CN203184773U - Front gear grinding hob - Google Patents
Front gear grinding hob Download PDFInfo
- Publication number
- CN203184773U CN203184773U CN 201320122073 CN201320122073U CN203184773U CN 203184773 U CN203184773 U CN 203184773U CN 201320122073 CN201320122073 CN 201320122073 CN 201320122073 U CN201320122073 U CN 201320122073U CN 203184773 U CN203184773 U CN 203184773U
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- gear
- cutter
- grinding hob
- tooth
- cutting edge
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Abstract
The utility model discloses a front gear grinding hob. The root portion of an involute-tooth-shaped forming a knife edge of a cutter tooth extends out to form an auxiliary cutting edge, and the inclination angle between the auxiliary cutting edge and the normal tooth-shaped symmetric line of the hob is 45 degrees to 60 degrees. According to the front gear grinding hob, when a gear is processed, sharp corners on two sides of the gear top can be removed so as to improve production efficiency and product quality.
Description
Technical field
The utility model relates to a kind of mill front gear cutter.
Background technology
The gear that each lathe and Gear Factory's family expenses standard stay mill hobboing cutter (GB/T1356-78 " involute cylindrical gear basic tooth profile ") to process all can keep wedge angle at the two ends of tooth top.Gear is after grinding on the gear grinding machines is intact, and wedge angle still exists.
Leave under the situation that the gear of above-mentioned wedge angle runs up in the gearbox of lathe, the tooth top both sides produce burr along the wedge angle of teeth directional direction because of the engagement extruding.Not only influence the transmission accuracy of gear, also can produce very big noise simultaneously.
The method of removing wedge angle at present is after the gear hobbing completion, manually removes the wedge angle at gear teeth tips two ends with file or oilstone, and this kind method not only efficient is low, and the chamfering size is inhomogeneous, and is of poor quality, the cost height, and working strength of workers is big.Can't adapt to the production of gear in enormous quantities.For this reason, because of the removal problem of wedge angle, be necessary to develop new gear hob.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of pre-grinding hob, thereby the wedge angle of processing the tooth top both sides when adding work gear can be removed improve production efficiency and product quality.
The technical solution adopted in the utility model is:
A kind of pre-grinding hob, its cutter tooth involute profile molding blade extends front cutting edge for the gear teeth tips chamfered edge at root, the angle of inclination of this front cutting edge be with hobboing cutter normal tooth profile line of symmetry at 45 ~ 60 °.
As can be seen from the above technical solutions, except main cutting edge, just involute profile is carried out outside the part of moulding, also be provided with suitable front cutting edge, can be to the gear teeth tips chamfered edge, thus when the flank profil moulding, just can remove the wedge angle of tooth top both sides, and not only efficient improves greatly, and the involute gear high conformity that molds, thereby can guarantee product quality well.
Above-mentioned pre-grinding hob, the length of described front cutting edge are 0.08m ~ 0.1m, and wherein m is the modulus of workpiece.
Above-mentioned pre-grinding hob, its cutter hub are single head dextrorotation spiral of Archimedes type.
Above-mentioned pre-grinding hob, its cutter hub chip pocket is the straight trough that is parallel to the hobboing cutter axis.
Above-mentioned pre-grinding hob, its cutter hub two ends are provided with pillow block, and two pillow blocks are coaxial with the cutter hub part.
Description of drawings
Fig. 1 cuts open structural representation for the master according to a kind of chamfered edge hobboing cutter of the present utility model.
Fig. 2 is the left TV structure schematic diagram of chamfered edge hobboing cutter.
Fig. 3 is hobboing cutter normal tooth profile figure.
The specific embodiment
The workpiece objects of the gear hob of this paper is involute gear, and gear is standard component, and relational language is quoted corresponding national standard.To GB/T8062-87 " pre-grinding hob " should be arranged, be used for the preceding processing of mill that profile of tooth meets the gear of GB/T1356-88 " involute cylindrical gear basic rack tooth profile " as pre-grinding hob.
When the concerned countries standard changes, relevant revision note and correspondence standard are all arranged, those skilled in the art should have clearly cognitive to this.
As illustrated in fig. 1 and 2, the cutter hub profile of pre-grinding hob adopts single head, the spiral of Archimedes shape of dextrorotation, and structure is simple relatively, and is relatively easy when the attached cutting sword, manufactures and designs simple relatively.
The cutting teeth that is used for giving the gear teeth tips chamfered edge that goes out at the tooth root portion sharpening of cutter, as front cutting edge, here front cutting edge add the influence that should consider tool setting body intensity, thereby, under the condition that satisfies the tooth top chamfered edge, as much as possible little.
The chip pocket of cutter is the straight trough that is parallel to the hobboing cutter axis, makes things convenient for sharpening and chip removal.
Among Fig. 1, cutter hub axially offer through hole, as axis hole, with the benchmark of this endoporus as clamping and location.Vertical keyway is arranged, to transmit the cutting required torque in the hole.This hobboing cutter is applicable to the gear-hobbing machine of various models.The basic worm of this gear hob adopts straight sided axial worm, and the flank profil of this worm screw on end face is spiral of Archimedes, and the flank profil on the normal section is crest curve, and the flank profil in axial cross section is straight line.
