CN202804385U - Gear hob - Google Patents
Gear hob Download PDFInfo
- Publication number
- CN202804385U CN202804385U CN 201220493564 CN201220493564U CN202804385U CN 202804385 U CN202804385 U CN 202804385U CN 201220493564 CN201220493564 CN 201220493564 CN 201220493564 U CN201220493564 U CN 201220493564U CN 202804385 U CN202804385 U CN 202804385U
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- CN
- China
- Prior art keywords
- concave surface
- tooth
- worm
- hob
- cutter tooth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a gear hob which comprises a basic worm. A plurality of scraps containing grooves are placed on outer circumference of the basic worm along a self axial direction. Worm threads on the basic worm are divided into a plurality of small hob teeth by the plurality of scraps. A front hob surface, a tooth top surface and two side surfaces of the hob teeth are formed after being spaded a back. The front hob surface of the hob teeth is a concave surface. An intersecting line of the concave surface and the tooth top surface is formed into a tooth top blade. An intersecting line of the concave surface and the two side surfaces is formed into two tooth side blades. The concave surface can obviously improve sharpness degree of the tooth top blade and the tooth side blades, and therefore deformation pressure and deformation temperature on cutting positions of work pieces which are processed are reduced and scrap accumulating lumps are avoided.
Description
Technical field
The utility model relates to a kind of machine tool, particularly a kind of gear hob for machining gears.
Background technology
The process of gear hob machining gears is equivalent to the process that a pair of helical tooth wheel set meshes, and hobboing cutter is actually a helical gear that helical angle is very large, is worm.Gear hob is because its working (machining) efficiency is high, tooth pitch machining accuracy advantages of higher is widely used.
But the flank of tooth usually occurs and rill occurs, pull in existing gear hob when the workpiece such as machining gears, sprocket wheel, thereby products waste or defective work.During the work in-process carbon steel, the rill of generation makes the surface become coarse; Then mostly be when machined mild steel and pull, the rill that produces is darker.The reason that occurs this phenomenon during processing medium carbon steel is to occur built-up edge in process, and it is wrapped on the cutting edge, replaces cutting edge to cut, because its pole of figure is irregular, thereby makes finished surface produce corresponding rill.The reason that occurs this phenomenon when machined mild steel is that cutter and machined material cohere in working angles and surface of the work is torn.The factor that produces built-up edge in hobbing process is a lot, studies carefully its main cause or the sharpness of blade and reaches not that the metal fillings rock deformation pressure causes greatly.Cutter and machined material will be cohered in working angles, and then surface of the work is torn.
For above-mentioned deficiency, need to improve existing gear hob, can improve the sharpness of cutting edge and when machining gears, not be prone to the problem of built-up edge scratch workpiece.
The utility model content
In view of this, the utility model provides a kind of gear hob, and this gear hob has carried out necessary improvement to cutter tooth, makes its cutting edge sharper, and by the arc design of cutter tooth rake face having been reduced the rock deformation pressure of metal fillings, has avoided the generation of built-up edge.
The utility model addresses the above problem by following means:
Gear hob of the present utility model, comprise basic worm, axially offer many chip pockets along self on the outer circumference surface of basic worm, described many chip pockets are divided into a plurality of little cutters tooth with the worm thread on the basic worm, described cutter tooth forms rake face, crest top land and two flanks of cutter tooth behind back-off, the rake face of described cutter tooth is arranged to concave surface, and the intersection of described concave surface and crest top land forms the tooth top sword, and the intersection of described concave surface and two flanks forms two flank swords.
Further, described concave surface is arc-shaped concave.
Further, described concave surface is made of the cemented carbide body that is embedded on the cutter tooth rake face.
The beneficial effects of the utility model: gear hob of the present utility model, comprise basic worm, axially offer many chip pockets along self on the outer circumference surface of basic worm, described many chip pockets are divided into a plurality of little cutters tooth with the worm thread on the basic worm, described cutter tooth forms rake face, crest top land and two flanks of cutter tooth behind back-off, the rake face of described cutter tooth is arranged to concave surface, the intersection of described concave surface and crest top land forms the tooth top sword, and the intersection of described concave surface and two flanks forms two flank swords.The rake face of cutter tooth is arranged to the sharpness that concave surface can significantly improve tooth top sword and flank sword, thereby has reduced rock deformation pressure and the deformation temperature of workpiece to be machined cutting place, avoid the generation of built-up edge.
