CN1203841A - Hole-drilling tool with rectangular blade - Google Patents
Hole-drilling tool with rectangular blade Download PDFInfo
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- CN1203841A CN1203841A CN 98103254 CN98103254A CN1203841A CN 1203841 A CN1203841 A CN 1203841A CN 98103254 CN98103254 CN 98103254 CN 98103254 A CN98103254 A CN 98103254A CN 1203841 A CN1203841 A CN 1203841A
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- 238000005553 drilling Methods 0.000 title abstract 7
- 238000005520 cutting process Methods 0.000 claims abstract description 110
- 230000017105 transposition Effects 0.000 claims description 125
- 239000002184 metal Substances 0.000 claims description 4
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
Disclosed is a hole-drilling tool 1 equipped with two rectangular indexing blades 11 and 12 with each having two short cutting edges 14 and 15 and two long cutting edges 16 and 17. If one indexing blade 11 is arranged next to a rotary shaft 24 of said hole-drilling tool 1, the other indexing blade 12 is disposed nearly to an excircle limited by said hole-drilling tool 1. Two effective cutting edges 14 and 14' at the end surface of said hole-drilling tool are straight cutting edges and overlaps with each other according to apertures, which are constituted without bends and inflexions to enable the same blades 11 and 12 capable of being employed by hole-drilling tools with different diameters, wherein the overlapping rate must be alterable while the cutting ratio keeps basically unchanged. Since the area surrounding indexing blade drilling holes is designed on the basis of a blade with a minimal size, a smaller minimum diameter than that before is capable of being utilized. The indexing blade with a simple and perspicuous stress direction and condition and a simple installation structure is simple and capable of being utilized with a very wide diameter range. Inner cutting edges always contact an object to be cut with its whole length.
Description
Theme of the present invention is a kind of boring bar tool and such boring bar tool of a cover with claim 1 preamble feature.
A kind of boring bar tool that is equipped with transposition blade for example discloses in EP0750960A1.This boring bar tool has a drill bit, and this drill bit one end has one and uses it for the shank that is fixed on the respective bush, is provided with two blade bearings on its other end.Two transposition blades that roughly become rectangle are housed on described blade bearing, and four cutting edges of blade are designed to identical shaped.With a face cutting edge cutting hole wall, blade concavity bending slightly is so it only contacts with hole wall by a point of a knife or a short sword section for clearly.
Two transposition blades in the boring bar tool end is stuck in the respective blade seat are overlapped at the boring bar tool end face.Particularly the cutting edge section that links to each other at the point of a knife place is carried out machining.Actual cutting ratio is to be determined by the overlapping degree in bit diameter and the transposition blade.In addition, if the drill bit radius is greater than the twice of transposition blade cutting edge length, then according to square transposition blade and fixed quantity must be greater than two transposition blades.
WO93/02824 discloses the boring bar tool of band transposition blade.This boring bar tool has the drill bit with two end face blade bearings.Basic configuration becomes the transposition blade of rectangle to be fixed on the described bar.Specifically, formed two short cutting edges of opposed recessed arch on transposition blade, described cutting edge protrudes point of a knife through the arch bending and changes same dished long sidewall into, and described sidewall is not as cutting edge.So determine the size of transposition blade according to bit diameter, the interior point of a knife of promptly radially outer transposition blade roughly is positioned at the cutting edge center of radially inner transposition blade.So machining mainly concentrates in each cutting edge district by point of a knife.On the contrary, make central sword section not bear load as far as possible.
DE4018043A1 discloses a kind of boring bar tool with triangular blade.Each cutting edge or become the arc convex or have corresponding flex point.When a plurality of cutting edges of the transposition blade that is in bit face are overlapping, a waveform or serrated edge have integrally been formed.Radially built-in rectangular blade is given prominence to its point of a knife with roughly being positioned at rotating shaft, and transposition blade cutting edge central authorities have approximately constituted axially the most forward point.This point is far away from rotating shaft.In addition, adopt same transposition blade in having the boring bar tool of different-diameter, this has caused transposition blade overlapping to some extent.Its cutting edge is because of its arc convex or the protruding folding shape geometry overlapping gradually contact workpiece along with the blade that always shortens, and this may cause uneven stress.
