CN201151004Y - Step drill with changeable head - Google Patents
Step drill with changeable head Download PDFInfo
- Publication number
- CN201151004Y CN201151004Y CNU2007200419595U CN200720041959U CN201151004Y CN 201151004 Y CN201151004 Y CN 201151004Y CN U2007200419595 U CNU2007200419595 U CN U2007200419595U CN 200720041959 U CN200720041959 U CN 200720041959U CN 201151004 Y CN201151004 Y CN 201151004Y
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- drill
- female
- cooperates
- axial bore
- sub
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- Expired - Lifetime
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Abstract
The utility model relates to a step drill whose head can be changed, which belongs to the drilling tools in the technical field of mechanical processing, and is used for processing holes on a thin metal plate, plastic and wood sheet materials. The existing step drill is out of use when the service span of a small-diameter step edge on the front end portion is finished, and a big-diameter step edge on the rear portion actually does not reach the degree of abrading and abandoning, and the waste of financial ability and resources is caused. The step drill whose head can be changed is combined by a primary edge portion and a secondary edge portion, which is characterized in that at least a radial blind hole is arranged on a drill head handle on the secondary edge portion, and the bottom of the blind hole is provided with a compression spring, and the upper hole of the blind hole is provided with an embedded ball which is matched with the blind hole, the center on the front end of the drilling body of the primary edge portion is provided with an axial inner hole which is matched with the drill head handle, and the inner cavity of the primary edge portion is provided with a limited arc groove which is matched with the embedded ball. The step drill whose head can be changed not only guarantees the tight and stable combination between the primary edge portion and the secondary edge portion, but also the drill head on the secondary edge portion is conveniently and swiftly changed, thereby saving precious tool steel resources, and greatly reducing use cost for users.
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.As everyone knows, in use the small-bore ladder sword of its chisel edge portion is the most easy to wear, and has largely determined whole the service life of the small-bore 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 small-bore ladder sword of its leading section with whole step drill to be done to scrap processing, the heavy caliber ladder sword at its rear portion arrives the wearing and tearing degree of scrapping in fact far away, and this has just caused the wasting of resources of financial resources and valuable tool steel.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 purpose of this utility model is at the deficiencies in the prior art, designs a kind of step drill with changeable head that economizes on resources and improve working (machining) efficiency, reduction use cost.
The purpose of this utility model is achieved in that a kind of step drill with changeable head, combined by female blade and sub-blade: female blade includes female drillstock, keep the concentric female drill body 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 that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with the chip area that the 2-4 bar 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 2 grades of ladder swords that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with the chip area that the 2-4 bar connects ladder swords at different levels vertically; It is characterized in that design has at least 1 radial blind holes on the bit sub, 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 front end center design of female drill body has with cross sectional shape and is the axial bore that non-circular bit sub cooperates, and the axial bore inner chamber is provided with the spacing arc groove of the shape of chase ringwise that cooperates with seed pearl.
Described female drill body front end center design has with cross sectional shape and is the axial bore that non-circular bit sub cooperates, and it is that the length of the degree of depth of the shape in cross section and the cross section of bit sub of axial bore and big or small identical, axial bore and bit sub is identical that indication cooperates.It is equilateral triangle or the rectangle that comprises square or positive pentagon or regular hexagon that indication is non-circular cross sectional shape.This design has guaranteed female blade and the combination of sub-blade closely, and the step drill after the integral body that is combined into 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.This 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.This 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 utility model enforcement obtains has shown following advantage through trying out: the resource of 1, having saved valuable tool steel 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 small-bore drill bit.The border measuring and calculating obtains factually, the consumptive material of anterior small-bore drill bit only accounts for whole the 10-30% of step drill after the combination, thereby avoided consumptive material to reach the female blade in large aperture, rear portion 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 use 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 utility model enforcement obtains, only need add expense centering in man-hour collating time first, when existing common step drill is scrapped because of the wearing and tearing of its anterior small-bore drilling sword like that, whole step drill is expended centering during collating time once more and have to change, the step drill with changeable head that the utility model implements to obtain 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 greatly; Add the decline of acquisition cost as mentioned above, reduced user's use cost from two aspects.
Description of drawings:
Fig. 1 is the schematic diagram that meets the utility model thematic structure, and Fig. 2 is the schematic diagram after female blade of the present utility model and sub-blade are combined into integral body.
The specific embodiment:
Below in conjunction with accompanying drawing implementation detail of the present utility model is described as follows:
As shown in Figure 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 the chip area (5) that the 2-4 bar 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 2 grades of ladder swords (4) that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with the chip area (5) that the 2-4 bar connects ladder swords at different levels vertically;
It is characterized in that the last design of bit sub (8) has at least 1 radial blind holes (10), 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; Female drill body (3) front end center is designed to have with cross sectional shape and is the axial bore (6) that non-circular bit sub cooperates, 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 (12).
