CN101288912A - Step drill with changeable head - Google Patents
Step drill with changeable head Download PDFInfo
- Publication number
- CN101288912A CN101288912A CNA2008101239033A CN200810123903A CN101288912A CN 101288912 A CN101288912 A CN 101288912A CN A2008101239033 A CNA2008101239033 A CN A2008101239033A CN 200810123903 A CN200810123903 A CN 200810123903A CN 101288912 A CN101288912 A CN 101288912A
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Abstract
A variable-head step drill pertains to a drilling tool in the technical field of mechanical processing, which is used for hole processing of thin metal sheets, plastics and wooden plates. As the service life of a small-diameter step blade on the front end part of the existing step drill ends, the whole drill is discarded, but actually the large-diameter step blade in the rear part is far away from the extent of being discarded, thus causing the waste of financial power and resources. The variable-head step drill of the invention is composed of a parent blade part and a subsidiary blade part, and is characterized in that a drill handle on the subsidiary blade part is provided with at least a radial blind hole; the bottom of the hole is provided with a press spring and the upper opening of the hole is provided with an embedded bead which is corresponding to the upper opening; the center of the front end of the drill on the parent blade part is provided with an inner axial hole matched with the drill handle; the inner cavity is provided with a limit arc slot matched with the embedded bead. The design of the invention ensures the tight and stable combination of the parent blade part and the subsidiary blade part, and also facilitates the replacement of the drill on the subsidiary blade part, thus saving the precious tool steel resources for the society and also greatly reducing the use cost for the user.
Description
Technical field:
Belong to the drilling tool in the Machining Technology field, particularly a kind of metal foil metal plate that is used for, plastics, wooden boards carry out the step drill with changeable head of hole processing.
Background technology:
Step drill is a kind of same combination tool that the drill bit one-pass is processed different from small to large apertures circular hole that uses.The actual result that uses shows that in use the minor diameter ladder sword of its chisel edge portion is the most easy to wear, and has largely determined whole the service life of the minor diameter ladder sword of its leading section just in the service life of step drill.Existing step drill can only finish because of the service life of the minor diameter ladder sword of its leading section with whole step drill to be done to scrap processing, the major diameter ladder sword at its rear portion arrives the degree that wearing and tearing are scrapped in fact far away, and this has just caused the wasting of resources of valuable tool steel and the rising of use cost.This shows,, design a kind of necessity that economizes on resources and improve the step drill with changeable head of working (machining) efficiency, reduction use cost in the today of advocating resource-conserving development energetically.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, design a kind of step drill with changeable head that economizes on resources and improve working (machining) efficiency, reduction use cost.
The object of the present invention is achieved like this: a kind of step drill with changeable head is combined by female blade and sub-blade:
Female blade includes female drillstock, keeps the concentric female drill body that is solidified as a whole circularly with female drillstock, and female drill body outer rim is provided with at least 2 grades of ladder swords that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with at least 1 chip area that connects ladder swords at different levels vertically; Sub-blade includes bit sub, keeps the concentric bit body that is solidified as a whole circularly with bit sub, and the bit body outer rim is provided with at least 1 grade of ladder sword that is the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with at least 1 chip area that connects ladder swords at different levels vertically;
It is characterized in that cross sectional shape is on the non-circular bit sub design at least 1 radial blind holes is arranged, the radial blind holes bottom is provided with stage clip, the radial blind holes seed pearl that cooperates with stage clip that is provided with suitable for reading; The spacing arc groove of the shape of chase ringwise that the center design of female drill body front end has the axial bore that cooperates with the bit sub cross sectional shape, axial bore inner chamber to be provided with to cooperate with seed pearl.
Described cross sectional shape is the non-circular cross sectional shape that is in the non-circular bit sub, is meant equilateral triangle or comprises square rectangle or positive pentagon or regular hexagon.Described female drill body front end center design has the axial bore that cooperates with the bit sub cross sectional shape, and the degree of depth of cross sectional shape that wherein cooperates the cross section that is meant axial bore and bit sub and big or small identical, axial bore is identical with the length of bit sub.Such design has guaranteed the combination of female blade and sub-blade closely, and the step drill that is combined into after the integral body has the processing moment of torsion that is equivalent to common whole step drill, guarantees to reach due drilling effect.
Described axial bore inner chamber is provided with the spacing arc groove of the shape of chase ringwise that cooperates with seed pearl, and indication cooperates, and to be seed pearl identical apart from the length of length bottom spacing arc slot pitch axial bore of bit sub rear end, the chase radian of the sphere radian of seed pearl and spacing arc groove is identical.Such design had both guaranteed that female blade is tight and stable cooperating axially with being combined in of sub-blade, can change sub-blade drill bit again quickly and easily.