Blade is that body (blade designs for body) is determined according to drill bit in principle.In addition, designed different blades according to different tool diameters, dextrorotation instrument and left-handed instrument.This has obviously increased financial cost.
In addition, determine the transposition blade position in many boring bar tools, the result has produced radial load in working angles, and this power radially is offset tool body.This causes the aperture to enlarge, and aperture expansion and tool length, instrument revolution are relevant with cutting material.
Therefore, the purpose of this invention is to provide a kind of boring bar tool, it allows to use economically and can have good crudy.
In addition, the slim hole instrument should be able to be equipped with transposition blade.
In addition, boring bar tool can irrespectively prolong its service life with diameter.At last, under the situation of different bit diameters, use same transposition blade just passable.
This purpose is to realize by the boring bar tool with claim 1 feature.
Boring bar tool of the present invention has at least one but two transposition blade preferably, and they have four cutting edges.Opposed two cutting edges (one of them is effective work edge, and promptly it is installed on the bit face) are that straight sword does not promptly have bending and flex point fully.Effectively cutting edge is that weak point and/or long cutting edge by rectangular blade constitutes, and effective cutting edge is approximately perpendicular to drill bit length direction or its rotating shaft, but also described effective cutting edge can be set slight inclination.Long cutting edge preferably is that straight sword does not promptly have bending and flex point fully.Long straight cutting edge allows transposition blade can selectively be installed in length and breadth with the combination of short straight cutting edge, and another diameter region thus can overlap out.
If use two long cutting edges, diameter region and the overlapping biglyyer phenomenon of transposition blade size have then appearred.By constitute point-blank the overlap cut sword work as when in drill bit, correspondingly arranging effective cutting edge be installed in drill bit on two transposition blades lap irrespectively with bit diameter irrespectively realized two effective cutting edges on its total length with the contacting and help machining simultaneously of workpiece material.This has improved the life-span of boring bar tool.This measure is not only applicable to the rectangle transposition blade, and is applicable to the transposition blade of diamondwise slightly.
But transposition blade preferably becomes promptly grow up the respectively cutting edge of rectilinear cutting edge and short lines shape of rectangle to intersect 90 degree right angles.It is stable especially that such transposition blade is proved to be.It can improve and acts on the stressing conditions on the blade bearing and enlarge distance between drill bit point of a knife and screwed hole.Avoided the danger of drill bit fracture thus.Caused less surface pressing and improved the situation that unsymmetrical load distributes of bearing by axial long blade.
Rectangular blade not only allows to be provided on the dextrorotation boring bar tool, and can be provided on the left-handed boring bar tool, and these blades belong to kit.In addition, concerning many diameters and many tool types (left and right), use a kind of blade configuration and size just passable.
Transposition blade preferably fixes by a hold-down screw, and this screw passes transposition blade in the middle of a fixing hole.
Two transposition blades of a boring bar tool preferably are installed in the different radial positions.Transposition blade and boring bar tool cylindrical (cutting edge track) join and limit described cylindrical, and another transposition blade links to each other with rotating shaft.Cutting ratio and bit diameter are irrespectively basic identical.If the different drill bit of diameter is furnished with identical transposition blade, then according to the Duplication of different two transposition blades of diameter slight modification.
Two best positioned opposite of transposition blade of boring bar tool become 180 degree angles.Radially inner transposition blade specific diameter in the axial direction is forward to outer transposition blade.So the cutting force on the inner blade is greater than the cutting force on the outer transposition blade.Cutting force is to occur with the mode of the about vertically aligned radial load of cutting edge separately.After the radial load of interior transposition blade was dominant, the drill bit of boring bar tool was bearing obviously not too big power, and this power causes detachable bit just outwards to be offset very slightly and causes the aperture to enlarge simultaneously.In addition, significantly radial load causes the anti-stability of rocking of drill bit.If the drill bit rigidity is very high and caused skew is less, then that's how things stand.Because chip pocket is spent around drill bit 45 as part helix ground, so preferably obtained high rigidity.
