CN207255315U - Bulb counterbit - Google Patents
Bulb counterbit Download PDFInfo
- Publication number
- CN207255315U CN207255315U CN201721370497.1U CN201721370497U CN207255315U CN 207255315 U CN207255315 U CN 207255315U CN 201721370497 U CN201721370497 U CN 201721370497U CN 207255315 U CN207255315 U CN 207255315U
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- cutter head
- axis
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- cutter
- cutter hub
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- 238000005520 cutting process Methods 0.000 claims abstract description 40
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 82
- 210000002421 cell wall Anatomy 0.000 claims description 9
- 230000004323 axial length Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 31
- 238000000034 method Methods 0.000 abstract description 18
- 238000013461 design Methods 0.000 abstract description 4
- 238000000227 grinding Methods 0.000 description 11
- 238000003801 milling Methods 0.000 description 6
- 238000007514 turning Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses bulb counterbit, including drill bit, the cutting edge of the drill bit is arc, mounting portion of its center of circle close to drill bit, and on the axis of drill bit, and during bit bore, cutting edge around drill bit axis rotational energy by the bottom hole drilling in the hole being drilled into hemisphere face.In use, first being drilled with conventional bit, when having a shave, using the bulb counterbit designed by the utility model, have a shave to bottom hole, so that it is configured to arc.Have a shave by using the bulb counterbit gone out designed by the utility model to carry out arc to the bottom hole of some special holes, it is opposite with for traditional process tool, shorten the time needed for processing arcuate socket bottom, processing efficiency is improved, and the arcuate socket bottom obtained by bulb counterbit and the concentricity in hole are high.And under the structures such as the straight slot of design, complete the mode that connecting portion is very easily ground using common plane, precision is very easy to ensure, processing cost is extremely low.
Description
Technical field
It the utility model is related to a kind of counterbit, and in particular to bulb counterbit.
Background technology
Drill bit be on solid material drilling go out through hole or blind hole, and can be to the cutter of existing hole reaming.It is common
Drill bit mainly have fluted drill, chit drill, centre drill, depth drill and cylindrical drill.Though reamer and counterbit cannot be on solid materials
Directly drill, but they are also traditionally included into drill bit one kind.
Counterbit, that is, combined countersink drill, also someone be referred to as：Combined countersink drill, rose reamer, with special on lathe, drilling machine or other lathes
Cutter, scrapes hole machined on workpiece planar end surface or cuts out cone.Counterbit is that the end face of device to hole carries out plane, cylinder, the conical surface add
Work.It is machined go out hole on the cylindrical counter sink of processing, taper counter sink and during the boss of end face, all using counterbit.
When the bottom hole progress arc to some special holes is had a shave to obtain required arcuate socket bottom, due to existing counterbit
It is only capable of processing the bottom hole of taper surface, so when needing arcuate socket bottom at present, is only capable of adding bottom hole by grinding or turning
Work camber, this is for the assembling or use that need arcuate socket bottom, and the time cost at processing arcuate socket bottom is big and arc
Bottom hole and the concentricity in hole are poor.Meanwhile for the product having, it is architectural limitation, grinding or car can not be just used at all
Cut to process bottom hole arc.
Utility model content
The utility model aim is to provide bulb counterbit, when solving to need arcuate socket bottom at present, be only capable of by grinding or
Bottom hole is processed camber by person's turning, this processes arcuate socket bottom for the assembling or use that need arcuate socket bottom
The problem of time cost is greatly and the concentricity in arcuate socket bottom and hole is poor, while the product for solving to have is architectural limitation, at all with regard to nothing
The problem of method is using being ground or turning is to process bottom hole arc.
Therefore its cutting edge is designed as arc, can process arc by the utility model on the basis of drill bit
Bottom hole, become a kind of counterbit that can process arcuate socket bottom.
The utility model is achieved through the following technical solutions：
Bulb counterbit, including drill bit, the cutting edge of the drill bit are arc, its center of circle is close to the mounting portion of drill bit, and position
In on the axis of drill bit, and during bit bore, cutting edge around drill bit axis rotational energy by the bottom hole drilling in the hole being drilled
Into half concave spherical surface or bad concave spherical surface.
In use, first drilled with conventional bit, it is right using the bulb counterbit designed by the utility model when having a shave
Bottom hole is had a shave, so that it is configured to arc.
