CN107931619A - Cam pre-sintering base and its application method - Google Patents
Cam pre-sintering base and its application method Download PDFInfo
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- CN107931619A CN107931619A CN201711305211.6A CN201711305211A CN107931619A CN 107931619 A CN107931619 A CN 107931619A CN 201711305211 A CN201711305211 A CN 201711305211A CN 107931619 A CN107931619 A CN 107931619A
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- sintering
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Gears, Cams (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of cam pre-sintering base, parent metal Fe, including：2.5%≤Cr contents≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si contents≤1.2%, 0.1%≤Zr contents≤0.7%, 0.1%≤W content≤0.7%, and meet at the same time：Cu contents≤0.02%, Mn content≤0.02%, Zr content+W content≤0.4 ×（C content+Si contents）.The cam pre-sintering base is assemblied in the concave part on the cams mounted position of mandrel material needs when in use, one layer of copper alloy sheet of middle pad, which is sintered, obtains the camshaft that is firmly combined with, and the component of the copper alloy sheet is according to the Composition Control of the cam pre-sintering base.
Description
Technical field
This application involves powder metallurgical technology, and in particular to a kind of cam pre-sintering base and its application method, this is convex
The pre-sintered base of wheel is mainly for the manufacture of cam and the sintered combined camshaft of mandrel.
Background technology
Powder metallurgy is to produce metal dust or use metal dust（Or the mixture of metal dust and non-metal powder）Make
For raw material, by shaping and sintering, the technology of manufacture metal material, composite material and all kinds product.Powder smelting
Gold process protrude the advantages of be can easily realize polytype material compound or a variety of component it is compound, before realization
Person's compound tense, can make material give full play to the respective characteristic of each constituent element, when realizing the latter's compound tense, it is possible to achieve various common
Connection, reparation or the manufacture that processing technology can not be realized.
Camshaft is engine air distribution system key components and parts, and powder metallurgy combined sintering technique is a kind of new combination
Formula camshaft preparation process, the integral type solid camshaft produced relative to tradition such as casting, forging technology, Combined cam
Axis has a variety of advantages such as hollow structure loss of weight is obvious, dimensional accuracy is high, allowance is small, flexible design, energy-saving material-saving, extensively
Applied to a variety of medium and high classes petrol engines and diesel engine.At present, in the automobile camshaft of the country such as America and Europe production, powder
Last metallurgy camshaft account for significant proportion, and in the domestic camshaft in China, powder metallurgy camshaft is still not reaching to industry
Scale, but China some related manufacturing enterprises or colleges and universities, research institute have also carried out a series of research of powder metallurgy camshafts, example
As 201510599200.8 Chinese patent application of Application No. is related to a kind of preparation method of P/M cam, by cam green compact
Inside and outside two parts are divided into, cam outer ring uses high-carbon sintered steel, and cam inner ring is low-carbon sintered steel, respectively by above-mentioned mixed powder
It is 6.5~7.4g/cm3's that cam outer ring green compact that density is 6.25~7.4g/cm3 and density are pressed on press
Cam inner ring green compact, the endoporus of the inner ring embedded cam outer ring of cam sinter, heat treatment, will be sintered according to technical requirements and hot
Defined size is processed and be ground to the cam mechanism of processing.
The above-mentioned technology for using different performance powdered metallurgical material to combine cam outer ring, inner ring has actually been ability
The technology of research is set about in domain already, and this kind of technical concerns point is the differentiation design of the Internal and external cycle strength of materials, to material in itself
Intensity, machinability and sinterability etc. between relation do not have deep announcement, also proposed not in terms of sintering process more effective
Suggestion, itself also there are complex process, it is of high cost the defects of.
The content of the invention
To solve the above problems, the present invention proposes a kind of cam pre-sintering base and its application method, improve mandrel with
On the basis of the sintering Joining Technology of cam, closely related powder is needed with bonding strength and working performance by rationally designing
Raw material, the sintering camshaft product of high-quality is obtained using lower cost.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of cam pre-sintering base, which is Fe, it include following percentage by weight into
Point：2.5%≤Cr contents≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si content≤1.2%, and meet at the same time：Cu
Content≤0.02%, Mn content≤0.02%.
