CN104802245B - Chit drill - Google Patents
Chit drill Download PDFInfo
- Publication number
- CN104802245B CN104802245B CN201410032765.3A CN201410032765A CN104802245B CN 104802245 B CN104802245 B CN 104802245B CN 201410032765 A CN201410032765 A CN 201410032765A CN 104802245 B CN104802245 B CN 104802245B
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- China
- Prior art keywords
- shoulder
- groove
- blade
- flat knife
- chit drill
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G15/00—Boring or turning tools; Augers
Abstract
The invention discloses a kind of chit drills, it is characterized in that, including shank, with the flat knife portion for being formed in the shank forward, the front in the flat knife portion extends internally respectively from both sides, form two shoulders, first shoulder and the second shoulder, two shoulders continue inwardly to collapse upwards and extend, it is respectively formed two and gathers portion, first, which gathers portion and second, gathers portion, and a pinnacle is formed at top, the first groove is formed to the inside in flat knife portion in the blade of the first shoulder, the inward flange of first groove to the first shoulder lateral direction diagonally downward, the angle greater than 0 degree is formed with the horizontal horizontal line of chit drill.
Description
Technical field
The present invention relates to a kind of drill bits for drilling, more particularly to a kind of chit drill.
Background technique
Chit drill is usually a kind of tool of carpenter's drilling.This bore is easy to control the depth in hole, thus be suitable for boring compared with
Shallow hole, is also applied for holes drilled through, so be widely used wood materials or other similar materials.
As shown in Figure 1, usually chit drill includes a shank 1, and it is formed in a thin and thick of shank forward uniformly flat knife
The two sides in portion 2, the front in flat knife portion extend internally along horizontal crossline direction respectively, form a pair of of shoulder 21 and 22, and shoulder continues
It collapses and extends obliquely, be respectively formed two and gather portion 23 and 24, and form a pinnacle 25 at top.From the main blade of shoulder
Edge starts to form a groove 211 inwardly downward, and the inward flange 212 of groove is parallel with the shoulder in flat knife portion 2.The work of groove
Be can blade cut wood chip after, wood chip be exported.
The chit drill as shown in United States Patent (USP) US5452970, two shoulder are into radial tilt upward.The master of shoulder
Blade edge starts to form a groove inwardly downward, and the inward flange of groove is substantially parallel with shoulder, equally tilts upward.
In United States Patent (USP) US7473056, the as groove inward flange example parallel with the horizontal shoulders in flat knife portion,
A kind of shape of groove of the patent diselosesll, so as to be easier discharge sawdust faster when drilling using chit drill, however
Those skilled in the art is to this structure but without further deeply recognizing.
Summary of the invention
The object of the present invention is to provide a kind of chit drill, the speed that chit drill can be made to drill is further speeded up.
To achieve the above object, the present invention provides a kind of chit drills, which is characterized in that including shank, and is formed in described
The flat knife portion of shank forward, extending internally respectively from both sides for the front in the flat knife portion, forms two shoulders, the first shoulder
With the second shoulder, described two shoulders continue inwardly to collapse upwards and extend, and are respectively formed two and gather portion, and first gathers portion and the
Two gather portion, and form a pinnacle at top, form the first groove to the inside in flat knife portion in the blade of first shoulder,
The inward flange of first groove diagonally downward, is formed greatly to the first shoulder lateral direction with the horizontal horizontal line of the chit drill
In 0 degree of angle.
The horizontal horizontal line of chit drill described in the inward flange of first groove forms the angle less than or equal to 60 degree.
The horizontal horizontal line of chit drill described in the inward flange of first groove forms the angle less than or equal to 30 degree.
The horizontal horizontal line of chit drill described in the inward flange of first groove forms the angle more than or equal to 2 degree.
The horizontal horizontal line of chit drill described in the inward flange of first groove, which is formed, to be more than or equal to 15 degree and is less than or equal to 30 degree
Angle.
The second groove is formed to the inside in the flat knife portion in the blade that described first gathers portion.
The flat knife portion has obverse and reverse, and positive first shoulder and first bunched portion are not formed just
The blade of first shoulder in face and first gather portion blade, second shoulder and the other shape of second bunched portion of reverse side
Gather the blade in portion at the blade of the second shoulder of reverse side and second.
There are two substantially parallel the first sides and the second side for the flat knife portion tool.
The feature of the obverse and reverse in the flat knife portion is identical.
The interior edge of second groove with described first gather portion blade it is substantially parallel.
