CN1033764A - Imitating milling cutter - Google Patents
Imitating milling cutter Download PDFInfo
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- CN1033764A CN1033764A CN 87105987 CN87105987A CN1033764A CN 1033764 A CN1033764 A CN 1033764A CN 87105987 CN87105987 CN 87105987 CN 87105987 A CN87105987 A CN 87105987A CN 1033764 A CN1033764 A CN 1033764A
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- milling cutter
- cutter
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Abstract
Imitating milling cutter comprises the cylindrical cutter body (1) of dribbling shape cutter head (2).Done groove (4) in cutter head (2) lining, the blade (5) of a slice band cutting edge is housed in each groove, in fact this blade is positioned at cutter spindle to cutting plane.Projection and the milling cutter longitudinal axis (13) of the longitudinal axis (12) of each groove (4) on the milling cutter axial cross section constitutes acute angle, its angular range is 20 °～40 °, and the longitudinal axis of each groove (4) therewith the intersection point in cross section be positioned near the milling cutter longitudinal axis (13) and the spherical plane point of intersection of cutter head (2).
Description
The invention belongs to cutter and make the field, saying so exactly relates to the invention of imitating milling cutter.
Imitating milling cutter manufactured according to the present invention can be used for the steel and the alloy product of complicated shape, the for example processing of pressing mold can be used for carrying out roughing or fine finishining on digital process control combination milling cutter bed or the profiling machine and on digital process control coordinate bed in aviation, shipbuilding, lathe manufacturing and machine industry.
A kind of imitating milling cutter (US, A, 4525110) of adorning two carbide cutting blades of system is arranged.Have the groove of forming, supply the dress cutting tip to use by two datum levels on the knife head ball of cutter hub, the cutting edge of blade is positioned on the axial cutting plane of cutter hub.The cutting tip parallelogram, its minor face changes circular arc into.The cutting edge part of blade is made of arc section and straightway.Each blade has two through holes to be positioned on the diagonal, by these two through holes blade is fixed on the pad, and pad is fixed in the groove of cutter head by screw again.Owing to the size of the groove of adorning this shape blade is too big, the strength and stiffness index of the knife head ball of this milling cutter all is low.
Two blades are placed in the groove and can not guarantee fixedly rigidity of enough blades, thereby have got rid of the possibility that adopts this milling cutter with big cutting depth processing metal the time.This milling cutter manufacturing complicated and also work unreliable.
The imitating milling cutter (US, A, 4252480) that also has a kind of shape cutter head of dribbling has the groove for the dress cutting tip on the cutter head, blade is fixed on the groove with screw through centre bore by diagonal control arm.Each blade all is the curvilinear triangle of evagination, and its cutting edge partly is circular arc.
The front end of cutting tip is positioned at cutter spindle on cutting plane.In the time of fixedly, preceding effective cutting edge of each cutting tip and cutter spindle intersect, and relative first blade of another cutting tip has skew, effective cutting edge of two blades can be depicted the hemisphere of a closure in the space when being displaced to the milling cutter rotation, and its radius equals the radius of curvature of cutting edge part.
Owing to the reason (when processing these grooves, the metal that shoot off reaches 50%) of shape of the groove of dress cutting tip, the knife head ball strength and stiffness of above-mentioned milling cutter are all low.
With the cutting specification processing work strengthened the time, can not use this milling cutter, because complete knife head ball profile of cutting edge formation of two blades during the milling cutter rotation.With diagonal control arm blade is fixed in the groove, enough reliabilities are arranged in the time of can not guaranteeing the milling cutter operation.The sharpening work complexity of this cutting tip consumes a large amount of work again and make this milling cutter.
Other has a kind of fraze of the shape cutter head of dribbling, and (FR, A No.2433998), are used for the processing precise groove.On knife head ball, on the milling cutter longitudinal cross-section, begin to have the groove that longitudinally opens wide from the termination, two cutting tips are housed in the groove, blade is truncated cone shape, and it is circular-arc that cutting edge partly is.Blade has the piece optical plane so that be attached on the cell wall, thereby avoids blade rotation when cutting.The cutting edge of each in two blades is described a complete knife head ball profile when milling cutter rotates.Realize cutting tip fixing in groove through the centre bore on the blade with screw.
