CN115194258A - Shaving method and gear - Google Patents
Shaving method and gear Download PDFInfo
- Publication number
- CN115194258A CN115194258A CN202210349956.7A CN202210349956A CN115194258A CN 115194258 A CN115194258 A CN 115194258A CN 202210349956 A CN202210349956 A CN 202210349956A CN 115194258 A CN115194258 A CN 115194258A
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- Prior art keywords
- tooth
- shaving
- workpiece
- gear
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- 238000000034 method Methods 0.000 title abstract description 38
- 238000003672 processing method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000007790 scraping Methods 0.000 description 9
- 238000003754 machining Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
- B23D79/02—Machines or devices for scraping
- B23D79/04—Machines or devices for scraping with rotating cutting-tool, e.g. for smoothing linings of bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Gear Processing (AREA)
Abstract
The present invention aims to provide a shaving method capable of making tooth surfaces and tooth tips on both sides of a tooth of a gear asymmetric in left and right directions and satisfying wider demands of users, and a gear manufactured by the shaving method. In the shaving method of the present invention, in the shaving process in which the phases of the rotations of the workpiece (100) and the shaving tool (110) are synchronized to perform the processing, the phases of the workpiece (100) and the shaving tool (110) are changed to individually process the left and right tooth surfaces (the left tooth surface (114 a) and the right tooth surface (114 b)).
Description
Technical Field
The invention relates to a shaving (Japanese: スカイビング) processing method and a gear.
Background
As a machining method for generating a gear, a shaving method is known. The shaving processing is performed in a state in which rotation of a shaving tool as a cutting tool and rotation of a workpiece as a processing object are synchronized and a rotation axis (tool axis) of the shaving tool is inclined with respect to a rotation axis (workpiece axis) of the workpiece. This causes a difference between the rotation direction of the workpiece and the rotation direction of the scraping tool, and causes "slippage" when the scraping tool interferes with the workpiece. The interference portion is cut off from the workpiece by the slip, and a tooth groove (tooth profile) or the like is machined in the workpiece.
In shaving processing in processing a normal spur gear, teeth are cut by moving a shaving cutter in parallel in the tooth width direction of a workpiece while keeping a shaft intersection angle of a cutter shaft with respect to a workpiece shaft constant. As a method of machining a skew tooth profile (japanese patent document バイアス profile) in which the position of the tooth tip changes in the tooth width direction, for example, in the gear machining method of patent document 1 by the present applicant, teeth cutting is performed while not only moving the scraping tool in the tooth width direction of the workpiece but also moving the scraping tool in the circumferential direction.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2020-19096
Disclosure of Invention
Problems to be solved by the invention
Not limited to the gear machining method of patent document 1, in the conventional machining method, the teeth formed on the workpiece to be machined have a symmetrical shape. That is, the tooth flanks and the tooth crests on both sides of the tooth root are bilaterally symmetrical. However, for the purpose of force transmission, noise reduction, gear box switching, and the like, it is sometimes desirable that tooth surfaces and tooth tips on both sides of the teeth are left-right asymmetric gears, and there is room for further improvement in the technique of patent document 1.
In view of the above problems, an object of the present invention is to provide a shaving method capable of making tooth surfaces and tooth tips on both sides of a tooth of a gear asymmetric in the left-right direction and satisfying wider demands of users, and a gear manufactured by the shaving method.
Means for solving the problems
In order to solve the above problem, a typical configuration of the shaving method of the present invention is characterized in that, in shaving in which the rotation phases of the workpiece and the shaving tool are synchronized to perform machining, the phases of the workpiece and the shaving tool are changed to individually machine the left and right tooth surfaces.
With the above configuration, by individually processing the left and right tooth surfaces, it is possible to perform a crowning process having a left-right unevenness. Thus, a gear to which a drum trim of an arbitrary shape corresponding to the user's desire is applied can be manufactured.
In order to solve the above problem, a typical structure of the gear of the present invention is characterized in that the left and right tooth surfaces are asymmetrical with respect to the center line of the tooth root. The components corresponding to the technical idea of the shaving method and the description of the components can be applied to the gear.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the tooth surfaces and the tooth tips on both sides of the teeth of the gear can be made asymmetric to the left and right, and a shaving method that can satisfy the needs of a wider range of users and a gear manufactured by using the shaving method can be provided.
Drawings
Fig. 1 is a diagram illustrating a shaving method according to the present embodiment.
Fig. 2 is a diagram comparing the shapes of a workpiece formed by a conventional shaving method and a workpiece formed by the shaving method of the present embodiment.
Description of the reference numerals
10. A workpiece; 12. tooth profile; 14a, left tooth surface; 14b, a right tooth surface; 16. a tooth root; 18. tooth top; 20. tooth tip shape without drum dressing; 30. scraping a cutter; 100. a workpiece; 110. scraping a cutter; 112. tooth profile; 114a, left tooth surface; 114b, right flank; 116. dedendum, 118, addendum; 120. tooth tip shape without drum dressing.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Dimensions, materials, other specific numerical values, and the like shown in the embodiment are merely examples for facilitating understanding of the present invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and overlapping description thereof is omitted, and elements not directly related to the present invention are not illustrated or described. In the following description of the embodiments, the left and right sides refer to the left and right sides in the drawings.
