CN106505397B - A kind of preparation method of passenger car start and stop carbon brush used for electric engine - Google Patents
A kind of preparation method of passenger car start and stop carbon brush used for electric engine Download PDFInfo
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- CN106505397B CN106505397B CN201510564440.4A CN201510564440A CN106505397B CN 106505397 B CN106505397 B CN 106505397B CN 201510564440 A CN201510564440 A CN 201510564440A CN 106505397 B CN106505397 B CN 106505397B
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Abstract
The present invention provides a kind of preparation methods of passenger car start and stop carbon brush used for electric engine, including graphite, phenolic resin, tungsten disulfide, petroleum coke and acetone are uniformly mixed, and colloid powder is made；The colloid powder, copper powder and molybdenum disulfide are uniformly mixed, high copper feed powder is made；The colloid powder, copper powder and molybdenum disulfide are uniformly mixed, low copper containing amount feed powder is made；The high copper feed powder is put into the mold, the low copper containing amount feed powder is put on the high copper feed powder in the mold again, then copper soft whipping wire is inserted within the high copper feed powder via the low copper containing amount feed powder in the mold, compression process is carried out to it, carbon brush green compact is made；The carbon brush green compact is sintered, carbon brush first product is made；Grinding processing is carried out to the brush first product, obtains carbon brush finished product.The present invention by by the high copper bed of material and the low copper containing amount bed of material it is compound after compacting so that preparation passenger car start and stop carbon brush used for electric engine service life greatly improve.
Description
Technical field
The present invention relates to a kind of preparation methods of passenger car start and stop carbon brush used for electric engine, belong to electrical carbon field.
Background technique
Passenger car is to be mainly used for carrying passenger and its personal luggage or temporary items in its design and technical characteristic
Automobile covers car, microbus and the light bus no more than nine.With people 's material life level raising and
For automobile in the universal of modern society, people are also higher and higher to the various requirement of passenger car.Have in automotive interior various
Motor facilitates operation of the user to each system of car.
When passenger car start stop system is temporary parking (such as equal red lights) in vehicle travel process, auto extinguishing,
When needing to move on, it is restarted automatically the set of system of engine.When restarting engine, starter (start and stop electricity is needed
Machine) it reworks.Due to needing often such frequent starting, for start and stop carbon brush used for electric engine, loss is very big, makes to it
It is needed with the requirement in service life longer than conventional carbon brush for electric machine.The service life of conventional motor carbon brush is 3.5 ten thousand times, start and stop motor
It is 250,000 times or more with the service life of carbon brush.Start and stop carbon brush used for electric engine of the invention, based on start and stop carbon brush for electric machine to using the longevity
The requirement of life is made every effort to increase its wearability, increases service life.Carbon brush body is Gao Hantong using two kinds of component compactings, one kind
Measure the bed of material, one kind be the low copper containing amount bed of material, two layers it is compound after achieve the purpose that increase lubrication, reduce friction, improve service life.
Summary of the invention
The present invention is in order to overcome the shortcomings of to provide a kind of passenger car start and stop in existing passenger car start and stop carbon brush used for electric engine technology
The preparation method of carbon brush used for electric engine, the present invention by by the high copper bed of material and the low copper containing amount bed of material it is compound after compacting so that system
Standby carbon brush service life greatly improves.
The present invention provides a kind of preparation methods of passenger car start and stop carbon brush used for electric engine, comprising:
Graphite, phenolic resin, tungsten disulfide, petroleum coke and acetone are uniformly mixed, colloid powder is made；
The colloid powder, copper powder and molybdenum disulfide are uniformly mixed, high copper feed powder is made；
The colloid powder, copper powder and molybdenum disulfide are uniformly mixed, low copper containing amount feed powder is made；
The high copper feed powder and low copper containing amount feed powder are added separately in compacting tool set, it is carried out at compacting
Carbon brush green compact is made in reason；
The carbon brush green compact is sintered, carbon brush first product is made；
Grinding processing is carried out to the brush first product, obtains carbon brush finished product；
Wherein, the high copper feed powder and low copper containing amount feed powder are added separately in compacting tool set include:
First the high copper feed powder is put into the mold；
The low copper containing amount feed powder is put on the high copper feed powder in the mold again；
Then, copper soft whipping wire is inserted within the high copper feed powder via the low copper containing amount feed powder in the mold.