The described chip area that connects ladder swords at different levels vertically is designed to the helicla flute that two curved surfaces that become straight trough that two planes of 65-85 degree form or angle to become the 20-60 degree by angle are vertically formed.The described chip area that connects ladder swords at different levels vertically, be designed to also vertically that external diameter with the ladder sword increases step by step and its well width also correspondingly increases to radially step by step, and female blade is connected one into strips mutually with the chip area of step drill after sub-blade is combined into integral body.Such design has guaranteed still can adapt to smoothly after female blade and sub-blade make up the chip removal needs under the various processing conditions.
The step drill with changeable head that the invention process obtains has shown following advantage through trying out:
1, saved valuable tool steel resource significantly.As long as degree is scrapped in the drilling sword no show wearing and tearing of the female blade of step drill, all only need to change its sub-blade, promptly anterior minor diameter drill bit.The border measuring and calculating obtains factually, the consumptive material of anterior minor diameter drill bit only accounts for whole the 10-30% of step drill after the combination, thereby avoided consumptive material to reach the female blade of rear portion major diameter of 70-90%, as existing common step drill, scrapped and have to scrap thereupon because of the wearing and tearing of its anterior small-bore drilling sword.This has not only saved valuable tool steel resource significantly for society, has also reduced acquisition cost significantly for the user.
2, improve working (machining) efficiency, reduction use cost.Though hole processing is a kind of very common processing, owing to can't see working position, thereby it is again a kind of relatively processing operation of difficulty.The centering degree of accuracy in order to guarantee to hole, spend more man-hour often, and the step drill with changeable head that the invention process obtains, only need add expense centering in man-hour collating time first, when existing common step drill such, because the wearing and tearing of its anterior minor diameter drilling sword are scrapped, have to change whole step drill being expended once more when feeling relieved collating time, the step drill with changeable head that the invention process obtains only need be changed the time of less relatively its sub-blade of replacing of expense.Border measuring and calculating factually, centering collating time be on average at 60 seconds, and the time average of changing its sub-blade is at 10 seconds, thereby improved working (machining) efficiency, reduced processing cost shortening on process time significantly; Add the decline of acquisition cost as previously mentioned, reduced user's use cost from two aspects.
Description of drawings:
Fig. 1 is the schematic diagram that meets thematic structure of the present invention, and Fig. 2 is the schematic diagram after female blade of the present invention and sub-blade are combined into integral body.
The specific embodiment:
Below in conjunction with accompanying drawing implementation detail of the present invention is described as follows:
As shown in Figure 1, a kind of step drill with changeable head, combined by female blade (1) and sub-blade (2): female blade includes female drillstock (13), keep the concentric female drill body (3) that is solidified as a whole circularly with female drillstock, female drill body outer rim is provided with at least 2 grades of ladder swords (4) that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with at least 1 chip area (5) that connects ladder swords at different levels vertically; Sub-blade includes bit sub (8), keep the concentric bit body that is solidified as a whole circularly (9) with bit sub, the bit body outer rim is provided with at least 1 grade of ladder sword (4) that is the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with at least 1 chip area (5) that connects ladder swords at different levels vertically; It is characterized in that cross sectional shape is the last design of non-circular bit sub (8) at least 1 radial blind holes (10) is arranged, the radial blind holes bottom is provided with stage clip (11), the radial blind holes seed pearl (12) that cooperates with stage clip that is provided with suitable for reading; The design of female drill body (3) front end center has the axial bore (6) that cooperates with the bit sub cross sectional shape, and the axial bore inner chamber is provided with the spacing arc groove (7) of the shape of chase ringwise that cooperates with seed pearl.
Described cross sectional shape is the non-circular cross sectional shape that is in the non-circular bit sub (8), is meant equilateral triangle or comprises square rectangle or positive pentagon or regular hexagon.
The degree of depth of cross sectional shape that described female drill body (3) front end center design has cross section that the axial bore (6) that cooperates with bit sub (8) cross sectional shape, described cooperation be meant axial bore and a bit sub and big or small identical, axial bore is identical with the length of bit sub.
Described axial bore (6) inner chamber is provided with the spacing arc groove (7) of the shape of chase ringwise that cooperates with seed pearl (12), wherein cooperate be meant that seed pearl is identical apart from the length of length bottom spacing arc slot pitch axial bore of bit sub rear end, the chase radian of the sphere radian of seed pearl and spacing arc groove is identical.
