CN110725153A - Paper-based friction material papermaking pulping preparation method - Google Patents
Paper-based friction material papermaking pulping preparation method Download PDFInfo
- Publication number
- CN110725153A CN110725153A CN201911117506.XA CN201911117506A CN110725153A CN 110725153 A CN110725153 A CN 110725153A CN 201911117506 A CN201911117506 A CN 201911117506A CN 110725153 A CN110725153 A CN 110725153A
- Authority
- CN
- China
- Prior art keywords
- paper
- friction
- parts
- pulping
- minutes
- 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
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
- D21F13/02—Making hand-made paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/46—Non-siliceous fibres, e.g. from metal oxides
- D21H13/50—Carbon fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a preparation method of paper-based friction material paper making beating, belonging to the technical field of paper-based friction material manufacturing process, which comprises the steps of mixing 25-30 parts of cotton pulp, 10-20 parts of wood pulp, 10-20 parts of graphite, 8-15 parts of carbon fiber, 8-10 parts of diatomite, 5-7 parts of feldspar powder, 8-10 parts of friction powder, 3-5 parts of mica, 2-5 parts of aramid fiber and 3-5 parts of latex, proportioning and beating with water, sequentially carrying out paper making, primary drying, blanking, gumming, secondary drying and paper piece curing on the paper pulp to prepare paper pieces, simultaneously sequentially carrying out processing treatment and gumming on steel plate raw materials to prepare a core plate, and finally carrying out heating, pressurizing, bonding and curing on the core plate and the paper pieces to finish the paper-based friction plate processing process. The friction material has the characteristics of low manufacturing cost, stable friction coefficient, low wear rate, high heat resistance, uniform and compact friction material and long service life of the product. The fiber shedding phenomenon is reduced, and the performance stability of the friction pair is improved.
Description
Technical Field
The invention relates to the technical field of manufacturing processes of paper-based friction materials, in particular to a preparation method of paper-based friction material pulping.
Background
The friction material is a key material for forming the friction pair, and the friction material is composed of three components regardless of a metal base, a semi-metal base or a non-metal base: a base component, a lubricating component and a friction component. The matrix forms a skeleton of the material, the strength of which is determined by it; the lubricating component plays a role in reducing self and dual abrasion; and the friction component plays a role in improving the friction coefficient. The three major components interact with each other and are indispensable.
Paper-based friction materials, which have appeared in the end of the 20 th century, 50 s, are among the most widely used wet friction materials in the world today. The paper-based friction material is made of cellulose fibers, high-performance fibers, special particles, additives and different adhesives, is a soft and porous material, has a uniform structure along the thickness direction, and pores are communicated with one another. When the friction pair is not engaged, the pores can store lubricating oil, and when the friction pair is engaged, the oil flows out from the porous material, thereby cooling the friction surface. The paper based material is resilient and can distribute the load evenly over the entire surface by elastic deformation when engaged. However, because of its organic structure, the thermal conductivity and heat capacity of the paper-based friction material are smaller than those of the copper-based friction material. Meanwhile, the paper-based friction material is compressed and permanently deformed due to excessive surface pressure, so that the surface temperature of the material is rapidly increased, the resin binder below the surface is broken, and spots or large-area falling of the material occurs, so that the material fails.
With the development of science and technology, people have higher and higher requirements on speed, load and safety of transportation vehicles and power machines. In addition to the increasingly prominent and intense market competition of the world energy and environmental protection problems, the vehicle transmission machinery market will present a multi-level and diversified state of optimal design in the future. The vehicle transmission develops towards comfortable operation, softness, low oil consumption, environmental protection and low noise, and most of the prior agricultural mechanical brake, clutch friction material and automobile transmission friction material in the market are laggard in technology, low in friction coefficient and high in noise.
The high-performance friction material applied to the working conditions of high speed and heavy load at present mainly comprises: powder metallurgy friction materials, carbon/carbon friction materials, ceramic based friction materials, semi-metallic friction materials, and paper based friction materials. The high cost of the deposited carbon/carbon friction material and the brittleness of the ceramic-based friction material restrict the large-scale application of the deposited carbon/carbon friction material, so that the friction material and the friction pair with ultra-stable friction coefficient, high dynamic impact strength, high heat resistance, low wear rate and low manufacturing cost become hot spots, key points and difficulties for the research of domestic and foreign research institutions and friction material enterprises.
The traditional technique for connecting the fiber weaving type friction material and the core plate obtains the connection strength by an adhesive. The bonding technology has the defects that the friction material can not bear the friction behavior at high temperature, and can still bear the friction material when being subjected to surface bonding temperature of more than 200 ℃ for a long time, but the adhesive serving as the adhesive for enhancing the bonding strength is decomposed due to high temperature, so that the shearing strength is reduced. The coupling strength of the friction material layer and the core plate is enhanced by the intermediate layer copper fibers, so that the friction material can work at a surface bonding temperature of more than 200 ℃ for a long time without reducing the shear strength.
Disclosure of Invention
The invention mainly solves the defects of smaller energy load and pressure load borne by a friction plate, uneven proportioning, unstable performance, unstable braking and poor heat fading in the prior art, and provides a paper-based friction material papermaking pulping preparation method which has the characteristics of lower manufacturing cost, stable friction coefficient, low wear rate, high heat resistance, uniform and compact friction material and long service life of a product. The fiber shedding phenomenon is reduced, the performance stability of the friction pair is improved, and the running safety and stability of the vehicle are improved.
The technical problem of the invention is mainly solved by the following technical scheme:
a paper-based friction material paper-making beating preparation method comprises the following operation steps:
the first step is as follows: papermaking ingredients are reserved, and the proportion of water to the ingredients is 100: and 4, mixing 25-30 parts of cotton pulp, 10-20 parts of wood pulp, 10-20 parts of graphite, 8-15 parts of carbon fiber, 8-10 parts of diatomite, 5-7 parts of feldspar powder, 8-10 parts of friction powder, 3-5 parts of mica, 2-5 parts of aramid fiber and 3-5 parts of latex, and weighing the raw materials according to the total amount of the pulp for later use.
The second step is that: pulping, wherein in the pulping preparation process, according to the weight of dry materials, the water adding amount is calculated according to 4.5% -5.5% of the pulp concentration, water is injected into a pulping groove according to the required water amount, the pulping machine is started, cotton pulp, wood pulp and aramid fiber are added firstly, the speed of the pulping machine is 2000 rpm, the feed speed of a paper knife in the pulping machine is gradually increased, the pulping time is about 20-25 minutes, after scattering, carbon fiber is added, the scattering time is 88-100 minutes, after scattering, reuse materials, graphite, diatomite, feldspar powder, friction powder and mica are sequentially added, the pulping time is about 50-60 minutes, a sulfur accelerator is added, the pulping is 20-22 minutes, latex is added, the pulping is 8-10 minutes, sulfur aluminum is added, the pulping time is about 8-10 minutes, the speed of the pulping machine is 2000 rpm until the whole groove pulp is finely ground for about 3.2-3.8 hours.
The third step: and (3) papermaking, performing papermaking operation after pulping preparation is completed, filling the finely-ground ingredients into a papermaking device, making paper by starting the papermaking device, adjusting the rotating speed, diluting the pulp to enable the pulp concentration to reach 2.5-3.0%, then discharging the pulp for papermaking, and adjusting the papermaking rotating speed and the pulp concentration in time to ensure that the paper meets the required thickness.
The fourth step: and (3) primary drying, namely putting the paper into a dryer to be dried into a semi-dry state, wherein the drying temperature is 80-90 ℃, and the drying time is 28-30 minutes and the water content is 28-32% in a continuous dryer.
The fifth step: and (4) blanking, namely, blanking the inner circle and the outer circle of the paper sheet by a punch and according to the drawing size of the wiping sheet product.
And a sixth step: dipping the paper sheets into a basket, separating the paper sheets by using a wire netting, sinking the basket into a dipping machine, covering and fastening the dipping machine, and opening a vacuum pump to vacuumize, wherein the vacuum is 0.08 Pa; pumping for about 15 minutes, then closing a vacuum pump, adding glue solution, dipping for 1.5-2 hours until the glue solution is soaked, opening a cover, taking out a basket, draining the glue solution for about 2 hours, wherein the glue solution in a glue dipping device is 30% of modified resin glue and 70% of absolute ethyl alcohol;
the seventh step: and (4) secondary drying, namely after the alcohol volatilizes for two minutes, drying in a dryer at the temperature of 175-180 ℃ until drying.
Eighth step: the paper sheets are solidified, the paper sheet layers are stacked in a staggered mode and placed in the drying oven, the temperature in the flood box is raised to 115-125 degrees, the heat preservation time is 18-20 minutes, after the heat preservation is finished, the temperature in the drying oven is raised to 140-150 degrees, the paper sheets are kept warm in the drying oven for 25-30 minutes, the door of the drying oven is opened to deflate once, then the temperature is raised to 165-180 degrees again, the heat preservation is carried out for 2-2.5 hours, and after the heat preservation is finished, the door of the drying oven is opened to be cooled and then the paper sheets are taken.
The ninth step: and (4) processing the core plate, wherein the material of the friction pair dual sheet is 65Mn, 45 steel and 30 CrMnSi. Taking a steel plate, firstly punching an inner circle and an outer circle by using a punch, then positioning by using an inner hole, adjusting the hot leveling temperature according to the thickness of a core plate, performing hot leveling at 650-680 ℃, and performing positive and negative stacking and heat preservation for 2-2.5 hours; and then carrying out heat treatment, wherein the hardening HRC is 45-50.
The tenth step: and gluing the core plate, gluing two surfaces of the steel core plate on a gluing machine, and airing for later use.
The eleventh step: heating and pressurizing for bonding, and putting the steel core plate coated with the glue and dried in the air and the cured fiber friction layer on a hot plate of a vulcanization press to form the friction plate.
The twelfth step: and (3) solidifying the friction plate, sintering and pressurizing the friction plate, then putting the friction plate into an oven, fastening the friction plate by using a clamp, keeping the temperature in the oven at 175-180 ℃, and keeping the temperature for 1.8-2 hours.
The thirteenth step: and finally chamfering, grinding a plane and opening an oil groove on the solidified friction plate according to a drawing.
Preferably, the recycling material can be recycled twice in the pulping preparation process, the allowable upper limit of the first recycling is 50%, and the allowable upper limit of the second recycling is 40%; and (5) observing the beating degree at any time, and finely adjusting the beating time of each section in time. And detecting that the beating degree is qualified in the interval range of 30Sr degrees to 35Sr degrees, and then transferring to the next procedure.
Preferably, the diameter of the paper making device is 350mm, the thickness of the paper sheet is required to be measured according to the requirements of the thickness of the friction layer of the massage wiping sheet, and the principle is that if the thickness of the paper sheet is 1mm, the thickness of the friction layer is 0.6mm, and the like; and placing a filter screen on the paper making device, and discharging water 4-6 cm higher than the screen.
Preferably, the sheet has an effect parameter of a material density of 1.0g/cm3(ii) a The porosity is 20%; the gel content is 35 percent; the static friction coefficient is 0.170; the coefficient of dynamic friction is 0.145; the wear rate is 1.5X 10-9cm2/J。
Preferably, the paper sheet is taken out of the paper making machine, subjected to primary drying, then dried in the sun until the paper sheet is completely dried, and dried in the sun for two days for standby storage.
Preferably, the heat-treated and quenched core plate is subjected to vibration to remove oxide skin, then is cleaned on a cleaning machine to remove surface oil stains, then is dried in the air, and then is scrubbed on two surfaces of the core plate by using acetone to keep clean.
Preferably, the temperature of the hot plate vulcanizer is 180 to 185 degrees, the pressure is 230 to 240kg per square centimeter, and the pressure holding time is 5 minutes per 1 mm.
The invention can achieve the following effects:
compared with the prior art, the paper-based friction material papermaking pulping preparation method provided by the invention has the characteristics of lower manufacturing cost, stable friction coefficient, low wear rate, high heat resistance, uniform and compact friction material and long service life of the product. The fiber shedding phenomenon is reduced, the performance stability of the friction pair is improved, and the running safety and stability of the vehicle are improved.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments.
Example (b): a paper-based friction material paper-making beating preparation method comprises the following operation steps:
the first step is as follows: papermaking ingredients are reserved, and the proportion of water to the ingredients is 100: and 4, mixing 25 parts of cotton pulp, 15 parts of wood pulp, 15 parts of graphite, 10 parts of carbon fiber, 9 parts of diatomite, 6 parts of feldspar powder, 9 parts of friction powder, 4 parts of mica, 3 parts of aramid fiber and 4 parts of latex, and respectively weighing the raw materials according to the total amount of the pulp for later use.
The second step is that: pulping, pulping preparation process, firstly calculating water adding amount according to 5% of pulp concentration according to dry material weight, injecting water into a pulping groove according to required water amount, starting a pulping machine, firstly adding cotton pulp, wood pulp and aramid fiber, wherein the speed of the pulping machine is 2000 r/min, the feed speed of a paper knife in the pulping machine is gradually increased, the pulping time is 25 minutes, after scattering, adding carbon fiber, the scattering time is 90 minutes, then scattering, sequentially adding reuse material, graphite, diatomite, feldspar powder, friction powder and mica, the pulping time is about 60 minutes, adding a sulfur accelerator, pulping for 20 minutes, adding latex, pulping for 10 minutes, adding sulfur aluminum, the pulping time is about 10 minutes, the speed of the pulping machine is 2000 r/min, and the whole groove pulp is thinned for about 3.5 hours.
In the pulping preparation process, the allowed recycled materials can be recycled twice, the allowed upper limit of the first recycling is 50%, and the allowed upper limit of the second recycling is 40%; and (5) observing the beating degree at any time, and finely adjusting the beating time of each section in time. And detecting that the beating degree is qualified in the interval range of 30Sr degrees to 35Sr degrees, and then transferring to the next procedure.
The third step: and (3) papermaking, performing papermaking operation after pulping preparation is completed, filling the finely-ground ingredients into a papermaking device, making paper by starting the papermaking device, adjusting the rotating speed, diluting the pulp to enable the pulp concentration to reach 2.5-3.0%, then discharging the pulp for papermaking, and adjusting the papermaking rotating speed and the pulp concentration in time to ensure that the paper meets the required thickness. The paper sheet has an effect parameter of a material density of 1.0g/cm3(ii) a The porosity is 20%; the gel content is 35 percent; the static friction coefficient is 0.170; the coefficient of dynamic friction is 0.145; wear rate 1.5 x 10-9cm2/J。
The diameter of the paper making device is 350mm, the thickness of the paper sheet is required to be measured according to the thickness requirement of the friction layer of the massage wiping sheet, and the principle is that if the thickness of the paper sheet is 1mm, the thickness of the friction layer is 0.6mm, and so on; the paper making device is provided with a filter screen, and the water is discharged about 5 cm higher than the screen.
The fourth step: and (3) primary drying, namely putting the paper into a dryer to be dried into semi-dry paper, wherein the drying temperature is 85 ℃, and the drying time is about 30 minutes and the water content is 30 percent. And taking the paper sheet out of the paper making device, drying for the first time, then drying the paper sheet in the sun until the paper sheet is completely dried, and storing the paper sheet for later use in the sun weather for two days.
The fifth step: and (4) blanking, namely, blanking the inner circle and the outer circle of the paper sheet by a punch and according to the drawing size of the wiping sheet product.
And a sixth step: dipping the paper sheets into a basket, separating the paper sheets by using a wire netting, sinking the basket into a dipping machine, covering and fastening the dipping machine, and opening a vacuum pump to vacuumize, wherein the vacuum is 0.08 Pa; pumping for about 15 minutes, then closing a vacuum pump, adding glue solution, dipping the glue solution in a glue dipping device for 1.5-2 hours until the glue solution is soaked by 30% of modified resin glue and 70% of absolute ethyl alcohol, opening a cover, taking out a basket, draining the glue solution for about 2 hours.
The seventh step: and (4) secondary drying, namely drying in a dryer after the alcohol is volatilized for two minutes, wherein the drying temperature is 175 ℃ until drying.
Eighth step: and (3) curing the paper sheets, stacking the paper sheet layers in a staggered manner, putting the paper sheets into an oven, heating the temperature in the flood box to 120 ℃, keeping the temperature for 20 minutes, heating the temperature in the oven to 145 ℃ after the heat preservation is finished, keeping the temperature of the paper sheets in the oven for 30 minutes, opening the door of the oven to deflate once, heating the paper sheets to 170 ℃, keeping the temperature for 2 hours again, and opening the door of the oven to cool and take out the paper sheets after the heat preservation is finished.
The ninth step: and (4) processing the core plate, wherein the material of the friction pair dual sheet is 65Mn, 45 steel and 30 CrMnSi. Taking a steel plate, firstly punching an inner circle and an outer circle by using a punch, then positioning by using an inner hole, adjusting the hot leveling temperature according to the thickness of a core plate, performing hot leveling at 650 ℃, and stacking the core plate in a positive-negative mode for heat preservation for 2.5 hours; then, heat treatment is carried out, and the hardening HRC is 48.
And removing oxide skin of the heat-treated and quenched core plate by vibration, cleaning the core plate on a cleaning machine to remove surface oil stains, drying the core plate in the air, and scrubbing two surfaces of the core plate by using acetone to keep the core plate clean.
The tenth step: and gluing the core plate, gluing two surfaces of the steel core plate on a gluing machine, and airing for later use.
The eleventh step: heating and pressurizing for bonding, and putting the steel core plate coated with the glue and dried in the air and the cured fiber friction layer on a hot plate of a vulcanization press to form the friction plate. When heating and pressurizing for bonding, the temperature of a hot plate vulcanizing machine is 180 ℃, the pressure is 230kg per square centimeter, and the pressure maintaining time is 5 minutes per 1 mm.
The twelfth step: and (3) solidifying the friction plate, sintering and pressurizing the friction plate, and then putting the friction plate into an oven, fastening the friction plate by using a clamp, wherein the temperature in the oven is 175 ℃, and the heat preservation time is 2 hours.
The thirteenth step: and finally chamfering, grinding a plane and opening an oil groove on the solidified friction plate according to a drawing.
The performance test was performed according to the ingredients of different papermaking furnishes, and the ingredients and performance results of the test papermaking furnishes are shown in tables one to five:
1. selecting the components shown in the table one for testing:
table one: test formulations
2. QM1000 Friction Performance test
2.1 test parameters
The 5 groups of samples were subjected to the frictional wear test according to the parameters of table one.
Table two: test parameters
2.2 test results
The dynamic and static friction coefficients and the wear rate are respectively shown in the table III, the table IV and the table V
Table three: coefficient of dynamic friction
Table four: coefficient of static friction
| Sample number | 1 | 2 | 3 | 4 | 5 |
| Coefficient of static friction | 0.165 | 0.170 | 0.159 | 0.175 | 0.178 |
Table five: rate of wear
The heat resistance measurement results of this example:
table six: heat resistance measurement result (inertia 0.1Kgf. mm)2)
In conclusion, the preparation method of paper-based friction material papermaking beating has the characteristics of lower manufacturing cost, stable friction coefficient, low wear rate, high heat resistance, uniform and compact friction material and long service life of products. The fiber shedding phenomenon is reduced, the performance stability of the friction pair is improved, and the running safety and stability of the vehicle are improved.
The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.
Claims (7)
1. A preparation method of paper-based friction material pulping is characterized by comprising the following operation steps:
the first step is as follows: papermaking ingredients for later use, wherein the ratio of water to the ingredients is 100: 4, the ingredients are formed by mixing 25-30 parts of cotton pulp, 10-20 parts of wood pulp, 10-20 parts of graphite, 8-15 parts of carbon fiber, 8-10 parts of diatomite, 5-7 parts of feldspar powder, 8-10 parts of friction powder, 3-5 parts of mica, 2-5 parts of aramid fiber and 3-5 parts of latex, and the raw materials are respectively weighed for later use according to the total amount of the pulp;
the second step is that: pulping, wherein in the pulping preparation process, according to the weight of dry materials, the water adding amount is calculated according to 4.5% -5.5% of the pulp concentration, water is injected into a pulping groove according to the required water amount, the pulping machine is started, cotton pulp, wood pulp and aramid fiber are added firstly, the speed of the pulping machine is 2000 r/m, the feed speed of a paper knife in the pulping machine is gradually increased, the pulping time is about 20-25 minutes, after scattering, carbon fiber is added, the scattering time is 88-100 minutes, after scattering, reuse materials, graphite, diatomite, feldspar powder, friction powder and mica are sequentially added, the pulping time is about 50-60 minutes, a sulfur accelerator is added, the pulping time is 20-22 minutes, latex is added, the pulping time is 8-10 minutes, sulfur aluminum is added, the pulping time is about 8-10 minutes, the speed of the pulping machine is 2000 r/m, and the whole groove pulp is finely ground for about 3.2-3.8 hours;
the third step: papermaking, namely performing papermaking operation after pulping preparation, filling the finely-ground ingredients into a papermaking device, starting the papermaking device to make paper, adjusting the rotating speed, diluting the pulp to enable the pulp concentration to reach 2.5-3.0%, then discharging the pulp to make paper, and adjusting the papermaking rotating speed and the pulp concentration in time to ensure that the paper meets the required thickness;
the fourth step: primary drying, namely putting the paper into a dryer to be dried into a semi-dry state, wherein the drying temperature is 80-90 ℃, and the drying time is about 28-30 minutes and the water content is 28-32% in a continuous dryer;
the fifth step: blanking, namely, blanking the inner circle and the outer circle of the paper sheet by a punch and according to the drawing size of the wiping sheet product;
and a sixth step: dipping the paper sheets into a basket, separating the paper sheets by using a wire netting, sinking the basket into a dipping machine, covering and fastening the dipping machine, and opening a vacuum pump to vacuumize, wherein the vacuum is 0.08 Pa; pumping for about 15 minutes, then closing a vacuum pump, adding glue solution, dipping for 1.5-2 hours until the glue solution is soaked, opening a cover, taking out a basket, draining the glue solution for about 2 hours, wherein the glue solution in a glue dipping device is 30% of modified resin glue and 70% of absolute ethyl alcohol;
the seventh step: secondary drying, namely after the alcohol volatilizes for two minutes, drying in a dryer at the temperature of 175-180 ℃ until drying;
eighth step: curing the paper sheets, stacking the paper sheet layers in a staggered manner, placing the paper sheets into an oven, heating the paper sheets in the oven to 115-125 ℃, keeping the temperature for 18-20 minutes, heating the temperature in the oven to 140-150 ℃ after heat preservation is finished, keeping the temperature of the paper sheets in the oven for 25-30 minutes, opening the oven door to deflate once, heating the paper sheets to 165-180 ℃, keeping the temperature for 2-2.5 hours, opening the oven door after heat preservation is finished, and taking out the paper sheets after cooling;
the ninth step: processing a core plate, wherein a material of a friction pair dual sheet is 65Mn, 45 steel and 30 CrMnSi; taking a steel plate, firstly punching an inner circle and an outer circle by using a punch, then positioning by using an inner hole, adjusting the hot leveling temperature according to the thickness of a core plate, performing hot leveling at 650-680 ℃, and performing positive and negative stacking and heat preservation for 2-2.5 hours; then carrying out heat treatment, wherein the hardening HRC is 45-50;
the tenth step: gluing the core plate, gluing two surfaces of the steel core plate on a gluing machine, and airing for later use;
the eleventh step: heating and pressurizing for bonding, and putting the steel core plate coated with the glue and dried in the air and the cured fiber friction layer on a hot plate of a vulcanization press to form a friction plate;
the twelfth step: solidifying the friction plate, sintering and pressurizing the friction plate, then putting the friction plate into an oven, fastening the friction plate by using a clamp, keeping the temperature in the oven at 175-180 ℃, and keeping the temperature for 1.8-2 hours;
the thirteenth step: and finally chamfering, grinding a plane and opening an oil groove on the solidified friction plate according to a drawing.
2. The paper-based friction material paper-making beating preparation method according to claim 1, characterized in that: in the pulping preparation process, the allowed recycled materials can be recycled twice, the allowed upper limit of the first recycling is 50%, and the allowed upper limit of the second recycling is 40%; observing the beating degree at any time, and finely adjusting the beating time of each section in time; and detecting that the beating degree is qualified in the interval range of 30Sr degrees to 35Sr degrees, and then transferring to the next procedure.
3. The paper-based friction material paper-making beating preparation method according to claim 1, characterized in that: the diameter of the paper making device is 350mm, the thickness of the paper sheet is required to be measured according to the thickness requirement of the friction layer of the massage wiping sheet, and the principle is that if the thickness of the paper sheet is 1mm, the thickness of the friction layer is 0.6mm, and so on; and placing a filter screen on the paper making device, and discharging water 4-6 cm higher than the screen.
4. The paper-based friction material paper-making beating preparation method according to claim 3, characterized in that: the paper sheet has an effect parameter of a material density of 1.0g/cm3(ii) a The porosity is 20%; the gel content is 35 percent; the static friction coefficient is 0.170; the coefficient of dynamic friction is 0.145; wear rate 1.5 x 10-9cm2/J。
5. The paper-based friction material paper-making beating preparation method according to claim 3, characterized in that: and taking the paper sheet out of the paper making device, drying for the first time, then drying the paper sheet in the sun until the paper sheet is completely dried, and storing the paper sheet for later use in the sun weather for two days.
6. The paper-based friction material paper-making beating preparation method according to claim 1, characterized in that: and removing oxide skin of the heat-treated and quenched core plate by vibration, cleaning the core plate on a cleaning machine to remove surface oil stains, drying the core plate in the air, and scrubbing two surfaces of the core plate by using acetone to keep the core plate clean.
7. The paper-based friction material paper-making beating preparation method according to claim 1, characterized in that: when heating and pressurizing for bonding, the temperature of the hot plate vulcanizing machine is 180-185 ℃, the pressure is 230-240 kg per square centimeter, and the pressure maintaining time is 5 minutes per 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117506.XA CN110725153A (en) | 2019-11-15 | 2019-11-15 | Paper-based friction material papermaking pulping preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117506.XA CN110725153A (en) | 2019-11-15 | 2019-11-15 | Paper-based friction material papermaking pulping preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110725153A true CN110725153A (en) | 2020-01-24 |
Family
ID=69224331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911117506.XA Pending CN110725153A (en) | 2019-11-15 | 2019-11-15 | Paper-based friction material papermaking pulping preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110725153A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1552307A (en) * | 1967-03-30 | 1969-01-03 | ||
| US3827934A (en) * | 1971-06-28 | 1974-08-06 | Westvaco Corp | Process for producing high strength,high yield hardwood pulp |
| CN1446875A (en) * | 2003-01-28 | 2003-10-08 | 西北工业大学 | Paper based friction material with carbon fibers enhanced and its preparation method |
| CN102221059B (en) * | 2011-06-07 | 2012-11-28 | 杭州萧山红旗摩擦材料有限公司 | Wet brake friction plate and manufacturing method thereof |
| CN102942898A (en) * | 2012-09-21 | 2013-02-27 | 杭州萧山红旗摩擦材料有限公司 | Paper base friction material and preparation method thereof |
| CN103541266A (en) * | 2013-10-12 | 2014-01-29 | 陕西科技大学 | Pumping filtration-based preparation method of paper-based friction material |
| CN107245898A (en) * | 2017-07-11 | 2017-10-13 | 江南大学 | A kind of carbon fiber reinforced polyether-ether-ketone paper friction material and preparation method thereof |
-
2019
- 2019-11-15 CN CN201911117506.XA patent/CN110725153A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1552307A (en) * | 1967-03-30 | 1969-01-03 | ||
| US3827934A (en) * | 1971-06-28 | 1974-08-06 | Westvaco Corp | Process for producing high strength,high yield hardwood pulp |
| CN1446875A (en) * | 2003-01-28 | 2003-10-08 | 西北工业大学 | Paper based friction material with carbon fibers enhanced and its preparation method |
| CN102221059B (en) * | 2011-06-07 | 2012-11-28 | 杭州萧山红旗摩擦材料有限公司 | Wet brake friction plate and manufacturing method thereof |
| CN102942898A (en) * | 2012-09-21 | 2013-02-27 | 杭州萧山红旗摩擦材料有限公司 | Paper base friction material and preparation method thereof |
| CN103541266A (en) * | 2013-10-12 | 2014-01-29 | 陕西科技大学 | Pumping filtration-based preparation method of paper-based friction material |
| CN107245898A (en) * | 2017-07-11 | 2017-10-13 | 江南大学 | A kind of carbon fiber reinforced polyether-ether-ketone paper friction material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8221660B2 (en) | Type of surface-reinforced solid wood section material and its manufacturing method | |
| CN106863512B (en) | The preparation method of outdoor timber recombinant material | |
| CN101058210A (en) | Regenerating fabric fiber plywood and its manufacturing method | |
| CN107191518B (en) | A kind of composite fibre high-quality friction material and preparation method thereof | |
| CN111590477B (en) | Raw material for processing non-woven fabric polishing wheel and manufacturing method of non-woven fabric polishing wheel | |
| CN104072183B (en) | A kind of method of fibre reinforced stratiform woodceramics | |
| CN101157241A (en) | A method for preparing straw particle board | |
| CN104989065B (en) | A kind of wood-plastic composite floor and preparation method thereof | |
| CN101053967A (en) | Wood simulation wood grain surface harden processing method | |
| CN109665855A (en) | A kind of preparation method of carbon/carbon-to-nitrogen boron Antifriction Composites | |
| CN113651627A (en) | Preparation method and application of alumina fiber reinforced alumina ceramic matrix composite | |
| CN110725153A (en) | Paper-based friction material papermaking pulping preparation method | |
| US20200291663A1 (en) | Bamboo strip substrate board and preparation method thereof, bamboo strip floor and application thereof | |
| CN105196651B (en) | A kind of multidimensional fiber-like high-quality friction material and preparation method thereof | |
| CN103692534A (en) | Gluing method for sliced bamboo man-made bamboo tea set | |
| CN107709853A (en) | The manufacture method of slide unit and slide unit | |
| CN108822798A (en) | Based on the controllable composite friction material and preparation method thereof of carbon constituent element scale dimension | |
| CN106625981A (en) | Poplar recombined wood used for structural materials and preparation method of poplar recombined wood | |
| CN115319877A (en) | Wood surface densification treatment method | |
| CN111618962A (en) | Method for modifying solid wood geothermal floor blank plate | |
| CN104589425B (en) | A kind of bathroom special-purpose water-proof bamboo-wood plyboard and its manufacture method | |
| CN107283550A (en) | The bamboo and wood recombinant material composite plate and its processing technology of a kind of utilization waste material | |
| CN105397897A (en) | Production method for antiflaming wood manmade carbonized wood | |
| CN206653489U (en) | Structure poplar wood base Scrimber | |
| CN111231434A (en) | High-performance composite friction material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200124 |
|
| RJ01 | Rejection of invention patent application after publication |