CN103128373A - Polycrystalline diamond reamer used for machining holes with discontinuous hole walls - Google Patents
Polycrystalline diamond reamer used for machining holes with discontinuous hole walls Download PDFInfo
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- CN103128373A CN103128373A CN2011103889790A CN201110388979A CN103128373A CN 103128373 A CN103128373 A CN 103128373A CN 2011103889790 A CN2011103889790 A CN 2011103889790A CN 201110388979 A CN201110388979 A CN 201110388979A CN 103128373 A CN103128373 A CN 103128373A
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Abstract
The invention discloses a reamer used for machining discontinuous holes. The discontinuous holes comprise hole central axes and hole walls provided with hole wall discontinuous parts and solid parts, the hole wall discontinuous parts define central angles of the hole wall discontinuous parts with respect to the hole central axes, the reamer comprises a rigid reamer body which defines the central axis of the reamer, at least three tooth-shaped bases which are formed by extending the reamer body and parallelly arranged at intervals, and polycrystalline diamond blades which are respectively fixed on each tooth-shaped base in a corresponding mode. Each polycrystalline diamond blade comprises a cutting edge located at axial remote end and a sleeking edge connected with the cutting edge, blade central included angles which are the same with the blades in number are respectively defined between the sleeking edges of adjacent blades with respect to the central axis of the reamer, the blade central included angles are not equant, and the difference between the largest central included angle and the smallest central included angle is greater than to equal to the central angles of the hole wall discontinuous parts.
Description
Technical field
The present invention relates to the reamer for machining hole, especially a kind of polycrystalline diamond reamer for the discrete hole of processing hole wall.
Background technology
Reamer is to carry out the finishing tool of last procedure for the metal aperture surface, to guarantee dimensional accuracy, form accuracy and the surface roughness in hole.Reamer commonly used in production has solid carbide reamer and high-speed reamer; At present, using in a large number polycrystalline diamond (PCD) reamer in the processing of the hole of non-ferrous metal, the polycrystalline diamond reamer is compared with high-speed reamer with solid carbide reamer, can reach less surface roughness value and stable dimensional accuracy
At present, the axial working portion length of carbide-tipped reamer commonly used is generally 0.8-3 times of reamer diameter, calibrated section length is generally 0.8-1.5 times of reamer diameter, but the axial overall length of polycrystalline diamond reamer cutting edge only has the following length of 7mm, and actual axle is to active length (wiper edges)≤5mm; Therefore, the discrete hole of hole wall (referring to have on processed hole wall axial groove or the through hole of similar keyway) is added man-hour, because hole wall is discontinuous, when a certain tooth enters discontinuous part (gap, there is no work metal) time, the cutting force of this tooth can reduce to zero suddenly, and reamer may be therefore and the disequilibrium vibration-generating; And the impact that this vibration causes on hole wall is difficult to eliminate.In addition, because surplus after a upper operation (bore, expand) is inhomogeneous (for the discontinuous workpiece of hole wall, it is inhomogeneous that surplus very easily occurs) impact, existing reamer is usually designed to the form that angle between each cutter tooth etc. minute is arranged, when having cutter tooth to enter discontinuous part, in ream work, contingent vibration can cause the precision of the processed hole wall part of all the other cutter tooth impacts, causes occurring the oval phenomenon in hole inclination and hole.And existing polycrystalline diamond reamer is very short due to the axial length of tooth, and easier the hole tilts and the phenomenon of hole ellipse because above-mentioned reason produces, and more seriously can damage cutter.The present invention is desirable to provide the hole inclination of easy appearance in the time of solving or alleviate the discrete hole of polycrystalline diamond reamer ream machining hole wall and the phenomenon of hole ellipse.
