CN104802245A - Flat drill - Google Patents
Flat drill Download PDFInfo
- Publication number
- CN104802245A CN104802245A CN201410032765.3A CN201410032765A CN104802245A CN 104802245 A CN104802245 A CN 104802245A CN 201410032765 A CN201410032765 A CN 201410032765A CN 104802245 A CN104802245 A CN 104802245A
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- CN
- China
- Prior art keywords
- chit
- shoulder
- groove
- drills
- flat cutter
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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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses a flat drill. The flat drill is characterized by comprising a handle part and a flat knife part which is formed on the front part of the handle part, wherein the front part of the flat knife part extends inwards from two side parts respectively to form two shoulder parts, namely a first shoulder part and a second shoulder part; the two shoulder parts continuously fold and extend inwards and upwards to form two gathering parts respectively, namely a first gathering part and a second gathering part; a tip is formed on the top; a first groove is formed in an edge part of the first shoulder part towards the interior of the flat knife part; the inner edge of the first groove tilts downwards towards the outer side of the first shoulder part and forms an angle of greater than 0 degree with the horizontal transverse line of the flat drill.
Description
Technical field
The present invention relates to a kind of drill bit for holing, relating to a kind of chit drill or rather.
Background technology
Chit drill is generally the instrument of a kind of carpenter boring.The degree of depth of the easy control hole of this brill, so be namely applicable to bore more shallow hole, is also applicable to holes drilled through, so be widely used wood materials or other similar material.
As shown in Figure 1, usual chit drill comprises a shank 1, flat cutter portion 2 uniform with the thin and thick being formed in shank forward, the both sides of the front portion in flat cutter portion extend internally along horizontal crossline direction respectively, form a pair shoulder 21 and 22, shoulder continues to draw extension in obliquely, forms two respectively and gathers portion 23 and 24, and form a pinnacle 25 at top.From the main blade edge of shoulder, inwardly descend formation groove 211, the inward flange 212 of groove is parallel with the shoulder in flat cutter portion 2.The effect of groove after blade cuts wood chip, can be derived by wood chip.
Chit drill as shown in US Patent No. 5452970, two shoulder becomes radial and tilts upward.The main blade edge of shoulder starts inwardly to descend formation groove, and inward flange and the shoulder of groove are almost parallel, tilt upward equally.
In US Patent No. 7473056, be the example that a groove inward flange is parallel with the horizontal shoulders in flat cutter portion, a kind of shape of groove of this patent diselosesll, thus more easily can discharge wood chip faster when using chit drill boring, but those skilled in the art is not but further deeply familiar with this structure.
Summary of the invention
The object of this invention is to provide a kind of chit drill, the speed that chit drill can be made to hole is accelerated further.
For achieving the above object, the invention provides a kind of chit drill, it is characterized in that, comprise shank, with the flat cutter portion being formed in described shank forward, extending internally respectively from both sides of the front portion in described flat cutter portion, form two shoulders, first shoulder and the second shoulder, described two shoulders continue to draw extension in inwardly, form two respectively and gather portion, first gathers portion and second gathers portion, and a pinnacle is formed at top, the first groove is formed to the inside in flat cutter portion at the blade of described first shoulder, the inward flange of described first groove is tilted to down to described first shoulder lateral direction, the angle being greater than 0 degree is formed with the horizontal horizontal line of described chit drill.
The horizontal horizontal line of chit drill described in the inward flange of described first groove forms the angle being less than or equal to 60 degree.
The horizontal horizontal line of chit drill described in the inward flange of described first groove forms the angle being less than or equal to 30 degree.
The horizontal horizontal line of chit drill described in the inward flange of described first groove forms the angle being more than or equal to 2 degree.
The horizontal horizontal line of chit drill described in the inward flange of described first groove is formed and is more than or equal to 15 degree and the angle being less than or equal to 30 degree.
The second groove is formed to the inside in described flat cutter portion at the described first blade gathering portion.
Described flat cutter portion has obverse and reverse, the blade and first that described first shoulder in front and described first bunched portion do not form first shoulder in front gathers the blade in portion, and the blade and second that described second shoulder of reverse side and described second bunched portion do not form the second shoulder of reverse side gathers the blade in portion.
Described flat cutter portion has two almost parallel the first sidepieces and the second sidepiece.
The feature of the obverse and reverse in described flat cutter portion is identical.
