CN104708006A - Powder metallurgy compound cam and manufacturing method thereof - Google Patents
Powder metallurgy compound cam and manufacturing method thereof Download PDFInfo
- Publication number
- CN104708006A CN104708006A CN201310676876.3A CN201310676876A CN104708006A CN 104708006 A CN104708006 A CN 104708006A CN 201310676876 A CN201310676876 A CN 201310676876A CN 104708006 A CN104708006 A CN 104708006A
- Authority
- CN
- China
- Prior art keywords
- cam
- liner
- powder metallurgy
- green compact
- cam bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention belongs to the technical field of cams, and in particular, relates to a powder metallurgy compound cam and a manufacturing method thereof. The powder metallurgy compound cam consists of a cam piece and a liner with different materials, wherein the cam piece and the liner both comprise outer edges and inner edges, and further comprise base circle parts and peach tip parts; the inner edge of the cam piece and the outer edge of the liner are compounded through metallurgical bonding; and the outer edge of the liner and the inner edge of the cam piece are the same in shape, are both similar to the outer edge of the cam piece in shape, and are both cam-shaped. Blanks of the cam piece and the liner are sintered to obtain the powder metallurgy compound cam. The compound cam is suitable for a mechanically assembled cam shaft; and compared with a conventional powder metallurgy cam or a steel cam, the compound cam can save such procedures as keyway pulling and induction hardening, and has such advantages as high density, good precision of inner hole size, high torque, even hardness distribution of the liner and the cam piece, stress relief and good wear resistance.
Description
Technical field
The invention belongs to cam technical field, particularly a kind of powder metallurgy multiple mounted cam and manufacture method thereof.
Background technology
Assembled cam shaft have quality light, can the advantages such as flexible design and processing, wearability be good, be widely used in the engine of automobile and motorcycle at present.Traditional cam bit generally adopts the techniques such as forging, extruding, drawing to be prepared from, and then carries out surface hardening process.Forging Technology is adopted directly steel disc forge hot to be become blank, carry out the high cam bit steel pipe blank of cold forging preparation size precision again.Cold forging can also be adopted directly to prepare cam bit.Also can directly adopt extrusion process to prepare cam bit, then carry out cold drawing and carry out size Control, then carry out cutting and obtain the very high cam bit of dimensional accuracy.People also develop and adopt steel pipe directly to carry out cold-drawn and prepare cam bit.Above-mentioned technique exists that production process is long, cost is high, stock utilization is low and composition such as not easily to adjust at the deficiency.
In order to reduce costs, adopt cam bit prepared by conventional powder metallurgical, Fig. 1 is the schematic top plan view of a kind of P/M cam in prior art.The outside edges of this P/M cam 1 is cam-shaped, and inward flange is circular.This P/M cam 1 adopts powder metallurgical technique to make, and first adopts compressing, and then sintering and forge hot, then carry out impewdance matching to the outward flange of cam, improves the outer peripheral hardness of cam, with satisfied use needs.But the hardness of inward flange also can improve, but is less than the outer peripheral hardness of cam simultaneously.Its shortcoming of the P/M cam of this kind of manufacture technics is adopted to be that due to when quenching, the inward flange of cam affects hardness by quenching and improves, and becomes fragile, and easily causes cam to ftracture like this when assembling.
Fig. 2 shows another kind of P/M cam in prior art, this P/M cam is multiple mounted cam, the cam bit 2-1 that this powder metallurgy multiple mounted cam 2 is made up of different materials and liner 2-2 forms, described cam bit 2-1 is made by powder metallurgy process, described liner 2-2 can adopt powder metallurgy process or traditional handicraft such as drawing, rolling etc. to make, then cam bit 2-1 and liner 2-2 is compounded to form powder metallurgy multiple mounted cam 2, and described cam bit 2-1 is different with the material of liner 2-2.As shown in Figure 2, the liner 2-2 of this powder metallurgy multiple mounted cam 2 is round tube or opposite sex pipe.This powder metallurgy multiple mounted cam is composited, because this reducing the problem of Cracking that the P/M cam described in Fig. 1 occurs owing to adopting softer liner and harder cam bit.But also there is some problems in the powder metallurgy multiple mounted cam described in Fig. 2, because cam 2-1 to be greater than the thickness at basic circle place at the thickness of peach tip, therefore when cam shrinks, peach tip is different with the stress of basic circle place to the generation of liner 2-2, cause the circularity of liner 2-2 uneven, need following process, add cost.
Summary of the invention
The object of the invention is to propose a kind of powder metallurgy multiple mounted cam and manufacture method thereof, improvement is made in structural design and inner lining material, can obtain that hole size precision is good, moment of torsion is high, liner and cam bit hardness is evenly distributed, relieve stresses, wearability are good etc. powder metallurgy multiple mounted cam, and to reduce costs.
For reaching this object, the present invention by the following technical solutions:
This powder metallurgy multiple mounted cam is made up of two parts:
Cam bit: adopt the first material, comprises outward flange and inward flange, is divided into base circle portion and peach nose part;
Liner: adopt the second material, comprises outward flange and inward flange, is divided into base circle portion and peach nose part;
The inward flange of described cam bit and the outward flange of described liner are combined with each other by metallurgical binding;
Described first material and the second material are different materials;
The outward flange of described liner is identical with the inward flange shape of described cam bit, all similar to the outward flange shape of cam bit, in cam face.
The shape of the inward flange of described liner is circular; Or similar to the outward flange shape of liner, in cam face.
Vertical range between the peach tip outer edge of described cam bit is more than or equal to the vertical range between the basic circle place outer edge of cam bit.
The inward flange of described liner has the projection of 0 ~ 30 decile, and the degree of depth of described projection is 0.01 ~ 1.0mm.
The degree of depth of described projection is 0.1 ~ 0.3mm.
Described first material is the combination of iron, phosphorus, carbon and adding material, and described adding material is any one or more in chromium, molybdenum, tungsten, copper, nickel, silicon, manganese element.
The one-tenth of described first material is grouped into and with mass percent is: the chromium of 0 ~ 20%, the molybdenum of 0 ~ 10%, 0 ~ 5% tungsten, 0 ~ 15% copper, 0 ~ 8% nickel, 0 ~ 3% silicon, 0 ~ 3% manganese, 0.1 ~ 1% phosphorus, 0.1 ~ 5% carbon, all the other are iron.
Described second material is the combination of iron, carbon and adding material, and described adding material is any one or more in copper, molybdenum, nickel, chromium element.
The one-tenth of described second material is grouped into and with mass percent is: the copper of 0 ~ 30%, the nickel of 0 ~ 10%, 0 ~ 10% molybdenum, 0 ~ 10% chromium, 0 ~ 3% carbon, all the other are iron.
The manufacture method of a kind of powder metallurgy multiple mounted cam provided by the invention, carry out according to the following steps:
The first material is adopted to make cam bit green compact;
Adopt second material different from the first material to make liner green compact, the outer peripheral shape of described liner is identical with the inward flange shape of described cam bit and similar to the outward flange shape of cam bit, in cam face;
Described cam bit green compact and liner green compact are nested together;
Sinter the cam bit green compact and liner green compact that nest together, cam bit and liner are welded together.
Low 0.01 ~ the 2.00mm of height of the aspect ratio cam bit green compact of described liner green compact.
Low 0.1 ~ the 0.5mm of height of the aspect ratio cam bit green compact of described liner green compact.
Before described cam bit green compact and liner green compact being nested together, liner green compact and cam bit green compact are carried out to the presintering of 800 ~ 1000 DEG C.
Described first material is the combination of iron, phosphorus, carbon and adding material, and described adding material is any one or more in chromium, molybdenum, tungsten, copper, nickel, silicon, manganese element.
Described second material is the combination of iron, carbon and adding material, and described adding material is any one or more in copper, molybdenum, nickel, chromium element.
The manufacture method of another powder metallurgy multiple mounted cam provided by the invention, carry out according to the following steps:
Carry out batch mixing respectively to the powder making cam bit and liner, the batch mixing raw material of described cam bit is made up of the first material, and the batch mixing raw material of described liner forms by from different second materials of the first material;
Extra quality boots cloth is adopted to the powder of the cam bit after batch mixing and liner, suppress described cam bit and described liner simultaneously, once compressingly obtain powder metallurgy multiple mounted cam green compact, in described powder metallurgy multiple mounted cam green compact, the outer peripheral shape of described liner is similar to the outer peripheral shape of described cam bit, in cam face;
Described powder metallurgy multiple mounted cam green compact are sintered, prepares powder metallurgy multiple mounted cam.
Described sintering temperature is 1050 ~ 1250 DEG C, and sintering time is 10 ~ 60 minutes, and sintering atmosphere is cracked ammonium, hydrogen or vacuum.
Described first material is the combination of iron, phosphorus, carbon and adding material, and described adding material is any one or more in chromium, molybdenum, tungsten, copper, nickel, silicon, manganese element.
Described second material is the combination of iron, carbon and adding material, and described adding material is any one or more in copper, molybdenum, nickel, chromium element.
Beneficial effect of the present invention is:
Powder metallurgy multiple mounted cam provided by the invention and manufacture method thereof, can obtain that hole size precision is good, moment of torsion is high, liner and cam bit hardness is evenly distributed, relieve stresses, wearability are good etc. powder metallurgy multiple mounted cam, and reduce costs.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of a kind of P/M cam of prior art.
Fig. 2 is the schematic top plan view of a kind of powder metallurgy multiple mounted cam of prior art.
Fig. 3 is the schematic top plan view of a kind of powder metallurgy multiple mounted cam that embodiment one provides.
Fig. 4 is the schematic top plan view of the another kind of powder metallurgy multiple mounted cam that embodiment one provides.
Fig. 5 is the schematic top plan view of a kind of powder metallurgy multiple mounted cam that embodiment two provides.
Fig. 6 is the sectional view of Fig. 5 along A-A' direction.
Reference numeral:
1,2,3,4-powder metallurgy multiple mounted cam; 2-1,3-1,4-1-cam bit; 2-2,3-2,4-2-liner.
Detailed description of the invention
The invention provides a kind of powder metallurgy multiple mounted cam and manufacture method thereof, below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not entire infrastructure.
Embodiment one
Present embodiments provide a kind of powder metallurgy multiple mounted cam, Fig. 3 shows its schematic top plan view.As shown in Figure 3, this powder metallurgy multiple mounted cam 3 comprises cam bit 3-1 and liner 3-2.Shown cam bit 3-1 and described liner 3-2 is combined with each other.
In the application of cam, the driving mechanism cooperation such as the cam bit 3-1 needs of cam and the tappet of engine, this needs the outward flange of cam bit 3-1 to have higher hardness, and therefore cam bit 3-1 adopts powder metallurgy process to make by the first material in the present embodiment.Described first material is made up of the material of main part and adding material comprising iron, phosphorus and carbon, and described adding material is any one or combination in the elements such as chromium, molybdenum, tungsten, copper, nickel, silicon, manganese.It is chromium is 0 ~ 20% that the one-tenth of described first material is grouped into mass percent, molybdenum is 0 ~ 10%, tungsten is 0 ~ 5%, copper is 0 ~ 15%, nickel is 0 ~ 8%, silicon is 0 ~ 3%, manganese is 0 ~ 3%, phosphorus is 0.1 ~ 1%, carbon is 0.1 ~ 5%, all the other are iron.
In preferred mode, it be chromium is 3 ~ 6% that the one-tenth of the first material is grouped into mass percent, molybdenum is 0.8 ~ 1.5%, copper is 1.5 ~ 2.5%, silicon is 0.3 ~ 0.6%, manganese is 0.3 ~ 0.6%, phosphorus is 0.4 ~ 0.6%, carbon is 2.0 ~ 2.5%, all the other are iron.The cam bit adopting the first material of mentioned component composition and mass percent to make, ensure that to have higher hardness, in the course of work of cam, has excellent wearability, improves the life-span of cam.
In the mode be more preferably, it be chromium is 4 ~ 8% that the one-tenth of the first material is grouped into mass percent, molybdenum is 0.8 ~ 1.5%, copper is 1.5 ~ 2.5%, silicon is 0.3 ~ 0.6%, manganese is 0.3 ~ 0.6%, phosphorus is 0.4 ~ 0.6%, carbon is 2.0 ~ 2.5%, all the other are iron.Adopt the cam bit that the first material of mentioned component composition and mass percent is made, its hardness is higher, and wearability is better.
And in the application of cam, the liner 3-2 of cam needs to be combined with the steel pipe of camshaft, this needs liner 3-2 to have the hardness matched with steel pipe, and therefore liner 3-2 adopts powder metallurgy process to make by the second material in the present embodiment.Described second material is made up of the main body and adding material comprising iron and carbon, and described adding material is and any one or combination in the element such as copper, molybdenum, nickel, chromium.It is copper is 0 ~ 30% that the one-tenth of described second material is grouped into mass percent, nickel is 0 ~ 10%, molybdenum is 0 ~ 10%, chromium is 0 ~ 10%, carbon is 0 ~ 3%, all the other are iron.
In preferred mode, it be copper is 1.5 ~ 2.5% that the one-tenth of the second material is grouped into mass percent, carbon is 0.6 ~ 0.9%, all the other are iron.Adopt the liner that the second material of mentioned component composition and mass percent is made, there is the suitable hardness of mating with steel pipe, and medium density, the stress produced in the assembling process of follow-up cam can be absorbed well, prevent the cracking of cam, improve product yield.
As described in Figure 3, the inward flange of cam bit 3-1 has the cam face similar to outward flange, identical with the shape of the outward flange of the liner 3-2 of cam bit 3-1 compound and the inward flange of cam bit 3-1, that is, on cam bit 3-1, any point place outward flange is all equal with the vertical range h3 between inward flange.The shape of the inward flange of liner 3-2 is circular, and the vertical range of liner 3-2 between the outward flange and inward flange of peach tip i.e. thickness h 1 are greater than vertical range between basic circle place outward flange and inward flange i.e. thickness h 2.The inward flange of described liner 3-2 has the projection of 0 ~ 30 decile, and the degree of depth of described projection is 0.01 ~ 1.0mm, for the follow-up assembling with steel pipe.
In the process of cam bit and liner compound, described compound is undertaken by the metallurgical binding of powder metallurgy sintered formation.In sintering process, because cam bit can exist contraction, certain stress is produced to liner, and in sintering process, due to the difference of material, the contraction of cam bit is greater than the contraction of liner, and cam bit shrinks the stress produced and can impact the inner surface circularity of liner, and then affects coordinating of follow-up powder metallurgy multiple mounted cam and steel pipe.And the cam structure that the present embodiment provides, due on cam bit 3-1, any point place outward flange is all equal with the vertical range h3 between inward flange, namely the thickness of cam bit is equal everywhere, the thickness of conventional cam at peach tip can not be there is much larger than the situation of basic circle place thickness, therefore the contraction of cam bit is even, the stress produced liner is also uniform, this ensures that there the circularity of liner inner surface, there will not be the situation that circularity is uneven, ensure that coordinating of powder metallurgy multiple mounted cam and steel pipe, do not need to adopt follow-up processing to ensure circularity again, decrease operation, reduce cost.
In the cam structure that the present embodiment provides, preferably the becoming to be grouped into and propose the contoured design of cam bit and liner of cam bit and liner, improve the outer peripheral hardness of cam bit, improve the wearability of cam, ensure that inward flange has applicable hardness simultaneously, and ensure that the circularity of liner basic circle, be convenient to the assembling of liner and follow-up steel pipe, improve moment of torsion, improve product yield, reduce cost.
Be understandable that, above is only a kind of example, and in fact the present embodiment can also have following remodeling.
In preferred mode, the powder metallurgy multiple mounted cam of the present embodiment can have shape as shown in Figure 4.In the cam shown in Fig. 4, the outward flange shape of liner is still similar to the outward flange shape of cam bit 3-1, but similarity degree will lower than the situation shown in Fig. 3.On cam bit 3-1, any point place inward flange is no longer identical with the distance between outward flange, but the thickness of distance h5(between peach tip inward flange and outward flange i.e. peach tip cam bit) increase, be greater than the thickness of distance h4(between basic circle place inward flange and outward flange i.e. basic circle place cam bit).And for a kind of cam, the inward flange of liner to cam bit outward flange between distance fix, cam bit 3-1 increases at the thickness of peach tip, makes the thickness of the peach tip inward flange of liner 3-2 and the distance h6(between outward flange i.e. basic circle place liner) with reduction compared with Fig. 3.In addition, cam bit 3-1 is identical with the material of liner 3-2 with the cam bit 3-1 of above-mentioned Fig. 3 with the structure and material of liner 3-2.
In the cam of this preferred embodiment, thickness due to cam bit 3-1 peach tip is greater than the thickness at basic circle place, reduce at the thickness of peach tip liner 3-2, like this in the sintered combined process of cam bit and liner, the expansion of liner and the contraction of cam bit reach balance, make the inward flange circularity of liner evenly, follow-up with the assembling process of steel pipe in more tight with the combination of steel pipe, improve the performance of cam.
Embodiment two
Present embodiments provide another kind of powder metallurgy multiple mounted cam, Fig. 5 shows its schematic top plan view.As shown in Figure 5, this powder metallurgy multiple mounted cam 4 comprises cam bit 4-1 and liner 4-2.Shown cam bit 4-1 and described liner 4-2 is combined with each other.
In the application of cam, the driving mechanism cooperation such as the cam bit 4-1 needs of cam and the tappet of engine, this needs the outward flange of cam bit 4-1 to have higher hardness, and therefore cam bit 4-1 is made up of the first material in the present embodiment.Described first material is made up of the material of main part and adding material comprising iron, phosphorus and carbon, and described adding material is any one or combination in the elements such as chromium, molybdenum, tungsten, copper, nickel, silicon, manganese.It is chromium is 0 ~ 20% that the one-tenth of described first material is grouped into mass percent, molybdenum is 0 ~ 10%, tungsten is 0 ~ 5%, copper is 0 ~ 15%, nickel is 0 ~ 8%, silicon is 0 ~ 3%, manganese is 0 ~ 3%, phosphorus is 0.1 ~ 1%, carbon is 0.1 ~ 5%, all the other are iron.
In preferred mode, it be chromium is 3 ~ 6% that the one-tenth of the first material is grouped into mass percent, molybdenum is 0.8 ~ 1.5%, copper is 1.5 ~ 2.5%, silicon is 0.3 ~ 0.6%, manganese is 0.3 ~ 0.6%, phosphorus is 0.4 ~ 0.55%, carbon is 2.0 ~ 2.5%, all the other are iron.The cam bit adopting the first material of mentioned component composition and mass percent to make, ensure that to have higher hardness, in the course of work of cam, has excellent wearability, improves the life-span of cam.
In the mode be more preferably, it be chromium is 4 ~ 8% that the one-tenth of the first material is grouped into mass percent, molybdenum is 0.8 ~ 1.5%, copper is 1.5 ~ 2.5%, silicon is 0.3 ~ 0.6%, manganese is 0.3 ~ 0.6%, phosphorus is 0.4 ~ 0.6%, carbon is 2.0 ~ 2.5%, all the other are iron.Adopt the cam bit that the first material of mentioned component composition and mass percent is made, its hardness is higher, and wearability is better.
And in the application of cam, the liner 4-2 of cam needs to be combined with the steel pipe of camshaft, this needs liner 4-2 to have the hardness matched with steel pipe, and therefore liner 4-2 is made up of the second material in the present embodiment.Described second material is made up of the main body and adding material comprising iron and carbon, and described adding material is and any one or combination in the element such as copper, molybdenum, nickel, chromium.It is copper is 0 ~ 30% that the one-tenth of described second material is grouped into mass percent, nickel is 0 ~ 10%, molybdenum is 0 ~ 10%, chromium is 0 ~ 10%, carbon is 0 ~ 3%, all the other are iron.In preferred mode, it be copper is 1.5 ~ 2.5% that the one-tenth of the second material is grouped into mass percent, carbon is 0.6 ~ 0.9%, all the other are iron.
Adopt the liner that the second material of mentioned component composition and mass percent is made, there is the suitable hardness of mating with steel pipe, and medium density, the stress produced in the assembling process of follow-up cam can be absorbed well, prevent the cracking of cam, improve product yield.
As described in Figure 5, the inward flange of cam bit 4-1 has the cam face similar to outward flange, and that is, on cam bit 4-1, any point place outward flange is all equal with the vertical range between inward flange.Identical with the shape of the outward flange of the liner 4-2 of cam bit 4-1 compound and the inward flange of cam bit 3-1, and the shape of the inward flange of liner 3-2 is cam face in this embodiment, to the outward flange of liner 3-2 and the outward flange of cam bit all similar, and the vertical range of liner 3-2 between the outward flange and inward flange of peach tip (namely liner 3-2 is at the thickness of peach tip) equals the vertical range (namely liner 3-2 is at the thickness at basic circle place) between basic circle place outward flange and inward flange.The inward flange of described liner 3-2 has the projection of 0 ~ 30 decile, and the degree of depth of described projection is 0.01 ~ 1.0mm, for the follow-up assembling with steel pipe.
In the process of cam bit and liner compound, because cam bit can exist contraction, certain stress is produced to liner, and the cam structure that the present embodiment provides, due on cam bit 4-1, any point place outward flange is all equal with the vertical range between inward flange, namely the thickness of cam bit is equal everywhere, the thickness of conventional cam at peach tip can not be there is much larger than the situation of basic circle place thickness, therefore in the recombination process of liner and cam bit, the contraction of cam bit is even, and the stress produced liner is also uniform.Simultaneously, in the present embodiment on liner 4-2, any point place outward flange is all equal with the vertical range between inward flange, namely the thickness of liner is equal everywhere, be greater than the thickness at basic circle place at the thickness of peach tip unlike liner in embodiment one, like this in the recombination process of liner and cam bit, the expansion of liner is even, further guarantee liner inward flange indeformable, ensures the precision of liner inward flange.Follow-up with the assembling process of steel pipe, steel pipe is expanded be suitable for the inward flange of liner, realize the assembling with cam.
In the cam structure that the present embodiment provides, preferably the becoming to be grouped into and propose the contoured design of cam bit and liner of cam bit and liner, improve the outer peripheral hardness of cam bit, improve the wearability of cam, ensure that inward flange has applicable hardness simultaneously, and ensure that the precision of inward flange, follow-up with the assembling process of steel pipe, improve moment of torsion, improve product yield, reduce cost.
Embodiment three
Present embodiments provide the preparation method of powder metallurgy multiple mounted cam in embodiment one and enforcement two.
This preparation method comprises the following steps.
First, manufacture cam bit green compact and liner green compact respectively, the raw material of described cam bit green compact are the first material, described first material is made up of the material of main part and adding material comprising iron, phosphorus and carbon, and described adding material is any one or combination in the elements such as chromium, molybdenum, tungsten, copper, nickel, silicon, manganese.It is chromium is 0 ~ 20% that the one-tenth of described first material is grouped into mass percent, molybdenum is 0 ~ 10%, tungsten is 0 ~ 5%, copper is 0 ~ 15%, nickel is 0 ~ 8%, silicon is 0 ~ 3%, manganese is 0 ~ 3%, phosphorus is 0.1 ~ 1%, carbon is 0.1 ~ 5%, all the other are iron.In preferred mode, it be chromium is 3 ~ 6% that the one-tenth of the first material is grouped into mass percent, molybdenum is 0.8 ~ 1.5%, copper is 1.5 ~ 2.5%, silicon is 0.3 ~ 0.6%, manganese is 0.3 ~ 0.6%, phosphorus is 0.4 ~ 0.55%, carbon is 2.0 ~ 2.5%, all the other are iron.
In described first material, add lubricant, the mass percent of described lubricant in described first material is 0.5-1.0%, and adopt three-dimensional material mixer to carry out batch mixing described first material and lubricant, mixing time is 60 minutes, then mistake-40 eye mesh screen.Then adopt the pressure of 450-550MPa to suppress in a mold mixed material, obtain cam bit green compact.The shape of the cam bit green compact obtained is determined by adopted mould, the cam bit that can obtain described in embodiment one or embodiment two by designing mould here.
The raw material of liner green compact is the second material.Described second material is made up of the main body and adding material comprising iron and carbon, and described adding material is and any one or combination in the element such as copper, molybdenum, nickel, chromium.It is copper is 0 ~ 30% that the one-tenth of described second material is grouped into mass percent, nickel is 0 ~ 10%, molybdenum is 0 ~ 10%, chromium is 0 ~ 10%, carbon is 0 ~ 3%, all the other are iron.In preferred mode, it be copper is 1.5 ~ 2.5% that the one-tenth of the second material is grouped into mass percent, carbon is 0.6 ~ 0.9%, all the other are iron.
In described second material, add lubricant, the mass percent of described lubricant in described second material is 0.5-1.0%, and adopt three-dimensional material mixer to carry out batch mixing described second material and lubricant, mixing time is 60 minutes, then mistake-40 eye mesh screen.Then adopt the pressure of 550-600MPa to suppress in a mold mixed material, obtain liner green compact.The shape of the liner green compact obtained is determined by adopted mould, the liner that can obtain described in embodiment one or embodiment two by designing mould here.
In the process of suppressing cam bit green compact and liner green compact respectively, by regulating the Mass adjust-ment cam bit green compact of raw material and the height of liner green compact, make the height of the aspect ratio cam bit green compact of liner green compact little, the height of liner green compact and the height difference of cam bit green compact can set according to the change of the height of liner green compact, in preferred mode, when the height of liner green compact is 11.90 ± 0.02mm, the large 0.2 ~ 0.4mm of height of the aspect ratio liner of cam bit green compact.
The liner green compact suppressed and cam bit green compact are assembled together, are placed on sintering liner plate, the mode of assembling, for place ceramic linings below liner green compact, keeps the height center of liner green compact and cam bit green compact contour, as shown in Figure 6.Here for the structure of the cam in the embodiment two shown in Fig. 5, Fig. 6 is the sectional view of Fig. 5 along A-A' direction.As seen from Figure 6, the two ends up and down of liner green compact have a difference in height h with the two ends up and down of cam bit green compact respectively, and this difference in height h is 1/2 of the difference of the height of aforesaid liner green compact and the height of cam bit green compact.Due in follow-up sintering process, the contraction of cam bit is comparatively large, and such assembling mode can ensure then to obtain the cam bit cam consistent with the height of liner at sintering, can carry out follow-up processing, reduce operation, reduce costs.
Finally, the liner green compact assembled and cam bit green compact are carried out sintering 30 minutes at 1115 DEG C, and atmosphere is hydrogen and nitrogen mixed gas, obtains powder metallurgy multiple mounted cam after cooling.
Embodiment four
Present embodiments provide the another kind of preparation method of powder metallurgy multiple mounted cam in embodiment one and enforcement two.
This preparation method comprises the following steps.
First, manufacture cam bit green compact and liner green compact respectively, cam bit green compact are identical with the manufacturing process described in embodiment three with the manufacturing process of liner green compact.
By the presintering 30 minutes at 950 DEG C respectively of the liner green compact that suppress and cam bit green compact, atmosphere is hydrogen and nitrogen mixed gas.
Because then liner green compact and cam bit green compact have certain intensity respectively through presintering, liner after cooling can being come out of the stove and cam bit adopt forcing press to be assembled together, keep the height center of liner green compact and cam bit green compact contour, do not need under liner green compact, to arrange Ceramics Ceramic liner as in embodiment three.
Finally, the liner green compact assembled and cam bit green compact are carried out sintering 30 minutes at 1115 DEG C, and atmosphere is hydrogen and nitrogen mixed gas, obtains powder metallurgy multiple mounted cam sheet after cooling.
The manufacture method of the powder metallurgy multiple mounted cam that the present embodiment provides, through making liner green compact and cam bit green compact have certain intensity to the presintering of liner green compact and cam bit green compact, make it possible to realize follow-up assembling, the height center holding liner green compact and cam bit green compact can be made contour more accurately, ensure that liner green compact and cam bit in conjunction with precision, reduce following process, obtain the powder metallurgy multiple mounted cam with premium properties.
Embodiment five
Present embodiments provide the preparation method of powder metallurgy multiple mounted cam in embodiment one and enforcement two.
This preparation method comprises the following steps.
First, respectively cam bit material and inner lining material to be prepared burden by mass percentage, batch mixing, with embodiment three.
Extra quality boots cloth is adopted during compacting, first the cam bit material after batch mixing is put into the first material boots, inner lining material after batch mixing is put into the second material boots, during cloth, cam bit material material boots are pushed, outer low punch pulls down, powder is filled in skin, then these material boots are stepped back, inner lining material material boots are pushed, interior low punch pulls down, powder is filled in internal layer, the outer low punch height 0.1mm of the aspect ratio of low punch in setting, then upper punch is suppressed downwards, in upper punch correspondence, there is the projection of a 0.1mm position of low punch, the pressure of 550 ~ 600MPa is adopted to suppress, once obtain the powder metallurgy multiple mounted cam green compact that cam bit and inside lining filling prepare, and ensure liner density>=6.8g/cm
3, the density>=6.0g/cm of cam bit
3, be placed on by the powder metallurgy multiple mounted cam green compact suppressed on sintering liner plate, carry out sintering 30 minutes at 1115 DEG C, atmosphere is hydrogen and nitrogen mixed gas, obtains powder metallurgy multiple mounted cam sheet after cooling.
Adopt the powder metallurgy multiple mounted cam of the method manufacture of this enforcement owing to being suppress cam bit material and liner simultaneously, one-shot forming obtains powder metallurgy multiple mounted cam green compact, in forming process, the material of cam bit and liner intersection has certain diffusion, make in sintering process, the combination of cam bit and liner is more tight, obtains the better powder metallurgy multiple mounted cam of performance.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (19)
1. a powder metallurgy multiple mounted cam, is characterized in that, is made up of two parts:
Cam bit: adopt the first material, comprises outward flange and inward flange, is divided into base circle portion and peach nose part;
Liner: adopt the second material, comprises outward flange and inward flange, is divided into base circle portion and peach nose part;
The inward flange of described cam bit and the outward flange of described liner are combined with each other by metallurgical binding;
Described first material and the second material are different materials;
The outward flange of described liner is identical with the inward flange shape of described cam bit, all similar to the outward flange shape of cam bit, in cam face.
2. powder metallurgy multiple mounted cam according to claim 1, is characterized in that, the shape of the inward flange of described liner is circular; Or similar to the outward flange shape of liner, in cam face.
3. powder metallurgy multiple mounted cam according to claim 2, is characterized in that, the vertical range between the peach tip outer edge of described cam bit is more than or equal to the vertical range between the basic circle place outer edge of cam bit.
4., according to the arbitrary described powder metallurgy multiple mounted cam of claim 1-3, it is characterized in that, the inward flange of described liner has the projection of 0 ~ 30 decile, and the degree of depth of described projection is 0.01 ~ 1.0mm.
5. powder metallurgy multiple mounted cam according to claim 4, is characterized in that, the degree of depth of described projection is 0.1 ~ 0.3mm.
6. according to the arbitrary described powder metallurgy multiple mounted cam of claim 1-3, it is characterized in that, described first material is the combination of iron, phosphorus, carbon and adding material, and described adding material is any one or more in chromium, molybdenum, tungsten, copper, nickel, silicon, manganese element.
7. powder metallurgy multiple mounted cam according to claim 6, it is characterized in that, the one-tenth of described first material is grouped into and with mass percent is: the chromium of 0 ~ 20%, the molybdenum of 0 ~ 10%, 0 ~ 5% tungsten, 0 ~ 15% copper, 0 ~ 8% nickel, 0 ~ 3% silicon, 0 ~ 3% manganese, 0.1 ~ 1% phosphorus, 0.1 ~ 5% carbon, all the other are iron.
8., according to the arbitrary described powder metallurgy multiple mounted cam of claim 1-3, it is characterized in that, described second material is the combination of iron, carbon and adding material, and described adding material is any one or more in copper, molybdenum, nickel, chromium element.
9. powder metallurgy multiple mounted cam according to claim 8, is characterized in that, the one-tenth of described second material is grouped into and with mass percent is: the copper of 0 ~ 30%, the nickel of 0 ~ 10%, 0 ~ 10% molybdenum, 0 ~ 10% chromium, 0 ~ 3% carbon, all the other are iron.
10. a manufacture method for powder metallurgy multiple mounted cam, is characterized in that, carries out according to the following steps:
The first material is adopted to make cam bit green compact;
Adopt second material different from the first material to make liner green compact, the outer peripheral shape of described liner is identical with the inward flange shape of described cam bit and similar to the outward flange shape of cam bit, in cam face;
Described cam bit green compact and liner green compact are nested together;
Sinter the cam bit green compact and liner green compact that nest together, cam bit and liner are welded together.
The manufacture method of 11. powder metallurgy multiple mounted cams according to claim 10, is characterized in that, the low 0.01 ~ 2.00mm of height of the aspect ratio cam bit green compact of described liner green compact.
The manufacture method of 12. powder metallurgy multiple mounted cams according to claim 11, is characterized in that, the low 0.1 ~ 0.5mm of height of the aspect ratio cam bit green compact of described liner green compact.
The manufacture method of 13. powder metallurgy multiple mounted cams according to claim 10, is characterized in that, before described cam bit green compact and liner green compact being nested together, liner green compact and cam bit green compact is carried out to the presintering of 800 ~ 1000 DEG C.
14. according to the manufacture method of the arbitrary described powder metallurgy multiple mounted cam of claim 10-13, it is characterized in that, described first material is the combination of iron, phosphorus, carbon and adding material, and described adding material is any one or more in chromium, molybdenum, tungsten, copper, nickel, silicon, manganese element.
15. according to the manufacture method of the arbitrary described powder metallurgy multiple mounted cam of claim 10-13, and it is characterized in that, described second material is the combination of iron, carbon and adding material, and described adding material is any one or more in copper, molybdenum, nickel, chromium element.
The manufacture method of 16. 1 kinds of powder metallurgy multiple mounted cams, is characterized in that, carries out according to the following steps:
Carry out batch mixing respectively to the powder making cam bit and liner, the batch mixing raw material of described cam bit is made up of the first material, and the batch mixing raw material of described liner forms by from different second materials of the first material;
Extra quality boots cloth is adopted to the powder of the cam bit after batch mixing and liner, suppress described cam bit and described liner simultaneously, once compressingly obtain powder metallurgy multiple mounted cam green compact, in described powder metallurgy multiple mounted cam green compact, the outer peripheral shape of described liner is similar to the outer peripheral shape of described cam bit, in cam face;
Described powder metallurgy multiple mounted cam green compact are sintered, prepares powder metallurgy multiple mounted cam.
The manufacture method of 17. powder metallurgy multiple mounted cams according to claim 16, it is characterized in that, described sintering temperature is 1050 ~ 1250 DEG C, sintering time is 10 ~ 60 minutes, and sintering atmosphere is cracked ammonium, hydrogen or vacuum.
The manufacture method of 18. powder metallurgy multiple mounted cams according to claim 16 or 17, it is characterized in that, described first material is the combination of iron, phosphorus, carbon and adding material, and described adding material is any one or more in chromium, molybdenum, tungsten, copper, nickel, silicon, manganese element.
The manufacture method of 19. powder metallurgy multiple mounted cams according to claim 16 or 17, it is characterized in that, described second material is the combination of iron, carbon and adding material, and described adding material is any one or more in copper, molybdenum, nickel, chromium element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310676876.3A CN104708006A (en) | 2013-12-11 | 2013-12-11 | Powder metallurgy compound cam and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310676876.3A CN104708006A (en) | 2013-12-11 | 2013-12-11 | Powder metallurgy compound cam and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104708006A true CN104708006A (en) | 2015-06-17 |
Family
ID=53408015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310676876.3A Pending CN104708006A (en) | 2013-12-11 | 2013-12-11 | Powder metallurgy compound cam and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104708006A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978220A (en) * | 2014-05-29 | 2014-08-13 | 哈尔滨工具厂 | Composite component powder metallurgical high speed steel and preparation method thereof |
| CN105108460A (en) * | 2015-09-16 | 2015-12-02 | 杭州新坐标科技股份有限公司 | Manufacturing method of cam plate with no need for grinding of outer contour |
| CN105149594A (en) * | 2015-08-31 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy cam and preparation method thereof |
| CN106352044A (en) * | 2016-07-25 | 2017-01-25 | 马勒技术投资(中国）有限公司 | Cam piece with anti-abrasion coating |
| CN106541139A (en) * | 2015-09-18 | 2017-03-29 | 东睦新材料集团股份有限公司 | A kind of preparation method of P/M cam |
| CN106761995A (en) * | 2016-12-20 | 2017-05-31 | 绍兴市上虞春晖内燃机配件有限公司 | Multiple mounted cam piece preparation method and cam bit |
| CN106761996A (en) * | 2016-12-20 | 2017-05-31 | 绍兴市上虞春晖内燃机配件有限公司 | Camshaft |
| CN106761994A (en) * | 2016-12-20 | 2017-05-31 | 绍兴市上虞春晖内燃机配件有限公司 | Multiple mounted cam piece |
| CN107262723A (en) * | 2017-05-19 | 2017-10-20 | 东睦新材料集团股份有限公司 | A kind of preparation method of powder metallurgical gear or belt wheel |
| CN107365937A (en) * | 2017-07-13 | 2017-11-21 | 浙江博星工贸有限公司 | A kind of camshaft and its manufacture method |
| CN107937818A (en) * | 2017-12-12 | 2018-04-20 | 上海魁殊自动化科技有限公司 | Combined type cam and its manufacture method |
| CN107971712A (en) * | 2017-12-29 | 2018-05-01 | 绵阳深度数控科技有限公司 | Cam bit drawing process |
| CN107971486A (en) * | 2017-12-12 | 2018-05-01 | 上海魁殊自动化科技有限公司 | One kind sintering gauge and its application method |
| CN108127122A (en) * | 2017-12-04 | 2018-06-08 | 西安交通大学 | A kind of double material sinter soging parts of composite construction enhancing and preparation method thereof |
| CN106541141B (en) * | 2015-09-18 | 2019-03-12 | 东睦新材料集团股份有限公司 | A kind of manufacturing method of P/M cam |
| CN111575605A (en) * | 2020-05-19 | 2020-08-25 | 湘潭大学 | Stainless steel-based valve seat ring material for CNG engine and preparation method thereof |
| CN112355310A (en) * | 2020-11-12 | 2021-02-12 | 三阳纺织有限公司 | Method for manufacturing cam part and application in textile machinery |
| CN112643034A (en) * | 2020-12-16 | 2021-04-13 | 苏州热工研究院有限公司 | Composite additive manufacturing method of large camshaft |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3232868A1 (en) * | 1981-09-04 | 1983-04-07 | Nippon Piston Ring Co., Ltd., Tokyo | Camshaft |
| JPS6330962B2 (en) * | 1983-08-18 | 1988-06-21 | Mitsubishi Metal Corp | |
| JPS6330961B2 (en) * | 1983-08-13 | 1988-06-21 | Mitsubishi Metal Corp | |
| EP0340128A1 (en) * | 1988-04-28 | 1989-11-02 | Valtubes | Camshaft assembling method and camshaft obtained |
| US4969262A (en) * | 1988-03-17 | 1990-11-13 | Nippon Piston Ring Co., Ltd. | Method of making camshaft |
| JP2003253406A (en) * | 2002-03-01 | 2003-09-10 | Jfe Steel Kk | Highly wear-resistant and high strength sintered parts, and production method thereof |
| US20100224146A1 (en) * | 2005-12-28 | 2010-09-09 | Nippon Piston Ring Co., Ltd. | Method for manufacturing a shaft member having a sintered part bonded thereto and a camshaft for an internal combustion engine |
| CN103032120A (en) * | 2011-09-29 | 2013-04-10 | 北京有色金属研究总院 | Powder metallurgy multiple mounted cam sheet and manufacturing method thereof |
-
2013
- 2013-12-11 CN CN201310676876.3A patent/CN104708006A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3232868A1 (en) * | 1981-09-04 | 1983-04-07 | Nippon Piston Ring Co., Ltd., Tokyo | Camshaft |
| JPS6330961B2 (en) * | 1983-08-13 | 1988-06-21 | Mitsubishi Metal Corp | |
| JPS6330962B2 (en) * | 1983-08-18 | 1988-06-21 | Mitsubishi Metal Corp | |
| US4969262A (en) * | 1988-03-17 | 1990-11-13 | Nippon Piston Ring Co., Ltd. | Method of making camshaft |
| EP0340128A1 (en) * | 1988-04-28 | 1989-11-02 | Valtubes | Camshaft assembling method and camshaft obtained |
| JP2003253406A (en) * | 2002-03-01 | 2003-09-10 | Jfe Steel Kk | Highly wear-resistant and high strength sintered parts, and production method thereof |
| US20100224146A1 (en) * | 2005-12-28 | 2010-09-09 | Nippon Piston Ring Co., Ltd. | Method for manufacturing a shaft member having a sintered part bonded thereto and a camshaft for an internal combustion engine |
| CN103032120A (en) * | 2011-09-29 | 2013-04-10 | 北京有色金属研究总院 | Powder metallurgy multiple mounted cam sheet and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 董玉平等: "《机械设计基础》", 30 September 2012 * |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978220A (en) * | 2014-05-29 | 2014-08-13 | 哈尔滨工具厂 | Composite component powder metallurgical high speed steel and preparation method thereof |
| CN105149594A (en) * | 2015-08-31 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy cam and preparation method thereof |
| CN105108460A (en) * | 2015-09-16 | 2015-12-02 | 杭州新坐标科技股份有限公司 | Manufacturing method of cam plate with no need for grinding of outer contour |
| CN106541139A (en) * | 2015-09-18 | 2017-03-29 | 东睦新材料集团股份有限公司 | A kind of preparation method of P/M cam |
| CN106541141B (en) * | 2015-09-18 | 2019-03-12 | 东睦新材料集团股份有限公司 | A kind of manufacturing method of P/M cam |
| CN106541139B (en) * | 2015-09-18 | 2019-03-12 | 东睦新材料集团股份有限公司 | A kind of preparation method of P/M cam |
| CN106352044B (en) * | 2016-07-25 | 2019-10-25 | 马勒技术投资(中国）有限公司 | Cam bit equipped with wear-resistant coating |
| CN106352044A (en) * | 2016-07-25 | 2017-01-25 | 马勒技术投资(中国）有限公司 | Cam piece with anti-abrasion coating |
| CN106761994B (en) * | 2016-12-20 | 2020-05-19 | 绍兴春晖精密机电有限公司 | Composite cam piece |
| CN106761995B (en) * | 2016-12-20 | 2019-07-19 | 绍兴市上虞春晖内燃机配件有限公司 | Multiple mounted cam piece production method and cam bit |
| CN106761994A (en) * | 2016-12-20 | 2017-05-31 | 绍兴市上虞春晖内燃机配件有限公司 | Multiple mounted cam piece |
| CN106761996A (en) * | 2016-12-20 | 2017-05-31 | 绍兴市上虞春晖内燃机配件有限公司 | Camshaft |
| CN106761995A (en) * | 2016-12-20 | 2017-05-31 | 绍兴市上虞春晖内燃机配件有限公司 | Multiple mounted cam piece preparation method and cam bit |
| CN107262723A (en) * | 2017-05-19 | 2017-10-20 | 东睦新材料集团股份有限公司 | A kind of preparation method of powder metallurgical gear or belt wheel |
| CN107262723B (en) * | 2017-05-19 | 2019-07-12 | 东睦新材料集团股份有限公司 | A kind of preparation method of powder metallurgical gear or belt wheel |
| CN107365937A (en) * | 2017-07-13 | 2017-11-21 | 浙江博星工贸有限公司 | A kind of camshaft and its manufacture method |
| CN108127122A (en) * | 2017-12-04 | 2018-06-08 | 西安交通大学 | A kind of double material sinter soging parts of composite construction enhancing and preparation method thereof |
| CN107971486A (en) * | 2017-12-12 | 2018-05-01 | 上海魁殊自动化科技有限公司 | One kind sintering gauge and its application method |
| CN107937818B (en) * | 2017-12-12 | 2019-09-03 | 浙江力佳缝制设备有限公司 | Combined type cam and its manufacturing method |
| CN107937818A (en) * | 2017-12-12 | 2018-04-20 | 上海魁殊自动化科技有限公司 | Combined type cam and its manufacture method |
| CN107971712A (en) * | 2017-12-29 | 2018-05-01 | 绵阳深度数控科技有限公司 | Cam bit drawing process |
| CN111575605A (en) * | 2020-05-19 | 2020-08-25 | 湘潭大学 | Stainless steel-based valve seat ring material for CNG engine and preparation method thereof |
| CN112355310A (en) * | 2020-11-12 | 2021-02-12 | 三阳纺织有限公司 | Method for manufacturing cam part and application in textile machinery |
| CN112643034A (en) * | 2020-12-16 | 2021-04-13 | 苏州热工研究院有限公司 | Composite additive manufacturing method of large camshaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104708006A (en) | Powder metallurgy compound cam and manufacturing method thereof | |
| CN109695004B (en) | Manufacturing method of iron-based powder metallurgy part | |
| CN102205416B (en) | Manufacture method of engine tappet | |
| CN107186158B (en) | Duplicate gear forging technology and mold based on plate bulk forming | |
| CN109676069B (en) | Precision forging method for nozzle shell | |
| CN102691772A (en) | Gear of starting motor of automobile engine and preparation method of gear | |
| JP2007262536A (en) | Sintered gear and its production method | |
| EP2826577A1 (en) | Mechanical structural component, sintered gear, and methods for producing same | |
| CN104550961A (en) | Hot pressing sintering manufacturing process of polycrystalline diamond wire drawing die | |
| CN112589021A (en) | Manufacturing method of IN718 alloy double-flange high-barrel casing ring piece | |
| US20160023274A1 (en) | Machine part and process for producing same | |
| CN102844556A (en) | Method for producing piston for internal combustion engine and piston that can be produced by means of said method | |
| CN113333755A (en) | Preparation method of powder metallurgy face tooth of angle grinder | |
| CN105234405A (en) | Preparation method for iron-based powder metallurgy part with compact surface | |
| CN207447247U (en) | Double floating type lock ring cold closed-die forging one step forming mould | |
| KR101690516B1 (en) | Polycrystalline diamond compact having multiplex sintered polycrystalline diamond and the manufacturing method thereof | |
| CN103084572A (en) | Forming stamping mold with wear-resistant coating | |
| CN100391648C (en) | Method for manufacturing oil pipe in external upset | |
| CN203156050U (en) | Hot-pressing die used for manufacturing aluminum-iron alloy shaped charge liner | |
| CN102974822B (en) | Hot-pressing mold and method for preparing aluminum-ferrum alloy shaped charge liner by using same | |
| CN204075210U (en) | A kind of automobile clutch disk hub powder metallurgy die | |
| JP2004018958A (en) | Method of producing sintered machine parts | |
| WO2019181417A1 (en) | Sintered machine component, sintered gear, pulley, coupling, sintered machine component manufacturing method, and powder molding mold | |
| KR101447314B1 (en) | Copper liner and manufacturing method for the copper liner | |
| KR20080010562A (en) | Method for manufacturing notch of connecting rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150617 |