As shown in Figure 2, the described chip area (5) that connects ladder swords at different levels vertically is designed to the helicla flute that two curved surfaces that become straight trough that two planes of 65-85 degree form or angle to become the 20-60 degree by angle are vertically formed.The described chip area (5) that connects ladder swords at different levels vertically, be designed to also vertically that external diameter with ladder sword (4) increases step by step and its well width also correspondingly increases to radially step by step, and female blade (1) is connected one into strips mutually with the chip area (5) of whole step drill after sub-blade (2) is combined into.
As one of embodiment, the sub-blade shown in Fig. 1 is formed the ladder sword for having 4 grades of drilling swords, and the cross section of bit sub is a regular hexagon, and bit sub is provided with the stage clip in 1 radial bore and the hole, the seed pearl in aperture; Female blade of Pei Heing is that 8 grades of drilling swords are formed the ladder sword with it, and the cross section of the axial bore at leading section center is a regular hexagon; As shown in Figure 2, the whole step drill with changeable head after the combination has 12 grades of drilling swords and forms the ladder sword, is provided with the radial chip removal straight trough that links into an integrated entity that 3 angles are the two planes composition of 70 degree.
Select the ladder sword of different progression, the different cross section shape be non-circular bit sub, bar is counted the chip area that two different planes of difference, angle or curved surface constitute and is made up, the present invention can have numerous different embodiment.
In concrete the enforcement except that stage clip, seed pearl can be from choose in market, the enforcement of parts is then adopted conventional car, is milled in addition, metal working process such as mill carries out for all the other.
The step drill with changeable head that the invention process obtains is mainly used in the metal foil metal plate, boring, reaming, spot-facing in plastics, the processing of wooden boards hole.
Claims (6)
1, a kind of step drill with changeable head is combined by female blade (1) and sub-blade (2):
---female blade includes female drillstock (13), keep the concentric female drill body (3) that is solidified as a whole circularly with female drillstock, female drill body outer rim is provided with at least 2 grades of ladder swords (4) that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with at least 1 chip area (5) that connects ladder swords at different levels vertically;
---sub-blade includes bit sub (8), keep the concentric bit body that is solidified as a whole circularly (9) with bit sub, the bit body outer rim is provided with at least 1 grade of ladder sword (4) that is the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with at least 1 chip area (5) that connects ladder swords at different levels vertically;
It is characterized in that cross sectional shape is the last design of non-circular bit sub (8) at least 1 radial blind holes (10) is arranged, the radial blind holes bottom is provided with stage clip (11), the radial blind holes seed pearl (12) that cooperates with stage clip that is provided with suitable for reading; The design of female drill body (3) front end center has the axial bore (6) that cooperates with the bit sub cross sectional shape, and the axial bore inner chamber is provided with the spacing arc groove (7) of the shape of chase ringwise that cooperates with seed pearl.
2. by the step drill with changeable head of claim 1 regulation, it is characterized in that described cross sectional shape is the non-circular cross sectional shape that is in the non-circular bit sub (8), be meant equilateral triangle or comprise square rectangle or positive pentagon or regular hexagon.
3. press the step drill with changeable head of claim 1 regulation, it is characterized in that described female drill body (3) front end center design has the axial bore (6) that cooperates with bit sub (8) cross sectional shape, the degree of depth of cross sectional shape that wherein cooperates the cross section that is meant axial bore and bit sub and big or small identical, axial bore is identical with the length of bit sub.
4. press the step drill with changeable head of claim 1 regulation, it is characterized in that described axial bore (6) inner chamber is provided with the spacing arc groove (7) of the shape of chase ringwise that cooperates with seed pearl (12), wherein cooperate be meant that seed pearl is identical apart from the length of length bottom spacing arc slot pitch axial bore of bit sub rear end, the chase radian of the sphere radian of seed pearl and spacing arc groove is identical.
5, the step drill with changeable head of stipulating by claim 1, it is characterized in that the described chip area (5) that connects ladder swords at different levels vertically, be designed to the helicla flute that two curved surfaces that become straight trough that two planes of 65-85 degree form or angle to become the 20-60 degree by angle are vertically formed.
6, by claim 1 or 5 step drill with changeable head of stipulating, it is characterized in that the described chip area (5) that connects ladder swords at different levels vertically, be designed to also vertically that external diameter with ladder sword (4) increases step by step and its well width also correspondingly increases to radially step by step, and the chip area (5) of the whole step drill that is combined into of female blade (1) and sub-blade (2) is connected one into strips mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101239033A CN101288912A (en) | 2008-06-12 | 2008-06-12 | Step drill with changeable head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101239033A CN101288912A (en) | 2008-06-12 | 2008-06-12 | Step drill with changeable head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101288912A true CN101288912A (en) | 2008-10-22 |
Family
ID=40033452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101239033A Pending CN101288912A (en) | 2008-06-12 | 2008-06-12 | Step drill with changeable head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101288912A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195800A (en) * | 2013-04-15 | 2013-07-10 | 宁波三泰轴承有限公司 | Positioning ball bearing |
| CN104107937A (en) * | 2013-04-19 | 2014-10-22 | 苏州文鼎模具有限公司 | Stepped drill with replaceable drilling edges |
| CN104174887A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | High-precision molding chamfering tool |
| CN104174886A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Molding chamfering tool |
| CN106985219A (en) * | 2017-04-12 | 2017-07-28 | 重庆市永川区植成家俱厂 | A kind of plate drilling device of drill bit reducing |
| US9731358B2 (en) | 2013-06-06 | 2017-08-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| CN107262786A (en) * | 2017-08-10 | 2017-10-20 | 扬州市实力五金工具工贸有限公司 | A kind of band stops section step drill and its manufacture method |
| CN107433353A (en) * | 2017-09-14 | 2017-12-05 | 张家港钻通设备有限公司 | A kind of combined drill device with multistage drill bit |
| CN107498095A (en) * | 2017-09-20 | 2017-12-22 | 江苏天工工具有限公司 | A kind of left-handed three swords milling is bored |
| CN107511512A (en) * | 2017-09-20 | 2017-12-26 | 江苏天工工具有限公司 | A kind of right rotation three-wing bit |
| CN108436153A (en) * | 2018-05-14 | 2018-08-24 | 东台升华工具有限公司 | A kind of three bone knob of multi-step taper brill |
| CN113270840A (en) * | 2021-06-10 | 2021-08-17 | 国网河南省电力公司唐河县供电公司 | Cable deicing device |
| US11273501B2 (en) | 2018-04-26 | 2022-03-15 | Milwaukee Electric Tool Corporation | Step drill bit |
-
2008
- 2008-06-12 CN CNA2008101239033A patent/CN101288912A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195800A (en) * | 2013-04-15 | 2013-07-10 | 宁波三泰轴承有限公司 | Positioning ball bearing |
| CN103195800B (en) * | 2013-04-15 | 2015-06-03 | 宁波三泰轴承有限公司 | Positioning ball bearing |
| CN104107937A (en) * | 2013-04-19 | 2014-10-22 | 苏州文鼎模具有限公司 | Stepped drill with replaceable drilling edges |
| CN104174887A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | High-precision molding chamfering tool |
| CN104174886A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Molding chamfering tool |
| USD936117S1 (en) | 2013-06-06 | 2021-11-16 | Milwaukee Electric Tool Corporation | Step drill bit |
| US9731358B2 (en) | 2013-06-06 | 2017-08-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| US10695845B2 (en) | 2013-06-06 | 2020-06-30 | Milwaukee Electric Tool Corporation | Step drill bit |
| US10252351B2 (en) | 2013-06-06 | 2019-04-09 | Milwaukee Electric Tool Corporation | Step drill bit |
| CN106985219B (en) * | 2017-04-12 | 2019-02-19 | 重庆市永川区植成家俱厂 | A kind of plate drilling device of drill bit reducing |
| CN106985219A (en) * | 2017-04-12 | 2017-07-28 | 重庆市永川区植成家俱厂 | A kind of plate drilling device of drill bit reducing |
| CN107262786A (en) * | 2017-08-10 | 2017-10-20 | 扬州市实力五金工具工贸有限公司 | A kind of band stops section step drill and its manufacture method |
| CN107433353A (en) * | 2017-09-14 | 2017-12-05 | 张家港钻通设备有限公司 | A kind of combined drill device with multistage drill bit |
| CN107511512A (en) * | 2017-09-20 | 2017-12-26 | 江苏天工工具有限公司 | A kind of right rotation three-wing bit |
| CN107498095A (en) * | 2017-09-20 | 2017-12-22 | 江苏天工工具有限公司 | A kind of left-handed three swords milling is bored |
| US11273501B2 (en) | 2018-04-26 | 2022-03-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| US11691203B2 (en) | 2018-04-26 | 2023-07-04 | Milwaukee Electric Tool Corporation | Step drill bit |
| CN108436153A (en) * | 2018-05-14 | 2018-08-24 | 东台升华工具有限公司 | A kind of three bone knob of multi-step taper brill |
| CN113270840A (en) * | 2021-06-10 | 2021-08-17 | 国网河南省电力公司唐河县供电公司 | Cable deicing device |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081022 |