KR101355142B1 - Sliding member, semi-cylindrical sliding bearing using the same, and method of manufacturing the semi-cylindrical sliding bearing - Google Patents

Abstract

Provided are a sliding member that is easy to secure processing and accuracy even in a large size, a half sliding bearing using the same, and a method of manufacturing a half sliding bearing. It is a plate-like sliding member 10 used for a semi-cylindrical sliding bearing. The sliding member 10 is provided with the wide area parts 11, 12, 13, and the narrow part 21, 22. As shown in FIG. The narrow portion 21, 22 is sandwiched between the wide portions 11, 12, 13, and the overall length in the width direction is narrower than that of the wide portions 11, 12, 13, and the wide portions 11, 12, 13. Harder than) When one end in the plate thickness direction is called one end and the other end in the plate thickness direction is called the other end, the narrow portion 21, 22 is one side end surface 211 exposed at one end. 221 and the other end side cross sections 212 and 222. The other end side end surfaces 212 and 222 are exposed to the other end part, and an exposed area is smaller than the one end side end surfaces 211 and 221.

Description

Sliding member, half sliding bearing using the same, and manufacturing method of the half sliding bearing TECHNICAL FIELD

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

Background Art Conventionally, large crosshead engines, such as for ships, have a crosshead bearing for supporting the crosshead. The cross head bearing is required to be enlarged with the improvement of the output of the engine, and the improvement of the reliability and the improvement of the accuracy are further demanded. Generally, the semi-cylindrical half bearing used for a crosshead bearing etc. is manufactured by bending a plate member to cylindrical shape. This board member has the back metal layer used as a base material, and the bearing alloy layer formed in the axial side of this back metal layer.

However, as mentioned above, with the enlargement of the half bearing, the plate member used as a material becomes large. Therefore, uniform lamination of the back metal layer and the bearing alloy layer with respect to the plate member is becoming difficult as it is enlarged. In addition, the larger the size of the plate member to be processed, the more difficult the bending process of the half bearing from the plate member becomes.

Japanese Patent Laid-Open No. 2010-32055

Then, the objective of this invention is providing the sliding member which is easy to process and ensure the precision even if it enlarges, the half sliding bearing using this, and the manufacturing method of the half sliding bearing.

The sliding member of this embodiment is a flat sliding member used for a semi-cylindrical sliding bearing. The slidable member is sandwiched between at least two or more wide-area portions and the wide-area portion, and the overall length in the width direction is narrower than the wide-area portion, and the hardness is higher than that of the wide-area portion, that is, the tight narrow portion. Equipped. And when one end part in a plate | board thickness direction is called one end, and the other end part in a plate | board thickness direction is called another end part, the narrow part is one side end surface exposed to the said one end part, and It is exposed to the other end and has the other side end surface which is smaller in exposure area than the said one end surface. In this embodiment, a width direction means the direction which advances to a wide area part, a narrow part, and a wide area part. In the case where there are a plurality of narrowing portions, the total length of each narrowing portion in the width direction is narrower than that of the widest portion having the narrowest width portion. In the present embodiment, the hardness of the narrow portion is harder than that of the wide portion.

As described above, the sliding member of the present embodiment has a flat plate shape and includes a narrow portion between the wide regions. The narrow portion is set higher in hardness than the wide portion. Therefore, in the sliding member provided with a wide area | region and a narrow part, the part which is longitudinally discontinuous in the boundary of the narrow part and wide area | region with different hardness, ie, the narrow part in a width direction, is formed. Thereby, when bending a sliding member, this hardness discontinuous part becomes a support point and deform | transforms. And this narrowing part has the exposed area of the other side cross section smaller than the exposed area of the one side cross section in a plate thickness direction. It is preferable that the narrow part has the whole length of the width direction of the other side cross section narrower than the full length of the width direction of one side cross section over the longitudinal direction. For this reason, the sliding member is deformed by bending the other end to the inside, so that both ends of the narrow portion of the other end face having this small exposed area are used as the supporting point. As a result, deformation of the sliding member is facilitated, and fine adjustment of the radius of curvature is also facilitated when bending the cylindrical shape. Therefore, even if it is enlarged, it can be processed easily from a sliding member to a half sliding bearing, and it is easy to ensure the precision. Moreover, by making it the structure which sandwiched the narrow part between the wide area parts, it can be set as the sliding member of a large flat plate shape, using multiple plate members reduced in size as a material of a sliding member. Therefore, according to the above description, even a sliding member for a large half sliding bearing can be easily formed.

Moreover, the sliding member of this embodiment has the said wide area | region part and said narrow part which consist of the same metal component, The back metal layer in which the said one side end surface is formed in the said one end part, and the said other than said back metal layer And a bearing alloy layer located at the end side.