It is most long around the axis rotary drilling-head of the drill bit, orthographic projection of the cutting edge in the plane parallel to drill axis
When, when cutting edge orthographic projection at this time is minor arc, its bottom hole processed is bad concave spherical surface, when its orthographic projection is semicircle or excellent
During arc, its bottom hole processed is half concave spherical surface.Bad concave spherical surface is concave shaped ball when curve sideline is minor arc in longitudinal section
Face；Half concave spherical surface is concave shaped sphere when curve sideline is semi arch in longitudinal section.
Have a shave by using the bulb counterbit gone out designed by the utility model to carry out arc to the bottom hole of some special holes,
The opposite time with for traditional process tool, shortening needed for processing arcuate socket bottom, improves processing efficiency, and pass through ball
The arcuate socket bottom and the concentricity in hole that head counterbit obtains are high.
Further, around the axis rotary drilling-head of the drill bit, cutting edge is in the plane parallel to drill axis
When orthographic projection is most long, cutting edge orthographic projection at this time is semicircle or major arc.
Using the bulb counterbit designed by the utility model, have a shave to bottom hole so that it is configured to arc, preferably into
Shape is hemisphere face.
Further, the drill bit includes the cutter hub and cutter head being detachably connected with each other, and the cutting edge is located on cutter head
One end away from cutter hub, mounting hole, the axis and knife of the mounting hole are provided with the cutter hub on the end face of cutter head
The axis of body overlaps, and one end of cutter hub is provided with installation axle on the cutter head, in the installation axle insertion mounting hole with
Cutter hub is set to be clamped with cutter head.
Clamping can be realized by mounting hole and installation axle interference fit, or set related card slot and protrusion and be interference fitted
Realize, can also be realized by modes such as thread fittings.
Long-term drilling is had a shave in operation, and cutting edge is the position that most serious is worn on drill bit.When the cutting edge of drill bit is ground
, it is necessary to more bit change during damage.The mode high expensive of this more bit change entirety, therefore drill bit is split as cutter head and cutter hub,
Cutter head is connected on cutter hub by the interference fit of installation axle and mounting hole at the same time, with when cutting edge is worn, it is only necessary to replace
Cutter head, reduces drilling and has a shave cost.
Further, the hole wall on the mounting hole close to dregs guiding groove is connected with dregs guiding groove, and the aperture of mounting hole is small
In the outside diameter of installation axle；
Be provided with recessing groove on the side wall of the installation axle, the axis of the recessing groove parallel to installation axle axis,
And recessing groove there are two, and it is symmetrically disposed in along the axis centre of installation axle on the side wall of installation axle；
The maximum width dimensions for being smaller than mounting hole and dregs guiding groove connectivity part between recessing groove.
Since the aperture of mounting hole is less than the outside diameter of installation axle, cutter hub is matched somebody with somebody with cutter head by the interference of mounting hole and installation axle
When closing clamping connection each other, therefore being directly inserted into installation axle in mounting hole, required dynamics is very big, and is not easy to installation axle from peace
Dress exits in hole, replaces cutter head；In order to avoid the generation of the above problem, by mounting hole close to dregs guiding groove hole wall and dust lead
Groove connects, while sets recessing groove, when cutter head is snapped fit onto on cutter hub, enables what installation axle was connected by mounting hole with dregs guiding groove
Position is moved into mounting hole, then rotary cutter, so that the internal diameter of the outside diameter of installation axle and mounting hole is interference fitted, is then sticked into
Cutter head, while by the cooperation of installation axle and mounting hole, realize the radial positioning of cutter head.
And during processing mounting holes, carry out turning process, and can one-time positioning clamp cutter hub and process, tentatively ensure itself and knife
The concentricity of body shank, after cutter hub quenching treatment, then is ground mounting hole, finally ensures that it is coaxial with cutter hub shank
Degree；When processing installation axle, cylindrical grinding process is substantially carried out, is clamped and processed using same origin reference location.Simplify manufacturing procedure,
Improve processing efficiency.
Mounting structure on existing cutter hub is complicated, can not be completed using common plane grinding method, it is necessary to using processing
The NC milling of the high numerical control machining center of expense is completed, therefore processing cost is very high.Even with processing
The NC milling of the heart, its Milling Accuracy and is milled face quality also below grinding accuracy and ground face quality.It is common flat
Face grinding machine price ten is tens of thousands of, and machining center price it is few 3,000,000, more is up to ten million, and processing cost difference is obvious, for not having
The enterprise of machining center, original structure drill bit can not just produce.