The blade that the interior edge of described second groove and described first gathers portion is almost parallel.
Described horizontal horizontal line is roughly vertical with described first sidepiece or described second sidepiece line, or is the horizontal line parallel with above looking described handle base.
Described first shoulder and the second shoulder are respectively from described first sidepiece with described second sidepiece is substantially vertical extends internally.
Described first shoulder and the second shoulder are tilted to interior to downward-extension from the both sides of front portion, described flat cutter portion, form two outside radial shoulders.
Two sidepieces of front portion, described flat cutter portion, the corner of the first sidepiece and the second sidepiece all has the spine protruded upward.
The both sides of two shoulders of front portion, described flat cutter portion have the bight of scabbling.
The afterbody of described shank forms hexagon connecting portion, described hexagon connecting portion also has a ring-shaped depression.
The obverse and reverse in described flat cutter portion is the inclined-plane of inclination in the position with described handle junction relative to axis, has certain angle between obverse and reverse.
Described first groove is darker than described second depth of groove.
Described first groove is a level and smooth concave surface.
The level and smooth concave surface of described first groove comprises the first cambered surface from the blade of shoulder, and to the second cambered surface of edge in the first groove.
Describedly comprise straight 3rd that connects described first cambered surface and the second cambered surface.
Described second groove is one and gathers the arc surface the blade in portion and the face in described arc surface and described second groove between edge from described first.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
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 A-A face profile shown in Fig. 2.
Fig. 5 is the C-C face profile shown in Fig. 2.
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.
Detailed description of the invention
As shown in Figure 2, chit drill of the present invention comprises a shank 1, with the flat cutter portion 2 being formed in shank forward, the thin and thick in flat cutter portion is even, extending internally respectively from both sides of the front portion in flat cutter portion, form two shoulders, first shoulder 21 and the second shoulder 22, two shoulders continue to draw extension in inwardly, form two respectively and gather portion, first gathers portion 23 and second gathers portion 24, and forms a pinnacle 25 at top.Form the first groove at the blade of the first shoulder to the inside in flat cutter portion, the inward flange of described first groove is tilted to down to the first shoulder lateral direction, forms with the horizontal horizontal line of chit drill the angle being greater than 0 degree.The second groove is formed to the inside in described flat cutter portion at the described first blade gathering portion.
Flat cutter portion has front 26 and reverse side 27, first shoulder 21 in front 26 and first gathers the blade that blade and first that portion 23 forms the first shoulder respectively gathers portion, and the second shoulder 22 of reverse side 27 and second is gathered the distribute blade and second of the second shoulder forming reverse side of portion 24 and gathered the blade in portion.So from obverse and reverse, the feature of the obverse and reverse in flat cutter portion is roughly the same.Flat cutter portion 2 has two the first almost parallel sidepiece 28 and the second sidepieces 29.Illustrate from front below.
From front, as shown in Figure 2, from the second groove 231 that the first blade gathering portion of the side in front is formed to inside, flat cutter portion, the blade that the interior edge 232 of the second groove and first gathers portion is almost parallel, the first groove 211 is formed to inside, flat cutter portion from the blade of the first shoulder of side, front, the interior edge 212 of the first groove, downward in the direction surface thereof of the sidepiece 28 of the first shoulder side in front towards flat cutter portion, forms with the horizontal horizontal line in flat cutter portion 2 angle being greater than 0 degree.First groove and the second groove communicate.Horizontal horizontal line is roughly vertical with sidepiece 28 or 29 line (virtual) or the horizontal line with on the upper handle base looked parallel.
In this specific embodiment, first shoulder 21 and the second shoulder 22 are from the first sidepiece 28 and the second sidepiece 29 is substantially vertical respectively extends internally, so shoulder is parallel with described horizontal horizontal line or overlap, so as shown in Figure 2, interior edge 212 and the shoulder of the second groove form the angle being greater than 0 degree, having what illustrate is in fig. 2 30 degree, and in figure 6, what specifically illustrate is 60 degree.Get over conference due to angle and cause the problem that blade insufficient strength is large, and angle too small improves speed little, so preferably angle is 0-60 degree, more excellent is 0-30 degree, also can be the angle being greater than 2 degree, and optimum is 15-30 degree.