The sliding member provided with the bearing alloy layer on the other end side of a back metal layer is bent so that a bearing alloy layer may become a cylindrical inner peripheral side when it processes to the half cylinder half sliding bearing. As described above, the sliding member can be easily adjusted with a small radius of curvature, and it is easy to secure the accuracy of the shape. Therefore, when the processed half sliding bearing is attached to the outer housing, the half sliding bearing and the housing closely contact each other. As a result, the deformation | transformation at the time of attaching the half sliding bearing to a housing | casing is reduced. Thereby, the local sliding and deformation | transformation to the side of the shaft member used as the sliding object of a bearing alloy layer are reduced for the half sliding bearing attached to the housing. Therefore, local contact with the shaft member is reduced, and wear and damage to the bearing alloy layer can be reduced. In addition, as the deformation of the half sliding bearing is reduced, a slight vibration between the half sliding bearing and the housing is reduced. Therefore, damage due to fretting due to the slight vibration is also reduced. An intermediate layer may be formed between the back metal layer and the bearing alloy layer.

In the sliding member of this embodiment, the said narrowing part is provided in the said back metal layer, and the said bearing alloy layer is divided by the said other end side of the said narrowing part.

Thereby, the bearing alloy layer divided by the other end side of a narrow part is released in the part by which the deformation | transformation by bending is divided, when bending a sliding member to a half sliding bearing. As a result, even if the sliding member is bent, the deformation of the bearing alloy layer is small. Therefore, local contact with the shaft member is reduced, and wear and damage to the bearing alloy layer can be reduced.

In the sliding member of this embodiment, the shortest distance of the space | interval of the adjacent bearing alloy layer segmented, ie, the width direction distance, is the largest maximum in the width direction of the said narrowing part perpendicular | vertical to the plate | board thickness direction in the said narrowing part. It is preferable that it is 0.5-1.8 times of length part.

Moreover, in the sliding member of this embodiment, it is preferable that the shortest distance of the space | interval of the adjacent bearing alloy layer segmented, ie, the width direction distance, is 1.0-1.8 times of the said maximum length part.

Moreover, in the sliding member of this embodiment, it is preferable that the average hardness of the said narrow part is 1.1-1.7 times the average hardness of the said wide area, and the maximum hardness of the said narrow area is 1.3-1.9 times the average hardness of the said wide area. Do.

In the sliding member of this embodiment, it is preferable that the sum total of the area of the said one side cross section in the said narrowing part is 1.3 to 9.0 times the sum total of the area of the said other side cross section in the said narrowing part.

In the sliding member of this embodiment, it is preferable that the total length of the said narrowing part in a plate | board thickness direction is 0.60-0.95 times of plate | board thickness. Here, the full length of the narrow part in a plate | board thickness direction means the shortest distance of the one side cross section and the other side cross section in this narrow part.

In the sliding member of the present embodiment, the narrowing part has a maximum hardness, that is, a maximum hardness of 320 to 400 HV, and the maximum hardness that is the hardest in the range of 0.50 to 0.95 times the plate thickness from the one side end face in the plate thickness direction. It is preferable that the additional position is located.

In the sliding member of this embodiment, the said narrowing part is a book shape in which the shape in the surface perpendicular | vertical to the longitudinal direction of this narrowing part symmetrically trapped the trapezoid in the trapezoidal shape or the plate | board thickness direction.

Thereby, it is easy to ensure the difference in area between the one end surface and the other end surface.

The half sliding bearing of this embodiment is provided with the sliding member mentioned above. The sliding member is formed in a flat cylindrical shape to a semi-cylindrical shape such that the longitudinal direction of the narrow portion is within 10 degrees of the axial direction, and the narrow member extends in the axial direction between the wide-area portions parallel to the circumferential direction. The reverse portion is provided, the one end forms the outer peripheral surface of the radially outer side, and the other end forms the inner peripheral surface of the radially inner side.

Thus, in the half sliding bearing of this embodiment, one side end surface becomes an outer peripheral surface side, and the other side end surface becomes an inner peripheral surface side. And the wide area part is parallel in the circumferential direction of the half sliding bearing, and the narrow area part is sandwiched between these parallel wide area parts. Therefore, this narrow part extends in the axial direction of a half sliding bearing. Therefore, bending is carried out in the semi-cylindrical shape by using both ends of the circumferential direction of the narrow part extended in an axial direction as a support point, and this half sliding bearing ensures the favorable precision.

The half sliding bearing of this embodiment has a wide metal part and a narrow part which consist of the same metal component, and the back metal layer in which one side end surface is formed in the one end part side which is an outer peripheral surface side, and the other end side which is an inner peripheral surface side rather than a back metal layer It can be provided with the bearing alloy layer located.