Fig. 1 is a diagram illustrating a shaving method according to the present embodiment. In the shaving method of the present embodiment, the workpiece 100 and the shaving tool 110 are processed by synchronizing the phases of rotation. Specifically, first, as shown in fig. 1 (a), the workpiece 100 is cut by the scraping tool 110, and the tooth profile 112 is formed with respect to the workpiece 100. At this time, the center is cut with the minimum value of the allowable range of the tooth profile (lower limit value of the Over Ball Diameter: OBD) as a target.
Next, as shown in fig. 1 (b), the phase of the scraping tool 110 is changed to the left with respect to the workpiece 100. Thereby, the tooth profile 112 in which the left tooth surface 114a is deeply carved is formed on the work 100. Next, as shown in fig. 1 (c), the phase of the scraping tool 110 is changed to the right with respect to the workpiece 100. As a result, a tooth profile 112 formed by deeply cutting out the right tooth surface 114b is formed in the workpiece 100, and both the left and right sides of the tooth profile 112 form tooth tips 118.
In fig. 1 (d), the dotted line shows the addendum shape 120 in the case where the drum dressing (japanese: クラウニング) is not applied. In the shaving method of the present embodiment, the phases of the workpiece 100 and the shaving tool 110 are changed, so that the left and right tooth surfaces (the left tooth surface 114a and the right tooth surface 114 b) are individually machined. By thus separately machining the left and right tooth surfaces, it is possible to perform a crowning process having a left-right unevenness as shown in fig. 1 (d). Thus, a gear to which a drum dressing of an arbitrary shape corresponding to the user's desire is applied can be manufactured.
Fig. 2 is a diagram comparing the shape of a workpiece formed by the conventional shaving method with the shape of a workpiece formed by the shaving method of the present embodiment. In the conventional shaving process, as shown in fig. 2 (a), the left tooth surface 14a and the right tooth surface 14b are simultaneously cut with respect to the workpiece 10 by cutting the workpiece 10 with the shaving tool 30, and the left and right sides of the tooth profile 12 become tooth crests 18, whereby the gear is formed. In this case, in the conventional machining method, the cutting is performed so that the interval between the left tooth surface 14a and the right tooth surface 14b becomes the center value of the allowable range of the tooth profile (the center value of the allowable error of the OBD).
On the other hand, in the shaving method of the present embodiment, the left tooth surface 114a and the right tooth surface 114b are separately machined as described above. In order to retain the margin, the center is cut with the minimum value of the allowable range of the tooth profile (the lower limit value of the OBD) as the target, as described above. Thus, root 116 of the present invention is shallower by difference D than conventional root 16. Therefore, as shown in fig. 2 (c), it is possible to make the dedendum 116 shallower and form the tooth profile 112 of the same width as the tooth profile 12 shown in fig. 2 (b).
In this case, as shown in fig. 2 (d), in the conventional shaving method, the left and right tooth surfaces (the left tooth surface 14a and the right tooth surface 14 b) of the gear (the workpiece 10) are symmetrical with respect to the center line L of the tooth root 16. In the conventional method, the tooth root 16 is deeper as the width of the tooth surface is larger. In fig. 2 (d), the broken line shows the tooth top 20 in the case where the drum dressing is not applied.
In contrast, as shown in fig. 2 (e), in the shaving method of the present embodiment, the left and right tooth surfaces (the left tooth surface 114a and the right tooth surface 114 b) of the gear (the workpiece 100) are asymmetrical with respect to the center line L of the tooth root 116. As described above, according to the shaving method of the present embodiment, it is possible to provide a gear in which the left and right tooth surfaces have an asymmetrical shape with respect to the center line of the tooth bottom 116.
In addition, in the method of the present invention, the root 116 is shallower by the difference D (since the lower limit of OBD is targeted), and also does not become deeper with the drum dressing, enabling a uniform depth. Therefore, particularly in the case of an internal gear, the thickness of the gear can be made thin.
The preferred embodiments of the present invention have been described above with reference to the drawings, but it is needless to say that the present invention is not limited to the examples. It is obvious that those skilled in the art can conceive various modifications and alterations within the scope of the claims, and these modifications also fall within the technical scope of the present invention.
Industrial applicability
The present invention can be applied to a shaving method and a gear.
Claims (2)
1. A shaving processing method is characterized in that,
in the shaving processing for processing by synchronizing the phases of the rotation of the workpiece and the shaving tool,
the left and right tooth surfaces are individually machined by changing the phases of the workpiece and the shave tool.
2. A gear is characterized in that the gear is provided with a gear body,
the left and right flanks are asymmetrical with respect to the centerline of the tooth root.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-063406 | 2021-04-02 | ||
| JP2021063406A JP2022158473A (en) | 2021-04-02 | 2021-04-02 | Skiving processing method and gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115194258A true CN115194258A (en) | 2022-10-18 |
Family
ID=83574526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210349956.7A Pending CN115194258A (en) | 2021-04-02 | 2022-04-02 | Shaving method and gear |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2022158473A (en) |
| CN (1) | CN115194258A (en) |
-
2021
- 2021-04-02 JP JP2021063406A patent/JP2022158473A/en active Pending
-
2022
- 2022-04-02 CN CN202210349956.7A patent/CN115194258A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022158473A (en) | 2022-10-17 |
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