CN2600204Y - Abandoned type drilling bit - Google Patents
Abandoned type drilling bit Download PDFInfo
- Publication number
- CN2600204Y CN2600204Y CN 02257836 CN02257836U CN2600204Y CN 2600204 Y CN2600204 Y CN 2600204Y CN 02257836 CN02257836 CN 02257836 CN 02257836 U CN02257836 U CN 02257836U CN 2600204 Y CN2600204 Y CN 2600204Y
- Authority
- CN
- China
- Prior art keywords
- blade
- center
- drill
- cutting
- centre drill
- 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 - Lifetime
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Abstract
The utility model discloses an abandoned type drilling bit, which mainly lies in the location of a center blade base at the center position of the aiguille end, and the fixation of center drilling blade. The knife-holding bases are arranged in parallel on the two sides of the center blade base, and inner blade and outer blade are fixed on the knife-holding base; a formed extending blade is arranged on one side of the center drill of the center drilling blade. The extending blade can expand the drilling area of the center drilling blade and extend the blade to avoid blade attrition and crack due to the stack of drilling iron dust. A gap is arranged between the extending blade and the center dill to separate the cutting force so as to avoid the crack of blade; in addition, sloping pigeon tail shape is arranged on the center drilling blade and the center drilling blade base of the dill to provide good supporting rigidness for the center drilling blade and to enhance the cutting effectiveness.
Description
Technical field
The utility model relates to a kind of drill bit, refers to a kind of disposable type drill bit especially.
Background technology
The disposable type drill bit of generally commonly using as shown in Figure 8, the one chip disposable type drill bit 10 that it is produced for KENNAMETEL HERTEL company of world-famous manufacturer, on the blade of brill edge (dead point) 12 both sides of blade 11, be provided with several chip breaking mouths 13, this chip breaking mouth can produce chip breaking and can dwindle chip volume, but will make cutting blade at chip breaking mouth 13 positions and bore the discontinuous cutting of edge 12 generations, therefore iron filings will concentrate on this, add more near centre drill edge 12 places, its rotating speed is slower, cutting resistance of bearing relatively and pressure are also bigger, therefore will bear sizable pressure at the corner place of chip breaking mouth 13, and generation Integrated Chip pile-up, make the corner place of chip breaking mouth 13 be easy to produce the phenomenon of bursting apart, cause blade 11 to damage and can't use, this shortcoming can cause the burden on user's cost of charp tool.
In addition, see also shown in Figure 9, the disposable type drill bit 20 of the another kind of tool centre drill form that it is also produced for KENNAMETEL HERTEL company, the cutting blade blade of this drill tip comprises a centre drill 21, interior angle of throat 22 and outer angle of throat 23, and be all the structural design of disposable type, the design of the cutting blade of this type is especially at the adjoiner very easy generation Integrated Chip of cutting blade edge, the both sides of centre drill 21 and interior angle of throat 22 and outer angle of throat 23 and push edge (as arrow a, b indicates the position), the rotation rotating speed of adding herein is lower, the cutting resistance that is subjected to relatively is bigger, edge is easy to produce and bursts apart, especially at arrow a indication position the corner place of the interior angle of throat 22 of the terminal also adjacency of oblique blade of centre drill 21, this corner place is that cutting stress is concentrated the place, so this corner also is easy to generate the phenomenon of bursting apart, cause breaks down, and centre drill 21 cutters of this kind pattern are very expensive, improve dealer's production cost relatively.
The utility model content
Main purpose of the present utility model is to provide a kind of disposable type drill bit, and this drill bit can not produce cutting and pile up.
Secondary objective of the present utility model is to provide a kind of disposable type drill bit, and this drill bit can not produce stress and concentrate.
For achieving the above object, the utility model provides a kind of disposable type drill bit, mainly is to be provided with the center cutter bar in the drill tip center, locking centre drill blade on it, center cutter bar both sides are provided with and are the counterparty to the appearance tool rest that is provided with, and hold interior blade of locking and outer blade on the tool rest; Wherein: this centre drill blade heart therein bores a side and is provided with integrated extension cutting blade.