, although the radial load that produces is little, the phenomenon that diameter obviously increases may appear also.When so determining blade position, situation is all the more so, and promptly it at first sentences the cutting edge contact workpiece in nearly pivot point.If desired, the radial load that is occurred is non-vanishing but very little, thereby instrument accurately processes required diameter.
The circumference cutting edge of blade preferably tilts, thereby it and rotating shaft and formed hole wall constitute an acute angle.This has prevented circumference cutting edge scraping hole wall.
Preferably so constitute boring bar tool, promptly the interior point of a knife of interior transposition blade is positioned at the rotating shaft next door.Rotating shaft is roughly passed through point of a knife central authorities or is crossed point of a knife.Mode by transposition blade phase countershaft slight inclination has realized that the most forward in the axial direction point is the turning point between effective main cutting edge and point of a knife, this some next-door neighbour rotating shaft.In the drill bit central area, obtained the cutting ratio of determining thus.Can avoid in the rotating shaft district Pressing drill and thin cone or needle body not to bore material ground in boring procedure has temporarily kept time.If make the drill bit skew, that's how things stand caused radial load minimum level.And at the latest when drill bit when the deviation post that is caused by radial load returns its non-migration position, the middle cone of reservation in boring procedure by smear metal continuously by avalanche, press and remove or cut off.This realizes that thus promptly the turning point between point of a knife and main cutting edge is more forward than point of a knife itself in the axial direction.If this turning point be whole axially on the most forward point, then that's how things stand.
Realized by the arrangement of above-mentioned blade on boring bar tool, in beginning boring and boring procedure, the reverse situation of total cutting force in whole cutting face, do not occurred, simultaneously power rough alignment such as other the cutting edge in the rotating shaft district that causes by cutting.Avoided the excessive wear of pointwise thus.
In addition as mentioned above, the rectangle transposition blade in the boring bar tool can cover than the obvious big diameter region of square blade.If be provided with many drill bits according to different bit diameters in this cover boring bar tool, then these drill bits perhaps can be equipped with the transposition blade of single type.If longitudinally transposition blade is packed in the minor diameter drill bit and in the major diameter drill bit of laterally it being packed into, then this is feasible.This means that in the minor diameter drill bit, the short cutting edge of transposition blade is effective cutting edge, and in the transposition blade of large diameter borehole instrument, long cutting edge is effective cutting edge.The subfractionation of bit diameter is that the different overlapping degrees by transposition blade cause.Because transposition blade is contact workpiece on its whole cutting edge length always, so cutting ratio is similar.
Accompanying drawing and affiliated description have provided other details of advantageous embodiment.Embodiments of the invention shown in the drawings.Wherein:
Fig. 1 shows the boring bar tool of the present invention that has the rectangle transposition blade with schematic perspective view.
Fig. 2 utilizes the upright projection schematic diagram that the layout of transposition blade in boring bar tool shown in Figure 1 has been shown, and wherein shows the situation of the axes of rotation skew that relative signal draws very large.
Fig. 2 a shows the layout of transposition blade shown in Figure 2 with enlarged drawing.
Fig. 3, Fig. 5, Fig. 5 a, Fig. 6 and Fig. 7 are respectively with schematic side view with independently perspective view and schematic top plan view show transposition blade.
In Fig. 1, shown a boring bar tool 1 with drill bit of an one end band handle 2.roughly become columniform and with handle 2 opposed those ends on offered chip pocket 5, this chip pocket resembles the local helix 45 degree rotatably around boring bar tool 1 rotating shaft.Be provided with two blade bearings 8,9 on the front end face 4 of boring bar tool 1, transposition blade 11,12 is fixed on the described blade bearing.If transposition blade 11,12 is fixed so that touched or cross-section rotating shaft radially more innerly, transposition blade 11,12 is set then more outerly and determines apertures.