And in the utility model, the structure design of the straight slot on cutter hub so that positioning supporting surface of the cutter hub to cutter head becomes
The parallel groove type of one both ends open；The side wall of cutter head is arranged to plane at the same time, then makes cutter hub straight slot and cutter head plane
The processing of side wall, the mode that can be very easily ground using common plane are completed, and precision is very easy to ensure, processing cost
It is extremely low.
Further, one end close to cutter head on the mounting hole is provided with straight slot, the axis of the straight slot and installation
The axis in hole intersects vertically, and the cell wall on straight slot close to dregs guiding groove is connected with dregs guiding groove；
When cutter hub is clamped with cutter head, one end on cutter head close to cutter hub is located in straight slot, close to the end of cutter hub on cutter head
Face is contacted with the slot bottom of straight slot, and one end away from cutter hub is smoothly transitted on cutter hub on the end face of cutter head, at the same time on cutter head
End face on cutter hub close to cutter head is smoothly transitted on the side wall of cutter hub；During drill bit drilling, the cell wall away from dregs guiding groove on straight slot
Play a supporting role to cutter head.
Cutter head can be subject to the opposition for coming from object to be processed when having a shave to bottom hole, and cutter head bears circumference side
To with cutting force opposite effect power, only realize fixation of the cutter head in cutting by the interference fit of mounting hole and installation axle
Stability it is relatively low, therefore set straight slot so that cutter head be subject to when having a shave the acting in opposition for coming from object to be processed when,
The cell wall away from dregs guiding groove plays a supporting role cutter head on straight slot, prevents cutter head from producing rotation relative to cutter hub, improves cutter head
The stability that installation and drill bit are cut when having a shave.
Further, the axis around the cutter hub rotates cutter hub, close to one end of cutter head and is located at straight slot two on cutter hub
The end face of side can be projected out the arc sideline of the concyclic heart each other, the center of circle in this arc sideline on the plane parallel to cutter hub axis
Close to the mounting portion of drill bit, and on the axis of drill bit.Preferably, the radius in this arc sideline is less than the radius of cutting edge.
Further, the bottom hole of the mounting hole is provided with card hole of the aperture more than mounting hole, the card hole
Axis is overlapped with the axis of mounting hole, and one end away from cutter head is provided with screens journal stirrup on the side wall of installation axle；The screens
The side wall away from installation axle is arcwall face on journal stirrup, and the axis of this arcwall face is located in installation axle；
When cutter hub is clamped with cutter head, screens journal stirrup is located in card hole, close to the end face of cutter head and screens on screens journal stirrup
Close to the end contact of cutter head on hole, and the length dimension of installation axle vertically is less than size of the mounting hole along axial length.
The length dimension of installation axle vertically is less than size of the mounting hole along axial length, so that installation axle exists with mounting hole
It is interference fitted on axis, realizes the positioning of installation axle axial direction：End face on cutter head close to cutter hub is close to the slot bottom of straight slot, screens
It is close on journal stirrup close to the end face of cutter head with the end face in card hole close to cutter head.
Further, one end close to cutter head on the hole wall of the card hole is provided with chamfering I, is leaned in the chamfering I
One end of nearly cutter head and the hole wall of mounting hole connect；
One end close to cutter head on the arcwall face of screens journal stirrup is provided with chamfering II, close to cutter head in the chamfering II
The side wall of one end and installation axle connects；When cutter hub is clamped with cutter head, chamfering I is contacted with chamfering II.
II chamfer angle of chamfering I and chamfering is consistent, can be 30 °, 45 ° or 60 ° etc..
Face of being close between screens journal stirrup and card hole is arranged to fillet surface, when cutter head is not only installed, can successfully be led to
Cross one of chamfering screens journal stirrup is caught in card hole, and be also convenient for its processing, while reduce screens journal stirrup and installation axle
Between connecting portion stress, improve its service life.
Further, the screens journal stirrup has two, and is symmetrically disposed in installation axle along the axis centre of installation axle
On side wall.One end away from cutter head is provided with chamfering III on the arcwall face of the screens journal stirrup.
Multiple journal stirrups are symmetrically arranged, easy to make installation axle obtain stable axial locating force, are carried out beneficial to bulb counterbit
Have a shave.The setting of chamfering III avoids cutter head in holding or movement, on the arcwall face of screens journal stirrup away from cutter head one end with
Foreign object is collided and damaged.
