CN202804305U - Polycrystalline diamond milling cutter - Google Patents
Polycrystalline diamond milling cutter Download PDFInfo
- Publication number
- CN202804305U CN202804305U CN 201220494881 CN201220494881U CN202804305U CN 202804305 U CN202804305 U CN 202804305U CN 201220494881 CN201220494881 CN 201220494881 CN 201220494881 U CN201220494881 U CN 201220494881U CN 202804305 U CN202804305 U CN 202804305U
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- tooth
- milling cutter
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- end tooth
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Abstract
The utility model provides a milling cutter, which is used for processing a forming surface and rotates around a central axis. The milling cutter comprises a rigid cutter body (1) and polycrystalline diamond blades (2), wherein at least two tooth bases (10) arranged in parallel at an interval are arranged on the cutter body; the polycrystalline diamond blades (2) are respectively fixed on each tooth base; the polycrystalline diamond blades (2) axially extend out of the tail end of the rigid cutter body (1) to form end teeth (4) while a peripheral tooth (3) is defined at the radial outer side of each polycrystalline diamond blade; the milling cutter also comprises a cooling structure; the cooling structure comprises a main cooling channel (3) formed inside the cutter body, and cooling holes (6 and 8) which are communicated with the main cooling channel (3) and supply cooling liquid to the blades (2).
Description
Technical field
The utility model relates to a kind of polycrystalline diamond milling cutter be used to shaping face, in particular for the polycrystalline diamond milling cutter of machining titanium alloy.
Background technology
Titanium alloy is new material commonly used in modern Aviation, the space flight, and its light weight, hardness are high, and toughness is high, corrosion stability is good, poor thermal conductivity (generally only have 1/5 of iron, aluminium 1/3), coefficient of friction large (being approximately 0.42).Just because of this, in the processing of titanium alloy, for example during machining, titanium alloy workpiece and cutter temperature are raise, cause sticking cutter, reduce cutter life, so machinability is poor, brought very large difficulty for the machining of titanium alloy.
Milling cutter is a kind of cutter of processing for component shaping being looked like metal surface or other surface.In the production, usually adopt cylindrical milling cutter that the forming face that comprises the plane is processed, its means generally be by milling cutter rotarily drive that cutting edge machines away in the workpiece some form the surface of the work of wanting.Current, what commonly use in the processing of non-ferrous metal forming face is solid cemented carbide milling cutter or high-speed steel milling cutter.But in some hard metals processing of titanium alloy or other, above-mentioned two kinds of cutters all can not overcome the problems referred to above well, thereby can not carry out the continuous processing of long period, and cutter life is short, cause that productivity ratio is low, yield rate is low.
Therefore, the utility model is desirable to provide a kind of milling cutter that can effectively process the hard metal that comprises titanium alloy.
Summary of the invention
According to a scheme of the present utility model, provide a kind of be used to shape face around the rotating milling cutter of central axis, comprising: rigidity cutter hub, this cutter hub have at least two tooth bases that parallel interval is arranged; With the polycrystalline diamond blade that is separately fixed on each tooth base.Polycrystalline diamond blade extends axially the end that exceeds described rigidity cutter hub to form end tooth.The outermost radial outside of described polycrystalline diamond blade limits all teeth.This milling cutter also comprises interior cooling structure, and described cooling structure is included in the axial main cooling duct that forms in the cutter hub and is communicated with and cooling fluid is fed to the Cooling Holes of each described blade with described main cooling duct.
The technique effect of milling cutter of the present utility model is, on the basis that utilizes all tooth millings, can take full advantage of end tooth and strengthen milling, and this is very beneficial for the hard metals such as milling such as titanium alloy.And owing to be provided with internal cooling system, can effectively solve sticking cutter problem, be applicable to the large material of poor thermal conductivity, coefficient of friction such as the processing of titanium alloy.