In addition, described concave surface is arranged to arc-shaped concave, can further reduces rock deformation pressure and the deformation temperature of metal fillings, avoid the generation of built-up edge, also prolonged thus the service life of cutting edge.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is the perspective view of gear hob;
Fig. 2 is the side view of gear hob;
Fig. 3 is cutter tooth A-A generalized section among Fig. 2;
Fig. 4 is cutter tooth B-B generalized section among Fig. 3;
Fig. 5 is the structural representation that is inlaid with cemented carbide body among Fig. 3 on the cutter tooth rake face.
The specific embodiment
Below with reference to accompanying drawing the utility model is elaborated, as shown in Figures 1 to 4: the gear hob of present embodiment, comprise basic worm 1, axially offer many chip pockets 2 along self on the outer circumference surface of basic worm 1, described many chip pockets 2 are divided into a plurality of little cutters tooth 3 with the worm thread on the basic worm 1, described cutter tooth 3 forms the rake face of cutter tooth 3 behind back-off, crest top land 4 and two flanks 5, it is characterized in that: the rake face of described cutter tooth 3 is arranged to concave surface 6, described concave surface 6 forms tooth top sword 7 with the intersection of crest top land 4, and the intersection of described concave surface 6 and two flanks 5 forms two flank swords 8,9.The rake face of cutter tooth is arranged to the sharpness that concave surface can significantly improve tooth top sword and flank sword, thereby has reduced rock deformation pressure and the deformation temperature of workpiece to be machined cutting place, avoided the generation of built-up edge.
As further improvement in the technical proposal, described concave surface 6 is arc-shaped concave.Described concave surface 6 is arranged to arc-shaped concave, can further reduces rock deformation pressure and the deformation temperature of metal fillings, avoid the generation of built-up edge, also prolonged thus the service life of cutting edge.
As further improvement in the technical proposal, described concave surface 6 is made of the cemented carbide body 10 that is embedded on cutter tooth 3 rake faces.Described cemented carbide body 10 is embedded on cutter tooth 3 rake faces removably, after cemented carbide body 10 damages, and the cemented carbide body 10 that only need more renew and need not to scrap whole hobcutter, thus reduce maintenance cost.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. gear hob, comprise basic worm (1), on the outer circumference surface of basic worm (1) along self axially offering many chip pockets (2), described many chip pockets (2) are divided into a plurality of little cutters tooth (3) with the worm thread on the basic worm (1), described cutter tooth (3) forms the rake face of cutter tooth (3) behind back-off, crest top land (4) and two flanks (5), it is characterized in that: the rake face of described cutter tooth (3) is arranged to concave surface (6), described concave surface (6) forms tooth top sword (7) with the intersection of crest top land (4), and described concave surface (6) forms two flank swords (8 with the intersection of two flanks (5), 9).
2. gear hob according to claim 1, it is characterized in that: described concave surface (6) is arc-shaped concave.
3. gear hob according to claim 2 is characterized in that: described concave surface (6) is made of the cemented carbide body (10) that is embedded on cutter tooth (3) rake face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220493564 CN202804385U (en) | 2012-09-25 | 2012-09-25 | Gear hob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220493564 CN202804385U (en) | 2012-09-25 | 2012-09-25 | Gear hob |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202804385U true CN202804385U (en) | 2013-03-20 |
Family
ID=47863328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220493564 Expired - Fee Related CN202804385U (en) | 2012-09-25 | 2012-09-25 | Gear hob |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202804385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317764A (en) * | 2018-11-20 | 2019-02-12 | 成都豪能科技股份有限公司 | Multiple tooth method of processing parts and multiple tooth part cutting tool |
-
2012
- 2012-09-25 CN CN 201220493564 patent/CN202804385U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317764A (en) * | 2018-11-20 | 2019-02-12 | 成都豪能科技股份有限公司 | Multiple tooth method of processing parts and multiple tooth part cutting tool |
| CN109317764B (en) * | 2018-11-20 | 2020-05-01 | 成都豪能科技股份有限公司 | Multi-tooth part machining method and multi-tooth part cutting tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150925 |
|
| EXPY | Termination of patent right or utility model |