Summary of the invention
Therefore, task of the present invention is for the problems referred to above, proposes a kind of polycrystalline diamond reamer be used to processing discontinuous hole.Described hole comprises hole central axis and the hole wall that limits around this hole central axis, this hole wall is formed with the discontinuous dead slot of hole wall (or through hole) part and entity part, and the discontinuous part of described hole wall limits the central angle of the discontinuous part of hole wall about this hole central axis.At least three dentation base portions that this reamer comprises the rigidity cutter hub that limits the reamer central axis, arrange from the parallel interval of this cutter hub elongation moulding and be separately fixed at corresponding polycrystalline diamond blade on each dentation base portion, every polycrystalline diamond blade comprises the cutting edge that is positioned at axial distal end and the wiper edges that is connected with this cutting edge; Limit respectively about this reamer central axis the blade center's angle that equates with number of blades between the wiper edges of each adjacent blade, the center angle can be non-decile, wherein said blade center angle is the non-timesharing that waits, and the difference of the center angle of its maximum center angle and minimum is more than or equal to the central angle of the discontinuous part of described hole wall.
So arrange by the present invention, can effectively make up the vibration that causes when moment is lost power when there being cutter tooth to enter the discontinuous part of hole wall in hole wall and the impact that causes other cutter tooth to cause in wall.
According to a preferred embodiment, in the angle of described center, the absolute value of the difference of any two blade center's angles is greater than the central angle of the discontinuous part of described hole wall.
According to further preferred embodiment, entity part comprises when all blades of reamer all are positioned at entity part formed the first feed part and when arbitrary blade passed through the discontinuous part of described hole wall, and all the other blades that are arranged in entity part are in this entity part a plurality of second feed parts of corresponding formation respectively; Thereby the center angle of described blade is so arranged the overlapping region that makes between described a plurality of the second feed part and is minimized.
According to a particularly preferred embodiment, the central angle that reamer is configured in the discontinuous part of given hole wall is that A1 and given number of blades are in the n situation, and works as central angle and the satisfied (n of described number of blades of the discontinuous part of described hole wall
2-n+1) during A1≤360 °, a plurality of the second feeds parts are not overlapping each other.Preferably, described reamer is configured to satisfy (n when central angle and the described number of blades of the discontinuous part of described hole wall
2-n+1) during A1＞360 °, a plurality of the second feed section constructions become the central angle sum of its overlapping region to approximate greatly (n
2-n+1) A1 deducts the difference of 360 °.
Preferably, it is convergent towards distal direction that described wiper edges is configured to respect to the reamer central axis, and the tangent value at inclination angle is preferably approximately 0.08/100 in the scope of 0.06/100-0.1/100.
More preferably, described cutting edge and described reamer central axis form the tool cutting edge angle of angle between 70 °-80 °, and have the radial dimension of ream surplus more than 2 times in hole.
According to a preferred embodiment, described blade has the rake face that is positioned at this wiper edges front side on circumferentially, immediately following the circumferential cylinder land this wiper edges after, immediately following the one or more rear bight after circumferential cylinder land, wherein said circumferential cylinder land has the width of 0.2mm-0.35mm.
More preferably, described rake face has the anterior angle between-1 °-3 °, and described rear bight comprises the first and second relief angles, and this second relief angle is in the scope of 12 °-18 °.
According to another preferred embodiment, described at least three dentation base portions are arranged to extend obliquely with this reamer central axis, and have the helix angle in 0 ° of-10 ° of scope.
Description of drawings
Embodiments of the invention are now described by reference to the accompanying drawings, wherein:
Fig. 1 shows the front view according to polycrystalline diamond of the present invention (PCD) reamer;
Fig. 2 shows the partial enlarged view of A part in Fig. 1;
Fig. 3 shows the side view of seeing from the reamer axial distal end, wherein shows not blade center's angle of decile;
Fig. 4 amplifies the side view that shows polycrystalline diamond blade;
Fig. 5 a-d schematically contrasts in the discontinuous part of the hole wall that is illustrated in hole wall and the given situation of the reamer number of teeth, when having a slice blade to be arranged in the discontinuous part of hole wall, and the feed part of all the other blades of prior art reamer and reamer of the present invention.
The specific embodiment
Refer now to the following description and accompanying drawing, describe the exemplary scheme of reamer of the present invention (and prior art reamer in contrast) in detail.Although it is in order to present embodiments more of the present invention that accompanying drawing is provided, accompanying drawing needn't be drawn by the size of specific embodiments, and some feature can be exaggerated, remove or part dissects to illustrate better and explain disclosure of the present invention.
Relate to " illustrating " or similar term in specification and mean to be included at least one figure in conjunction with special characteristic, structure and characteristics that exemplary arrangement is described, but the phrase that occurs in specification " in the accompanying drawings " or similar term needn't be with reference to whole accompanying drawings.In the present invention, same or analogous parts refer to same or analogous Reference numeral so that unified and contrast.
