated layers on the tooth surface , it is impossible to guarantee the gear alignment accuracy requirements before heat treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Carry out slotting processing on a certain type of aviation herringbone gear, the outer diameter of the part is 131mm, and the gear alignment value is required to be ≤0.1mm. The specific implementation steps include:

[0036] 1. Part line drawing: draw a line along the axis direction on the outer circle of the gear blank, and run through the two gears, as a tool for machining;

[0037] 2. Parts installation and alignment: install the gear blank on the workbench of the helical gear machine, and make the coaxiality between the blank's rotary axis and the worktable's rotary axis less than 0.01mm, and the parallelism between the upper end surface of the blank and the worktable surface is less than 0.01mm;

[0038] 3. Machining the upper gear: on the CNC helical gear shaping machine, the tool setting is performed based on the line drawn on the outer circle of the gear blank, and the gear is slotted to the full height of the tooth;

[0039] 4. Process the gear at the other e...

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Abstract

The invention relates to a slotting method for herringbone gears with narrow clearance grooves. In the machining process, machining parameters are corrected by detecting the deviation of the center angles of tooth grooves of two gears, inverse compensation is carried out to reduce the deviation of the center angles of the tooth grooves of two gears, and then the centring value of the herringbone gears can be obtained through mathematical transformation. According to the invention, the centring value of the herringbone gears with the diameter of the outer circles greater than 500 mm can be controlled within 0.1 mm.

Description

technical field [0001] The invention relates to a slotting processing method of a herringbone gear with a narrow hollow tool. Background technique [0002] The herringbone gear transmission mechanism is usually used in the reducer mechanism of a large turboprop engine. During high-speed and heavy-duty transmission, the tooth top and dedendum trimming can effectively improve the meshing properties, reduce the meshing impact, reduce noise, and load Compared with the helical gear, it has higher load capacity, lower noise and vibration, etc. It can also effectively reduce the number of transmission pairs, and make the reducer obtain the smallest overall size and weight. Due to its structural superiority, the herringbone gear, especially the narrow hollow sipe, is gradually favored by the aviation field because of its more compact structure. [0003] In terms of design requirements, the herringbone gear increases the requirement of the neutrality of the two gears compared with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F7/00
Inventor 黄啸张阳赵季赋于加辉丁明亮关云超
Owner HARBIN DONGAN ENGINE GRP
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