Further, two ends being connected parallel to installation axle axis on the screens journal stirrup and with the side wall of installation axle
Chamfering IV is both provided with face, the side wall of installation axle is smoothly transitted on the arcwall face of screens journal stirrup by corresponding chamfering IV.
Screens journal stirrup, when being further easily installed cutter head, can successfully be caught in card hole, together by the setting of chamfering IV
When, the stress of connecting portion between screens journal stirrup and installation axle is further reduced, improves its service life.Dust lead on cutter hub
Groove is connected with the chip pocket on cutter head to be connect together, easy to which the chip of drilling is discharged.
The utility model compared with prior art, has the following advantages and advantages：
1st, the utility model bulb counterbit, it is special to some to come by using the bulb counterbit gone out designed by the utility model
The bottom hole in hole carries out arc and has a shave, and the opposite time with for traditional process tool, shortening needed for processing arcuate socket bottom, carries
High processing efficiency, and the arcuate socket bottom obtained by bulb counterbit and the concentricity in hole are high；
2nd, the utility model bulb counterbit, long-term drilling are had a shave in operation, and cutting edge is the portion that most serious is worn on drill bit
Position.When the cutting edge of drill bit is worn, it is necessary to more bit change.The mode high expensive of this more bit change entirety, therefore will
Drill bit is split as cutter head and cutter hub, while cutter head is connected on cutter hub by the interference fit of installation axle and mounting hole, is cut with working as
When cutting sword and being worn, it is only necessary to replace cutter head, reduce drilling and have a shave cost；
3rd, the utility model bulb counterbit, cutter head can be subject to come from the reverse of object to be processed when having a shave to bottom hole
Active force, i.e. cutter head can bear circumferencial direction with cutting force opposite effect power, and only by the interference of mounting hole and installation axle
Coordinate the stability to realize fixation of the cutter head in cutting relatively low, therefore straight slot is set, so that what cutter head was subject to when having a shave
When coming from the opposition of object to be processed, the cell wall away from dregs guiding groove plays a supporting role cutter head on straight slot, prevents
Cutter head produces rotation relative to cutter hub, improves the stability cut when cutter head installation is had a shave with drill bit；
4th, the utility model bulb counterbit, the structure design of the straight slot on cutter hub so that positioning support of the cutter hub to cutter head
Face becomes the parallel groove type of a both ends open；The side wall of cutter head is arranged to plane at the same time, then makes cutter hub straight slot and knife
The processing of head plane side wall, the mode that can be very easily ground using common plane are completed, and precision is very easy to ensure, adds
Work cost is extremely low.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, does not form the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the end view of the utility model
Fig. 3 is the side view of the utility model；
Fig. 4 is the structure diagram of cutter hub；
Fig. 5 is the partial enlarged view at mounting hole；
Fig. 6 is the side view of cutter hub；
Fig. 7 is the vertical section structure schematic diagram of cutter hub axis；
Fig. 8 is the end view of cutter hub；
Fig. 9 is B direction views in 9 in figure；
Figure 10 is the structure diagram of cutter head；
Figure 11 is the side view of cutter head；
Figure 12 is the sectional view of the C-C along Figure 12；
Figure 13 is cutter head end view；
Figure 14 is the sectional view of the D-D along Figure 14；
Figure 15 is position view when cutter head is installed to cutter hub.
Mark and corresponding parts title in attached drawing：
1- drill bits, 2- cutter hubs, 3- cutter heads, 4- mounting holes, 5- installation axles, 6- straight slots, 7- dregs guiding grooves, 8- recessing grooves, 9- grooves
Wall, 10- card holes, 11- screens journal stirrups, 12- slot bottoms, 13- chamferings I, 14- chamferings II, 15- chip pockets, 16- chamferings III, 17- falls
Angle IV, 18- cutting edges.
Embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model, is not intended to limit the scope of the present invention.
Embodiment 1
As shown in Fig. 1-Figure 15, the utility model bulb counterbit, including drill bit 1, the cutting edge 18 of the drill bit 1 is arc
Shape, its center of circle close to drill bit 1 mounting portion, and positioned at drill bit 1 axis on, and drill bit 1 drill when, cutting edge 18 is around drill bit
1 axis rotational energy is by the bottom hole drilling in the hole being drilled into hemisphere face.
