CN208895271U - A kind of multiple-cutting-edge roughing tool - Google Patents

Abstract

The utility model discloses a kind of multiple-cutting-edge roughing tools, including knife handle and it is fixedly connected on the cutter head on the knife handle head, the cutter head includes the polycrystalline diamond layer for being formed by hard alloy layer by hard alloy and being fixedly connected on the hard alloy layer, the polycrystalline diamond layer has a plurality of cutting edge, and the knife handle is formed by hard alloy.The utility model has a plurality of cutting edge due to polycrystalline diamond layer, so that the multiple-cutting-edge roughing tool is when carrying out cutwork, the cutting output of each cutting edge is smaller, and cutting output is small will to make abrasion be controlled, to finally make the service life of this kind of cutter elongated.Meanwhile the multiple-cutting-edge roughing tool for having a plurality of cutting edge can also reduce the waste of material, improves processing efficiency and ensure the quality of workpiece.

Description

A kind of multiple-cutting-edge roughing tool

Technical field

The utility model relates to technical fields of mechanical processing, and in particular to a kind of multiple-cutting-edge roughing tool.

Background technique

Diamond cutter have extreme hardness and wearability, high heat conductance, low thermal coefficient of expansion, low-friction coefficient, with it is non- The features such as ferrous metal affinity is small makes it obtain very high machining accuracy and processing efficiency in high-speed cutting, is based on this Buddha's warrior attendant Stone cutter using more and more extensive.

The processing characteristics of diamond cutter are determined by the crystal structure of diamond, each in diamond crystal A carbon atom and four adjacent carbon atoms form covalent bonds, are spatially in positive tetrahedron structure, between the carbon atom of this structure Binding force is high, is macroscopically showing high hardness.

Currently, diamond cutter mainly has single-crystal diamond (MCD) cutter, polycrystalline diamond (PCD) cutter and diamond Coated cutting tool.Due to the characteristic of diamond lattic structure, the directionality of performance is very strong, and single-crystal diamond is easily along its cleavage facial cleft； Polycrystalline diamond is formed by the different fine diamond of orientation is grained sintered, is shown as isotropy, is not easy along its cleavage facial cleft； Diamond-coated tools also can get isotropic diamond coatings, so being not easy along its cleavage by controlling depositing operation Facial cleft.

In addition, polycrystal diamond cutter compares with diamond-coated tools, there are diamond coatings and hard to close by the latter Gold substrate binding force is weak, between coating and substrate difference of thermal expansion coefficients it is larger and the problems such as generate internal stress, diamond coatings knife In high-speed milling disbonding easily occurs for tool, leads to coating failure.Although as the former due to be added adhesive, hardness and Wearability is lower than diamond-coated tools, but it is used since there is no the serious binding force problem of diamond-coated tools It is more extensive compared with the former.

For polycrystal diamond cutter, still has the characteristics that high rigidity, therefore this kind of cutter in the prior art It is limited to the factors such as manufacturing process and often only has single-blade, twolip perhaps four swords and either single-blade, twolip or four swords, adopts With the mode of weld tabs, i.e., polycrystalline diamond material is welded on blade, which uses as cutting. This kind of polycrystal diamond cutter is in processing, since with less blade, so that the cutting output of each blade is big, cutting output is big It will cause biggish abrasion, thus finally make the service life of this kind of cutter shorter, ten~20 workpiece of often polishing, just Need replacing cutter, cause the waste of material, simultaneously because blade is less, easily cause the roughness of workpiece surface after processing compared with Greatly, the problem for causing workpiece quality low.In addition, less blade will make processing efficiency be restricted.

Utility model content

The utility model is intended to solve at least some of the technical problems in related technologies.

For this purpose, the utility model needs to provide a kind of multiple-cutting-edge roughing tool, which has more Cutting edge, improving cutting-tool's used life, the waste for reducing material, improving processing efficiency and ensuring the quality of workpiece.

According to the multiple-cutting-edge roughing tool in the utility model embodiment, including knife handle and it is fixedly connected on the knife handle head The cutter head in portion, the cutter head include being formed by hard alloy layer by hard alloy and being fixedly connected on the hard alloy layer Polycrystalline diamond layer, the polycrystalline diamond layer has a plurality of cutting edge, and the knife handle formed by hard alloy.

As the further optinal plan of the multiple-cutting-edge roughing tool, the hard alloy is the conjunction of tungsten carbide-base hard Gold.

As the further optinal plan of the multiple-cutting-edge roughing tool, the matter of the cobalt in the tungsten carbide base carbide alloy It measures percentage and is no more than 12%, grain size is no more than 0.4 μm, and hardness is HRA92~93.

As the further optinal plan of the multiple-cutting-edge roughing tool, the polycrystalline diamond layer is with the hard alloy Layer is that substrate is sintered.

As the further optinal plan of the multiple-cutting-edge roughing tool, the knife handle and the hard alloy layer pass through weldering It connects and achieves a fixed connection.

As the further optinal plan of the multiple-cutting-edge roughing tool, the polycrystalline diamond has eight cutting edges.

As the further optinal plan of the multiple-cutting-edge roughing tool, the polycrystalline diamond has 12 cuttings Sword.

As the further optinal plan of the multiple-cutting-edge roughing tool, the front of the cutting edge is inclined smooth Face, the back side of the cutting edge be compared with the more inclined arcwall face in front, the back side of a cutting edge with it is another The front of a adjacent cutting edge forms chip space.

As the further optinal plan of the multiple-cutting-edge roughing tool, the bottom of the chip space is smooth smooth Face.

As the further optinal plan of the multiple-cutting-edge roughing tool, the cutting edge includes straightway and tilting section, The outer wall of the straightway is concordant with the outer wall of the knife handle, and the tilting section is connected with the straightway, and towards the knife The axial direction of handle is obliquely installed, and the chip space extends to from the end of the cutter head along the tilting section described straight The tail portion of line segment, the chip space include extended remittance bits section corresponding with the tilting section and with the straightway is corresponding prolongs Stretch the chip ejection segment thereupon of setting.

The utility model has the beneficial effects that

According to the multiple-cutting-edge roughing tool in above embodiments, since polycrystalline diamond layer has a plurality of cutting edge, so that For the multiple-cutting-edge roughing tool when carrying out cutwork, the cutting output of each cutting edge is smaller, and cutting output is small will to wear It is controlled, to finally make the service life of this kind of cutter elongated.Meanwhile having the multiple-cutting-edge roughing tool of a plurality of cutting edge also The waste of material can be reduced, processing efficiency is improved and ensures the quality of workpiece.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 shows the composition figure for implementing provided multiple-cutting-edge roughing tool according to the utility model；

Fig. 2 shows a kind of perspective views of multiple-cutting-edge roughing tool according to provided by the utility model embodiment one；

Fig. 3 shows the partial enlarged view of the part A in Fig. 2；

Fig. 4 shows a kind of top view of multiple-cutting-edge roughing tool according to provided by the utility model embodiment one；

Fig. 5 shows a kind of perspective view of multiple-cutting-edge roughing tool according to provided by the utility model embodiment two；

Fig. 6 shows the partial enlarged view of the part B in Fig. 5；

Fig. 7 shows a kind of top view of multiple-cutting-edge roughing tool according to provided by the utility model embodiment two；

Fig. 8, which is shown, implements a kind of provided manufacturing method process of multiple-cutting-edge roughing tool according to the utility model Figure.

Main element symbol description:

100- knife handle；200- cutter head；210- hard alloy layer；220- polycrystalline diamond layer；221- cutting edge；222- chip removal Slot；The front 2211-；The back side 2212-；2213- straightway；2214- tilting section；2221-, which converges, considers section to be worth doing；2222- chip ejection segment thereupon.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down " It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

It please refers to Fig. 1-7, in the embodiments of the present invention, provides a kind of multiple-cutting-edge roughing tool, the multiple-cutting-edge is thick Process tool is for the roughing to workpiece.The multiple-cutting-edge roughing tool includes knife handle 100 and is fixedly connected on knife handle 100 The cutter head 200 in portion, cutter head 200 include being formed by hard alloy layer 210 by hard alloy and being fixedly connected on hard alloy layer Polycrystalline diamond layer 220 on 210, polycrystalline diamond layer 220 have a plurality of cutting edge 221, and knife handle 100 is by hard alloy shape At.

In this way, since there is a plurality of cutting edge 221 due to polycrystalline diamond layer 220, so that the multiple-cutting-edge roughing tool exists When carrying out cutwork, the cutting output of each cutting edge 221 is smaller, and cutting output is small will to make abrasion be controlled, thus most Make the service life of this kind of cutter elongated eventually.Meanwhile the multiple-cutting-edge roughing tool for having a plurality of cutting edge 221 can also reduce material Waste, improve processing efficiency and ensure the quality of workpiece.

Below with reference to specific embodiment, the utility model is described in further detail.

Embodiment one

The present embodiment one provides a kind of multiple-cutting-edge roughing tool, for carrying out roughing to workpiece.

Fig. 1-4 is please referred to, the polycrystalline diamond layer 220 of the multiple-cutting-edge roughing tool has eight cutting edges 221.

In the present embodiment, hard alloy used in hard alloy layer 210 and knife handle 100 can ensure entire cutter tool There is enough intensity, to guarantee cutter is long-term, stable use.

Hard alloy has a series of excellent performances such as hardness is high, wear-resisting, intensity and toughness are preferable, heat-resisting, corrosion-resistant, special Be not its high rigidity and wearability, even if 500 DEG C at a temperature of be held essentially constant, still have at 1000 DEG C very high Hardness.Hard alloy refers to the sintered combined material at least containing a kind of metal carbides composition.Tungsten carbide, cobalt carbide, carbonization Niobium, titanium carbide, tantalum carbide are the common ingredients of wolfram steel.The crystallite dimension of carbide component (or phase) is usually in 0.2-10 micron Between, carbide grain is combined together using metal adhesive.Binder typically refers to metallic cobalt (Co), but to some special Purposes, nickel (Ni), iron (Fe) or other metals and alloy can also be used.

In the present embodiment, above-mentioned hard alloy selects tungsten carbide base carbide alloy, and in tungsten carbide base carbide alloy Cobalt mass percent be no more than 12%, grain size be no more than 0.4 μm, hardness HRA92-93.

It is appreciated that in general, tungsten carbide crystal grain degree is smaller when cobalt content is identical, hardness is bigger, wearability It is better, but bending strength, toughness relative reduction.In addition, cobalt content is bigger when other conditions are constant, the toughness of material is better, But hardness relative reduction.Therefore specifically how to select material that should depend on the circumstances.

For example, in certain embodiments, the quality percentage amounts of the cobalt in above-mentioned tungsten carbide base carbide alloy are 12%, crystal grain Degree is 0.4 μm, hardness HRA92.5, density 14.10g/cm3, bending strength 4200N/mm2.Hereinafter involved carbon Changing tungsten base cemented carbide can be referred to by taking this specific tungsten carbide base carbide alloy as an example.

Certainly, in other embodiments, it also can choose other types of hard alloy.

In the present embodiment, polycrystalline diamond layer 220 with hard alloy layer 210 be substrate be sintered, and knife handle 100 with Hard alloy layer 210 is achieved a fixed connection by welding.

When hard alloy selects aforementioned tungsten carbide base carbide alloy, when being welded, hard alloy layer 210 and knife handle 100 welding are the butt welding of tungsten carbide base carbide alloy and tungsten carbide base carbide alloy, and deformation quantity is more closely, welding stability It is good.

Incorporated by reference to reference Fig. 2-3, in the present embodiment, the front 2211 of cutting edge 221 is inclined burnishing surface, cutting edge 221 back side 2212 is compared with positive 2211 more inclined arcwall faces, the back side 2212 and another phase of a cutting edge 221 The front 2211 of adjacent cutting edge 221 forms chip space 222.

In this way when carrying out cutwork, the front 2211 of cutting edge 221 is applied to workpiece, guarantees the smooth of cutwork Carry out, and cutwork of the back side 2212 of arc then for positive 2211 provides strong support, prevent cutting edge 221 by It squeezes and deforms, be able to extend cutting-tool's used life.

In addition, being considered to be worth doing by the appearance that the chip space 222 that the back side 2212 and front 2211 of arc are formed can increase chip space 222 Space provides basis for more smoothly chip removal work.

Please continue to refer to Fig. 2-3, in the present embodiment, the bottom of chip space 222 is smooth shiny surface.

In other words, the joint of two neighboring cutting edge 221 is smooth shiny surface, at this time when scrap is present in chip space When in 222, scrap is enabled to be discharged along smooth shiny surface.

When cutting depth is shallower, the end of cutting edge 221 is applied to workpiece, and cutting edge 221 is in cutting at this time, in advance The chip space 222 stayed is sufficiently large, and scrap will not form extruding in chip space 222, therefore does not have to worry chip removal situation.

And when cutting depth is deeper, the volume of reserved chip space 222 is smaller at this time, and scrap is easy in chip space 222 It inside accumulates, certain difficulty is caused to chip removal.

In this regard, in certain embodiments, referring to FIG. 3, cutting edge 221 may include straightway 2213 and tilting section 2214, the outer wall of straightway 2213 is concordant with the outer wall of knife handle 100, and tilting section 2214 is connected with straightway 2213, and towards knife The axial direction of handle 100 is obliquely installed, and chip space 222 extends to straight line along tilting section 2214 from the end of cutter head 200 The tail portion of section 2213, chip space 222 include extended remittance corresponding with tilting section 2214 consider to be worth doing section 2221 and with straightway 2213 Corresponding extended chip ejection segment thereupon 2222.

Thus, it is possible to make the end of chip space 222, i.e., chip space 222 corresponds to that straightway 2213 extends Section, i.e. chip ejection segment thereupon 2222, being reserved in forever can guarantee that the scrap in remittance bits section 2221 is arranged from the chip ejection segment thereupon 2222 outside Out.

In order to form a plurality of cutting edge 221 on polycrystalline diamond layer 220, the present embodiment additionally provides a kind of multiple-cutting-edge simultaneously The manufacturing method of roughing tool, referring to FIG. 8, method includes the following steps:

S100, hard alloy is taken to form hard alloy layer 210；

S200, sinter molding goes out polycrystalline diamond layer 220 on hard alloy layer 210；

S300, hard alloy is taken to form knife handle 100；

S400, knife handle 100 and hard alloy layer 210 are welded together；And

S500, galvano-cautery processing is carried out to polycrystalline diamond layer 220 to form cutting edge 221.

In this way, powerful discharge with explosion makes since galvano-cautery processing can generate the pulse discharging energy of high concentration The metal melt of polycrystalline diamond layer 220, part diamond graphitization and oxidation, part diamond drop-off, so as to obtain Greater number of cutting edge 221, it is good manufacturability, high-efficient.

In addition, by galvano-cautery processing it is also possible that cutting edge has complicated contours profiles.

It should be noted that above-mentioned steps S500 is completed by spark eroding machine, the spark eroding machine into One step may be selected to inspire confidence in your silent QXD250.

Using inspire confidence in you write from memory QXD250 carry out galvano-cautery processing can refer to following step:

S510, the outside diameter for being ground polycrystalline diamond layer 220；

S520, the profile that cutting edge 221 is processed with shaped electrode；

S530, chip space 222 is opened, until cutting edge 221 has predetermined tread；And

S540, machining center empty avoiding.

Abovementioned steps S540 primarily serves damping, and the effect of empty avoiding specifically can be by way of laser processing each An aperture is made a call at the center that cutting edge 221 the is surrounded i.e. center of cutter head 200.

In some embodiments, in order to improve the welding of the knife handle 100 in abovementioned steps S400 Yu hard alloy layer 210 Effect can also include step S350 between step S300 and step S400.At this point, above-mentioned manufacturing method can be with are as follows:

S100, hard alloy is taken to form hard alloy layer 210；

S200, sinter molding goes out polycrystalline diamond layer 220 on hard alloy layer 210；

S300, hard alloy is taken to form knife handle 100；

S350, to the welding surface sanding and polishing of knife handle 100 and hard alloy layer 210；

S400, knife handle 100 and hard alloy layer 210 are welded together；

S500, galvano-cautery processing is carried out to polycrystalline diamond layer 220 to form cutting edge 221.

In order to ensure sanding and polishing effect, sanding and polishing can be realized by surface grinding machine, and ensure the coarse of welding surface Degree is no more than Ra0.4.

Further, step S400 can refer to following step progress:

S410, soldering paste is coated on the welding surface of knife handle 100 and hard alloy layer 210；

S420, knife handle 100 and hard alloy layer 210 are fixed using welding fixture；

S430, by knife handle 100 and hard alloy layer 210 as carrying out vacuum welding in vacuum brazing stove；And

S440, cooling.

It should be noted that the welding temperature of the vacuum welding in above-mentioned steps S430 is 600 DEG C~700 DEG C, when welding A length of 2~3 hours.Cooling in step S440 uses natural air cooling mode.

So far, implementation by the above-mentioned manufacture method may make polycrystalline diamond layer 220 to have greater number of cutting Sword 221, and cutting edge 221 is enabled to have increasingly complex profile simultaneously, the workpiece of more complexity can be processed.

In addition, it is necessary to, it is noted that when using above-mentioned manufacturing method, it should be noted that the parameters of cutting edge 221, Such as helical angle, sword slot anterior angle, sword slot length, groove depth, anterior angle fathom and tread etc..

For the multiple-cutting-edge roughing tool in the utility model embodiment, helical angle may be selected 15~30 degree, sword Slot anterior angle may be selected 7~13 degree, and sword slot length may be selected 3~7 millimeters, and groove depth may be selected 1~2 millimeter, and anterior angle fathoms can 0.2~1 millimeter of selection, tread may be selected 0.05~1 millimeter.

Certainly, when actually carrying out these parameter regulations, the case where being processed according to actual field etc., is adjusted and really The specific value of these fixed parameters.

Embodiment two

The present embodiment two provides a kind of multiple-cutting-edge roughing tool, for carrying out roughing to workpiece.

Fig. 5-7 is please referred to, the polycrystalline diamond layer 220 of the multiple-cutting-edge roughing tool has 12 cutting edges 221.

Compared with embodiment one, the present embodiment has more cutting edges 221, and the multiple-cutting-edge in the present embodiment two slightly adds at this time Work cutter has effect more better than multiple-cutting-edge roughing tool in embodiment one.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into Row combination and combination.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model Inside it can make changes, modifications, alterations, and variations to the above described embodiments.

Claims (10)

1. a kind of multiple-cutting-edge roughing tool, including knife handle and it is fixedly connected on the cutter head on the knife handle head, which is characterized in that institute Stating cutter head includes the plycrystalline diamond Buddha's warrior attendant for being formed by hard alloy layer by hard alloy and being fixedly connected on the hard alloy layer Rock layers, the polycrystalline diamond layer have a plurality of cutting edge, and the knife handle is formed by hard alloy.

2. multiple-cutting-edge roughing tool as described in claim 1, which is characterized in that the hard alloy is the conjunction of tungsten carbide-base hard Gold.

3. multiple-cutting-edge roughing tool as claimed in claim 2, which is characterized in that cobalt in the tungsten carbide base carbide alloy Mass percent is no more than 12%, and grain size is no more than 0.4 μm, and hardness is HRA92~93.

4. multiple-cutting-edge roughing tool as described in claim 1, which is characterized in that the polycrystalline diamond layer is closed with the hard Layer gold is that substrate is sintered.

5. multiple-cutting-edge roughing tool as described in claim 1, which is characterized in that the knife handle passes through with the hard alloy layer Welding achieves a fixed connection.

6. multiple-cutting-edge roughing tool as described in claim 1, which is characterized in that the polycrystalline diamond has eight cuttings Sword.

7. multiple-cutting-edge roughing tool as described in claim 1, which is characterized in that the polycrystalline diamond has 12 cuttings Sword.

8. such as multiple-cutting-edge roughing tool described in claim 5 or 6, which is characterized in that the front of the cutting edge is inclined Burnishing surface, the back side of the cutting edge be compared with the more inclined arcwall face in front, the back side of a cutting edge and The front of another adjacent cutting edge forms chip space.

9. multiple-cutting-edge roughing tool as claimed in claim 8, which is characterized in that the bottom of the chip space is smooth smooth Face.

10. multiple-cutting-edge roughing tool as claimed in claim 8, which is characterized in that the cutting edge includes straightway and inclination Section, the outer wall of the straightway is concordant with the outer wall of the knife handle, and the tilting section is connected with the straightway, and towards described The axial direction of knife handle is obliquely installed, and the chip space extends to from the end of the cutter head along the tilting section described The tail portion of straightway, the chip space include extended remittance bits section corresponding with the tilting section and corresponding with the straightway Extended chip ejection segment thereupon.