Preferably as Fig. 2 and Fig. 3-shown in Figure 7, transposition blade 11,12 one-tenth rectangles.As shown in Figure 2, along the circumferential direction show to upright projection transposition blade 11,12, transposition blade 11 has two opposed short cutting edges 14,15 and two same opposed and parallel long cutting edges 16,17.Adjacent cutting sword 14,16 ', 16,15 ', 15,17,17 ', 14 links to each other with each point of a knife at corresponding point of a knife 18,19,20,21 places.The transposition blade 12 that has with spline structure has corresponding cutting edge and point of a knife.Cutting edge and point of a knife are to use for for the purpose of distinguishing and the same reference numerals of additional apostrophe is represented. Cutting edge 14,15,16,17 is designed to not have the straight tooth shape shape of bending and flex point.
Two transposition blades 11,12 have a center fixation hole 22,22 ', only schematically show this hole with its central point in Fig. 2.Pass a hold-down screw not shown further in the fixing hole 22,22 ', utilized this screw that transposition blade 11,12 is pressed on the blade bearing.
Being positioned among Fig. 2 to amplify of rectangle transposition blade 11,12 shows.Transposition blade 11,12 is almost parallel each other, and the point of a knife 20 ' of radially outer transposition blade 12 defines the aperture, and the point of a knife 21 of radially inner transposition blade 11 is overlapping with boring bar tool 1 rotating shaft 24.Transposition blade 11 is more forward in the axial direction, promptly further from handle 2 ground blade 11 is set than transposition blade 12.But, effective cutting edge 14,14 ' almost parallel each other.Transposition blade 11,12 phase countershafts 24 slight inclination, thus inclination sword 16,16 ' significantly than inclination sword 14,14 ' long and it 0.5 degree is arranged to 3 acute angles of spending with rotating shaft 24 double teams.Above-mentioned angle preferably is set at 1 degree to 2 degree.Cutting edge 17 ' has identical angle with hole wall 25 double teams.
Fig. 2 a has provided the design arrangement structure of transposition blade 11.Point of a knife 21 can be made of short lines as thick line is drawn.But, this point of a knife also can resemble shown in Fig. 2 a dotted line become curve shape.But in either case, transposition blade 11 all is arranged to rotating shaft 24 roughly in point of a knife 21 central areas process or crossing form.Irrelevant with the shape of point of a knife 21, its central authorities roughly are that angular bisector 27 is determined thus.By such layout, the obliquity of point of a knife, the 11 phase countershafts 24 of transposition blade has especially as shown in Figure 2 just formed axially the highest the most forward cutting point 28 in the turning point between point of a knife 21 and effective cutting edge 14.
Described at this point basic configuration can make boring bar tool be designed to possibility as Fig. 3-shown in Figure 7.Boring bar tool with minimum diameter 1 shown in Figure 3 has formed the aperture of an about 10mm, and boring bar tool 1d shown in Figure 7 provides approximately the aperture greater than 18mm.For expression difference only is equipped with the similar boring bar tool 1-1d of alphabetic flag, the difference except that its diameter is the location situation of the structure of blade bearing 8,9 and the transposition blade 11,12 that causes thus.But, all boring bar tool 1-1d are adopted unified transposition blade 11,12.As shown in Figure 3, in the boring bar tool 1 of the thinnest diameter, transposition blade the 11, the 12nd, that vertically install and obviously overlapping.Shown in the super amplification plan view in left side, the cutting edge 14 of radially inner transposition blade 11 is roughly near instrument central authorities or tool spindle/rotating shaft.On the contrary, the cutting edge 14 ' of transposition blade 12 is arranged in central authorities.This also is applicable to boring bar tool 1a shown in Figure 4 in principle, but overlapping less between the transposition blade 11,12 wherein.Learn such situation the separate views of the transposition blade 11,12 that can amplify from the right side.Show transposition blade 11 and represent it in transposition blade 12 sides with the shade dotted line with 11 '.
Compare with the overlay region 29 of the boring bar tool 1 with minimum diameter, the overlay region 29 of Xing Chenging has obviously dwindled thus.In boring bar tool 1b shown in Figure 5, also further dwindled overlay region 29.In this figure, in fact two transposition blades 11,12 contact with workpiece with maximum thickness of cutting ground by its whole cutting edge 14,14 ' length.The replacement embodiment of boring bar tool 1b has illustrated in Fig. 5 a, 5b, and the blade 12,11 of 11,12 and axial location of blade of one of them radial location fits together.
Under the bigger situation of bit diameter, such as what seen in boring bar tool 1c, the 1d shown in Fig. 6,7, transposition blade 11,12 no longer is vertically to install, but laterally install.The compound mode of vertically transposition blade 11 being installed and transposition blade 12 laterally being installed also is feasible.Laterally the long cutting edge 17,17 ' of the transposition blade of installing 11,12 is effective work edges, and short cutting edge 14 ' is the circumference cutting edge.All boring bar tool 1-1d are furnished with unified transposition blade 11,12, thereby the required storehouse management and the storage that cause thus are lowered to minimum level.
When using described at this point boring bar tool 1 (and 1a-1d), because of the rectangle and the various possible position grouping of transposition blade produced favourable cutting ratio and stressing conditions.The blade bearing of radially outer transposition blade 12 has the axially mounting face and a bigger bearing-surface that is used for the transposition blade basal plane and the side bearing face that bear the axial force that acts on the transposition blade 12.This blade bearing simple shape and can accurately making at low cost.Can realize accurately fixedly transposition blade 11,12 thus simply.In boring bar tool 1,1a, 1b, particularly owing to hold-down screw and effective cutting edge 14, the distance between 14 ' is bigger, so stressing conditions is good.Reduced bending stress (it may fixedly cause blade breakages in the porose area) on the transposition blade 11,12 according to hold-down screw apart from the effective distance of cutting edge, thereby it is safe from danger definitely.In Fig. 6 and boring bar tool 1c, 1d shown in Figure 7, this also is applicable to the rectangle transposition blade 11,12 of located lateral.Say definitely, hold-down screw and effectively the distance between the cutting edge 17,17 ' here be less, but transposition blade correspondingly alleviates because of large tracts of land supporting transposition blade 11,12 because of the weakened condition of bending stress or is assigned to bigger zone.
When using boring bar tool 1 (and 1a-1d), the peak 28 shown in Fig. 2 a is the contact workpiece surface at first, and it cuts out the very little circle of a twisted rotary shaft line 24 earlier.Forming under the situation of smear metal, whole cutting edge 14 (17) contacts with workpiece following closely, is the cutting edge 14 ' (17 ') of radially more outer transposition blade 12 after again.
Because interior transposition blade 11 has been determined the position of two transposition blades 11,12 vertically in the axial direction more forwardly, thus thus the reaction force that causes of blade greater than the roughly reverse reaction force of outer transposition blade 12.Also have a kind of radial load, it causes has the trend that drill handle part is offseted to one side.Radial load is rotated together with drill bit and produced the load of tangible boring bar tool 1 on side direction, and causes unconspicuous heeling condition in rotating.In addition, can make the skew of boring bar tool 1 end 4 slightly versatilely, reason that the aperture enlarges slightly that Here it is.
Point of a knife 21 rotates with minor radius twisted rotary shaft center line 24, thereby does not cut out smear metal with having extruding, and cone or needle body have then kept with the shaft centerline 24 material ground of pruning coaxially and not.Preferably so regulate boring bar tool 1, promptly when boring bar tool 1 remained static, point of a knife 21 intersected with shaft centerline 24.The radial load that occurs by when boring makes boring bar tool 1 skew, thus point of a knife 21 pressurizeds of transposition blade 11 and leave shaft centerline 24 and do circular motion along twisted rotary shaft center line 24.During reverse position when blade movement is static to boring bar tool 1 then point of a knife 21 can machine away residual materials.
Shown in Figure 2, as the cutting edge 17 ' of circumference cutting edge about according to transposition blade 12 slight inclination 1 degree the position and only to contact hole wall with zone that point of a knife 20 ' joins.If boring procedure is through with, then the drill bit 3 of boring bar tool 1 returns the middle position of its non-migration.Point of a knife 20 ' and cutting edge 17 ' leave hole wall 25.From then on boring bar tool 1 withdraws in the hole, and can cutting not occur on hole wall 25.
Boring bar tool 1 is furnished with rectangle transposition blade 11,12, and they have 14,15 and two quite long cutting edges 16,17 of two short cutting edges respectively.When one of them transposition blade 11 closely was arranged in boring bar tool 1 rotating shaft 24, another transposition blade 12 closely was arranged on the cylindrical that is limited by boring bar tool 1.Respectively on boring bar tool 1 end face effectively the cutting edge 14,14 ' of work be straight sword and according to the aperture situation and overlapping more or less.No flex point makes with crooked project organization and adopts same transposition blade 11,12 to become possibility in the different boring bar tool 1 of diameter.But Duplication must be change and cutting ratio remains unchanged substantially.Compared with prior art, can adopt littler minimum diameter, this is because determine according to the smallest blades size around the zone of transposition blade boring.Transposition blade is simple especially and can use in the diameter region of broad.In addition, the mounting structure of transposition blade is simple especially.Stressing conditions and be subjected to force direction simple and clear.Interior cutting edge always contacts on its total length and is cut object.
Claims (15)
1. boring bar tool (1) that is specially adapted to metal works, it has one and basic becomes columniform and (24) drill bit (3) of rotating around the shaft, this drill bit has a coaxial card handle (2) and have at least one tetragonal transposition blade (11) on its another truncated sides end (4) on the clamping side end, described transposition blade has four cutting edges (14,15,16,17), described boring bar tool also has the blade bearing that at least one is used for fixing transposition blade (11,12), the truncated sides end (4) that described blade bearing is arranged on drill bit (3) go up and from then on blade bearing extend a chip pocket (5), it is characterized in that, transposition blade (11) be one its on total length, have straight cutting edge (14,15,16,17) rectangular blade, the cutting edge (14,15 that links to each other at place, a public angle respectively, 16,17) be designed to different length respectively, for this reason according to drill bit (3) diameter and will long cutting edge or short cutting edge (14,15,16,17) be positioned on the end face of drill bit (3).
2. boring bar tool as claimed in claim 1 is characterized in that, offers a fixing hole (22) that wherein passes a hold-down screw in transposition blade (11,12) central authorities.
3. boring bar tool as claimed in claim 1, it is characterized in that, drill bit (3) has two blade bearings and two transposition blades (11,12), transposition blade (11,12) be arranged in the radial position of relativity shift, thereby its cutting edge of effectively working on drill bit (3) end face is only overlapped.
4. boring bar tool as claimed in claim 3 is characterized in that, radially effective cutting edge (14) of the transposition blade of inner setting (11) is arranged on the straight line that intersects with rotating shaft (24).
5. boring bar tool as claimed in claim 3 is characterized in that, radially effective cutting edge of the transposition blade of outer setting (12) is arranged on not on the straight line that intersects with rotating shaft (24).
6. as claim 4 and 5 described boring bar tools, it is characterized in that the straight line that is limited by effective cutting edge (14) is almost parallel each other.
7. boring bar tool as claimed in claim 3 is characterized in that, compares with effective cutting edge (14 ') of the transposition blade (12) of radially outer setting, and radially effective cutting edge (14) of the transposition blade of inner setting (11) more is positioned at the front in the axial direction.
8. boring bar tool as claimed in claim 3, it is characterized in that, at least one transposition blade (11) has a point of a knife (21) and a transposition blade (11) that is contained in the rotating shaft district and is able to location like this by corresponding blade bearing design, and promptly it extends to rotating shaft (24) at least within the specific limits.
9. boring bar tool as claimed in claim 8 is characterized in that, rotating shaft (24) is roughly at the cross-section point of a knife of centre (21).
10. boring bar tool as claimed in claim 8, it is characterized in that, the blade bearing of drill bit (3) is design like this, and promptly transposition blade (11) utilizes its turning point from effective cutting edge (14) to point of a knife (21) that more forward in the axial direction the highest cutting point (28) is defined as that cutting edge section away from rotating shaft (24).
11. boring bar tool as claimed in claim 10 is characterized in that, the turning point from effective cutting edge (14) to point of a knife (21) has constituted and has been presented axially in top cutting point (28).
12. boring bar tool as claimed in claim 1 is characterized in that, effective cutting edge (14) of inner blade (11) is at work with its total length contact workpiece.
13. the boring bar tool that a cover is made of boring bar tool as claimed in claim 1, it is characterized in that, and the boring bar tool of this cover boring bar tool (1,1a-1d) have different-diameter and all boring bar tools (1,1a-1d) be equipped with unified rectangle transposition blade (11,12).
14. boring bar tool as claimed in claim 13, it is characterized in that, and each boring bar tool (1,1a-1d) have two blade bearings and respectively by making cutting tip (11 to some extent, 12) overlapping mode has obtained different diameters, and two effective cutting edges are preferably arranged in the overlay region.
15. boring bar tool as claimed in claim 13, it is characterized in that, boring bar tool (1d) in this cover boring bar tool has at least one blade bearing, this blade bearing is with transposition blade (11,12) be fixed on such position, be that blade utilizes its long cutting edge (17,17 ') that is positioned on boring bar tool (1d) end face to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98103254 CN1203841A (en) | 1997-06-26 | 1998-06-26 | Hole-drilling tool with rectangular blade |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19727170.7 | 1997-06-26 | ||
| CN 98103254 CN1203841A (en) | 1997-06-26 | 1998-06-26 | Hole-drilling tool with rectangular blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1203841A true CN1203841A (en) | 1999-01-06 |
Family
ID=5217822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98103254 Pending CN1203841A (en) | 1997-06-26 | 1998-06-26 | Hole-drilling tool with rectangular blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1203841A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547763B (en) * | 2006-12-25 | 2011-03-09 | 住友电工硬质合金株式会社 | Throw-away drill and tip arrangement method for the drill |
| CN101720265B (en) * | 2007-06-14 | 2012-02-08 | 特固克有限会社 | Drill with cutting inserts |
| US8197163B2 (en) | 2007-03-07 | 2012-06-12 | Sumitomo Electric Industries, Ltd. | Indexable insert and drill using the same |
| CN107127377A (en) * | 2017-05-15 | 2017-09-05 | 海安国洋机械科技有限公司 | A kind of straight sword drill bit |
| CN112620739A (en) * | 2020-12-17 | 2021-04-09 | 攀钢集团攀枝花钢钒有限公司 | Drilling tool for steel rail bolt hole |
-
1998
- 1998-06-26 CN CN 98103254 patent/CN1203841A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547763B (en) * | 2006-12-25 | 2011-03-09 | 住友电工硬质合金株式会社 | Throw-away drill and tip arrangement method for the drill |
| US8388278B2 (en) | 2006-12-25 | 2013-03-05 | Sumitomo Electric Hardmetal Corp. | Indexable drill and method for arranging inserts in the drill |
| US8197163B2 (en) | 2007-03-07 | 2012-06-12 | Sumitomo Electric Industries, Ltd. | Indexable insert and drill using the same |
| CN101720265B (en) * | 2007-06-14 | 2012-02-08 | 特固克有限会社 | Drill with cutting inserts |
| CN107127377A (en) * | 2017-05-15 | 2017-09-05 | 海安国洋机械科技有限公司 | A kind of straight sword drill bit |
| CN112620739A (en) * | 2020-12-17 | 2021-04-09 | 攀钢集团攀枝花钢钒有限公司 | Drilling tool for steel rail bolt hole |
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