JP5314181B1 - Sliding member, half sliding bearing using the same, and method for manufacturing half sliding bearing - Google Patents

Abstract

Provided are a sliding member that can be easily processed and ensured accuracy even when the size is increased, a half sliding bearing using the sliding member, and a method for manufacturing the half sliding bearing.
A plate-like sliding member 10 used in a half-shaped slide bearing. The sliding member 10 includes wide areas 11, 12, 13 and narrow areas 21, 22. The narrow area parts 21 and 22 are sandwiched between the wide area parts 11, 12, and 13, the overall length in the width direction is narrower than the wide area parts 11, 12, and 13, and the hardness is greater than that of the wide area parts 11, 12, and 13. high. When one end portion in the plate thickness direction is one end portion and the other end portion in the plate thickness direction is the other end portion, the narrow areas 21 and 22 are one end surfaces 211 and 221 exposed at one end portion, The other end side end surfaces 212 and 222 are provided. The other end side end surfaces 212 and 222 are exposed at the other end portion, and the exposed area is smaller than the one side end surfaces 211 and 221.
[Selection] Figure 1

Description

  The present invention relates to a sliding member, a half sliding bearing using the sliding member, and a method for manufacturing the half sliding bearing.

  2. Description of the Related Art Conventionally, large crosshead engines such as those for ships are provided with a crosshead bearing that supports the crosshead. The crosshead bearing is required to be increased in size as the output of the engine is improved, and to be improved in reliability and further in accuracy. A semi-cylindrical half bearing generally used for a crosshead bearing or the like is manufactured by bending a plate member into a cylindrical shape. This plate member has a back metal layer as a base material and a bearing alloy layer formed on the shaft side of the back metal layer.

  However, as described above, the plate member as a material increases in size with the increase in the size of the half bearing. Therefore, uniform lamination of the back metal layer and the bearing alloy layer on the plate member becomes difficult as the size increases. Further, there is a problem that the bending of the half bearing from the plate member becomes more difficult as the plate member to be processed becomes larger.

JP 2010-32055 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding member that can be easily processed and ensured accuracy even when the size is increased, a half sliding bearing using the sliding member, and a method for manufacturing the half sliding bearing.

  The sliding member of the present embodiment is a flat plate-shaped sliding member used for a half-shaped slide bearing. This sliding member is sandwiched between at least two or more wide area parts and the wide area part, and the overall length in the width direction is narrower than the wide area part, that is, the hard narrow area part having a higher hardness than the wide area part, It is equipped with. Then, when one end in the thickness direction is one end and the other end in the thickness direction is the other end, the narrow area includes the one end face exposed at the one end and the other And the other end face exposed at the end and having a smaller exposed area than the one end face. In the present embodiment, the width direction refers to a direction that proceeds with a wide area portion, a narrow area portion, and a wide area portion. When there are a plurality of narrow areas, the overall length in the width direction of each narrow area is narrower than the wide area where the overall length in the width direction is the narrowest. In the present embodiment, the hardness of the narrow area is harder than that of the wide area.

  Thus, the sliding member of the present embodiment has a flat plate shape and includes a narrow area between the wide areas. The narrow area is set to have higher hardness than the wide area. Therefore, the sliding member having the wide area portion and the narrow area portion has a boundary between the narrow area portion and the wide area portion having different hardnesses, that is, a portion having a discontinuity in hardness at both ends of the narrow area portion in the width direction. . Thereby, when bending a sliding member, this hardness discontinuous part deform | transforms as a fulcrum. And this narrow area part has the exposed area of the other side end surface smaller than the exposed area of the one side end surface in the thickness direction. It is desirable that the narrow portion has a total length in the width direction of the other side end surface that is narrower than a total length in the width direction of the one side end surface over the longitudinal direction. For this reason, the sliding member is bent so that the other end portion is on the inner side, thereby deforming the both ends of the narrow portion of the other end surface with a small exposed area as fulcrums. As a result, the deformation of the sliding member is facilitated, and fine adjustment of the curvature radius is facilitated when bending into a cylindrical shape. Therefore, even if the size is increased, the sliding member can be easily processed into a half-slide bearing, and the accuracy can be easily ensured. Further, by adopting a structure in which the narrow area portion is sandwiched between the wide area portions, a plurality of miniaturized plate members can be used as the material of the sliding member, and a large flat plate-shaped sliding member can be obtained. . Therefore, according to the above, even a sliding member for a large half-slide bearing can be easily formed.

Further, the sliding member of the present embodiment has a back metal layer having the wide area portion and the narrow area portion made of the same metal component, and the one end face is formed on the one end side, and the back metal layer And a bearing alloy layer positioned on the other end side.
When a sliding member having a bearing alloy layer on the other end side of the back metal layer is processed into a semi-cylindrical half-sliding bearing, the sliding member is bent so that the bearing alloy layer is on the inner peripheral side of the cylindrical shape. As described above, the sliding member is easy to finely adjust the curvature radius, and it is easy to ensure the accuracy of the shape. Therefore, when the processed half slide bearing is attached to the external housing, the half slide bearing and the housing are in close contact with each other. As a result, the half sliding bearing is reduced in deformation when attached to the housing. As a result, the half sliding bearing attached to the housing reduces local protrusion and deformation of the bearing alloy layer toward the shaft member that is a sliding target. Therefore, local contact with the shaft member is reduced, and wear and damage of the bearing alloy layer can be reduced. Further, the minute vibration between the half sliding bearing and the housing is reduced by reducing the deformation of the half sliding bearing. Therefore, damage caused by fretting caused by minute vibration is also reduced. An intermediate layer may be provided between the back metal layer and the bearing alloy layer.

In the sliding member of the present embodiment, the narrow area portion is provided on the back metal layer, and the bearing alloy layer is divided on the other end side of the narrow area portion.
As a result, when the bearing alloy layer divided on the other end side of the narrow area portion is bent into a half-sliding bearing, the deformation accompanying the bending is released at the divided portion. As a result, even if the sliding member is bent, the deformation of the bearing alloy layer is reduced. Therefore, local contact with the shaft member is reduced, and wear and damage of the bearing alloy layer can be reduced.

In the sliding member of the present embodiment, the shortest distance between adjacent divided bearing alloy layers, that is, the distance in the width direction is 0. 0 of the largest longest portion in the width direction perpendicular to the plate thickness direction in the narrow portion. It is preferably 5 to 1.8 times.
Moreover, in the sliding member of this embodiment, it is more preferable that the shortest distance between the separated bearing alloy layers, that is, the distance in the width direction is 1.0 to 1.8 times the longest portion.
Furthermore, in the sliding member of the present embodiment, the average hardness of the narrow area is 1.1 to 1.7 times the average hardness of the wide area, and the maximum hardness of the narrow area is The average hardness of the wide area is preferably 1.3 to 1.9 times.

In the sliding member of the present embodiment, the sum of the areas of the one end face in the narrow area is 1.3 to 9.0 times the sum of the areas of the other end face in the narrow area. preferable.
In the sliding member of this embodiment, it is preferable that the total length of the narrow area portion in the plate thickness direction is 0.60 to 0.95 times the plate thickness. Here, the total length of the narrow area in the thickness direction means the shortest distance between the one end face and the other end face in the narrow area.
In the sliding member of the present embodiment, the narrow portion has a maximum hardness, that is, a maximum hardness of 320 to 400 HV, and is 0.50 to 0.95 times the plate thickness from the one end face in the plate thickness direction. It is preferable that the hardest hardest part is located in the range.
The narrow area of the present embodiment has a trapezoidal shape in a plane perpendicular to the longitudinal direction of the narrow area, or a drum shape in which trapezoids are stacked symmetrically in the thickness direction.
Thereby, it is possible to easily ensure a difference in area between the one side end surface and the other side end surface.

The half plain bearing of this embodiment includes the above-described sliding member. The sliding member is formed from a flat plate shape to a semi-cylindrical shape so that the longitudinal direction of the narrow area portion is preferably within 10 ° of the axial direction, and between the wide area portions arranged in parallel in the circumferential direction, the axial direction The narrow portion extending in the direction is provided, the one end portion forming a radially outer peripheral surface, and the other end portion forming a radially inner peripheral surface.
As described above, in the half plain bearing of the present embodiment, one end surface is the outer peripheral surface side, and the other end surface is the inner peripheral surface side. And the wide area part is paralleled in the circumferential direction of a half slide bearing, and the narrow area part is pinched | interposed between this parallel wide area part. Therefore, this narrow area portion extends in the axial direction of the half slide bearing. Therefore, it is bent into a semi-cylindrical shape with both ends in the circumferential direction of the narrow portion extending in the axial direction as fulcrums, and this half-slide bearing is ensured with good accuracy.
The half plain bearing of this embodiment has a wide part and a narrow part made of the same metal component, and a back metal layer in which one end face is formed on one end side which is an outer peripheral surface side, and a back metal layer And a bearing alloy layer located on the other end side which is the inner peripheral surface side.

In the half slide bearing of the present embodiment, two or more narrow regions are provided in the circumferential direction.
Thereby, when bending a half-sliding bearing from a sliding member, a sliding member deform | transforms by using the both ends of the circumferential direction of two or more narrow areas as a fulcrum. Therefore, the half plain bearing is easily bent and the accuracy is easily ensured.

In the half plain bearing of the present embodiment, a groove extending in the axial direction is provided on the radially inner side of the narrow portion.
The groove extending in the axial direction can be used as a passage for a lubricant such as a lubricating oil for lubricating the half-slide bearing and the shaft member. Further, by forming a groove on the radially inner side of the narrow area, the bearing alloy layer can be divided on the inner side of the narrow area. In that case, when bending is performed, there is no bearing alloy layer on the radially inner side at both ends in the circumferential direction of the narrow region serving as a fulcrum of deformation. Therefore, useless deformation of the bearing alloy layer accompanying bending can be reduced, and accuracy can be easily ensured. It is possible to minimize the influence on the bearing alloy layer due to the manufacture of the half sliding bearing.

The flat plate-shaped sliding member manufacturing method according to the present embodiment includes a step of arranging two or more plate-like members, and a linear shape in a direction perpendicular to the plate thickness at a portion where the arranged plate-like members are in contact with each other. Performing a rapid heating and quenching process, and forming a narrow area part subjected to the rapid heating and quenching process and a wide area part sandwiching the narrow area part.
As a result, it is possible to manufacture a half-slide bearing that can be easily processed and ensure accuracy even when the size is increased.

In the method of manufacturing a half plain bearing according to the present embodiment, the rapid heating and quenching process includes a step of bending the plate-like member subjected to the rapid heating and quenching process into a semi-cylindrical shape in which the narrow portion extends in the axial direction. Is applied to the outer peripheral surface when bent into a semi-cylindrical shape.
Thereby, rapid heating rapid cooling processing is performed only from the one side end surface used as an outer peripheral surface. Therefore, rapid heating and rapid cooling processing can be performed only from one side in the plate thickness direction, and processing can be facilitated and man-hours can be reduced.

In the method for manufacturing a half plain bearing of the present embodiment, the plate-like member has a back metal layer and a bearing alloy layer, and when bent into a semi-cylindrical shape, the back metal layer is located on the outer peripheral side, The bearing alloy layer is located on the side.
As a result, the rapid heating and quenching process is performed from the back metal layer side. Therefore, deformation and damage of the bearing alloy layer accompanying rapid heating and rapid cooling can be reduced.
When manufacturing a half-sliding bearing, it is preferable that a bearing alloy layer is not present in the vicinity of the place where the rapid heating / cooling process is performed before the rapid heating / cooling process is performed. Thereby, the deformation | transformation and damage of the bearing alloy layer accompanying rapid heating rapid cooling process and bending process can be reduced easily.
An intermediate layer may be provided between the back metal layer and the bearing alloy layer. Moreover, after manufacturing the half slide bearing of this embodiment, you may provide the surface coating layer which consists of a metal or resin on the surface.
In the method for manufacturing a half plain bearing according to the present embodiment, the rapid heating and quenching process is a welding process for welding two or more plate-like members. Thereby, a wide area part and the narrow area part pinched | interposed between these wide area parts can be formed easily. The welding process is preferably performed by electron beam welding from the viewpoint of controlling the width and depth of welding.

The schematic diagram which shows the cross section of the sliding member by one Embodiment The schematic perspective view which shows the sliding member by one Embodiment 1 is an enlarged sectional view of III in FIG. The schematic perspective view which shows the half slide bearing using the sliding member by one Embodiment The schematic diagram which shows the manufacturing procedure of the sliding member by one Embodiment. Schematic showing the roundness of a half plain bearing according to one embodiment Schematic showing the roundness of the half plain bearing of the comparative example The figure equivalent to FIG. 3 of the sliding member by other embodiment The figure equivalent to FIG. 3 of the sliding member by other embodiment The figure equivalent to FIG. 3 of the sliding member by other embodiment The figure equivalent to FIG. 3 of the sliding member by other embodiment The figure equivalent to FIG. 3 of the sliding member by other embodiment The figure equivalent to FIG. 3 of the sliding member by other embodiment The figure equivalent to FIG. 3 of the sliding member by other embodiment

Hereinafter, embodiments of a sliding member and a half plain bearing using the sliding member will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the sliding member 10 includes wide areas 11, 12, 13 and narrow areas 21, 22. In the case of the example shown in FIGS. 1 and 2, the sliding member 10 includes three wide-area portions 11, 12, and 13. The sliding member 10 includes a narrow area portion 21 between the wide area section 11 and the wide area section 12 and a narrow area section 22 between the wide area section 12 and the wide area section 13. Thus, the sliding member 10 is provided with the narrow areas 21 and 22 between the adjacent wide areas 11, 12 and 13. Adjacent wide areas 11, 12, 13 are joined by narrow areas 21, 22 that have been subjected to rapid heating and quenching. In the case of this embodiment, the rapid heating rapid cooling process is a welding process. That is, the adjacent wide areas 11, 12, and 13 are joined by the narrow areas 21 and 22 by performing welding.

  When the width direction of the sliding member 10 is defined as shown in FIGS. 1 and 2, the width of the narrow areas 21 and 22 is set to be sufficiently narrow in the width direction compared to the wide areas 11, 12, and 13. Yes. Further, the narrow areas 21 and 22 are set to have higher hardness than the wide areas 11, 12 and 13. In this case, the average hardness of each of the narrow areas 21 and 22 is preferably set to 1.1 to 1.7 times the average of the average hardness of each of the wide areas 11, 12 and 13. The maximum hardness of each of the narrow areas 21 and 22 is preferably set to 1.3 to 1.9 times the average of the average hardness of each of the wide areas 11, 12 and 13.

  As shown in FIG. 1, the sliding member 10 defines one end in the thickness direction as one end and the other end as the other end. At this time, as shown in FIG. 1, the narrow area portion 21 has one end face 211 exposed at one end of the sliding member 10 and the other end face 212 exposed at the other end. Similarly, the narrow area 22 has a first side end surface 221 and a second side end surface 222. The other side end surfaces 212 and 222 of the narrow areas 21 and 22 are set to have a smaller exposed area than the one side end surfaces 211 and 221. That is, the narrow areas 21 and 22 are different in the area of the one side end surfaces 211 and 221 and the area of the other side end surfaces 212 and 222. Specifically, the sum of the areas of the one side end faces 211 and 221 in the narrow areas 21 and 22 is preferably set to 1.3 to 9.0 times the sum of the areas of the other side end faces 212 and 222. In the case of this embodiment, the adjacent wide area parts 11, 12, and 13 are joined by the narrow area parts 21 and 22 by welding. At this time, the welding process is performed from one end side in the plate thickness direction, specifically, from one end side. Therefore, the narrow areas 21 and 22 are formed in a trapezoidal shape whose width decreases from one end to the other end in a cross-sectional view as shown in FIG.

  The sliding member 10 has a backing metal layer 31 and a bearing alloy layer 32 that are laminated in the thickness direction as shown in FIGS. The back metal layer 31 is made of, for example, steel, and the wide areas 11, 12, 13 and the narrow areas 21, 22 are formed of the same metal component. The back metal layer 31 has an end face 41 at one end. The end surface 41 forms an end surface that is the same surface as the one side end surfaces 211, 221 of the narrow areas 21, 22. The bearing alloy layer 32 is laminated on the other end side of the back metal layer 31. The bearing alloy layer 32 is formed of, for example, a metal such as Al, Cu, Sn, or Ag, or an alloy obtained by adding various elements to these metals. In the case of the present embodiment, the bearing alloy layer 32 is divided at the other end side of the narrow regions 21 and 22. That is, the bearing alloy layer 32 is not laminated on the other end of the narrow areas 21 and 22.

  The shortest distance between the separated bearing alloy layers 32 is set with reference to the longest portion in the width direction of the narrow regions 21 and 22. The narrow area 21 will be described as an example with reference to FIG. The narrow area 22 is not illustrated and described, but is the same as the narrow area 21.

  As described above, the exposed area of the narrow area 21 is different between the one end face 211 and the other end face 212. Specifically, in the narrow area 21, the area of the one side end surface 211 is larger than that of the other side end surface 212. Therefore, the narrow portion 21 has a different width in the width direction perpendicular to the plate thickness direction. In other words, in the present embodiment, the width of the narrow area 21 tends to be larger as it is closer to the one side end surface 211 and smaller as it is closer to the other side end surface 212. The maximum width of the narrow portion 21 is defined as the longest portion Wm. The longest portion Wm is preferably 0.1 to 5.0% of the entire length of the sliding member 10 in the width direction for manufacturing a half-sliding bearing, and more preferably 0.5 to 2.0%. Since the bearing alloy layer 32 is divided at the other end portion side of the narrow area portion 21, a width direction interval D is formed at the other end portion side. At this time, the shortest distance between the separated bearing alloy layers 32, that is, the distance D is set to 0.5 to 1.8 times the longest portion Wm. In particular, the interval D between the bearing alloy layers 32 is preferably set to 1.0 to 1.8 times the longest portion Wm. Thus, since the bearing alloy layer 32 is divided on the other end side of the narrow area portion 21, the total length Ts of the narrow area portion 21 in the thickness direction is smaller than the overall plate thickness T of the sliding member 10. . At this time, the total length Ts of the narrow portion 21 in the plate thickness direction is set to 0.60 to 0.95 times the plate thickness T of the sliding member 10.