Term " about " in the present invention or " approximately " will be understood by those of ordinary skills and will change within the specific limits according to the context of using this term.If the use of this term is unclear to those skilled in the art in the given context of using this term, " approximately " or " approximately " will refer to the plus-minus 5% of concrete numerical value or parameter value so.Mean from about X to Y from about X to about Y, wherein X and Y are occurrences.
The implication of term " central angle " or " center angle " is known to those skilled in the art herein, refers in perpendicular to the plane of central axis the formed angle take central axis as angular vertex.
Term in the present invention " discontinuous part " refer to form in hole wall at not processed recessed portion of when fraising, the keyway that for example forms in hole wall, groove or phase perforation; " entity part " refers to the hole wall part except above-mentioned discontinuous part, and entity part refers to when fraising basically by the part of ream machining.
Fig. 1 shows according to polycrystalline diamond of the present invention (PCD) reamer front view, this reamer comprises rigidity cutter hub 1 (it is for example the carbide alloy cutter hub) and at least three dentation base portions arranging from the parallel interval of this cutter hub elongation moulding, is 4 dentation base portion T1, T2, T3 and T4 in Fig. 3.This reamer also comprises the polycrystalline diamond PCD blade 2 that is separately fixed on a corresponding dentation base portion.As is known to persons skilled in the art, the rigidity cutter hub can comprise the cutter neck and be used for the handle of a knife of clamping, and described dentation base portion is arranged on the cutter neck.As shown in the figure, D is cutter teeth diameter, and it is corresponding to wanting processed workpiece hole diameter, and D1 is cutter neck diameter, and D2 is the handle of a knife diameter, and O-O ' is depicted as the reamer central axis, also referred to as the work gyroaxis of this reamer.It will be apparent to one skilled in the art that this reamer central axis overlapped with central axis to be reamed in theory in when work.During work, blade is that around reamer central axis O-O ' the work gyroaxis rotates, and in Fig. 1 along left to doing axial feed motion, and for example do counterclockwise rotatablely moving in Fig. 3, thereby cut with scissors out accurately machined wall surface of the hole by polycrystalline diamond blade 2.
Fig. 2 shows the zoomed-in view of regional A in Fig. 1.Shown in Fig. 1 and 2, the blade that it will be apparent to one skilled in the art that reamer comprises the cutting edge 3 and the wiper edges 4 that is connected with this cutting edge of the axial distal end that is positioned at cutter hub.Cutting edge 3 is used at first running into and excise allowance during at axial feed in the fraising process, and wiper edges 4 be for further smoothing wall surface of the hole so that it meets required precision, this is well known in the art, and is not described in detail in this.As shown in Figure 2, this cutting edge 3 is formed with angle with described reamer central axis, is defined herein as the tool cutting edge angle κ of cutting edge, and they are preferably between 70 °-80 °.By above-mentioned larger tool cutting edge angle is set, the radial load in the time of can reducing ream machining, when reducing discontinuous cutting by the asymmetric vibration that causes of radial cutting force and radial deflection.In addition, described cutting edge 3 also limits its radial dimension e, and this radial dimension e is preferably more than the ream surplus (monolateral) in the hole that equals 2 times.Arrange like this that the processing prevented a upper operation causes the surplus inequality and the monolateral surplus that causes greater than the radial dimension e of cutting edge, cause vibration cutting and affect processing.
As shown in Figure 1, described dentation base portion is in tilted layout with respect to this reamer central axis, but can expect that also dentation base portion and reamer central axis extend in parallel.Preferably, the dentation base portion is formed on 0 ° of helix angle β in-10 ° of scopes with respect to the reamer central axis.Setting can be so that so that the rake face (Fig. 2) of cutter end tooth cutting edge has certain anterior angle, reduce the cutting force of cutter when axial feed cuts greater than 0 helix angle β.The β value is larger, and it is more obvious that cutting force reduces effect.But the β value is excessive, makes the end tooth anterior angle excessive, thereby easily makes cutting edge 3 crumble.
Continuation is with reference to figure 1, it is convergent with respect to the reamer central axis that described wiper edges is configured to towards distal direction, be that these wiper edges (will understand from Fig. 4, and also comprise the circumferential cylinder land that is positioned at the circumferential rear side of wiper edges) are forming back taper structure DZ towards distal direction.And preferably, the tangent value of the angle of described wiper edges and described reamer central axis about 0.06/100 to about 0.1/100 scope, 0.08/100 left and right more preferably.In reamer, if back taper arranges too smallly, can produce vibration during fraising, produce chatter mark at hole wall; And if back taper is excessive, may causes the aperture of cutting with scissors out greater than predetermined hole diameter, and the revolution tool marks are arranged on hole wall.
Refer now to Fig. 3, it is the side view of seeing from the reamer axial distal end, and this side view is perpendicular to the axis of rotation O-O ' of reamer.In conjunction with Fig. 1 and 3, as shown in the figure, show dentation base portion T1, T2, T3, the T4 of 4 inclinations and layout parallel to each other, and limit chip area between described dentation base portion.The direction of chip area is identical with helix angle with angle.Satisfying under the prerequisite of chip removal, the degree of depth of chip area is the smaller the better, to increase the rigidity of cutter.Although 4 dentation base portions have been shown in Fig. 1 and 3, can be also other numbers, for example schematically show 3 dentation base portions in Fig. 5 b, can also be other more number.But according to dentation base portion T of the present invention 〉=3.As shown in figs. 1 and 3, have groove on dentation base portion T1, T2, T3, T4, it is used for fixing (for example welding or gluing) polycrystalline diamond PCD blade 2, thereby forms several all teeth of reamer.
As shown in Figure 3, limit respectively about this reamer central axis four angle W1 of blade center, W2, W3, the W4 that equates with number of blades between each adjacent blade (specifically wiper edges), what can expect is, if the blade of different numbers is arranged, also will have blade center's angle of this number.In the present invention, the blade center angle is decile not preferably, and this will advance to describe in detail hereinafter.
Next with reference to figure 4, show in the side view of polycrystalline diamond reamer the partial enlarged drawing of a dentation base portion T1 and PCD blade section.As shown in Figure 4, blade have be positioned on circumferentially this wiper edges front side, as the rake face 5 of metal fillings flux surface, immediately following the circumferential cylinder land b this wiper edges after, (be in the drawings two immediately following the one or more rear bight after circumferential cylinder land, i.e. the first relief angle and the second relief angle), this is structure well known by persons skilled in the art.In an illustrated embodiment, wiper edges projects into a bit, and rake face and cross cutter centre of gyration O and the line of wiper edges subpoint between angle be smoothing anterior angle γ, smoothing anterior angle γ=0 ° of left and right is for example in the scope of-1 ° to 3 °.Preferably, this circumferential cylinder land b has the circumferential width of about 0.2mm-0.35mm.As shown in the figure, the second relief angle α is in the scope of 12 °-18 °.
For circumferential cylinder land b, can more specifically so arrange, namely the reamer diameter is larger, and circumferentially the cylinder land is wider; But circumferentially the cylinder land is narrow or wide, all is unfavorable for guaranteeing the roughness of hole surface.Schematically show hereinafter the relation of the width of reamer diameter D and circumferential cylinder land b in table 1.
The relation of table 1---reamer diameter and circumferential cylinder land
For the first relief angle, its requirement is less than the second relief angle α, but dodging after guaranteeing to process is mainly according to the second relief angle α.Limit in the present invention α=about 12 °-18 °.But more preferably, the reamer diameter is larger, and all tooth the second relief angle α are less, prevents friction between rear knife face or cutter hub and workpiece to be machined surface and affects the roughness on workpiece to be machined surface.Schematically show hereinafter the relation of reamer diameter D and the second relief angle α in table 2.
The relation of table 2---reamer diameter and the second relief angle
Below in conjunction with Fig. 3 and 5a-d, thought of the present invention is described.Existing reamer for easy to process, adopts blade (wiper edges or rather) the center angle of decile usually when design; And it is as indicated above, the present invention is directed to the processing with discontinuous hole, select the wiper edges center angle of decile not, and the angle of each center angle is set meticulously, to realize entering discontinuous part (gap when a certain cutter tooth, non-processing metal part in other words) time (in the case, the cutting force of this tooth reduces to zero suddenly), alleviate the reamer disequilibrium and the degree of vibration-generating, and can make impact that all the other cutters tooth cause hole wall in this process can after made up, thereby avoid effectively occurring that the hole tilts or the hole becomes oval.
Mainly the hole that is designed for processing as Fig. 3 and reamer shown in Figure 5, this hole comprises hole central axis and the hole wall that limits around this hole central axis, this hole wall is formed with the discontinuous part of not processed hole wall and entity part, and the discontinuous part of described hole wall limits the central angle (for example seeing the central angle A1 of the discontinuous part of hole wall of Fig. 5 a and c) of the discontinuous part of hole wall about this hole central axis.These holes can be substantially rounded, but have part not need the shape of processing, and namely to have at least part of be the face of cylinder that given radius is arranged in this hole, but remainder is than the discontinuous part of the more recessed hole wall in the face of cylinder of this given radius.Although be the explanation of carrying out for a discontinuous part of hole wall, can expect that the present invention also is applicable to the discontinuous part of a plurality of hole walls in Fig. 5 a-d.
Fig. 3 schematically shows according to a reamer of the present invention, comprises four dentation base portion T1 being correspondingly provided with a slice PCD blade on it, T2, T3, T4 and and then defines four angle W1 of blade center, W2, W3, W4.In setting according to the present invention, stipulated that blade center's angle is non-decile design, and the center angle of preferred maximum is greater than with the difference of the center angle of minimum the central angle that equals the discontinuous part of hole wall, more preferably, in these blade center's angles the absolute value of the difference of any two blade center's angles greater than the central angle of the discontinuous part of hole wall.By such setting, when having cutter tooth to enter the discontinuous part of hole wall, all the other cutter tooth feed parts can be made up well.
Refer now to Fig. 5 a-d and contrast in the discontinuous part of the hole wall that is illustrated in hole wall and the given situation of the reamer number of teeth, when having a slice blade to be arranged in the discontinuous part of hole wall, the feed part of all the other blades of prior art reamer and reamer of the present invention.In Fig. 5 a-d, having selected cutter tooth is 3, i.e. T1, T2, T3, and correspondingly formed three angle W1 of blade center, W2, W3, and in the prior art reamer of Fig. 5 a, W1=W2=W3=120 °.And in Fig. 5 a-d, the discontinuous part of regulation hole wall is with respect to central angle A1=15 ° of the discontinuous part of hole wall of hole central axis.Formed when in this article, all blades of regulation reamer all are positioned at entity part is the first feed part.as shown in Fig. 5 b, in situation as blade center's angle of the decile of Fig. 5 a defined, in the time of in the discontinuous part of arbitrary cutter tooth process hole wall, all the other two cutters tooth correspondingly on hole wall identical position repeatedly form the second feed part B1, B1 ', B2 " and C1, C1 ', C1 ", and the first feed part that machining accuracy is higher and vibratility is lower does not overlap fully with the second feed part, therefore the not only easy disequilibrium of reamer and vibration-generating, and the impact that when having cutter tooth to pass through the discontinuous part of hole wall, all the other cutters tooth is caused (the second feed part) also fails to be made up, therefore hole inclination or hole easily occur and become oval.And the present invention as shown in Fig. 5 c, the present invention has set W1=100 °, dentation base portion (and blade) arrangement of W2=140 ° and W3=120 °, thereby when first, second, and third dentation base portion T1 passes through the discontinuous part of (counterclockwise) hole wall successively, all the other two blades are correspondingly passed by the second feed partly for B2, C2; B2 ', C2 '; B2 "; C2 ", as shown in Fig. 5 d, these the second feed parts all do not overlap each other, therefore, can after continued again this part of processing to make up the impact that when having cutter tooth to pass through the discontinuous part of hole wall, all the other cutters tooth is caused by the first feed part of all the other cutters tooth.
In a word, thus should arrange so that according to blade center of the present invention angle the circumferential overlapping region that makes between described a plurality of the second feed part minimizes.Realize like this that more specifically circumferential overlapping region minimizes, the central angle that is configured in the discontinuous part of given hole wall when described reamer is that A1 and given number of blades are in the n situation, when arbitrary blade was passed through the discontinuous part of described hole wall, all the other blades had correspondingly formed the second feed part central angle of summation for (n-1) A1; When each blade all passed through the discontinuous part of described hole wall, the central angle summation of formed all the second feed parts was n (n-1) A1 so.Thus, can understand as n (n-1) A1≤360 °-A1, i.e. (n
2-n+1) during A1≤360 °, the central angle of the second feed part summation (circumferential size in other words) is less than the central angle (circumferential size) of the entity part in hole, thereby the present invention can make the second feed part of every blade not overlapping each other by each different blade center angle reasonably is set.And work as (n
2-n+1) during A1＞360 °, (n
2-n+1) A1-360 ° poor, be namely the minimum angles (circumferentially overlapping region central angle) that the second feed partly has to overlap, thereby the present invention can make the central angle sum of its second overlapping region approximate greatly above-mentioned difference by each different blade center angle reasonably is set.Annotate: at this indication overlapping region central angle, overlapping if any the second feed part more than two, its actual overlapping region central angle should refer to B
Always=(m-1) B, (m refers to the second overlapping feed part number, and B refers to the central angle that this overlapping region records by geometric meaning).
By above-mentioned setting of the present invention, in for discontinuous hole wall processing, because tooth does not stress in the dead slot that is interrupted, reamer easily loses the balance vibration-generating, has carried out the optimal design of the central angle W of tooth; And on the inhomogeneous impact of surplus after upper brill (expansion) operation, carried out the optimal design of other parameter, to reduce radial load, make reamer that certain centering capacity be arranged, and can effectively make up the impact that when having cutter tooth to enter the discontinuous part of hole wall, processed hole wall is partly caused, thereby guaranteed the crudy of polycrystalline diamond (PCD) reamer to the discontinuous hole of hole wall.Reduce defective products, improved product quality, reduced production cost, and improved production efficiency.
Although should be pointed out that the many details that show the preferred embodiments of the present invention and described reamer of the present invention by these embodiment, the applicant does not plan scope of the present invention is confined to these details.Those skilled in the art after reading disclosure of the present invention, be readily understood that the present invention other advantage and the change that these technical schemes are made.Therefore, those skilled in the art can be in the situation that do not break away from the desired thought of the present invention of applicant and scope and make combination, replace or change.That specification of the present invention will be interpreted as will be all novelties of comprising these combinations, replace or changing and non-obvious, based on the scheme of inventive concept, thereby can present these schemes in the application's claim.Thus, scope of the present invention is not to determine with reference to above-mentioned explanation, and should be to determine with reference to all equivalency range that appending claims and these claims have.
Claims (10)
1. reamer that is used for machining hole, wherein, described hole comprises hole central axis and the hole wall that limits around this hole central axis, and this hole wall comprises the discontinuous part of hole wall and entity part, and the discontinuous part of described hole wall limits the central angle of the discontinuous part of hole wall about this hole central axis; At least three dentation base portions that this reamer comprises the rigidity cutter hub that limits the reamer central axis, arrange from the parallel interval of this cutter hub elongation moulding and be separately fixed at corresponding polycrystalline diamond blade on each dentation base portion, every polycrystalline diamond blade comprises the cutting edge that is positioned at axial distal end and the wiper edges that is connected with this cutting edge; Wherein, limit respectively about this reamer central axis the blade center's angle that equates with number of blades between the wiper edges of each adjacent blade, wherein, described blade center angle is non-decile and maximum blade center's angle and the central angle of the difference of minimum blade center's angle more than or equal to the discontinuous part of described hole wall.
2. reamer according to claim 1, is characterized in that, in described at least three blade center's angles, the absolute value of the difference of any two blade center's angles is greater than the central angle of the discontinuous part of described hole wall.
3. reamer according to claim 1, it is characterized in that, entity part comprises when all blades of reamer all are positioned at entity part formed the first feed part and when arbitrary blade passed through the discontinuous part of described hole wall, and all the other blades that are arranged in entity part are in this entity part a plurality of second feed parts of corresponding formation respectively; The center angle of described blade is arranged so that the overlapping region between described a plurality of the second feed part minimizes.
4. reamer according to claim 3, is characterized in that, the central angle that described reamer is configured in the discontinuous part of given hole wall is that A1 and given number of blades are in the n situation, and work as central angle and the satisfied (n of described number of blades of the discontinuous part of described hole wall
2-n+1) during A1≤360 °, described a plurality of the second feeds parts are not overlapping each other.
5. reamer according to claim 4, is characterized in that, described reamer is configured to as the central angle of the discontinuous part of described hole wall and the satisfied (n of described number of blades
2-n+1) during A1＞360 °, described a plurality of the second feed section constructions become the central angle sum of its overlapping region to approximate greatly (n
2-n+1) A1 deducts the difference of 360 °.
6. the described reamer of any one according to claim 1 to 5, it is characterized in that, it is convergent with respect to the reamer central axis that described wiper edges is configured to towards distal direction, and the tangent value of the angle of this wiper edges and this reamer central axis is in 0.06/100 to 0.1/100 scope.
7. the described reamer of any one according to claim 1 to 5, it is characterized in that, described cutting edge and described reamer central axis form the tool cutting edge angle (κ) of angle between 70 °-80 °, and have the radial dimension (e) of ream surplus more than 2 times in this hole.
8. the described reamer of any one according to claim 1 to 5, it is characterized in that, described blade has the rake face that is positioned at this wiper edges front side on circumferentially, immediately following the circumferential cylinder land this wiper edges after, immediately following bight after the one or more wiper edges after circumferential cylinder land, wherein said circumferential cylinder land has the width of 0.2mm-0.35mm.
9. reamer according to claim 8, is characterized in that, described rake face has the wiper edges anterior angle between-1 ° to 3 °, and after described wiper edges, the bight comprises the first and second relief angles, and this second relief angle is in the scope of 12 °-18 °.
10. the described reamer of any one according to claim 1 to 5, is characterized in that, described at least three dentation base portions are arranged to extend obliquely with this reamer central axis, and have the helix angle in 0 ° of-10 ° of scope.
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| CN201110388979.0A CN103128373B (en) | 2011-11-30 | 2011-11-30 | For processing the Polycrystalline diamond reamer in the discrete hole of hole wall |
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| CN201110388979.0A CN103128373B (en) | 2011-11-30 | 2011-11-30 | For processing the Polycrystalline diamond reamer in the discrete hole of hole wall |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2839913A1 (en) * | 2013-08-14 | 2015-02-25 | Gühring Kg | Reamer tool with chip guiding element |
| CN109848482A (en) * | 2019-04-17 | 2019-06-07 | 国宏工具系统（无锡）股份有限公司 | PCD combination cutter |
| JP6697131B1 (en) * | 2018-06-28 | 2020-05-20 | 株式会社アライドマテリアル | Reamer |
| CN112351853A (en) * | 2018-06-28 | 2021-02-09 | 联合材料公司 | Reamer bit |
| CN113478015A (en) * | 2021-07-19 | 2021-10-08 | 重庆渝江压铸有限公司 | New energy motor shell bearing hole machining process |
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| CN201596817U (en) * | 2009-06-05 | 2010-10-06 | 孔凡智 | High-precision wear-resistance reamer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2839913A1 (en) * | 2013-08-14 | 2015-02-25 | Gühring Kg | Reamer tool with chip guiding element |
| JP6697131B1 (en) * | 2018-06-28 | 2020-05-20 | 株式会社アライドマテリアル | Reamer |
| CN112351853A (en) * | 2018-06-28 | 2021-02-09 | 联合材料公司 | Reamer bit |
| US11724323B2 (en) | 2018-06-28 | 2023-08-15 | A.L.M.T. Corp. | Reamer |
| CN112351853B (en) * | 2018-06-28 | 2023-10-03 | 联合材料公司 | Reamer bit |
| CN109848482A (en) * | 2019-04-17 | 2019-06-07 | 国宏工具系统（无锡）股份有限公司 | PCD combination cutter |
| CN113478015A (en) * | 2021-07-19 | 2021-10-08 | 重庆渝江压铸有限公司 | New energy motor shell bearing hole machining process |
| CN113478015B (en) * | 2021-07-19 | 2023-02-24 | 重庆渝江压铸有限公司 | New energy motor shell bearing hole machining process |
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| CN103128373B (en) | 2015-09-30 |
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