CN206253694U - A kind of semicircle Step drill - Google Patents
A kind of semicircle Step drill Download PDFInfo
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- CN206253694U CN206253694U CN201621331179.XU CN201621331179U CN206253694U CN 206253694 U CN206253694 U CN 206253694U CN 201621331179 U CN201621331179 U CN 201621331179U CN 206253694 U CN206253694 U CN 206253694U
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- processing bar
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Abstract
The utility model discloses a kind of semicircle Step drill, include the drillstock and drilling rod for being integrally formed connection, drilling rod includes the first processing bar and the second processing bar of the equal semicircular in shape of radial section, the other end of the first processing bar is provided with the cutting structure for drilling, first processing bar has the first plane, and the second processing bar has the second plane；The lower end of the first processing bar is provided centrally with air flue, the air flue is upwardly extended and is through to the end face of drillstock, the ribs of the equal semicircular in shape of radial section is integrally protruded out in first plane and the second plane, diameter of the diameter of ribs less than the first processing bar, flock silk sucking opening is provided with the lower surface of ribs and arc surface, flock silk sucking opening connection air flue.By being provided with ribs so that the structural strength of drill bit more preferably, and is equipped with air flue and flock silk sucking opening so that chip can be discharged quickly in time, beneficial to the quality for improving hole wall, while heat can also be discharged in time, beneficial to the service life of extension drill bit.
Description
Technical field
The utility model is related to field of drill technology, refers in particular to a kind of semicircle Step drill.
Background technology
Now, by drill bit on non-ferrous metal during drilling through hole, generally using common fluted drill or step drill class
Drill bit is processed, and such drill bit has production efficiency higher, the advantages of lasting a long time.But, it is processed using fluted drill
When, due to the design structure with helicla flute, when thering is chip to be discharged along helicla flute in processing time slot, it may appear that chip and hole wall
Friction, causes the phenomenon of hole wall scratch；And processed with step drill, it is so more general equivalent to hole is divided into drilling and reaming processing
Logical fluted drill processing, the hole wall surface roughness is higher outer, and hole wall quality to very high request or helpless.Simultaneously
Back chipping treatment, i.e., this back chipping when having certain back chipping depth at step, but can so cause cutter to drill must be done at step
Chip can be hidden or be stained with groove, so as to when cutter rotates, chip can cause to scratch with hole wall friction, influence the surface of hole wall thick
Rugosity and quality.
Although having occurred in that woodruff drill at present, but this woodruff drill still can not in time exclude chip, still
The surface roughness and quality of hole wall can be influenceed, and this woodruff drill can also have that structural strength is not enough.Therefore,
It is necessary to be improved current woodruff drill.
The content of the invention
In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of half round platform to the utility model
Rank drill bit, it can effectively solve existing woodruff drill still can influence the surface roughness and quality and structural strength of hole wall
Not enough problem.
To achieve the above object, the utility model is using following technical scheme：
A kind of semicircle Step drill, includes the drillstock and drilling rod for being integrally formed connection, and it is equal that drilling rod includes radial section
The first of semicircular in shape processes bar and the second processing bar, and the diameter of the first processing bar processes the diameter of bar less than second, and first adds
Work bar is coaxially disposed with the second processing bar, and the second processing bar is integrally formed and is connected between one end of drillstock and the first processing bar,
The other end of the first processing bar is provided with the cutting structure for drilling, and the first processing bar has the first plane, the second processing bar
With the second plane, the second plane is concordant with the first plane；It is characterized in that：The lower end of the first processing bar is provided centrally with gas
Road, the air flue is upwardly extended and is through to the end face of drillstock, has integrally been protruded out in first plane and the second plane and radially cut
The ribs of the equal semicircular in shape in face, the diameter of the diameter less than the first processing bar of ribs, the lower surface of ribs and arc surface
On be provided with flock silk sucking opening, the flock silk sucking opening connection air flue.
Preferably, the lower surface of the ribs is inclined plane.
Preferably, the junction between the first processing bar and the second processing bar is provided with the transition that hole wall is cut for squeezing
Step.
The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology
Scheme understands：
By being provided with ribs so that the structural strength of drill bit more preferably, and is equipped with air flue and flock silk sucking opening so that
Chip can be discharged quickly in time, beneficial to the quality for improving hole wall, while heat can also be discharged in time, beneficial to making for extension drill bit
Use the life-span.
More clearly to illustrate architectural feature of the present utility model and effect, come right with specific embodiment below in conjunction with the accompanying drawings
The utility model is described in detail.
Brief description of the drawings
Fig. 1 is the front perspective view of the preferred embodiment of the utility model；
Fig. 2 is the side perspective view of the preferred embodiment of the utility model.