In use, first drilled with conventional bit, it is right using the bulb counterbit designed by the utility model when having a shave
Bottom hole is had a shave, so that it is configured to arc.
Have a shave by using the bulb counterbit gone out designed by the utility model to carry out arc to the bottom hole of some special holes,
The opposite time with for traditional process tool, shortening needed for processing arcuate socket bottom, improves processing efficiency, and pass through ball
The arcuate socket bottom and the concentricity in hole that head counterbit obtains are high.
Embodiment 2
The present embodiment is on the basis of embodiment 1, and cutting edge 18 is further illustrated.
As shown in Fig. 1-Figure 15, the utility model bulb counterbit, around the axis rotary drilling-head 1 of the drill bit 1, cutting edge
18 when the orthographic projection on the plane parallel to 1 axis of drill bit is most long, and the orthographic projection at this time of cutting edge 18 is semicircle or major arc.
Using the bulb counterbit designed by the utility model, have a shave to bottom hole so that it is configured to arc, preferably into
Shape is hemisphere face.
Embodiment 3
The present embodiment is on the basis of embodiment 1, and drill bit 1 is further illustrated.
As shown in Fig. 1-Figure 15, the utility model bulb counterbit, the drill bit 1 includes the cutter hub 2 being detachably connected with each other
With cutter head 3, the cutting edge 18 is located at one end away from cutter hub 2 on cutter head 3, on the cutter hub 2 on the end face of cutter head 3
Mounting hole 4 is provided with, the axis of the mounting hole 4 is overlapped with the axis of cutter hub 2, close to one end of cutter hub 2 on the cutter head 3
It is provided with installation axle 5, the installation axle 5 is inserted into mounting hole 4 so that cutter hub 2 is clamped with cutter head 3, and installation axle 5 and mounting hole 4
Interference fit.
Long-term drilling is had a shave in operation, and cutting edge 18 is the position that most serious is worn on drill bit 1.When the cutting edge of drill bit 1
18 when being worn, it is necessary to more bit change 1.The overall mode high expensive of this more bit change 1, therefore drill bit 1 is split as knife
First 3 and cutter hub 2, while cutter head 3 is connected on cutter hub 2 by the interference fit of installation axle 5 and mounting hole 4, with when cutting edge 18
When being worn, it is only necessary to replace cutter head 3, reduce drilling and have a shave cost.
Embodiment 4
The present embodiment is on the basis of embodiment 3, and the clamping between cutter head 3 and cutter hub 2 is further illustrated.
As shown in Fig. 1-Figure 15, the utility model bulb counterbit, on the mounting hole 4 close to dregs guiding groove 7 hole wall with
Dregs guiding groove 7 connects, and the aperture of mounting hole 4 is less than the outside diameter of installation axle 5；
It is provided with recessing groove 8 on the side wall of the installation axle 5, the axis of the axis of the recessing groove 8 parallel to installation axle 5
Line, and recessing groove 8 has two, and be symmetrically disposed in along the axis centre of installation axle 5 on the side wall of installation axle 5；
(size f) shown in Figure 12 is less than the width that mounting hole 4 is connected with dregs guiding groove 7 to maximum spacing between recessing groove 8
Size (size F shown in Fig. 8), is easily installed axis 5 and is passed through by mounting hole 4 and 7 connectivity part of dregs guiding groove, as shown in figure 15, will
Installation axle 5 rotates to position shown in Figure 15, and is connected along direction shown in arrow through mounting hole 4 with dregs guiding groove 7, and is moved to
In mounting hole 4.
Since the aperture of mounting hole 4 is less than the outside diameter of installation axle 5, cutter hub 2 passes through mounting hole 4 and installation axle 5 with cutter head 3
When being interference fitted clamping connection each other, therefore being directly inserted into installation axle 5 in mounting hole 4, required dynamics is very big, and is not easy to pacify
Dress axis 5 exits from mounting hole 4, replaces cutter head 3；In order to avoid the generation of the above problem, by close dregs guiding groove 7 on mounting hole 4
Hole wall connected with dregs guiding groove 7, while recessing groove 8 is set, when cutter head 3 is snapped fit onto on cutter hub 2, installation axle 5 is passed through
The position that mounting hole 4 is connected with dregs guiding groove 7 is moved into mounting hole 4, then rotary cutter 3, so that the outside diameter of installation axle 5 and installation
The internal diameter interference fit in hole 4, then sticks into cutter head 3, while by the cooperation of installation axle 5 and mounting hole 4, realizes the radial direction of cutter head
Positioning.