Described female drill body (3) center design has with cross sectional shape and is the axial bore (6) that non-circular bit sub (8) cooperates, and the degree of depth of the cross section that described cooperation is meant axial bore and the cross sectional shape of bit sub and big or small identical, axial bore is identical with the length of bit sub.Described female drill body (3) front end center design has with cross sectional shape and is the axial bore (6) that non-circular bit sub (8) cooperates, describedly is non-circular cross sectional shape and is meant equilateral triangle or comprises the rectangle of square or just pentagon or regular hexagon.
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), and described cooperation is meant that seed pearl is identical apart from the length of the length of bit sub rear end and spacing arc slot pitch axial bore bottom, 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 also 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.
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 utility model is implemented to obtain 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 the chip area (5) that the 2-4 bar 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 2 grades of ladder swords (4) that are the drilling sword composition of multidiameter shape, cooperates the ladder sword to be provided with the chip area (5) that the 2-4 bar connects ladder swords at different levels vertically;
It is characterized in that the last design of bit sub (8) has at least 1 radial blind holes (10), 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; Female drill body (3) front end center is designed to have with cross sectional shape and is the axial bore (6) that non-circular bit sub cooperates, 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 (12).
2, the step drill with changeable head of stipulating by claim 1, it is characterized in that described female drill body (3) front end center design has with cross sectional shape is the axial bore (6) that non-circular bit sub (8) cooperates, and the degree of depth of the cross section that described cooperation is meant axial bore and the cross sectional shape of bit sub and big or small identical, axial bore is identical with the length of bit sub.
3, by claim 1 or 2 step drill with changeable head of stipulating, it is characterized in that described female drill body (3) front end center design has with cross sectional shape is the axial bore (6) that non-circular bit sub (8) cooperates, and the described non-circular cross sectional shape that is is meant equilateral triangle or comprises the rectangle of square or just pentagon or regular hexagon.
4, the step drill with changeable head of stipulating by claim 1, 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), described cooperation is meant that seed pearl is identical apart from the length of the length of bit sub rear end and spacing arc slot pitch axial bore bottom, 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 |
|---|---|---|---|
| CNU2007200419595U CN201151004Y (en) | 2007-12-03 | 2007-12-03 | Step drill with changeable head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200419595U CN201151004Y (en) | 2007-12-03 | 2007-12-03 | Step drill with changeable head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201151004Y true CN201151004Y (en) | 2008-11-19 |
Family
ID=40126687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200419595U Expired - Lifetime CN201151004Y (en) | 2007-12-03 | 2007-12-03 | Step drill with changeable head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201151004Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8388280B1 (en) * | 2007-10-04 | 2013-03-05 | Orlo Ison | Step drill bit |
| WO2014167049A1 (en) * | 2013-04-12 | 2014-10-16 | Hilti Aktiengesellschaft | Stepper |
| CN104190999A (en) * | 2014-08-01 | 2014-12-10 | 常州西利合金工具有限公司 | Reaming cutter |
| US9731358B2 (en) | 2013-06-06 | 2017-08-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| CN109184134A (en) * | 2018-10-30 | 2019-01-11 | 浙江水墨江南新材料科技有限公司 | Compound seed pearl floor |
| EP3434401A1 (en) * | 2017-07-27 | 2019-01-30 | Greenlee Textron Inc. | Step bit |
| US10328500B2 (en) | 2017-08-03 | 2019-06-25 | Greenlee Tools, Inc. | Cutting and deburring tool |
| US11273501B2 (en) | 2018-04-26 | 2022-03-15 | Milwaukee Electric Tool Corporation | Step drill bit |
-
2007
- 2007-12-03 CN CNU2007200419595U patent/CN201151004Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8388280B1 (en) * | 2007-10-04 | 2013-03-05 | Orlo Ison | Step drill bit |
| WO2014167049A1 (en) * | 2013-04-12 | 2014-10-16 | Hilti Aktiengesellschaft | Stepper |
| US10695845B2 (en) | 2013-06-06 | 2020-06-30 | Milwaukee Electric Tool Corporation | Step drill bit |
| US9731358B2 (en) | 2013-06-06 | 2017-08-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| US10252351B2 (en) | 2013-06-06 | 2019-04-09 | Milwaukee Electric Tool Corporation | Step drill bit |
| USD936117S1 (en) | 2013-06-06 | 2021-11-16 | Milwaukee Electric Tool Corporation | Step drill bit |
| CN104190999A (en) * | 2014-08-01 | 2014-12-10 | 常州西利合金工具有限公司 | Reaming cutter |
| EP3434401A1 (en) * | 2017-07-27 | 2019-01-30 | Greenlee Textron Inc. | Step bit |
| US10245656B2 (en) | 2017-07-27 | 2019-04-02 | Greenlee Tools, Inc. | Step bit |
| US10328500B2 (en) | 2017-08-03 | 2019-06-25 | Greenlee Tools, Inc. | Cutting and deburring tool |
| 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 |
| CN109184134A (en) * | 2018-10-30 | 2019-01-11 | 浙江水墨江南新材料科技有限公司 | Compound seed pearl floor |
| CN109184134B (en) * | 2018-10-30 | 2023-12-08 | 浙江水墨江南新材料科技有限公司 | Composite bead-embedded floor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081119 |