Adorn blade by the hole, by the way of extruding knife head ball fixed blade,, and can not guarantee the accurate location of blade and fix reliably then owing to the wall of blade and groove can not be fitted fully.Since by blade shapes the shape of determined groove, the rigidity of knife head ball and intensity index are all low.Therefore this milling cutter can only be used for cutting little surplus.
Task of the present invention is the imitating milling cutter of development dress system blade, and its each blade all is contained in separately the groove.The relative cutter spindle of each blade is wanted to make blade when high-reliability to the mutual configuration and the location of cutting plane, has high rigidity and intensity index under the cutting specification condition of strengthening.
This task leans on the milling cutter scheme that provides below to be solved.This imitating milling cutter has the cylindrical cutter body of a dribbling shape cutter head.Fixing the blade with cutting edge in the cutter head, in fact cutting edge is positioned at cutter spindle to cutting plane.By the present invention, each blade of milling cutter all is fixed in separately the groove.The longitudinal axis of each groove is at the projection of cutter spindle on cutting plane and the longitudinal axis formation acute angle of milling cutter, and the intersection point in the longitudinal axis of groove and this cross section is positioned near the milling cutter longitudinal axis and the cutter head spherical surface intersection point.
Compare with the milling cutter construction of known dress cutting tip, improve greatly in rigidity and intensity index on cutter hub cylindrical part direction with the knife head ball of this groove.With regard to these indexs of milling cutter, not second to the milling cutter of welding cutting tip.So just can when being used for processing work, the increase cutting depth increase the depth of cut and cutting speed.With the exception of this, the rigidity of knife head ball can increase the durability of the blade of band cutting edge, has correspondingly reduced the cost of workpiece to be machined.Groove in the milling cutter knife head ball guarantees to make the blade of band cutting edge accurately to locate, and is fixing reliable, it is convenient to change, and be suitable for the knife head ball that on grinding machine, is processed with this groove, guaranteeing high accuracy and high-quality, thereby improve the work degree of accuracy and the reliability of milling cutter.
The beat of this cutting plate for milling cutters cutting edge is not more than 0.04mm, and the beat of sphere is not more than 0.07mm.
Under the situation that keeps high rigidity of knife head ball and intensity index,, acute angle is in 20 °～40 ° the scope for fixed blade reliably in groove.
Under the situation of improving the milling cutter condition of work, in order to increase the milling cutter durability, be preferably in and do three grooves on the knife head ball at least, and will make the cutting edge of each blade in three blades form a sphere at least when milling cutter rotates, its radius equals the radius of curvature of this cutting edge.
Allowing each of blade of band cutting edge all be circle lacks shape and conforms with purpose.The blade of this shape, when milling cutter assembles, can guarantee the very high degree of accuracy and durability and on cylindrical grinder during sharpening labour expenditure minimum.
When the milling cutter of processing and fabricating minor diameter, when rigidity that keeps them and durability, blade will be circle and lack shape, and to an end of cutting plane flat segments will be arranged near cutter spindle at it, and flat segments has individual inclination angle to the end that circle lacks.At this moment, to there be the flat segments of a blade to be positioned at cutter spindle at least to cutting plane.
When having the part in dark chamber, preferably make blade triangular in shape with milling cutter processing.Its cutting edge is formed by connecting by arc section and straightway.
Imitating milling cutter specific embodiment of the present invention is described below.In the figure that provides:
Fig. 1 is the imitating milling cutter schematic diagram that the band circle lacks the shape blade, and this figure is the front view of partial cutaway.
Fig. 2～3 are a kind of embodiment of knife head ball, are the front views of band partial cutaway.
Fig. 4 and Fig. 1 are vertical views together.
Imitating milling cutter comprises cylindrical cutter body 1, knife head ball 2 and taper caudal peduncle 3(Fig. 1).2 li 3 grooves 4 to be arranged at least at knife head ball, fix good blade 5,6,7(Fig. 1 of mill of a removable band cutting edge in each groove, 2,3).
