CN218946531U - Rolling milling cutter for processing bevel gear - Google Patents
Rolling milling cutter for processing bevel gear Download PDFInfo
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- CN218946531U CN218946531U CN202222673879.9U CN202222673879U CN218946531U CN 218946531 U CN218946531 U CN 218946531U CN 202222673879 U CN202222673879 U CN 202222673879U CN 218946531 U CN218946531 U CN 218946531U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model relates to a hobbing cutter for processing bevel gears, belongs to the technical field of gear processing, and solves the problems of complex operation and low processing efficiency of bevel gear processing modes in the prior art. The hobbing cutter of the present utility model comprises: a cutter body and cutter teeth; a plurality of cutter teeth are circumferentially arranged on the outer side of the cutter body; two sides of the cutter tooth are provided with two arc-shaped side edges; the arc-shaped side edge is used for hobbing one side tooth shape of one tooth of the bevel gear. The utility model realizes the two-step processing of two sides of one tooth form, has simple operation, is suitable for processing small-modulus bevel gears, and improves the processing efficiency.
Description
Technical Field
The utility model relates to the technical field of gear machining, in particular to a hobbing cutter for machining bevel gears.
Background
There are various machining methods for small modulus bevel gears, including 3 methods of profiling, generating and enveloping. Several common processing methods are: disc milling cutter or finger bevel gear milling cutter processing, fixed hob processing by a gear hobbing machine, straight bevel gear planing tool processing by a gear planer, double milling cutter processing by a gear milling machine or processing by a gear broaching machine by a gear broaching cutter, and the like
The existing processing method has the following defects:
1. bevel gear precision machined by using a disc-shaped bevel gear milling cutter and a finger-shaped bevel gear milling cutter on a milling machine is low, machining efficiency is low, and the method is not applicable when machining bevel gear precision is high. When a gear milling cutter is used for milling bevel gears, each tooth slot is milled by three cutters; the first cutter rough-mills all tooth grooves, the widths are the same, the second cutter finish-mills one surface of the large end, and the third cutter finish-mills the other surface of the large end. The root cone angle of the tooth slot is consistent with the movement direction of the cutter during processing.
2. The fixed hob is used for machining the bevel gear on the gear hobbing machine, special accessories of the machine tool are needed, the operation is complex, and the machining is inconvenient. The gear shaper is low in efficiency of machining straight bevel gears by using straight bevel gears and low in qualification rate of bevel gears. The double milling cutter disc is used for processing the bevel gear on the gear milling machine, which is suitable for medium-modulus and large-modulus straight bevel gears and is not suitable for small-modulus straight bevel gears. The diameter of the milling cutter disc is 400-600 mm, the structure is complex, the milling cutter disc is suitable for medium-and large-modulus straight bevel gears and is not suitable for small-modulus straight bevel gears.
3. Traditional small modulus deflection straight bevel gear processed on gear shaper
The small-modulus deflection straight bevel gear is processed on the gear shaper, two gear shapers are used, and the reciprocating punching and planing movement respectively processes two tooth surfaces of the gear, so that the processing efficiency is low.
For the above reasons, it is required to provide a new rolling mill for processing a small-modulus straight bevel gear to improve processing efficiency.
Disclosure of Invention
In view of the above analysis, the present utility model aims to provide a hobbing cutter for processing bevel gears, which is used for solving the problems of complex processing operation and low processing efficiency when the existing processing method is used for processing small-modulus straight bevel gears.
The aim of the utility model is mainly realized by the following technical scheme:
a hobbing cutter for processing bevel gears, comprising: a cutter body and cutter teeth; a plurality of cutter teeth are circumferentially arranged on the outer side of the cutter body; two sides of the cutter tooth are provided with two arc-shaped side edges; the arc-shaped side edge is used for hobbing one side tooth shape of one tooth of the bevel gear.
Further, the arcuate side edges include a first arcuate side edge and a second arcuate side edge; the shape of the arc-shaped side edge is the same as the shape of the side face of one tooth of the bevel gear.
Further, the first arc-shaped side edge and the second arc-shaped side edge are symmetrically arranged on two sides of the symmetry axis of the cutter tooth.
Further, the first arcuate side edge is for machining a first tooth surface of one tooth of the bevel gear.
Further, the second arcuate side edge is for machining a second tooth surface of one tooth of the bevel gear.
Further, the end part of the cutter tooth is provided with an inclined cone angle.
Further, the distance between two arc-shaped side edges of the cutter tooth is smaller than the distance between two adjacent teeth of the bevel gear.
Further, a mounting hole is formed in the center of the cutter body; the mounting hole is used for being matched with the cutter shaft for mounting.
Further, the plurality of cutter teeth are uniformly distributed on the outer circumference of the cutter body and are integrally formed with the cutter body.
Further, the cutter shaft can rotate under the drive of the gear hobbing machine; the cutter shaft is capable of driving the milling cutter to rotate.
