CN102528142A - Carbon film coated end mill and manufacturing method thereof - Google Patents
Carbon film coated end mill and manufacturing method thereof Download PDFInfo
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- CN102528142A CN102528142A CN2011104396574A CN201110439657A CN102528142A CN 102528142 A CN102528142 A CN 102528142A CN 2011104396574 A CN2011104396574 A CN 2011104396574A CN 201110439657 A CN201110439657 A CN 201110439657A CN 102528142 A CN102528142 A CN 102528142A
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Abstract
The present invention provides a carbon film coated end mill which is coated by carbon films such as diamond coating film and so on and has an edgier cutting edge than ever before. In addition, the present invention also provides a manufacturing method capable of manufacturing the end mill with a high precision. The carbon film coated end mill is characterized in that: concave surfaces are respectively formed on the carbon films at an area of a base body front mill surface and an area of a base body rear mill surface, the concave surfaces cross on a base body mill point to form carbon film mill points, a cross angle of the concave surfaces is less than an angle (theta0) formed by the base body front mill surface (2c) and the base body rear mill surface (2d).
Description
Technical field
The present invention relates to a kind ofly can process carbon film-coated slotting cutter and the manufacturing approach thereof that is cut material tartly.
Background technology
Coating by diamond film in the diamond coated cutting tool on cutting edge surface; Proposed the roughly arc sections that attrition process for example forms in the past on cutting edge, and become mode below 40 ° that the technology (with reference to patent documentation 1) of chamfering is set partly with the angle of arc sections roughly.And, the above-mentioned roughly arc sections of attrition process is also proposed, so that relief angle is less than the technology (with reference to patent documentation 2) of original angle.
In addition, the cutting edge in this specification represent to comprise the point of a knife of cutting element, the zone of the part of the part of the rake face that joins with point of a knife and the back knife face that joins with point of a knife.
As the Ginding process of above-mentioned diamond film coated cutting tool, the laser Ginding process that patent documentation 3 is put down in writing is proposed.In the focus (making it mobile) of this laser Ginding process scan laser on the surface of diamond overlay film, diamond overlay film itself is moved.Like this, through focus and the two relative motion of diamond overlay film that makes laser, remove the protuberance that is formed on diamond overlay film surface.In addition, the manufacturing approach of the machining tool put down in writing of patent documentation 4 to the diamond overlay film vertically illumination wavelength be that the laser of 266nm comes machining tool is processed.
Patent documentation 1: No. 3477182 communique of Japan Patent
Patent documentation 2: No. 3477183 communique of Japan Patent
Patent documentation 3: No. 3096943 communique of Japan Patent
Patent documentation 4: Japan Patent discloses the 2009-6436 communique
Leave following problem in the above-mentioned prior art.
The first, when forming cutting edge,, therefore in process, can produce the metamorphosis of emery wheel because diamond is harder than emery wheel through grinding.The result is difficult to carry out accurately required shape processing.
The second, the limit makes laser and diamond overlay film carry out the relative motion limit jointly to carry out moving of workpiece (being cut thing) that the scan laser method for processing further needs to carry out according to the form of processing object thing.Therefore, the Position Control of the focus of laser and diamond overlay film is more complicated.
Three, to the diamond overlay film vertically in the processing method of irradiating laser, the form after the processing is easy to reflect the undulations of overlay film before the processing.Therefore, the overlay film before the processing need form uniform diamond overlay film.So high-precision processing is difficult.
Four, when forming the diamond overlay film on the point of a knife at the cutting edge of slotting cutter etc., because corresponding to the thickness of diamond overlay film, overlay film swell formation on point of a knife, so is difficult to process point of a knife.Therefore, be difficult to make the slotting cutter that applies and have sharp cutting edge with the diamond overlay film in the past.
Summary of the invention
The present invention accomplishes in view of aforementioned problems; Its purpose is to provide a kind of carbon film-coated slotting cutter; It is by carbon film-coated such as diamond overlay films, and has than sharper in the past cutting edge, and a kind of manufacturing approach of this slotting cutter of processing and fabricating accurately is provided.
The present invention adopts following structure in order to solve said problem.That is, the carbon film-coated slotting cutter of first aspect of the present invention is characterized in that having: tool base has the matrix point of a knife and clips knife face behind matrix rake face that said matrix point of a knife adjoins each other and the matrix; And carbon film; Be formed on behind said matrix point of a knife, said matrix rake face and the said matrix on the knife face; On said carbon film; Zone on knife face behind zone on the said matrix rake face and the said matrix is formed with the concave surface to the concave surface of the rake face side of said tool base depression and back knife face side respectively; Thereby the concave surface of the concave surface of said rake face side and said back knife face side intersects on said matrix point of a knife and on said carbon film, forms the carbon film point of a knife, the angle that the concave surface of the concave surface of said rake face side and said back knife face side the intersects to form angle that knife face constituted after less than said matrix rake face and said matrix.
In this carbon film-coated slotting cutter, on the carbon film in the zone on the knife face behind zone on the matrix rake face and the matrix, be formed with the concave surface of the rake face side that caves in to tool base and the concave surface of back knife face side respectively.And then, the concave surface of the concave surface of rake face side and back knife face side on the matrix point of a knife, intersects and on carbon film formation carbon film point of a knife.And then, the angle that the concave surface of the concave surface of rake face side and back knife face side the intersects to form angle that knife face constituted after less than matrix rake face and matrix.Through having above structure, above-mentioned carbon film-coated slotting cutter has than sharper in the past cutting edge.
That is, the carbon film surface of the part (cutting edge) through comprising the carbon film point of a knife subsides with respect to the elongated surfaces of rake face and back knife face and by concave surfaceization, thereby can form the carbon film of carbon film point of a knife shrilly.The result can access the sharper cutting edge of chamfering that forms than through existing method in above-mentioned carbon film-coated slotting cutter.
In above-mentioned carbon film-coated slotting cutter, said carbon film can be diamond film.
In addition, in above-mentioned carbon film-coated slotting cutter, can be circular shape by section with the concave surface of the concave surface of the formed said rake face side of face of said carbon film point of a knife quadrature and said back knife face side.
In addition, in above-mentioned carbon film-coated slotting cutter, the radius of curvature of the circular shape of the section of the concave surface of the concave surface of said rake face side and said back knife face side can be in the scope of 5 μ m to 3000 μ m.
In addition, in above-mentioned carbon film-coated slotting cutter, the concave surface of the concave surface of said rake face side and said back knife face side with said carbon film point of a knife quadrature and can be in the scope of 10 μ m to 2000 μ m along the width on the direction of separately face.
In addition, in above-mentioned carbon film-coated slotting cutter, the degree of depth of the concave surface 3a of the concave surface 3a of said rake face side and said back knife face side can be in the scope of 2 μ m to 15 μ m.
In addition; In above-mentioned carbon film-coated slotting cutter; The concave surface of the concave surface 3a of said rake face side and said back knife face side with the direction of carbon film point of a knife quadrature on width can be in the scope of 10 μ m to 2000 μ m, the degree of depth of the concave surface 3a of the concave surface 3a of said rake face side and said back knife face side can be in the scope of 2 μ m to 15 μ m.
The manufacturing approach of the carbon film-coated slotting cutter of second aspect of the present invention; Method for the carbon film-coated slotting cutter of making the invention described above; It is characterized in that; Have: the matrix preparatory process, prepare to have matrix point of a knife and the tool base that clips knife face behind matrix rake face that said matrix point of a knife adjoins each other and the matrix; Carbon film forms operation, on knife face behind the said matrix rake face of said tool base, the said matrix and said matrix point of a knife, forms carbon film; And Laser Processing operation; To said carbon film illuminating laser beam; Be processed to form the said carbon film in the zone on knife face behind zone on the said matrix rake face and the said matrix; Thereby form the concave surface of rake face side and the concave surface of back knife face side in rake face side and back knife face side respectively; Said rake face side is intersected on said matrix point of a knife and is formed the carbon film point of a knife with the said concave surface of knife face side afterwards, and in said Laser Processing operation, the light distribution on the beam profile of said laser beam is rendered as Gaussian distribution; The said carbon film of near said rake face side from said carbon film point of a knife the place ahead said carbon film point of a knife or said back knife face side shines said laser beam, and said laser beam scans along the bearing of trend of said carbon film point of a knife.
The manufacturing approach of this carbon film-coated slotting cutter is in the Laser Processing operation; Light distribution on the beam profile of laser beam is rendered as Gaussian distribution; And the carbon film illuminating laser beam of near rake face side from carbon film point of a knife the place ahead the carbon film point of a knife or back knife face side, thereby this laser beam scans along the bearing of trend of carbon film point of a knife and forms said concave surface.The result is, when observing with the section of carbon film point of a knife quadrature, is rendered as circular shape through the excision trace from the formed carbon film of laser beam of the place ahead irradiation of carbon film point of a knife, and can forms said concave surface accurately along the carbon film point of a knife.In addition, because the outer circumferential side of laser beam is contacted with the leading section (cutting edge part) of carbon film, therefore compares and to reduce power (intensity) density of laser beam at this leading section with the central part of laser beam.The leading section that consequently can prevent carbon film is too excised and is become the obtuse angle.
The manufacturing approach of above-mentioned carbon film-coated slotting cutter forms in the operation at said carbon film, can apply through the CVD film forming, said carbon film is formed than other parts on said matrix point of a knife swell more.
The manufacturing approach of above-mentioned carbon film-coated slotting cutter through carbon film being pre-formed for swelling more than other parts, thereby can be provided with the chipping allowance of the carbon film in the Laser Processing operation significantly on the matrix point of a knife in carbon film forms operation.Therefore, the manufacturing approach of this carbon film-coated slotting cutter can form darker concave surface and sharper cutting edge.In addition and since rake face and back knife face these two faces near the matrix point of a knife be the position that carbon film is grown up easily, so can swell more through utilizing the CVD film forming carbon film partly to be formed than other parts at cutting edge than heavy back coating carbon film.
In the manufacturing approach of above-mentioned carbon film-coated slotting cutter, said carbon film can be diamond film, and the wavelength of said laser beam can be below the 360nm.
In the manufacturing approach of this carbon film-coated slotting cutter, be below the 360nm because carbon film is the wavelength of diamond film and laser beam, therefore can further process diamond film accurately through laser beam with the wavelength that is suitable for diamond machined.
According to aspects of the present invention, realize following effect.
In the carbon film-coated slotting cutter of first aspect of the present invention, on the carbon film in the zone on the knife face behind zone on the matrix rake face and the matrix, be formed with the concave surface of the rake face side that caves in to tool base and the concave surface of back knife face side respectively.And then, the concave surface of the concave surface of rake face side and back knife face side on the matrix point of a knife, intersects and on carbon film formation carbon film point of a knife.And then, the angle that the concave surface of the concave surface of rake face side and back knife face side the intersects angle that knife face constituted after less than matrix rake face and matrix.Through having above structure, above-mentioned carbon film-coated slotting cutter can have than sharper in the past cutting edge.
In addition; The manufacturing approach of carbon film-coated slotting cutter according to a second aspect of the invention; Because in the Laser Processing operation; Light distribution on the beam profile of laser beam is rendered as Gaussian distribution, and from the place ahead of carbon film point of a knife the carbon film illuminating laser beam of near the rake face side the carbon film point of a knife or back knife face side, thereby this laser beam scans along the bearing of trend of carbon film point of a knife and forms said concave surface; Therefore can form said concave surface accurately along the carbon film point of a knife, and can form sharp cutting edge.
Therefore, carbon film-coated slotting cutter of the present invention and the carbon film-coated slotting cutter that utilizes above-mentioned method for making to make, the excellent in abrasion resistance that not only carbon film brought, and also sharpness is also very excellent, also is suitable for the slotting cutter as nonferrous metal and composite processing usefulness.
Description of drawings
Fig. 1 is illustrated in the embodiment of carbon film-coated slotting cutter of the present invention and manufacturing approach thereof the amplification view of the major part of the cutting edge of carbon film-coated slotting cutter and Laser Processing operation.
Fig. 2 A is the side view of the carbon film-coated slotting cutter of this embodiment of expression.
Fig. 2 B is the front view of blade of the carbon film-coated slotting cutter of this embodiment of expression.
Fig. 3 is the schematic overall structure figure of the employed laser processing device of manufacturing approach of the carbon film-coated slotting cutter of this embodiment of expression.
Fig. 4 is illustrated in the key diagram that concerns between the section shape of scanning direction and laser beam of laser beam in this embodiment.
Fig. 5 is illustrated in the sketch map that passes through the excision trace of the formed carbon film of laser beam in this embodiment.
Fig. 6 is illustrated among the embodiment of carbon film-coated slotting cutter of the present invention and manufacturing approach thereof the amplification view of the major part of the carbon film-coated slotting cutter when the Laser Processing operation.
Fig. 7 A is the front view of blade of the carbon film slotting cutter of this embodiment.
Fig. 7 B is the side view of blade of the carbon film slotting cutter of this embodiment.
Fig. 8 A is the carbon film slotting cutter as this embodiment, and the sword number is the front view of blade of two carbon film slotting cutter.
Fig. 8 B is the carbon film slotting cutter as this embodiment, and the sword number is the front view of blade of three carbon film slotting cutter.
Fig. 8 C is the carbon film slotting cutter as this embodiment, and the sword number is the front view of blade of four carbon film slotting cutter.
Fig. 8 D is the carbon film slotting cutter as this embodiment, and the sword number is the front view of blade of six carbon film slotting cutter.
Symbol description
1 carbon film-coated slotting cutter
2 tool base
The 2a cutting edge
2b matrix point of a knife
2c matrix rake face
Knife face behind the 2d matrix
3 carbon films
The 3a concave surface
3b carbon film point of a knife
The 4a rake face
Knife face behind the 4b
The angle that knife face constituted behind θ 0 matrix rake face and the matrix
The angle that θ 1 is intersected to form by the concave surface of the concave surface of rake face side and back knife face side
The specific embodiment
Below, referring to figs. 1 through Fig. 8 one embodiment of carbon film-coated slotting cutter of the present invention and manufacturing approach thereof is described.In addition, have in each accompanying drawing that in following explanation, uses in order each parts to be become to discern or the size of identification easily and suitably change the part of engineer's scale as required.
As shown in Figure 1, the carbon film-coated slotting cutter of this embodiment 1 is for being formed with the slotting cutter of carbon film 3 on knife face 2d and matrix point of a knife 2b behind the matrix rake face 2c of tool base 2, the matrix.In this carbon film-coated slotting cutter 1, be formed with behind zone on the matrix rake face 2c and said matrix the zone on the knife face 2d on the carbon film 3 respectively to the concave surface 3a of the rake face side of said tool base 2 depressions and the concave surface 3a of back knife face side.In addition, the concave surface 3a of the concave surface 3a of rake face side and back knife face side intersects on matrix point of a knife 2b, thereby on carbon film 3, forms carbon film point of a knife 3b.In addition, the angle θ 1 that intersects of the concave surface 3a of the concave surface 3a of rake face side and back knife face side less than matrix rake face 2c and matrix after the angle θ 0 that constituted of knife face 2d.