Wherein, described to be uniformly mixed graphite, phenolic resin, tungsten disulfide, petroleum coke and acetone, colloid powder packet is made
It includes:
Graphite, phenolic resin, tungsten disulfide and petroleum coke are uniformly mixed, colloid powder initial material is made；
Acetone is added in the colloid powder initial material and is uniformly mixed, colloid powder mixture is made；
The colloid powder mixture is dried, be crushed and sieving processing, the colloid powder is made.
In particular, the graphite, phenolic resin, tungsten disulfide, petroleum coke and acetone weight be 74-78:15-
20:2-5:1-5:25-35, the sum of the graphite, parts by weight of phenolic resin, tungsten disulfide and petroleum coke are 100 parts.
Especially, the graphite is hexagonal crystal system, and shape is in layer structure, has good high temperature resistant, conduction like fish scale
And lubricating action.Heretofore described graphite is black natural graphite powder, and suitable stone is added in carbon brush in carbon content >=99%
The wearability of product can be improved in ink.
In particular, in the graphite granularity≤44.5 μm graphite powder accounting < 15%, granularity is 75-150 μm of graphite
Powder accounting 40-80%.
Especially, the phenolic resin be yellow powder, be thermosetting phenolic resin, 75 μm of granularity <；Phenolic resin warp
It is carbonized after high-temperature process, the mechanical strength of product can be improved.
In particular, the tungsten disulfide be black powder, content >=99%, 30 μm of granularity <；The friction system of tungsten disulfide
Number is low, and the wearability of product can be improved.
Especially, the petroleum coke be black powder, carbon content >=99%, 150 μm of granularity <；Petroleum coke is done in carbon brush
As grinding agent, it may assist in commutator face and form uniform protective film, improve the wearability of product.
In particular, the acetone is colourless transparent liquid, solvent use is mainly done.
Especially, time graphite, phenolic resin, tungsten disulfide and petroleum coke being uniformly mixed is 10-20min.
In particular, it is 60 ± 10min that acetone is added to the time being uniformly mixed in the colloid powder initial material.
Especially, the temperature for carrying out drying and processing to the colloid powder mixture is 50-55 DEG C, time 10-12hh.
In particular, carrying out break process, colloid Powder Particle Size composition obtained to the colloid powder after drying are as follows:
45 μm of < of granularity accounting: < 15%；100 μm -- 300 μm of granularity accounting: 60--80%；The granularity that 420 μm of >
Accounting: < 5%.
Wherein, the weight of colloid powder, copper powder and molybdenum disulfide is 42-47:51- in the high copper feed powder
53:2-5。
In particular, the copper content of the copper powder is >=99.5%, granularity is 44.5 μm of <, and pine dress is than being 0.5-1.0g/
cm3。
Especially, the molybdenum disulfide is grey powder, 44.5 μm of content > 98.5%, granularity <；Molybdenum disulfide rubs
It is low to wipe coefficient, the wearability of product can be improved.
In particular, the colloid powder, copper powder and molybdenum disulfide are uniformly mixed, the time that high copper feed powder is made is
40-60min。
Wherein, the weight of colloid powder, copper powder and molybdenum disulfide is 71-75:20- in the low copper containing amount feed powder
28:1-5。
In particular, the copper content of the copper powder is >=99.5%, granularity is 44.5 μm of <, and pine dress is than being 0.5-1.0g/
cm3。
Especially, the molybdenum disulfide is grey powder, 44.5 μm of content > 98.5%, granularity <；Molybdenum disulfide rubs
It is low to wipe coefficient, the wearability of product can be improved.
In particular, the colloid powder, copper powder and molybdenum disulfide are uniformly mixed, the time that low copper containing amount feed powder is made is
30-40min。
Especially, the high copper feed powder layer is the 60-70% of total mixture thickness；The low copper containing amount feed powder layer is
The 30-40% of total mixture thickness；The plug wire depth of the copper soft whipping wire is the 1/2-2/3 of total thickness of feed layer in the mold.
Wherein, compression process is carried out to the mixture in the mold, carbon brush green compact is made.
In particular, the 3-4 tons/cm of unit pressure of the compression process2。
Wherein, the carbon brush green compact is sintered, carbon brush first product is made.
In particular, the treatment temperature of the sintering processes is 500-800 DEG C, the processing time is 8.5-15h.
Especially, the sintering processes are to be sintered the carbon brush green compact under nitrogen and hydrogen shield, institute
The ratio for stating nitrogen and hydrogen is 75%:25%.
Wherein, carbon brush finished product working process is carried out to the carbon brush first product, obtains carbon brush finished product.
Advantages of the present invention and advantageous effects are as follows:
1, the preparation method of passenger car start and stop carbon brush used for electric engine of the present invention uses two-layer compound pressing structure, and two layers contains
Amount of copper is different, and low copper containing layer coefficient of friction is low, and greasy property is good, and wearability is good, and the service life of carbon brush, Gao Hantong can be improved
Layer resistivity is low, conducts electricity very well, and improves the high conductivity of carbon brush, the excellent passenger car start and stop motor of two layers of compound processability
Use carbon brush.
2, suitable petroleum coke is added when preparing colloid powder in passenger car start and stop carbon brush used for electric engine of the present invention, is conducive in electricity
The surface of machine commutator forms uniform lubricating film, and by the self-lubricating function of lubricating film, the service life of carbon brush can be improved.
3, the passenger car start and stop carbon brush used for electric engine function admirable of the method for the present invention preparation, bulk density 3.15-3.30g/
cm3, resistivity is 0.40-0.60 μ Ω .m, Rockwell hardness (HR10/392) 85-110, and service life is up to 25-28 ten thousand times, carbon
Brushing is broken small, and power decline is no more than 10%.
Specific embodiment
Invention is illustrated with reference to embodiments.The advantages and features of the present invention will be with description and it is more clear
Chu.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art should
Understand, without departing from the spirit and scope of the invention can details to technical solution of the present invention and form modify
Or replacement, but these modifications and replacement are fallen within the protection scope of the present invention.
Embodiment 1
1, colloid powder is prepared
It is graphite powder 78 according to weight, phenol-formaldehyde resin powder 15, tungsten disulfide 2, petroleum coke 5, acetone 35 is ready to
Then graphite, phenolic resin, tungsten disulfide and petroleum coke are mixed 10min by raw material at normal temperature, obtain colloid powder initial material；So
Acetone is added in colloid powder initial material afterwards and mixes 70min, is uniformly mixed, colloid powder mixture is made；Finally colloid powder is mixed
Expect 50-55 DEG C at a temperature of drying 12h after, through break process, colloid powder is made.
2, high copper feed powder is prepared
It is colloid powder 42 according to weight, copper powder 53, molybdenum disulfide 5 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and high copper feed powder is made.
3, low copper containing amount feed powder is prepared
It is colloid powder 71 according to weight, copper powder 28, molybdenum disulfide 1 gets out raw material, then by colloid powder, copper powder
30min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and low copper containing amount feed powder is made.
4, compression process
First high copper feed powder is put into the mold；High copper material low copper containing amount feed powder being put into again in mold
On powder；Then, within by copper soft whipping wire via the low copper containing amount feed powder insertion high copper feed powder in mold；Wherein, Gao Han
Amount of copper feed powder layer is the 70% of total mixture thickness；Low copper containing amount feed powder layer is the 30% of total mixture thickness；Copper soft whipping wire
Plug wire depth is 2/3 of total thickness of feed layer in the mold.Compression process is carried out to the mixture in mold using press device,
Carbon brush green compact is made, wherein the 3 tons/cm of unit pressure of compression process2。
5, sintering and finished product working process
The carbon brush green compact suppressed is placed with high temperature sintering furnace, is sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:25%；Sintering process conditions are as follows: by temperature rise in high temperature sintering furnace in 15h
To 800 DEG C, up to carbon brush first product after being cooled to room temperature；Finished product working process is carried out to carbon brush first product, carbon brush finished product is made.
Physical performance index detection is carried out to carbon brush finished product, testing result is shown in Table 1.
Performance test is carried out to carbon brush finished product according to following test conditions and test method, detection carbon brush finished product uses the longevity
Life and wear rate, test result are shown in Table 2.
Operating voltage: 12V；The method of operation: work 1.5s, rest 28.5s；Experimental condition: air-cooled, motor surface temperature is not
More than 50 DEG C.
Embodiment 2
1, colloid powder is prepared
It is graphite powder 76 according to weight, phenol-formaldehyde resin powder 18, tungsten disulfide 3, petroleum coke 3, acetone 30 is ready to
Then graphite, phenolic resin, tungsten disulfide and petroleum coke are mixed 15min by raw material at normal temperature, obtain colloid powder initial material；So
Acetone is added in colloid powder initial material afterwards and mixes 60min, is uniformly mixed, colloid powder mixture is made；Finally colloid powder is mixed
Expect 50-55 DEG C at a temperature of drying 11h after, through break process, colloid powder is made.
2, high copper feed powder is prepared
It is colloid powder 45 according to weight, copper powder 52, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
50min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and high copper feed powder is made.
3, low copper containing amount feed powder is prepared
It is colloid powder 73 according to weight, copper powder 25, molybdenum disulfide 2 gets out raw material, then by colloid powder, copper powder
35min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and low copper containing amount feed powder is made.
4, compression process
First high copper feed powder is put into the mold；High copper material low copper containing amount feed powder being put into again in mold
On powder；Then, within by copper soft whipping wire via the low copper containing amount feed powder insertion high copper feed powder in mold；Wherein, Gao Han
Amount of copper feed powder layer is the 65% of total mixture thickness；Low copper containing amount feed powder layer is the 35% of total mixture thickness；Copper soft whipping wire
Plug wire depth is 3/5 of total thickness of feed layer in the mold.Compression process is carried out to the mixture in mold using press device,
Carbon brush green compact is made, wherein the 3.5 tons/cm of unit pressure of compression process2。
5, sintering and finished product working process
The carbon brush green compact suppressed is placed with high temperature sintering furnace, is sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:25%；Sintering process conditions are as follows: by temperature rise in high temperature sintering furnace in 12h
To 700 DEG C, up to carbon brush first product after being cooled to room temperature；Finished product working process is carried out to carbon brush first product, carbon brush finished product is made.
Physical performance index detection is carried out to carbon brush finished product, testing result is shown in Table 1.
Performance test is carried out to carbon brush finished product according to following test conditions and test method, detection carbon brush finished product uses the longevity
Life and wear rate, test result are shown in Table 2.
Operating voltage: 12V；The method of operation: work 1.5s, rest 28.5s；Experimental condition: air-cooled, motor surface temperature is not
More than 50 DEG C.
Embodiment 3
1, colloid powder is prepared
It is graphite powder 74 according to weight, phenol-formaldehyde resin powder 20, tungsten disulfide 5, petroleum coke 1, acetone 25 is ready to
Then graphite, phenolic resin, tungsten disulfide and petroleum coke are mixed 20min by raw material at normal temperature, obtain colloid powder initial material；So
Acetone is added in colloid powder initial material afterwards and mixes 50min, is uniformly mixed, colloid powder mixture is made；Finally colloid powder is mixed
Expect 50-55 DEG C at a temperature of drying 10h after, through break process, colloid powder is made.
2, high copper feed powder is prepared
It is colloid powder 47 according to weight, copper powder 51, molybdenum disulfide 2 gets out raw material, then by colloid powder, copper powder
40min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and high copper feed powder is made.
3, low copper containing amount feed powder is prepared
It is colloid powder 75 according to weight, copper powder 20, molybdenum disulfide 5 gets out raw material, then by colloid powder, copper powder
40min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and low copper containing amount feed powder is made.
4, compression process
First high copper feed powder is put into the mold；High copper material low copper containing amount feed powder being put into again in mold
On powder；Then, within by copper soft whipping wire via the low copper containing amount feed powder insertion high copper feed powder in mold；Wherein, Gao Han
Amount of copper feed powder layer is the 60% of total mixture thickness；Low copper containing amount feed powder layer is the 40% of total mixture thickness；Copper soft whipping wire
Plug wire depth is 1/2 of total thickness of feed layer in the mold.Compression process is carried out to the mixture in mold using press device,
Carbon brush green compact is made, wherein the 4 tons/cm of unit pressure of compression process2。
5, sintering and finished product working process
The carbon brush green compact suppressed is placed with high temperature sintering furnace, is sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:25%；Sintering process conditions are as follows: by temperature rise in high temperature sintering furnace in 8.5h
To 500 DEG C, up to carbon brush first product after being cooled to room temperature；Finished product working process is carried out to carbon brush first product, carbon brush finished product is made.
Physical performance index detection is carried out to carbon brush finished product, testing result is shown in Table 1.
Performance test is carried out to carbon brush finished product according to following test conditions and test method, detection carbon brush finished product uses the longevity
Life and wear rate, test result are shown in Table 2.
Operating voltage: 12V；The method of operation: work 1.5s, rest 28.5s；Experimental condition: air-cooled, motor surface temperature is not
More than 50 DEG C.
Reference examples 1
1, colloid powder is prepared
It is graphite powder 80 according to weight, phenol-formaldehyde resin powder 20, acetone 30 gets out raw material, then by graphite, phenol
Urea formaldehyde mixes 40min at normal temperature, obtains colloid powder initial material；Then acetone is added in colloid powder initial material and mixes 30min, mixed
It closes uniformly, colloid powder mixture is made；Finally by colloid powder mixture 50-55 DEG C at a temperature of drying 12h after, through broken place
Colloid powder is made in reason.
2, high copper feed powder is prepared
It is colloid powder 45 according to weight, copper powder 52, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and high copper feed powder is made.
3, low copper containing amount feed powder is prepared
It is colloid powder 72 according to weight, copper powder 25, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and low copper containing amount feed powder is made.
4, compression process
First high copper feed powder is put into the mold；High copper material low copper containing amount feed powder being put into again in mold
On powder；Then, within by copper soft whipping wire via the low copper containing amount feed powder insertion high copper feed powder in mold；Wherein, Gao Han
Amount of copper feed powder layer is the 65% of total mixture thickness；Low copper containing amount feed powder layer is the 35% of total mixture thickness；Copper soft whipping wire
Plug wire depth is 3/5 of total thickness of feed layer in the mold.Compression process is carried out to the mixture in mold using press device,
Carbon brush green compact is made, wherein the 3.5 tons/cm of unit pressure of compression process2。
5, sintering and finished product working process
The carbon brush green compact suppressed is placed with high temperature sintering furnace, is sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:25%；Sintering process conditions are as follows: by temperature rise in high temperature sintering furnace in 12h
To 700 DEG C, up to carbon brush first product after being cooled to room temperature；Finished product working process is carried out to carbon brush first product, carbon brush finished product is made.
Physical performance index detection is carried out to carbon brush finished product, testing result is shown in Table 1.
Performance test is carried out to carbon brush finished product according to following test conditions and test method, detection carbon brush finished product uses the longevity
Life and wear rate, test result are shown in Table 2.
Operating voltage: 12V；The method of operation: work 1.5s, rest 28.5s；Experimental condition: air-cooled, motor surface temperature is not
More than 50 DEG C.
Reference examples 2
1, colloid powder is prepared
It is graphite powder 79 according to weight, phenol-formaldehyde resin powder 18, tungsten disulfide 3, acetone 30 gets out raw material, then
Graphite, phenolic resin, tungsten disulfide are mixed into 35min at normal temperature, obtain colloid powder initial material；Then colloid powder is added in acetone
35min is mixed in initial material, is uniformly mixed, and colloid powder mixture is made；Finally by colloid powder mixture 50-55 DEG C at a temperature of
After drying 12h, through break process, colloid powder is made.
2, high copper feed powder is prepared
It is colloid powder 45 according to weight, copper powder 52, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and high copper feed powder is made.
3, low copper containing amount feed powder is prepared
It is colloid powder 72 according to weight, copper powder 25, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and low copper containing amount feed powder is made.
4, compression process
First high copper feed powder is put into the mold；High copper material low copper containing amount feed powder being put into again in mold
On powder；Then, within by copper soft whipping wire via the low copper containing amount feed powder insertion high copper feed powder in mold；Wherein, Gao Han
Amount of copper feed powder layer is the 65% of total mixture thickness；Low copper containing amount feed powder layer is the 35% of total mixture thickness；Copper soft whipping wire
Plug wire depth is 3/5 of total thickness of feed layer in the mold.Compression process is carried out to the mixture in mold using press device,
Carbon brush green compact is made, wherein the 3.5 tons/cm of unit pressure of compression process2。
5, sintering and finished product working process
The carbon brush green compact suppressed is placed with high temperature sintering furnace, is sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:25%；Sintering process conditions are as follows: by temperature rise in high temperature sintering furnace in 15h
To 700 DEG C, up to carbon brush first product after being cooled to room temperature；Finished product working process is carried out to carbon brush first product, carbon brush finished product is made.
Physical performance index detection is carried out to carbon brush finished product, testing result is shown in Table 1.
Performance test is carried out to carbon brush finished product according to following test conditions and test method, detection carbon brush finished product uses the longevity
Life and wear rate, test result are shown in Table 2.
Operating voltage: 12V；The method of operation: work 1.5s, rest 28.5s；Experimental condition: air-cooled, motor surface temperature is not
More than 50 DEG C.
Reference examples 3
1, colloid powder is prepared
It is graphite powder 79 according to weight, phenol-formaldehyde resin powder 18, petroleum coke 3, acetone 30 gets out raw material, then will
Graphite, phenolic resin and petroleum coke mix 30min at normal temperature, obtain colloid powder initial material；Then at the beginning of colloid powder being added in acetone
35min is mixed in material, is uniformly mixed, and colloid powder mixture is made；Finally by colloid powder mixture 50-55 DEG C at a temperature of dry
After dry 12h, through break process, colloid powder is made.
2, high copper feed powder is prepared
It is colloid powder 45 according to weight, copper powder 52, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and high copper feed powder is made.
3, low copper containing amount feed powder is prepared
It is colloid powder 72 according to weight, copper powder 25, molybdenum disulfide 3 gets out raw material, then by colloid powder, copper powder
60min is mixed at normal temperature with molybdenum disulfide, is uniformly mixed, and low copper containing amount feed powder is made.
4, compression process
First high copper feed powder is put into the mold；High copper material low copper containing amount feed powder being put into again in mold
On powder；Then, within by copper soft whipping wire via the low copper containing amount feed powder insertion high copper feed powder in mold；Wherein, Gao Han
Amount of copper feed powder layer is the 65% of total mixture thickness；Low copper containing amount feed powder layer is the 35% of total mixture thickness；Copper soft whipping wire
Plug wire depth is 3/5 of total thickness of feed layer in the mold.Compression process is carried out to the mixture in mold using press device,
Carbon brush green compact is made, wherein the 3.5 tons/cm of unit pressure of compression process2。
5, sintering and finished product working process
The carbon brush green compact suppressed is placed with high temperature sintering furnace, is sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:25%；Sintering process conditions are as follows: by temperature rise in high temperature sintering furnace in 15h
To 700 DEG C, up to carbon brush first product after being cooled to room temperature；Finished product working process is carried out to carbon brush first product, carbon brush finished product is made.
Physical performance index detection is carried out to carbon brush finished product, testing result is shown in Table 1.
Performance test is carried out to carbon brush finished product according to following test conditions and test method, detection carbon brush finished product uses the longevity
Life and wear rate, test result are shown in Table 2.
Operating voltage: 12V；The method of operation: work 1.5s, rest 28.5s；Experimental condition: air-cooled, motor surface temperature is not
More than 50 DEG C.
1 carbon brush finished product quantitative measurement table of table
2 carbon brush finished product performance test of table tests table
From the data in table 1, it can be seen that the passenger car start and stop carbon brush used for electric engine function admirable of the method for the present invention preparation, bulk density are
3.15-3.30g/cm3, resistivity is 0.40-0.60 μ Ω .m, Rockwell hardness (HR10/392) 85-110.
From the data in table 2, it can be seen that reference examples 1 are being prepared in the colloid powder stage that petroleum coke and tungsten disulfide, preparation is not added
Carbon brush service life it is most short, only 140,000 times, the decline of 10 Wan Cihou power is maximum, has dropped 15%；Reference examples 2 are preparing glue
That petroleum coke is not added in the matter powder stage, the carbon brush service life of preparation is shorter, is 180,000 times, 10 Wan Cihou power have dropped
12%；Reference examples 3 are being prepared that tungsten disulfide is not added in the colloid powder stage, and the carbon brush service life of preparation is shorter, are 230,000
Secondary, 10 Wan Cihou power have dropped 11%；Two the method for the present invention joined petroleum coke and curing in the colloid powder stage preparing
Tungsten, the carbon brush long service life of preparation reach 25-28 ten thousand times, carbon brush grind it is small, power decline be no more than 10%.
Claims (3)
1. a kind of preparation method of passenger car start and stop carbon brush used for electric engine characterized by comprising
Graphite, phenolic resin, tungsten disulfide, petroleum coke and acetone are uniformly mixed, is made and contains tungsten disulfide, petroleum coke and third
The colloid powder of ketone；
Colloid powder, copper powder and the molybdenum disulfide containing tungsten disulfide, petroleum coke and acetone is uniformly mixed, is made and contains two
The high copper feed powder of tungsten sulfide, petroleum coke and acetone；
Colloid powder, copper powder and the molybdenum disulfide containing tungsten disulfide, petroleum coke and acetone is uniformly mixed, is made and contains two
The low copper containing amount feed powder of tungsten sulfide, petroleum coke and acetone；
By containing tungsten disulfide, petroleum coke and acetone high copper feed powder and low copper containing amount feed powder be added separately to pressing die
In tool, compression process, sintering processes and grinding processing are successively carried out to it, carbon brush finished product is made；
Wherein, the high copper feed powder and low copper containing amount feed powder are added separately in compacting tool set to include: first to contain by described in
There is the high copper feed powder of tungsten disulfide, petroleum coke and acetone to be put into the mold；Described it will contain tungsten disulfide, petroleum again
Burnt and acetone low copper containing amount feed powder is put on the high copper feed powder in the mold；
Then, copper soft whipping wire is inserted via the low copper containing amount feed powder containing tungsten disulfide, petroleum coke and acetone in the mold
Enter within the high copper feed powder containing tungsten disulfide, petroleum coke and acetone；
Wherein, the weight of the graphite, phenolic resin, tungsten disulfide, petroleum coke and acetone is 74-78:15-20:2-
5:1-5:25-35；
Wherein, the weight of colloid powder, copper powder and molybdenum disulfide is 42-47:51-53:2- in the high copper feed powder
5；
Wherein, the weight of colloid powder, copper powder and molybdenum disulfide is 71-75:20-28:1- in the low copper containing amount feed powder
5。
2. preparation method according to claim 1, which is characterized in that it is described by graphite, phenolic resin, tungsten disulfide,
Petroleum coke and acetone are uniformly mixed, and colloid powder is made and includes:
Graphite, phenolic resin, tungsten disulfide and petroleum coke are uniformly mixed, colloid powder initial material is made；
Acetone is added in the colloid powder initial material and is uniformly mixed, colloid powder mixture is made；
The colloid powder mixture is dried, be crushed and sieving processing, the colloid powder is made.
3. preparation method according to claim 1, which is characterized in that the high copper feed powder is total mixture thickness
60-70%；The low copper containing amount feed powder is the 30-40% of total mixture thickness；The plug wire depth of the copper soft whipping wire is described
The 1/2-2/3 of total mixture thickness in mold.
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| RU2058639C1 (en) * | 1992-12-28 | 1996-04-20 | Государственный научно-исследовательский институт конструкционных материалов на основе графита | Material for electric brushes and its production process |
| CN101134675A (en) * | 2007-08-07 | 2008-03-05 | 哈尔滨工程大学 | Preparation method of graphite radical composite material |
| CN102130407A (en) * | 2010-12-24 | 2011-07-20 | 苏州东南碳制品有限公司 | Carbon brush for truck starting motor as well as manufacture method and application thereof |
| CN102856758A (en) * | 2012-09-21 | 2013-01-02 | 丽水市长新电器制造有限公司 | Electric brush for ABS system and preparation method thereof |
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2015
- 2015-09-08 CN CN201510564440.4A patent/CN106505397B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2058639C1 (en) * | 1992-12-28 | 1996-04-20 | Государственный научно-исследовательский институт конструкционных материалов на основе графита | Material for electric brushes and its production process |
| CN101134675A (en) * | 2007-08-07 | 2008-03-05 | 哈尔滨工程大学 | Preparation method of graphite radical composite material |
| CN102130407A (en) * | 2010-12-24 | 2011-07-20 | 苏州东南碳制品有限公司 | Carbon brush for truck starting motor as well as manufacture method and application thereof |
| CN102856758A (en) * | 2012-09-21 | 2013-01-02 | 丽水市长新电器制造有限公司 | Electric brush for ABS system and preparation method thereof |
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