CN101178102A - Wet-type copper based powder metallurgy friction wafer and manufacturing method - Google Patents
Wet-type copper based powder metallurgy friction wafer and manufacturing method Download PDFInfo
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- CN101178102A CN101178102A CNA2007101571575A CN200710157157A CN101178102A CN 101178102 A CN101178102 A CN 101178102A CN A2007101571575 A CNA2007101571575 A CN A2007101571575A CN 200710157157 A CN200710157157 A CN 200710157157A CN 101178102 A CN101178102 A CN 101178102A
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Abstract
The invention provides a wet copper basic powder metallurgy friction disc and a manufacture method. The friction disc mainly consists of a middle steel core plate and at least a side upper friction layer; at least one surface of the steel core plate is combined with a rubber film layer which is composite with a friction layer; the manufacture method at least comprises friction layer material distributing, mixed material, pressing-typed, burning, assembly with the steel core plate, and oil trough processing. The invention is characterized in that no pressure burning in a continuous burning furnace is adopted for burning; the friction layer after burning is dipped in rubber in a vacuum rubber dipping trough in normal temperature and is dried and assembled with the steel core plate; before the assembly, the surface of the steel core plate is coated; after assembly, the pressurization and solidification are carried out on a slab vulcanizing machine; the invention has the advantages of high efficiency of processing technique, low cost, increasing the hardness and strength, high size precision, etc.
Description
Technical field
What the present invention relates to is a kind of gearing friction sheet and manufacture method, especially a kind of friction plate and manufacture method of forming with the copper-base powder metallurgy manufacturing that is used for drive clutch.
Background technique
Friction plate is one of most important part in the various machinery, and they utilize frictional force to carry out work, and friction plate will be worked reliably, must have enough height and stable friction factor, and wear resistance, heat resistance, mechanical strength height can not killed with mating plate.Friction plate can be divided into metal by material, and is fiber reinforced resin based, as asbestos, semimetal, no asbestos, paper substrate, carbon back, or powder metallurgy friction material etc.Powder metallurgy friction material finds broad application owing to all having high heat resistance, friction factor and wear resistance in various operating conditions.The application area of Wet-type copper based powder metallurgy friction wafer is enlarging always, its advantage is in conjunction with steady, high, the long service life of wear resistance, its is general adopts that to press firing technique, technological process be the batching → batch mixing → die mould → process with copper plated steel central layer assembly unit → pressure sintering → oil groove of friction layer; Forming a kind of centre is a copper plated steel central layer 11, and the equal pressure sintering of upper and lower surface has the friction plate of friction layer 12, and it is to have one deck copper layer 13 on the surface of steel core plate 1 at least, sees shown in the accompanying drawing 1.Described pressure sintering sees shown in the accompanying drawing 2 that it is to carry out in a pressure cowling 14, friction plate 15 places between the pressure transmission backing plate 16 up and down, is furnished with the oil hydraulic cylinder 17 that can press thereon above the pressure cowling 14.To close intensity higher though above-mentioned pressure firing technique makes friction layer and steel core harden, but still there are many shortcomings, as steel core plate hardness and intensity reduction after sintering annealing, must increase energy consumption with the pressure transmission backing plate during pressure sintering, product is prone to presses partially, low melting point composition in the friction layer easily is extruded out, be commonly called as out the alloy knurl, thereby reduced the friction plate frictional behaviour, influenced the appearance quality of product, cycle is longer, and cost is higher.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existence, and provide a kind of steel core plate of friction plate that adopts without copper facing, friction layer pressureless sintering can be carried out at mesh-belt furnace with generally the powder metallurgy pressed compact is the same, manufacture cycle is shorter, Wet-type copper based powder metallurgy friction wafer that cost of production is low and manufacture method.
The objective of the invention is to finish by following technical solution, a kind of Wet-type copper based powder metallurgy friction wafer, it mainly is made up of friction layer on the steel core plate of centre and at least one side, described steel core plate be combined with one deck adhesive film on the one side at least, and on adhesive film, be compounded with one deck friction layer again.
Respectively be combined with one deck adhesive film on the upper and lower surface of described steel core plate, and on adhesive film, be compounded with one deck friction layer more separately; Hole in friction layer contains the modified alkyd resin glue that has solidified.
A kind of manufacture method of Wet-type copper based powder metallurgy friction wafer, this method comprises friction layer batching, batch mixing, die mould, sintering at least, processes with the assembly unit of steel core plate, oil groove, it is characterized in that described sintering adopts pressureless sintering in continuous fritting furnace, friction layer behind the sintering is also dried behind the normal temperature impregnation in the vacuum-latexed groove and is formed, splice with the steel core plate then, before splicing, earlier to steel core plate surface coating; Make behind cure under pressure on the vulcanizing press splicing back.
Described friction layer normal temperature impregnation 50--70 minute in the vacuum-latexed groove, glue be YSM-1 with acetone diluted to concentration 50%, under 80-95 ℃ of temperature, dry, solidified 50-70 minute at 150-160 ℃ again.
Described friction layer and gluing thickness were solidifying 8-12 minute under 160-180 ℃, 0.5-1.2Mpa pressure on the vulcanizing press in the superimposed back of the steel core plate assembly unit of 0.05-0.1mm.
The present invention since central layer without copper facing and need not be with the friction layer sintering, cost of production can reduce more than 30%; Compare with existing pressure firing technique, adhesion process friction plate friction layer porosity is higher, thereby friction factor is also higher relatively.The most outstanding a bit is: the invar central layer can be because of special user's requirement not with the friction layer high temperature sintering, and the processing central layer has the friction material (tratitional technology can't be accomplished this point) of hardness, and dimensional accuracy can keep original machining level.
The present invention compared with prior art, have following several characteristics: the one, the prior powder metallurgy friction plate is to adopt pressure sintering to realize the metallurgy combination of friction layer and steel core plate, the friction layer porosity ratio is low behind this method sintering, is about 8-12%, coefficient of kinetic friction 0.05-0.06 in oil; And the present invention adopts is continous way pressureless sintering, this process efficiency height, and the porosity ratio height of friction layer is about 20-30%, helps improving the coefficient of kinetic friction in oil; The friction plate of explained hereafter of the present invention coefficient of kinetic friction in oil is 0.055-0.07.
The 2nd, the steel core plate reduces cost without copper facing; Tratitional technology is closed intensity for guaranteeing that friction layer and steel core harden, and central layer must copper facing.
The 3rd, the sintering of tratitional technology is to carry out in a special bell jar stove, and the cycle is long, and a stove product is about 10-15 hour.Efficient is low; The present invention adopts mesh-belt furnace continuous sintering vulcanizing press pressurized, heated to solidify 8-10 minute, and efficient can improve more than 20 times.
The 4th, the tratitional technology central layer will pass through 750-820 ℃ of sintering, and hardness intensity significantly reduces, and dimensional accuracy reduces; The present invention is because central layer without 750-820 ℃ of sintering, can overcome the above-mentioned shortcoming of tratitional technology.
Description of drawings
Fig. 1 is the structural representation of existing friction plate.
Fig. 2 is the friction plate pressure sintering schematic representation of prior art.
Fig. 3 is the structural representation of friction plate of the present invention.
Fig. 4 is that vulcanizing press friction plate of the present invention is pasted the curing schematic representation.
Embodiment
The present invention will be described in detail below in conjunction with accompanying drawing: shown in the accompanying drawing 3, Wet-type copper based powder metallurgy friction wafer of the present invention, it mainly is made up of friction layer 22 on the steel core plate 21 of centre and at least one side, described steel core plate 21 be combined with one deck adhesive film 23 on the one side at least, and on adhesive film 23, be compounded with one deck friction layer 22 again.Respectively be combined with one deck adhesive film 23 on the upper and lower surface of the steel core plate 21 shown in the accompanying drawing 1, and on adhesive film 23, be compounded with one deck friction layer 22 more separately; And the hole in friction layer 22 contains the modified alkyd resin glue that has solidified.
Wet-type copper based powder metallurgy friction wafer manufacturing process of the present invention is as follows: friction layer batching---→ batch mixing die mould---→ sintering---→ impregnation---→ oven dry---→ solidify---→ steel core plate degreasing and rust removal---→ gluing---→ airing---→ with friction layer closed assembly---→ curing---→ machining oil groove.Friction layer batching (weight percentage) same as the prior art:
Batch mixing mixed 30-60 minute in the drum-type batch mixer; Die mould is compression molding on press, and pressure is 100-300MPa.
Sintering carries out in the mesh belt type sintering furnace, and temperature 760-830 ℃, the time is 30-50 minute, logical 75%H2+25%N2 protection gas in the stove.Specifically see shown in the accompanying drawing 4: comprise the pressurization oil cylinder 24 in the press among the figure, be folded in middle friction plate 25 and add locating back 26 etc.
Impregnation carries out in the vacuum-latexed machine, and glue is YSM-1, with acetone diluted to 50% concentration, normal temperature impregnation 60 minutes.Be solidificated in the baking oven and carry out, 150-160 ℃, the time is 60 minutes.
The sand blast rust cleaning is carried out on steel core plate surface, cleans airing with ethyl acetate.The film thickness of gluing is 0,05-0.10mm.
With the friction plate that assembles on vulcanizing press 160 ℃, 0.5-1.2Mpa solidified 8-12 minute.
The batching of friction layer of the present invention, batch mixing, die mould technology is identical with tratitional technology, and sintering is different with tratitional technology, adopts pressureless sintering in continuous fritting furnace, and tratitional technology is in the pressure sintering of bell jar stove.Described sintering adopts pressureless sintering in continuous fritting furnace, and the friction layer behind the sintering is also dried behind the normal temperature impregnation in the vacuum-latexed groove and formed, and splices with the steel core plate then, before splicing, earlier to steel core plate surface coating; Make behind cure under pressure on the vulcanizing press splicing back.
Friction layer of the present invention normal temperature impregnation 50--70 minute in the vacuum-latexed groove, the best is 60 minutes; Glue is that YSM-1 arrives concentration 50% with acetone diluted, dries under 80-95 ℃ of temperature, and optimum temperature was solidified 50-70 minute at 150-160 ℃ at 90 ℃ again, and the best is 60 minutes.Described friction layer and gluing thickness were solidifying 8-12 minute under 160-180 ℃, 0.5-1.2Mpa pressure on the vulcanizing press in the superimposed back of the steel core plate assembly unit of 0.05-0.1mm.The steel core plate carries out surface treatment earlier before assembly unit: comprise that the surface carries out sand blast rust cleaning, clean airing, and coating glue film with ethyl acetate.The follow-up oil groove processing of friction plate of the present invention is identical with tratitional technology.
Claims (5)
1. Wet-type copper based powder metallurgy friction wafer, it mainly is made up of friction layer (22) on the steel core plate (21) of centre and at least one side, what it is characterized in that described steel core plate (21) is combined with one deck adhesive film (23) on the one side at least, and is compounded with one deck friction layer (22) again on adhesive film (23).
2. Wet-type copper based powder metallurgy friction wafer according to claim 1 is characterized in that respectively being combined with one deck adhesive film (23) on the upper and lower surface of described steel core plate (21), and be compounded with one deck friction layer (22) more separately on adhesive film (23); Hole in friction layer (22) contains the modified alkyd resin glue that has solidified.
3. the manufacture method of a Wet-type copper based powder metallurgy friction wafer as claimed in claim 1 or 2, this method comprises friction layer batching, batch mixing, die mould, sintering at least, processes with the assembly unit of steel core plate, oil groove, it is characterized in that described sintering adopts pressureless sintering in continuous fritting furnace, friction layer behind the sintering is also dried behind the normal temperature impregnation in the vacuum-latexed groove and is formed, splice with the steel core plate then, before splicing, earlier to steel core plate surface coating; Make behind cure under pressure on the vulcanizing press splicing back.
4. the manufacture method of Wet-type copper based powder metallurgy friction wafer according to claim 3, it is characterized in that described friction layer normal temperature impregnation 50--70 minute in the vacuum-latexed groove, glue is that YSM-1 arrives concentration 50% with acetone diluted, under 80-95 ℃ of temperature, dry, solidified 50-70 minute at 150-160 ℃ again.
5. according to the manufacture method of claim 2 or 3 described Wet-type copper based powder metallurgy friction wafers, it is characterized in that described friction layer and gluing thickness were solidifying 8-12 minute on the vulcanizing press in the superimposed back of the steel core plate assembly unit of 0.05-0.1mm under 160-180 ℃, 0.5-1.2Mpa pressure.
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| CN102230493A (en) * | 2011-06-09 | 2011-11-02 | 杭州发达齿轮箱集团有限公司 | Copper-based powder metallurgy thrust ring and preparation method thereof |
| CN102506107A (en) * | 2011-07-06 | 2012-06-20 | 中南大学 | Wet type friction clutch disc material for transmitting high power and preparation process |
| CN102089159B (en) * | 2008-07-17 | 2013-07-17 | 赫尔比格驱动技术有限公司 | Method for producing an organic and/or carbon-containing friction lining |
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| CN102089159B (en) * | 2008-07-17 | 2013-07-17 | 赫尔比格驱动技术有限公司 | Method for producing an organic and/or carbon-containing friction lining |
| CN102109021A (en) * | 2009-12-24 | 2011-06-29 | 贵州新安航空机械有限责任公司 | Copper-based powder metallurgy yawing brake block |
| CN101839295A (en) * | 2010-05-31 | 2010-09-22 | 山东金麒麟集团有限公司 | High speed train powder metallurgy brake pad and preparation technology thereof |
| CN102230493A (en) * | 2011-06-09 | 2011-11-02 | 杭州发达齿轮箱集团有限公司 | Copper-based powder metallurgy thrust ring and preparation method thereof |
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