CN107398555A - A kind of P/M cam and preparation method thereof - Google Patents
A kind of P/M cam and preparation method thereof Download PDFInfo
- Publication number
- CN107398555A CN107398555A CN201710574510.3A CN201710574510A CN107398555A CN 107398555 A CN107398555 A CN 107398555A CN 201710574510 A CN201710574510 A CN 201710574510A CN 107398555 A CN107398555 A CN 107398555A
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- CN
- China
- Prior art keywords
- cam
- powder
- green compact
- binding agent
- preparation
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- 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.)
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Classifications
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a kind of P/M cam and preparation method thereof, it is related to powder metallurgical technology.Suppressed, after low-temperature setting cam by cam by adding binding agent in cam material powder, cam green compact have more than 15MPa intensity and more than 0.5 ‰ drawing deformation.It can ensure that cam green compact are transporting and do not falling side in assembling process, do not ftracture, so as to realize the direct elastic conjunction of cam green compact, and the sintered rear performance of cam is suitable with traditional handicraft.Therefore the technique can substitute the technique assembled again after traditional pre-sintering, reduce equipment investment, reduce energy consumption, so that production cost reduces, and solve the problems, such as the cam dimension deterioration in accuracy after pre-burning.
Description
Technical field
The invention belongs to powder metallurgical technology, more particularly to a kind of P/M cam and preparation method thereof.
Background technology
Assembled powder metallurgy camshaft is that camshaft is resolved into P/M cam, mandrel (generally steel by one kind
Pipe), axle journal etc. several can assembly parts, carry out optimization of material and finishing respectively, then make cam and core through special process again
Axle is connected with each other the novel camshaft preparation method for being combined into axle.This method has light weight, can flexible design and processing, wear-resisting
The advantages that property is good, it is now widely used for the engine of automobile and motorcycle.
It is well known that powdered metal parts green strength is low, fragility is big, therefore cam green compact are easily being transported, assembled
Cheng Fasheng ruptures.Assembled powder metallurgy camshaft needs to carry out cam the pre-sintered processing of high temperature in assembling at present, makes powder
Metallurgical binding occurs between last particle to be assembled again after improving the intensity of cam.Above-mentioned technique increases equipment investment, simultaneously
Energy consumption is also increased, so that production cost improves, and the cam dimension deterioration in accuracy after pre-burning.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, to propose a kind of P/M cam and preparation method thereof, should
Cam just has high intensity and toughness in green state, it is ensured that cam green compact transport and assembling process in do not fall side, no
Cracking, so as to realize the direct assembling of cam green compact.
P/M cam provided by the invention, it is characterised in that the P/M cam has under green state
More than 15MPa green strength and more than 0.5 ‰ drawing deformation.And the P/M cam powder stock is by following quality
The each component of percentage is prepared：
(1) 90%~99% metallic matrix powder
(2) 0.1%~10% binding agent
(3) 0%~9.9% powdered graphites
(4) 0%~5% lubricant
The metallic matrix powder includes iron-based powder, matrix powder, nickel base powder or cemented carbide powder.
The binding agent includes one in epoxy resin, phenolic resin, polyurethane, furane resins, polytetrafluoroethylene (PTFE), rubber
Kind or its combination.
The lubricant is the field of powder metallurgy conventional lubricants such as zinc stearate, EBS waxes.
A kind of preparation method of P/M cam, preparation process are as follows：
(1) binding agent is added in powder mixing process, binding agent is added in a manner of solid powder or with liquid spray
Mode add；
(2) powder being well mixed in step (1) is put into mould and carries out compression molding, obtain cam green compact；
(3) the cam green compact obtained in step (2) are subjected to low-temperature setting, solidification temperature is 80 DEG C~250 DEG C, during solidification
Between more than 30min.
Beneficial effects of the present invention：P/M cam green compact prepared by the present invention have high intensity and toughness, can be with
Ensure that cam green compact are transporting and do not falling side in assembling process, do not ftracture, so as to realize the direct assembling of cam green compact, and it is convex
It is suitable with traditional handicraft to take turns sintered rear performance.Therefore the technique can substitute pre-sintering process, reduce equipment investment, reduce
Energy consumption, so that production cost reduces, and solves the problems, such as the cam dimension precision difficulty after pre-burning.
Embodiment
The present invention is described in more detail below.
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are simply the speciality and advantage of the further explanation present invention, rather than to the claims in the present invention
Limitation.
Embodiment 1
A kind of preparation process of camshaft prepared by P/M cam and thus cam is as follows：
(1) 97.0%ASTALOY-E alloyed powders, 2.0% graphite and 1.0% epoxy powder are put into batch mixer, mix
Taken out after closing 2 hours；
(2) powder being well mixed in step (1) is put into mould and carries out die forming, molding pressure 450MPa, pressure
Taken out after system, obtain cam green compact；
(3) green compact that step (2) obtains being placed in air dry oven and solidified, solidification temperature is 120 DEG C,
(4) hardening time is 120min, furnace cooling, is taken out；
(5) green compact are made into axle in the enterprising luggage of camshaft assembly machine after the solidification for obtaining step (3), and the assembling magnitude of interference is
0.04mm；
(6) camshaft that step (4) obtains being placed in vacuum sintering furnace and carries out high-temperature calcination, temperature is 1098 DEG C, when
Between be 2 hours, after cooling take out obtain by cam green compact assembling obtain powder metallurgy camshaft blank.
Embodiment 2
Camshaft prepared by a kind of P/M cam and thus cam, preparation process are as follows：
(1) 1.5% epoxy resin and 0.5% polyurethane are dissolved in ethyl acetate and obtain binder solution；
(2) by 84.0% (mass fraction, similarly hereinafter) atomized iron powder, 3.0% copper powder, 3.0% graphite, 6.0% ferrochrome,
2.0% ferrophosphorus is put into batch mixer, and after being pre-mixed 0.5 hour, binder solution is added by way of spraying, is done in mixing
It is dry, finally obtain the bond powders of evenly drying；
(3) powder being well mixed in step (2) is put into mould and carries out compression molding, molding pressure 600MPa, pressure
Taken out after system, obtain cam green compact；
(4) green compact that step (3) obtains are placed in air dry oven and solidified, solidification temperature is 120 DEG C, and hardening time is
150min, furnace cooling, take out；
(5) green compact are made into axle in the enterprising luggage of camshaft assembly machine after the solidification for obtaining step (4), and the assembling magnitude of interference is
0.06mm；
(6) camshaft that step (5) obtains being placed in vacuum sintering furnace and carries out high-temperature calcination, temperature is 1098 DEG C, when
Between be 2 hours, after cooling take out obtain by cam green compact assembling obtain powder metallurgy camshaft blank.
The P/M cam green strength that is obtained to above-described embodiment, the density for breaking cam after deformation rate and sintering
Tested with hardness, in order to more directly illustrate the technique effect of the present invention, will not add the customary preparation methods of binding agent
Group as a comparison.As a result it is as shown in table 1.
The cam green strength of table 1, break cam density and hardness after deformation rate and sintering
Therefore, P/M cam green compact provided by the invention have good intensity and break deformation rate, can be achieved convex
The green compact elastic conjunction of wheel shaft, and the sintered rear performance of cam is suitable with traditional handicraft.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
It will not be limited and the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The widest range of cause.
Claims (5)
1. a kind of P/M cam, it is characterised in that the P/M cam has more than 15MPa's under green state
Intensity and more than 0.5 ‰ drawing deformation；The powder stock of the P/M cam by following mass percent each group
Divide and be prepared：
90%~99% metallic matrix powder
0%~9.9% powdered graphite
0.1%~10% binding agent
0%~5% lubricant.
2. cam according to claim 1, it is characterised in that the metallic matrix powder include iron-based powder, matrix powder,
Nickel base powder or cemented carbide powder.
3. cam according to claim 1, it is characterised in that the binding agent includes epoxy resin, phenolic resin, poly- ammonia
One kind or its combination in ester, furane resins, polytetrafluoroethylene (PTFE), rubber.
4. cam according to claim 1, it is characterised in that the lubricant includes zinc stearate or EBS waxes.
5. the preparation method of P/M cam described in a kind of claim 1, it is characterised in that preparation process is as follows：
(1) binding agent is added in powder mixing process, binding agent is added in a manner of solid powder or the side with liquid spray
Formula adds；
(2) powder being well mixed in step (1) is put into mould and carries out die forming, obtain cam green compact；
(3) the cam green compact obtained in step (2) are subjected to low-temperature setting, solidification temperature is 80 DEG C~250 DEG C, and hardening time surpasses
Cross 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574510.3A CN107398555A (en) | 2017-07-14 | 2017-07-14 | A kind of P/M cam and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574510.3A CN107398555A (en) | 2017-07-14 | 2017-07-14 | A kind of P/M cam and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107398555A true CN107398555A (en) | 2017-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710574510.3A Pending CN107398555A (en) | 2017-07-14 | 2017-07-14 | A kind of P/M cam and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868422A (en) * | 2019-03-14 | 2019-06-11 | 有研粉末新材料（北京）有限公司 | A kind of powder metallurgy firm gear and preparation method thereof |
| CN111644628A (en) * | 2019-11-25 | 2020-09-11 | 浙江百达精工股份有限公司 | Method for manufacturing powder metallurgy parts |
| CN114226714A (en) * | 2021-12-17 | 2022-03-25 | 武汉苏泊尔炊具有限公司 | Powder metallurgy material, preparation method and application thereof |
| CN115255369A (en) * | 2022-09-26 | 2022-11-01 | 扬州保来得科技实业有限公司 | Preparation method of powder metallurgy cam lock for head-up type cook machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59206605A (en) * | 1983-02-24 | 1984-11-22 | オ−トモビル・シトロエン | Cam shaft for internal combustion engine |
| CN85105131A (en) * | 1985-07-06 | 1986-12-31 | 日本柱塞环株式会社 | Method of manufacturing a camshaft |
| JPH03253501A (en) * | 1990-03-05 | 1991-11-12 | Toyota Motor Corp | Production of green compact molding body |
| CN1858288A (en) * | 2006-06-06 | 2006-11-08 | 吉林大学 | Sintered metal material for assembled hollow camshaft and cam and its preparing and treating method |
| CN101368250A (en) * | 2008-09-08 | 2009-02-18 | 四川大学 | Rare earth additive high-carbon content cam material and powder metallurgy combined hollow camshaft |
| CN104385619A (en) * | 2014-09-09 | 2015-03-04 | 西安航空动力股份有限公司 | Manufacturing method for aeroengine composite material fan blade |
| CN105848812A (en) * | 2013-11-06 | 2016-08-10 | 美国鲁吉斯新泽西州立大学 | Production of monolithic bodies from a porous matrix using low temperature solidification in an additive manufacturing process |
-
2017
- 2017-07-14 CN CN201710574510.3A patent/CN107398555A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59206605A (en) * | 1983-02-24 | 1984-11-22 | オ−トモビル・シトロエン | Cam shaft for internal combustion engine |
| CN85105131A (en) * | 1985-07-06 | 1986-12-31 | 日本柱塞环株式会社 | Method of manufacturing a camshaft |
| JPH03253501A (en) * | 1990-03-05 | 1991-11-12 | Toyota Motor Corp | Production of green compact molding body |
| CN1858288A (en) * | 2006-06-06 | 2006-11-08 | 吉林大学 | Sintered metal material for assembled hollow camshaft and cam and its preparing and treating method |
| CN101368250A (en) * | 2008-09-08 | 2009-02-18 | 四川大学 | Rare earth additive high-carbon content cam material and powder metallurgy combined hollow camshaft |
| CN105848812A (en) * | 2013-11-06 | 2016-08-10 | 美国鲁吉斯新泽西州立大学 | Production of monolithic bodies from a porous matrix using low temperature solidification in an additive manufacturing process |
| CN104385619A (en) * | 2014-09-09 | 2015-03-04 | 西安航空动力股份有限公司 | Manufacturing method for aeroengine composite material fan blade |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868422A (en) * | 2019-03-14 | 2019-06-11 | 有研粉末新材料（北京）有限公司 | A kind of powder metallurgy firm gear and preparation method thereof |
| CN111644628A (en) * | 2019-11-25 | 2020-09-11 | 浙江百达精工股份有限公司 | Method for manufacturing powder metallurgy parts |
| CN111644628B (en) * | 2019-11-25 | 2022-07-05 | 浙江百达精工股份有限公司 | Method for manufacturing double-row gear teeth |
| CN114226714A (en) * | 2021-12-17 | 2022-03-25 | 武汉苏泊尔炊具有限公司 | Powder metallurgy material, preparation method and application thereof |
| CN115255369A (en) * | 2022-09-26 | 2022-11-01 | 扬州保来得科技实业有限公司 | Preparation method of powder metallurgy cam lock for head-up type cook machine |
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Application publication date: 20171128 |