According to further preferred scheme, internal cooling system of the present utility model comprise for the cooling fluid supply to all tooth Cooling Holes of described all teeth and be used for the end tooth Cooling Holes of cooling fluid supply to described end tooth.Tooth Cooling Holes can vertically or favour the main cooling duct of extending vertically and arranged in week this.And the end tooth Cooling Holes preferably has the minimum diameter less than the minimum diameter of described all tooth Cooling Holes, and the angle between described end tooth Cooling Holes and the described all tooth Cooling Holes is less than or equal to 90 °.So preferred cooling system can provide very effective cooling.
In order to take full advantage of the cutting ability of end tooth, end tooth can be diametrically tilts to extend and limits re-entrant angle in the end tooth towards described central axis and cutter hub, and re-entrant angle is in 0-1.5 ° scope in the described end tooth.
And for the intensity that guarantees cutter tooth and guarantee machining accuracy, preferably be connected circular arc with the connecting portion setting of all teeth at end tooth, connect the connection arc radius that circular arc preferably has 3mm-5mm.
According to the further embodiment of the utility model, described all teeth have all tooth cutting edges, all tooth rake faces before this tooth cutting edge in week and be arranged in successively this cutting edge after all tooth cylinder lands and all angle of back of tooths section, described all tooth rake faces have the anterior angle in 3 ° of-6 ° of scopes, described all tooth cylinder lands have the width less than or equal to 0.05mm, and described all angle of back of tooth section has all angle of back of tooths more than or equal to 18 °.
According to preferred embodiment of the utility model, described end tooth limits an end tooth cutting edge, described end tooth also has the first rear bight and the second rear bight that is positioned at after the described end tooth cutting edge, wherein the first rear bight has the first relief angle of 0 ° and has width less than or equal to 0.05mm, and the described second rear bight has the second relief angle more than or equal to 12 °.
For so that end tooth of the present utility model can provide larger, more effective cutting force, described tooth base and blade are in tilted layout with respect to described central axis and limit helix angle in 3 °-6 ° scope, this helix angle and then define the anterior angle of end tooth.
Other feature and advantage parts of the present utility model will be that those skilled in the art are obvious after having read the utility model, and another part will embody in the specific embodiment hereinafter.
Description of drawings
Below, describe by reference to the accompanying drawings embodiment of the present utility model in detail, wherein:
Fig. 1 shows an embodiment according to polycrystalline diamond milling cutter of the present utility model;
Fig. 2 A shows the end-view of the milling cutter of Fig. 1, has wherein shown an embodiment of the cooling structure of this milling cutter;
Fig. 2 B is the part zoomed-in view of Fig. 2 A, shows particularly all teeth of the polycrystalline diamond blade of milling cutter;
Fig. 3 shows another embodiment according to polycrystalline diamond milling cutter of the present utility model;
Fig. 4 shows the another embodiment according to polycrystalline diamond milling cutter of the present utility model.
The 1-cutter hub; The 2-blade; 3-master cooling duct; 4-week tooth; The 5-end tooth; 6-week tooth Cooling Holes; The but hole exits of laughing somebody to scorn in 7-week; 8-end tooth Cooling Holes; The A-part; O-O '-central axis; The 9-type of tamper evidence; 10-tooth base; 11-week tooth rake face; 12-week tooth cylinder land; 13-week tooth cutting edge; 14-end tooth rake face; 15-end tooth the first rear bight; 16-end tooth cutting edge.
In specification of the present utility model and accompanying drawing, identical or close accompanying drawing will represent identical or close feature or member.
The specific embodiment
The exemplary scheme of milling cutter of the present utility model is now described with reference to the following specific embodiment by reference to the accompanying drawings.Although it is in order to present embodiments more of the present utility model that accompanying drawing is provided, accompanying drawing needn't be drawn by concrete size, and some feature can be exaggerated, removes or dissect to illustrate better the utility model.
In addition, unless otherwise specified, some directional terminology in the utility model will be as the criterion according to those skilled in the art's understanding.For example, determine " front " and " afterwards " position in the parts of milling cutter according to the direction of rotation of milling cutter.In addition, restriction about " axially ", " radially " and " circumferentially ", bearing of trend that it is generally acknowledged the central axis of milling cutter is axially, and the direction through axis of rotation in plane perpendicular to axial direction can be considered radially, will regard as circumferentially around this axis of rotation or axial direction.