Shown in Fig. 2 A and Fig. 2 B, this carbon film-coated slotting cutter 1 for example possesses the 1a of handle of a knife portion and has the blade 1b of the three sword carbon film point of a knife 3b of the front of being arranged on.
Shown in Fig. 7 A, Fig. 7 B, Fig. 8 A, Fig. 8 B, Fig. 8 C and Fig. 8 D, the blade 1b of this carbon film-coated slotting cutter 1 also can have two point of a knife 3b to six swords.
In this carbon film-coated slotting cutter 1, the thickness of carbon film 3 is not particularly limited, but is preferably 5 to 50 μ m, more preferably 8 to 20 μ m.
Above-mentioned tool base 2 is formed by the carbide alloy of for example WC (tungsten carbide) etc.Above-mentioned carbon film 3 becomes film formed diamond film, graphite film or DLC (DLC) film etc. for utilizing CVD (chemical vapour deposition technique) etc.
On the surface of the surface of the carbon film 3 of adjacent rake face 4a side and the carbon film 3 of back knife face 4b side, be formed with respectively as stated to the concave surface 3a of the rake face side of tool base depression and the concave surface 3a of back knife face side.And the crest line with carbon film point of a knife 3b between the surface of the concave surface 3a of these rake faces 4a side and back knife face 4b side is that the border is in contact with one another.
Therefore; Angle θ 1 that the concave surface 3a by the concave surface 3a of said rake face side and said back knife face side of the front end (cutting edge, carbon film point of a knife 3b) of the carbon film 3 on the border that is formed at this a pair of concave surface 3a intersects to form (with the face of rake face 4a and back knife face 4b quadrature in section on the front end angle of carbon film point of a knife 3b) be processed into less than matrix rake face 2c and matrix by shape after the angle θ 0 that constituted of knife face 2d.In other words, the carbon film 3 that is coated on the matrix 2 is processed into " θ 1＜θ 0 ".In addition, it is below the 2 μ m that the leading section that is formed on the carbon film 3 on the carbon film point of a knife 3b is processed into radius of curvature.
The preferred radius of curvature of concave surface is according to the size of slotting cutter and difference, but when end mill diameters was 0.5～20mm, radius of curvature was preferably in the scope of 5 μ m to 3000 μ m.Further preferred radius of curvature is 15 μ m to 300 μ m.
With the direction of the bearing of trend quadrature of carbon film point of a knife on the width of above-mentioned concave surface according to the size of slotting cutter and different, but when end mill diameters was 0.5～20mm, the width of concave surface was preferably in the scope of 10 μ m to 2000 μ m.The width of further preferred concave surface is 20 μ m to 1000 μ m.。
The degree of depth of above-mentioned concave surface is according to the size of slotting cutter and difference, but when end mill diameters was 0.5～20mm, the degree of depth of concave surface was preferably in the scope of 2 μ m to 15 μ m.The degree of depth of further preferred concave surface is 2 μ m to 10 μ m.
In Fig. 2, as the slotting cutter of embodiment of the present invention the sword number being shown is three slotting cutter, but only otherwise can produce obstacle to the use as slotting cutter, the sword number is not particularly limited in three.For example, shown in Fig. 8 A to Fig. 8 D, also can be that the sword number is the slotting cutter beyond three.Sword number shown in Fig. 8 A is the front view of two slotting cutter.Sword number shown in Fig. 8 B is the front view of three slotting cutter.Sword number shown in Fig. 8 C is the front view of four slotting cutter.Sword number shown in Fig. 8 D is the front view of six slotting cutter.
Next, referring to figs. 1 through Fig. 5, the method for the carbon film-coated slotting cutter of making this embodiment is described.
The manufacturing approach of the carbon film-coated slotting cutter 1 of this embodiment has: the matrix preparatory process, prepare to have matrix point of a knife 2b and the tool base 2 that clips knife face 2d behind matrix rake face 2c that said matrix point of a knife 2b adjoins each other and the matrix; Carbon film forms operation, on knife face 2d behind the said matrix rake face 2c of said tool base 2, the said matrix and said matrix point of a knife 2b, forms carbon film; And Laser Processing operation; To said carbon film 3 illuminating laser beams; Be processed to form the said carbon film 3 in the zone on knife face 2d behind zone on the said matrix rake face 2c and the said matrix, to form the concave surface 3a of rake face side and the concave surface 3a of back knife face side respectively in rake face side and back knife face side.
As shown in Figure 5, form in the operation at above-mentioned carbon film, carbon film 3 is pre-formed to swelling more than other parts on matrix point of a knife 2b.The matrix point of a knife 2b of these two face adjacency of knife face 2d goes up the position of growing up easily for the carbon film 3 that forms through chemical vapor deposition (CVD) behind matrix rake face 2c and the matrix.Therefore, through applying carbon film 3 than heavy back by the CVD film forming, can be as shown in Figure 5, carbon film 3 formed than other parts on matrix point of a knife 2b swell more.
The laser processing device 21 that in above-mentioned Laser Processing operation, uses is the device through carbon film 3 illuminating laser beams (laser) L that is coated on the tool base 2 is processed as shown in Figure 3.This laser processing device 21 possesses: laser radiation mechanism 22, rotating mechanism 23, travel mechanism 24 and control part 25.Above-mentioned laser radiation mechanism 22 pulsed oscillation laser bundle L also shine carbon film 3 and in carbon film 3 enterprising line scannings with constant repetition rate.Above-mentioned rotating mechanism 23 has rotatable motor etc., and keeps the tool base 2 that coated by carbon film 3, and to give with the vertical milling cutter shaft to the machined object with slotting cutter shape be rotatablely moving of center.Upload in above-mentioned travel mechanism 24 and to be equipped with above-mentioned rotating mechanism 23.The position that changes said rotating mechanism under the state of putting above-mentioned rotating mechanism 23 can carried in this travel mechanism 24.Above-mentioned control part 25 is suitably controlled above-mentioned laser radiation mechanism 22, rotating mechanism 23 and travel mechanism 24 in order to carry out required Laser Processing.
Above-mentioned travel mechanism 24 possesses: can the edge arbitrarily direction parallel with horizontal plane be the X axle objective table 24x of portion that directions X moves; Can be the Y axle objective table 24y of portion that the Y direction moves along and with horizontal plane parallel direction vertical with respect to above-mentioned directions X; And can be the Z axle objective table 24z of portion that the Z direction moves along with respect to the horizontal plane vertical direction.The above-mentioned Y axle objective table 24y of portion is arranged on the above-mentioned X axle objective table 24x of portion.The above-mentioned Z axle objective table 24z of portion is arranged on the above-mentioned Y axle objective table 24y of portion.On this Z axle objective table 24z of portion, be fixed with above-mentioned rotating mechanism 23, and can keep tool base 2.
Above-mentioned laser radiation mechanism 22 possesses: LASER Light Source 26, galvanometer scanner 27 and CCD camera 28.Above-mentioned LASER Light Source 26 has the optical system that laser is pooled point-like, and vibrates through the triggering signal of Q-switch and to become the laser of laser beam L.Through above-mentioned galvanometer scanner 27, the carbon film of the laser beam L that is shone scanning machined object.The carbon film-coated tool base 2 that CCD camera 28 is taken under the held state.And, the Working position of affirmation tool base 2.
The laser beam L that is penetrated by this laser radiation mechanism 22 is a single mode, and the light distribution on beam profile is rendered as Gaussian distribution.That is, in above-mentioned section, mark arbitrary line, and when measuring the light intensity on this straight line through the center of above-mentioned beam profile, the strongest in the light intensity of central point, and along with towards two outsides of above-mentioned beam profile, light intensity decreasing.In addition, as shown in Figure 4, the beam profile in focal point is rendered as elliptical shape.
In addition, it is consistent with the long axis direction or the short-axis direction of oval-shaped beam profile that laser radiation mechanism 22 makes the scanning direction of laser beam L.This is because if the scanning direction of laser beam L is not consistent with the long axis direction or the short-axis direction of the beam profile with above-mentioned elliptical shape; And be tilt with respect to major axis or minor axis direction the time; Then can cause in the scanning end portion, machining shape tilts and produces skew.In addition, in this embodiment, make the scanning direction of laser beam L consistent with the short-axis direction of above-mentioned beam profile.
Above-mentioned LASER Light Source 26 can use the light source of the laser of arbitrary wavelength that can shine 190～550nm, for example in this embodiment, uses and can vibrate and penetrate the light source of wavelength as the laser (triple-frequency harmonics of Nd:YAG laser) of 355nm.
In addition, when carbon film 3 was diamond film, laser beam L used wavelength to be the ultraviolet laser below the 360nm.
The wavelength of the LASER Light Source 26 in the Laser Processing operation is 190～550nm more preferably.Further be preferably 190～360nm.
Above-mentioned galvanometer scanner 27 be configured in travel mechanism 24 directly over.In addition, above-mentioned CCD camera 28 is provided with galvanometer scanner 27 adjacency.
In above-mentioned Laser Processing operation; The light distribution of the carbon film 3 illumination beam sections of near rake face 4a side from the place ahead of matrix point of a knife 2b carbon film point of a knife 3b or back knife face 4b side is the laser beam L of Gaussian distribution, and then scans and form concave surface 3a along the bearing of trend of matrix point of a knife 2b.Here, the place ahead of matrix point of a knife 2b is meant in the instrument cutaway view of Fig. 5, and knife face behind matrix rake face and the matrix is intersected the bisecting line at the angle that the forms point on this extended line when extending to the outside of tool base.In addition, this extended line also can with matrix point of a knife 2b be fulcrum surpass 0 ° and less than 90 ° scope in behind matrix rake face side or matrix knife face lateral bending Qu Yanchang.In addition, the bearing of trend of matrix point of a knife 2b is meant in Fig. 5 the direction with the paper quadrature.
In addition, in the Laser Processing operation, from the place ahead illuminating laser beam L of matrix point of a knife 2b, control travel mechanism 24 or galvanometer scanner 27, for example with respect to rake face 4a or back knife face 4b with the angular illumination carbon film 3 below 20 °.In addition; Along the i.e. scanning direction laser beam L vertical in Fig. 1 of the bearing of trend of matrix point of a knife 2b with paper; And as shown in Figure 5, laser scanning line shines with grid-like (scan line of laser beam L is slided, and make the local overlapping state of scan line separately) more than the delegation and below ten row.In addition, according to optically focused angle or the focal position of laser beam L, suitably set the number of scan line.In this embodiment, thus since laser beam L touches tool base 2 before optically focused wall be difficult to therefore be set at below ten row to the irradiation of desirable position.
Therefore in this Laser Processing operation, because the light distribution on the beam profile of laser beam L has Gaussian distribution, the closer to the center of laser beam L; Intensity is high more, and the closer to the center of laser beam L, working depth is dark more; And the closer to periphery, working depth is shallow more.Therefore, the power density of laser beam L that is contacted with the front end (cutting edge part) of carbon film 3 will weaken.
In addition, according to carbon film 3, the structural change that diamond becomes amorphous carbon etc. might take place from about finished surface to the 1 μ m.
When cutting, bring into play function with the amorphous carbon layer that the thickness below the 1 μ m forms from finished surface, thereby have the effect of collapsing cutter of the cutting edge 3b that suppresses carbon film-coated slotting cutter 1 as elastic layer.
So in the carbon film-coated slotting cutter 1 of this embodiment, the zone behind zone on the matrix rake face 2c in carbon film 3 and the matrix on the knife face 2d is formed with the concave surface 3a to the concave surface 3a of the rake face side of tool base depression and back knife face side respectively.In addition, thus the concave surface 3a of the concave surface 3a of rake face side and back knife face side intersects formation carbon film point of a knife 3b on carbon film 3 on matrix point of a knife 2b.And, the angle θ 1 that the concave surface 3a of the concave surface 3a of rake face side and back knife face side intersects less than matrix rake face 2c and matrix after the angle θ 0 that constituted of knife face 2d.Through having said structure, the carbon film-coated slotting cutter 1 of this embodiment can have than sharper in the past cutting edge.That is, like Fig. 1 and shown in Figure 5, the surface of the carbon film 3 of rake face side that contacts with carbon film point of a knife 3b and back knife face side subsides with respect to the elongated surfaces of rake face 4a and back knife face 4b and by concave surfaceization.Therefore, the carbon film 3 of carbon film point of a knife 3b part is formed sharp-pointed shape, thereby can access sharper cutting edge with forming as compare during in the past chamfering.
In addition; The manufacturing approach of this carbon film-coated slotting cutter 1 is in the Laser Processing operation, and the light distribution near the carbon film 3 illumination beam sections of the place ahead of matrix point of a knife 2b rake face 4a side or back knife face 4b side carbon film point of a knife 3b is rendered as the laser beam L of Gaussian distribution.And, further scan above-mentioned laser beam L and form concave surface 3a through bearing of trend along matrix point of a knife 2b.Through having said structure; In the manufacturing approach of this carbon film-coated slotting cutter 1; As shown in Figure 5 and since from the place ahead of matrix point of a knife 2b the section of the excision trace of the formed carbon film 3 of laser beam L of irradiation be rendered as circular-arc, thereby can form concave surface 3a accurately along matrix point of a knife 2b.
In addition, because the outer circumferential side of laser beam L is contacted with the leading section (cutting edge part) of carbon film 3, therefore can reduce the power density of the laser beam L in this leading section.The leading section (cutting edge part) that consequently can prevent carbon film 3 is formed the obtuse angle by excision too.
And then, in carbon film forms operation, through carbon film 3 being pre-formed for swelling more, thereby the chipping allowance of the carbon film 3 in the Laser Processing operation can be set significantly on matrix point of a knife 2b than other parts.Consequently, can form darker concave surface 3a and sharper cutting edge through the manufacturing approach of this carbon film-coated slotting cutter 1.
[embodiment]
Next, with reference to the embodiment of Fig. 5 and Fig. 6 explanation through the carbon film-coated slotting cutter of the manufacturing approach actual fabrication of the carbon film-coated slotting cutter of above-mentioned embodiment.
In the present embodiment; Through can illumination wavelength being that 262nm (four times of ripples of Nd:YLF laser (first-harmonic: wavelength is 1047nm)), repetition rate are 10kHz, on average are output as the above-mentioned laser processing device of the laser of 0.1W; (focal distance f=150mm) converges laser by f θ lens; And use galvanometer scanner with the sweep speed of 25mm/s according to identical track scanning four times, thereby the cutting edge 2a of the slotting cutter 1 that will be implemented as carbon film 3 by the synthetic formed diamond overlay film of gas phase is made its sharp processing.
In addition; As preparation; As shown in Figure 6; Synthesize on the tool base 2 of carbide alloy system through gas phase that to form average film thickness be the diamond film of 17 μ m, and last to form diamond film with the mode thicker than average film thickness be carbon film 3 in the crest line portion (carbon film point of a knife 3b) that cutting edge 2a promptly is made up of back knife face 4b and rake face 4a.In addition, the membranous mensuration of carbon film is used Raman spectroscopy.
In addition, as stated, the part of cutting edge 2a is because the film forming position is more than the plane, so film forming has the diamond film (carbon film 3) of thicker and circular change.
For example, as shown in Figure 1, at first will be from the matrix point of a knife 2b of tool base 2 along rake face 4a the average carbon film thickness in the zone on the rake face 4a more than the distance 100 μ m be defined as average film thickness ta.Then, will be from matrix point of a knife 2b along rake face 4a distance 50 μ m be defined as average film thickness te with the average carbon film thickness in the zone on the interior rake face.The thick te of this average carbon film comprises the part of the part of the above-mentioned thicker and circular change before the Laser Processing.
In the present embodiment, above-mentioned average film thickness ta is made as more than the 5 μ m.Further, with the mode film forming diamond film of the relation that becomes " te＞ta ".
Then, rake face 4a and back knife face 4b are tilted 10 ° with respect to the direction of illumination of laser beam L, and from the crest line of all directions and matrix point of a knife 2b scanning laser beam L abreast.In the case, laser beam L scans with the bearing of trend of the final carbon film point of a knife 3b that forms abreast.As shown in Figure 5, initial laser beam irradiation target location P1 is set in from the surperficial intersection point of the carbon film of the extended line 4d of the average height (part that does not comprise thicker and circularization of the part that is formed on cutting edge 2a) of rake face 4a and back knife face 4b, 4c and thicker and circularization of cutting edge 2a part 3 to the squint position of 4 μ m, the outside of carbon film point of a knife 3b.
In the carbon film-coated slotting cutter 1 that so uses above-mentioned manufacturing approach to make, when the anterior angle of tool base 2 was 19 °, in the carbon film-coated slotting cutter 1 that forms in that carbon film 3 is carried out Laser Processing, anterior angle was 21 °, and anterior angle keeps bigger angle.
Carbon film-coated slotting cutter to embodiments of the invention carries out cutting test, and table 1 illustrates the result of the surface roughness Rz (maximum height) that measures machined surface.In addition, as comparative example, in table 1, illustrate in the lump carry out the result of same mensuration without the slotting cutter in the past by carbon film (diamond film) coating of Laser Processing.In addition, aluminium alloy A7075 is used as workpiece (being cut thing), machining condition is as shown in table 1.
[table 1]
Can know from this result; The surface roughness Rz of the carbon film-coated slotting cutter of comparative example is 3 μ m, and therewith relatively, the surface roughness Rz of the carbon film-coated slotting cutter of present embodiment is 0.5 μ m; Surface roughness significantly reduces, and can more flatly carry out cut.
In addition, technical scope of the present invention is not limited to above-mentioned embodiment, in the scope that does not break away from aim of the present invention, can carry out various changes.
Because carbon film-coated slotting cutter of the present invention has sharp point of a knife shape, therefore reduced cutting resistance.The result prolongs the service life of this carbon film-coated slotting cutter.
Claims (10)
1. a carbon film-coated slotting cutter (1) is characterized in that having:
Tool base (2), have matrix point of a knife (2b) and clip matrix rake face (2c) that said matrix point of a knife (2b) adjoins each other and matrix after knife face (2d); And
Carbon film (3) is formed on behind said matrix point of a knife (2b), said matrix rake face (2c) and the said matrix on the knife face (2d),
On said carbon film (3), the zone on knife face (2d) behind zone on the said matrix rake face (2c) and the said matrix is formed with the concave surface (3a) to the concave surface (3a) of the rake face side of said tool base depression and back knife face side respectively,
The concave surface of concave surface of said rake face side (3a) and said back knife face side is gone up at said matrix point of a knife (2b) and is intersected, thereby goes up formation carbon film point of a knife (3b) at said carbon film (3),
The angle (θ 0) that the angle (θ 1) that the concave surface (3a) of the concave surface of said rake face side (3a) and said back knife face side intersects to form is constituted less than knife face (2d) behind said matrix rake face (2c) and the said matrix.
2. carbon film-coated slotting cutter according to claim 1 (1), said carbon film are diamond film.
3. carbon film-coated slotting cutter according to claim 1 and 2 (1) is a circular shape by the section with the concave surface of the concave surface (3a) of the formed said rake face side of face of said carbon film point of a knife (3b) quadrature and said back knife face side.
4. carbon film-coated slotting cutter according to claim 3 (1), the radius of curvature of the circular shape of the section of the concave surface of concave surface of said rake face side (3a) and said back knife face side is in the scope of 5 μ m to 3000 μ m.
5. carbon film-coated slotting cutter according to claim 4 (1), the concave surface of concave surface of said rake face side (3a) and said back knife face side with carbon film point of a knife quadrature and along the width on the direction of separately face in the scope of 10 μ m to 2000 μ m.
6. carbon film-coated slotting cutter according to claim 4 (1), the degree of depth of the concave surface (3a) of concave surface of said rake face side (3a) and said back knife face side is in the scope of 2 μ m to 15 μ m.
7. carbon film-coated slotting cutter according to claim 4 (1), the concave surface of concave surface of said rake face side (3a) and said back knife face side with the direction of carbon film point of a knife quadrature on width in the scope of 10 μ m to 2000 μ m,
The degree of depth of the concave surface (3a) of concave surface of said rake face side (3a) and said back knife face side is in the scope of 2 μ m to 15 μ m.
8. the manufacturing approach of a carbon film-coated slotting cutter for making the method for carbon film-coated slotting cutter, is characterized in that having:
The matrix preparatory process, prepare to have matrix point of a knife (2b) and clip matrix rake face (2c) that said matrix point of a knife (2b) adjoins each other and matrix after the tool base (2) of knife face (2d);
Carbon film forms operation, and knife face (2d) and said matrix point of a knife (2b) are gone up and formed carbon film behind the said matrix rake face (2c) of said tool base (2), said matrix; And
The Laser Processing operation; To said carbon film (3) illuminating laser beam; Be processed to form the said carbon film (3) on knife face (2d) behind zone on the said matrix rake face (2c) and the said matrix; Thereby form the concave surface (3a) of rake face side and the concave surface (3a) of back knife face side in rake face side and back knife face side respectively
The concave surface (3a) of said rake face side and said back knife face side intersects on said matrix point of a knife and forms carbon film point of a knife (3b),
In said Laser Processing operation, the light distribution on the beam profile of said laser beam is rendered as Gaussian distribution,
Shine said laser beam near the said rake face side or the said said carbon film of knife face side afterwards of the place ahead said carbon film point of a knife of said carbon film point of a knife,
Said laser beam scans along the bearing of trend of said carbon film point of a knife.
9. the manufacturing approach of carbon film-coated slotting cutter according to claim 8,
Form in the operation at said carbon film, apply, said carbon film is formed than other parts on said matrix point of a knife swell more through the CVD film forming.
10. according to Claim 8 or the manufacturing approach of 9 described carbon film-coated slotting cutters,
Said carbon film is a diamond film,
The wavelength of said laser beam is below the 360nm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2010-289037 | 2010-12-26 | ||
| JP2010289037 | 2010-12-26 |
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| CN2011205468819U Withdrawn - After Issue CN202411516U (en) | 2010-12-26 | 2011-12-23 | Carbon film-wrapped end mill |
| CN201110439657.4A Active CN102528142B (en) | 2010-12-26 | 2011-12-23 | Carbon film coated end mill and manufacture method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842071A (en) * | 2014-02-19 | 2015-08-19 | 钴碳化钨硬质合金印度有限公司 | Method and apparatus for removing material from a cutting insert using electromagnetic radiation |
| CN109676258A (en) * | 2019-01-21 | 2019-04-26 | 南京航空航天大学 | A kind of micro- milling cutter preparation method of cvd diamond based on laser and accurate sharpening |
| CN109789496A (en) * | 2016-09-29 | 2019-05-21 | 住友电工硬质合金株式会社 | Cutting element |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5899904B2 (en) * | 2010-12-26 | 2016-04-06 | 三菱マテリアル株式会社 | Carbon film coated end mill and method for producing the same |
| CN114178257B (en) * | 2021-12-01 | 2023-10-10 | 嘉兴沃尔德金刚石工具有限公司 | Precise de-coating method and device for diamond coated cutter |
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| US4755399A (en) * | 1983-05-27 | 1988-07-05 | Sumitomo Electric Industries, Ltd. | Process for the production of a cutting tool |
| JP2006096051A (en) * | 2001-06-14 | 2006-04-13 | Sumitomo Electric Ind Ltd | Working method of hard material and component of hard material |
| JP2002370106A (en) * | 2001-06-15 | 2002-12-24 | Osg Corp | Diamond-coated cutting tool |
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| CN104842071A (en) * | 2014-02-19 | 2015-08-19 | 钴碳化钨硬质合金印度有限公司 | Method and apparatus for removing material from a cutting insert using electromagnetic radiation |
| CN109789496A (en) * | 2016-09-29 | 2019-05-21 | 住友电工硬质合金株式会社 | Cutting element |
| CN109676258A (en) * | 2019-01-21 | 2019-04-26 | 南京航空航天大学 | A kind of micro- milling cutter preparation method of cvd diamond based on laser and accurate sharpening |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5899904B2 (en) | 2016-04-06 |
| CN202411516U (en) | 2012-09-05 |
| JP2012148398A (en) | 2012-08-09 |
| CN102528142B (en) | 2015-09-30 |
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