JP2002206542A - Electrolytic corrosion prevention bearing and method of manufacturing outer ring of the bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolytic corrosion prevention bearing free from the variation and nonuniformity of the film thickness of a ceramics thermally sprayed insulation layer and having an excellent dimensional accuracy, a rotating accuracy, and electric insulation performance and a method of manufacturing the outer ring thereof. SOLUTION: In this electrolytic corrosion prevention bearing having a ceramics thermally sprayed insulation layer 5 formed on the outer peripheral surface of an outer ring 2 through the width surface thereof, a reference surface 2a for grinding the outer peripheral surface and the width surface thereof is provided on the inner peripheral surface of the outer ring. The reference surface 2a may be a raceway track surface formed of a tapered surface, and may be a surface provided separately from the raceway track surface. Thus, when the width surface 5H and outer peripheral surface 5G of the outer ring 2 are ground after the insulation layer 5 is thermally sprayed, the outer ring 2 can be supported on the reference surface 2a provided on the inner peripheral surface thereof for grinding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing used for a main motor, a drive unit, an axle, etc. of a railway vehicle, and an electric current flows inside the bearing due to the structure of a device in which the bearing is incorporated. TECHNICAL FIELD The present invention relates to an anti-corrosion type bearing used for an application that needs to prevent the occurrence of corrosion, and a method of manufacturing an outer ring thereof.

[0002]

2. Description of the Related Art Conventionally, in the grinding of an outer ring 22 of a tapered roller bearing shown in FIG.
And then grinding the outer peripheral surface D using the width surfaces B and C as reference surfaces or centerless processing, and finally supporting the outer ring raceway surface while supporting the width surface B and the outer peripheral surface D as reference surfaces. E grinding is performed. This allows
A tapered roller bearing having good dimensional accuracy and rotational accuracy can be manufactured.

[0003] In contrast to such a normal tapered roller bearing, an anti-corrosion type tapered roller bearing used for an application that needs to prevent a current from flowing inside the bearing,
As shown in FIG. 10B, a ceramic material alone or a ceramic material and a metal material are sprayed on a plurality of layers on the width surfaces B and C and the outer peripheral surface D of the outer ring 22 in order to add electrical insulation. The insulating layer 25 is formed by coating.

[0004]

However, in the current thermal spraying technique, the thickness of the material to be thermal sprayed has a large variation and it is difficult to perform uniform thermal spraying. Accuracy and rotation accuracy are remarkably deteriorated, and the thickness deviation of the film thickness is increased. For this reason, the outer ring 22 after thermal spraying is used.
If the grinding of the width surfaces B and C and the outer peripheral surface D is performed in the same manner as the grinding of the outer ring in the case of the above-described ordinary tapered roller bearing, dimensional accuracy and rotational accuracy can be secured, It is difficult to perform the grinding process while suppressing the variation in the thickness of the insulating layer 25 which affects the insulating performance. Such a problem applies to a self-aligning roller bearing and a self-aligning ball bearing.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress variations in thickness and uneven thickness of a ceramic sprayed insulating layer provided from an outer peripheral surface to a width surface of an outer race, thereby achieving good dimensional accuracy, rotational accuracy, and the like.
Another object of the present invention is to provide an anti-corrosion type bearing capable of ensuring electrical insulation performance and a method of manufacturing an outer ring thereof.

[0006]

According to the present invention, there is provided an anti-corrosion type bearing in which a ceramic sprayed insulating layer is provided from an outer peripheral surface to a width surface of an outer ring fitted to a bearing housing. A reference surface for grinding the outer peripheral surface and the width surface is provided on the inner peripheral surface of the outer ring. According to this configuration, when grinding the width surface and the outer peripheral surface of the outer ring after the thermal spraying of the insulating layer, the outer ring can be supported and ground by the reference surface provided on the inner peripheral surface thereof. for that reason,
Even if the thickness of the insulating layer is uneven or uneven at the stage of spraying the ceramic sprayed insulating layer of the outer ring, the thickness of the insulating layer on the width and outer peripheral surfaces of the outer ring can be ground to the required size, which is good. An anti-corrosion bearing having excellent dimensional accuracy, rotational accuracy, and electrical insulation performance can be obtained. In addition,
This anti-corrosion bearing is a rolling bearing in which rolling elements are interposed between an inner ring and an outer ring.

In the present invention, when the anti-corrosion type bearing is a tapered roller bearing, the reference surface may be a tapered surface serving as an outer raceway surface. As described above, by using the outer ring raceway surface, which is a tapered surface, as the reference surface, accurate grinding can be performed in the tapered roller bearing without forming a special reference surface on the outer ring. For example, by supporting the outer ring with a support jig having a tapered outer peripheral surface fitted to the outer ring raceway surface, and performing grinding in this supported state, the outer ring raceway surface is used as a reference surface, and the thickness of the ceramic sprayed insulating layer is Can be ground to required dimensions.

In the present invention, the reference surface may be a cylindrical surface having the same central axis as the outer peripheral surface of the outer ring. In this case, the outer ring and the raceway surface may not have a cylindrical surface portion. In this case, the reference surface is provided separately from the raceway surface. In this way, by using the cylindrical surface having the same central axis as the outer peripheral surface of the outer ring as the reference surface, grinding is performed in a state where the outer ring is supported by the support jig having the cylindrical outer peripheral surface fitted to the cylindrical surface. Can be. Therefore, accurate grinding using the reference surface can be easily performed, and the thickness of the ceramic sprayed insulating layer can be ground to a required dimension.

In the present invention, when the reference surface is a cylindrical surface having the same central axis as the outer peripheral surface of the outer ring as described above, the anti-corrosion type bearing may be a tapered roller bearing. In this case, a reference surface composed of the cylindrical surface is formed at an end of the inner peripheral surface or the like separately from the raceway surface composed of the tapered surface of the outer ring.

In the present invention, when the reference surface is a cylindrical surface having the same central axis as the outer peripheral surface of the outer ring, the anti-corrosion type bearing may be a self-aligning bearing. The spherical bearing may be a spherical roller bearing or a spherical ball bearing. In this case, a reference surface composed of the cylindrical surface is formed at the end of the inner peripheral surface or the like separately from the spherical raceway surface of the outer ring.

A method of manufacturing a bearing outer ring according to a first invention method of the present invention is a method of manufacturing an outer ring in an anti-corrosion type bearing comprising a tapered roller bearing, wherein an inner peripheral surface is formed on a raceway surface of a tapered surface. By using a jig that fits on the raceway surface consisting of the tapered surface of the outer ring during the process and the process for manufacturing the outer ring during the process in which the ceramic sprayed insulating layer is provided from the outer peripheral surface to the width surface from the outer peripheral surface, Grinding the width surface and the outer diameter surface of the outer race in the above-mentioned machining process using the raceway surface as a reference surface. According to this method, since the outer raceway surface, which is a tapered surface, is used as the reference surface, highly accurate grinding can be performed in the tapered roller bearing without forming a special reference surface on the outer ring. Therefore, it is possible to grind the thickness of the ceramic sprayed insulating layer on the width and outer peripheral surfaces of the outer ring to the required dimensions by a simple method, and to provide an anti-corrosion tapered roller bearing with good dimensional accuracy, rotational accuracy, and electrical insulation performance. Can be manufactured.

A method of manufacturing a bearing outer ring according to a second invention method of the present invention is a method of manufacturing an outer ring in an anti-corrosion type bearing, wherein a raceway surface is formed on an inner peripheral surface and the same center as an outer peripheral surface. A process of manufacturing the outer ring during the machining process in which a reference surface composed of a cylindrical surface having an axis is formed on the inner periphery, and using a jig that engages with the reference surface, a width surface and an outer surface of the outer ring during the machining process are used. Performing a grinding process on the radial surface. According to this method, it is possible to support the outer ring in the process of machining with the cylindrical surface having the same central axis as the outer peripheral surface of the outer ring provided on the inner periphery of the outer ring as the reference surface, and to grind the width surface and the outer peripheral surface thereof. Therefore, the thickness of the ceramic sprayed insulating layer on the width surface and the outer peripheral surface of the outer ring can be ground to required dimensions, and an anti-corrosion bearing having good dimensional accuracy, rotational accuracy, and electrical insulation performance can be manufactured.

[0013]

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 2, this anti-corrosion type bearing has a rolling element 3 interposed between an inner ring 1 and an outer ring 2 which are race rings, as shown in FIG. A ceramic sprayed insulating layer 5 is provided from the outer peripheral surface to the width surface of the outer ring 2 fitted to the outer ring 2 (not shown). This bearing is used, for example, as a rotor support bearing in a main motor of a railway vehicle. This bearing is a tapered roller bearing, and the raceway surface 2a of the outer race 2 is a tapered surface.
The raceway surface 2a, which is a tapered surface, is used as a reference surface in the grinding of the ceramic sprayed insulating layer 5 described later. The rolling elements 3 are held in pockets of a holder 4. The base materials of the inner and outer rings 1 and 2 and the rolling elements 3 are made of a metal material such as bearing steel. The ceramic sprayed insulating layer 5 has, for example, a two-layer structure of a ceramic layer sprayed directly on a base material of the outer ring 2 and a metal layer sprayed over the ceramic layer. The outer peripheral surface 5G and the width surfaces 5H and 5I are ground to a predetermined film thickness after thermal spraying. The ceramic sprayed insulating layer 5 may be a three-layer sprayed layer of a metal layer, a ceramic layer, and a metal layer from the base material side of the outer ring 2 instead of the two-layer structure described above. It may be a layer. The metal layer on the outer layer side is a layer provided to prevent peeling at the time of tight fitting to the bearing box, and the metal layer on the inner layer side is a layer for improving the adhesion of the ceramic layer to the base material of the outer ring 2. is there.

FIG. 1 shows a step of grinding the outer ring 2 in the bearing. 1 (A) to 1 (D) show the steps before the ceramic sprayed insulating layer 5 is provided on the outer ring 2 during the working process, and FIGS. 1 (E) to 1 (G) show the ceramic sprayed insulating layer 5 provided. This is a later step.

In the preceding step, for example, as shown in FIG. 1 (A), the outer ring 2 is brought into contact with the small-diameter side width surface 2C on the reference board 6 so that the outer ring 2 is used as a reference surface. The large-diameter-side width surface 2B of the outer ring 2 is ground with a rotary grindstone 7A in this state. Next, FIG.
As shown in (B), the outer ring 2 is supported on the reference plate 6 using the large-diameter side width surface 2B as a reference surface, and the small-diameter side width surface 2C of the outer ring 2 is ground with the rotating grindstone 7B in this supported state. The width faces 2B and 2C are
Both sides may be ground simultaneously. In this manner, both width faces 2B, 2
After grinding C, the large-diameter-side width surface 2B of the outer ring 2 is brought into close contact with the magnet chuck 8 as shown in FIG.
The outer diameter surface 2D of the outer ring 2 is received by the shoe 9, and the outer diameter surface 2D is ground by the rotating grindstone 7B. The outer diameter surface 2D may be centerless processed. Next, while supporting the width surface 2B and the outer diameter surface 2D as reference surfaces as shown in FIG. 1 (D), the outer ring 2 is rotated by the magnet chuck 8, and the raceway surface 2a of the outer ring 2 which is a tapered surface is rotated by a rotating grindstone 7C. Grind with

In a post-process, which is a grinding process of the ceramic sprayed insulating layer 5, as shown in FIG. 1 (E), a support trap 10 having a conical trapezoid whose outer peripheral surface is a tapered surface having the same angle as the outer raceway surface 2a is used as a reference. The track 6 is provided on the board 6, and the raceway 2 a of the outer race 2 is fitted to the outer peripheral surface of the support jig 10. In other words, outer ring raceway surface 2
The outer ring 2 is supported by the support jig 10 with reference to a.
In this support state, the large-diameter side width surface 5H of the ceramic sprayed insulating layer 5 of the outer ring 2 is ground with the rotary grindstone 7A, and the ceramic sprayed insulating layer 5 on the wide surface is processed into a predetermined film thickness. Next, the large-diameter side width surface 5H ground in this manner is connected to the large-diameter side width surface 5H in FIG.
The outer ring 2 is supported by the reference plate 6 using the large-diameter side width surface 5H as a reference surface as described above. In this support state, the ceramic sprayed insulating layer 5 of the outer ring 2 is formed.
The small-diameter-side width surface 5I is ground with the rotary grindstone 7 to process the ceramic-sprayed insulating layer 5 on the width surface to a predetermined film thickness. After grinding both width surfaces 5H and 5I in this manner, the raceway surface 2a of the outer ring 2 is fitted to the outer peripheral surface of the above-mentioned conical trapezoidal support jig 10 provided on the magnet chuck 8 as shown in FIG. Next, the outer jig 2 is supported by the support jig 10 using the outer raceway surface 2a as a reference plane. The ceramic sprayed insulating layer 5
5G is received by the shoe 9. Thus, the outer ring 2 is rotated by the magnet chuck 8 while supporting the outer ring 2 with the outer ring raceway surface 2a and the outer peripheral surface 5G as reference surfaces, and the outer peripheral surface 5G of the ceramic sprayed insulating layer 5 is fixed to a predetermined thickness by the rotating grindstone 7B. Grinding. At this time, a pressing plate 12 is attached to the tip of the support jig 10 with a bolt 11,
The outer ring 2 is pressed against the large-diameter side of the support jig 10 by the pressing plate 12 so that the raceway surface 2 a of the outer ring 1 is brought into close contact with the outer peripheral surface of the conical trapezoidal support jig 10.

As described above, in this anti-corrosion type bearing, the outer ring 2
Since the ceramic sprayed insulating layer 5 described above is ground, it is possible to reduce the thickness variation and unevenness of the thickness of the ceramic sprayed insulating layer 5 provided from the outer peripheral surface of the outer race 2 to the width surface, and to process the ceramic sprayed insulating layer 5 to a required thickness. Thereby, an anti-corrosion type bearing having good dimensional accuracy, rotational accuracy, and electric insulation performance can be obtained.

FIG. 4 is a sectional view showing an outer ring 2 of an anti-corrosion type bearing according to another embodiment of the present invention. This anti-corrosion bearing is also a tapered roller bearing as in the previous embodiment. The provision of the ceramic sprayed insulating layer 5 from the outer peripheral surface to the width surface of the outer ring 2 and the structures of the inner ring, the rolling elements and the cage are the same as those of the previous embodiment, and the description thereof is omitted here. The raceway surface 2a of the outer race 2 is tapered as in the previous embodiment, but in this example, the ceramic sprayed insulating layer 5 is sprayed on the inner peripheral surface following the small-diameter side end of the raceway surface 2a. Prior to this, a cylindrical surface 2b having the same central axis O as the outer peripheral surface of the outer ring is formed. The cylindrical surface 2b serves as a reference surface when grinding the ceramic sprayed insulating layer 5, and its axial length is set to, for example, 10 mm or more.

FIG. 5 shows a step of grinding the ceramic sprayed insulating layer 5 of the outer ring 2 in the bearing of FIG. In this grinding, first, the outer ring 2 is supported by a support jig 10A installed on the magnet chuck 8 as shown in FIG. 5A, and the large-diameter side width surface 5H of the ceramic sprayed insulating layer 5 is pressed against the magnet chuck 8. Can be Supporting jig 10 in this case
A has a cylindrical shape having a cylindrical surface whose outer peripheral surface is engaged with a cylindrical surface 2b formed on the raceway surface 2a of the outer race 2. Note that the support jig 10A may be a plurality of members arranged in the circumferential direction. In the above-mentioned supporting state with the large-diameter side width surface 5H of the ceramic sprayed insulating layer 5 and the cylindrical surface 2b of the outer raceway surface 2a as reference surfaces, the small-diameter side width surface 5I of the ceramic sprayed insulating layer 5 is ground with a rotary grindstone 7A. The width of the ceramic sprayed insulating layer 5 is processed to a predetermined thickness. Next, the small-diameter side width surface 5I thus ground is brought into close contact with the reference plate 6 as shown in FIG.
The outer ring 2 is supported on the reference panel 6 with I as a reference plane. In this supporting state, the large-diameter side width surface 5H of the ceramic sprayed insulating layer 5 of the outer ring 2 is ground with a rotary grindstone 7A, and the ceramic sprayed insulating layer 5 on the wide surface is processed to a predetermined thickness. After grinding the width surfaces 5H and 5I in this manner, the cylindrical surface 2b of the raceway surface 2a of the outer race 2 is fitted to the outer peripheral surface of the support jig 10A provided on the magnet chuck 8 as shown in FIG. As a result, the outer ring 2 is supported by the support jig 10 </ b> A, and the outer peripheral surface 5 </ b> G of the ceramic sprayed insulating layer 5 is received by the shoe 9. Thus, the outer ring 2 is supported by the magnet chuck 8 and the shoe 9 with the cylindrical surface 2b of the raceway surface 2a, the large-diameter width surface 5H, and the outer peripheral surface 5G as reference surfaces. The outer peripheral surface 5G of the ceramic sprayed insulating layer 5 is ground with the rotating grindstone 7B while rotating the magnet chuck 8 so that O becomes the center of rotation.

As described above, in this anti-corrosion type bearing, the ceramic sprayed insulating layer 5 of the outer ring 2 is ground using the cylindrical surface 2b formed at the small diameter end of the tapered outer ring raceway surface 2a as a reference surface. Since it is processed, the ceramic sprayed insulating layer 5 provided from the outer peripheral surface to the width surface of the outer ring 2 can be processed to a required film thickness, and an anti-corrosion bearing having good dimensional accuracy, rotational accuracy, and electrical insulation performance is obtained. be able to.

FIG. 6 is a sectional view showing an outer ring 2 of an anti-corrosion type bearing according to still another embodiment of the present invention. This anti-corrosion type bearing is a bearing having no cylindrical surface portion on the raceway surface 2a of the outer race 2, such as a self-aligning roller bearing shown in FIG. 7 and a self-aligning ball bearing shown in FIG. As in the previous embodiment, the ceramic sprayed insulating layer 5 is provided from the outer peripheral surface of the outer ring 2 to the width surface. Further, at one end of the raceway surface 2a of the outer ring 2, at the stage before the ceramic sprayed insulating layer 5 is sprayed, as in the embodiment shown in FIG.
A cylindrical surface 2b having the same central axis O as the outer ring outer peripheral surface is formed. The cylindrical surface 2b in this case also serves as a reference surface when grinding the ceramic sprayed insulating layer 5, and its axial length is set to, for example, 10 mm or more.

Also in this case, the ceramic sprayed insulating layer 5 on the outer race 2 is ground in the same manner as the grinding in the previous embodiment shown in FIG. Since the ceramic sprayed insulating layer 5 of the outer ring 2 is ground using the cylindrical surface 2b formed at the end of the outer ring raceway surface 2a as a reference surface in this manner, the ceramic sprayed insulating layer provided from the outer peripheral surface of the outer ring 1 to the width surface is provided. 5 can be processed to the required film thickness,
An anti-corrosion bearing having good dimensional accuracy, rotational accuracy, and electrical insulation performance can be obtained.

FIG. 9 shows an embodiment in which the reference surface formed at one end of the outer raceway surface is a cylindrical surface 2c with a step, instead of the cylindrical surface 2b in the above embodiment. That is,
The stepped cylindrical surface 2c is a cylindrical surface having a large diameter on the outer ring width surface side and a small diameter on a portion closer to the inner side than the width surface. In the grinding of the ceramic sprayed insulating layer 5 on the outer ring 2 of the anti-corrosion bearing, the stepped cylindrical surface 2c
The outer ring 2 is supported by a cylindrical support jig having an outer peripheral surface that is a stepped cylindrical surface that fits into the ceramic sprayed insulating layer 5 in the same manner as in the previous embodiment. Grinding to thick dimensions is possible. Therefore, an anti-corrosion bearing having good dimensional accuracy, rotational accuracy, and electrical insulation performance can be obtained.

In each of the embodiments shown in FIGS.
The reason why the width of the cylindrical surface 2b is set to 10 mm or more is to suppress the inclination between the outer ring outer diameter surface 5G and the axis when the outer ring 2 is mounted on the jig 10A.

[0025]

According to the present invention, there is provided an anti-corrosion type bearing having a ceramic sprayed insulating layer extending from the outer peripheral surface to the width surface of the outer ring, the reference surface for grinding the outer peripheral surface and the width surface of the outer ring. Is provided on the inner peripheral surface of the outer ring, so that even when the insulating layer is sprayed on the width surface or the outer peripheral surface of the outer ring, the outer ring can be supported by the reference surface provided on the inner peripheral surface and ground. Therefore, even if the thickness of the insulating layer is uneven or uneven at the stage where the ceramic sprayed insulating layer of the outer ring is formed by thermal spraying, the thickness of the insulating layer on the width and outer peripheral surfaces of the outer ring can be processed to required dimensions, Good dimensional accuracy, rotational accuracy, and electrical insulation performance can be secured. In the case where the reference surface is a tapered surface serving as an outer ring raceway surface, in a tapered roller bearing, without forming a special reference surface on the outer ring, support of an outer peripheral surface which is a tapered surface fitted to the outer ring raceway surface By supporting the outer ring with a jig, the thickness of the ceramic sprayed insulating layer can be processed to a required size. When the reference surface is a cylindrical surface having the same central axis as the outer ring outer peripheral surface, the outer ring is supported by a support jig or the like for the cylindrical outer peripheral surface fitted to the cylindrical surface, thereby forming a ceramic sprayed insulating layer. Can be processed to required dimensions. A method of manufacturing a bearing outer ring according to a first invention method of the present invention is a method of manufacturing an outer ring in an anti-corrosion type bearing comprising a tapered roller bearing, wherein an inner peripheral surface is formed on a raceway surface having a tapered surface, The process of manufacturing the outer race in the process of processing provided with the ceramic sprayed insulating layer from the surface to the width surface, and the use of the jig to be fitted to the raceway surface consisting of the tapered surface of the outer race in the process, the above raceway surface With reference to
Grinding the width and outer diameter surfaces of the outer ring during the above-mentioned processing step, without forming a special reference surface on the outer ring, the thickness of the insulating layer on the width surface and the outer peripheral surface of the outer ring. Can be processed to required dimensions, and good dimensional accuracy, rotation accuracy, and electrical insulation performance can be secured. In the method for manufacturing a bearing outer ring according to the second invention method of the present invention, the raceway surface is formed on the inner peripheral surface, and the reference surface formed of a cylindrical surface having the same central axis as the outer peripheral surface is formed on the inner peripheral surface. Since the method includes a step of manufacturing the outer ring during the processing, and a step of performing a grinding process on the width surface and the outer diameter surface of the outer ring during the processing using the jig that is engaged with the reference surface, The thickness of the insulating layer on the width surface and the outer peripheral surface of the outer ring can be processed to required dimensions, and good dimensional accuracy, rotational accuracy, and electrical insulation performance can be secured.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an outer ring grinding process in an anti-corrosion bearing according to an embodiment of the present invention.

FIG. 2 is a sectional view of the anti-corrosion type bearing.

FIG. 3 is an enlarged sectional view of a main part of an outer race in the anti-corrosion type bearing.

FIG. 4 is a cross-sectional view of an outer race in an anti-corrosion bearing according to another embodiment of the present invention.

FIG. 5 is an explanatory diagram of a grinding process of an outer ring in the anti-corrosion type bearing.

FIG. 6 is a cross-sectional view of an outer race in an anti-corrosion bearing according to yet another embodiment of the present invention.

FIG. 7 is a sectional view of a self-aligning roller bearing as an example of the anti-corrosion type bearing.

FIG. 8 is a sectional view of a self-aligning ball bearing which is another example of the anti-corrosion type bearing.

FIG. 9 is an enlarged sectional view of a main part of an outer race in an anti-corrosion bearing according to still another embodiment of the present invention.

FIGS. 10A and 10B are explanatory diagrams of a conventional example.

[Explanation of symbols]

 2 outer ring 2a raceway surface (reference surface) 2b cylindrical surface (reference surface) 5 ceramic sprayed insulating layer 5G outer circumferential surface 5H, 5I width surface 10, 10A support jig

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomoatsu Murata 3066 Oyumida, O-Fuji, Kuwana-shi, Mie F-term in NTN Corporation (reference) 3C043 AA01 CC03 3J012 AB20 BB01 BB03 CB02 FB07 FB10 FB11 FB12 HB01 3J101 AA01 AA02 AA13 AA16 AA24 AA25 AA42 AA43 AA52 AA53 AA54 AA62 BA70 DA11 EA41 FA11 GA01 GA02 GA24

Claims (7)

[Claims] In an anti-corrosion type bearing provided with a ceramic sprayed insulating layer from the outer peripheral surface to the width surface of an outer ring fitted to a bearing housing, a reference surface for grinding the outer peripheral surface and the width surface of the outer ring is used as an outer ring. An anti-corrosion bearing provided on the inner peripheral surface. 2. The anti-corrosion type bearing according to claim 1, wherein the anti-erosion bearing is a tapered roller bearing, and the reference surface is a tapered surface serving as an outer raceway surface. 3. The anti-corrosion bearing according to claim 1, wherein the reference surface is a cylindrical surface having the same central axis as the outer peripheral surface of the outer ring. 4. The anti-corrosion type bearing according to claim 3, wherein the anti-corrosion type bearing is a tapered roller bearing. 5. The anti-corrosion bearing according to claim 3, wherein the anti-corrosion bearing is a self-aligning bearing. 6. A method of manufacturing an outer race in an anti-corrosion type bearing comprising a tapered roller bearing, wherein an inner peripheral surface is formed on a raceway surface of a tapered surface, and a ceramic sprayed insulating layer is provided from an outer peripheral surface to a width surface. The process of manufacturing the outer ring during the machining process, and by using a jig that is fitted to the raceway surface formed of the tapered surface of the outer ring during the machining process, the above-mentioned raceway surface is used as a reference surface, and A method of producing an outer race in an anti-corrosion bearing including a step of grinding a width surface and an outer diameter surface. 7. A method for manufacturing an outer race in an anti-corrosion bearing, wherein a raceway surface is formed on an inner peripheral surface and a reference surface formed of a cylindrical surface having the same central axis as the outer peripheral surface is formed on the inner peripheral surface. Electrolytic corrosion prevention including a process of manufacturing the outer ring during the machining process, and a process of grinding the width surface and the outer diameter surface of the outer ring during the machining process using a jig engaged with the reference surface. Method of manufacturing outer ring in die bearing.