Fig. 1 is the front view for an embodiment of polycrystalline diamond (PCD) milling cutter of titanium alloy processing, but this milling cutter also goes for the processing of other material, such as the processing of other hard metal forming face.This milling cutter totally is the rotating cylindrical milling cutter form around central axis O-O ', and this milling cutter has a milling cutter diameter D, that is to say the working diameter of this milling cutter.As shown in the figure, milling cutter comprises the carbide alloy cutter hub 1 that totally extends along central axis O-O ', a plurality of tooth bases 10 that have a plurality of parallel interval integrally formed on cutter hub 1 to arrange on it.As is known to persons skilled in the art, between two adjacent tooth bases, can form chip area.Be fixed with a polycrystalline diamond (PCD) blade 2 on each tooth base 10.The bearing of trend of this blade 2 is basically identical with corresponding tooth base 10.
As is known to persons skilled in the art, blade 2 limit can by milling cutter around the revolution of central axis O-O ' cutting workpiece all teeth 4 of the forming face of titanium alloy for example vertically, and should week tooth 4 be included in the edge limited all tooth cutting edges 13 that go out of the outermost radial outside of blade 2.Theoretically, adding man-hour, cutting edge will be the part that contacts at first forming face to be processed.
In conjunction with Fig. 1, Fig. 2 A and 2B, this in week tooth cutting edge 13 bearing of trend basic consistent with the bearing of trend of tooth base 10 or blade 2, namely slightly favour axial.As shown in the figure, before this tooth cutting edge 13, in all teeth 4 of blade 2, limit rake face 11 in week.As shown in the figure, work centre axis and the cutting edge angle between line and the rake face in cross section is restricted to anterior angle γ.For titanium alloy processing, preferred anterior angle γ is in about 3 °-about 6 ° scope, preferably in greater than 5 °-6 ° scope.Immediately following all tooth cutting edges 13 after, being provided be used to preventing that all teeth from beating, guarantee all tooth intensity and mill out all tooth cylinder lands 12 of the roughness on surface that it preferably has the width b less than or equal to about 0.05mm.One or more all angle of back of tooth section (not shown) can be set after all tooth cylinder lands 12.Relief angle quality award from the ministry choosing in an illustrated embodiment has more than or equal to about 18 °, best about 18 °-20 ° all angle of back of tooth α, this advantageously guarantees dodging after the processing in titanium alloy processing, prevent from rubbing between rear knife face or cutter hub and the workpiece to be machined surface and affect the roughness on workpiece to be machined surface.People will understand, will be according to aforesaid definition in the 'fornt', 'back' of this indication.According to above-mentioned restriction, during all tooth cutting edge 13 cutting workpieces, all tooth rake faces 11 are towards surface of the work to be processed, and then the bight is towards the surface of the work of having processed.
Further, for the processing of titanium alloy, these blade 2 preferred axes to the end that extends beyond described cutter hub to form end tooth 5.That is to say that this end tooth 5 is positioned on the end face of milling cutter.As shown in Figure 1, end tooth 5 has the end tooth cutting edge 16 that basically radially extends.Particularly, the partial cross section figure of end tooth 5 has been shown in part A, it is along intercepting in the plane that is in substantially parallel relationship to central axis O-O '.Shown in this part A, be similar to aforementioned all teeth 4, end tooth 5 also comprises the end tooth rake face 14 that is positioned at before the end tooth cutting edge 16.This end tooth rake face 14 has an anterior angle (not shown), and it is determined with respect to the helix angle β that center O-O ' axis tilts by tooth base 10 or blade 2.In other words, end tooth rake face 14 and all tooth rake faces 11 are on the same plane on the blade, and this plane for example is that Reference numeral 4 and 5 blade face that limit and surround are namely among Fig. 1.The inventor finds, for titanium alloy processing, helix angle β is particularly advantageous in about 3 °-about 6 ° scope, like this will be so that end tooth has suitable anterior angle, to have suitable cutting force and intensity.Be end tooth the first rear bight 15 of 0 ° immediately following also be provided with relief angle end tooth cutting edge 16 after, it preferably has less than or equal to the about width b1 of 0.05mm, mills out surperficial roughness with intensity and the end tooth that guarantees end tooth.Also be provided with the second rear bight (not shown) after end tooth the first rear bight 15, this second rear bight preferably has the end tooth relief angle α 1 more than or equal to 12 °, and its effect mainly is chip removal and dodges.
The inventor finds between all teeth 4 and end tooth 5, particularly arranges to be connected circular arc and to be particularly conducive to assurance cutter tooth intensity between the cutting edge of all teeth and end tooth.And this connection circular arc preferably has the connection arc radius R of 3mm-5mm.
In addition, as shown in Figure 1, end tooth 5 tilts to extend (depression) and limits whereby re-entrant angle К in the end tooth towards central axis and cutter hub diametrically.According to preferred embodiment of the present utility model, re-entrant angle К is preferably in the about 1.5 ° scope of about 1-in the about 1.5 ° scope of 0-in the described end tooth.By the utility model end tooth 5 is set so, and and then re-entrant angle К in this depression such as the end tooth is set, the working ability that it can advantageously utilize end tooth is particularly suitable for the processing of the higher titanium alloy of this hardness, for example Milling of Titanium Alloy and guarantee that end tooth mills out the roughness on surface effectively.
By means of above structure, during work, milling cutter rotates take central axis O-O ' as the work gyroaxis, and do simultaneously perpendicular to gyroaxis to or low dip in gyroaxis to the feed motion of carrying out interpolation, thereby mill out the workpiece to be machined surface by means of all teeth 4 and the end tooth 5 of PCD blade 2 for sword.
Continuation is with reference to figure 1, and for titanium alloy poor thermal conductivity, the easy problem of sticking cutter, this milling cutter also is provided with integrally formed therein interior cooling structure.In the embodiment shown in fig. 1, described interior cooling structure comprises the main cooling duct 3 of extending along central axis, this main cooling duct 3 is limited by the through hole that extends along central axis, and is provided with a type of tamper evidence at the end of through hole, and cooling fluid enters from the near-end of through hole.In addition, in this cooling structure also comprise be communicated with described main cooling duct 3 and cooling fluid to be fed to all tooth Cooling Holes 6(Fig. 1 of all teeth 4 of blade 2 not shown).As shown in the figure, described Cooling Holes 6 is substantially perpendicular to main cooling duct 3, and the outlet 7 of all tooth Cooling Holes 6 is configured to all teeth 4 with cooling fluid guide blade 2.
Next with reference to figure 3, it shows another embodiment of milling cutter.Be similar to the embodiment of Fig. 1, this blade of blade 2(that this milling cutter comprises rigidity cutter hub 1, tooth base 10, be arranged on the tooth base is shorter than blade shown in Figure 1) and cooling structure.This cooling structure comprises the main cooling duct 3 of extending vertically and a plurality of all tooth Cooling Holes 6 that are communicated with these main cooling duct 3 fluids.This, tooth Cooling Holes 6 had corresponding outlet 7 in week.But be with the main distinction of Fig. 1, this in week tooth Cooling Holes 6 be obliquely installed with respect to main cooling duct 3, and this be in tilted layout so that the corner that fluid is relayed to all tooth Cooling Holes 6 in main cooling duct 3 less than 90 °, for example corner t is about 30 °-Yue 60 °.It is particularly favourable arranging like this for accommodating fluid reposefully.