Blade 5,6,7 can be made of high-speed steel, or makes of carbide alloy.Each side towards 4 ends of groove at blade 5,6,7 has a groove 8, and with it, blade is positioned on the groove 4 with pin 9, to avoid vertically moving and guarantee that the cutting edge of blade 5,6,7 is positioned at the axial cutting plane of milling cutter.Realize blade 5,6,7 fixing (Fig. 4) on groove 4 with wedge 10 and screw 11.At this moment each of the flat inner surface of wedge 10 and blade 5,6,7 connects subsides, and the shape of outer surface is consistent with the curved surface of knife head ball 2.Owing to the groove 4 and the corresponding configuration of these grooves on knife head ball of this given shape provided by the invention are arranged, just make this better way of the blade 5,6,7 of band cutting edge fixedly become possibility.Projection and the milling cutter longitudinal axis 13 of the longitudinal axis 12 of each of groove 4 on the milling cutter axial cross section constitutes sharp angle, its angle value is in 20 °～40 ° scopes, and the intersection point in the longitudinal axis 12 of each groove 4 and this cross section is positioned near the intersection point of the milling cutter longitudinal axis 13 and cutter head 2 spherical surfaces.Should be not enough to guarantee that the blade 5,6,7 each can both fix reliably from the degree of depth of α＜20 ° time slot 4, reduce this two aspect and consider the selected angle value and the rigidity of knife head ball 2 and intensity index will take place when α＞40 °.
Do groove 4 by above-mentioned way, the amount of metal of shooting off is minimum.Simultaneously, when shifting to the column part of cutter hub 1 away from cutter spindle 13 with the intersection point of cutter head 2 spherical surfaces, the rigidity and the intensity of cutter head 2 sharply raise.Because groove 4 all surfaces all may be processed on grinding machine, so when machining accuracy was very high, the work of making the required consumption of milling cutter was minimum.
Different with the milling cutter size according to condition of work, the blade of band cutting edge has various shape.Blade 5(Fig. 1 of band cutting edge) be circle and lack shape and be fixed on the groove 4, the longitudinal axis 12 and cutter spindle are higher than the intersection point of cutter spindle 13 and cutter head 2 spherical surfaces to the intersection point of cutting plane here.This embodiment of knife head ball 2 guarantees that its rigidity and intensity are maximum, and it is also convenient to make.
Blade 6(Fig. 2 of band cutting edge) be circle and lack shape, to an end of cutting plane one section straight portion 14 is arranged near cutter spindle at it, it is angled with the end that circle lacks, and wants one straight portion in the blade 6 to be positioned at cutter spindle on cutting plane at least.
Such blade 6 is fixed on 4 li of grooves, and the intersection point of the longitudinal axis 12 and milling cutter axial cross section is lower than the intersection point of cutter spindle 13 and cutter head 2 spherical surfaces here.The embodiment of above-mentioned knife head ball 2 can be used for the milling cutter of minor diameter, under the situation that guarantees rigidity that cutter head 2 is enough and intensity, guarantees the secure fixation of cutting tip 6 by the degree of depth of oversized slots 4.The blade 5 of above-mentioned shape, 6(Fig. 1,2) easy to make and be convenient to the back of milling cutter on the circumference grinding machine.Blade 7(Fig. 3 of band cutting edge) shape triangular in shape, its cutting edge is formed by connecting by arc section and straightway 15,16.
Blade 7 is fixed on 4 li of grooves, and the longitudinal axis 12 and cutter spindle are higher than the intersection point of cutter spindle 13 and cutter head 2 spherical surfaces to the intersection point of cutting plane here.This blade 7 has the cutting edge of lengthening, and therefore when processing had the part in dark chamber, this milling cutter was irreplaceable.The assembling of milling cutter is carried out as follows: in order to locate and fixing reliable, each of blade 5,6,7 all leans on groove 8 to be contained on the pin 9, and pin is positioned at 4 li of the grooves of knife head ball 2.At this moment cutting edge is positioned at cutter spindle on cutting plane.Put wedge 10 into also by hole the turn of the screw 11 in cutter head of wedge to 4 li of grooves then, at this moment one of inner surface of wedge 10 connects subsides with the blade 5,6,7 of band cutting edge, and the wall of another side and groove 4 amplexiforms.
All elements of milling cutter all are interchangeable, under the state that assembles departing from of sphere is no more than 0.07mm, and the beat of blade 5,6,7 cutting edges are not more than 0.94mm.Milling cutter is installed with taper caudal peduncle 3, and strains (not drawing on the figure) through the screwed hole of milling cutter body 1 tapering part with pull bar.
To workpiece, for example pressing mold is processed on the milling machine that has digital process control.At this moment milling cutter has an inclination angle to the surface of part to be processed.Contain milling cutter rotation (cutting speed), and give with crossing feed of moving from top to bottom along clinoplain, the part that is contained on the machine tool workbench gives the circumference feed.