Accompanying drawing identifier declaration：
10th, drillstock 20, drilling rod
21st, the first processing processing bar of bar 22, second
23rd, cutting structure 24, transition shoulder
25th, ribs 201, the first plane
202nd, the second plane 203, air flue
204th, flock silk sucking opening
Specific embodiment
Refer to shown in Fig. 1 and Fig. 2, that show the concrete structure of the preferred embodiment of the utility model, include
It is integrally formed the drillstock 10 and drilling rod 20 of connection.
The drillstock 10 and drilling rod 20 are compounded to form by internal layer and outer layer, and its internal layer is high-speed steel material, and its outer layer is vanadium
Titanium hard alloy material, overall structure is sharper and firm.
The drilling rod 20 includes the first processing processing bar 22 of bar 21 and second of the equal semicircular in shape of radial section, the first processing
Less than the diameter of the second processing bar 22, first processes bar 21 is coaxially disposed the diameter of bar 21 with the second processing bar 22, the second processing
Bar 22 is integrally formed and is connected between one end of the processing bar 21 of drillstock 10 and first, and the other end of the first processing bar 21 is provided with use
In the cutting structure 23 of drilling, the first processing bar 21 has the first plane 201, and the second processing bar 22 has the second plane 202, the
Two planes 202 are concordant with the first plane 201.In the present embodiment, between the first processing bar 21 and second processing bar 22
Junction is provided with the transition shoulder 24 that hole wall is cut for squeezing.
And, the lower end of the first processing bar 21 is provided centrally with air flue 203, and the air flue 203 is upwardly extended and is through to
The end face of drillstock 10, integrally protrudes out the reinforcement of the equal semicircular in shape of radial section in the plane 202 of the first plane 201 and second
Rib 25, the diameter of the diameter less than the first processing bar 21 of ribs 25, is provided with the lower surface of ribs 25 and arc surface
Flock silk sucking opening 204, the flock silk sucking opening 204 connection air flue 203.Also, the lower surface of the ribs 25 is inclined plane.
When using, while drillstock 10 is connected with outside installation, air flue 203 is connected with outside air exhauster, in the mistake of drilling
Cheng Zhong, the borings of generation in the presence of negative pressure, by flock silk sucking opening 204 into air flue 203 and discharging, and in drilling
When the heat that produces can also be siphoned away in time, fast quickly cooling is played to the first processing bar 21, second processing bar 22 and cutting structure 23
But effect, be easy to extend drill bit service life and lifting to the drilling quality of product.
Know-why of the present utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality
With new principle, and can not by any way be construed to the limitation to the utility model protection domain.Based on explanation herein,
Those skilled in the art associates other specific embodiments of the present utility model by would not require any inventive effort,
These modes are fallen within protection domain of the present utility model.
Claims (3)
1. a kind of semicircle Step drill, includes the drillstock and drilling rod for being integrally formed connection, and drilling rod includes radial section and is in
Semicircular first processing bar and the second processing bar, the diameter of the diameter less than the second processing bar of the first processing bar, the first processing
Bar is coaxially disposed with the second processing bar, and the second processing bar is integrally formed and is connected between one end of drillstock and the first processing bar, the
The other end of one processing bar is provided with the cutting structure for drilling, and the first processing bar has the first plane, the second processing bar tool
There is the second plane, the second plane is concordant with the first plane；It is characterized in that：The lower end of the first processing bar is provided centrally with gas
Road, the air flue is upwardly extended and is through to the end face of drillstock, has integrally been protruded out in first plane and the second plane and radially cut
The ribs of the equal semicircular in shape in face, the diameter of the diameter less than the first processing bar of ribs, the lower surface of ribs and arc surface
On be provided with flock silk sucking opening, the flock silk sucking opening connection air flue.
2. a kind of semicircle Step drill as claimed in claim 1, it is characterised in that：The lower surface of the ribs is inclination
Face.
3. a kind of semicircle Step drill as claimed in claim 1, it is characterised in that：The first processing bar and the second processing bar
Between junction to be provided with and cut the transition shoulder of hole wall for squeezing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621331179.XU CN206253694U (en) | 2016-12-07 | 2016-12-07 | A kind of semicircle Step drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621331179.XU CN206253694U (en) | 2016-12-07 | 2016-12-07 | A kind of semicircle Step drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206253694U true CN206253694U (en) | 2017-06-16 |
Family
ID=59029596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621331179.XU Active CN206253694U (en) | 2016-12-07 | 2016-12-07 | A kind of semicircle Step drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206253694U (en) |
-
2016
- 2016-12-07 CN CN201621331179.XU patent/CN206253694U/en active Active
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| GR01 | Patent grant |