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Arc bevel gear machining method

A processing method and technology of gears, applied in the directions of belts/chains/gears, gear teeth, components with teeth, etc., can solve the problems of reducing processing efficiency, failure of small wheel matching, increasing gear processing time, etc., and achieving good symmetry , the effect of improving processing efficiency

Active Publication Date: 2019-03-08
姚显民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods of modifying the contact area will increase the processing time of the gear and reduce the processing efficiency
And when the contact area is corrected, a large number of small wheels will fail due to matching, and the product qualification rate is not high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1 23Z31

[0039] Example 1 Z23Z31M6.35b32

[0040] Step 1: Look up the table to obtain the height variation coefficient and tangential variation coefficient of the large wheel and the small wheel, and calculate the number of teeth of the crown wheel, the length of the midpoint generatrix, and the overall height of the teeth;

[0041] Table 1 Gleason system, coefficient of variation addendum and root coefficient

[0042] M>1.25, β=35°, fO=0.85, CO=0.188, δ=90°

[0043]

[0044] Helix angle β=35° Transmission ratio i=Z 2 / Z 1 =31 / 23=1.347826, the high variation coefficient ξ=0.18 is obtained by looking up the table

[0045] Table 2 Selection of the nominal diameter of the root spiral bevel gear β35° milling cutter

[0046]

[0047] Nominal diameter of β35° milling cutter: Du12″

[0048] Table 3 Du12″Z23Z31M6.35b32 small wheel and large wheel tooth blank dimensions, axis angle Σ=90° pressure angle α=20° helix angle β=35°fo=0.85, C O =0.188

[0049]

[0050]

[0051] Step...

Embodiment 2

[0074] Standard root N7.5 # Small helical bevel gears. Use double-sided fine cutting knife number N=7.5 (average knife number N7.5 # ) When the cutterhead is processing a spiral bevel gear, one tooth groove of the gear is processed so that the two sides of the tooth groove (concave surface, convex surface) are at the intersection of the pitch cone and the midpoint of the tooth surface, and the helix angle at these two points is nearly equal, β 凸 = β 凹 , the meshing angles are nearly equal. alpha 凸 = α 凹 . In this way, the gear pairs for processing large and small wheels can be conjugated. Use this principle to process spiral bevel gears. There is no need to configure the contact area, according to the cutter number N=7.5 # The helix angle β is adopted, and the general helix angle β is 10° to 20°. To ensure that the midpoint helix angle remains unchanged, the helix angle at the intersection of the midpoints of the concave and convex surfaces is nearly equal by changing...

Embodiment 3

[0120] Standard root 1:1 spiral bevel gear machining method. The standard root 1:1 bevel gear means that the number of teeth, modulus, tooth width, total tooth height, addendum height, helix angle and pressure angle are exactly the same. When processing, use the nominal diameter of the milling cutter, tool number, and wrong tool All the same milling cutter discs are used, and a milling cutter disc is generally used. When machining on a spiral gear machine, the angle of the tool position, the angle of the cutting root taper, and the amount of bed retraction do not need to be changed, but the angle Q of the rocking table of the left and right spiral bevel gears is different. It can be processed by a spiral gear machine, and the ideal conjugative i=1 gear pair can be cut out, without the need for a contact area. The length ratio of the contact area after processing: gears that should be less than 0.7, greater than and close to 0.3. The specific calculation steps are as follows:...

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Abstract

The embodiment of the invention relates to the technical field of gear machining, in particular to a spiral bevel gear machining method. The spiral bevel gear machining method includes the following steps that (1) parameters such as the number of crown wheel teeth are calculated; (2) the nominal diameter of a corresponding milling cutter disc is selected, and an average cutter number and large andsmall wheel cutter numbers of a milling cutter are calculated; (3) the degree of a spiral angle is obtained by looking up a table; (4) parameters such as a dedendum angle corresponding to the large and small wheel cutter number are calculated by looking up the table; (5) parameters such as the large end chord tooth thickness of a large wheel and a small wheel are calculated; (6) the rough and fine cutting cutter position and the cradle test roll are calculated; and (7) parameters such as an oscillation angle are calculated, an arc bevel gear adjustment card is manufactured, and an arc bevel gear is machined according to the adjustment card. According to the arc bevel gear machining method, it is ensured that spiral angles of middle points on the two side faces of arc-shaped teeth are unchanged, the contact area is not required to be adjusted repeatedly during machining of the small wheel, and the gear machining efficiency is improved.

Description

Technical field [0001] The embodiment of the present invention relates to the technical field of gear processing, and specifically relates to a spiral bevel gear processing method. Background technique [0002] There are two types of spiral bevel gears, one is a spiral bevel gear, the axis of the large wheel and the axis of the small wheel intersect; the other is a hypoid spiral bevel gear, the axis of the large wheel and the axis of the small wheel have a certain offset. The world-class companies that produce spiral bevel gears are mainly the American Gleason Company and the Swiss Oregon Company. Spiral bevel gears are widely used in mechanical transmission fields such as automobiles, aviation, and mining due to their large overlap coefficient, strong load-bearing capacity, high transmission ratio, smooth transmission, and low noise. Gleason gear spiral bevel gears are widely used in our country. [0003] With the continuous progress and development of industrial technolo...

Claims

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Application Information

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IPC IPC(8): B23F9/08
CPCB23F9/08
Inventor 姚显民
Owner 姚显民
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