Some zones are arranged in pressing mold, and imitating milling cutter is accompanied by incision and mills, laterally mills and mill along the inclined-plane when carrying out work there.One of major advantage of this milling cutter is, each cutting edge of at least three blades 5,6,7 is described a sphere when milling cutter rotates, and its radius equals the radius of curvature of this cutting edge.So just can give each blade 5,6,7 to the surplus that is cut material along cutting edge length.Thereby make milling cutter not have the work of bump ground, the cutting edge of protection blade 5,6,7 is tipping not.
Machining tool steel pressing mold is used following cutting specification: feed 500mm/min, rotation frequency of spindle 800r/min, cutting depth 22mm.The life-span of the milling cutter of diameter 80mm is 8～12h according to the present invention, and the no more than 4h of milling cutter of welding presses US, A, and 4252480 dress system milling cutter has only a few minutes.
The milling cutter of making by the present invention owing to do not have internal stress in the blade with cutting edge, so the Rigidity and strength of milling cutter not second to the milling cutter of welding blade, thereby the life-span of this milling cutter is significantly increased.
Claims (8)
1, imitating milling cutter comprises cylindrical cutter body (1), knife head ball (2), is fixing the blade (5,6,7) of cutting edge in the cutter head, and in fact blade is positioned at the axial cutting plane of milling cutter.The difference of this milling cutter and other milling cutter is: each of blade (5,6,7) all is fixed on groove (4) lining separately, projection and the cutter spindle of the longitudinal axis (12) of each groove (4) on the milling cutter axial cross section constitutes acute angle, and the longitudinal axis of each groove (4) therewith the intersection point in cross section be positioned near the milling cutter longitudinal axis (13) and cutter head (2) the spherical surface intersection point.
2, imitating milling cutter according to claim 1, the scope that is characterized in acute angle are 20 °～40 °.
3,, be characterized in that knife head ball (2) lining has 3 grooves (4) at least according to claim 1,2 described imitating milling cutters.
4, according to the described imitating milling cutter of claim 1～3, be characterized in that each all describes a sphere when milling cutter rotates at least in the cutting edge of three blades (5,6,7), its radius equals the radius of curvature of this cutting edge.
5,, be characterized in that the blade (5,6) with cutting edge is the scarce shape of circle according to the described imitating milling cutter of claim 1～4.
6, imitating milling cutter according to claim 5 is characterized in that each circle lacks and to an end of cutting plane one section straight portion (14) arranged near cutter spindle, and it has individual inclination angle to the end that circle lacks.
7, imitating milling cutter according to claim 6 is characterized in that one straight portion (14) in the blade (6) at least is positioned at cutter spindle to cutting plane.
8, according to the described imitating milling cutter of claim 1～3, be characterized in that blade (7) is triangular in shape, its cutting edge is made up of circular arc and straightway (15,16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105987 CN1033764A (en) | 1987-12-28 | 1987-12-28 | Imitating milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105987 CN1033764A (en) | 1987-12-28 | 1987-12-28 | Imitating milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1033764A true CN1033764A (en) | 1989-07-12 |
Family
ID=4815532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105987 Pending CN1033764A (en) | 1987-12-28 | 1987-12-28 | Imitating milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033764A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228999A (en) * | 2011-04-01 | 2011-11-02 | 浙江恒成硬质合金有限公司 | Cutter for cutting hard alloy |
| CN102990785A (en) * | 2011-09-09 | 2013-03-27 | 深圳市中天精密工具有限公司 | Manufacture process of polycrystalline diamond ball-end cutter |
| CN107030581A (en) * | 2017-06-05 | 2017-08-11 | 浙江机电职业技术学院 | A kind of polishing tool |
-
1987
- 1987-12-28 CN CN 87105987 patent/CN1033764A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228999A (en) * | 2011-04-01 | 2011-11-02 | 浙江恒成硬质合金有限公司 | Cutter for cutting hard alloy |
| CN102990785A (en) * | 2011-09-09 | 2013-03-27 | 深圳市中天精密工具有限公司 | Manufacture process of polycrystalline diamond ball-end cutter |
| CN102990785B (en) * | 2011-09-09 | 2014-12-10 | 深圳市中天精密工具有限公司 | Manufacture process of polycrystalline diamond ball-end cutter |
| CN107030581A (en) * | 2017-06-05 | 2017-08-11 | 浙江机电职业技术学院 | A kind of polishing tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |