Tooth splicing machining method for machining herringbone gears

Abstract

The invention relates to a tooth splicing machining method for machining herringbone gears. The tooth splicing machining method comprises the following steps: firstly machining two paired helical gears according to an ordinary helical gear machining method; during the gear grinding process of the two paired helical gears after heat treatment, grinding so that the sizes of the common normal lines of the two helical gears are the same, and then engaging the two helical gears according to an engagement principle, so that the axis centers of the two helical gears are connected to form a long straight line, and two circles are formed by taking the respective axis centers of the two helical gears as centers; manufacturing a plug pin hole from two intersection points on one of the helical gears, calculating the other helical gear according to the formula that a is equal to 360 / number of teeth / 2 to obtain the calibration angles of two technological coordinate holes and the left and the right intersection points; manufacturing the left and the right technological coordinate holes in the helical gears; after the two helical gears are spliced, splicing the two gears by inserting positioning pins in the left and the right plug pin holes which are overlapped and the two technological coordinate holes; then linearly cutting internal keyways of the central axle holes of the two helical gears to manufacture the two paired helical gears.

Description

technical field [0001] The invention relates to a splicing processing method for processing herringbone gears, belonging to the technical field of gear manufacturing. Background technique [0002] Involute herringbone gears that need spliced ​​teeth such as figure 1 As shown, it requires that the tooth slots or tooth thicknesses of the A gear and the B gear with two split teeth are aligned with each other, and the symmetry error of the tooth slots or tooth thickness of the two gears should be less than 0.03mm; the existing technology generally adopts such as figure 2 The method shown, wherein the machining method of the gear is: [0003] ①Install the gear on the dummy shaft before hobbing; ②Roll one end of the tooth profile; ③Align the platform with the V-shaped iron; ④Remove the workpiece and put it on the V-shaped iron for alignment; ⑤Color the relevant surface; Draw the relevant points A, B, C, D on the cylindrical surface of one end of the gear with good tooth shape, ...

AI Technical Summary

Problems solved by technology

[0005] First, the accuracy of the dummy shaft directly affects the accuracy of the gear;

[0006] The second is through the positioning of the keyway and the cylindrical surface. After the tooth is assembled, the tooth error scale can only reach an accuracy of about 0.05mm, and the product qualification rate is less than 50%;

[0007] The third is that multiple times of tool setting are required during gear grinding, and the workbench needs to be moved frequently, resulting in low processing efficiency;

[0008] Fourth, it is not suitable for mass production;

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