The technical scheme of the utility model can at least realize one of the following effects:
1. the hobbing cutter for processing the bevel gear is suitable for processing the small-modulus straight bevel gear, and the processing efficiency is about 3 times of that of a gear shaper.
2. The rolling milling cutter is provided with two arc-shaped side edges, wherein the first arc-shaped side edge is used for machining a first tooth-shaped surface of a plurality of teeth on the bevel gear, the second arc-shaped side edge is used for machining a second tooth-shaped surface after the cutter is retracted, tooth-shaped machining of the bevel gear can be completed only by two steps of operation, the operation is simple, and the machining efficiency is high.
3. The milling cutter is used on a numerical control gear hobbing machine, and when the cutter is adopted to conduct the hobbing processing of the small-modulus deflection straight bevel gear, the processing efficiency can be improved, and the finish of the tooth surface of the processed bevel gear is superior to that of the gear hobbing processing.
In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic view of a structure of a hobbing cutter for processing a bevel gear according to the present utility model;
FIG. 2 is a cross-sectional view of the roll milling cutter of FIG. 1;
FIG. 3 is a diagram of a tool motion profile;
FIG. 4 is a schematic view of a cutting tool according to the present utility model;
fig. 5 is a schematic diagram of a cutting mode of the cutter according to the present utility model.
Reference numerals:
1-a cutter body; 2-cutter teeth; 3-mounting holes; 4-bevel gears; 201-a first arcuate side edge; 202-a second arcuate side edge; 401-a first tooth surface; 402-second tooth surface.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
Example 1
In one embodiment of the present utility model, a hobbing cutter for processing bevel gears is disclosed, as shown in fig. 1, comprising: a cutter body 1 and cutter teeth 2; a plurality of cutter teeth 2 are circumferentially arranged on the outer side of the cutter body 1; two sides of the cutter tooth 2 are provided with two arc-shaped side edges; the arc-shaped side edge is used for hobbing one side profile of one tooth of the bevel gear 4.
Specifically, as shown in fig. 2, the curved side edges include a first curved side edge 201 and a second curved side edge 202; the shape of the arc-shaped side edge is the same as the shape of the side face of one tooth of the bevel gear 4.
In one embodiment of the present utility model, the first arcuate side edge 201 and the second arcuate side edge 202 are symmetrically disposed on both sides of the symmetry axis of the cutter tooth 2, as shown in fig. 2.
In particular, the symmetry axis of the cutter teeth 2 is perpendicular to the rotation axis of the cutter body 1. I.e. the blade 1, moves in a circular motion about the axis of rotation of the blade 1.
In one embodiment of the present utility model, the first arcuate side edge 201 is used to machine a first tooth surface 401 of one tooth of the bevel gear 4.
In one embodiment of the present utility model, the second arcuate side edge 202 is used to machine a second toothed surface 401 of one tooth of the bevel gear 4.
In order to reduce the impact force between the cutter and the bevel gear 4 to be machined when machining the tooth form, in one embodiment of the present utility model, as shown in fig. 1, the end of the cutter tooth 2 is provided with a bevel angle. During processing, the arc-shaped side edge of the rolling milling cutter and the tooth-shaped surfaces on two sides of the bevel gear 4 can be contacted gradually until the rolling milling cutter is completely attached, and the processing smoothness is better.
In one embodiment of the present utility model, the distance between two arc-shaped side edges of the cutter tooth 2 is smaller than the distance between two adjacent teeth of the bevel gear 4.
In practice, as shown in fig. 4, when the first tooth surface 401 is machined, the symmetry axis of the cutter tooth 2 is located at one side of the symmetry axes of the two teeth, and a certain interval offset exists; as shown in fig. 5, when the second tooth surface 402 is machined, the symmetry axis of the cutter tooth 2 is located on the other side of the symmetry axes of the two teeth, with an equidistant offset.
That is, when the first curved side edge 201 machines the first tooth surface 401, the second curved side edge 202 does not contact the second tooth surface 402; as shown in fig. 4. When the second curved side edge 202 machines the second tooth surface 402, the first curved side edge 201 does not contact the first tooth surface 401, as shown in fig. 5.
In one embodiment of the present utility model, the plurality of cutter teeth 2 are uniformly distributed in the outer circumferential direction of the cutter body 1, and are integrally formed with the cutter body 1.
In one embodiment of the present utility model, as shown in fig. 1, a mounting hole 3 is provided at the center of the blade 1; the mounting hole 3 is used for being matched with a cutter shaft for mounting.
Specifically, the hobbing cutter is fixedly connected with the cutter shaft through the mounting hole 3 in a welding or interference fit manner; after the two are fixed, the cutter shaft and the hobbing cutter are connected into a whole and synchronously move. The axis of the cutter shaft is coincident with the axis of the mounting hole 3, and the axis of the cutter shaft and the axis of the mounting hole 3 are the rotation axis of the cutter body 1.
Further, the cutter shaft can rotate under the drive of the gear hobbing machine; the cutter shaft is capable of driving the milling cutter to rotate.
Further, on the design of the cutter tooth profile, the shape of the arc-shaped side edge correspondingly changes according to the change of the bevel gear tooth profile due to different processing routes.
As shown in fig. 3, the rolling cutter according to the present utility model has a cutter movement path which is not identical to the root cone angle of the tooth slot but identical to the indexing cone angle of the bevel gear. When the bevel gear is machined, the position of the rolling milling cutter can be controlled to be fixed, the rolling milling cutter only rotates around the axis of the rolling milling cutter, and the relative movement of the rolling milling cutter and the bevel gear 4 is realized through the movement of the machined bevel gear 4, so that the machining of the tooth surface of the bevel gear 4 is finished.
The implementation process comprises the following steps:
when the rolling milling cutter is used for processing a small-modulus straight-tooth deflection bevel gear on a numerical control gear hobbing machine, the operation process is as follows:
step 1: the tool is centered.
Step 2: processing: the cutter cuts one side tooth form of the gear without moving the workpiece, then the cutter is retracted, the workpiece shaft is indexed, and one side tooth form (first tooth form surface 401) of the next tooth is machined.
Step 3: after the machining of one side of all the teeth is finished, the cutter is retracted, and the cutter shaft automatically 'moves into the cutter' to machine the tooth form of the other side of the teeth of the bevel gear 4.
Step 4: indexing the workpiece shaft, and processing the next tooth by the cutter, and retracting the cutter until all the teeth are processed.
Compared with the prior art, the technical scheme provided by the embodiment has at least the following beneficial effects:
1. when the hobbing cutter is used for processing the small-modulus deflection bevel gear, compared with the traditional gear shaping machine, the processing efficiency is improved by about 3 times. The machining precision is improved by 1-2 grades compared with the traditional method of using a disc milling cutter on a milling machine, and the machining efficiency of gears is improved.
2. When the rolling milling cutter is used for processing the small-modulus deflection bevel gear on the numerical control gear hobbing machine, the rolling milling cutter is used for processing, the processing is completed in two steps, one surface of the large end of the bevel gear is milled by a first cutter, and the other surface of the large end of the bevel gear is milled by a second cutter, so that the processing of the tooth form of one bevel gear can be completed by only two cutters.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (4)
1. A hobbing cutter for processing bevel gears, comprising: a blade body (1) and a blade tooth (2); a plurality of cutter teeth (2) are circumferentially arranged on the outer side of the cutter body (1); two sides of the cutter tooth (2) are provided with two arc-shaped side edges; the arc-shaped side edge is used for hobbing one side tooth shape of one tooth of the bevel gear (4);
the arc-shaped side edges comprise a first arc-shaped side edge (201) and a second arc-shaped side edge (202); the shape of the arc-shaped side edge is the same as the shape of the side surface of one tooth of the bevel gear (4);
the first arc-shaped side edge (201) and the second arc-shaped side edge (202) are symmetrically arranged at two sides of the symmetry axis of the cutter tooth (2);
the first arc-shaped side edge (201) is used for machining a first tooth surface (401) of one tooth of the bevel gear (4); -said second arcuate side edge (202) is adapted to machine a second toothed surface (402) of a tooth of said bevel gear (4);
the end part of the cutter tooth (2) is provided with an inclined cone angle;
the distance between two arc-shaped side edges of the cutter tooth (2) is smaller than the distance between two adjacent teeth of the bevel gear (4);
when the first arc-shaped side edge (201) is used for machining the first tooth-shaped surface (401), the second arc-shaped side edge (202) is not contacted with the second tooth-shaped surface (402); when the second arc-shaped side edge (202) is used for machining the second tooth-shaped surface (402), the first arc-shaped side edge (201) is not contacted with the first tooth-shaped surface (401).
2. The hobbing cutter for processing bevel gears according to claim 1, wherein a mounting hole (3) is provided at the center of the cutter body (1); the mounting hole (3) is used for being matched with the cutter shaft.
3. The hobbing cutter for processing bevel gears according to claim 2, wherein a plurality of cutter teeth (2) are uniformly distributed in the outer circumference of the cutter body (1) and are integrally formed with the cutter body (1).
4. A hobbing cutter for processing a bevel gear according to claim 3, wherein said cutter shaft is rotatable under the drive of a gear hobbing machine; the cutter shaft is capable of driving the milling cutter to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222673879.9U CN218946531U (en) | 2022-10-11 | 2022-10-11 | Rolling milling cutter for processing bevel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222673879.9U CN218946531U (en) | 2022-10-11 | 2022-10-11 | Rolling milling cutter for processing bevel gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218946531U true CN218946531U (en) | 2023-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222673879.9U Active CN218946531U (en) | 2022-10-11 | 2022-10-11 | Rolling milling cutter for processing bevel gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218946531U (en) |
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2022
- 2022-10-11 CN CN202222673879.9U patent/CN218946531U/en active Active
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