In the half sliding bearing of this embodiment, two or more said narrowing parts are provided in the circumferential direction.

Thereby, when bending a half sliding bearing from a sliding member, a sliding member deform | transforms both ends of the circumferential direction of two or more narrowing parts as a support point. Therefore, while the half sliding bearing is easily bent, the precision is easily ensured.

In the half sliding bearing of this embodiment, the groove extended in an axial direction is provided in the radial direction inner side of the said narrowing part.

The groove extending in the axial direction can be a passage for lubricating oil such as lubricating oil for lubricating the half sliding bearing and the shaft member. Moreover, by forming a groove in the radially inner side of the narrowing portion, the bearing alloy layer can be divided inside the narrowing portion. In that case, at the time of a bending process, a bearing alloy layer does not exist inside radial direction in the both ends of the circumferential direction of the narrow part used as a support point of a deformation | transformation. Therefore, useless deformation of the bearing alloy layer due to bending can be reduced, and accuracy can be easily secured. The influence on the bearing alloy layer according to the manufacture of the half sliding bearing can be minimized.

The manufacturing method of the flat plate-shaped sliding member of this embodiment includes the process of arranging two or more plate-shaped members, and the rapid heating and quenching process linearly in the direction perpendicular | vertical to plate thickness in the part which the said plate-shaped members contact | connected. And forming a narrow portion that has been subjected to rapid heating and quenching, and a wide portion sandwiching the narrow portion.

Thereby, even if it enlarges, it can manufacture the half sliding bearing which is easy to process and ensure the precision.

The manufacturing method of the half sliding bearing of this embodiment includes the process of bending the said plate-shaped member by which the rapid heating quenching process was performed to the semicylindrical shape by which the said narrowing part extends in an axial direction, The said rapid heating quenching process When it bends to a semi-cylindrical shape, it performs on the side used as an outer peripheral surface.

Thereby, rapid heating quenching process is performed only from one side end surface used as an outer peripheral surface. Therefore, a rapid heating quenching process can be performed only from one of the plate | board thickness directions, and processing can be easy and reduction of the number of processes can be aimed at.

In the manufacturing method of the half sliding bearing of this embodiment, when the said plate-shaped member has a back metal layer and a bearing alloy layer, when it is bent in semi-cylindrical shape, the said back metal layer is located in the outer peripheral side, The bearing alloy layer is located on the side.

Thereby, it is from the back metal layer side that rapid heating quenching process is performed. Therefore, deformation and damage to the bearing alloy layer due to rapid heating and quenching can be reduced.

In the case of manufacturing the half sliding bearing, it is preferable to leave the bearing alloy layer in the vicinity of the point where the rapid heating quenching is performed before performing the rapid heating quenching. Thereby, the deformation | transformation and damage of the bearing alloy layer by rapid heating quenching 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 sliding bearing of this embodiment, you may form the surface coating layer which consists of a metal and resin on the surface.

In the manufacturing method of the half sliding bearing of this embodiment, the said rapid heating quenching process is a welding process which welds two or more said plate-shaped members. This makes it possible to easily form the narrow section sandwiched between the wide section and the wide section. It is preferable to perform welding by electron beam welding from the surface of the control of the width and depth of welding.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the cross section of the sliding member which concerns on one Embodiment.
2 is a schematic perspective view showing a sliding member according to one embodiment.
3 is an enlarged cross-sectional view of III of FIG. 1.
4 is a schematic perspective view illustrating a half sliding bearing using a sliding member according to one embodiment.
5 is a schematic view showing a manufacturing procedure of the sliding member according to the embodiment.
FIG. 6 is a schematic view showing roundness of a half sliding bearing according to one embodiment. FIG.
7 is a schematic diagram showing a roundness of a half sliding bearing of a comparative example.
FIG. 8 is a view corresponding to FIG. 3 of a sliding member according to another embodiment. FIG.
9 is a view corresponding to FIG. 3 of a sliding member according to another embodiment.
10 is a view corresponding to FIG. 3 of a sliding member according to another embodiment.
FIG. 11 is a view corresponding to FIG. 3 of a sliding member according to another embodiment. FIG.
FIG. 12 is a view corresponding to FIG. 3 of a sliding member according to another embodiment. FIG.
It is a figure corresponding to FIG. 3 of the sliding member which concerns on other embodiment.
14 is a view corresponding to FIG. 3 of a sliding member according to another embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of a sliding member and the half sliding bearing using this is demonstrated based on drawing. As shown to FIG. 1 and FIG. 2, the sliding member 10 is equipped with the wide area part 11, 12, 13, and the narrow part 21, 22. As shown in FIG. In the case of the example shown to FIG. 1 and FIG. 2, the sliding member 10 is equipped with three wide area parts 11, 12, and 13. As shown in FIG. The sliding member 10 includes a narrow section 21 between the wide section 11 and the wide section 12, and a narrow section 22 between the wide section 12 and the wide section 13. have. As described above, the sliding member 10 is provided with narrow portions 21 and 22 between adjacent wide regions 11, 12 and 13. The adjacent wide area parts 11, 12, 13 are joined by the narrow area parts 21 and 22 in which the rapid heating and quenching process were performed. In the case of this embodiment, a rapid heating quenching process is a welding process. That is, the adjacent wide area parts 11, 12, 13 are joined by the narrow part 21, 22 by performing a welding process.