And during processing mounting holes 4, carry out turning process, and can one-time positioning clamp cutter hub and process, tentatively ensure its with
The concentricity of cutter hub shank, after cutter hub quenching treatment, then is ground mounting hole, finally ensures that it is coaxial with cutter hub shank
Degree；When processing installation axle, cylindrical grinding process is substantially carried out, is clamped and processed using same origin reference location.Simplify manufacturing procedure,
Improve processing efficiency.
Mounting structure on existing cutter hub 2 is complicated, can not be completed using common plane grinding method, it is necessary to using processing
The NC milling of the high numerical control machining center of expense is completed, therefore processing cost is very high.Also, even with plus
The NC milling at work center, its Milling Accuracy and is milled face quality also below grinding accuracy and ground face quality.It is general
Logical surface grinding machine price ten is tens of thousands of, and machining center price it is few 3,000,000, more is up to ten million, and processing cost difference is obvious, for
There is no the enterprise of machining center, original structure drill bit can not just produce.
And in the utility model, the structure design of the straight slot 6 on cutter hub 2 so that positioning supporting surface of the cutter hub 2 to cutter head 3
As the parallel groove type of a both ends open；The side wall of cutter head 3 is arranged to plane (3 end view of cutter head in such as Figure 13 at the same time
In a pair of parallel straight line be the parallel side wall on cutter head 3 projection line), then make 2 straight slot 6 of cutter hub and 3 plane of cutter head
The processing of side wall, the mode that can be very easily ground using common plane are completed, and precision is very easy to ensure, processing cost
It is extremely low.
Further, one end close to cutter head 3 on the mounting hole 4 is provided with straight slot 6, the axis of the straight slot 6 with
The axis of mounting hole 4 intersects vertically, and the cell wall on straight slot 6 close to dregs guiding groove 7 is connected with dregs guiding groove 7；
When cutter hub 2 is clamped with cutter head 3, one end on cutter head 3 close to cutter hub 2 is located in straight slot 6, and close to knife on cutter head 3
One end of body 2 is located in straight slot 6, and the end face on cutter head 3 close to cutter hub 2 is contacted with the slot bottom 12 of straight slot 6, and remote on cutter head 3
One end of cutter hub 2 is smoothly transitted on cutter hub 2 on the end face of cutter head 3, while the end face on cutter hub 2 close to cutter head 3 is smooth
It is transitioned on the side wall of cutter hub 2；During 1 drilling of drill bit, the cell wall 9 away from dregs guiding groove 7 plays a supporting role cutter head 3 on straight slot 6.
Cutter head 3 can be subject to the opposition for coming from object to be processed when having a shave to bottom hole, and cutter head bears circumference side
To with cutting force opposite effect power, only realize fixation of the cutter head in cutting by the interference fit of mounting hole and installation axle
Stability it is relatively low, therefore set straight slot 6 so that the acting in opposition for coming from object to be processed that cutter head 3 is subject to when having a shave
During power, the cell wall 9 away from dregs guiding groove 7 plays a supporting role cutter head 3 on straight slot 6, prevents cutter head 3 from producing rotation relative to cutter hub 2,
Improve the stability cut when cutter head installation is had a shave with drill bit.
Further, close to one end of cutter head 3 and positioned at logical on the axis rotation cutter hub 2 of the cutter hub 2, cutter hub 2
The end face of 6 both sides of groove can be projected out the arc sideline of the concyclic heart each other, this arc sideline on the plane parallel to 2 axis of cutter hub
The center of circle close to drill bit 1 mounting portion, and positioned at drill bit 1 axis on.Preferably, the radius in this arc sideline is less than cutting edge
18 radius, chooses the small 1mm of radius of the radius ratio cutting edge 18 in this arc sideline.
Embodiment 5
The present embodiment is on the basis of embodiment 4, and the clamping between cutter head 3 and cutter hub 2 is further illustrated.
