Slotting cutter of inverse-tapered spline straight gear and designing method of slotting cutter

A technology of spur gears and inverted cones, which is applied to gear teeth manufacturing tools, gear teeth manufacturing devices, belts/chains/gears, etc., can solve the problems of double-linked gears that are labor-intensive and time-consuming

Inactive Publication Date: 2013-11-20
重庆工具厂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a gear shaper for reverse bevel spline spur gears, which can be used for one-time processing when machining reverse bevel spline spur gears, and can ensure the accuracy of the tooth profile of the reverse bevel spline spur gears. Machining accuracy, thus solving the problem of labor-consuming and time-consuming separate processing of double-linked gears in the past

Method used

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  • Slotting cutter of inverse-tapered spline straight gear and designing method of slotting cutter
  • Slotting cutter of inverse-tapered spline straight gear and designing method of slotting cutter
  • Slotting cutter of inverse-tapered spline straight gear and designing method of slotting cutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1 A reverse taper spline spur gear shaper cutter

[0069] Take the processing of a spur gear with inverted taper splines as an example with the following parameters: number of teeth Z=39, modulus m=1.8, index circle pressure angle α f =20°, graduated circle side relief angle β f =4°, top circle diameter d e =71.45, root circle diameter d i =67, the number of span teeth K=5, the length of the common normal line W K =24.88.

[0070] The basic parameter of the reverse taper spline spur gear shaper cutter described in this embodiment is the number of teeth Z o =56, rake angle γ=5°, addendum relief angle α e =6°, graduation circle diameter d fo = Z o m=100.8, arc tooth thickness S fo =2.696, when ψ satisfies the formula When , the basic parameter of the gear shaper cutter is the indexing circle pressure angle α fo , satisfying the following formula:

[0071]

[0072] According to the basic parameters of the above-mentioned reverse taper spline spur ...

Embodiment 2

[0074] Embodiment 2 A Design Method of Inverted Taper Spline Spur Gear Shaping Cutter

[0075] The present invention provides a design method of a reverse taper spline spur gear shaper cutter 2. The main parameters of the large end face 11 of the reverse taper spline spur gear 1 include the modulus m and the index circle pressure angle α f , Graduated circle side relief angle β f , top circle diameter d e , Pitch circle diameter d f , root circle diameter d i and arc tooth thickness S f , the design method includes the following steps:

[0076] S1) Calculate the insertion installation angle ψ according to the basic parameters of the reverse taper spline spur gear 1 and the gear shaper cutter 2, such as Figure 1-3 As shown, it is known that:

[0077] Involute function of spur gear with reverse taper spline: invα f =tanα f -α f

[0078] Inverted taper spline spur gear pitch circle diameter: d f =Zm

[0079] Inverted taper spline spur gear base circle diameter: d b ...

Embodiment 3

[0127] Example 3 proves the correctness of designing gear shaper cutters with V-V plane equivalent parameters

[0128] Then, the V-V plane tooth profile calculated by the parameters of the large end face of the inverted taper spline spur gear is compared with the tooth profile calculated by the equivalent parameters of the V-V plane to see if they coincide, that is to prove whether the gear shaper cutter is designed with the equivalent parameters of the V-V plane. Coordinate calculation formula to prove:

[0129] ①Calculation of V-V plane tooth profile by using the large end face parameters of reverse taper spline spur gear

[0130] Calculate the coordinates of the V-V plane tooth profile in space according to the parameters of the large end face of the spur gear with inverted taper spline, as shown in Image 6 shown, where:

[0131] d a = d e +[2B-(d e -di )tanψ]sinψcosψ

[0132] (Number of points: N=1, 2, 3...n)

[0133] d n = d a -NΔd

[0134] Y n =(d n -d i ...

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Abstract

The invention discloses a slotting cutter of an inverse-tapered spline straight gear and a designing method of the slotting cutter. Basic parameters of the slotting cutter comprise a tooth number Zo, a front angle gamma, a tooth crest rear angle alpha e, a reference circle diameter dfo and a reference circle pressure angle alpha fo, wherein the reference circle diameter dfo is equal to Zom, and m represents the modulus of the inverse-tapered spline straight gear; and the reference circle pressure angle alpha fo meets the formula. According to the slotting cutter of the inverse-tapered spline straight gear, an adopted inclined surface, namely a V-V plane, of a larger end of the inverse-tapered spline straight gear is designed according to the principle of meshing the bevel gear and the slotting cutter, the slotting cutter has higher tooth crest intensity, the problem of low separation and processing efficiency of double gears in the prior art is thoroughly solved, and the geometric accuracy of an inserted tooth profile of the inverse-tapered spline straight gear is guaranteed. The invention further provides the designing method of the inverse-tapered spline straight gear. With the adoption of the designing method, the high-accuracy and high-strength slotting cutter of the inverse-tapered spline straight gear can be obtained, and the accuracy of the inserted tooth profile of the inverse-tapered spline straight gear is improved.

Description

technical field [0001] The invention relates to a cutting tool, in particular to a gear shaping cutter for machining reverse taper spline spur gears and a design method thereof. Background technique [0002] Inverted bevel spline spur gears are generally used in the dual gears of the transmission (or gear shift) of motor vehicles. The main gear meshes with the inner spline of another coaxial (or concentric) gear when it rotates. It It has a good guiding effect in meshing rotation, so it is widely used in mechanical rotation. Its structure is as follows: figure 1 shown. In the past, to obtain high-precision (7-stage gear) inverted taper spline spur gear tooth profile, the double-connected gear was used for separate processing (processes include gear hobbing, gear grinding, drilling, turning, grinding, and assembly) , Although the precision of the tooth profile is guaranteed in this way, it is labor-intensive and time-consuming. [0003] In view of the above problems, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F21/06
Inventor 刘胜军丁卫东蒋宁冉启勇
Owner 重庆工具厂有限责任公司
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