CN106299967B - A kind of preparation method of inverted trapezoidal seat motor carbon brush - Google Patents
A kind of preparation method of inverted trapezoidal seat motor carbon brush Download PDFInfo
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- CN106299967B CN106299967B CN201510255852.XA CN201510255852A CN106299967B CN 106299967 B CN106299967 B CN 106299967B CN 201510255852 A CN201510255852 A CN 201510255852A CN 106299967 B CN106299967 B CN 106299967B
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Abstract
The present invention provides a kind of preparation methods of inverted trapezoidal seat motor carbon brush, including：Electrolytic copper powder, natural 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, natural graphite, phenol-formaldehyde resin powder and mix lubricant containing methenamine；High connductivity layer mixture and high lubricant layer mixture are added sequentially to carry out compression process in the mold that its section is inverted trapezoidal, carbon brush green compact is made；Carbon brush green compact is sintered and finished product working process, its obtained section are the carbon brush of inverted trapezoidal.Seat motor of the present invention is compound using high connductivity layer and high lubricant layer with carbon brush, and has peculiar shape, and what it is in close commutator is the cambered surface being bent on one side, 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 seat motor carbon brush, and in particular to its a kind of section is the seat of inverted trapezoidal
The preparation method of chair carbon brush used for electric engine belongs to electrical carbon field.
Background technology
As car is in the universal of modern society, people are also higher and higher to the various requirement of car.Have in car inner
Various motors facilitate operation of the user to each system of car.By taking seat system as an example, the lifting of seat, front and back shifting
Dynamic, hue angle is all driven by motor.Such motor generally uses 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.
Seat motor used at present with carbon brush generally use copper powder, graphite powder and binder molding fine copper soft whipping wire at
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 makes every effort to reduce carbon brush and change based on seat motor to the rigors of noise
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, one kind be high lubricant layer, one kind be 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 inverted trapezoidal seat electricity
The preparation method of machine carbon brush, the present invention are made by by high lubricant layer and high connductivity layer compound suppressing and being ground out special cambered surface
The carbon brush of standby low pressure drop, low noise reaches increase lubrication, reduces spark, improve the purpose of Service Life of Carbon Brush.
The present invention provides a kind of preparation methods of inverted trapezoidal seat motor carbon brush, include the following steps：
Electrolytic copper powder, natural graphite and phenol-formaldehyde resin powder are uniformly mixed, high connductivity layer mixture is made；
Electrolytic copper powder, natural 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 sequentially in the mold that its section is inverted trapezoidal,
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；
Carbon brush finished product working process 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, natural graphite 40-
The sum of parts by weight of 70, phenol-formaldehyde resin powder 20-40, the electrolytic copper powder and natural graphite are 100 parts.
In particular, 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 natural graphite are 100 parts.
Especially, the copper content of the electrolytic copper powder is >=99%, and granularity is -300 mesh, and pine dress is than being 0.8-1.9g/
cm3。
In particular, the natural graphite is black scale like powder, 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, natural graphite 50-
90, lubricant 2-6, phenol-formaldehyde resin powder 20-40, the electrolytic copper powder, natural graphite and lubricant the sum of parts by weight be 100
Part.
In particular, 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, natural 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 is than being 0.8-1.9g/
cm3。
In particular, the natural graphite is black scale like powder, 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.
In particular, 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 increase the intensity of carbon brush, protects
Carbon brush is demonstrate,proved while improving lubricity without reducing intensity.
In particular, the molybdenum disulfide is grey black solid powder, 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.
In particular, the liquid phenolic resin is 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, to drop
The noise of low-carbon brush and 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, 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 liquid phenolic resin is added 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.
In particular, crushing processing 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.
In particular, 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 sequentially to the mould that its section is inverted trapezoidal
Tool includes：
First the high connductivity layer mixture is put into the mold；
The high lubricant layer mixture is put on the high connductivity layer mixture in the mold again；
Then, by copper soft whipping wire via high lubricant layer mixture in the mold be inserted into the high connductivity layer mixture it
It is interior；
Then in inverted trapezoidal mold high lubricant layer mixture and high connductivity layer mixture suppress, form its section
The bed of material is mixed for the high lubricant layer mixing bed of material and high connductivity layer of inverted trapezoidal.
In particular, the high connductivity layer mixing bed of material is the 1/2-4/5 of total mixture thickness.
Especially, the high lubricant layer mixing bed of material is the 1/5-1/2 of total mixture thickness.
In particular, the plug wire depth of the copper soft whipping wire is the 1/2-4/5 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 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.
In particular, 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.
In particular, 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 50-90%:10-50%.
Wherein, carbon brush finished product working process is carried out to the carbon brush first product, obtains carbon brush finished product.
Carbon brush finished product working process of the present invention includes carrying out thickness and radian working process to the carbon brush first product, is made
Carbon brush finished product obtained close to commutator is inclined cambered surface on one side, be always ensured that high lubricant layer front end is prominent and commutator
Contact, and high connductivity layer does not contact commutator, and so that carbon brush contact with commutator from face becomes line and contact, and reduces carbon brush and commutates
Friction between device reduces noise.
Advantages of the present invention and advantageous effects are as follows：
1, the preparation method of inverted trapezoidal seat motor carbon brush of the present invention is compound using high connductivity layer and high lubricant layer, and height is led
Different material formula is respectively adopted in electric layer and high lubricant layer, and high connductivity layer resistivity of material is low, conducts electricity very well, high lubricant layer material
Expect friction coefficient it is low, greasy property is good, and noise is small, two layers it is compound after achieve the purpose that low pressure drop, low noise.
2, the lubricant in the high lubricant layer of inverted trapezoidal seat motor carbon brush of the present invention uses the graphite powder of particular size
It cooperates with and lubricates with molybdenum disulfide, good lubricant effect can be reached, improve the greasy property of high lubricant layer, reduce and commutate
The friction of device.
3, methenamine, Wu Luotuo are added in the lubricant in the high lubricant layer of inverted trapezoidal seat motor carbon brush of the present invention
Product are a kind of preferable resinae curing agent, and the addition of methenamine can increase the intensity of material, avoid conventional carbon brush production
The defect that 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 lubrication
Degree increases the carbon brush service life.
4, inverted trapezoidal seat motor of the present invention has peculiar shape with carbon brush, and what it is in close commutator is the arc being bent on one side
Face can be always ensured that high lubricant layer front end is protruded and be contacted with commutator, and high connductivity layer does not contact commutator, makes carbon brush and commutation
Device becomes line contact from face contact, reduces the friction between carbon brush and commutator, reduces noise.
5, inverted trapezoidal 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 inverted trapezoidal seat motor carbon brush of the present invention；
Fig. 2 is the vertical view of inverted trapezoidal seat motor carbon brush of the present invention.
Reference sign：
1, high connductivity layer；2, high lubricant layer；3, copper soft whipping wire.
Specific implementation mode
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 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
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
1, high connductivity layer mixture is prepared
It is electrolytic copper powder 50 according to weight, natural graphite 50, phenol-formaldehyde resin powder 25 gets out raw material, then will be electric
Solution copper powder, natural 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.
2, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 45, molybdenum disulfide 48, methenamine 7, the preparation of liquid phenolic resin 30 according to weight
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, natural graphite 55, lubricant 2, phenol-formaldehyde resin powder 30 gets out original
Electrolytic copper powder, natural 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, natural graphite that step (2) mixed and
In phenol-formaldehyde resin powder, it is stirred 70min, high lubricant layer mixture is made.
3, compression process
First prepared high connductivity layer mixture is put into mold, then prepared high lubricant layer mixture is put into institute
It states on the high connductivity layer mixture in mold, is then inserted into copper soft whipping wire via high lubricant layer mixture in mold high
Within conductive layer mixture；Wherein, high connductivity layer is the 7/10 of total mixture thickness, and high lubricant layer is the 3/ of total mixture thickness
10, the plug wire depth of copper soft whipping wire is the 3/5 of total thickness of feed layer；The mixture in mold is carried out at compacting using press device
Carbon brush green compact, the wherein 3 tons/cm of unit pressure of compression process is made in reason2。
4, sintering processes
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%: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.
5, finished product working process
To carbon brush first product carry out thickness and radian working process to get；As shown in Figure 1, 2, carbon brush produced by the present invention with
The side of commutator contact is to tilt cambered surface, and the section of carbon brush is inverted trapezoidal, the handing-over line of the cambered surface and high lubricant layer top surface
It is contacted with commutator.
Embodiment 2
1, high connductivity layer mixture is prepared
It is electrolytic copper powder 45 according to weight, natural graphite 55, phenol-formaldehyde resin powder 30 gets out raw material, then will be electric
Solution copper powder, natural 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.
2, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 35, molybdenum disulfide 55, methenamine 10, the preparation of liquid phenolic resin 20 according to weight
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, natural graphite 50, lubricant 5, phenol-formaldehyde resin powder 35 gets out original
Electrolytic copper powder, natural 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, natural graphite that step (2) mixed and
In phenol-formaldehyde resin powder, it is stirred 90min, high lubricant layer mixture is made.
3, compression process
First prepared high connductivity layer mixture is put into mold, then prepared high lubricant layer mixture is put into mould
On high connductivity layer mixture in tool, copper soft whipping wire is then inserted into high connductivity layer via high lubricant layer mixture in mold and is mixed
It closes within material；Wherein, high connductivity layer is the 3/5 of total mixture thickness, and high lubricant layer is the 2/5 of total mixture thickness, the soft strand of copper
The plug wire depth of line is the 3/4 of total thickness of feed layer；Compression process is carried out to the mixture in mold using press device, carbon is made
Brush green compact, the wherein 4 tons/cm of unit pressure of compression process2。
4, sintering processes
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 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.
5, finished product working process
To carbon brush first product carry out thickness and radian working process to get；As shown in Figure 1, 2, carbon brush produced by the present invention with
The side of commutator contact is to tilt cambered surface, and the section of carbon brush is inverted trapezoidal, the handing-over line of the cambered surface and high lubricant layer top surface
It is contacted with commutator.
Embodiment 3
1, high connductivity layer mixture is prepared
It is electrolytic copper powder 55 according to weight, natural graphite 45, phenol-formaldehyde resin powder 40 gets out raw material, then will be electric
Solution copper powder, natural 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.
2, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 40, molybdenum disulfide 54, methenamine 6, the preparation of liquid phenolic resin 25 according to weight
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, natural graphite 89, lubricant 6, phenol-formaldehyde resin powder 20 gets out original
Electrolytic copper powder, natural 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, natural graphite that step (2) mixed and
In phenol-formaldehyde resin powder, it is stirred 120min, high lubricant layer mixture is made.
3, compression process
First prepared high connductivity layer mixture is put into mold, then prepared high lubricant layer mixture is put into institute
It states on the high connductivity layer mixture in mold, is then inserted into copper soft whipping wire via high lubricant layer mixture in mold high
Within conductive layer mixture；Wherein, high connductivity layer is the 4/5 of total mixture thickness, and high lubricant layer is the 1/ of total mixture thickness
5, the plug wire depth of copper soft whipping wire is the 7/10 of total thickness of feed layer；The mixture in mold is carried out at compacting using press device
Carbon brush green compact, the wherein 5 tons/cm of unit pressure of compression process is made in reason2。
4, sintering processes
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 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.
5, finished product working process
To carbon brush first product carry out thickness and radian working process to get；As shown in Figure 1, 2, carbon brush produced by the present invention with
The side of commutator contact is to tilt cambered surface, and the section of carbon brush is inverted trapezoidal, the handing-over line of the cambered surface and high lubricant layer top surface
It is contacted with commutator.
Embodiment 4
1, high connductivity layer mixture is prepared
It is electrolytic copper powder 30 according to weight, natural graphite 70, phenol-formaldehyde resin powder 20 gets out raw material, then will be electric
Solution copper powder, natural 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.
2, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 55, molybdenum disulfide 35, methenamine 10, the preparation of liquid phenolic resin 35 according to weight
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, natural graphite 66, lubricant 4, phenol-formaldehyde resin powder 40 gets out original
Electrolytic copper powder, natural 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, natural graphite that step (2) mixed and
In phenol-formaldehyde resin powder, it is stirred 40min, high lubricant layer mixture is made.
3, compression process
First prepared high connductivity layer mixture is put into mold, then prepared high lubricant layer mixture is put into mould
On high connductivity layer mixture in tool, copper soft whipping wire is then inserted into high connductivity layer via high lubricant layer mixture in mold and is mixed
It closes within material；Wherein, high connductivity layer is the 1/2 of total mixture thickness, and high lubricant layer is the 1/2 of total mixture thickness, the soft strand of copper
The plug wire depth of line is the 4/5 of total thickness of feed layer；Compression process is carried out to the mixture in mold using press device, carbon is made
Brush green compact, the wherein 2 tons/cm of unit pressure of compression process2。
4, sintering processes
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 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.
5, finished product working process
To carbon brush first product carry out thickness and radian working process to get；As shown in Figure 1, 2, carbon brush produced by the present invention with
The side of commutator contact is to tilt cambered surface, and the section of carbon brush is inverted trapezoidal, the handing-over line of the cambered surface and high lubricant layer top surface
It is contacted with commutator.
Embodiment 5
1, high connductivity layer mixture is prepared
It is electrolytic copper powder 60 according to weight, natural graphite 40, phenol-formaldehyde resin powder 35 gets out raw material, then will be electric
Solution copper powder, natural 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.
2, high lubricant layer mixture is prepared
(1) lubricant is prepared
It is natural graphite powder 50, molybdenum disulfide 45, methenamine 5, the preparation of liquid phenolic resin 40 according to weight
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, natural graphite 90, lubricant 3, phenol-formaldehyde resin powder 25 gets out original
Electrolytic copper powder, natural 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, natural graphite that step (2) mixed and
In phenol-formaldehyde resin powder, it is stirred 10min, high lubricant layer mixture is made.
3, compression process
First prepared high connductivity layer mixture is put into mold, then prepared high lubricant layer mixture is put into mould
On high connductivity layer mixture in tool, copper soft whipping wire is then inserted into high connductivity layer via high lubricant layer mixture in mold and is mixed
It closes within material；Wherein, high connductivity layer is the 3/4 of total mixture thickness, and high lubricant layer is the 1/4 of total mixture thickness, the soft strand of copper
The plug wire depth of line is the 1/2 of total thickness of feed layer；Compression process is carried out to the mixture in mold using press device, carbon is made
Brush green compact, the wherein 3.5 tons/cm of unit pressure of compression process2。
4, sintering processes
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 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.
5, finished product working process
To carbon brush first product carry out thickness and radian working process to get；As shown in Figure 1, 2, carbon brush produced by the present invention with
The side of commutator contact is to tilt cambered surface, and the section of carbon brush is inverted trapezoidal, the handing-over line of the cambered surface and high lubricant layer top surface
It is contacted 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 inverted trapezoidal seat motor carbon brush, which is characterized in that include the following steps：
Electrolytic copper powder, natural graphite and phenol-formaldehyde resin powder are uniformly mixed, seat motor high connductivity layer mixture is made；
Electrolytic copper powder, natural 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 sequentially in the mold that its section is inverted trapezoidal, to it
Compression process is carried out, seat motor carbon brush green compact is made；
The carbon brush green compact is sintered, seat motor carbon brush first product is made；
Carbon brush finished product working process is carried out to the carbon brush first product, obtains the seat motor carbon brush finished product that section is inverted trapezoidal；
Wherein, the weight of each raw material of high connductivity layer mixture is：Electrolytic copper powder 30-60, natural graphite 40-70,
The sum of parts by weight of phenol-formaldehyde resin powder 20-40, the electrolytic copper powder and natural graphite are 100 parts；
Wherein, the weight of high each raw material of lubricant layer mixture is：Electrolytic copper powder 5-45, natural graphite 50-90, profit
Lubrication prescription 2-6, phenol-formaldehyde resin powder 20-40, the electrolytic copper powder, natural graphite and lubricant the sum of parts by weight be 100 parts；
Wherein, other raw materials of the lubricant include natural graphite, molybdenum disulfide and liquid phenolic resin, with methenamine
Weight be：Methenamine 5-10, natural 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 in the lubricant, the methenamine with it is other
The weight of raw material is：Methenamine 5-10, other raw material 90-150.
3. preparation method as described in claim 1, which is characterized in that it is described be made high lubricant layer mixture include：
At normal temperatures, natural 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, natural graphite and phenol-formaldehyde resin powder, stirring
Uniformly, high lubricant layer mixture is made.
4. preparation method as described in claim 1, which is characterized in that mix the high connductivity layer mixture and high lubricant layer
Conjunction material is added sequentially to the mold that its section is inverted trapezoidal：
First the high connductivity layer mixture is put into the mold；
The high lubricant layer mixture is put on the high connductivity layer mixture in the mold again；
Then, copper soft whipping wire is inserted into via high lubricant layer mixture in the mold within the high connductivity layer mixture；
Then to the high connductivity layer mixture and high lubricant layer mixture progress compression process in the inverted trapezoidal mold, it is formed
Section is the high connductivity layer mixture of inverted trapezoidal and the high lubricant layer mixing bed of material.
5. preparation method as claimed in claim 4, which is characterized in that the high connductivity layer mixing bed of material is total mixture thickness
The 1/2-4/5 of degree.
6. preparation method as claimed in claim 4, which is characterized in that the high lubricant layer mixing bed of material is total mixture thickness
The 1/5-1/2 of degree.
7. preparation method as claimed in claim 4, which is characterized in that the plug wire depth of the copper soft whipping wire 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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