The horizontal horizontal line be line substantially vertical with first side or second side, or for described in upper view
The parallel horizontal line in shank bottom edge.
First shoulder and the second shoulder inwardly prolong from first side and second side are substantially vertical respectively
It stretches.
The two sides of first shoulder and the second shoulder from the flat knife portion front are inwardly angled to be extended downwardly, and forms two
Outside radial shoulder.
The corner of two sides of the flat knife portion front, the first side and the second side all has the point stretched out upwards
Thorn.
The two sides of two shoulders of the flat knife portion front have the corner scabbled.
The tail portion of the shank forms hexagon interconnecting piece, also has a ring-shaped depression on the hexagon interconnecting piece.
The obverse and reverse in the flat knife portion is inclined for axis in the position with the shank junction
Inclined-plane has certain angle between obverse and reverse.
First groove is deeper than second depth of groove.
First groove is a smooth concave surface.
The smooth concave surface of first groove includes the first cambered surface since the blade of shoulder, and in the first groove
Second cambered surface of edge.
Described includes the straight third face for connecting first cambered surface and the second cambered surface.
Second groove be an arc surface since described first gathers the blade in portion and in the arc surface and
Face in second groove between edge.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is the technology schematic diagram for habit.
Fig. 2 is the front schematic view of first embodiment of the invention.
Fig. 3 is the side schematic view of first embodiment of the invention.
Fig. 4 is the face A-A shown in Fig. 2 sectional view.
Fig. 5 is the face C-C shown in Fig. 2 sectional view.
Fig. 6 is the schematic diagram of second embodiment of the invention.
Fig. 7 is the schematic diagram of third embodiment of the invention.
Fig. 8 is the schematic diagram of four embodiment of the invention.
Specific embodiment
As shown in Fig. 2, chit drill of the invention includes a shank 1, and it is formed in the flat knife portion 2 of shank forward, flat knife portion
Thin and thick it is uniform, the front in flat knife portion extends internally respectively from both sides, forms two shoulders, the first shoulder 21 and the second shoulder
Portion 22, two shoulders continue inwardly to collapse upwards and extend, are respectively formed two and gather portion, first, which gathers portion 23 and second, gathers portion
24, and a pinnacle 25 is formed at top.The first shoulder blade to the inside in flat knife portion formed the first groove, described first
The inward flange of groove diagonally downward, forms the angle greater than 0 degree with the horizontal horizontal line of chit drill to the first shoulder lateral direction.Institute
It states the blade that first gathers portion and forms the second groove to the inside in the flat knife portion.
Flat knife portion has front 26 and reverse side 27, and first shoulder 21 in front 26 and first gather portion 23 and be respectively formed first
The blade of shoulder and first gather portion blade, the second shoulder 22 of reverse side 27 and second gathers portion 24 and is distributed and form the of reverse side
The blade of two shoulders and second gather portion blade.So the feature of the obverse and reverse in flat knife portion is big in terms of obverse and reverse
It causes identical.There are two substantially parallel the first sides 28 and the second side 29 for the flat tool of knife portion 2.It is illustrated below from front.
In terms of front, as shown in Fig. 2, gathering the blade in portion to formed inside flat knife portion from the first of positive side
Two grooves 231, the interior edge 232 of the second groove with first gather portion blade it is substantially parallel, the first shoulder from positive side
Blade to forming the first groove 211 inside flat knife portion, the interior edge 212 of the first groove towards flat knife portion positive first
On the direction of the side 28 of shoulder side diagonally downward, the angle greater than 0 degree is formed with the horizontal horizontal line in flat knife portion 2.First groove
It is communicated with the second groove.Horizontal horizontal line is line (virtual) substantially vertical with side 28 or 29 or puts down on the shank bottom edge of upper view
Capable horizontal line.
In this embodiment, the first shoulder 21 and the second shoulder 22 are big respectively from the first side 28 and the second side 29
Perpendicularly inward extension is caused, so shoulder is parallel with the horizontal horizontal line or is overlapped, so as shown in Fig. 2, the inner edge of the second groove
Portion 212 and shoulder form the angle greater than 0 degree, have in Fig. 2 and show 30 degree, and in Fig. 6, what is specifically illustrated is 60
Degree.Since angle will cause more greatly not big enough the problem of blade intensity, and angle too small improves less speed, so preferably
Angle is 0-60 degree, and more excellent is 0-30 degree, also may be greater than 2 degree of angle, optimal is 15-30 degree.
