CN212599463U - Gear shaping cutter for processing straight bevel gear - Google Patents
Gear shaping cutter for processing straight bevel gear Download PDFInfo
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- CN212599463U CN212599463U CN202021195641.4U CN202021195641U CN212599463U CN 212599463 U CN212599463 U CN 212599463U CN 202021195641 U CN202021195641 U CN 202021195641U CN 212599463 U CN212599463 U CN 212599463U
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Abstract
The utility model discloses a straight-tooth bevel gear processing is with gear shaping sword, include the cutter body and be located the top sword at cutter body top, the top sword includes main cutting edge, first linear working face and second combined working face are connected respectively in the main cutting edge both ends, second combined working face includes arc bulge face and linear working face, linear working face passes through the arc bulge face and is connected with the main cutting edge, the utility model has the advantages of can realize digging a root and machining efficiency is high.
Description
Technical Field
The utility model relates to a straight-tooth bevel gear makes the field, especially relates to a gear shaping cutter is used in processing of straight-tooth bevel gear.
Background
The tooth root transition area of the gear tooth part of the straight bevel gear driven by the central transmission case and the accessory case of a military aircraft engine of a certain model requires conscious trimming, namely root digging, as shown in figure 1, so as to ensure that the contact trace of a finished product after final gear grinding has tooth tip disengagement.
As shown in fig. 2, in the tooth profile diagram of a conventional straight bevel gear in the prior art, the dotted line is the tooth profile of a plane tooth, the solid line is the tooth profile of a grinding tooth, and the grinding tooth is performed after the plane tooth. In order to process the straight bevel gear with the root digging part, the method adopted by the current machining field is to add a grinding procedure after finishing the gear shaping procedure and depend on the grinding processing root digging element. The defects and shortcomings of the method are mainly reflected in the following aspects:
(1) the two procedures of grinding and gear shaping are required to be clamped twice, so that the consistency of the root digging part and the matching of the root digging part and the tooth profile are difficult to ensure;
(2) the grinding processing of the disc grinding wheel is difficult to debug and ensure the root digging amount;
(3) the processing cost and the processing period of the parts are greatly increased.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide one kind and can realize digging the root and the high straight-tooth bevel gear processing of machining efficiency is with gear shaping sword.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a straight-tooth bevel gear processing is with gear shaping sword, includes the cutter body and is located the top sword at cutter body top, the top sword includes main cutting edge, first linear working face and second combined face are connected respectively in main cutting edge both ends, second combined face includes arc convex surface and linear working face, linear working face passes through the arc convex surface and is connected with main cutting edge.
As a further improvement to the above technical solution:
the width of the top blade is d, the width of the small end of the straight bevel gear is s1, the width of the large end of the straight bevel gear is s2, and s2/2 is more than d and less than s 1.
The radius of the arc-shaped convex surface is R, and the minimum value of the root fillet of the straight bevel gear is Rmin，r＜Rmin。
On a plane perpendicular to the main cutting edge, the first linear working surface and the second combined working surface, the angle between the projection line of the first linear working surface and the projection line of the main cutting edge is alpha, the angle between the projection extension line of the linear working surface and the projection line of the main cutting edge is beta, wherein the angle is more than 90 degrees and less than alpha and less than 100 degrees, and the angle is more than 100 degrees and less than beta and less than 120 degrees.
α=98°，β=110°。
The height of the arc-shaped convex surface relative to the linear working surface is m, m =0.25 +/-0.025 mm, and r =1.1 mm.
The other end of the cutter body, which is far away from the top edge, is provided with a fastening and fixing hole.
The cutter body includes fixed part and transition portion, transition portion is used for connecting fixed part and top sword, it is located the fixed part to step up the fixed orifices.
The fixing part has a basic shape which is approximately a right trapezoid in a side view, a right-angle waist of the trapezoid is arranged close to one side of the second combined working face, the other waist of the trapezoid is arranged close to one side of the first linear working face, the upper bottom of the trapezoid is arranged close to one side of the top blade, and the second combined working face and the first linear working face are arranged in a staggered mode relative to the right-angle waist and the other waist of the trapezoid respectively.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a gear shaper sword includes main cutting edge, first linear working face and second combined working face, and second combined working face includes the protruding face of arc and linear working face, can once only accomplish the processing of tooth profile (linear working face), tooth root fillet processing (the protruding face of arc), the processing of tooth bottom (main cutting edge) and dig root position (the protruding face of arc) of straight tooth awl gear. The grinding and gear shaping can be processed in place at one time without clamping twice. The machined parts have stable quality, high machining efficiency and popularization.
Drawings
Fig. 1 is a tooth profile diagram of a straight bevel gear according to the present invention.
Fig. 2 is a tooth profile diagram of a conventional straight bevel gear according to the prior art of the present invention.
Fig. 3 is a front view of the tooth shaver of the present invention.
Fig. 4 is a sectional view taken along line B-B of fig. 2.
Fig. 5 is a partially enlarged view of a portion a in fig. 3.
The reference numerals in the figures denote:
1. a cutter body; 2. a top edge; 21. a main cutting edge; 22. a first linear working surface; 23. a second combined working surface; 231. an arc convex surface; 232. a linear working surface; 3. a fixed part; 31. fastening the fixing hole; 4. a transition portion.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.
Example 1:
as shown in fig. 3 to 5, the tooth planing tool for processing the straight bevel gear of the present embodiment includes a tool body 1 and a top blade 2 located at the top of the tool body 1, the top blade 2 includes a main cutting edge 21, a first linear working surface 22 and a second combined working surface 23, the first linear working surface 22 and the second combined working surface 23 are respectively connected to two ends of the main cutting edge 21, the second combined working surface 23 includes an arc-shaped convex surface 231 and a linear working surface 232, and the linear working surface 232 is connected to the main cutting edge 21 through the arc-shaped convex surface 231.
The width of the top blade 2 is d, the width of the small end of the straight bevel gear is s1, the width of the bottom of the big end groove of the straight bevel gear is s2, wherein s2/2 < d < s 1. In the embodiment, the root digging amount is only 0-0.15 mm, d =2.02 ± 0.2mm, s1=3.5mm, and s2=4 mm. d is less than s1 to avoid the non-working surface of the gear shaper cutter from touching the other tooth surface, and s2/2 is less than d to avoid the rib left in the middle of the tooth bottom.
The radius of the arc-shaped convex surface 231 is R, and the minimum value of the root fillet of the straight bevel gear is Rmin，r＜Rmin。
On a plane perpendicular to the main cutting edge 21, the first linear working surface 22 and the second combined working surface 23, the angle of the projection line of the first linear working surface 22 and the projection line of the main cutting edge 21 is alpha, the angle of the projection extension line of the linear working surface 232 and the projection line of the main cutting edge 21 is beta, wherein the angle of alpha is more than 90 degrees and less than 100 degrees, and beta is more than 100 degrees and less than 120 degrees.
In the present embodiment, α =98 °, β =110 °. The convex height of the arc convex surface 231 relative to the linear working surface 232 is m, m =0.25 ± 0.025mm, R =1.1mm, Rmin=1.6mm。
The other end of the cutter body 1 far away from the top blade 2 is provided with a fastening and fixing hole 31.
The cutter body 1 comprises a fixing part 3 and a transition part 4, wherein the transition part 4 is used for connecting the fixing part 3 and the top blade 2, and a clamping fixing hole 31 is positioned on the fixing part 3.
The fixing portion 3 is substantially in the basic shape of a right trapezoid in a side view, a right-angled waist of the trapezoid is disposed near the second combined working surface 23, the other waist of the trapezoid is disposed near the first linear working surface 22, an upper bottom of the trapezoid is disposed near the top blade 2, and the second combined working surface 23 and the first linear working surface 22 are disposed in a staggered manner with respect to the right-angled waist and the other waist of the trapezoid, respectively.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a straight bevel gear processing is with gear shaping sword, includes cutter body (1) and top sword (2) that are located cutter body (1) top, top sword (2) are including main cutting edge (21), first linear working face (22) and second combined working face (23) are connected respectively in main cutting edge (21) both ends, its characterized in that: the second combined working surface (23) comprises an arc-shaped convex surface (231) and a linear working surface (232), and the linear working surface (232) is connected with the main cutting edge (21) through the arc-shaped convex surface (231).
2. The tooth planing tool of claim 1 wherein: the width of the top blade (2) is d, the width of the small end of the straight bevel gear is s1, the width of the bottom of the large end groove of the straight bevel gear is s2, and s1 is more than d and less than s 2/2.
3. The tooth planing tool of claim 2 wherein: the radius of the arc-shaped convex surface (231) is R, and the minimum value of the root fillet of the straight bevel gear is Rmin，r＜Rmin。
4. The tooth planing tool of claim 3 wherein: on a plane perpendicular to the main cutting edge (21), the first linear working surface (22) and the second combined working surface (23), the angle between the projection line of the first linear working surface (22) and the projection line of the main cutting edge (21) is alpha, the angle between the projection extension line of the linear working surface (232) and the projection line of the main cutting edge (21) is beta, wherein the angle is more than 90 degrees and less than alpha and less than 100 degrees, and more than 100 degrees and less than beta and less than 120 degrees.
5. The tooth planing tool of claim 4 wherein: α =98 °, β =110 °.
6. The tooth planing tool of claim 4 wherein: the height of the arc-shaped convex surface (231) relative to the linear working surface (232) is m, m =0.25 +/-0.025 mm, and r =1.1 mm.
7. The tooth planing tool according to any of claims 1 to 6, wherein: the other end of the cutter body (1) far away from the top blade (2) is provided with a fastening fixing hole (31).
8. The tooth planing tool of claim 7 wherein: the cutter body (1) comprises a fixing part (3) and a transition part (4), the transition part (4) is used for connecting the fixing part (3) and the top blade (2), and the clamping fixing hole (31) is located on the fixing part (3).
9. The tooth planing tool of claim 8 wherein: the fixing part (3) is approximately in a right trapezoid basic shape in side view, the right-angle waist of the trapezoid is arranged close to one side of the second combined working surface (23), the other waist of the trapezoid is arranged close to one side of the first linear working surface (22), the upper bottom of the trapezoid is arranged close to one side of the top blade (2), and the second combined working surface (23) and the first linear working surface (22) are arranged in a staggered mode relative to the right-angle waist and the other waist of the trapezoid respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021195641.4U CN212599463U (en) | 2020-06-24 | 2020-06-24 | Gear shaping cutter for processing straight bevel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021195641.4U CN212599463U (en) | 2020-06-24 | 2020-06-24 | Gear shaping cutter for processing straight bevel gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212599463U true CN212599463U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021195641.4U Active CN212599463U (en) | 2020-06-24 | 2020-06-24 | Gear shaping cutter for processing straight bevel gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212599463U (en) |
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2020
- 2020-06-24 CN CN202021195641.4U patent/CN212599463U/en active Active
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