CN201380309Y - Forming centering drill - Google Patents
Forming centering drill Download PDFInfo
- Publication number
- CN201380309Y CN201380309Y CN200920069702U CN200920069702U CN201380309Y CN 201380309 Y CN201380309 Y CN 201380309Y CN 200920069702 U CN200920069702 U CN 200920069702U CN 200920069702 U CN200920069702 U CN 200920069702U CN 201380309 Y CN201380309 Y CN 201380309Y
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- drill
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- cutting edge
- edge
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Abstract
The utility model provides a forming centering drill which comprises a cylinder and a drill head. Two spiral chip grooves are arranged on the drill head, a drill tip is arranged at the end part of the drill head, the drill tip is provided with an edge opening, and the edge opening is located at the intersecting position of a front edge face and a rear edge face; the rear edge face comprises a conical face and a curved face, the edge opening is composed of a main cutting edge and a chamfer cutting edge, the main cutting edge is formed by the conical face and the front edge face, and the chamfer cutting edge is formed by the curved face and the front edge face. The beneficial effects of the forming centering drill are as follows: 1. when a vehicle processes an inner race inner circle of a precision bearing, the forming centering drill can lead a positioning hole and an inner rounding chamfer to be processed and formed in one time, so as to reduce processing steps, lower the error ratio, and increase the processing efficiency; 2. the forming centering drill has the characteristics of reasonable design, simple structure and high practicability.
Description
Technical field
A kind of drill bit that the utility model relates to, particularly be a kind of moulding pilot drill that is used for the processing precise bearing inner race.
Background technology
In industrial production modern today, people are more and more higher to the precision requirement of industrial production machine and associated components thereof, for example in aerospace industry, people have quite strict requirement for specification, the size of any one parts of spacecraft, if little deviation more a little might last result will be irremediable.And the bearing of use is all arranged for basic each part precision instrument, because its quantity of using in machine is big, people are to its also especially height of precision requirement.
At present, Vehicle Processing about circle in precision bearing (external diameter is below the 30 millimeters) inner ring, generally comprise and beat locating hole, boring, these three steps of interior chamfering moulding, its shortcoming is, procedure of processing is more numerous and diverse, working (machining) efficiency is lower, and the precision bearing yield rate that processes is low, does not meet the demand of production.
The utility model content
In order to overcome above-mentioned shortcoming, the utility model provide a kind of can be to the locating hole of precision bearing inner ring and the moulding pilot drill of the disposable machine-shaping of interior chamfering.
To achieve these goals, the utility model is to realize by the following technical solutions:
The moulding pilot drill, comprise cylinder and drill bit, drill bit is provided with two spiral chip areas, there is apex point the end of drill bit, apex point has a cutting edge, this cutting edge is positioned at the intersection of a lip surface and rear edge face, it is characterized in that: described rear edge bread contains a conical surface and a curved surface, and described cutting edge is made up of the described conical surface and the formed main cutting edge of lip surface and described curved surface and the formed chamfering cutting edge of lip surface.
Further, in the utility model, described cylindrical two is provided with drill bit.
The beneficial effects of the utility model:
1. the utility model can reduce procedure of processing to the locating hole and the disposable machine-shaping of interior chamfering of precision bearing inner ring, reduces error rate, has improved working (machining) efficiency.
2. the utility model is reasonable in design, and is simple in structure, practical.
Description of drawings
Fig. 1 is the front view of the utility model moulding pilot drill.
Schematic diagram when Fig. 2 is the utility model moulding pilot drill processing work.
Among the figure: 10, cylinder, 20, drill bit, 21, chip area, 22, apex point, 221, lip surface, 222, the rear edge face, 2221, the conical surface, 2222, curved surface, 223, cutting edge, 2231, main cutting edge, 2232, the chamfering cutting edge, 30, the precision bearing inner ring.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the utility model.
With reference to figure 1, a kind of moulding pilot drill comprises cylinder 10 and the drill bit 20 that is arranged on the cylinder two ends, is symmetrily processed with two spirality chip areas 21 on the drill bit 20, and the smear metal that produces in the time of can making boring is discharged from chip area.There is apex point 22 end of drill bit, and this apex point 22 comprises that lip surface 221, rear edge face 222 and lip surface 221 and rear edge face 222 intersect the cutting edge 223 that forms.
Adopt the moulding pilot drill of this structure to have reduced procedure of processing, reduce error rate, improved working (machining) efficiency the locating hole and the interior chamfering disposal molding of precision bearing inner ring.
During work, the utility model is placed on the machine tool and uses, and circle in the inner ring of precision bearing is processed.Be that circle is an example in the inner ring of 693zz bearing with the model: earlier the utility model moulding pilot drill is fixed on the lathe, 693zz bearing inner race 30 is fixed on the anchor clamps, adjust the height of moulding pilot drill subsequently, start the machine, 693zz bearing inner race 30 is at the uniform velocity rotated.Simultaneously the moulding pilot drill is relied on 693zz bearing inner race 30 (as shown in Figure 2), the cutting edge on the moulding pilot drill carries out turning to 693zz bearing inner race 30, with the locating hole and the disposable polishing moulding of interior chamfering of 693zz bearing inner race.
Then bearing inner race is holed circle moulding in the bearing inner race.To the machine-shaping of bearing inner race cylindrical, just finished the processing of bearing inner race at last.These two steps all are conventional, so here do not describe in detail.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1, moulding pilot drill, comprise cylinder and drill bit, drill bit is provided with two spiral chip areas, there is apex point the end of drill bit, apex point has a cutting edge, this cutting edge is positioned at the intersection of lip surface and rear edge face, it is characterized in that: described rear edge bread contains a conical surface and a curved surface, and described cutting edge is made up of the described conical surface and the formed main cutting edge of lip surface and described curved surface and the formed chamfering cutting edge of lip surface.
2, moulding pilot drill according to claim 1 is characterized in that: described cylindrical two is provided with drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920069702U CN201380309Y (en) | 2009-03-31 | 2009-03-31 | Forming centering drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920069702U CN201380309Y (en) | 2009-03-31 | 2009-03-31 | Forming centering drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201380309Y true CN201380309Y (en) | 2010-01-13 |
Family
ID=41523785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920069702U Expired - Lifetime CN201380309Y (en) | 2009-03-31 | 2009-03-31 | Forming centering drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201380309Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581352A (en) * | 2012-03-21 | 2012-07-18 | 锑玛(苏州)精密工具有限公司 | Chamfering drill |
-
2009
- 2009-03-31 CN CN200920069702U patent/CN201380309Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581352A (en) * | 2012-03-21 | 2012-07-18 | 锑玛(苏州)精密工具有限公司 | Chamfering drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100113 |
|
| CX01 | Expiry of patent term |