As shown in Fig. 1-Figure 15, the utility model bulb counterbit, is provided with aperture in the bottom hole of the mounting hole 4 and is more than peace
The card hole 10 in hole 4 is filled, the axis of the card hole 10 is overlapped with the axis of mounting hole 4, away from knife on the side wall of installation axle 5
First 3 one end is provided with screens journal stirrup 11；The side wall away from installation axle 5 is arcwall face on the screens journal stirrup 11, this arcwall face
Axis be located in installation axle 5；
When cutter hub 2 is clamped with cutter head 3, screens journal stirrup 11 is located in card hole 10, close to the end of cutter head 3 on screens journal stirrup 11
Face and the end contact in card hole 10 close to cutter head 3, and the length dimension of installation axle 5 vertically is less than mounting hole 4 along axis
The size of length.
The length dimension of installation axle 5 vertically is less than size of the mounting hole 4 along axial length, so that installation axle 5 and installation
Hole 4 is interference fitted on axis, realizes the axial positioning of installation axle 5：Close to the end face (m shown in Figure 14 of cutter hub 2 on cutter head 3
Face) be close to (M faces shown in Fig. 7) with the slot bottom 12 of straight slot 6, on screens journal stirrup 11 on the end face and card hole 10 of cutter head 3
It is close to close to the end face of cutter head 3.
Embodiment 6
The present embodiment is on the basis of embodiment 5, and screens journal stirrup 11 is further illustrated.
As shown in Fig. 1-Figure 15, the utility model bulb counterbit, close to the one of cutter head 3 on the hole wall of the card hole 10
End is provided with chamfering I 13, is connected in the chamfering I 13 close to one end of cutter head 3 with the hole wall of mounting hole 4；
One end close to cutter head 3 on the arcwall face of screens journal stirrup 11 is provided with chamfering II 14, is leaned in the chamfering II 14
One end of nearly cutter head 3 is connected with the side wall of installation axle 5；When cutter hub 2 is clamped with cutter head 3, chamfering I 13 is contacted with chamfering II 14.
II 14 chamfer angles of chamfering I 13 and chamfering are consistent, are 45 °.
Above-described embodiment, the purpose of this utility model, technical solution and beneficial effect have been carried out into
One step describes in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, where within the spirit and principles of the present invention, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of this utility model.
Claims (10)
1. bulb counterbit, including drill bit (1), it is characterised in that：The cutting edge (18) of the drill bit (1) is arc, its center of circle is leaned on
The mounting portion of nearly drill bit (1), and on the axis of drill bit (1), and during drill bit (1) drilling, cutting edge (18) is by what is be drilled
The bottom hole drilling in hole is into half concave spherical surface or bad concave spherical surface.
2. bulb counterbit according to claim 1, it is characterised in that：Around the axis rotary drilling-head of the drill bit (1)
(1), cutting edge (18) is when the orthographic projection on the plane parallel to drill bit (1) axis is most long, cutting edge (18) orthographic projection at this time
For semicircle or major arc.
3. bulb counterbit according to claim 1, it is characterised in that：The drill bit (1) includes what is be detachably connected with each other
Cutter hub (2) and cutter head (3), the cutting edge (18) is located at one end away from cutter hub (2) on cutter head (3), on the cutter hub (2)
Mounting hole (4) is provided with the end face of cutter head (3), the axis of the mounting hole (4) is overlapped with the axis of cutter hub (2),
One end on the cutter head (3) close to cutter hub (2) is provided with installation axle (5), in installation axle (5) the insertion mounting hole (4) with
Cutter hub (2) is set to be clamped with cutter head (3).
4. bulb counterbit according to claim 3, it is characterised in that：Close to the hole of dregs guiding groove (7) on the mounting hole (4)
Wall is connected with dregs guiding groove (7), and the aperture of mounting hole (4) is less than the outside diameter of installation axle (5)；
Recessing groove (8) is provided with the side wall of the installation axle (5), the axis of the recessing groove (8) is parallel to installation axle (5)
Axis, and recessing groove (8) has two, and is symmetrically disposed in the side walls of installation axle (5) along the axis centre of installation axle (5)
On；
The maximum width dimensions for being smaller than mounting hole (4) and dregs guiding groove (7) connectivity part between recessing groove (8).
5. bulb counterbit according to claim 4, it is characterised in that：Close to the one of cutter head (3) on the mounting hole (4)
End is provided with straight slot (6), and the axis of the axis and mounting hole (4) of the straight slot (6) intersects vertically, and close on straight slot (6) leads
The cell wall of bits groove (7) is connected with dregs guiding groove (7)；
When cutter hub (2) is clamped with cutter head (3), one end on cutter head (3) close to cutter hub (2) is located in straight slot (6), and cutter head (3)
The upper end face close to cutter hub (2) is contacted with the slot bottom (12) of straight slot (6), and one end away from cutter hub (2) seamlessly transits on cutter head (3)
On to cutter hub (2) on the end face of cutter head (3), while the end face on cutter hub (2) close to cutter head (3) is smoothly transitted into cutter hub
(2) on side wall；During drill bit (1) drilling, the cell wall (9) away from dregs guiding groove (7) plays cutter head (3) support and makees on straight slot (6)
With.
6. bulb counterbit according to claim 5, it is characterised in that：Axis around the cutter hub (2) rotates cutter hub
(2), close to one end of cutter head (3) and can be parallel to cutter hub (2) axis positioned at the end face of straight slot (6) both sides on cutter hub (2)
Be projected out the arc sideline of the concyclic heart each other in plane, the center of circle in this arc sideline close to drill bit (1) mounting portion, and positioned at boring
On the axis of head (1).
7. bulb counterbit according to claim 5, it is characterised in that：The bottom hole of the mounting hole (4) is provided with aperture
More than the card hole (10) of mounting hole (4), the axis of the card hole (10) is overlapped with the axis of mounting hole (4), in installation axle
(5) one end away from cutter head (3) is provided with screens journal stirrup (11) on side wall；
When cutter hub (2) is clamped with cutter head (3), screens journal stirrup (11) is located in card hole (10), close to knife on screens journal stirrup (11)
The end face of head (3) and the end contact in card hole (10) close to cutter head (3), and the length dimension of installation axle (5) vertically is small
In size of the mounting hole (4) along axial length.
8. bulb counterbit according to claim 7, it is characterised in that：Close to cutter head on the hole wall of the card hole (10)
(3) one end is provided with chamfering I (13), connects on the chamfering I (13) close to one end of cutter head (3) and the hole wall of mounting hole (4)
Connect；
One end close to cutter head (3) on the arcwall face of screens journal stirrup (11) is provided with chamfering II (14), the chamfering II (14)
Upper one end close to cutter head (3) is connected with the side wall of installation axle (5)；When cutter hub (2) is clamped with cutter head (3), chamfering I (13) is with falling
Angle II (14) contacts.
9. the bulb counterbit according to claim 7 or 8, it is characterised in that：The screens journal stirrup (11) has two, and along peace
The axis centre of dress axis (5) is symmetrically disposed on the side wall of installation axle (5).
10. the bulb counterbit according to claim 7 or 8, it is characterised in that：Away from installation axle on the screens journal stirrup (11)
(5) side wall is arcwall face, and the axis of this arcwall face is located in installation axle (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721370497.1U CN207255315U (en) | 2017-10-23 | 2017-10-23 | Bulb counterbit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721370497.1U CN207255315U (en) | 2017-10-23 | 2017-10-23 | Bulb counterbit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207255315U true CN207255315U (en) | 2018-04-20 |
Family
ID=61915823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721370497.1U Expired - Fee Related CN207255315U (en) | 2017-10-23 | 2017-10-23 | Bulb counterbit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207255315U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014172A (en) * | 2019-05-10 | 2019-07-16 | 国宏工具系统（无锡）股份有限公司 | Process the PCD molding cutter of aviation composite |
| CN112100754A (en) * | 2020-08-05 | 2020-12-18 | 广东长盈精密技术有限公司 | Processing method of constant-width chamfer |
| CN112676765A (en) * | 2020-12-30 | 2021-04-20 | 西安成立航空制造有限公司 | Inner spherical surface machining process |
-
2017
- 2017-10-23 CN CN201721370497.1U patent/CN207255315U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014172A (en) * | 2019-05-10 | 2019-07-16 | 国宏工具系统（无锡）股份有限公司 | Process the PCD molding cutter of aviation composite |
| CN112100754A (en) * | 2020-08-05 | 2020-12-18 | 广东长盈精密技术有限公司 | Processing method of constant-width chamfer |
| CN112100754B (en) * | 2020-08-05 | 2024-05-17 | 广东长盈精密技术有限公司 | Method for machining equal-width chamfer |
| CN112676765A (en) * | 2020-12-30 | 2021-04-20 | 西安成立航空制造有限公司 | Inner spherical surface machining process |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 |