Described disposable type drill bit, wherein: the cutting blade of this centre drill one side is provided with breach with the corner place that is connected of extending cutting blade, and the cutting blade of centre drill opposite side can be with gap fill when rotary cutting.
Described disposable type drill bit, wherein: contiguous end face one side of this centre drill blade is made as hypotenuse, and opposite side is provided with parallel with central axis and is the inclined-plane of dovetail shape, is provided with the dovetail groove that is the inclined-plane in center cutter bar one side of drill bit, opposite side is made as hypotenuse, and is corresponding with the centre drill blade.
Described disposable type drill bit, wherein: this center cutter bar is provided with a screw, and this screw is corresponding to the counter sink of centre drill blade, and there is up a minor shifts amount at the relative counter sink center, center, hole of this screw.
After adopting such scheme, because the structural design of centre drill blade of the present utility model and drill bit makes it have following progressive effect and advantage:
1. the centre drill blade has centre drill and extends cutting blade and be made as one, this is the utility model initiative and unique design, have the bite cutting edge and avoid iron filings to hoard, and can avoid edge to produce the situation of bursting apart, promote the effect of cutting usefulness and production capacity in blade cutting blade mouth.
2. the centre drill of centre drill blade is provided with breach with the tie point place of extending cutting blade, this breach there is no the cutting function, therefore will extend the cutting blade mouth of cutting blade and centre drill and separate, and cutting stress can not compiled in indentation, there, blade cutting edge does not have the situation of bursting apart yet, and cutter life will be longer.
3. the centre drill blade is the inclined design of dovetail shape, the dovetail groove design of collocation bit central blade bearing, centre drill blade good supporting rigidity is provided, this structure Design can the plant mode be placed in the centre drill tool rest centre drill blade, displacement is convenient and easy, more make the centre drill blade that good cutting rigidity is arranged, effectively promote cutting power.
4. the counter sink of set screw of the center cutter bar of drill bit and centre drill blade has the eccentricity value of trace, and the centre drill blade can be offset by trace when locking, and is tighter with center cutter bar more lock, reaches the effect that complete driving fit locks.
5. the supporting blade of can arranging in pairs or groups is applied to deep hole drill.
6. blade and outer blade in the centre drill blade can be arranged in pairs or groups reach the good effect of changeableization of bit size and practicality.
Description of drawings
Fig. 1 is a three-dimensional exploded view of the present utility model;
Fig. 2 is a combination schematic diagram in plane of the present utility model;
Fig. 3 is the local enlarged diagram in the centre drill blade position of the utility model drill bit;
Fig. 4 is the enlarged diagram of the utility model centre drill blade;
Fig. 5 is a upward view of the present utility model;
Fig. 6 is the enforcement illustration of the utility model collocation supporting blade;
Fig. 7 is that the less drill bit of the utility model drill diameter size is implemented illustration;
Fig. 8 is a floor map of commonly using one chip disposable type drill bit;
Fig. 9 is a floor map of commonly using the disposable type drill bit of another type.
10 one chip disposable type drill bits, 11 blades
12 bore edge 13 chip breaking mouths 20 drill bits
Angle of throat 23 outer angle of throats in 21 centre drills 22
30 drill bits, 31 center cutter bars, 311 dovetail grooves
312 inclined-planes, 313 screws 32 hold tool rest
33 hold tool rest 40 centre drill blades 41 centre drills
411 cutting blades, 412 cutting blades 42 extend cutting blade
43 breach, 44 counter sinks, 45 hypotenuses
Blade in 46 inclined-planes, 47 screws 51
52 outer blade 53 supporting blades 54 supporting blades
Specific embodiment
At first see also Figure 1 and Figure 2, the structural improvement of the utility model disposable type drill bit mainly is to be provided with center cutter bar 31 in drill bit 30 terminal centers, in order to locking centre drill blade 40, center cutter bar 31 both sides are provided with and are the counterparty to the appearance tool rest 32,33 that is provided with, in order to blade in locking 51 and outer blade 52; Wherein:
One side of the center cutter bar 31 of drill bit 30 is provided with the dovetail groove 311 that is the inclined-plane, opposite side is made as hypotenuse 312, and it is corresponding with centre drill blade 40, this center cutter bar 31 is provided with a screw 313, as Fig. 1 and shown in Figure 4, this screw 313 is corresponding to the counter sink 44 of centre drill blade 40, and the center, hole of this screw 313 is made as the skew of slight distance up slightly partially, and side-play amount e is about 0.05mm.