  The narrow areas 21 and 22 shown in FIG. 1 and FIG. In particular, when the narrow areas 21 and 22 are formed by welding from one end as in this embodiment, the narrow areas 21 and 22 are distributed in hardness in the thickness direction. In the case of this embodiment, the narrow areas 21 and 22 have a maximum hardness set to Hv 320 to 400. The portion having the maximum hardness in the narrow areas 21 and 22 is the hardest part. The hardest part is located in the range of 0.50 to 0.95 times the plate thickness T from the one side end surfaces 211 and 221 in the plate thickness direction.

Next, a half slide bearing using the sliding member 10 will be described.
As described above, the sliding member 10 is formed in a flat plate shape including a plurality of wide area portions 11, 12, 13 and narrow area portions 21, 22 sandwiched between the wide area portions 11, 12, 13. The sliding member 10 formed in a flat plate shape is formed in a half slide bearing 50 by processing it into a semi-cylindrical shape as shown in FIG. The half-slide bearing 50 is applied as a crosshead bearing for a large engine such as for ships. For example, the half-slide bearing 50 for such an application has an outer diameter of about 500 mm, an axial length of about 500 mm, and a thickness of about 15 mm. In the case of the present embodiment, the narrow areas 21 and 22 extend in parallel with the central axis of the semi-cylindrical half-sliding bearing 50. Thereby, the half-sliding bearing 50 of this embodiment is provided with the narrow areas 21 and 22 extending in the axial direction between the wide areas 11, 12, and 13 parallel in the circumferential direction. At this time, the half sliding bearing 50 is bent into a semi-cylindrical shape so that the bearing alloy layer 32 of the sliding member 10 is on the inner peripheral side. Therefore, the end surface 41 on the one end portion side of the sliding member 10 forms the outer peripheral surface of the half slide bearing 50. On the other hand, the surface of the bearing alloy layer 32 of the sliding member 10 forms the inner peripheral surface of the half slide bearing 50.

  As shown in FIGS. 1 and 2, in the case of the sliding member 10 having two narrow areas 21, 22 between the three wide areas 11, 12, 13, when processed into a half slide bearing 50, FIG. As shown in FIG. 2, two narrow regions 21 and 22 are provided in the circumferential direction. Thus, it is preferable to provide two or more narrow areas 21 and 22 in the circumferential direction. Further, when the bearing alloy layer 32 is divided on the other end side of the narrow area portions 21 and 22, when the sliding member 10 is processed into the half slide bearing 50, the half slide bearing 50 is converted into the narrow area portion 21, The grooves 51 and 52 extending in the axial direction are provided on the radially inner side of 22. The grooves 51 and 52 can be used as a passage for a lubricant that lubricates the sliding when the half-sliding bearing 50 and a shaft member (not shown) as a mating member slide.

Next, the manufacturing method of said sliding member 10 and the half slide bearing 50 is demonstrated based on FIG.
When manufacturing the sliding member 10, two or more rectangular plate-shaped members 60 are prepared first as shown in step (A). The plate-like member 60 is a so-called bimetal in which a back metal layer 61 and a bearing alloy layer 62 are laminated. In this embodiment, the back metal layer 61 is steel, and the bearing alloy layer 62 is an aluminum alloy. And the plate-shaped member 60 is shape | molded previously according to the dimension of the desired sliding member 10 and the half slide bearing 50, as shown to step (B). At this time, a part of the bearing alloy layer 62 can be removed. When the sliding member 10 is formed by removing a part of the bearing alloy layer 62, the bearing alloy layer 62 is divided at the other end portions of the narrow regions 21 and 22.

  The shaped plate-like members 60 are arranged adjacent to each other as shown in step (C). And the welding process by an electron beam is given to the part which this plate-shaped member 60 mutually adjoins, for example. The welding process is performed linearly so as to join adjacent plate-like members 60. The welding process is performed in one direction from the side corresponding to one end of the plate-like member 60, that is, from the back metal layer 61 side. At this time, the electron beam irradiated from one end side penetrates to the other end side of the back metal layer 61. Thereby, the three plate-like members 60 are joined to form the integral sliding member 10. In the sliding member 10, the welded portions are narrow regions 21 and 22, and the other portions are wide regions 11, 12, and 13. As described above, the bearing alloy layer 62 of the plate-like member 60 is divided at a position corresponding to the other end side of the narrow areas 21 and 22. Therefore, when welding is performed by irradiating an electron beam from one end, the bearing alloy layer 62 does not have a thermal influence during welding. As a result, the bearing alloy layer 62 can reduce changes in characteristics such as alteration.

  The formed sliding member 10 is processed into a half-cylindrical half-slide bearing 50 by bending. Specifically, the sliding member 10 is bent so that the narrow areas 21 and 22 shown in FIGS. 1 and 2 are parallel to the axis of the half slide bearing 50. At this time, the sliding member 10 is bent so that the bearing alloy layer 32 is on the inner peripheral side. As a result, as shown in FIG. 4, the half slide bearing 50 has a bearing alloy layer in which the back metal layer 31 having the one end face 211 formed on the outer peripheral side faces and is laminated on the inner metal side on the back metal layer 31. 32 faces. The sliding member 10 subjected to the bending process is subjected to necessary processes on the outer peripheral side and the inner peripheral side, and becomes a half-slide bearing as shown in FIG.