Wood chip mainly after blade cuts wood chip, can be derived by the effect of described first and second grooves more easily, is unlikely to blocking boring.But the shape of the interior edge of the first groove can to impact be also from undiscovered problem to the speed of boring.Make the first groove be tilted to downward-extension to the side direction of blade side, make the interior edge of the first groove and described horizontal line produce the angle being greater than 0 degree, thus make the speed of boring be one of great discovery of the present invention sooner.
Two sidepieces of front portion, flat cutter portion 2, the corner of the first sidepiece and the second sidepiece, i.e. two shoulders, the first shoulder and the second shoulder both sides can also have the spine 213 and 223 protruded upward as shown in Figure 2.The design of spine can make chit drill get out the neatly level and smooth hole of outward flange.
Selectively, as shown in Figure 7, the first shoulder 21' and the second shoulder 22' also can be tilted to interior to downward-extension from the both sides of front portion, flat cutter portion 2, forms outside radial shoulder.Such shoulder is designed with and is beneficial to better cutting.
Selectively, as shown in Figure 8, the both sides of two shoulders of front portion, flat cutter portion 2 can also have bight 213' and 223' scabbled.Product chip can be reduced when holing like this, thus ensure quality and the tidiness in the hole after boring, the energy loss of boring and the accumulation of chip can also be reduced.
The afterbody of shank forms hexagon connecting portion 11, can be connected with electronic or hand-operated tools, thus chit drill is rotated in the material needing boring, thus reaches the object of boring.Hexagon connecting portion also has a ring-shaped depression 12, can match with drill bit in the market and use.
Side view as Fig. 3 can be found out, the front 26 in flat cutter portion and reverse side 27 are the inclined-plane of inclination in the position with handle junction relative to axis, have certain angle, in the example illustrated in the drawings, be specially 13 ° between obverse and reverse.
First groove 211 to the second groove 231 degree of depth is dark, so form a step in the junction of the second groove 231 and the first groove 211, wherein the second groove is higher than the first groove.
The profile in A-A face in Fig. 2, shows the cross-section structure of the first groove as can be seen from Figure 4.Upper as can be seen from figure, the first groove is a level and smooth concave surface, facilitates the derivation of wood chip, increases the speed of boring, and reduces energy ezpenditure.As shown in FIG., in figure, the level and smooth concave surface of the first groove comprises the first cambered surface 2111 from the blade of shoulder, and it can be the circular arc of certain radius, and to the second cambered surface 2112 of edge in the first groove, and it can the radius cambered surface different from the first cambered surface.Can also comprise between two cambered surfaces, the 3rd straight face, face the 2113, three connecting the first cambered surface and the second cambered surface also can have certain radian.
As can be seen from Figure 5 the profile in C-C face in Fig. 2, shows the cross-section structure of the second groove.Second groove also can be a level and smooth concave surface.Upper as can be seen from figure, the second groove is an arc surface 2311 from the first blade gathering portion and the face 2311 in arc surface 2311 and the second groove between edge 232, and wherein face 2311 can be plane as shown in Figure 5, also can be arc surface.
Following table is contrast test report, and test as hardwood material, test pressure is at 18 pounds, and MTD is 40mm rotating speed is 680, and often kind of all continuous punching 5 on wood of sample.Wherein angle is the angle between the interior edge of the first groove and horizontal horizontal line.Can find out that No. 1 sample is the sample of the technology of habit, 2-5 sample is different embodiments of the invention.Can find out that No. 5 sample punching average speeds are the fastest.
The chip removal of 1-3 sample is all slice shape.The chip removal of 4-5 sample has the phenomenon rolled continuously, the easily unfavorable chip removal of blocking.1-3 sample: angle is less, cutting edge distance is shorter, and the intensity of cutting edge is better, has the not easily distortion of enough intensity during cutting.4-5 sample: angle is comparatively large, cutting edge distance is longer, and the side of cutting edge is partially thin, insufficient strength during cutting, and easy distortion cutting edge, thus easily occurs security incident, and cutting edge presses down area and is unfavorable for greatly processing, so suggestion batch production angle is between 15-30 degree.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (22)
1. a chit drill, it is characterized in that, comprise shank, with the flat cutter portion being formed in described shank forward, the front portion in described flat cutter portion extends internally respectively from both sides, form two shoulders, first shoulder and the second shoulder, described two shoulders continue to draw extension in inwardly, form two respectively and gather portion, first gathers portion and second gathers portion, and a pinnacle is formed at top, the first groove is formed to the inside in flat cutter portion at the blade of described first shoulder, the inward flange of described first groove is tilted to down to described first shoulder lateral direction, the angle being greater than 0 degree is formed with the horizontal horizontal line of described chit drill.
