CN106299968B - A kind of preparation method of pencil capitiform seat motor carbon brush - Google Patents
A kind of preparation method of pencil capitiform seat motor carbon brush Download PDFInfo
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- CN106299968B CN106299968B CN201510256133.XA CN201510256133A CN106299968B CN 106299968 B CN106299968 B CN 106299968B CN 201510256133 A CN201510256133 A CN 201510256133A CN 106299968 B CN106299968 B CN 106299968B
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Abstract
The present invention provides a kind of preparation method of pencil capitiform seat motor carbon brush, including：Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder are uniformly mixed obtained high connductivity layer mixture；High lubricant layer mixture is uniformly made in electrolytic copper powder, native graphite, phenol-formaldehyde resin powder and mix lubricant containing methenamine；High connductivity layer mixture and high lubricant layer mixture are added separately to carry out compression process in mold, carbon brush green compact is made；Carbon brush green compact is sintered and grinding is handled, carbon brush is made.Seat motor of the present invention is compound using high connductivity layer and high lubricant layer with carbon brush, and with peculiar shape, close to commutator be on one side bending cambered surface, it can be always ensured that high lubricant layer front end is protruded to contact with commutator, therefore the carbon brush prepared conducts electricity very well, rub resistance, and noise is small.
Description
Technical field
The present invention relates to a kind of preparation methods of pencil capitiform seat motor carbon brush, and in particular to a kind of to be layered what is suppressed
The preparation method of seat motor carbon brush belongs to electrical carbon field.
Background technology
With car popularizing in modern society, people are also higher and higher to the various requirement of car.Have in car inner
Various motors facilitate the operation of user's each system to car.By taking seat system as an example, the lifting of seat, front and rear shifting
Dynamic, hue angle is all driven by motor.Such motor is generally using low pressure (generally 12V or so) brush direct current motor.Due to seat
Chair motor is close to the users, therefore the requirement to its noise is very high.Inside noise system, the break-in of carbon brush and commutator occupies
Most of ratio, therefore higher requirement also itself proposes to such carbon brush material, structure.
The seat motor used at present with carbon brush generally using copper powder, graphite powder and binding agent be molded fine copper soft whipping wire into
Type is sintered, is process, and in general carbon brush body is a kind of uniform component.Such carbon brush is in the current basic energy of application
Meet the requirement of motor power performance, but its noise performance cannot increasingly meet the requirement of user.
The seat motor carbon brush of the present invention based on seat motor to the rigors of noise, makes every effort to reduce carbon brush with changing
The noise generated to device break-in, that is, increase lubrication, reduce spark etc..Carbon brush body is suppressed using two kinds of components, both
In component, for one kind for high lubricant layer, one kind is high connductivity layer, two layers it is compound after achieve the purpose that low pressure drop, low noise.
Invention content
The present invention is insufficient present in existing seat motor carbon brush technology in order to overcome, and provides a kind of pencil capitiform seat
The preparation method of carbon brush used for electric engine, the present invention by by high lubricant layer and high connductivity layer compound suppressing and being ground out special cambered surface,
The carbon brush of low pressure drop, low noise is prepared, reaches increase lubrication, reduces spark, improve the purpose of Service Life of Carbon Brush.
The present invention provides a kind of preparation methods of pencil capitiform seat motor carbon brush, include the following steps：
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder are uniformly mixed, high connductivity layer mixture is made；
Electrolytic copper powder, native graphite and mix lubricant containing methenamine is uniform, high lubricant layer mixture is made；
The high connductivity layer mixture and high lubricant layer mixture are added separately in mold, 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 carbon brush first product, obtains carbon brush finished product.
Wherein, the weight of each raw material of high connductivity layer mixture is：Electrolytic copper powder 30-60, native graphite 40-
The sum of parts by weight of 70, phenol-formaldehyde resin powder 20-40, the electrolytic copper powder and native graphite are 100 parts.