  As in the present embodiment, narrow areas 21 and 22 are provided between adjacent wide areas 11, 12, and 13. Therefore, when the joined sliding member 10 is processed into a cylindrical shape so that the narrow areas 21 and 22 are parallel to the axis, both ends of the narrow areas 21 and 22 serve as fulcrums in the circumferential direction. Specifically, in the case of the example shown in FIG. 3, the narrow area portion 21 sandwiched between the wide area section 11 and the wide area section 12 is a boundary section 71 and a boundary section 72 located at both ends in the circumferential direction. It joins with the wide area part 12, respectively. As described above, the wide areas 11 and 12 and the narrow area 21 are different in hardness. That is, a portion where the hardness is discontinuous is formed between the wide areas 11 and 12 and the narrow area 21. Therefore, the sliding member 10 is bent using the boundary portions 71 and 72 between the wide-area portions 11 and 12 and the narrow-area portion 21 where the hardness is discontinuous as fulcrums. At this time, the narrow area portion 21 has a narrower width on the other end side, which is the inner peripheral side, compared to the one end side. As a result, the sliding member 10 is easy to bend with the shorter distance in the width direction of the two boundary portions 71 and 72 as the bending center side, so that it is easy to finely control the curvature radius. As described above, the sliding member 10 according to the present embodiment can be easily processed into the semi-cylindrical half-sliding bearing 50 with high accuracy because minute control of the radius of curvature is facilitated.

  As shown in FIG. 6, the half-slide bearing 50 machined from the sliding member 10 of this embodiment had a roundness of the outer peripheral surface of 0.21 mm. The roundness was measured using a half slide bearing 50 having an outer diameter of 450 mm. The roundness indicates an error with respect to the perfect circle, and the roundness is higher as the numerical value is smaller. As a comparative example, a half-slide bearing using a conventional integral material had a roundness of 0.27 mm. This also shows that the sliding member 10 of this embodiment and the half-slide bearing 50 using the sliding member 10 have improved shape accuracy, particularly roundness, as compared with the prior art. Thus, when the half-slide bearing 50 with high shape accuracy is assembled to the housing of the crosshead bearing, rattling with the housing on the outer peripheral side is reduced. As a result, it is possible to reduce the occurrence of fretting between the half plain bearing 50 and the housing.

  Moreover, the sliding member 10 of this embodiment forms the narrow areas 21 and 22 by welding. Thereby, the narrow areas 21 and 22 can be hardened more easily than the wide areas 11, 12, and 13. Therefore, it is easy to make the hardness discontinuous at the boundary between the narrow areas 21, 22 and the wide areas 11, 12, 13, and the sliding member 10 is bent with the boundary as a fulcrum to form a semi-cylindrical shape. To be processed with high accuracy. When bending with the boundaries between the narrow areas 21, 22 and the wide areas 11, 12, 13 as fulcrums, the larger the difference in hardness between the narrow areas 21, 22 and the wide areas 11, 12, 13, the greater the bending There was a tendency to facilitate processing. On the other hand, when the difference in hardness between the narrow areas 21 and 22 and the wide areas 11, 12, and 13 becomes excessive, when the outer shape of the half slide bearing 50 is finally finished, a processing tool is used according to the hardness. Need to be replaced, and the versatility is reduced, or the life of the processing tool is reduced. Therefore, in the present embodiment, by setting the hardness of the narrow areas 21 and 22 to 1.1 to 1.9 times that of the wide areas 11, 12, and 13, the function as a fulcrum for bending due to the difference in hardness is achieved. Cutting can be performed with the same processing tool while ensuring. Therefore, the lifetime of the cutting tool can be extended while enhancing the versatility of the cutting tool such as a cutting tool.

  In the present embodiment, the interval D between the divided bearing alloy layers 32 is set to 0.5 to 1.8 times the longest portion Wm of the narrow regions 21 and 22. The area of the narrow areas 21 and 22 is set such that the sum of the one side end faces 211 and 221 is 1.3 to 9.0 times the sum of the other side end faces 212 and 222. Furthermore, the narrow areas 21 and 22 are set to have an average hardness 1.1 to 1.7 times the average of the average hardness of each of the wide areas 11, 12 and 13, and each maximum hardness is set to a wide area. The average hardness of each of the parts 11, 12, 13 is set to 1.3 to 1.9 times the average. By setting the distance D between the bearing alloy layers 32 divided as described above, the area ratio of the narrow regions 21 and 22, the ratio of the hardness of the narrow regions 21 and 22, and the like, the half-slide bearing 50 is provided. In addition to the shape accuracy, the shape accuracy in the grooves 51 and 52 formed on the inner peripheral side of the narrow areas 21 and 22 is maintained. That is, when the distance D between the bearing alloy layers 32, the area ratio of the narrow areas 21 and 22 and the hardness ratio of the narrow areas 21 and 22 are controlled to the set ranges, the sliding member 10 is processed into a semicylindrical shape. The halved plain bearing 50 can further improve the roundness. By suppressing unequal deformation in the narrow area 21, local contact between the processed half-slide bearing 50 and the outer housing is reduced. The local contact between the half-slide bearing 50 and the housing may be projected as irregularities on the inner peripheral surface formed by the bearing alloy layer 32. As a result, when local contact occurs between the half sliding bearing 50 and the housing, the sliding of the half sliding bearing 50 is caused by sliding between the half sliding bearing 50 and the cross head pin which is the counterpart member. The alloy layer 32 is locally fatigued and damaged. In the present embodiment, by defining the elements of the respective parts as described above, local contact between the half-slide bearing 50 and the housing, and accompanying damage due to back fretting of the half-slide bearing 50 and bearing alloy layers Local fatigue and damage can be reduced.

  In this embodiment, the total length Ts of the narrow areas 21 and 22 is set to 0.60 to 0.95 times the plate thickness T of the sliding member 10 and the half sliding bearing 50. In addition, the narrow areas 21 and 22 formed by welding have a maximum hardness of Hv320 to 400, and are within a range of 0.50 to 0.95 times the plate thickness T from the one end surface 211 in the plate thickness direction. The hardest part is located. The half sliding bearing 50 is repeatedly deformed under a dynamic load environment during use. In the present embodiment, the strength is maintained even when repeated deformation occurs by setting the overall length, hardness, and position of the hardest portion of the narrow areas 21 and 22 as described above. Therefore, durability can be maintained even in a high load environment.

(Other embodiments)
The present invention described above is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.
In the sliding member 10, the bearing alloy layer 32 may not be divided as shown in FIG. 8. In this case, the narrow portion 21 penetrates from the end surface of the back metal layer 31 to the end surface of the bearing alloy layer 32 in the plate thickness direction of the sliding member 10. Further, in the sliding member 10, the shape of the groove 51 formed by the bearing alloy layer 32 divided as shown in FIGS. 9 to 11 can be arbitrarily set as grooves 511, 512, and 513. Furthermore, the sliding member 10 may delete not only the bearing alloy layer 32 but also a part of the back metal layer 31. That is, in the case of the sliding member 10 shown in FIGS. 9 to 11, the groove 51 is formed not only in the bearing alloy layer 32 but also in a part of the back metal layer 31.

  As shown in FIG. 12, in the sliding member 10, the center of the groove 51 and the narrow portion 21 in the width direction may be shifted. Moreover, as shown in FIG. 13, as for the sliding member 10, the narrow area part 21 may incline with respect to a plate | board thickness direction, or may be bent. As described above, the narrow area 21 can arbitrarily set the relationship with the groove 51 and the relationship with the plate thickness direction.

  Furthermore, as shown in FIG. 14, the sliding member 10 may form the narrow portion 81 in a drum shape. In this case, the narrow area 81 is formed in a drum shape by performing welding from both ends in the plate thickness direction. The drum shape is a shape in which a trapezoid is overlapped in the thickness direction. That is, the narrow portion 81 is constricted between the one side end surface 811 and the other side end surface 812 in the plate thickness direction. In this way, even when the narrow area 81 is formed in a drum shape, the one side end surface 811 is set to have a larger exposed area, that is, a projected area in the thickness direction than the other side end surface 812. However, in view of improving the accuracy of bending and reducing the residual weld voids, welding is performed only from the outer peripheral side, and the shape of the surface perpendicular to the longitudinal direction of the narrow region is trapezoidal. The shape is preferred. Furthermore, it is more preferable that the center with respect to the width direction of the groove 51 and the narrow portion is aligned.

  In the embodiment described above, the example in which the sliding member 10 and the half plain bearing 50 are provided with the three wide areas 11, 12, 13 and the two narrow areas 21, 22 has been described. However, the sliding member 10 and the half slide bearing 50 can arbitrarily set the number of wide-area portions and narrow-area portions. Further, when a plurality of narrow regions are provided in the plurality of sliding members 10 and the half slide bearing 50, all of the plurality of narrow regions may be configured to satisfy the above-described condition, and at least of the plurality of narrow regions One may satisfy the above conditions.

  In the drawings, 10 is a sliding member, 11, 12 and 13 are wide areas, 21 and 22 are narrow areas, 31 and 61 are back metal layers, 32 and 62 are bearing alloy layers, 50 is a half plain bearing, 51, Reference numerals 511, 512, and 513 denote grooves, 60 denotes a plate-like member, 211, 221, and 811 denote one end face, and 212, 222, and 812 denote the other end face.

Claims (18)

A flat plate-shaped sliding member used for a half-shaped slide bearing,
At least two wide areas,
Sandwiched between the wide area parts, the overall length in the width direction is narrower than the wide area part, the narrow area part having a higher hardness than the wide area part,
When one end in the thickness direction is one end and the other end in the thickness direction is the other end,
The narrow area is
One end face exposed at the one end,
The other end face exposed at the other end, and having an exposed area smaller than the one end face ,
The overall length in the width direction of the other side end surface over the longitudinal direction is narrower than the overall length in the width direction of the one side end surface,
The sliding member whose maximum width is 0.1 to 5.0% of the total length in the width direction including the wide area portion and the narrow area portion . A back metal layer having the wide-area portion and the narrow-area portion made of the same metal component, wherein the one end face is formed on the one end side;
A bearing alloy layer located on the other end side of the back metal layer;
A sliding member according to claim 1. The narrow area portion is provided in the back metal layer,
The sliding member according to claim 2, wherein the bearing alloy layer is divided at the other end portion side of the narrow area portion.   The shortest distance between the adjacent bearing alloy layers that are divided is 0.5 to 1.8 times the largest longest portion in the width direction of the narrow portion perpendicular to the plate thickness direction in the narrow portion. The sliding member according to claim 3.   The sliding member according to claim 4, wherein the shortest distance between adjacent bearing alloy layers that are divided is 1.0 to 1.8 times the longest portion. The average hardness of the narrow area is 1.1 to 1.7 times the average hardness of the wide area,
The sliding member according to any one of claims 1 to 5, wherein a maximum hardness of the narrow portion is 1.3 to 1.9 times an average hardness of the wide portion.   7. The total area of the one end face in the narrow area is 1.3 to 9.0 times the total area of the other end face in the narrow area. The sliding member.   The sliding member according to any one of claims 1 to 7, wherein an overall length of the narrow area portion in a plate thickness direction is 0.60 to 0.95 times a plate thickness.   2. The narrowest portion has a maximum hardness of 320 to 400 HV, and the hardest hardest portion is located in a range of 0.50 to 0.95 times the plate thickness from the one end face in the plate thickness direction. The sliding member according to any one of 1 to 8.   The sliding member according to any one of claims 1 to 9, wherein the narrow portion has a trapezoidal shape in a plane perpendicular to the longitudinal direction of the narrow portion.   The sliding member according to any one of claims 1 to 9, wherein the narrow portion has a drum shape in which a shape of the narrow portion in a plane perpendicular to the longitudinal direction is formed by symmetrically overlapping trapezoids in a plate thickness direction. . A half-sliding bearing comprising the sliding member according to any one of claims 1 to 11,
The narrow portion extending in the axial direction is provided between the wide portions parallel in the circumferential direction,
The one end portion forms a radially outer peripheral surface, and the other end portion forms a radially inner circumferential surface.   The half-slide bearing according to claim 12, wherein two or more narrow regions are provided in the circumferential direction.   The half slide bearing according to claim 12 or 13, comprising a groove extending in the axial direction on the radially inner side of the narrow area portion. Arranging two or more plate-shaped members;
A narrow area subjected to rapid heating and quenching linearly in a direction perpendicular to the plate thickness at the portion where the plate-shaped members arranged are in contact, and a wide area sandwiching the narrow area Forming a part, and
The narrow area is
The overall length in the width direction of the other side end surface over the longitudinal direction is narrower than the overall length in the width direction of the one side end surface,
A flat plate-shaped sliding member having a maximum width of 0.1 to 5.0% of the entire length in the width direction including the wide area portion and the narrow area portion, and a half-slide bearing through a step of bending into a semicylindrical shape Manufacturing method.
Bending the plate-like member subjected to the rapid heating / cooling process into a semi-cylindrical shape in which the narrow portion extends in the axial direction;
The method of manufacturing a half-slide bearing using a sliding member according to claim 15, wherein the rapid heating and rapid cooling process is performed on a side that becomes an outer peripheral surface when bent into a semicylindrical shape.   The plate-like member has a back metal layer and a bearing alloy layer, and when bent into a semi-cylindrical shape, the back metal layer is located on the outer peripheral side and the bearing alloy layer is located on the inner peripheral side. 16. A method for producing a half plain bearing according to 16.   The method of manufacturing a half plain bearing according to any one of claims 15 to 17, wherein the rapid heating and rapid cooling process is a welding process of welding two or more plate-like members.

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