Above-mentioned cam pre-sintering base, further includes the component of following percentage by weight：0.1%≤Zr contents≤0.7%, 0.1%
≤ W content≤0.7%, and meet at the same time：Zr contents+W content≤0.4 ×（C content+Si contents）.
Above-mentioned cam pre-sintering base, is through mixed powder by the metal dust of each component or pre-alloyed powder --- it is cold-pressed into
The step of type --- hot pressed sintering or pressureless sintering, is made, and the temperature of the hot pressed sintering or pressureless sintering is no more than 1000
DEG C, sintering time is no more than 90min.
The application method of above-mentioned cam pre-sintering base, including：Select the diameter seamless pipe identical with required cam shaft diameter
As mandrel material, the mandrel material is machined or chemical attack, it would be desirable to be processed at cams mounted position
Concave part, one layer of copper alloy sheet is wrapped up in the concave part, and the cam pre-sintering base is thin installed in copper alloy is enclosed with
The concave part of piece obtains assembly parts, and the assembly parts are put into sintering furnace and are sintered, pre-sintered by the cam
Soldering caused by the effect of further sintering shrinkage and copper alloy sheet fusing of base is acted on the cam pre-sintering base
Firm one is combined into the mandrel.
The application method of above-mentioned cam pre-sintering base, the component of the copper alloy sheet used include at least 2.0% at most
4.0% Mn, and meet at the same time：Cu content >=90.0%, Zn content+Sn content≤5.0%, Si content≤2.0%.
The beneficial effects of the present invention are：
1st, the present invention is based on the improvement to the sintered combined technique of camshaft, select special component cam pre-sintering base and finished product without
Slit-tube is sintered compound, bond strength height, and process costs are low；
2nd, cam pre-sintering base of the invention, when in use, compared with prior art, important improvement point be to mandrel material into
Row mechanical processing or chemical attack, it would be desirable to which concave part is processed at cams mounted position, on the one hand which saves
In cleaning of the assembling link to mandrel assembling position and polishing step, it is most important that construct the sintered surface of cam and mandrel
Mechanical snap, the depression can be completely enclosed by designing follow-up sintering dynamic process to the structural dimension optimization of concave part
Portion, makees by soldering caused by the effect of further sintering shrinkage and copper alloy sheet fusing of the cam pre-sintering base
Firm one is combined into by the cam pre-sintering base and the mandrel；
3rd, cam pre-sintering base of the invention, on component, since the machinery of the sintered surface by constructing cam and mandrel is stung
Close and the cam pre-sintering base and the mandrel are combined into firm one in sintering, therefore Cr, C etc. can be contained
Within the scope of amount is limited to reasonably, without making these constituent contents become very to improve the intensity of sintered interface merely
Height, so as to influence processing performance, by the restriction to Zr, W equal size, avoids the enrichment of simple carbide, and by institute
State the limitation of Cu and Mn and the restriction to Cu and Mn in copper alloy sheet component in cam pre-sintering base component so that Cu and Mn
Concentrate on the sintered interface of the cam and mandrel with being more likely to, so that it is crisp under mechanical load or impact to reduce sintered interface
Property so that intensity, machinability and the sinterability of sintered products obtain the coordinating and unifying.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole attached drawing, identical component is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the cam pre-sintering blank structure schematic diagram of the present invention.
Fig. 2 is assembling structure schematic diagram of the cam pre-sintering base of the present invention when complex sintered with mandrel.
Component in figure representated by each reference numeral is：1st, mandrel, 2, copper alloy sheet, 3, cam pre-sintering base.
Embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.Conversely, there is provided these embodiments are to be able to be best understood from the disclosure, and can be by this public affairs
The scope opened completely is communicated to those skilled in the art.
Embodiment 1
A kind of cam pre-sintering base, which is Fe, it includes the component of following percentage by weight：
2.5%≤Cr contents≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si content≤1.2%, and meet at the same time：Cu contents
≤ 0.02%, Mn content≤0.02%.
Above-mentioned cam pre-sintering base, further includes the component of following percentage by weight：0.1%≤Zr contents≤0.7%, 0.1%
≤ W content≤0.7%, and meet at the same time：Zr contents+W content≤0.4 ×（C content+Si contents）.
Above-mentioned cam pre-sintering base, is through mixed powder by the metal dust of each component or pre-alloyed powder --- it is cold-pressed into
The step of type --- hot pressed sintering or pressureless sintering, is made, and the temperature of the hot pressed sintering or pressureless sintering is no more than 1000
DEG C, sintering time is no more than 90min.
The application method of above-mentioned cam pre-sintering base, includes the following steps in use：
Step 1, the diameter seamless pipe identical with required cam shaft diameter is selected to cut into required length as 1 material of mandrel, it is right
Notch is cleared up or is polished, and the cutting mode is to cut saw cut, plasma cut or laser cutting, the seamless tubular goods
Matter is carbon steel；
Step 2, mark is carried out to the mandrel material that step 1 obtains, needs cams mounted position to mark；
Step 3, the mandrel material obtained to step 2 is machined or chemical attack, the needs that will be marked
Slight concave part is processed at cams mounted position, and the slight concave part refers to that depth dimensions is 0.2-1.0 millimeters
Concave part；
Step 4, the concave part of 1 material of the mandrel obtained in step 3 wraps up one layer of copper alloy sheet 2, and the copper closes
The thickness of golden thin slice 2 is 0.25-1.2 millimeters；
Step 5, the mandrel 1 that the prefabricated cam pre-sintering base is obtained with step 4 is assembled, the cam is pre-
Sintered blank, which is installed on, is enclosed with the concave part of copper alloy sheet 2, the axial length of the cam pre-sintering base with it is described concave
Axial length is adapted to, and is equal or slightly larger than length of the copper alloy sheet 2 on the axial direction, described slightly larger than referring to surpass
The size Control gone out is within 4 millimeters；
Step 6, assembly parts step 5 obtained, which are put into sintering furnace, to be sintered, first with the heating rate not less than 9 DEG C/min
940 DEG C of -980 DEG C of insulation 5-30min are risen to, then 1070 DEG C of -1190 DEG C of insulation 25- are risen to the heating rate of 5-10 DEG C/min
300min, by pricker caused by the effect of further sintering shrinkage and copper alloy sheet fusing of the cam pre-sintering base
The cam pre-sintering base and the mandrel are combined into firm one by weldering effect；
Step 7, the cam of the sintered products obtained to step 6 finishes, and gets product.
The application method of above-mentioned cam pre-sintering base, the component of the copper alloy sheet used include at least 2.0% at most
4.0% Mn, and meet at the same time：Cu content >=90.0%, Zn content+Sn content≤5.0%, Si content≤2.0%.
Embodiment 2
The embodiment is the restriction to cam pre-sintering base component in embodiment 1, it includes the component of following percentage by weight（Base
Body is Fe）：Cr contents are 2.5%, and C content 3.5%, Si contents are that 0.6%, Zr contents are 0.2%, and W content 0.5%, Cu contains
It is 0.01% to measure as 0.01%, Mn contents.
Embodiment 3
The difference of the embodiment and embodiment 2 is, the cam pre-sintering base, it include following percentage by weight into
Point（Matrix is Fe）：Cr contents are 3.9%, and C content 2.0%, Si contents are that 1.1%, Zr contents are 0.7%, and W content is
0.1%, Cu content are that 0.01%, Mn contents are 0.01%.
Embodiment 4
The difference of the embodiment and embodiment 2 is, the cam pre-sintering base, it include following percentage by weight into
Point（Matrix is Fe）：Cr contents are 3.2%, and C content 2.8%, Si contents are that 0.9%, Zr contents are 0.4%, and W content is
0.3%, Cu content are that 0.01%, Mn contents are 0.01%.
Embodiment 5
The embodiment is the restriction to the component of copper alloy sheet 2 described in embodiment 2-4, the component of the copper alloy sheet 2
Including 4.0% Mn, 4.0% Zn, remaining is Cu and inevitable impurity.
Embodiment 6
The present embodiment difference from Example 5 is：The component of the copper alloy sheet 2 includes 2.0% Mn, 2.0% Zn,
2.0 Sn, 1.0% Si, remaining is Cu and inevitable impurity.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (6)
1. a kind of cam pre-sintering base, which is Fe, it includes the component of following percentage by weight：
2.5%≤Cr contents≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si content≤1.2%, and meet at the same time：Cu contents
≤ 0.02%, Mn content≤0.02%.
2. a kind of cam pre-sintering base according to claim 1, it is characterised in that above-mentioned cam pre-sintering base, further includes
The component of following percentage by weight：0.1%≤Zr contents≤0.7%, 0.1%≤W content≤0.7%, and meet at the same time：Zr contents
+ W content≤0.4 ×（C content+Si contents）.
A kind of 3. cam pre-sintering base according to claim 1 or 2, it is characterised in that above-mentioned cam pre-sintering base, be by
The metal dust or pre-alloyed powder of each component are through mixed powder --- cold moudling --- hot pressed sintering or pressureless sintering the step of system
Form.
4. a kind of cam pre-sintering base according to claim 3, it is characterised in that the hot pressed sintering or pressureless sintering
Temperature is no more than 1000 DEG C, and sintering time is no more than 90min.
A kind of 5. application method of the cam pre-sintering base described in claim 2, it is characterised in that including：Select diameter and institute
The identical seamless pipe of cam shaft diameter is needed as mandrel material, the mandrel material is machined or chemical attack, will
Need cams mounted position to be processed into concave part, one layer of copper alloy sheet is wrapped up in the concave part, by the cam pre-burning
Knot base is installed on the concave part acquisition assembly parts for being enclosed with copper alloy sheet, and the assembly parts are put into sintering furnace and are carried out
Sintering, by soldering caused by the effect of further sintering shrinkage and copper alloy sheet fusing of the cam pre-sintering base
The cam pre-sintering base and the mandrel are combined into firm one by effect.
A kind of 6. application method of the cam pre-sintering base described in claim 5, it is characterised in that the copper alloy sheet into
Point include at least 2.0% at most 4.0% Mn, and meet at the same time：Cu content >=90.0%, Zn content+Sn contents≤5.0%, Si contain
Amount≤2.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305211.6A CN107931619B (en) | 2017-12-11 | 2017-12-11 | Cam is pre-sintered base and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305211.6A CN107931619B (en) | 2017-12-11 | 2017-12-11 | Cam is pre-sintered base and its application method |
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| Publication Number | Publication Date |
|---|---|
| CN107931619A true CN107931619A (en) | 2018-04-20 |
| CN107931619B CN107931619B (en) | 2019-11-29 |
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| CN201711305211.6A Active CN107931619B (en) | 2017-12-11 | 2017-12-11 | Cam is pre-sintered base and its application method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022099686A1 (en) * | 2020-11-12 | 2022-05-19 | 三阳纺织有限公司 | Cam component manufacturing method and use in textile machines |
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| CN85105131A (en) * | 1985-07-06 | 1986-12-31 | 日本柱塞环株式会社 | Method of manufacturing a camshaft |
| US4998955A (en) * | 1988-05-23 | 1991-03-12 | Nippon Piston Ring Co., Ltd. | Assembled camshaft |
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| WO2022099686A1 (en) * | 2020-11-12 | 2022-05-19 | 三阳纺织有限公司 | Cam component manufacturing method and use in textile machines |
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| CN107931619B (en) | 2019-11-29 |
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Effective date of registration: 20191108 Address after: Taizhou City, Zhejiang province 317500 Wenling City Ruo Heng Zhen Pu tou Cun Guang Chang Lu Applicant after: Wenling Dingli Standard Parts Co.,Ltd. Address before: 201318 4th Floor, Building 1-9, Lane 99, Shenmei Road, Pudong New Area, Shanghai Applicant before: SHANGHAI KUISHU AUTOMATION TECHNOLOGY CO.,LTD. |
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Denomination of invention: Cam pre-sintered blank and method of using the same Effective date of registration: 20220812 Granted publication date: 20191129 Pledgee: Zhejiang Wenling Rural Commercial Bank Co.,Ltd. Pledgor: Wenling Dingli Standard Parts Co.,Ltd. Registration number: Y2022330001730 |