Particularly, the weight of each raw material of high connductivity layer mixture is preferably：Electrolytic copper powder 45-55, naturally
The sum of parts by weight of graphite 45-55, phenol-formaldehyde resin powder 25-35, the electrolytic copper powder and native graphite are 100 parts.
Especially, the copper content of the electrolytic copper powder is >=99%, and granularity is -300 mesh, and pine dress ratio is 0.8-1.9g/
cm3。
Particularly, the native graphite is black scale like powder, and granularity is -100 mesh.
Especially, the phenol-formaldehyde resin powder is yellow powder, is thermosetting phenolic resin, and granularity is+200 mesh.
Wherein, the time of the obtained high connductivity layer mixture is 10-120min, preferably 20-80min.
Wherein, the weight of high each raw material of lubricant layer mixture is：Electrolytic copper powder 5-45, native graphite 50-
The sum of 90, lubricant 2-6, phenol-formaldehyde resin powder 20-40, parts by weight of the electrolytic copper powder, native graphite and lubricant are 100
Part.
Particularly, the weight of high each raw material of lubricant layer mixture is preferably：Electrolytic copper powder 15-45, naturally
Graphite 50-85, lubricant 4.5-6, phenol-formaldehyde resin powder 25-35, the parts by weight of the electrolytic copper powder, native graphite and lubricant it
Be 100 parts.
Especially, the copper content of the electrolytic copper powder is >=99%, and granularity is -300 mesh, and pine dress ratio is 0.8-1.9g/
cm3。
Particularly, the native graphite is black scale like powder, and granularity is -100 mesh.
Especially, the phenol-formaldehyde resin powder is yellow powder, is thermosetting phenolic resin, and granularity is+200 mesh.
Wherein, in the lubricant, the weight of the methenamine and other raw materials is：Methenamine 5-
10；Other raw materials are 90-150.
Particularly, other raw materials of the lubricant include natural graphite powder, molybdenum disulfide and liquid phenolic resin, with
The weight of methenamine is：
Methenamine 5-10, natural graphite powder 35-55；
Methenamine 5-10, molybdenum disulfide 35-55；
Methenamine 5-10, liquid phenolic resin 20-40；
The sum of parts by weight of the natural graphite powder, molybdenum disulfide and methenamine are 100 parts.
Especially, the weight of the natural graphite powder, molybdenum disulfide and liquid phenolic resin and methenamine is excellent
It is selected as：
Methenamine 6-8, natural graphite powder 40-50；
Methenamine 6-8, molybdenum disulfide 40-50；
Methenamine 6-8, liquid phenolic resin 15-35；
The sum of parts by weight of the natural graphite powder, molybdenum disulfide and methenamine are 100 parts.
Wherein, the methenamine white crystalline powder, purity >=99%.
Methenamine is commonly used for the curing agent of resin and plastics, and the addition of methenamine can enhance the intensity of carbon brush, protects
Carbon brush is demonstrate,proved while lubricity is improved without reducing intensity.
Particularly, the molybdenum disulfide is grey black solid powder, and granularity is -300 mesh, and molybdenum disulfide has extremely low
Friction coefficient and higher PV characteristics, greasy property is good, and compression strength is big.
Especially, the natural graphite powder is Spherical graphite particles, and granularity is the mesh of -300 mesh~+40.
Particularly, the liquid phenolic resin be brown liquid, solid content >=60%.
Suitable lubricant is added in high lubricant layer, the lubricity of the high lubricant layer of carbon brush can be significantly improved, so as to drop
Low-carbon brush and the noise of commutator break-in.Using two emollient component collaboration lubrications, molybdenum disulfide and graphite can fit lubricant
Answer various working environment.Lubricant can be such that the two is more uniformly distributed by liquid resin, so as to reach two kinds of emollient components
" fusion " in particle rank.