As shown in Figure 4, it shows according to a particularly preferred embodiment of the present utility model.This embodiment totally is similar to embodiment shown in Figure 3, but difference is that an end of the main cooling duct among the embodiment of Fig. 4 does not stop up, but is communicated with the end tooth Cooling Holes 8 of almost coaxial layout.In titanium alloy processing, such end tooth Cooling Holes 8 and to arrange accordingly be very favorable for the cutting power that takes full advantage of end tooth.According to further favourable setting, the angle between best all tooth Cooling Holes 6 and the end tooth Cooling Holes 8 is less than 90 °, and is preferably in 10 ° of-60 ° of scopes, more preferably in 15 ° of-60 ° of scopes.Preferably, the minimum flow area of described end tooth Cooling Holes 8 should be less than the minimum flow area of all tooth Cooling Holes 6, for example for its ratio is 3/4,1/2,1/3,1/4,1/5, and any subrange between these values.The end tooth that so arranges and all tooth Cooling Holes can and suitably balance be fed to respectively the cool stream scale of construction of end tooth and all teeth.End tooth Cooling Holes 8 as shown in the figure is one, but can expect in another favourable embodiment, arrange a plurality of, and for example can be similar to the arrangement form of all tooth Cooling Holes 6 of Fig. 3 or 4, namely favour main cooling duct 3 and be supplied to each end tooth 4, like this setting also effectively balance be fed to the cool stream scale of construction of end tooth and all teeth.In addition, although end tooth Cooling Holes 8 as shown in the figure such as has at the large diameter, can be towards the form of the terminal reaming of milling cutter.
Now by preferred embodiment of the present utility model has been described with reference to the drawings, but should be understood that thought of the present utility model and scope are not limited to shown embodiment but by the scope of appending claims and be equal to and limit.
Claims (10)
- One kind be used for the face that shapes around the rotating milling cutter of central axis, comprising: rigidity cutter hub (1), this cutter hub have at least two tooth bases (10) that parallel interval is arranged; With the polycrystalline diamond blade (2) that is separately fixed on each tooth base, the outermost radial outside of described polycrystalline diamond blade (2) limits all teeth (4), and described polycrystalline diamond blade (2) extends axially the end that exceeds described rigidity cutter hub (1) to form end tooth (5), wherein, this milling cutter also comprises cooling structure, described cooling structure is included in the axial main cooling duct (3) that forms in the cutter hub and is communicated with and cooling fluid is fed to the Cooling Holes (6,8) of each described blade (2) with described main cooling duct (3).
- 2. milling cutter according to claim 1 is characterized in that, described Cooling Holes (6,8) comprises for all tooth Cooling Holes (6) of cooling fluid supply to described all teeth (4).
- 3. milling cutter according to claim 2 is characterized in that, described all tooth Cooling Holes (6) are vertical or favour described main cooling duct (3) and arrange.
- 4. according to claim 2 or 3 described milling cutters, it is characterized in that, described Cooling Holes (6,8) comprise for the end tooth Cooling Holes (8) of cooling fluid supply to described end tooth (5), wherein, described end tooth Cooling Holes (8) has the minimum flow area less than the minimum flow area of described all tooth Cooling Holes (6), and the angle between described all tooth Cooling Holes (6) and the described end tooth Cooling Holes (8) is less than or equal to 90 °.
- 5. milling cutter according to claim 1, it is characterized in that, described end tooth (5) tilts to extend and limits re-entrant angle (К) in the end tooth towards described central axis (O-O ') and cutter hub (1) diametrically, and re-entrant angle (К) is in 0-1.5 ° scope in the described end tooth.
- 6. milling cutter according to claim 1 is characterized in that, described all teeth (4) link to each other with described end tooth (5) and have the circular arc of connection at connecting portion, and described connection circular arc has the connection arc radius (R) of 3mm-5mm.
- 7. milling cutter according to claim 1, it is characterized in that, described all teeth (4) have all tooth cutting edges (13), this week tooth cutting edge (13) before all tooth rake faces (11) and be arranged in successively this week tooth cutting edge (13) all tooth cylinder lands (12) and all angle of back of tooths section afterwards, described all tooth rake faces (11) have the anterior angle (γ) in 3 ° of-6 ° of scopes, described all tooth cylinder lands (12) have the width (b) less than or equal to 0.05mm, and described all angle of back of tooth section has all angle of back of tooths (α) more than or equal to 18 °.
- 8. milling cutter according to claim 7, it is characterized in that, described end tooth (5) limits an end tooth cutting edge (16), be positioned at described end tooth cutting edge (16) the first rear bight (15) and the second rear bight afterwards, wherein the first rear bight (15) has the first relief angle of 0 ° and has width less than or equal to 0.05mm, and the described second rear bight has the second relief angle (α 1) more than or equal to 12 °.
- 9. according to claim 1 or 8 described milling cutters, it is characterized in that described tooth base (10) and blade (2) are in tilted layout with respect to described central axis and limit helix angle (β), described helix angle (β) is in 3 °-6 ° scope.
- 10. milling cutter according to claim 1 is characterized in that, described milling cutter is the milling cutter that is exclusively used in titanium alloy processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220494881 CN202804305U (en) | 2012-09-26 | 2012-09-26 | Polycrystalline diamond milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220494881 CN202804305U (en) | 2012-09-26 | 2012-09-26 | Polycrystalline diamond milling cutter |
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| Publication Number | Publication Date |
|---|---|
| CN202804305U true CN202804305U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220494881 Expired - Lifetime CN202804305U (en) | 2012-09-26 | 2012-09-26 | Polycrystalline diamond milling cutter |
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| CN (1) | CN202804305U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658795A (en) * | 2012-09-26 | 2014-03-26 | 深圳市中天精密工具有限公司 | Polycrystalline diamond milling cutter |
| CN104368858A (en) * | 2014-09-25 | 2015-02-25 | 崔仁成 | Ball-end milling cutter with carbide blades, and its milling method |
| CN106424887A (en) * | 2016-11-11 | 2017-02-22 | 苏州领裕电子科技有限公司 | Milling tool |
| CN109551028A (en) * | 2019-01-15 | 2019-04-02 | 深圳市航天精密刀具有限公司 | A kind of PCD screw cutter that the high-efficiency milling for titanium alloy is considered to be worth doing |
| CN109746497A (en) * | 2019-01-07 | 2019-05-14 | 广东优能特五金科技有限公司 | A kind of bloom milling cutter and the polishing method for being polished to the bloom milling cutter |
-
2012
- 2012-09-26 CN CN 201220494881 patent/CN202804305U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658795A (en) * | 2012-09-26 | 2014-03-26 | 深圳市中天精密工具有限公司 | Polycrystalline diamond milling cutter |
| CN103658795B (en) * | 2012-09-26 | 2016-06-08 | 深圳市中天精密工具有限公司 | A kind of for process forming face around the pivotal milling cutter of center axis |
| CN104368858A (en) * | 2014-09-25 | 2015-02-25 | 崔仁成 | Ball-end milling cutter with carbide blades, and its milling method |
| CN106424887A (en) * | 2016-11-11 | 2017-02-22 | 苏州领裕电子科技有限公司 | Milling tool |
| CN109746497A (en) * | 2019-01-07 | 2019-05-14 | 广东优能特五金科技有限公司 | A kind of bloom milling cutter and the polishing method for being polished to the bloom milling cutter |
| CN109551028A (en) * | 2019-01-15 | 2019-04-02 | 深圳市航天精密刀具有限公司 | A kind of PCD screw cutter that the high-efficiency milling for titanium alloy is considered to be worth doing |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN JUNTEC ULTRA-HARD TOOLS CO., LTD. Free format text: FORMER NAME: SHENZHEN JUNTEC PRECISION TOOLS CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 518101 Guangdong city of Shenzhen province Baoan District Xin'an 67 District Liu Xian Road Jiaan Science Park No. 2 building two floor Patentee after: JUNTEC ULTRA-HARD TOOLS Co.,Ltd. Address before: 518101 Guangdong city of Shenzhen province Shenzhen Baoan District Xin'an 67 District Liu Xian Road Jiaan Science Park No. 2 building two floor Patentee before: SHENZHEN JUNTEC PRECISION TOOLS Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |