CN201720453U - Coated blade for processing aluminum sections - Google Patents
Coated blade for processing aluminum sections Download PDFInfo
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- CN201720453U CN201720453U CN2010201730969U CN201020173096U CN201720453U CN 201720453 U CN201720453 U CN 201720453U CN 2010201730969 U CN2010201730969 U CN 2010201730969U CN 201020173096 U CN201020173096 U CN 201020173096U CN 201720453 U CN201720453 U CN 201720453U
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Abstract
The utility model belongs to the field of non-ferrous metal cutting blades, and particularly discloses a coated blade for processing aluminum sections. The coated blade comprises a cemented carbide base, the cemented carbide base is provided with a front cutting surface arranged at the top and rear cutting surfaces arranged on the sides, the front cutting surface and the rear cutting surface are intersected to form cutting edges, the front cutting surface and two optional adjacent rear cutting surfaces are intersected to form cutting points, the front cutting surface is coated with a coating layer which is polished and has affinity to aluminum sections, the rear cutting surfaces are cemented carbide abrasive surfaces formed via grinding, and the cutting edges are sharp cutting edges which are not blunted and extend linearly. The coated blade has the advantages of high bonding resistance, strong wear resistance, high processing efficiency, low processing cost, long service life and the like.
Description
Technical field
The utility model relates to a kind of cutting tip, relates in particular to a kind of processing used for non-ferrous metal coated chip.
Background technology
In the metal cutting field, one is divided into P (steel), M (stainless steel), K (cast iron), N (non-ferrous metal), S (heat-resisting alloy and titanium alloy) and the several big classes of H (hardened steel) to work metal according to the work metal characteristic.And aluminium having a large capacity and a wide range in the non-ferrous metal field, its cutting characteristics are that fusing point is low, smear metal toughness is better, and the aluminium smear metal bonds on the upper surface of blade rake face easily.Smear metal and rake face bonding can produce following negative influence: the one, and make rake face that serious bonding abrasion take place, chip flow is not smooth, thereby causes cutting force to increase, and the heat in metal cutting increase finally makes the lifetime of cutter; The 2nd, the bonding of rake face smear metal forms built-up edge easily on the rake face of blade, cause the fineness on processing work surface not reach requirement.
The technological process of production of existing cutting tip is earlier rake face to be carried out polishing behind the blade sintering, grinds then and forms cutting edge, and its technological process as shown in Figure 1.The aluminum profile extrusion that obtains of processes all is a carbide alloy with its appearance of cutting tip as shown in Figure 1, and its rake face is the carbide alloy burnishing surface, and such cutting tip abrasion resistance properties is relatively poor, and the service life of blade is not long.
Along with the continuous development of cutting tip process technology, the advance of coating begins to be widely used in the metal cutting field.In existing comparatively advanced cutting tip, have various forms of composite coating blades, also have the process technology (for example handling coated chip) of on the composite coating basis, removing partial coating by sandblast or brush, but it goes the coating processing purpose is at the local relatively poor relatively coated substance of chemical property stability of removing of blade, and then expose chemical property more the stable coating material can keep the easy to identify sign of the relatively poor relatively coated substance of outermost layer stability at other positions as the contact-making surface that contact with work metal with abrasion detection when cutting.Certainly, one blasting treatment coating can not be equal to the polishing technology in the coated tip for processing aluminum materials, because difference according to processing intent, sandblast may be to be used for carrying out roughening, to be used for carrying out the wire drawing of metal surface or to be directly used in the unnecessary coating of removal or burr or the like, therefore might not reach polishing effect through common blasting treatment, in other words, the coated chip after common blasting treatment can not be applied to the processing of aluminium certainly.
Along with the development of PVD coating technology with popularize, the superiority that some blade manufacturers also begin to attempt coating is applied on the carbide chip of processing aluminum materials.According to our production experience for many years, the aluminum profile extrusion cutter with excellent properties should possess two conditions: the rake face of polishing and sharp cutting edge.
Knife face is to be close to line to contact with workpiece behind the aluminum profile extrusion blade, the wearing and tearing of back knife face are not our focus, and rake face is that face contacts with smear metal, and heat in metal cutting and cutting force mainly concentrate on rake face, so can obtain the effect of getting twice the result with half the effort in the improvement of rake face.But existing coated chip does not have the way of back knife face coating whole grindings being removed and only keeping the rake face coating, because the thinking set that forms for many years according to people, cutting tip all should utilize the coated substance of back knife face to improve wearability as far as possible.In addition, there is the high defective of roughness in the coating surface that existing coated chip applies, if coating polished the blade that forms cutting edge carry out polishing after the coating for overcoming the high defective of roughness, then can have influence on second essential condition--cutting edge that----is sharp of aluminum profile extrusion cutter.
The cutting edge of existing blade has two kinds: sharp cutting edge and passivation cutting edge.Passivation cutting edge be characterized in that the coating stress of enough cutting edge strength and low degree concentrates, the mechanical treatment that can bear sandblast or brush after coating to be removing partial coating, and keeps how much microcell shapes of cutting edge Treatment Design state.And the intensity of sharp cutting edge own is low, and then coating stress is too concentrated after the coating, and cutting edge is fragile more, carries out mechanical treatment after the coating again with regard to causing the destruction (collapsing as little) to cutting edge easily, does not meet the cutting edge microcell designing requirement of blade.Because the aluminium quality is softer, more glutinous, so the cutting edge of aluminum profile extrusion cutter needs very sharp; If but in a single day the keen edge of aluminum profile extrusion cutter prepare, just cannot carry out mechanical treatment to coating again.
Therefore, be difficult to find specially the coated chip of the excellent performance processed at aluminium on the existing market.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, and ability is strong, working (machining) efficiency is high, cost is little and the coated tip for processing aluminum materials of long service life to provide a kind of anti stick to wear and tear.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is a kind of coated tip for processing aluminum materials, described coated chip comprises a hard alloy substrate, this hard alloy substrate is provided with the rake face that is positioned at its top and is positioned at the back knife face of its sidepiece, the crossing cutting edge that is formed with of described rake face and back knife face, described rake face and two adjacent arbitrarily back knife faces intersect the formation point of a knife, be coated with on the described rake face through polishing and the coating low with the aluminium affinity, described back knife face is for grinding the hard-alloy grinding face that the back forms; It is without linear (being curved surface often through cutting edge after the Passivation Treatment extends) keen edge of extending of being of transpassivation processing that described rake face and back knife face intersect the cutting edge that forms.
Because the material difference of processed object, the cutter of one employing or the kind of blade are also different thereupon.For example the processing of cast iron materials mainly is short smear metal, and its rake face contacts less with smear metal, and the rake face influence is just little.And for the processing of aluminium of the present utility model (base) material, because the aluminium fusing point is about 660 ℃, in cutting process, temperature higher position slightly makes aluminium present semi-fluid condition, smear metal bonds on the rake face of blade easily like this, the time of contact of rake face and smear metal is long more, and then the negative influence to rake face is big more.At the aforementioned features of aluminum profile extrusion, the utility model proposes the above-mentioned coated chip that is specifically applied to aluminum profile extrusion.Technique scheme of the present utility model is compared with existing aluminum profile extrusion blade few in number, its difference is on the basis of considering the aluminum profile extrusion characteristics, fully optimized the technological process of production of aluminium cutting tip, utilize technology cheaply successfully to solve polishing and the technical barrier that keen edge can not get both after the coating, the superiority of coating is not fully exerted on the aluminum profile extrusion cutter.Be formed with on the rake face of above-mentioned coated tip for processing aluminum materials through polishing and the coating low with the aluminium affinity, then knife face is not for depositing the hard-alloy grinding face of any coating.Through our long application study and cutting experiment, its result shows that coated tip for processing aluminum materials of the present utility model possesses two outstanding features simultaneously: 1) cutting edge of blade is sharp unusually; 2) rake face of blade is extremely smooth.And these two distinguishing features have determined coated tip for processing aluminum materials of the present utility model to have excellent technique effect in the cutting of aluminium, can prolong the service life of blade greatly.
In the above-mentioned coated chip, described coating is preferably the single coating that titanium nitride, boride, diamond or DLC form, and described coating layer thickness is 1～10 μ m.In fact, coated substance can also be carbide, carbonitride etc., but on basis in conjunction with PVD coating material technology, we think the single coating that preferred employing boride, diamond or DLC form, because these several coated substances not only affinity with work metal aluminium are lower, be not easy to bond with work metal aluminium generation chemical diffusion, and the constant product quality height of producing.Since the crystal grain of coated substance than the crystal grain of hard alloy substrate more tiny (coated substance can reach crystal grain less than 50nm, and make cutter carbide alloy crystal grain one be 0.4～5 μ m); And the carbide surface composition one be two-phase (tungsten carbide mutually and bonding mutually) at least even also can be three-phase (tungsten carbide phase, carbonization (titanium-tungsten-tantalum-niobium) mutually and bond mutually), and the face coat of the utility model coated chip is a same substance, so the easier polishing of the face coat of the utility model blade obtains higher fineness.Because the coating layer thickness of optimal technical scheme grinds monolateral removal amount much smaller than blade, the coated substance that is deposited in the applying coating process like this on the knife face of back can be removed at an easy rate (because grind monolateral removal amount more than 100 μ m, one reaches about 150 μ m), therefore the back knife face is not coated with coated substance after grinding, but hard alloy substrate exposes the hard-alloy grinding face of formation, so not only reduce cost, and improved working (machining) efficiency.In addition, these several preferred coated substances can also make and present different colors by rake face (for example the rake face of titanium nitride coating blade is for golden yellow, and the rake face of boride coating blade is a grey), and the rake face change in color can become an outward appearance sign of further segmentation variety classes coated chip; Thereby back knife face because grind has been removed the true qualities that its coated substance manifests carbide alloy, and the various combination of this blade color is selected, distinguished different types of blade for operating personnel in the production practices from now on and provides convenience.
As to further improvement in the technical proposal, coating described in the above-mentioned coated chip is the composite coating that boride coating and titanium nitride coating are formed, and titanium nitride coating is positioned at outermost layer, and described composite coating thickness is 3～20 μ m.This composite coating blade is a kind of preferred technical scheme, and it not only possesses all advantages of above-mentioned single coated chip, and it fully combines the anti-chemical diffusion property of boride and the coefficient feature of reducing friction of titanium nitride.Owing to titanium nitride coating is arranged on outermost layer, so it more helps improving by polishing technology the quality of blade rake face.
The preparation method of above-mentioned the utility model coated tip for processing aluminum materials, comprise a plurality of steps of batching, compacting, sinter molding, surface treatment and applying coating, rake face to gained blade after the applying coating step polishes, back knife face to this blade grinds the formation keen edge again, obtains coated tip for processing aluminum materials.The characteristic that this preparation method makes polishing after the coating and keeps two kinds of aluminum profile extrusion cuttves of keen edge to need is realized simultaneously.
Existing coated chip does not have the way of back knife face coating whole grindings being removed and only keeping the rake face coating, because the thinking set that forms for many years according to people, cutting tip all should utilize the coated substance of back knife face to improve wearability as far as possible.And the utility model preparation method's ingenious part is the applying coating step is arranged in before polishing, the grinding steps; And before the applying coating step, carry out surface treatment, this processing can be that high efficiency sandblast or brush plucking are handled, purpose is the effective microcosmic area that increases the rake face surface, increase PVD coating adhesion, its rake face coated substance of coated chip of making of the utility model preparation method has higher anti-chemical bonding wearing and tearing ability like this, also have the bond strength higher with matrix, coating polishing back blade face is finer and close, can reduce the chemical diffusion bonding and the mechanical snap bonding of blade rake face and aluminium smear metal significantly, it is more smooth to make the aluminium smear metal discharge, and the working durability of blade and work piece surface smoothness also improve greatly.The utility model preparation method's grinding steps be after polishing step only the back knife face at blade carry out, so not only avoided polishing process that cutting edge is damaged and passivation, and can make that the cutting edge utmost point of blade is sharp as much as possible, strengthened cutting effect to aluminium.
In addition, the time that the preferred single material coating of the utility model is polished only needs 1/3rd of former carbide alloy polishing time, and often can obtain Ra is the following roughness of 0.1 μ m (sandblast or brush are handled and obtained roughness Ra is more than the 0.8 μ m), and the surface roughness Ra that the carbide surface polishing obtains is difficult to be controlled at below the 0.5 μ m, as seen preparation technology of the present utility model has not only improved rake face polished surface quality, and has shortened polishing time greatly.
Description of drawings
Fig. 1 is preparation technology's flow chart of cutting tip in the prior art.
Fig. 2 is the vertical view of coated tip for processing aluminum materials among the utility model embodiment 1.
Fig. 3 is the part sectioned view at A-A place among Fig. 2.
Fig. 4 is preparation technology's flow chart of the utility model coated tip for processing aluminum materials.
Marginal data:
1, hard alloy substrate; 2, rake face; 3, back knife face; 4, cutting edge; 5, point of a knife; 6, coating.
The specific embodiment
Embodiment 1:
A kind of as Fig. 2, the utility model coated tip for processing aluminum materials shown in Figure 3, this coated chip comprises that one is approximate rectangular-shaped hard alloy substrate 1, this hard alloy substrate 1 is provided with rake face 2 (being end face) that is positioned at its top and the back knife face 3 that is positioned at its sidepiece (i.e. four sides), rake face 2 and each back knife face 3 intersect and are formed with a cutting edge 4, this cutting edge 4 is keen edge that are linear extension of handling without transpassivation, rake face 2 and two adjacent arbitrarily back knife faces 3 intersect formation point of a knife 5, be coated with titanium nitride coating 6 on the rake face 2 through polishing, coating layer thickness is 5 μ m, grain size is 20nm, rake face 2 presents golden yellow, back knife face 3 is for grinding the hard-alloy grinding face that the back forms, and back knife face 3 presents the carbide alloy true qualities.
Present embodiment coated tip for processing aluminum materials preparation method's technological process comprises that successively batching, compacting, sinter molding, surface treatment, applying coating, rake face polishing, back knife face grind a plurality of steps as shown in Figure 4.Concrete, applying coating technology is that employing titanium target and nitrogen are raw material in the present embodiment, and the coating installation way is optimized, the rake face of routine and the paperback of the vertical clamping of target are changed into the perpendicular dress mode of rake face and the parallel clamping of target, coated substance vertically is deposited on the rake face 2, improves the bond strength of thickness and the coating 6 and the hard alloy substrate 1 of coating 6; According to the roughness that adopts titanium nitride coating 6 (concrete Ra=0.4 μ m), present embodiment carries out polishing time to the rake face coating and only is 5min, and the removal amount of polishing back titanium nitride coating 6 is about 0.6 μ m, roughness Ra=0.04 μ m; The monolateral removal amount that knife face grinds behind the polishing backsight blade blank deflection is 110～130 μ m.
Adopt the coated tip for processing aluminum materials and the existing blade (polishing back roughness Ra=0.08 μ m) of present embodiment that same processing object is carried out the contrast of machining, processing object is aluminium LC4; The standard of judging tool failure is: piece surface fineness and surperficial burr, or finished size instability; Test result after the contrast cutting is as shown in table 1 below:
The contrast cutting test table of comparisons of the coated chip of table 1: embodiment 1 and existing blade
By table 1 as seen, coated chip of the present utility model is adding man-hour than existing blade to aluminium, and cutter life can extend to more than 4 times of prior blade.
Embodiment 2:
A kind of the utility model coated tip for processing aluminum materials, this coated chip comprises that one is approximate rectangular-shaped hard alloy substrate, this hard alloy substrate is provided with rake face (being end face) that is positioned at its top and the back knife face that is positioned at its sidepiece (i.e. four sides), rake face and each back knife face intersects and is formed with a cutting edge, this cutting edge is the keen edge of handling without transpassivation that is linear extension, rake face and two adjacent arbitrarily back knife faces intersect the formation point of a knife, be coated with titanium boride coating on the rake face through polishing, coating layer thickness is 4.5 μ m, grain size is 24nm, rake face presents grey, back knife face is for grinding the hard-alloy grinding face that the back forms, and back knife face presents the carbide alloy true qualities.
Present embodiment coated tip for processing aluminum materials preparation method's technological process comprises that successively batching, compacting, sinter molding, surface treatment, applying coating, rake face polishing, back knife face grind a plurality of steps as shown in Figure 4.The applying coating technology of concrete present embodiment titanium boride is that the target and the argon gas of employing titanium and boron is raw material, and the installation way of coating is optimized, the rake face of routine and the paperback mode of the vertical clamping of target are changed into the perpendicular dress mode of rake face and the parallel clamping of target, coated substance vertically is deposited on the rake face, with the thickness of raising coating and the bond strength of coating and hard alloy substrate; According to the roughness roughness that adopts titanium boride coating (concrete Ra=0.35 μ m), polishing time is 8min, the titanium boride coating attenuate 0.5 μ m roughness Ra=0.025 μ m of polishing back rake face; The monolateral removal amount that knife face grinds behind the polishing backsight blade blank deflection is 110～130 μ m.
Adopt the coated tip for processing aluminum materials and the existing blade (polishing back roughness Ra=0.08 μ m) of present embodiment same processing object to be carried out the contrast of machining, processing object is pack alloy A360, its main chemical compositions comprises: Si9.0～10.0%, Fe 1.3%, Cu 0.6%, surplus is Al, and this hardness of alloy is HB=80Kg/mm
2The standard of judging tool failure is: piece surface fineness and surperficial burr, or finished size instability; Test result after the contrast cutting is as shown in table 2 below:
The contrast cutting test table of comparisons of the coated chip of table 2: embodiment 2 and existing blade
By table 2 as seen, coated chip of the present utility model is adding man-hour than existing blade to aluminium alloy, and cutter life can extend to more than 5 times of prior blade.
Embodiment 3:
A kind of the utility model coated tip for processing aluminum materials, this coated chip comprises that one is approximate rectangular-shaped hard alloy substrate, this hard alloy substrate is provided with rake face (being end face) that is positioned at its top and the back knife face that is positioned at its sidepiece (i.e. four sides), rake face and each back knife face intersects and is formed with a cutting edge, this cutting edge is the keen edge of handling without transpassivation that is linear extension, rake face and two adjacent arbitrarily back knife faces intersect the formation point of a knife, be coated with on the rake face through the titanium nitride of polishing and the composite coating of titanium boride, the composite coating gross thickness is 12 μ m, the titanium nitride grain size is 22nm, thickness is that 5 μ m are as the top layer, and titanium boride is made bottom, thickness is 7 μ m, grain size is 26nm, rake face presents golden yellow, and back knife face is for grinding the grinding face that the back forms, and back knife face presents the carbide alloy true qualities.
Present embodiment coated tip for processing aluminum materials preparation method's technological process comprises that successively batching, compacting, sinter molding, surface treatment, applying coating, rake face polishing (or sandblast), back knife face grind a plurality of steps as shown in Figure 4.Concrete, the applying coating technology of present embodiment titanium boride is that the target and the argon gas of employing titanium and boron is raw material, and the installation way of coating is optimized, the rake face of routine and the paperback mode of the vertical clamping of target are changed into the perpendicular dress mode of rake face and the parallel clamping of target, coated substance vertically is deposited on the rake face, with the thickness of raising coating and the bond strength of coating and hard alloy substrate; Be coated with adopt again behind the titanium boride titanium target and nitrogen as raw material coated with titanium nitride coating as outermost layer, its method and preceding method are basic identical; According to the roughness that adopts titanium nitride coating (concrete Ra=0.5 μ m), polishing time is 5min, the titanium nitride coating attenuate 0.6 μ m of polishing back rake face, roughness Ra=0.04 μ m; The monolateral removal amount that knife face grinds behind the polishing backsight blade blank deflection is 110～130 μ m.
Adopt the coated tip for processing aluminum materials and the existing blade (polishing back roughness Ra=0.08 μ m) of present embodiment same processing object to be carried out the contrast of machining, processing object is pack alloy A360, its main chemical compositions comprises: Si9.0～10.0%, Fe 1.3%, Cu 0.6%, surplus is Al, and this hardness of alloy is HB=80Kg/mm
2The standard of judging tool failure is: piece surface fineness and surperficial burr, or finished size instability; Test result after the contrast cutting is as shown in table 2 below:
The contrast cutting test table of comparisons of the coated chip of table 3: embodiment 3 and existing blade
By table 3 as seen, coated chip of the present utility model is adding man-hour than existing blade to aluminium alloy, and cutter life can extend to more than 7 times of prior blade.
Embodiment 4:
A kind of the utility model coated tip for processing aluminum materials, this coated chip comprises that one is approximate rectangular-shaped hard alloy substrate, this hard alloy substrate is provided with rake face (being end face) that is positioned at its top and the back knife face that is positioned at its sidepiece (i.e. four sides), rake face and each back knife face intersects and is formed with a cutting edge, this cutting edge is the keen edge of handling without transpassivation that is linear extension, rake face and two adjacent arbitrarily back knife faces intersect the formation point of a knife, be coated with diamond-like coating on the rake face through polishing, total coating thickness is 6 μ m, grain size is 18nm, rake face presents taupe, back knife face is for grinding the grinding face that the back forms, and back knife face presents the carbide alloy true qualities.
Present embodiment coated tip for processing aluminum materials preparation method's technological process comprises that successively batching, compacting, sinter molding, surface treatment, applying coating, rake face polishing (or sandblast), back knife face grind a plurality of steps as shown in Figure 4.Concrete, present embodiment applying coating technology is that employing carbon target and argon gas are raw material, and the installation way of coating is optimized, the rake face of routine and the paperback mode of the vertical clamping of target are changed into the perpendicular dress mode of rake face and the parallel clamping of target, coated substance vertically is deposited on the rake face, with the thickness of raising coating and the bond strength of coating and hard alloy substrate; According to the roughness that adopts diamond-like coating (concrete Ra=0.45 μ m), polishing time is 10min, the diamond-like coating attenuate 0.6 μ m of polishing back rake face, and roughness is Ra=0.03 μ m; The monolateral removal amount that knife face grinds behind the polishing backsight blade blank deflection is 110～130 μ m.
Adopt the coated tip for processing aluminum materials and the existing blade (polishing back roughness Ra=0.08 μ m) of present embodiment same processing object to be carried out the contrast of machining, processing object is pack alloy A360, its main chemical compositions comprises: Si9.0～10.0%, Fe 1.3%, Cu 0.6%, surplus is Al, and this hardness of alloy is HB=80Kg/mm
2The standard of judging tool failure is: piece surface fineness and surperficial burr, or finished size instability; Test result after the contrast cutting is as shown in table 2 below:
The contrast cutting test table of comparisons of the coated chip of table 4: embodiment 4 and existing blade
By table 4 as seen, coated chip of the present utility model is adding man-hour than existing blade to aluminium alloy, and cutter life can extend to more than 8 times of prior blade.
Claims (3)
1. coated tip for processing aluminum materials, described coated chip comprises a hard alloy substrate, this hard alloy substrate is provided with the rake face that is positioned at its top and is positioned at the back knife face of its sidepiece, described rake face and back knife face intersect the formation cutting edge, described rake face and two adjacent arbitrarily back knife faces intersect the formation point of a knife, it is characterized in that: be coated with on the described rake face through polishing and the coating low with the aluminium affinity, described back knife face is for grinding the hard-alloy grinding face that the back forms; It is without linear keen edge of extending of being of transpassivation processing that described rake face and back knife face intersect the cutting edge that forms.
2. coated chip according to claim 1 is characterized in that: described coating is the single coating that titanium nitride, boride, diamond or DLC form, and described coating layer thickness is 1～10 μ m.
3. coated chip according to claim 1 is characterized in that: described coating is the composite coating that boride coating and titanium nitride coating are formed, and titanium nitride coating is positioned at outermost layer, and described composite coating thickness is 3～20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201730969U CN201720453U (en) | 2010-04-28 | 2010-04-28 | Coated blade for processing aluminum sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201730969U CN201720453U (en) | 2010-04-28 | 2010-04-28 | Coated blade for processing aluminum sections |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201720453U true CN201720453U (en) | 2011-01-26 |
Family
ID=43488737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201730969U Expired - Lifetime CN201720453U (en) | 2010-04-28 | 2010-04-28 | Coated blade for processing aluminum sections |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201720453U (en) |
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2010
- 2010-04-28 CN CN2010201730969U patent/CN201720453U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110126 Effective date of abandoning: 20111207 |