Wherein, the obtained high lubricant layer mixture includes：
At normal temperatures, natural graphite powder, molybdenum disulfide and methenamine are uniformly mixed, lubricant initial material is made；
Liquid phenolic resin is added in the lubricant initial material and is stirred evenly, mix lubricant material is made；
Processing is crushed to the mix lubricant material that the volatile matter has vapored away, lubricant is made；
The lubricant is added to tentatively uniformly mixed electrolytic copper powder, natural graphite powder and phenol-formaldehyde resin powder
In, it stirs evenly, high lubricant layer mixture is made.
Wherein, described add in liquid phenolic resin in the lubricant initial material stirs evenly obtained mix lubricant material packet
It includes：
The lubricant initial material is heated to 80-100 DEG C, liquid phenolic resin is added thereto stirring 10-60min, is obtained
To solid mix lubricant material.
Particularly, processing is crushed to the mix lubricant material that the volatile matter has vapored away, it is -40 that granularity, which is made,
Purpose lubricant.
Wherein, after the electrolytic copper powder, natural graphite powder and phenol-formaldehyde resin powder being mixed evenly, then by the lubrication
Agent is added thereto, and high lubricant layer mixture is made.
Particularly, the time that the electrolytic copper powder, natural graphite powder and phenol-formaldehyde resin powder are mixed evenly is 5-
60min, preferably 5-30min.
Especially, the lubricant is added to electrolytic copper powder, natural graphite powder and phenolic resin by evenly mixing
The time stirred evenly in powder is 10-120min, preferably 20-80min.
Wherein, the high connductivity layer mixture and high lubricant layer mixture are added separately to mold and included：
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in the mold；
The high lubricant layer mixture is put on the high connductivity layer mixture in the mold again；
Then, the remaining high connductivity layer mixture is put on the high lubricant layer mixture in the mold
Form second layer high connductivity layer mixture；
Then, brush lead is inserted within the mixture in the mold.
Wherein, 1/4-2/5 of the first layer high connductivity layer mixing bed of material for total mixing thickness of feed layer.
Particularly, 1/5-1/2 of the high lubricant layer mixing bed of material for total mixing thickness of feed layer.
Especially, 1/4-2/5 of the second layer high connductivity layer mixing bed of material for total mixing thickness of feed layer.
Particularly, 1/2-4/5 of the plug wire depth of the brush lead always to mix thickness of feed layer in the mold.
Especially, the brush lead is copper soft whipping wire.
Wherein, compression process is carried out to the mixture in the mold, carbon brush green compact is made.
Particularly, the 2-5 tons/cm of unit pressure of the compression process2。
Wherein, the carbon brush green compact is sintered, carbon brush first product is made.
Particularly, the treatment temperature of the sintering processes is 500-800 DEG C, processing time 8.5-27h.
Especially, the temperature of sintering furnace is increased to 500-800 DEG C in 8-25h, keeps the temperature 0.5-2h at this temperature.
Particularly, the carbon brush green compact is is sintered by the sintering processes under nitrogen and hydrogen shield, institute
The ratio for stating nitrogen and hydrogen is 50-90%:10-50%.
Wherein, grinding processing is carried out to the carbon brush first product, obtains the carbon brush finished product that its section is pencil capitiform.
The carbon brush first product carries out grinding processing so that carbon brush finished product section obtained is pencil capitiform, is always ensured that height
Lubricant layer front end protrudes and is contacted with commutator, and high connductivity layer does not contact commutator, and carbon brush is made to be contacted with commutator from face and is become
Line contacts, and reduces the friction between carbon brush and commutator, reduces noise.
Advantages of the present invention and advantageous effects are as follows：
1st, the preparation method of pencil capitiform seat motor carbon brush of the present invention is compound using high connductivity layer and high lubricant layer, high
Different material formula is respectively adopted in conductive layer and high lubricant layer, and high connductivity layer resistivity of material is low, conducts electricity very well, high lubricant layer
Material friction coefficient is low, and greasy property is good, and noise is small, two layers it is compound after achieve the purpose that low pressure drop, low noise.
2nd, the lubricant in the high lubricant layer of pencil capitiform seat motor carbon brush of the present invention uses the graphite of particular size
Powder and molybdenum disulfide collaboration lubrication, can reach good lubricant effect, improve the greasy property of high lubricant layer, reduce and change
Friction to device.
3rd, methenamine, Wu Luo are added in the lubricant in the high lubricant layer of pencil capitiform seat motor carbon brush of the present invention
Tropine is a kind of preferable resinae curing agent, and the addition of methenamine can increase the intensity of material, avoid conventional carbon brush
The defects of lubricity and intensity cannot get both in product makes the carbon brush of the present invention ensure that the strong of carbon brush while increasing and lubricating
Degree increases the carbon brush service life.
4th, pencil capitiform seat motor of the present invention carbon brush has peculiar shape, and section is pencil capitiform, can be protected always
High lubricant layer front end protrusion is demonstrate,proved to contact with commutator, and high connductivity layer does not contact commutator, and carbon brush is made to be contacted with commutator by face
Become line contact, reduce the friction between carbon brush and commutator, reduce noise.
5th, pencil capitiform seat motor carbon brush function admirable of the present invention, bulk density 2-3.5g/cm3, resistivity is
0.05-20 μ Ω .m, Shore hardness 10-30HS.
Description of the drawings
Fig. 1 is the sectional view of pencil capitiform seat motor carbon brush of the present invention；
Fig. 2 is the vertical view of pencil capitiform seat motor carbon brush of the present invention.
Reference sign：
1st, high connductivity layer；2nd, high lubricant layer；3rd, brush lead.
Specific embodiment
With reference to embodiments and attached drawing illustrates invention.The advantages and features of the present invention will be with description and more
It is clear.But these embodiments are only exemplary, do not form any restrictions to the scope of the present invention.Those skilled in the art
It should be understood that can be carried out without departing from the spirit and scope of the invention to the details and form of technical solution of the present invention
Modifications or substitutions, but these modifications and replacement are each fallen in protection scope of the present invention.
Embodiment 1
1st, high connductivity layer mixture is prepared
It is electrolytic copper powder 50 according to weight, native graphite 50, phenol-formaldehyde resin powder 25 gets out raw material, then will be electric
Solution copper powder, native graphite and phenol-formaldehyde resin powder are added in mixing apparatus, and mixing 50min is stirred at room temperature, is made highly conductive
Layer mixture.
2nd, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 45 according to weight, molybdenum disulfide 48, methenamine 7, liquid phenolic resin 30 prepares
Natural graphite powder, molybdenum disulfide and methenamine, are then uniformly mixed by good raw material at normal temperatures, and lubricant initial material is made；
Lubricant initial material is heated to 90 DEG C, then liquid phenolic resin is added thereto, is stirred 40min, is made
Solid mix lubricant material；
Processing is crushed to solid lubricant mixture, then crosses 40 mesh sieve, the lubricant that granularity is -40 mesh is made.
(2) it is electrolytic copper powder 43 according to weight, native graphite 55, lubricant 2, phenol-formaldehyde resin powder 30 gets out original
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder, are then added in mixing apparatus by material, and mixing 30min is stirred at room temperature.
(3) by lubricant made from step (1) be added to electrolytic copper powder, native graphite that step (2) mixed and
In phenol-formaldehyde resin powder, 70min is stirred, high lubricant layer mixture is made.
3rd, compression process
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in mold, then height is lubricated
Layer mixture is put on the high connductivity layer mixture in mold, and then remaining high connductivity layer mixture is put into mold
Second layer high connductivity layer mixture is formed on high lubricant layer mixture, then copper soft whipping wire is inserted within mixture；Wherein,
First layer high connductivity layer mixture is the 2/5 of total mixture thickness, and high lubricant layer mixture is the 1/5 of total mixture thickness, the
Two floor height conductive layer mixtures are the 2/5 of total mixture thickness；The plug wire depth of copper soft whipping wire is the 3/5 of total thickness of feed layer；It adopts
Compression process is carried out to the mixture in mold with press device, carbon brush green compact, the wherein unit pressure 3 of compression process is made
Ton/cm2。
4th, sintering processes
The carbon brush green compact suppressed is placed in high temperature sintering furnace, being sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 70%:30%；Sintering process conditions are：By Wen Sheng in high temperature sintering furnace in 15h
To 700 DEG C, 1h is then kept the temperature, up to carbon brush first product after being cooled to room temperature；Physical performance index detection, inspection are carried out to carbon brush first product
Survey the results are shown in Table 1.
5th, finished product working process
To carbon brush first product carry out grinding processing to get；As shown in Figure 1, 2, carbon brush produced by the present invention is perpendicular to the arc
Face is contacted with the handing-over line of high lubricant layer front end with commutator.
Embodiment 2
1st, high connductivity layer mixture is prepared
It is electrolytic copper powder 45 according to weight, native graphite 55, phenol-formaldehyde resin powder 30 gets out raw material, then will be electric
Solution copper powder, native graphite and phenol-formaldehyde resin powder are added in mixing apparatus, and mixing 10min is stirred at room temperature, is made highly conductive
Layer mixture.
2nd, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 35 according to weight, molybdenum disulfide 55, methenamine 10, liquid phenolic resin 20 prepares
Natural graphite powder, molybdenum disulfide and methenamine, are then uniformly mixed by good raw material at normal temperatures, and lubricant initial material is made；
Lubricant initial material is heated to 100 DEG C, then liquid phenolic resin is added thereto, is stirred 60min, is made
Solid mix lubricant material；
Processing is crushed to solid lubricant mixture, then crosses 40 mesh sieve, the lubricant that granularity is -40 mesh is made.
(2) it is electrolytic copper powder 45 according to weight, native graphite 50, lubricant 5, phenol-formaldehyde resin powder 35 gets out original
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder, are then added in mixing apparatus by material, and mixing 20min is stirred at room temperature.
(3) by lubricant made from step (1) be added to electrolytic copper powder, native graphite that step (2) mixed and
In phenol-formaldehyde resin powder, 90min is stirred, high lubricant layer mixture is made.
3rd, compression process
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in mold, then height is lubricated
Layer mixture is put on the high connductivity layer mixture in mold, and then remaining high connductivity layer mixture is put into mold
Second layer high connductivity layer mixture is formed on high lubricant layer mixture, then copper soft whipping wire is inserted within mixture；Wherein,
First layer high connductivity layer mixture is the 1/4 of total mixture thickness, and high lubricant layer mixture is the 1/2 of total mixture thickness, the
Two floor height conductive layer mixtures are the 1/4 of total mixture thickness；The plug wire depth of copper soft whipping wire is the 3/4 of total thickness of feed layer；It adopts
Compression process is carried out to the mixture in mold with press device, carbon brush green compact, the wherein unit pressure 4 of compression process is made
Ton/cm2。
4th, sintering processes
The carbon brush green compact suppressed is placed in high temperature sintering furnace, being sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 80%:20%；Sintering process conditions are：By Wen Sheng in high temperature sintering furnace in 25h
To 800 DEG C, 0.5h is then kept the temperature, up to carbon brush first product after being cooled to room temperature；Physical performance index detection is carried out to carbon brush first product,
Testing result is shown in Table 1.
5th, finished product working process
To carbon brush first product carry out grinding processing to get；As shown in Figure 1, 2, carbon brush produced by the present invention is contacted with commutator
Side for curved surface, the cambered surface is contacted with the handing-over line of high lubricant layer front end with commutator.
Embodiment 3
1st, high connductivity layer mixture is prepared
It is electrolytic copper powder 55 according to weight, native graphite 45, phenol-formaldehyde resin powder 40 gets out raw material, then will be electric
Solution copper powder, native graphite and phenol-formaldehyde resin powder are added in mixing apparatus, and mixing 80min is stirred at room temperature, is made highly conductive
Layer mixture.
2nd, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 40 according to weight, molybdenum disulfide 54, methenamine 6, liquid phenolic resin 25 prepares
Natural graphite powder, molybdenum disulfide and methenamine, are then uniformly mixed by good raw material at normal temperatures, and lubricant initial material is made；
Lubricant initial material is heated to 85 DEG C, then liquid phenolic resin is added thereto, is stirred 30min, is made
Solid mix lubricant material；
Processing is crushed to solid lubricant mixture, then crosses 40 mesh sieve, the lubricant that granularity is -40 mesh is made.
(2) it is electrolytic copper powder 5 according to weight, native graphite 89, lubricant 6, phenol-formaldehyde resin powder 20 gets out original
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder, are then added in mixing apparatus by material, and mixing 5min is stirred at room temperature.
(3) by lubricant made from step (1) be added to electrolytic copper powder, native graphite that step (2) mixed and
In phenol-formaldehyde resin powder, 120min is stirred, high lubricant layer mixture is made.
3rd, compression process
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in mold, then height is lubricated
Layer mixture is put on the high connductivity layer mixture in mold, and then remaining high connductivity layer mixture is put into mold
Second layer high connductivity layer mixture is formed on high lubricant layer mixture, then copper soft whipping wire is inserted within mixture；Wherein,
First layer high connductivity layer mixture is the 2/5 of total mixture thickness, and high lubricant layer mixture is the 3/10 of total mixture thickness, the
Two floor height conductive layer mixtures are the 3/10 of total mixture thickness；The plug wire depth of copper soft whipping wire is the 7/10 of total thickness of feed layer；
Compression process is carried out to the mixture in mold using press device, carbon brush green compact, the wherein unit pressure 5 of compression process is made
Ton/cm2。
4th, sintering processes
The carbon brush green compact suppressed is placed in high temperature sintering furnace, being sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 90%:10%；Sintering process conditions are：Temperature in high temperature sintering furnace is risen in 8h
500 DEG C, 2h is then kept the temperature, up to carbon brush first product after being cooled to room temperature；Physical performance index detection, detection are carried out to carbon brush first product
It the results are shown in Table 1.
5th, finished product working process
To carbon brush first product carry out grinding processing to get；As shown in Figure 1, 2, carbon brush produced by the present invention is contacted with commutator
Side for curved surface, the cambered surface is contacted with the handing-over line of high lubricant layer front end with commutator.
Embodiment 4
1st, high connductivity layer mixture is prepared
It is electrolytic copper powder 30 according to weight, native graphite 70, phenol-formaldehyde resin powder 20 gets out raw material, then will be electric
Solution copper powder, native graphite and phenol-formaldehyde resin powder are added in mixing apparatus, and mixing 120min is stirred at room temperature, is made highly conductive
Layer mixture.
2nd, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 55 according to weight, molybdenum disulfide 35, methenamine 10, liquid phenolic resin 35 prepares
Natural graphite powder, molybdenum disulfide and methenamine, are then uniformly mixed by good raw material at normal temperatures, and lubricant initial material is made；
Lubricant initial material is heated to 80 DEG C, then liquid phenolic resin is added thereto, is stirred 10min, is made
Solid mix lubricant material；
Processing is crushed to solid lubricant mixture, then crosses 40 mesh sieve, the lubricant that granularity is -40 mesh is made.
(2) it is electrolytic copper powder 30 according to weight, native graphite 66, lubricant 4, phenol-formaldehyde resin powder 40 gets out original
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder, are then added in mixing apparatus by material, and mixing 10min is stirred at room temperature.
(3) by lubricant made from step (1) be added to electrolytic copper powder, native graphite that step (2) mixed and
In phenol-formaldehyde resin powder, 40min is stirred, high lubricant layer mixture is made.
3rd, compression process
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in mold, then height is lubricated
Layer mixture is put on the high connductivity layer mixture in mold, and then remaining high connductivity layer mixture is put into mold
Second layer high connductivity layer mixture is formed on high lubricant layer mixture, then copper soft whipping wire is inserted within mixture；Wherein,
First layer high connductivity layer mixture is the 1/4 of total mixture thickness, and high lubricant layer mixture is the 2/5 of total mixture thickness, the
Two floor height conductive layer mixtures are the 7/20 of total mixture thickness；The plug wire depth of copper soft whipping wire is the 4/5 of total thickness of feed layer；It adopts
Compression process is carried out to the mixture in mold with press device, carbon brush green compact, the wherein unit pressure 2 of compression process is made
Ton/cm2。
4th, sintering processes
The carbon brush green compact suppressed is placed in high temperature sintering furnace, being sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 50%:50%；Sintering process conditions are：By Wen Sheng in high temperature sintering furnace in 20h
To 700 DEG C, 1.5h is then kept the temperature, up to carbon brush first product after being cooled to room temperature；Physical performance index detection is carried out to carbon brush first product,
Testing result is shown in Table 1.
5th, finished product working process
To carbon brush first product carry out grinding processing to get；As shown in Figure 1, 2, carbon brush produced by the present invention is contacted with commutator
Side for curved surface, the cambered surface is contacted with the handing-over line of high lubricant layer front end with commutator.
Embodiment 5
1st, high connductivity layer mixture is prepared
It is electrolytic copper powder 60 according to weight, native graphite 40, phenol-formaldehyde resin powder 35 gets out raw material, then will be electric
Solution copper powder, native graphite and phenol-formaldehyde resin powder are added in mixing apparatus, and mixing 20min is stirred at room temperature, is made highly conductive
Layer mixture.
2nd, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 50 according to weight, molybdenum disulfide 45, methenamine 5, liquid phenolic resin 40 prepares
Natural graphite powder, molybdenum disulfide and methenamine, are then uniformly mixed by good raw material at normal temperatures, and lubricant initial material is made；
Lubricant initial material is heated to 95 DEG C, then liquid phenolic resin is added thereto, is stirred 200min, is made
Solid mix lubricant material；
Processing is crushed to solid lubricant mixture, then crosses 40 mesh sieve, the lubricant that granularity is -40 mesh is made.
(2) it is electrolytic copper powder 7 according to weight, native graphite 90, lubricant 3, phenol-formaldehyde resin powder 25 gets out original
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder, are then added in mixing apparatus by material, and mixing 60min is stirred at room temperature.
(3) by lubricant made from step (1) be added to electrolytic copper powder, native graphite that step (2) mixed and
In phenol-formaldehyde resin powder, 10min is stirred, high lubricant layer mixture is made.
3rd, compression process
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in mold, then height is lubricated
Layer mixture is put on the high connductivity layer mixture in mold, and then remaining high connductivity layer mixture is put into mold
Second layer high connductivity layer mixture is formed on high lubricant layer mixture, then copper soft whipping wire is inserted within mixture；Wherein,
First layer high connductivity layer mixture is the 7/20 of total mixture thickness, and high lubricant layer mixture is the 1/4 of total mixture thickness, the
Two floor height conductive layer mixtures are the 2/5 of total mixture thickness；The plug wire depth of copper soft whipping wire is the 1/2 of total thickness of feed layer；It adopts
Compression process is carried out to the mixture in mold with press device, carbon brush green compact, the wherein unit pressure 3.5 of compression process is made
Ton/cm2。
4th, sintering processes
The carbon brush green compact suppressed is placed in high temperature sintering furnace, being sintered place to it under nitrogen and hydrogen shield
Reason；Wherein, the ratio of nitrogen and hydrogen is 60%:40%；Sintering process conditions are：By Wen Sheng in high temperature sintering furnace in 10h
To 600 DEG C, 1h is then kept the temperature, up to carbon brush first product after being cooled to room temperature；Physical performance index detection, inspection are carried out to carbon brush first product
Survey the results are shown in Table 1.
5th, finished product working process
To carbon brush first product carry out grinding processing to get；As shown in Figure 1, 2, carbon brush produced by the present invention is contacted with commutator
Side for curved surface, the cambered surface is contacted with the handing-over line of high lubricant layer front end with commutator.
1 carbon brush physical property of table detects table
| Performance indicator | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Bulk density (g/cm3) | 3.00 | 2.89 | 2.90 | 2.46 | 2.95 |
| Resistivity (μ Ω .m) | 0.80 | 1.85 | 1.65 | 2.05 | 1.05 |
| Shore hardness (HS) | 20 | 22 | 20 | 25 | 20 |
Claims (8)
1. a kind of preparation method of pencil capitiform seat motor carbon brush, which is characterized in that include the following steps：
Electrolytic copper powder, native graphite and phenol-formaldehyde resin powder are uniformly mixed, seat motor high connductivity layer mixture is made；
Electrolytic copper powder, native graphite, phenol-formaldehyde resin powder and mix lubricant containing methenamine is uniform, seat motor is made
With high lubricant layer mixture；
The high connductivity layer mixture and high lubricant layer mixture are added separately in mold, compression process is carried out to it, is made
Obtain seat motor carbon brush green compact；
The carbon brush green compact is sintered, seat motor carbon brush first product is made；
Grinding processing is carried out to the carbon brush first product, obtains seat motor carbon brush finished product；
Wherein, the weight of each raw material of high connductivity layer mixture is：Electrolytic copper powder 30-60, native graphite 40-70,
The sum of parts by weight of phenol-formaldehyde resin powder 20-40, the electrolytic copper powder and native graphite are 100 parts；
Wherein, the weight of high each raw material of lubricant layer mixture is：Electrolytic copper powder 5-45, native graphite 50-90, profit
The sum of lubrication prescription 2-6, phenol-formaldehyde resin powder 20-40, parts by weight of the electrolytic copper powder, native graphite and lubricant are 100 parts；
Wherein, in the lubricant, the weight of the methenamine and other raw materials is：Methenamine 5-10；Its
His raw material is 90-150；
Particularly, other raw materials of the lubricant include native graphite, molybdenum disulfide and liquid phenolic resin, with Wu Luotuo
The weight of product is：Methenamine 5-10, native graphite 35-55, molybdenum disulfide 35-55, liquid phenolic resin 20-40.
2. preparation method as described in claim 1, which is characterized in that the obtained high lubricant layer mixture includes：
At normal temperatures, native graphite, molybdenum disulfide and methenamine are uniformly mixed, lubricant initial material is made；
Liquid phenolic resin is added in the lubricant initial material and is stirred evenly, mix lubricant material is made；
Volatile matter in the mix lubricant material is vapored away, processing is then crushed to it, lubricant is made；
The lubricant is added in tentatively uniformly mixed electrolytic copper powder, native graphite and phenol-formaldehyde resin powder, stirring
Uniformly, high lubricant layer mixture is made.
3. preparation method as described in claim 1, which is characterized in that mix the high connductivity layer mixture and high lubricant layer
It closes and expects that being added separately to mold successively includes：
A part of high connductivity layer mixture is first put into formation first layer high connductivity layer mixture in the mold；
The high lubricant layer mixture is put on the high connductivity layer mixture in the mold again；
Then, it is formed on the high lubricant layer mixture remaining high connductivity layer mixture being put into the mold
Second layer high connductivity layer mixture；
Then, brush lead is inserted within the mixture in the mold.
4. preparation method as claimed in claim 3, which is characterized in that the first layer high connductivity layer mixing bed of material is total mixing
The 1/4-2/5 of thickness of feed layer.
5. preparation method as claimed in claim 3, which is characterized in that the high lubricant layer mixing bed of material is total mixture thickness
The 1/5-1/2 of degree.
6. preparation method as claimed in claim 3, which is characterized in that the second layer high connductivity layer mixing bed of material is total mixing
The 1/4-2/5 of thickness of feed layer.
7. preparation method as claimed in claim 3, which is characterized in that the plug wire depth of the brush lead is in the mold
The 1/2-4/5 of total mixing thickness of feed layer.
8. preparation method as described in claim 1, which is characterized in that the treatment temperature of the sintering processes is 500-800 DEG C,
Processing time is 8.5-27h.
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