The effect of first and second groove mainly can more easily export wood chip after blade cuts wood chip,
It is unlikely to blocking drilling.However it is also from undiscovered that the shape of the interior edge of the first groove, which can impact the speed of drilling,
The problem of.It extends obliquely downward the first groove to the side direction of blade side, makes the interior edge of the first groove and the horizontal line
The angle greater than 0 degree is generated, so that the speed for making drilling is faster one of great discovery of the invention.
Two sides of flat 2 front of knife portion, the corner of the first side and the second side, i.e. two shoulders, the first shoulder and
Second shoulder two sides can also have the spine 213 and 223 stretched out upwards as shown in Figure 2.The design of spine can be such that chit drill bores
The smooth hole of neat in edge out.
Selectively, as shown in fig. 7, the first shoulder 21' and the second shoulder 22' can also be from the two sides of flat 2 front of knife portion
It is inwardly angled to extend downwardly, form radial shoulder outward.Such shoulder design is conducive to preferably cut.
Selectively, as shown in figure 8, the two sides of two shoulders of flat 2 front of knife portion can also have the corner scabbled
213' and 223'.Product clast can be reduced in drilling in this way, thus guarantee the quality and tidiness in the hole after boring, it can be with
Reduce the energy loss of drilling and the accumulation of clast.
The tail portion of shank forms hexagon interconnecting piece 11, can be connected with electric or hand tool, so that chit drill be made to need
Rotation in the substance to be drilled, to achieve the purpose that drilling.Also there is a ring-shaped depression 12 on hexagon interconnecting piece, it can be with
Match use with drill bit currently on the market.
The front 26 that can be seen that flat knife portion such as the side view of Fig. 3 and reverse side 27 are opposite with the position of shank junction
It is inclined inclined-plane for axis, there is certain angle between obverse and reverse, in example shown in figure, specially
13°。
First groove, 211 to the second groove, 231 depth is deep, so in the connection of the second groove 231 and the first groove 211
Place forms a step, wherein the second groove is higher than the first groove.
As can be seen from Figure 4 in Fig. 2 the face A-A sectional view, show the cross-section structure of the first groove.It can from figure
Out, the first groove is a smooth concave surface, facilitates the export of sawdust, increases the speed of drilling, and reduces energy consumption.Such as figure
Shown in, it can be certain that the smooth concave surface of the first groove, which includes the first cambered surface 2111 since the blade of shoulder, in figure
The circular arc of radius, and to the second cambered surface 2112 of edge in the first groove, cambered surface that can be different from the first cambered surface with radius.Also
It may include connecting the straight third face 2113 of the first cambered surface and the second cambered surface, third face can also have between two cambered surfaces
There is certain radian.
As can be seen from Figure 5 in Fig. 2 the face C-C sectional view, show the cross-section structure of the second groove.Second groove
It can be a smooth concave surface.It can be seen from the chart, the second groove is an arc surface since first gathers the blade in portion
And in the face 2311 in arc surface and the second groove between edge 232, wherein face 2311 can be plane as shown in Figure 5,
It can be arc surface.
Following table is contrast test report, is tested as hardwood material, tests pressure at 18 pounds, test depth is 40mm revolving speed
It is 680, and every kind of sample all continuously punches 5 on wood.Wherein interior edge and horizontal horizontal line of the angle for the first groove
Between angle.It can be seen that No. 1 sample is the sample of the technology of habit, 2-5 sample is different embodiments of the invention.It can be with
Find out that No. 5 sample punching average speeds are most fast.
1-3 sample chip removal is all slice shape.4-5 sample chip removal has the phenomenon that continuously rolling, and it is unfavorable easily to block
Chip removal.1-3 sample: angle is smaller, and cutting edge distance is shorter, and the intensity of cutting edge is preferable, and when cutting has enough intensity to be not easy
Distortion.4-5 sample: angle is larger, and cutting edge distance is longer, and the side of cutting edge is partially thin, and intensity is inadequate when cutting, easily distortion sword
Mouthful, thus easily there is safety accident, and cutting edge pushes area and is unfavorable for processing greatly, so suggesting batch production angle in 15-
Between 30 degree.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (11)
1. a kind of chit drill, which is characterized in that including shank, and it is formed in the flat knife portion of the shank forward, the flat knife portion
Front extends internally respectively from both sides, forms two shoulders, the first shoulder and the second shoulder, and described two shoulders continue inside
It collapses and extends upwards, be respectively formed two and gather portion, first gathers portion and second gathers portion, and forms a pinnacle at top,
The first groove is formed to the inside in flat knife portion in the blade of first shoulder, and the inward flange of first groove is to described first
Diagonally downward, the inward flange of first groove and the horizontal horizontal line of the chit drill form and are more than or equal to 15 degree shoulder lateral direction
And the angle less than or equal to 30 degree；The second groove is formed to the inside in the flat knife portion in the blade that described first gathers portion；
First groove is deeper than second depth of groove；First groove be a smooth concave surface, described first
The smooth concave surface of groove includes the first cambered surface since the blade of shoulder, and to the second cambered surface of edge in the first groove,
And the straight third face of connection first cambered surface and the second cambered surface；
Second groove is arc surface since described first gathers the blade in portion and in the arc surface and described
Plane in second groove between edge；
The flat knife portion has obverse and reverse, and the obverse and reverse in the flat knife portion is in the position phase with the shank junction
It is inclined inclined-plane for axis, there is 13 ° of angle between obverse and reverse.
2. chit drill as described in claim 1, which is characterized in that positive first shoulder in flat knife portion and described first gathers
Hold together the blade that portion is respectively formed the blade of positive first shoulder and first gathers portion, second shoulder of reverse side and described
Two bunched portions not Xing Cheng reverse side the second shoulder blade and second gather portion blade.
3. chit drill as claimed in claim 2, which is characterized in that the flat knife portion tool there are two the first substantially parallel side and
Second side.
4. chit drill as claimed in claim 3, which is characterized in that the feature of the obverse and reverse in the flat knife portion is identical.
5. chit drill as claimed in claim 4, which is characterized in that the interior edge of second groove and described first gathers portion
Blade is substantially parallel.
6. chit drill as claimed in claim 5, which is characterized in that the horizontal horizontal line be substantially with first side or described
The vertical line in second side, or be the horizontal line parallel with the upper view shank bottom edge.
7. chit drill as described in claim 1, which is characterized in that first shoulder and the second shoulder are respectively from first side
Portion and second side is substantially vertical extends internally.
8. chit drill as described in claim 1, which is characterized in that first shoulder and the second shoulder are from the flat knife portion front
Two sides it is inwardly angled extend downwardly, formed two outside radial shoulders.
9. chit drill as described in claim 1, which is characterized in that two sides of the flat knife portion front, the first side and
The corner of two sides all has the spine stretched out upwards.
10. chit drill as described in claim 1, which is characterized in that the two sides of two shoulders of the flat knife portion front, which have, cuts
Flat corner.
11. chit drill as described in claim 1, which is characterized in that the tail portion formation hexagon interconnecting piece of the shank, described six
Also there is a ring-shaped depression in Angle connection portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032765.3A CN104802245B (en) | 2014-01-23 | 2014-01-23 | Chit drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032765.3A CN104802245B (en) | 2014-01-23 | 2014-01-23 | Chit drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104802245A CN104802245A (en) | 2015-07-29 |
| CN104802245B true CN104802245B (en) | 2019-07-09 |
Family
ID=53687636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410032765.3A Active CN104802245B (en) | 2014-01-23 | 2014-01-23 | Chit drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104802245B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE468708B (en) * | 1991-07-15 | 1993-03-08 | Sandvik Ab | FLAT DRILL |
| JPH10151604A (en) * | 1996-11-25 | 1998-06-09 | Kanefusa Corp | Woodworking boring drill |
| CN2500448Y (en) * | 2001-05-17 | 2002-07-17 | 王宇红 | Flat drill bit |
| CN2818112Y (en) * | 2005-08-08 | 2006-09-20 | 浙江万利工具集团有限公司 | Shovel-style drill of torsional arc end edge |
| GB2431368B (en) * | 2005-10-20 | 2010-03-03 | Irwin Ind Tool Co | Spade bit |
| CN200984763Y (en) * | 2006-12-22 | 2007-12-05 | 浙江万利工具集团有限公司 | V-shaped three-tip screw-end shovel-shaped drill |
| CN200998874Y (en) * | 2007-01-08 | 2008-01-02 | 宁波天工巨星工具有限公司 | Carpenter flat drill |
| CN102490213A (en) * | 2011-08-19 | 2012-06-13 | 郫县森木刃具厂 | Four-groove gang drill |
| CN203680452U (en) * | 2014-01-23 | 2014-07-02 | 杭州巨星工具有限公司 | Flat bit |
-
2014
- 2014-01-23 CN CN201410032765.3A patent/CN104802245B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104802245A (en) | 2015-07-29 |
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