2. chit drill as claimed in claim 1, is characterized in that, the horizontal horizontal line of chit drill described in the inward flange of described first groove forms the angle being less than or equal to 60 degree.
3. chit drill as claimed in claim 1, is characterized in that, the horizontal horizontal line of chit drill described in the inward flange of described first groove forms the angle being less than or equal to 30 degree.
4. chit drill as claimed in claim 1, is characterized in that, the horizontal horizontal line of chit drill described in the inward flange of described first groove forms the angle being more than or equal to 2 degree.
5. chit drill as claimed in claim 1, is characterized in that, the horizontal horizontal line of chit drill described in the inward flange of described first groove is formed and is more than or equal to 15 degree and the angle being less than or equal to 30 degree.
6. chit drill as claimed in claim 1, is characterized in that, forms the second groove at the described first blade gathering portion to the inside in described flat cutter portion.
7. chit drill as claimed in claim 6, it is characterized in that, described flat cutter portion has obverse and reverse, the blade and first that described first shoulder in front and described first bunched portion do not form first shoulder in front gathers the blade in portion, and the blade and second that described second shoulder of reverse side and described second bunched portion do not form the second shoulder of reverse side gathers the blade in portion.
8. chit drill as claimed in claim 7, is characterized in that, described flat cutter portion has two almost parallel the first sidepieces and the second sidepiece.
9. chit drill as claimed in claim 8, it is characterized in that, the feature of the obverse and reverse in described flat cutter portion is identical.
10. chit drill as claimed in claim 9, it is characterized in that, the blade that the interior edge of described second groove and described first gathers portion is almost parallel.
11. chit drills as claimed in claim 10, is characterized in that, described horizontal horizontal line is roughly vertical with described first sidepiece or described second sidepiece line, or are the horizontal line parallel with above looking described handle base.
12. chit drills as claimed in claim 1, is characterized in that, described first shoulder and the second shoulder are respectively from described first sidepiece with described second sidepiece is substantially vertical extends internally.
13. chit drills as claimed in claim 1, is characterized in that, described first shoulder and the second shoulder are tilted to interior to downward-extension from the both sides of front portion, described flat cutter portion, form two outside radial shoulders.
14. chit drills as claimed in claim 1, is characterized in that, two sidepieces of front portion, described flat cutter portion, the corner of the first sidepiece and the second sidepiece all has the spine protruded upward.
15. chit drills as claimed in claim 1, is characterized in that, the both sides of two shoulders of front portion, described flat cutter portion have the bight of scabbling.
16. chit drills as claimed in claim 1, is characterized in that, the afterbody of described shank forms hexagon connecting portion, described hexagon connecting portion also has a ring-shaped depression.
17. chit drills as claimed in claim 7, is characterized in that, the obverse and reverse in described flat cutter portion is the inclined-plane of inclination in the position with described handle junction relative to axis, has certain angle between obverse and reverse.
18. chit drills as claimed in claim 6, is characterized in that, described first groove is darker than described second depth of groove.
19. chit drills as claimed in claim 1, is characterized in that, described first groove is a level and smooth concave surface.
20. chit drills as claimed in claim 19, is characterized in that, the level and smooth concave surface of described first groove comprises the first cambered surface from the blade of shoulder, and to the second cambered surface of edge in the first groove.
21. chit drills as claimed in claim 20, is characterized in that, described in comprise straight 3rd that connects described first cambered surface and the second cambered surface.
22. chit drills as claimed in claim 6, is characterized in that, described second groove is one and gathers the arc surface the blade in portion and the face in described arc surface and described second groove between edge from described first.
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 true CN104802245A (en) | 2015-07-29 |
| CN104802245B CN104802245B (en) | 2019-07-09 |
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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) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5452970A (en) * | 1991-07-15 | 1995-09-26 | Sandvik Ab | Drill bit |
| 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 |
| GB2431368A (en) * | 2005-10-20 | 2007-04-25 | Irwin Ind Tool Co | Spade drill 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
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5452970A (en) * | 1991-07-15 | 1995-09-26 | Sandvik Ab | Drill bit |
| 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 |
| GB2431368A (en) * | 2005-10-20 | 2007-04-25 | Irwin Ind Tool Co | Spade drill 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104802245B (en) | 2019-07-09 |
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