According to above-mentioned architectural feature, progressive effect that the utility model had and architectural feature are described in more detail in the back:
One, the integrated extension cutting blade of centre drill blade can be eliminated the accumulation of smear metal:
See also Fig. 2 and shown in Figure 3, this centre drill blade 40 is provided with integrated extension cutting blade 42, make centre drill blade 40 except that centre drill 41 with drilling centre bore and positioning function, also increased extension cutting blade 42 with boring function, this extends cutting blade 42 promptly as the function of interior blade blade, function with drilling, its main purpose is the cutting blade 411 with 41 liang of V-arrangements of centre drill, 412 produce the function of cutting continuously, make the drilling iron filings can not be deposited between cutting blade 411 and the extension cutting blade 42, and this extension cutting blade 42 and interior blade 51 have the position of overlap cut, therefore iron filings can not be piled up between interior blade 51 and the centre drill blade 40 yet, thereby can not cause the friction injury and produce cutting resistance edge, therefore the edge of each blade can often be protected sharp, and the phenomenon of bursting apart that does not have improper cutting factors and produced, in the service life that helps the drilling operation and increase blade, reduce the number of times of replacement blades and reduce manufacturing cost.
Two, the concentrated elimination of cutting stress:
See also shown in Figure 3, this centre drill blade 40 is provided with breach 43 at the cutting blade 411 of centre drill 41 with the corner place that is connected of extending blade 42, this breach 43 will can not produce the cutting function, and by the cutting blade 412 of opposite side when the cutting to breach 43 covers (as the dotted line position), produce the function of cutting continuously, this breach 43 is because of being positioned at two cutting blades 411, in 412 the radius of clean-up, and can't produce the cutting function, therefore breach 43 makes extension cutting blade 42 not have the cutting intersection point with cutting blade 411, the cutting stress that is cutting blade 411 can not concentrate on breach 43 with the cutting stress that extends cutting blade 42, and blocked by breach 43 fully, so breach 43 places are not subjected to any cutting stress, breach 43 does not have the anxiety of bursting apart and considers, the cutting stress at breach 43 places is born by the cutting blade 412 of opposite side fully, and the drilling iron filings; The phenomenon that blade cutting blade stress is concentrated has been eliminated in the design of learning the utility model breach 43 thus fully, makes blade have better cutting power, increases the service life and can improve production capacity relatively.
Three, the structural design of the high rigidity of bit central blade bearing:
See also shown in Figure 1, the shape of center cutter bar 31 forms along with the shape of centre drill blade 41, the one side is set, and to be the dovetail groove 311 on inclined-plane corresponding with the inclined-plane 46 that centre drill blade 40 is the dovetail shape, opposite side is provided with hypotenuse 312, can centre drill blade 40 be sleeved in the center cutter bar 31 in the plant mode, see also shown in Figure 5, when cutting stress is born in drill blade 40 drillings in center (as the arrow position), 46 positions, inclined-plane of centre drill blade 40 are subjected to the support of dovetail groove 311, this dovetail groove 311 is the part of drill body, therefore dovetail groove 311 provides the rigidity of centre drill blade 40 enough impedance drilling stress, the cutting stress of centre drill blade 40 can not concentrated on the screw 47 of the blade that locks, but bear by dovetail groove 311, therefore centre drill blade 40 can bear high cutting resistance, the cutting rigidity promotes, and cutting power is also promoted.
Four, centre drill blade locking ability is good:
The center cutter bar 31 of drill bit 30 is provided with a screw 313, as Fig. 1 and shown in Figure 4, this screw 313 is corresponding to the counter sink 44 of centre drill blade 40, and the center, hole of this screw 313 is made as the skew of slight distance up slightly partially, side-play amount e is 0.05mm approximately slightly, side-play amount will make centre drill blade 40 minor shifts up whereby, when screw 47 packing centre drill blades 40, eccentric screw 47 towards superior displacement will also force centre drill blade 40 trace skew up by ejection counter sink 44 synchronously, and then force the hypotenuse 312 urgent lockings of centre drill blade 40 and center cutter bar 31, be closely as one, do not only depend on the solid anxiety of screw 47 spiral shells to consider and do not have, can guarantee the rigidity of centre drill blade 40 opposing cutting stress fully, practicality is splendid.
Five, collocation supporting blade, the brill body rigidity of lifting drill bit:
See also shown in Figure 6, the appropriate location is provided with supporting blade 53 above the blade 52 outside interior blade 51 reaches, 54, this supporting blade 53,54 cutting is measure-alike in outer blade 52 (both drilling apertures), therefore when drilling, by interior blade 51, the drilling operation of outer blade 52 and centre drill blade 40, and two supporting blades 53 up, 54 hole faces that pasting drilling, produce and support the function of boring body, the rigidity of boring body is promoted widely, therefore can be applied in the enforcement of deep hole drill, can carry out gun drilling, no matter make that the utility model is that general drilling or gun drilling are all applicable, practicality is extensive, the utilization rate height.
Six, bit size changes many:
The size of the utility model bit size will affect the design of blade structure, therefore the variation of blade 51 and outer blade 52 collocation bit sizes is established in, the less drill bit of the size interior blade 51 of only need arranging in pairs or groups, larger-size interior blade 51 and the outer blade 52 of then need arranging in pairs or groups, therefore blade 51 and outer blade 52 change combination in 40 collocation of centre drill blade along with bit size, as shown in Figure 7, be the less drill bit embodiment of drill diameter size, these all belong to category of the present utility model and Application Example.
Claims (4)
1, a kind of disposable type drill bit mainly is to be provided with the center cutter bar in the drill tip center, locking centre drill blade on it, and center cutter bar both sides are provided with and are the counterparty to the appearance tool rest that is provided with, and hold interior blade of locking and outer blade on the tool rest; It is characterized in that: this centre drill blade heart therein bores a side and is provided with integrated extension cutting blade.
2, disposable type drill bit as claimed in claim 1 is characterized in that: the cutting blade of this centre drill one side is provided with breach with the corner place that is connected of extending cutting blade, and the cutting blade of centre drill opposite side can be with gap fill when rotary cutting.
3, disposable type drill bit as claimed in claim 1, it is characterized in that: contiguous end face one side of this centre drill blade is made as hypotenuse, opposite side is provided with parallel with central axis and is the inclined-plane of dovetail shape, center cutter bar one side at drill bit is provided with the dovetail groove that is the inclined-plane, opposite side is made as hypotenuse, and is corresponding with the centre drill blade.
4, disposable type drill bit as claimed in claim 1 is characterized in that: this center cutter bar is provided with a screw, and this screw is corresponding to the counter sink of centre drill blade, and there is up a minor shifts amount at the relative counter sink center, center, hole of this screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02257836 CN2600204Y (en) | 2002-10-15 | 2002-10-15 | Abandoned type drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02257836 CN2600204Y (en) | 2002-10-15 | 2002-10-15 | Abandoned type drilling bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2600204Y true CN2600204Y (en) | 2004-01-21 |
Family
ID=34149966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02257836 Expired - Lifetime CN2600204Y (en) | 2002-10-15 | 2002-10-15 | Abandoned type drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2600204Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI554350B (en) * | 2014-08-05 | 2016-10-21 | Hsin Tien Chang | Discarded reamer |
| CN108927555A (en) * | 2018-09-11 | 2018-12-04 | 浙江甬岭数控刀具有限公司 | Indexable depth drill |
-
2002
- 2002-10-15 CN CN 02257836 patent/CN2600204Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI554350B (en) * | 2014-08-05 | 2016-10-21 | Hsin Tien Chang | Discarded reamer |
| CN108927555A (en) * | 2018-09-11 | 2018-12-04 | 浙江甬岭数控刀具有限公司 | Indexable depth drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121015 Granted publication date: 20040121 |