The hobboing cutter two ends are provided with pillow block, are used for the standard that the check hobboing cutter is installed order of accuarcy, and the threaded portion of its cylindrical and hobboing cutter basic worm is with one heart strict, its end face then with the hobboing cutter axis normal.
The hobboing cutter chip pocket adopts straight trough as previously mentioned, is conducive to cutting on the one hand, and on the other hand, easy control accuracy when hobbing cutter spade milling and check can also improve the accuracy of manufacture during sharpening rake face.
Fig. 3 is the normal tooth profile figure of gear hob, is the left-right symmetry structure.Wherein the a-b section is the working portion of cutting envelope workpiece involute profile, and the b-c section is the working portion of gear teeth tips chamfered edge.
Chamfered edge partly work the general control of size guaranteeing that the intact back of workpiece grinding chamfered part is of a size of 0.08m-0.1m (wherein m is the module of workpiece).Chamfer dimesion is too little, does not have the effect of chamfered edge, and size is too big, will cause the involute length of run to influence gear meshing length inadequately.Its angle of inclination is controlled about the 45-60 degree as shown in Figure 3.If any specific (special) requirements, can regulate separately.The angle here is illustrated in figure 3 as the angle with the flank profil line of symmetry.
Before the processing, at first hobboing cutter is installed on the knife bar of gear-hobbing machine, reduces the circular runout of hobboing cutter as far as possible, make its jerk value be no more than the desired numerical value of standard.And the peak that the two ends pillow block is beated is positioned on the same direction.During gear hobbing, the gear-hobbing machine knife bar drives cutter and rotates, and gear hob is along the feed of processed Gear axis direction, and each cutter tooth of hobboing cutter is all done rotating cutting movement around the hobboing cutter axis.Because cutter tooth is arranged by spiral, this cutter tooth (a-b section) track move axially result with the corresponding rotation of tooth base, make hobboing cutter each cutter tooth in cutting zone cut out an indentation at the diverse location of a teeth groove of gear successively, along with the continuous envelope of cutting indentation, just envelope has formed the profile of tooth of the gear teeth gradually.When the depth direction cutting approached end, b-c section chamfered edge cutting edge was started working, and along with the increase of cutting depth, cutter tooth is poured out in the both sides of processed gear teeth tips gradually and designed desired corner angle in advance.When the gear hobbing operation was finished, the tooth top chamfered edge on the gear teeth also machined simultaneously, and also uniformity of the size of corner angle.
Claims (5)
1. a pre-grinding hob is characterized in that, its cutter tooth involute profile molding blade extends front cutting edge for the gear teeth tips chamfered edge at root, the angle of inclination of this front cutting edge be with hobboing cutter normal tooth profile line of symmetry at 45 ~ 60 °.
2. pre-grinding hob according to claim 1 is characterized in that, the length of described front cutting edge is 0.08m ~ 0.1m, and wherein m is the modulus of workpiece.
3. pre-grinding hob according to claim 1 and 2 is characterized in that, its cutter hub is single head dextrorotation spiral of Archimedes type.
4. pre-grinding hob according to claim 1 is characterized in that, its cutter hub chip pocket is the straight trough that is parallel to the hobboing cutter axis.
5. pre-grinding hob according to claim 1 is characterized in that, its cutter hub two ends are provided with pillow block, and two pillow blocks are coaxial with the cutter hub part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320122073 CN203184773U (en) | 2013-03-18 | 2013-03-18 | Front gear grinding hob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320122073 CN203184773U (en) | 2013-03-18 | 2013-03-18 | Front gear grinding hob |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203184773U true CN203184773U (en) | 2013-09-11 |
Family
ID=49101669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320122073 Expired - Fee Related CN203184773U (en) | 2013-03-18 | 2013-03-18 | Front gear grinding hob |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203184773U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964849A (en) * | 2017-04-24 | 2017-07-21 | 汉德车桥(株洲)齿轮有限公司 | The processing method of contour spiral bevel gear tooth top chamfered edge |
| CN108817555A (en) * | 2018-07-16 | 2018-11-16 | 重庆齿轮箱有限责任公司 | A kind of gear chamfering method |
| CN109365888A (en) * | 2018-11-06 | 2019-02-22 | 广东坚美铝型材厂（集团）有限公司 | It is a kind of for producing the hobbing machine equipment of heat-insulation aluminum section |
-
2013
- 2013-03-18 CN CN 201320122073 patent/CN203184773U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964849A (en) * | 2017-04-24 | 2017-07-21 | 汉德车桥(株洲)齿轮有限公司 | The processing method of contour spiral bevel gear tooth top chamfered edge |
| CN108817555A (en) * | 2018-07-16 | 2018-11-16 | 重庆齿轮箱有限责任公司 | A kind of gear chamfering method |
| CN109365888A (en) * | 2018-11-06 | 2019-02-22 | 广东坚美铝型材厂（集团）有限公司 | It is a kind of for producing the hobbing machine equipment of heat-insulation aluminum section |
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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: 20130911 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |