CN101120121A - Method of electrodepositing hub - Google Patents

Method of electrodepositing hub Download PDF

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Publication number
CN101120121A
CN101120121A CNA2005800481871A CN200580048187A CN101120121A CN 101120121 A CN101120121 A CN 101120121A CN A2005800481871 A CNA2005800481871 A CN A2005800481871A CN 200580048187 A CN200580048187 A CN 200580048187A CN 101120121 A CN101120121 A CN 101120121A
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CN
China
Prior art keywords
coating
cylindrical portion
applying liquid
wheel hub
galvanic deposit
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CNA2005800481871A
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Chinese (zh)
Inventor
河村胜行
井上善雅
远藤悟
奥野浩志
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NSK Ltd
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NSK Ltd
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Publication of CN101120121A publication Critical patent/CN101120121A/en
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Abstract

A method of electrodepositing a hub capable of easily performing, without using a masking tape, an operation to accurately form a coating film (31) only on a coated part (a8) partly formed on the surface of a hub body (13a). The upper end face of a rubber bottomed cylindrical masking cover (32) is elastically pressed against the outer end face of a cylindrical part (16) forming the hub body (13a) so that a boundary portion between the coated part (a8) and the portion of the hub body adjacent to the coated part (a8) can be brought into a liquidtight state. In this state, paint particles are electrodeposited on the coated part (a8) by bringing a paint liquid (28) discharged from a liquid supply tube (29) into contact with the coated part (a8).

Description

The method that galvanic deposit applies on wheel hub
Technical field
The present invention relates to the method that galvanic deposit applies on wheel hub, this method is used for forming the antirust coating film on the surface that is located at the round shape part on the outboard end section that constitutes the unitary wheel hub of wheel supporting hub.
Background technology
In structure for example shown in Figure 25, wheel 1 and rotator 2 are rotatably supported on the steering knuckle 3 that constitutes suspension system, and wheel 1 constitutes a wheel, and rotator 2 constitutes disc brake, and this disc brake is the braking rotating element as drift stop.Just, constituting an outer shroud 6 of taking turns supporting hub unit 5 is fixed in the circular support holes 4 that is located in the steering knuckle 3 by a plurality of bolts 7.Simultaneously, wheel 1 is connected with nut 10 by a plurality of stud bolts 9 with rotor 2 and is fixed to and constitutes on the wheel hub 8 of taking turns supporting hub unit 5.
On the inner circumferential surface of outer shroud 6, be provided with double outer- race ball track 11a and 11b, and on external peripheral surface, be provided with mounting flange 12.By mounting flange 12 being fixed on the steering knuckle 3, this outer shroud 6 is fixed on the steering knuckle 3 with corresponding bolts 7.
Simultaneously, wheel hub 8 is provided with a hub body 13 and interior ring 14.On the external peripheral surface part of hub body 13, be provided with a mounting flange 15 from the outstanding part of the outboard end opening of outer shroud 6.(" the axially outside " is meant the downside among each figure beyond Fig. 5,25,26, and be the left side in Figure 25,26, when this " outside " refers on being assemblied in automobile along the outside of vehicle-width direction; In addition, " axially inboard " is meant the upside among each figure beyond Fig. 5,25,26, and be the right side in Figure 25,26, when this " inboard " refers on being assemblied in automobile along the medial side of vehicle-width direction.This also is suitable in whole specification sheets of the present invention and claims.) in addition, the cylindrical portion 16 that is called leader is located at the outer end portion of hub body 13, so that concentric with hub body 13.By being assemblied on the cylindrical portion 16 and the wheel of radially placing 1 is connected with nut 10 by corresponding stud bolt 9 with rotator 2 and is fixed on the outside surface of mounting flange 15.
In addition, with the relative inner race 17a of outer-race ball track 11a on the outside of double outer- race ball track 11a, 11b, be located on the stage casing of external peripheral surface of hub body 13, and the step part 18 of minor diameter is located at the inner section of hub body 13.Interior ring 14 installs on the step part 18 of minor diameter.With the relative inner race 17b of outer-race ball track 11b on the inboard of double outer- race ball track 11a, 11b, be located on the external peripheral surface of interior ring 14.Should in ring 14 be fixed on the hub body 13 by a crimping portion 19, crimping portion 19 forms by the outside viscous deformation of medial extremity section that radially makes hub body 13.A plurality of rolling bodys 20 are located at respectively between separately outer-race ball track 11a, the 11b and separately inner race 17a, 17b rotationally.Among the embodiment shown in the figure, the inner race 17a in the outside is directly arranged in the stage casing of the external peripheral surface of hub body 13, but, the inner race 17a in the outside also can be located on the outer round surface of the interior ring 14a that separates in the stage casing that is contained in hub body 13, as among Figure 25 with shown in the two point chain line (dotted line).In addition, in the example shown in the figure, ball still, is used at hub also can using taper roller under the situation of heavy-duty car as each rolling body 20.In addition, established therein each rolling body 20, cylindrical space openings at two ends part seals by wear ring 21a, 21b respectively.
In addition, in the example shown in the figure, because wheel support cage unit 5 is used as driving wheel (all of the trailing wheel of the front-wheel of FF car, FR/RR car or 4WD car are taken turns), a splined hole 22 is located at the central sections of wheel hub 8.The lip-deep splined shaft 24 of outboard end that is fixed on constant velocity cardan joint outer shroud 23 is inserted in the splined hole 22.Meanwhile, also further tighten it, hub body 13 is fixed between nut 25 and the constant velocity cardan joint outer shroud 23 tightly by the fore-end that a nut 25 is screwed in splined shaft 24.
Then, Figure 26 illustrates common known unitary second example of support cage of taking turns that is used for driving wheel (front-wheel of the trailing wheel of FF car, FR/RR car).Because the wheel support cage unit 5a of this second example is used for driving wheel, splined hole is not provided in a side of the stage casing of the hub body 13a that constitutes wheel hub 8a.In addition, in situation at this example, the inner race 17a in the outside is directly arranged on the stage casing of external peripheral surface of hub body 13a, and still, the inner race 17a in the outside also can be located on the external peripheral surface of one on the stage casing that is contained in hub body 13a interior ring (not shown) of separating.In addition, in the example shown in the figure, in ring 14 internal end surface be arranged on crimping portion 19 clampings on the medial extremity section of hub body 13a, still, the medial extremity surface of interior ring 14 also can be screwed in the lip-deep nut clamping of medial extremity of hub body 13a.Under this situation, the medial extremity section that external thread section is located at hub body 13a is used for fastening nut.The situation of other structure of other parts and effect and above-mentioned first example is similar.
In addition, under above-mentioned situation of taking turns support cage unit 5,5a, coating be located at be used at least a portion on surface of the cylindrical portion 16 among hub body 13, the 13a antirust etc.According to the purpose of coating, form the specified range (" desirable scope ") of the coated surface of coating, with the dotted line α that for example is used for Figure 27 (A)-27 (H) 1-α 8Shown difference.In addition, as the method that on the surface that will be coated with, forms coating, the whole bag of tricks, for example spread coating or galvanic deposit coating method be known (for example, referring to patent document 1 and 2, more particularly, Japanese Patent Application Publication No.2003-136902 and Japanese Patent Application Publication No.2003-342793).In these methods, compare with the use of other method, it is preferred making Means of Electrodeposition, not only because this method can be formed uniformly shallow layer on the surface that will apply, and can shorten the dry required time when the coating on the baking coated surface.
Figure 28 is illustrated in disclosed galvanic deposit coating method in the patent document 2.Under the situation of this example, the surface that apply is with dashed lines α among Figure 28 and 27 (A) 1Shown part that is to say, constitutes the external peripheral surface of half part cylindrical portion 16, the outside of hub body 13, the partly inner circumferential surface and the outboard end surface of part in the outside.When at such surface (α that will apply 1) go up when forming coating, at first, at the surface (α that this will apply 1) on carry out pre-treatment as oil removing and so on.Then, as shown in figure 28, electrode 30a on the end face that is fixed on support plinth 26 is contacted with hub body 13 and constituting under the situation of outer surface by not shown support plinth supporting of mounting flange 15 of this hub body 13, the outside of cylindrical portion 16 half part is immersed in the applying liquid 28 that is full of applying liquid container 27.Therefore, applying liquid 28 and the whole surface (α that will apply 1) contact.By continuously applying liquid 28 being infeeded in the applying liquid container 27 by feed pipe 29, while make applying liquid 28 overflow the dip-coating operation of carrying out at this moment from the tip edge of applying liquid container 27.The reason of carrying out dip-coating by this way is to keep the position of fluid surface of applying liquid 28 and the coating scope of suitably regulating cylindrical portion 16.
In case applying liquid 28 and the above-mentioned whole surface (α that will apply 1) contact, then under this situation, then voltage be added to the electrode 30b that is immersed in the applying liquid 28 and and hub body 13 electrodes in contact 30a between (for example, electrode 30b is connected with positive pole, and electrode 30a is connected with negative pole).As a result, the surface (α by making the coating particles ionization in the applying liquid 28 and will applying ionized coating particles galvanic deposit 1) on, and the surface (α that will apply 1) the undried coating 31 of last formation.Then, from applying liquid 28, take out cylindrical portion 16, heat this undried coating 31 with drying it, thus coating 31 is baked to the surface (α that will apply 1) on.At last, cooling coating 31 applies operation and finishes.In the example shown in the figure, though represent coating 31 with thick line for convenience,, the width of thick line is not represented the thickness of coating 31.According to the time span that above-mentioned voltage has applied, in case coating is toasted, then the actual (real) thickness of coating 31 for example is about several μ m.This thickness is identical with following other ordinary method and embodiments of the invention.
As mentioned above, under the situation of common electrical deposition coating method shown in Figure 28, as the method that the surface that will apply is contacted with applying liquid 28, use the part of hub body 13 is immersed in method in the applying liquid 28 that is full of applying liquid container 27 simply.In so common galvanic deposit coating method, when the part of hub body 13 is immersed in the applying liquid 28, become on the whole surface of the part of being soaked under the situation on the surface that will apply (for example, as in Figure 27 (A) and Figure 28 by dotted line α 1Shown in like that, this surface that will apply is on the internal and external circumference surface of cylindrical portion 16, up to forming under the situation of coating 31 till the axial same position), will not have special problem.But, become under the situation on the surface that will apply in the part on the surface of dipping part only (in for example, as Figure 27 (B)-(H) by dotted line α 2-α 8Shown in like that, this surface that will apply is on the internal and external circumference surface of cylindrical portion 16, the axial location of the end parts of coating 31 is not mutually not simultaneously) owing to be not that the part on the surface that will apply also contacts with applying liquid 28, so the coating scope can not suitably be regulated.In this case, if a Masking strip is installed to the surface portion that does not apply, the surface that only will apply is contacted, still with applying liquid 28, because therefore the operation that will install and remove Masking strip before and after dip operation makes to apply and operates some trouble that becomes.
In addition, in the outboard end that is coated in external peripheral surface in the hub body 13, cylindrical portion 16 by galvanic deposit to middle portion, outboard end surface and inner circumferential surface, and part (with dashed lines α in the outboard end surface of hub body 13, around being surrounded by cylindrical portion 16 6The part that illustrates) go up under the situation that forms coating, at first, at dotted line α 6Shown part is carried out the processing as oil removing and so on.
Then, use coating unit 46 for example shown in Figure 30, carry out the electrocoating paint particle at dotted line α 6Operation on the shown part (forming the operation of undried coating 54).Coating unit 46 is provided with: applying liquid container 48, a recycling bin 49 and a nozzle 52, and wherein applying liquid container 48 is equipped with applying liquid 47 and on the top opening is arranged; Recycling bin 49 is set as around applying liquid container 48, to collect the applying liquid 47 that overflows from the tip edge of applying liquid container 48, and that nozzle 52 is set as liquid vertically is close and pass the middle body of the respective base part 50,51 that constitutes applying liquid container 48 and recycling bin 49 airtightly, and the effect by the pump (not shown), the top end opening ejection of applying liquid 47 from nozzle.At the top end part of this nozzle 52, be provided with the targeting part 53 that its whole top end part radially bends outwards into U-shaped.In addition, the tip edge of nozzle 52 is arranged to the surface that is higher than the applying liquid 47 that is contained in the applying liquid container 48.
As shown in the figure, use coating unit 46 (as shown in the figure) the coating particles galvanic deposit at dotted line α 6Shown in the part on situation under, the outboard end of cylindrical portion 16 is immersed in the applying liquid 47 that is contained in applying liquid container 48 to the middle part.Simultaneously, make the part on the whole outboard end surface of passing hub body 13a relatively of the outside surface of the targeting part 53 on the top end part that is located at nozzle 52 and the inner circumferential surface of cylindrical portion 16, the circumference of the outboard end surface portion of hub body 13a is encased by cylindrical portion 16.In this case, by applying liquid 47 from the upwards spray of the top end opening of nozzle 52, make the applying liquid 47 of injection flow through gap portion between the above-mentioned mutual facing surfaces, its state is this clearance portion applying liquid 47 fully abrim.So, this applying liquid 47 is contacted respectively with the whole portion on the outboard end surface of wheel hub 13a, encased by cylindrical portion 16 around this part, and contact with the whole inner circumferential surface of cylindrical portion 16.So, with dashed lines α 6Shown whole portion contacts with applying liquid 47.
In addition, the aforesaid applying liquid 47 that sprays from the top end opening of nozzle 52 injects the inside of applying liquid container 48.Subsequently, the applying liquid 47 that is filled in the applying liquid container 48 overflows the amount of having injected to the outside from the tip edge of applying liquid container 48.The applying liquid 47 that so overflows is recovered bucket 49 and reclaims, and the applying liquid 47 that sprays as the top end opening from nozzle 52 again.
In case with dashed lines α 6Shown whole portion contacts (as mentioned above) with applying liquid 47, then subsequently, under this state, voltage be added to and another part electrodes in contact (not shown) of applying liquid 47 and hub body 13a between (for example, the electrode side is connected with anodal, and hub body is connected with negative pole).As a result, arrive dotted line α by the coating particles in the ionization applying liquid 47 and with these Ionized coating particles galvanic deposit 6On the shown part, on this part, form undried coating 54.In case undried coating 54 has been formed as described above, by heating this undried coating 54 with dry it, coating 54 bakings on above-mentioned surface, are operated to finish to apply with postcooling coating 54.
Carrying out the coating particles galvanic deposit at dotted line α with a step as mentioned above 6Under the situation on the shown part, liquid stream according to the applying liquid 47 that sprays and inject applying liquid container 48 from nozzle 52 top end openings, at the radial outside of cylindrical portion 16, produce fluctuation on the surface of the applying liquid 47 in being filled in this applying liquid container 48.Its result, the above-mentioned fluctuation of range response of the applying liquid 47 that contacts with the external peripheral surface of cylindrical portion 16 is moved and is changed, when when the radial outside of cylindrical portion 16 is seen, the edge shape that will be formed on the coating 54 on the external peripheral surface of this cylindrical portion 16 does not become straight line, and becoming corrugatedly, coating 54 can not be precisely defined on the part that will form coating 54.
In addition, in the method that applies with galvanic deposit coating is formed under the lip-deep situation of the cylindrical portion 16 that constitutes hub body 13,13a, voltage be applied to another part electrodes in contact of applying liquid and with another electrode that hub body 13,13a contact between, and the surface of cylindrical portion 16 contacts with applying liquid.So, by the coating particles in the ionization applying liquid and these Ionized coating particles galvanic deposit on this surface, on the surface of cylindrical portion 16, form undried coating with this.
By the way, when toasting coating on the surface of cylindrical portion 16 as mentioned above, heat this undried coating inadequately and can cause following problem.Particularly, whole periphery by the high frequency hardening treatment being applied to this part is to improve the hardness of this part, the at least a portion in stage casing that a hardened layer is formed on hub body 13,13a is near the part of the medial extremity of the external peripheral surface of hub body 13,13a (for example, the part of ring 14,14a in the bottom branch of flange 15, the part that forms inner race 17a and the joint) on.Therefore, making under the undue situation that rises of temperature of hardened layer owing to the not dried coating of heating inadequately, ruckbildung (as annealing or tempering) will take place on this hardened layer, cause occurring the problem of this hardened layer hardness reduction.In addition, heating under the state of assembly wheel support cage unit 5,5a under the situation of dry coating not, if excessively raise owing to heating the greasy temperature that installation portion branch that this undried coating makes corresponding rolling body 20 comprises inadequately, the problem of grease deterioration then will occur.
Patent document above-mentioned is:
Patent document 1: Japanese Patent Application Publication No.2003-136902.
Patent document 2: Japanese Patent Application Publication No.2003-342793.
Summary of the invention
Consider the problems referred to above, invented method, with the operation easily in the desirable scope that realizes not using Masking strip coating to be formed on hub surface according to the coating of galvanic deposit on wheel hub of first aspect present invention.
In addition, consider the problems referred to above, invented the method that applies according to the galvanic deposit on wheel hub of second aspect present invention, coating is precisely defined at method in the desirable scope on the surface that comprises the cylindrical portion at least in the hub surface to realize allowing.
In addition, consider the problems referred to above, invented method according to the coating of galvanic deposit on wheel hub of third aspect present invention and fourth aspect, with the method that is achieved as follows, promptly, coating is baked under the lip-deep situation of cylindrical portion that constitutes wheel hub, can prevent the too high rising of temperature on the part that forms hardened layer by the high frequency hardening treatment in the wheel hub external peripheral surface, or the greasy temperature that is included in the rolling body mounting portion too raises in the undried coating of heating.
The method that the galvanic deposit on wheel hub of a first aspect of the present invention applies, desirable scope with the coating of being used to form, this scope comprises the part on the surface of cylindrical portion at least in the surface that constitutes the unitary wheel hub of wheel support cage, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler, in order on this desirable scope, to form coating, make under applying liquid and this desirable scope state of contact, make coating particles galvanic deposit in the applying liquid on this desirable scope.
In the method that the galvanic deposit on wheel hub according to first aspect present invention applies, desirable scope in sheltering cover and above-mentioned hub surface with contact with the boundary member of the scope of contiguous this desirable scope or tight relative situation under, on desirable scope, carry out the electrocoating paint particulate and operate.
Make and shelter relative gap under cover and the approaching relative situation of described boundary member described, for a short time, (preferably be not more than 1mm to the degree that can carry out machine adjustments, more preferably be not more than 0.5mm), even thereby applying liquid spills from the gap that is created on this relative part, spillage also is very small.
In addition, the method that the galvanic deposit on wheel hub of first aspect present invention applies may be implemented in the wheel hub (one hub body) before the assembly wheel support cage unit, but this method also can be implemented on and assembled the wheel hub of taking turns under the unitary state of support cage.
In the method that the galvanic deposit on wheel hub according to second aspect present invention applies, desirable scope with the coating of being used to form, this scope comprises the surface of cylindrical portion at least in the surface that constitutes the unitary wheel hub of wheel support cage, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler, in order on this desirable scope, to form coating, the desirable scope of applying liquid and this is contacted, simultaneously, with the coating particles galvanic deposit in this applying liquid on desirable scope.
In the method that the galvanic deposit on wheel hub according to second aspect present invention applies, set a plurality of minutes scopes that become a part of scope in the desired scope respectively, and the operation of galvanic deposit coating particles on desirable scope is to carry out with the operation of separating in each minute scope.
In addition, under the situation of setting a plurality of minutes scopes, as long as all branch scopes cover whole desirable scope together, then the coincidence scope between each minute scope can not throw into question.
In addition, the method that the galvanic deposit on wheel hub of a second aspect of the present invention applies may be implemented in the wheel hub (one hub body) before the assembly wheel support cage unit, but this method also can be implemented on and has been assembled into the wheel hub of taking turns under the unitary state of support cage.
In the method that the galvanic deposit on wheel hub aspect the present invention third and fourth applies, in the surface that constitutes the unitary wheel hub of wheel support cage, galvanic deposit coating particles on the surface of cylindrical portion, on this surface, form undried coating thus, then, coating is baked on the surface of this cylindrical portion so that it is dry by heating this undried coating, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler.
Especially, in the method that the galvanic deposit on wheel hub according to third aspect present invention applies, the Heating temperature of undried coating is lower than 140 ℃.
In addition, in the method that the galvanic deposit on wheel hub according to fourth aspect present invention applies, the Heating temperature of undried coating is at 140-220 ℃, and under the situation of interior distolateral (the interior distolateral part of the above-mentioned cylindrical portion this wheel hub) cooling wheel hub, the operation of heating described undried coating.
In addition, the method that the galvanic deposit on wheel hub of third and fourth aspect of the present invention applies may be implemented in the single hub body before the assembly wheel support cage unit, but this method also can be implemented on and is assembled into the wheel hub of taking turns under the unitary state of support cage.
As mentioned above, first aspect present invention under the situation of the method that galvanic deposit on the wheel hub applies, make the desirable scope of sheltering in cover and the hub surface with contact with the boundary member of the scope of contiguous this desirable scope or tight relative situation under (these two portions are separated from each other), in desirable scope, carry out the electrocoating paint particulate and operate.Therefore, in this operation, can prevent that the applying liquid that contacts with desired scope from contacting with the scope of contiguous this desired scope.Particularly, under situation of the present invention, shelter cover and above-mentioned boundary member contact or closely relative, can be installed to Masking strip nearby sphere and realize the above-mentioned effect that prevents of the present invention by only making.Therefore, according to the present invention, can easily implement only in desirable scope, to form the operation of coating.
As mentioned above, a second aspect of the present invention under the situation of the method that galvanic deposit on the wheel hub applies, because the operation of galvanic deposit coating particles on the desirable scope of hub surface, be in each minute scope, to carry out with the operation of separating, thus each minute scope coating can accurately carry out.Therefore, can accurately carry out the coating of desired scope integral body.
In addition, the method that applies according to the galvanic deposit on wheel hub of third and fourth aspect of the present invention as described above, the heating undried coating with the surface that coating is baked to cylindrical portion on the time, the part of carrying out the high frequency hardening treatment in the external peripheral surface of wheel hub, be that the temperature of hardened layer can excessively not raise (not being elevated to the temperature that annealing or tempered ramollescence take place on hardened layer), and can prevent the greasy excessive temperature of in constituting the unitary rolling body installation portion of wheel support cage, enclosing raise (temperature is not elevated to the temperature of grease deterioration).
More specifically, under the unitary situation of wheel support cage shown in Figure 25 that mentions in the above and 26, adding with stove under the situation of thermosetting hardened layer, tempering temperature is between 150-180 ℃.Therefore, be exposed to time span under the temperature,, then in the needed time span of the undried coating of drying, the ramollescence as annealing and so on can not take place on hardened layer as long as temperature keeps below 150 ℃ according to hardened layer.For example, even hardened layer exposes 30 minutes down at 140 ℃, the ramollescence as tempering and so on does not take place in hardened layer yet.In addition, under the unitary situation of wheel support cage of aforesaid Figure 25 and 26,, the grease temperature that comprises in the rolling body installation portion (changes according to types of fats if reaching the point that drips, but an example is about 260 ℃), then regardless of the time length that exposes, grease is all with deterioration, still, when being elevated to about 120 ℃, no matter the time length that exposes, grease is deterioration not, and in the time of about 140 ℃, (for example be not more than 30 minutes) in the desirable time span of dry coating, grease is deterioration not.
On the other hand, as mentioned above, in the method that the galvanic deposit on wheel hub according to a third aspect of the present invention applies, the Heating temperature of coating is lower than or is not higher than 140 ℃.Therefore, even be sent under the situation of above-mentioned hardened layer at the heat that is applied on the coating, the temperature of hardened layer can excessively not raise yet.In addition, even heat is sent to grease, greasy temperature can not be elevated to the temperature of beginning deterioration yet.
On the other hand, as mentioned above, in the method that the galvanic deposit on wheel hub according to a fourth aspect of the present invention applies, the Heating temperature of dry coating does not rise than higher, in 140 ℃-220 ℃ scope, but, be at the heating operation that in interior distolateral cooling wheel hub, carries out undried coating.As a result, can suppress to raise owing to the heat that is applied to coating makes hardened layer and greasy temperature.Therefore, can prevent to make the hardened layer deliquescing or owing to the over-drastic temperature rise makes the grease deterioration owing to the over-drastic temperature rise.In addition, in the method that the galvanic deposit on wheel hub according to fourth aspect present invention applies,, therefore can shorten the desirable time span of baking coating because the Heating temperature of dry coating does not rise than higher.
Description of drawings
Fig. 1 is so that the contacted state of surface that will apply and applying liquid illustrates the sectional view of the first embodiment of the present invention;
Fig. 2 is the sectional view that the state behind the state of Fig. 1 is shown, and wherein, applying liquid drips from the inside of sheltering cover, and air is blown in the outboard end opening of cylindrical portion;
Fig. 3 is the sectional view that the second embodiment of the present invention is shown;
Fig. 4 is the sectional view that the third embodiment of the present invention is shown;
The top view of sheltering cover that Fig. 5 sees above Fig. 3;
Fig. 6 is the sectional view that is used to explain the problem that occurs when the top end part of sheltering cover is not provided with the dropping liquid passage of otch and so on;
Fig. 7 is the sectional view that the fourth embodiment of the present invention is shown;
Fig. 8 is the sectional view that the fifth embodiment of the present invention is shown;
Fig. 9 is the sectional view that the sixth embodiment of the present invention is shown;
Figure 10 is the sectional view that the seventh embodiment of the present invention is shown;
Figure 11 is the sectional view that the 8th embodiment is shown, and the state of the operation of first process of carrying out the galvanic deposit coating is shown;
Figure 12 is the sectional view that the 8th embodiment is shown, and the state of the operation of second process of carrying out the galvanic deposit coating is shown;
Figure 13 is the sectional view that the ninth embodiment of the present invention is shown, and the state of the operation of first process of carrying out the galvanic deposit coating is shown;
Figure 14 is the sectional view that the ninth embodiment of the present invention is shown, and the state of the operation of second process of carrying out the galvanic deposit coating is shown;
Figure 15 is the sectional view that the tenth embodiment of the present invention is shown, and the state of the operation of first process of carrying out the galvanic deposit coating is shown;
Figure 16 is the sectional view that the tenth embodiment of the present invention is shown, and the state of the operation of second process of carrying out the galvanic deposit coating is shown;
Figure 17 is the sectional view that the 11st embodiment of the present invention is shown, and the state of the operation of first process of carrying out the galvanic deposit coating is shown;
Figure 18 is the sectional view that the 11st embodiment of the present invention is shown, and the state of the operation of second process of carrying out the galvanic deposit coating is shown;
Figure 19 illustrates the 12nd embodiment of the present invention, and the sectional view of the hub body that apply the galvanic deposit coating is shown;
Figure 20 is at the sectional view that has formed the hub body that illustrates under the state of dry coating not on the cylindrical portion surface;
Figure 21 illustrates by heating undried coating coating is baked to the sectional view lip-deep process of cylindrical portion, hub body;
Figure 22 illustrates cooling to have toasted sectional view at the hub body of the process of the lip-deep coating of cylindrical portion;
Figure 23 is illustrated in the 13rd embodiment of the present invention by heating undried coating coating to be baked to the sectional view lip-deep process of cylindrical portion, hub body;
Figure 24 illustrates the sectional view of hub body that cooling has been baked to the process of the lip-deep coating of cylindrical portion;
Figure 25 is the sectional view that the unitary example of wheel support cage that is used for driving wheel under the state that is assembled to steering knuckle is shown;
Figure 26 is the sectional view that expression is used for the unitary example of wheel support cage of follow-up pulley;
Figure 27 is the diagrammatic sketch that the 8th example of the scope that will form coating is shown;
Figure 28 is the sectional view that first example of existing galvanic deposit coating method is shown;
Figure 29 is the sectional view that constitutes the unitary hub body of wheel support cage that is used for follow-up pulley shown in Figure 26;
Figure 30 is the sectional view that second example of existing galvanic deposit coating method is shown.
Embodiment
Will with shelter a cover contact or a closely relative boundary member, under the situation as the peripheral part (neighboring part or inside circumference part) on the outboard end surface of the cylindrical portion that constitutes wheel hub, can carry out the method that the galvanic deposit on wheel hub of a first aspect of the present invention applies.
In addition, be located under the situation of wheel hub central sections in a hole will passing wheel hub vertically, can carry out aforesaid method, wherein will with shelter a cover contact or a closely relative boundary member, be that this part is surrounded by cylindrical portion around a ring segment of the outboard end opening in the above-mentioned hole on wheel hub outboard end surface.
In addition, when carrying out these embodiment of the present invention, radially inner side in the cylindrical portion that constitutes wheel hub is full of under the state of applying liquid, coating particles in this applying liquid galvanic deposit after on the cylindrical portion internal surface, applying liquid drops onto the outside of cylindrical portion by the outboard end opening of cylindrical portion, afterwards, gas (for example air) can be blown in the outboard end opening of this cylindrical portion.
The result, when from cylindrical portion drippage applying liquid, even be formed at the applying liquid film under the situation on the outboard end opening portion of this cylindrical portion, before sheltering the outboard end opening portion of cover from this cylindrical portion and separating, the gas that above-mentioned applying liquid film can be blown in the outboard end opening breaks.Therefore, when separating from the outboard end opening of cylindrical portion when sheltering cover, can prevent because breaking of applying liquid film and around the problem of wheel hub sputter applying liquid.
In addition, when carrying out foregoing invention, can use and shelter cover, this shelters cover whole is cylindrical shape, can will shelter the part liquid of close front end of external peripheral surface of cover thickly on the whole inside circumference part by the outboard end surface that is pressed in the cylindrical portion that constitutes wheel hub, and on the part that enters above-mentioned cylindrical portion inboard in leading section, form the external peripheral surface of this part of connection and the dropping liquid passage of inner circumferential surface.
The result, radially inner side in cylindrical portion is full of under the state of applying liquid, with the coating particles galvanic deposit in the applying liquid on the inner circumferential surface of this cylindrical portion, then, after the outboard end opening of applying liquid by cylindrical portion dropped onto the outside of cylindrical portion, can prevent that applying liquid from accumulating in the gap between the inner circumferential surface of the external peripheral surface of the fore-end of sheltering cover and cylindrical portion.Therefore, can prevent when vertically separating wheel hub and shelter cover and keep cylindrical portion down, accumulate in applying liquid in the gap portion and fall on the object of circumference and splash, be attached to thus on the part beyond the coated part of above-mentioned hub surface.
In addition, when carrying out method a second aspect of the present invention, that galvanic deposit applies on wheel hub, as one in each process, preferably adopt following process, promptly, in the applying liquid in the applying liquid container that cylindrical portion is immersed in be housed in upper opening, simultaneously, galvanic deposit coating particles in the surface of cylindrical portion and the part that applying liquid contacts.
As a result, under cylindrical portion only is immersed in situation in the applying liquid that is housed in the applying liquid container, on the external peripheral surface of cylindrical portion, during the galvanic deposit coating particles, can prevent from the surface of applying liquid, to produce fluctuation.Therefore, coating can be precisely defined at the desirable place of the external peripheral surface of cylindrical portion.
Therefore, when implementing these embodiment of the present invention, for example, prepare a plurality of coating units that are provided with the applying liquid container at least, this applying liquid container is accommodated applying liquid and top end opening, and in each process, from corresponding coating device, select a coating unit, use the coating unit of this selection to be used for implementing this process.
In addition, when implementing foregoing invention, can adopt following method, promptly, for example prepare a coating unit, this coating unit is provided with the applying liquid container of accommodating applying liquid and top end opening and upwards sprays the nozzle that covers liquid, only uses this coating unit to carry out each process.
In addition, when implementing when of the present invention, for example, for each step, change the liquid level that is housed in the applying liquid in the applying liquid container and nozzle and wheel hub relative position and will be from the jet method of the applying liquid of nozzle ejection.
(embodiment 1)
Fig. 1 and Fig. 2 illustrate embodiments of the invention 1.In the present embodiment, the hub body 13a of formation shown in Figure 26 wheel support cage unit 5a above-mentioned is the object of present embodiment.The surface that applies is a part that constitutes the outboard end surface of the inner circumferential surface of cylindrical portion 16 of hub body 13a and hub body 13a, is encased by cylindrical portion 16 around this part (in Fig. 1,2,27 (H) with dotted line α 8Shown part).For the surface (α that will apply 8) go up formation coating 31, at first to this surface (α that will apply 8) implement the pre-treatment of oil removing and so on.
Then, carry out surface (α that the coating particles galvanic deposit will applied 8) on operation.Under the situation of present embodiment, when carrying out this operation, use rubber is made, the sheltering of round-ended cylinder shape that have of top end opening covers 32.Here it is, when carrying out top-operation, at first, as shown in Figure 1, with shelter cover 32 top end surface around the whole periphery of cylindrical portion 16 flexibly by on the outboard end surface that is pressed in cylindrical portion 16.Correspondingly, at the outboard end surface of cylindrical portion 16 and the surface (α that will apply 8) between boundary member be separated into the close state of liquid.Under this state, the feed pipe 29 of applying liquid 28 by being provided with the above-mentioned state of sheltering the middle body of cover 32 bottom 33 of the close perforation of liquid supplies to the surface (α that will be applied continuously 8) and shelter in the space that cover 32 internal surface surrounds.Its result, the air in this space by be arranged on the part of bottom 33 from feed pipe 29 away from part on outage 34 be discharged to the outside, and filling applying liquid 28 in the superincumbent space.Correspondingly, make this applying liquid 28 and the whole surface (α that will apply 8) contact.
In addition, supply to applying liquid 28 space, be discharged to the outside by above-mentioned outage 34 subsequently from feed pipe 29, and again as supplying to applying liquid 28 in the space by feed pipe 29.Its result under the situation of present embodiment, because applying liquid 28 supplies to above-mentioned space continuously, therefore can produce liquid stream in this space, therefore, even bubble remains in this inside, space, can prevent that also these bubbles from resting on the surface (α that will apply 8) a place.
In case applying liquid 28 as described above with the whole surface (α that will apply 8) contact, then subsequently, under this state, (for example voltage is added between the second electrode (not shown) that is located at the first electrode (not shown) in the applying liquid 28 and contacts with hub body 13a, respectively the first electrode side is connected to positive pole, and the second electrode side is connected to negative pole).Its result is by the surface (α that makes the coating particles ionization in the applying liquid 28 and will apply these Ionized coating particles galvanic deposit 8) on, with this surface (α that will apply 8) the undried coating 31 of last formation.
In case undried coating 31 is formed on the surface (α that will apply 8) on, then stop as shown in Figure 2 subsequently applying liquid 28 being fed to this space, and the applying liquid in this space 28 is rejected to the outside by outage 34 from feed pipe 29.In addition, if the applying liquid in this space 28 is discharged to when outside, then this spatial the inside becomes vacuum basically, and the film of applying liquid 28 is formed on the outboard end opening portion of cylindrical portion 16, blocks this outboard end opening portion.Under this state, if the outboard end surface of cylindrical portion 16 is separated with the top end surface of sheltering cover 32, then at that constantly, above-mentioned film will break, the drop of applying liquid 28 is splashed in the outside space.Just keep the degree of cleaning of space outerpace and prevent that applying liquid 28 is attached to the surface (α that will apply in the hub body 13a surface 8) with outside part, above-mentioned this phenomenon be not preferred.
Therefore, under the situation of present embodiment, in case applying liquid 28 is discharged to the outside in the above-mentioned space, then follow, to pass the outboard end opening portion that blows to cylindrical portion 16 near the air of the fore-end ejection of the air nozzle 35 of the state setting of the top end part of sheltering cover 32.As a result, the film 28 that is formed on the applying liquid on the outboard end opening portion of cylindrical portion 16 breaks, and the pressure in the above-mentioned space is near (preferably equaling ambient pressure) ambient pressure.Then, the outboard end of cylindrical portion 16 surface separates with the top end surface of sheltering cover 32, and dry coating 31 makes its drying by heating not, thus this coating 31 is baked to the surface (α that will apply 8) on.At last, cool off this coating 31, finish applying operation.
As mentioned above, in the method that the galvanic deposit on wheel hub of present embodiment applies, make applying liquid 28 and the surface (α that will apply 8) contact, the surface (α that will apply simultaneously 8) the upward operation of galvanic deposit coating particles, be under following state, to carry out, that is, and the surface (α that will apply 8) and in abutting connection with surface (α that this will apply 8) part (the outboard end surface of cylindrical portion 16) between boundary member by shelter the cover 32 liquid thickly separate.Therefore, in this operation, the surface (α that can prevent Yu will apply 8) contact applying liquid 28, with the surface of hub body 13a in this surface (α that will apply 8) in addition part contact.Particularly, under the situation of present embodiment, by sheltering cover 32 liquid, and Masking strip is not installed to the surface (α that this will apply thickly by being pressed in above-mentioned boundary member 8) in addition place, can reach the above-mentioned effect that prevents.Therefore, under the situation of present embodiment, can easily implement the surface (α that only will apply 8) the upward operation of formation coating 31.
In the above embodiments 1, in order to make the surface (α that will apply 8) contact with applying liquid 28, use a following method, that is, applying liquid 28 is supplied to the surface (α that will be applied 8) and shelter cover 32 internal surface round the space in, be full of inside this spatial with applying liquid 28.But, when enforcement is of the present invention, replace aforesaid method, available another method, that is, applying liquid 28 is firmly discharged towards the top continuously from the top end opening of above-mentioned feed pipe 29, with this applying liquid 28 that makes this ejection continuously with the whole surface (α that will apply 8) contact.
(embodiment 2)
Below, Fig. 3 illustrates embodiments of the invention 2.In the present embodiment, the hub body 13 with the wheel support cage unit 5 that is configured for driving wheel shown in Figure 25 is the object of present embodiment.The surface that applies is outside half one in footpath of a part that constitutes the outboard end surface of the inner circumferential surface of cylindrical portion 16 of hub body 13 and hub body 13, is encased by cylindrical portion 16 around this part that (this part is with dashed lines α in Fig. 3 9Expression).Under the situation of present embodiment, inside half one in footpath of the part on the outboard end surface of, hub body 13 16 that surround by cylindrical portion is not that the reason on the surface that will apply is, because the supporting surface (referring to Figure 25) that inside half one in footpath is a nut 25, apply if implement galvanic deposit in this inside half one in footpath, then nut 25 will fluff easily.
Therefore, under the situation of present embodiment, the surface (α that apply 9) on carry out electrocoating paint particulate when operation, situation as above-mentioned embodiment 1, by on the outboard end surface (as shown in FIG.) that is pressed in above-mentioned cylindrical portion 16, boundary member is with the outboard end surface of cylindrical portion 16 and the surface (α that will apply by a top end surface elasticity of sheltering cover 32 9) liquid thickly separates.Simultaneously, with supporting and be fixed on second top end surface of sheltering cover 36 on the top end part of feed pipe 29, rubber system, flexibly by be pressed in by cylindrical portion 16 round, the footpath of the part on the outboard end surface of hub body 13 is inwardly on half part.Therefore, sheltering cover 36 by second will inside half part in this footpath and the surface (α that will apply 9) between the boundary portion separatory thickly separate, and the outboard end opening of splined hole 22 that is located at the middle body of hub body 13 is plugged.Then, under this state, applying liquid 28 is by feed pipe 29 and be located at second liquid feeding channel of sheltering in the cover 36 37 and supply to the surface (α that will be applied continuously 9) and shelter in the space that cover 32 internal surface surrounds.As a result, the air in this space is discharged to the outside by outlet orifice 34, and this spatial the inside is filled with applying liquid 28.Therefore, applying liquid 28 and the above-mentioned whole surface (α that will apply 9) contact.
Under the situation of present embodiment, finish the surface (α that will apply 9) go up the operation of galvanic deposit coating particles after, be blown into air so that prevent the top end part of the air nozzle 35 of applying liquid sputter, be arranged in the medial extremity part of splined hole.When galvanic deposit operation is finished, shelter cover 32 and second and shelter cover 36 and fall, and pressurized air is discharged from air nozzle 35.At this moment, be attached to second applying liquid of contact part of sheltering the outboard end surface of cover 36 top surface and hub body 13 and be not splashed to the periphery (particularly in the splined hole 22) of this part.In addition, attached to the unnecessary applying liquid on the inner circumferential surface of this cylindrical portion 16, the air trapping that is flowed downward by the inner circumferential surface along this cylindrical portion 16 covers in 32 to sheltering.Other structure and effect are similar to the structure and the effect of the above embodiments 1.
In addition, in the above embodiments 2, second shelters cover 36 supports and is fixed on the top end part of feed pipe 29, and still, when enforcement was of the present invention, second shelters cover 36 also can support and be fixed on the supporting member separately.In addition, about the above embodiments 2, under situation of the present invention, by implement under the state in the applying liquid that cylindrical portion 16 is immersed in the applying liquid container galvanic deposit operate replace shelter cover 32 by the outboard end surface that is pressed in cylindrical portion 16 on, except dotted line (α 9) outside the part that illustrates, coating particles also can galvanic deposit on the outboard end surface of cylindrical portion 16 and external peripheral surface (being immersed in the part in the applying liquid).
(embodiment 3)
Below, Figure 4 and 5 illustrate embodiments of the invention 3.Identical with the embodiment 1 shown in Fig. 1 and 2, in the present embodiment, the object that the unitary hub body 13b of wheel support cage that is configured for follow-up pulley is a present embodiment.But under the situation as the hub body 13b of the object of present embodiment, outer screw section 38 is located at the medial extremity part of hub body 13b, the nut on the medial extremity surface of ring 14 (referring to Figure 26) in this outer screw section 38 is screwed into and is used for pushing.In addition, under the situation of present embodiment, identical with the situation of the above embodiments 1, the surface that applies is a part that constitutes the outboard end surface of the inner circumferential surface of cylindrical portion 16 of hub body 13b and hub body 13b, is surrounded by cylindrical portion 16 around this part (among Fig. 4 and Figure 27 H with dotted line α 8The part that illustrates.)
Under the situation of present embodiment, with the coating particles galvanic deposit to the surface (α that will apply 8) when going up employed shelter cover 32a be configured to columnar substantially, and connect and be fixed to that material such as metal is made, have round-ended cylinder to describe the top end opening part of device 39.Correspondingly, under the situation of present embodiment, the state setting of 40 central part is divided in the bottom that supply pipe 29 thickly passes container 39 with liquid.In addition, outage 34 is located at the part away from feed pipe 29 in the bottom branch 40.
In addition, under the situation of present embodiment, top half part of sheltering cover 32a is a conically shaped portion 41, and this part is along tilting the closer to the more little direction of top side radial dimension.The outside diameter dimension D 41 of the major diameter side of this conically shaped portion 41 is greater than the internal diameter size d16 of above-mentioned cylindrical portion 16 (D41＞d16), and the outside dimension d41 of the minor diameter side of this conically shaped portion 41 is less than the internal diameter size d16 of cylindrical portion 16 (d41＜d16).In addition, otch 42 in the smaller diameter side circumference upper shed of conically shaped portion 41, on the smaller diameter side end of conically shaped portion 41, be respectively formed on a plurality of positions (six of example positions among the figure) of the circumferential direction of the outside dimension part littler (the dashdotted radially inner side part among Fig. 5) than the internal diameter size d16 of cylindrical portion 16.In the present embodiment, each otch 42 is equivalent to " oil drain passage " respectively.
Under the situation of present embodiment, at the surface (α that implements the coating particles galvanic deposit will applied 8) on operation the time, as shown in the figure, constitute the inside that cylindrical portion 16 is inserted in the smaller diameter side end of the conically shaped portion 41 shelter cover 32a, and the external peripheral surface elasticity of conically shaped portion 41 is by outboard end surface that is pressed in this cylindrical portion 16 and the surface (α that will apply 8) between boundary member on.As a result, make boundary member be in the close state of liquid.Under this state, applying liquid 28 infeeds the surface (α that will be applied continuously by feed pipe 29 8) and shelter in the space that the internal surface of cover 32a and container 39 surrounds.Its result, the air in this space is discharged to the outside by outlet orifice 34, and this spatial the inside then is full of applying liquid 28.Therefore, this applying liquid 28 and the whole surface (α that will apply 8) contact.
Under the situation of present embodiment, because the smaller diameter side end parts of conically shaped portion 41 is inserted the inside of cylindrical portion 16, so cross section is that applying liquid 28 collects in this liquid cell part 43 between the inner circumferential surface of leg-of-mutton, that ring-shaped liquid pond part 43 is formed on conically shaped portion 41 external peripheral surface and cylindrical portion 16.But when the applying liquid in this space 28 was discharged to the outside by outlet orifice 34, the applying liquid 28 in this liquid cell part 43 was discharged to the radially inner side of conically shaped portion 41 by the inboard of above-mentioned each otch 42.Its result, under the situation of present embodiment, subsequently, when the external peripheral surface of the inner periphery of the outboard end of cylindrical portion 16 part and conically shaped portion 41 separates, can prevent owing to applying liquid 28 collects in the part damage that coated liquid is encased.On the other hand, if do not form each otch 42, then shown in the arrow of Fig. 6, applying liquid 28 in the liquid cell part 43 will occur collecting in drips to the external peripheral surface or the like of conically shaped portion 41 and further reflects back and be attached to the surface (α that will apply the surface of hub body 13b from these places from the outboard end circumference of cylindrical portion 16 8) in addition the part.Other structure and effect are similar to structure and the effect of the embodiment shown in above-mentioned Fig. 1 and 2.
(embodiment 4)
Below, Fig. 7 illustrates embodiments of the invention 4.Under the situation of present embodiment, the fore-end (top end part among Fig. 7) of the air nozzle 35 that is provided with the state of the close bottom 40 of running through container 39 of liquid is arranged on the radially inner side of the cylindrical portion 16 that constitutes hub body 13b.Simultaneously, the top end opening of air nozzle 35 is set as relative with the outboard end surface of hub body 13b.Its result makes the air that sprays from the top end opening of air nozzle 35 flow along the outboard end surface of hub body 13b and the inner circumferential surface of cylindrical portion 16, to blow from the top on the applying liquid during collecting in liquid cell part 43.Therefore, collect in the applying liquid in the liquid cell part 43, can easily be discharged to the radially inner side of sheltering cover 32a by a plurality of otch 42 that are located on the tip edge of sheltering cover 32a.Other structure and effect are similar to the structure and the effect of the foregoing description 3.
(embodiment 5)
Below, Fig. 8 illustrates embodiments of the invention 5, under the situation of present embodiment, the surface that applies is outboard end surface and the inner circumferential surface that constitutes the cylindrical portion 16 of hub body 13b, and the part on the outboard end surface of hub body 13b, surrounded by cylindrical portion 16 around this part (this part in Fig. 8 and 27 (G) with dotted line (α 7) illustrate).Correspondingly, under the situation of present embodiment, as the surface (α that will apply 7) on carry out electrocoating paint particulate when operation, as shown in the figure, close the vertical part of the inner circumferential surface of sheltering cover 32b of general cylindrical shape, elasticity by the whole excircle on the outboard end surface that is pressed in cylindrical portion 16 partly on.Surface (the α that correspondingly, apply 7) and the boundary portion separatory of the external peripheral surface of cylindrical portion 16 thickly separate.Other structure and effect and above-mentioned embodiment's 3 shown in Figure 4 is similar.
(embodiment 6)
Below, Fig. 9 illustrates embodiments of the invention 6.Under the situation of present embodiment, as the surface (α that will apply that carries out at hub body 13a 7) when going up the operation of galvanic deposit coating particles, as shown in the figure, be essentially tip edge part columnar structured, that shelter cover 32c, divide near relative with the whole outer circumference portion on the outboard end surface of the cylindrical portion 16 that constitutes hub body 13a with the interval of for example nearly 0.5mm.Allow to be full of by a small amount of applying liquid 28 of sheltering in the space that cover 32c and hub body 13a encase, flow out in the outside space by the minim gap 45 between the outboard end surface that is formed on the tip edge part of sheltering cover 32c and cylindrical portion 16, under this situation, carry out the galvanic deposit operation.
Carry out by this way therein under the situation of present embodiment of galvanic deposit operation, because the space (interior space) and the external space that masked cover 32c and hub body 13a surround couple together by minim gap 45, even be discharged to the outside so be full of this spatial applying liquid 28 by the outlet orifice (not shown), interior space can not become vacuum yet.Its result subsequently, when sheltering cover 32 and cylindrical portion 16 when being separated from each other, can prevent to be attached to and want coated surface (α 7) on applying liquid 28 be splashed to the problem of circumference.The structure of other parts and effect and the foregoing description 5 similar.
In addition, in the above embodiments 6, when carrying out the galvanic deposit operation, the top edge part of sheltering cover 32c is closely relative with the whole excircle part on the outboard end surface of cylindrical portion 16, can be instead, even under the situation that a part that only makes peripheral direction thickly is pressed near rest part liquid relative, that make circumferential direction, also can obtain similar effects.This also can be applied among the above embodiments 1-4.
(embodiment 7)
Below, Figure 10 illustrates embodiments of the invention 7.Under the situation of present embodiment, the surface that apply is to constitute the external peripheral surface of the outside half part of cylindrical portion 16 of hub body 13b and outboard end surface (among Figure 10 and Figure 27 (B) with dotted line α 2The part that illustrates).Under the situation of present embodiment, as the surface (α that carries out to apply 2) when going up the operation of galvanic deposit coating particles, with shown in Figure 28 the same with above-mentioned existing method, the outside of cylindrical portion half part is immersed in the applying liquid 28 that is included among the applying liquid container 27a.But, under the situation of present embodiment, be to carry out dip operation under the state that has on the base cone shape whole external peripheral surface of sheltering cover 32d cylindraceous flexibly by being pressed in structure with the inner circumferential portion on the outboard end surface of cylindrical portion 16.Therefore, in this dip operation, thickly separate the surface (α that will apply by the boundary portion separatory 2) and the inner circumferential surface of cylindrical portion 16, the inner circumferential surface of this cylindrical portion 16 can not contact with applying liquid 28.Sheltering cover 32d supports and is fixed on the top surface of the support plinth 44 that is fixedly installed on applying liquid container 27a.
In addition, under the situation of present embodiment, because applying liquid 28 is supplied and is discharged among the applying liquid container 27a by feed pipe 29, the liquid level position that therefore is included in the applying liquid 28 among the applying liquid container 27a can raise or reduce.Under the situation of present embodiment, when the inner circumferential portion on the outboard end surface of cylindrical portion 16 is sheltered on the external peripheral surface that covers 32d so that implement the coating particles galvanic deposit to the surface (α that will apply by being pressed in 2) when going up (as mentioned above), the liquid level position of applying liquid is set as lower than the basal surface of sheltering cover 32d.Subsequently, when sheltering cover and be pressed as mentioned above, liquid level is elevated to the tip edge (this tip edge is crossed in applying liquid 28 overflows) of applying liquid container 27a as shown in the figure.In addition, after the galvanic deposit operation on finish, liquid level position is reduced to and is lower than the basal surface of sheltering cover 32d, and then, the inner circumferential portion on the outboard end surface of cylindrical portion 16 is separated with the external peripheral surface of sheltering cover 32d.Other structure and effect and above-mentioned respective embodiments similar.
In each above-mentioned embodiment, used a kind of method, that is, apply the operation that forms coating by galvanic deposit and be implemented on an assembly wheel support cage unit single hub body in the past.But, implement a first aspect of the present invention under the situation of the method that galvanic deposit on the wheel hub applies, as shown in figure 28 the same with above-mentioned existing method, apply the operation that forms coating by galvanic deposit and may be implemented in a wheel support cage unit that assembles.
(embodiment 8)
Figure 11 and 12 shows embodiments of the invention 8.In the present embodiment, the hub body 13a of formation wheel support cage unit 5a shown in Figure 26 and explanation in the above is the object of present embodiment, outboard end at the external peripheral surface of the cylindrical portion 16 that constitutes hub body 13a is assigned to pars intermedia, outboard end surface and inner circumferential surface, and part (the dotted line α among Figure 11,12 and 27 (F) around being surrounded by cylindrical portion 16 in the outboard end surface of hub body 13a 6Shown part) going up the enforcement galvanic deposit applies.Therefore, under the situation of present embodiment, at first, at dotted line α 6Carry out oil removing on the shown part and clean, subsequently, carry out pre-treatment (also can omit) when needed as chromic salt gloss finish and so on.Then, at dotted line α 6Carry out the operation of electrocoating paint particulate on the shown part.Under the situation of present embodiment, in two processes of separating (first process, second process), carry out this operation.
The first step manipulate coating unit shown in Figure 30 46 above-mentioned (below be also referred to as " first coating unit 46 ".Especially, as shown in figure 11, constitute the whole outboard end surface of the cylindrical portion 16 of hub body 13a, contact with the surface of the applying liquid 28 that is full of in the applying liquid container 48 that constitutes this first coating unit 46.Simultaneously, make the outside surface of the guide part 53 on the top end part that is located at nozzle 52, vis-a-vis the whole portion around being surrounded in the outside end face of hub body 13a and the inner circumferential surface of this cylindrical portion 16 by cylindrical portion 16.Under this state, upwards spray applying liquid 47 by top end opening from nozzle 52, make the applying liquid 47 of injection flow through gap portion between the above-mentioned mutual facing surfaces, its state is that this space segment is full of applying liquid 47.Thereby, applying liquid 47 respectively with the outboard end surface of hub body 13a in the whole portion that surrounded by cylindrical portion 16 of periphery, contact with the whole inner circumferential portion of cylindrical portion 16.
In addition, behind the gap portion that passes between the mutual facing surfaces, the applying liquid 47 of upwards discharging from the top end opening of nozzle 52 injects the applying liquid 47 that applying liquid container 48 is adorned as described above.Subsequently, the applying liquid 47 in the applying liquid container 48 overflows the amount of having injected by this mode from the outside portion of last ora terminalis of applying liquid container 48.The accumulator tank 49 that the applying liquid 47 that so overflows is configured first coating unit 46 reclaims, and again as the applying liquid 47 of discharging from the top end opening of nozzle 52.The method of this use applying liquid 47 is used in all coating units of present embodiment usually, and among the said embodiment 9-11 in back.In the example shown in the figure, because the outboard end surface of cylindrical portion 16 contacts with the surface of the applying liquid 47 that is full of in the applying liquid container 48 as described above, therefore, the lip-deep applying liquid 47 that can prevent to spatter the injection applying liquid 47 in this surface is splashed to the space outside the cylindrical portion 16.
As mentioned above, in case the part on every side that surrounded by cylindrical portion 16 in the outboard end surface of the outboard end of cylindrical portion 16 surface and inner circumferential surface and hub body 13a contacts with applying liquid 47, then subsequently, under this state, with voltage be added to unshowned in the drawings, and other part electrodes in contact of applying liquid 47 and hub body 13a between (for example, this electrode side is connected to positive pole, and this hub body 13a links negative pole).Its result is coated on the part that contacts with applying liquid 47 by the coating particles in the ionization applying liquid 47 and with Ionized coating particles deposition, forms undried coating 54 on this part.To the operation here is the operation of first process.
If finished the operation of aforesaid first process, then carried out the operation of second process.The second coating unit 46a that manipulates as shown in Figure 12 of second process carries out.The basic structure of this second coating unit 46a roughly basic structure with above-mentioned first coating unit 46 is the same.But under the situation of the second coating unit 46a, the shape of the top end part of nozzle 52a is simple round shape, and the top end part of nozzle 52a is arranged on below the liquid level of the applying liquid 47 that is full of in the applying liquid container 48.
When carrying out second process with this second coating unit 46a, applying liquid 47 supplies to the applying liquid container 48 continuously from the top end opening of nozzle 52a.Its result, when the applying liquid in the applying liquid container 48 47 when the tip edge of applying liquid container 48 overflows to the outside, the outboard end that constitutes the cylindrical portion 16 of hub body 13a is assigned to the middle part and is immersed in the applying liquid 47.The reason that applying liquid 47 is overflowed and flood cylinder 16 is, for the settling position of the liquid level that keeps applying liquid 47 and suitably regulate the scope that will apply on the external peripheral surface of cylindrical portion 16.In addition, under the situation of present embodiment, in order to reduce to take place the possibility of fluctuation on the radial outside of cylindrical portion 16, the top end opening of nozzle 52a is arranged on the radially inner side of cylindrical portion 16, and applying liquid 47 is gently discharged from the top end opening of nozzle 52.
During in case the outboard end of cylindrical portion 16 is immersed in applying liquid 47 in the aforesaid applying liquid container 48 to middle portion, the outer face of this cylindrical portion 16 and the outer end of periphery and inner peripheral surface are contacted with applying liquid 47 to pars intermedia, then subsequently, under this state, voltage is applied between unshowned in the drawings, electrode contacting with another part of applying liquid 47 and the hub body 13a (for example this electrode side is connected to positive pole, and this hub body 13a side is linked negative pole).Its result, by the coating particles in the ionization applying liquid 47 and these Ionized coating particles galvanic deposit with part that applying liquid 47 contacts on, can on this part, form undried coating 54.Operation thus much is the operation in second step.
In case undried coating 54 has been formed on dotted line α 6On the shown whole portion, then subsequently, dry coating 54 is not so that its drying is baked on the above-mentioned surface with this coating 54 by heating this, and subsequently, cooling coating 54 applies operation to finish.
As mentioned above, present embodiment under the situation that galvanic deposit on the wheel hub applies, separately carry out: make the operation (first process) from the inner circumferential surface of the part around the coating solution 47 of the top end opening ejection of nozzle 52 is injected into being surrounded by cylindrical portion 16 the outboard end surface of hub body 13a and this cylindrical portion 16; And the outboard end of cylindrical portion 16 is assigned to the middle part be immersed in operation (second process) in the applying liquid 47 that is filled in the applying liquid container 48.As a result, when carrying out the operation of second process, can prevent to be injected into the problem that produces fluctuation on the applying liquid 47 that is full of the applying liquid container 48, on the surface of applying liquid 47 from the applying liquid 47 that the top end opening of nozzle 52 (52a) sprays.Therefore, when carrying out the operation of second process, can make applying liquid 47 stable to the contact condition at middle part with the peripheral end of the external peripheral surface of cylindrical portion 16.Its result, under the situation of present embodiment, the outboard end that coating 54 can be precisely defined at the external peripheral surface that comprises cylindrical portion 16 to the middle part, with dotted line α 6On the whole portion that illustrates.
(embodiment 9)
Figure 13 and 14 illustrates embodiments of the invention 9.In the present embodiment, the hub body 13a of formation wheel support cage unit 5a shown in Figure 25 and explanation in the above is the object of present embodiment, the outboard end that galvanic deposit applies the external peripheral surface be implemented in the cylindrical portion 16 that constitutes hub body 13 to the middle part, outboard end surface and inner circumferential surface, and outside half part (the middle dotted line α of Figure 13,14 and 27 (F) in the footpath that surrounded by cylindrical portion 16 of the periphery in the outboard end surface of hub body 13 4Shown part).The footpath of the part of being surrounded by cylindrical portion 16 around in the outboard end surface of hub body 13 inwardly half reason of partly not carrying out galvanic deposit is, this footpath inwardly half part is the supporting surface (referring to Figure 25) of nut 25, if and this footpath inwardly half part implement galvanic deposit and apply, then nut 25 fluffs easily.
Therefore, under the situation of present embodiment, when carrying out the operation of first process as shown in figure 13, half part contact (with further for applying liquid 47 contact with the inner circumferential surface of splined hole 22) in order inwardly not make from the applying liquid 47 of the top end part ejection of the nozzle 52b that constitutes the first coating unit 46b and footpath, with shelter cover 55 cover directly inside partly partly and the outboard end opening of splined hole 22.Shelter cover 55 resilient materials and form a conical butt by rubber and synthetic resins and so on, and as bottom parts 56 supportings of the end parts of smaller diameter side (downside among Figure 13) and be fixed on the top end part of nozzle 52b, simultaneously, the whole liquid of open circumferential of larger diameter side (upside among Figure 13) is thickly by on the outboard end surface that is pressed in hub body 13.In addition, on the top end part of nozzle 52b, applying liquid 47 can freely through mesh part 57 be located at along whole circumference to be sheltered between cover 55 and the guide part 53.Applying liquid 47 can be discharged from the top end part of nozzle 52b by this mesh part 57.Under the situation of present embodiment, identical with the foregoing description 8, use the second coating unit 46a to carry out the operation in the second following step as shown in Figure 14.The situation of other structure and effect and the foregoing description 8 is similar.
(embodiment 10)
Below, Figure 15 and 16 illustrates embodiments of the invention 10.In the embodiment shown in above-mentioned Figure 11 and 12 8, adopt and use different coating unit 46,46a to carry out the method for operating of first process and second process respectively.Relative therewith, under the situation of present embodiment, adopt and use the coating unit 46c shown in Figure 15 and 16 to carry out each method of operating of first process and second process.First coating unit, 46 basic structures of using in the basic structure of the coating unit 46c of Shi Yonging and the foregoing description 8 are roughly the same in the present embodiment.But, under the situation of the coating unit 46c of present embodiment, nozzle 52 can with respect to applying liquid container 48 and recycling bin 49 vertically (vertical direction among Figure 15 and 16) move.Therefore, under the situation of present embodiment, annular seal 60 is located at respectively on the inside circumference of the through hole 58,59 that forms in each bottom parts 50,51 that constitutes applying liquid container 48 and recycling bin 49, and the inside circumference of each tightness system 60 contacts with the external peripheral surface at the middle part of nozzle 52 respectively guaranteeing to seal fully and allow and endwisely slips.
Under the situation of present embodiment, when using coating unit 26c to carry out the operation of first process, as shown in figure 15, the top end opening of nozzle 52 is arranged on the top on the surface of the applying liquid 47 that is filled in the applying liquid container 48.Under this state, shown in same figure, to carry out the operation of first process with the similar mode of the situation of the foregoing description 8.Subsequently, when carrying out the operation of second process, shown in Figure 15,16,, the top end opening of nozzle 52 is configured to be lower than the liquid level of the applying liquid 47 that is filled in the applying liquid container 48 by moving down the top end opening of nozzle 52.Simultaneously, by among coating unit 46c or the hub body 13a one or both are moved, the outboard end that constitutes the cylindrical portion 16 of hub body 13a is immersed in the applying liquid 47 to pars intermedia.Under this state, as shown in figure 16, the operation of second process is to carry out with the foregoing description 8 similar modes.
Under the situation of above-mentioned present embodiment, use a coating unit 46c to carry out the operation of first, second process, therefore compare with the situation of the foregoing description 8, can realize shortening the operating time, the reduction operation space, reduce the cost of operating gear.Other structure is identical with the situation of the foregoing description 8 with effect.
(embodiment 11)
Below, Figure 17 and 18 illustrates embodiments of the invention 11.In the embodiment shown in above-mentioned Figure 13 and 14 9, adopted the method for operating of carrying out first process and second process with different coating unit 46b, 46a.Relative therewith, under the situation of present embodiment, adopt the method for operating of carrying out first process and second process with a coating unit 46d (shown in Figure 17,18) respectively.The basic structure of the first coating unit 46b that uses in the basic structure of used coating unit 46d and the foregoing description 9 in the present embodiment is identical substantially.But, under the situation of the coating unit 46d of present embodiment, nozzle 52b can with respect to applying liquid container 48 and recycling bin 49 vertically (vertical direction among Figure 17,18) move.Therefore, under the situation of present embodiment, annular seal 60 is located at respectively on the inside circumference of the through hole 58 that forms in each bottom parts 50 and 51 that constitutes applying liquid container 48 and recycling bin 49 and 59, and, the inside circumference of each tightness system 60 contacts with the external peripheral surface at the middle part of nozzle 52b respectively, endwisely slips to guarantee to seal fully and allow.
Under the situation of present embodiment, when using coating unit 46d to carry out the operation of first process, as shown in figure 17, be arranged on the top of the liquid level of the applying liquid 47 that is filled in the applying liquid container 48 as the mesh part 57 of the top end opening of nozzle 52b.Under this state, as shown in the figure, the operation of first process is carried out in the mode that is similar to embodiment 9 recited above.Subsequently, when carrying out the operation of second process, shown in Figure 17 and 18, move down by making nozzle 52b, be located at the top end part of nozzle 52b targeting part 53 and mesh part 57, be configured in below the liquid level of the applying liquid 47 that is filled in the applying liquid container 48.But, at this moment, shelter cover 55 top end part at least and be arranged on the top of the liquid level of applying liquid 47, so that the inside (in the recess that on top surface, is provided with) that applying liquid 47 is not entered shelter cover 55.Simultaneously, by in coating unit 46d or the hub body 13 one or both are moved, the outboard end that constitutes the cylindrical portion 16 of hub body 13 is immersed in the applying liquid 47 to pars intermedia.Under this state, as shown in figure 18, the operation of second process is to carry out with the foregoing description 9 similar modes.
Under the situation of above-mentioned present embodiment, owing to use single coating unit 46d to carry out the operation of first process and second process, therefore with the situation of the above embodiments 9 relatively, can realize shortening the operating time, the reduction operation space, reduce the cost of operating gear.Other structure is identical with the situation of the foregoing description 9 with effect.
In the above embodiments 8-11, as the nozzle 52 and the 52b that constitute coating unit 46,46b and 46c, use the device that targeting part 53 is set in the upper end of each nozzle 52,52b, still, this targeting part 53 also can omit.This point also can be used for the nozzle 52 of above-mentioned formation coating unit 46 shown in Figure 30.
In addition, in the above embodiments 8-11, carry out method according to the coating of galvanic deposit on wheel hub of a second aspect of the present invention, a wheel hub (hub body 13) that is used to constitute the wheel hub (hub body 13a) of wheel support cage unit 5a shown in Figure 26, that be used for follow-up pulley and is used to constitute wheel support cage shown in Figure 25, that be used for driving wheel unit 5.But, according to method second aspect present invention, that galvanic deposit applies on wheel hub, be not limited to these aspects, can also be used to constitute the unitary wheel hub of wheel support cage (comprise that the inner race in the outside is directly arranged in the supermedial wheel hub of the external peripheral surface of wheel hub, and the inner race in the outside being located at the wheel hub that forms on the external peripheral surface of the wheel hub interior ring middle part, that separate) of various structures.
In addition, in the foregoing description 8-11, use a kind of method, that is, carry out being used for an one hub body before the assembly wheel support cage unit with the operation that galvanic deposit apply to form coating.But, carry out a second aspect of the present invention under the situation of the method that galvanic deposit on the wheel hub applies, apply the operation that forms coating by galvanic deposit and also can be used for the wheel support cage unit that assembles.
When making various shown in above-mentioned Figure 25,26 when taking turns support cage unit 5,5a, by the medial extremity cylindrical portions may partly at hub body 13,13a is forged processing, is handled as roll extrusion, make the radially outwards viscous deformation of this cylindrical portion, on this part, form crimping portion 19 thus.Under the situation of the operation that forms crimping portion 19 after arbitrary operation of for example carrying out the foregoing description 8-11, if the part that has formed coating 54 on it (for example, the part of being surrounded by cylindrical portion 16 around in the outboard end surface of each hub body 13,13a, inner circumferential surface with cylindrical portion 16) as supporting surface (surface of touching with a seated connection), then the power that applies when handling can be torn coating 54.Therefore, in order to prevent the generation of this class problem, preferably, the part (for example, the outer surface of mounting flange 15) that will not form coating 54 is as a supporting surface.
(embodiment 12)
Figure 19-22 represents embodiments of the invention 12.In the present embodiment, hub body 13a shown in Figure 19 is the object of present embodiment.Hub body 13a is that of above-mentioned wheel support cage unit 5a shown in Figure 26 constitutes part.In the example shown in the figure, the stage casing whole portion (part shown in the cross shade line among the figure) that the high frequency hardening treatment is applied to the external peripheral surface of the hub body 13a that comprises inner race 17a goes up, on this part, to form hardened layer 61.By forming hardened layer 61, the weather resistance of hub body 13a increases.
Under the situation of present embodiment, on external peripheral surface, inner circumferential surface and the outboard end surface of the lip-deep cylindrical portion 16 of the outboard end that is located at hub body 13a, and the radially middle part (among Figure 19 with the part shown in the dotted line α) on the outboard end surface of this hub body 13a is carried out galvanic deposit and is applied.Therefore, under the situation of present embodiment, at first, carry out pre-treatment in the drawings on the part shown in the dotted line α as the regulation of oil removing cleaning and so on, subsequently, part shown in the dotted line α is contacted under the state of (being immersed in wherein) with the applying liquid (not shown), with voltage be applied to another part electrodes in contact (not shown) of applying liquid and with another electrode (not shown) of hub body 13a contact between (the coating liquid side is connected with positive pole, and hub body 13a side is connected with negative pole).Its result, by making the coating particles ionization in the applying liquid, and this Ionized coating particles galvanic deposit on the part shown in the dotted line α, on this part, form undried coating 62 with this.For simplicity, in the example shown in the figure, coating 62 illustrates with heavy line, and still, the width of heavy line is not represented the thickness of coating 62.According to the time span that applies above-mentioned voltage, after baking, the thickness of the reality of coating 62 for example is about several μ m.
Subsequently, after being formed as described above undried coating 62, use the undried coating of sending from ceramic heater 63 as shown in figure 21 62 of FAR INFRARED HEATING.Its result, undried coating 62 is dried, and, this coating 62 is baked on the surface of hub body 13a.Under the situation of present embodiment, at this moment the temperature that is heated to of coating 62 is not more than 140 ℃.
In case coating 62 is baked to as described above on the surface of hub body 13a, then subsequently, as shown in figure 22,, finishes applying operation with this to freezing air from water cooler 64 ejections by blowing on the coating 62, making coating 62 coolings.
As mentioned above, present embodiment under the situation of the method that galvanic deposit on the wheel hub applies, the Heating temperature of dry coating is not lower, is not more than 140 ℃.Therefore, even be applied to heat passage under the situation of the supermedial hardened layer 61 of the external peripheral surface that is formed on hub body 13a on this coating 62, the temperature of this hardened layer 61 also can excessively not raise (not being elevated to the temperature that on this hardened layer 61, begins to take place as the ramollescence of annealing or tempering and so on).Therefore, under the situation of present embodiment, when forming coating 62, can prevent that the hardness of hardened layer 61 from reducing.
(embodiment 13)
Below, Figure 23 and 24 expression embodiments of the invention 13.Under the situation of present embodiment, as above-mentioned shown in Figure 20, on the part shown in the dotted line α of above-mentioned Figure 19 by galvanic deposit Ionized coating particles, on this part, form the not working order of dry coating 62, be similar to the situation of the foregoing description 12.
Under the situation of present embodiment, after being formed as described above not dry coating 62, as shown in figure 23, blow to the middle part (having formed the part of hardened layer 61 on it) of hub body 13a to inner end portion from the freezing air of water cooler 64a ejection.Thus, Yi Bian cool off this part, Yi Bian by the undried coating 62 of the FAR INFRARED HEATING of sending from ceramic heater 63.Its result makes coating 62 dryings, and this coating 62 is baked on the surface of hub body 13a.Under the situation of present embodiment, the Heating temperature of coating 62 at this moment is adjusted to 140-220 ℃ scope.
Then, in case coating 62 has been baked on the surface of hub body 13a as mentioned above, then subsequently, cool off coating 62 by the middle part that will blow to hub body 13a to inner end portion (it forms the part of hardened layer 61) from the freezing air that water cooler 64a discharges, to directly blow on coating 62 from the freezing air that water cooler 64 is discharged simultaneously, finish applying operation with this.
As mentioned above, present embodiment under the situation of the method that galvanic deposit on the wheel hub applies, the Heating temperature of not dry shallow layer 62 rise than higher, in 140-220 ℃ scope, but, while cool off undried coating 62 is heated at the middle part of hub body 13a to inner end portion operation.Its result can suppress to raise owing to the heat that is applied to coating 62 causes the temperature of hardened layer 61.Therefore, the excessive temperature that can prevent hardened layer 61 raise (can not be elevated to like this and in hardened layer 61, begin to anneal or the temperature of the ramollescence of tempering and so on).Its result under the situation of present embodiment, can prevent that also the hardness of hardened layer 61 when forming coating 62 from reducing.In addition, under the situation of present embodiment,,, can shorten the required time of baking coating 62 so compare with the situation of the foregoing description 12 because the Heating temperature of undried coating 62 rises than higher.
In addition, under the situation of embodiment 12 and 13, be object with the above-mentioned unitary wheel hub of wheel support cage (hub body 13a) that is configured for follow-up pulley shown in Figure 26, carry out the method for the coating of galvanic deposit on wheel hub of third and fourth aspect of the present invention.But the method that the galvanic deposit on wheel hub of third and fourth aspect of the present invention applies also can be used for the wheel hub (hub body 13) of above-mentioned wheel support cage shown in Figure 25, that be configured for driving wheel unit 5.In addition, the method that galvanic deposit applies on wheel hub is not limited thereto, also can be used for constituting the unitary wheel hub of wheel support cage (comprise that outside inner race is formed directly into the wheel hub at middle part of the external peripheral surface of wheel hub, and outside inner race being formed on the wheel hub on the external peripheral surface of an outer interior ring that separates that is embedded in the wheel hub middle part) of various structures.
In addition, in the foregoing description 12-13, used a method, that is, applied the operation that forms coating and be used for a single hub body before assembly wheel support cage unit by electricity is heavy.But, implement aspect of the present invention third and fourth under the situation of the method that galvanic deposit on the wheel hub applies, apply the operation that forms coating by galvanic deposit and also can be used for the wheel support cage unit that assembles.The wheel support cage unit that assembles is as described above being carried out under the situation of the method that galvanic deposit on the wheel hub applies, except the foregoing description 12 and 13 described effects, also can be implemented in the greasy heat that is included in when forming coating in the rolling body installation portion and worsen.
Apply by galvanic deposit, antirust coating accurately only can be formed in the desirable scope of cylindrical portion, this desirable scope is located at the outer end that constitutes the unitary wheel hub of wheel support cage, this method is not used Masking strip, do not influence the part that forms hardened layer by the high frequency hardening treatment in the wheel hub external peripheral surface yet, do not influence the grease of enclosing in the rolling body installation portion yet.

Claims (12)

1. method that galvanic deposit applies on wheel hub, desirable scope with the coating of being used to form, this scope comprises the part on the surface of cylindrical portion at least in the surface that constitutes the unitary wheel hub of wheel support cage, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler, in order on this desirable scope, to form coating, make under applying liquid and this desirable scope state of contact, make coating particles galvanic deposit in the applying liquid on this desirable scope, it is characterized in that
Make shelter cover and this desirable scope and boundary member between the scope of this desirable scope, in the above-mentioned hub surface contacts or approaching relative state under, carry out the operation of coating particles galvanic deposit on this desirable scope.
2. the method that applies according to the galvanic deposit on wheel hub of claim 1 is characterized in that, and shelters the cover contact or near relative described boundary member, is the peripheral part of outer end face that constitutes the cylindrical portion of wheel hub.
3. the method that applies according to the galvanic deposit on wheel hub of claim 1, it is characterized in that, pass the hole portion of wheel hub vertically in the middle body setting of wheel hub, and with shelter cover contact or near relative boundary member, around surrounded by cylindrical portion, the annular section of the outer end opening of the hole portion of the outer end face of wheel hub.
4. the method that applies according to the galvanic deposit on wheel hub of claim 2, it is characterized in that, radially inner side in cylindrical portion is full of under the state of applying liquid, coating particles in applying liquid galvanic deposit after on the internal surface of the cylindrical portion that constitutes wheel hub, applying liquid is discharged to the outside of this cylindrical portion by the outer end opening of cylindrical portion, afterwards, gas is blown into the outer end opening of this cylindrical portion.
5. the method that applies according to the galvanic deposit on wheel hub of claim 1, it is characterized in that, as sheltering cover, use the whole columnar cover of sheltering that is, shelter the part near the outer surface of leading section of cover, but liquid thickly constitutes circumferential portion in outer end face wheel hub, cylindrical portion whole by being pressed in, and liquid discharge passage is formed on the part that enters above-mentioned cylindrical portion inboard in the fore-end, and this liquid discharge passage connects the outer surface and the interior perimeter surface of described part.
6. method that galvanic deposit applies on wheel hub, desirable scope with the coating of being used to form, this scope comprises the surface of cylindrical portion at least in the surface that constitutes the unitary wheel hub of wheel support cage, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler, in order on this desirable scope, to form coating, the desirable scope of applying liquid and this is contacted, simultaneously, with the coating particles galvanic deposit in this applying liquid on desirable scope, it is characterized in that
Set a plurality of minutes scopes of the scope of the part become desired scope respectively, and be in the process of separating each described minute scope to be carried out in the operation on the desirable scope the coating particles galvanic deposit.
7. the method that applies according to the galvanic deposit on wheel hub of claim 6, it is characterized in that, one in each process is following process, promptly, under cylindrical portion only is immersed in situation in the applying liquid in the applying liquid container that is housed in top band opening, make on the part of coating particles galvanic deposit in surface that contact with applying liquid, cylindrical portion.
8. the method that applies according to the galvanic deposit on wheel hub of claim 6, it is characterized in that, prepare a plurality of coating units, this coating unit is provided with the applying liquid container of the top end opening of accommodating applying liquid at least, in described each coating unit, for the selected coating unit of each process, and should be used to implement described process by selected coating unit.
9. the method that applies according to the galvanic deposit on wheel hub of claim 6, it is characterized in that, preparation is provided with applying liquid container of accommodating applying liquid and top end opening and coating unit of nozzle that applying liquid is upwards sprayed, and only carries out each step with this coating unit.
10. the method that applies according to the galvanic deposit on wheel hub of claim 9, it is characterized in that, the described relative position that is contained in the liquid level of the applying liquid in the applying liquid container, with the relative position of nozzle and wheel hub, and spray and to change for each step from the method for the applying liquid of this nozzle ejection.
11. method that galvanic deposit applies on wheel hub, it is characterized in that, in the surface that constitutes the unitary wheel hub of wheel support cage, galvanic deposit coating particles on the surface of cylindrical portion, on this surface, form undried coating thus, then, coating is baked on the surface of this cylindrical portion so that it is dry by heating this undried coating, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler, it is characterized in that
The Heating temperature of undried coating is lower than 140 ℃.
12. method that galvanic deposit applies on wheel hub, it is characterized in that, in the surface that constitutes the unitary wheel hub of wheel support cage, galvanic deposit coating particles on the surface of cylindrical portion, on this surface, form undried coating thus, then, coating is baked on the surface of this cylindrical portion so that it is dry by heating this undried coating, the described support cage unit of taking turns has on the part near the outer end of outer surface and is used to support and the mounting flange of fixing vehicle wheel and braking tumbler, the outer end have be used for outside at least one cylindrical portion of embedding wheel and braking tumbler, it is characterized in that
The Heating temperature of undried coating is at 140-220 ℃, and at wheel hub under the interior distolateral situation that is cooled, the operation of heating described undried coating.
CNA2005800481871A 2004-12-20 2005-12-19 Method of electrodepositing hub Pending CN101120121A (en)

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JP367107/2004 2004-12-20
JP2004367107A JP2006169608A (en) 2004-12-20 2004-12-20 Electrodeposition coating method for hub
JP376005/2004 2004-12-27
JP007118/2005 2005-01-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101940993A (en) * 2010-07-21 2011-01-12 浙江今飞凯达轮毂有限公司 Automobile hub spraying process
CN102284408A (en) * 2011-08-12 2011-12-21 中信戴卡轮毂制造股份有限公司 Improved wheel coating process
CN102284407A (en) * 2011-08-12 2011-12-21 中信戴卡轮毂制造股份有限公司 Silver-electroplating wheel coating process

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JP2009173099A (en) * 2008-01-23 2009-08-06 Ntn Corp Bearing device for wheel
WO2009122855A1 (en) * 2008-04-01 2009-10-08 Ntn株式会社 Bearing device for wheel, and axle module
CN102181894B (en) * 2011-04-02 2012-07-11 潘俊安 Device and method for carrying out single spraying on power battery case
DE102017116514A1 (en) 2017-07-21 2019-01-24 Schaeffler Technologies AG & Co. KG Wheel bearing assembly with a coating

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101940993A (en) * 2010-07-21 2011-01-12 浙江今飞凯达轮毂有限公司 Automobile hub spraying process
CN101940993B (en) * 2010-07-21 2013-06-12 浙江今飞凯达轮毂股份有限公司 Automobile hub spraying process
CN102284408A (en) * 2011-08-12 2011-12-21 中信戴卡轮毂制造股份有限公司 Improved wheel coating process
CN102284407A (en) * 2011-08-12 2011-12-21 中信戴卡轮毂制造股份有限公司 Silver-electroplating wheel coating process
CN102284407B (en) * 2011-08-12 2013-07-10 中信戴卡股份有限公司 Silver-electroplating wheel coating process
CN102284408B (en) * 2011-08-12 2013-07-10 中信戴卡股份有限公司 Improved wheel coating process

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