When the width direction of the sliding member 10 is defined as shown in FIGS. 1 and 2, the widths of the narrow parts 21 and 22 are set sufficiently narrow in the width direction as compared with the wide areas 11, 12 and 13. have. Further, the narrower portions 21 and 22 are set to have a higher hardness than the wider portions 11, 12 and 13. In this case, it is preferable to set the average hardness of each of the narrow parts 21 and 22 to 1.1 to 1.7 times the average of the average hardness of each of the wide areas 11, 12 and 13. And it is preferable to set the maximum hardness of each narrow part 21, 22 to 1.3-1.9 times the average of the average hardness of each of the wide area parts 11, 12, and 13.

As illustrated in FIG. 1, the sliding member 10 defines one end of the sheet thickness direction as one end and defines the other end as the other end. At this time, the narrow portion 21 has one side 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 narrowing part 22 has one side end surface 221 and the other side end surface 222. The other end surface 212,222 of the narrow part 21,22 is set smaller than the one side surface 211,221. That is, the narrow part 21, 22 differs in the area of one side end surface 211, 221 from the area of the other side end surface 212, 222. Specifically, it is preferable to set the total sum of the areas of one side end surfaces 211 and 221 in the narrow areas 21 and 22 to 1.3 to 9.0 times the sum of the sum of the areas of the other end faces 212 and 222. Do. In the case of this embodiment, neighboring wide area parts 11, 12, and 13 are joined by narrow part 21 and 22 by welding process. At this time, welding is performed from one end side, specifically, one end side in the plate | board thickness direction. Therefore, the narrow portion 21 and 22 are formed in trapezoidal shape whose width | variety decreases from one end part to the other end part in the cross-sectional view as shown in FIG.

The sliding member 10 has the back metal layer 31 and the bearing alloy layer 32 laminated | stacked in the plate | board thickness direction as shown to FIG. 1 and FIG. The back metal layer 31 is formed of steel etc., for example, and the wide area parts 11, 12, 13, and the narrow part 21, 22 are formed with the same metal component. The back metal layer 31 has an end face 41 formed at one end thereof. This end surface 41 forms the cross section used as the same surface as the one side end surface 211 and 221 of the narrowing part 21 and 22. As shown in FIG. 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 metal, such as Al, Cu, Sn, Ag, or the alloy which added various elements to these metals, for example. In the case of this embodiment, the bearing alloy layer 32 is segmented at the other end side of the narrowing part 21 and 22. As shown in FIG. That is, the bearing alloy layer 32 is not laminated | stacked on the other end of the narrow part 21,22.

The shortest distance of the space | interval of this divided bearing alloy layer 32 is set based on the maximum length part in the width direction of the narrowing part 21 and 22. As shown in FIG. 3, the narrow part 21 is demonstrated as an example. In addition, although it does not show and demonstrate about the narrowing part 22, it is the same as the narrowing part 21. As shown in FIG.

As described above, the narrow portion 21 has a different exposed area at one side end face 211 and the other end face 212. Specifically, the narrow portion 21 has an area of one side end face 211 larger than the other side end face 212. Therefore, the width | variety of the narrow part 21 differs in the width direction perpendicular | vertical to the plate | board thickness direction. That is, in this embodiment, the width | variety of the narrowing part 21 tends to become large so that it is closer to the one side end surface 211, and becomes smaller as it becomes closer to the other side end surface 212. The maximum width in this narrow portion 21 is defined as the maximum length Wm. The maximum length Wm is preferably 0.1 to 5.0% of the total length in the width direction of the sliding member 10 in producing the half sliding bearing, and more preferably 0.5 to 2.0%. Since the bearing alloy layer 32 is divided by the other end side of the narrow part 21, the gap D of the width direction is formed in the other end side. At this time, the shortest distance of the space | interval of the adjacent bearing alloy layer 32 which is segmented, ie, the space | interval D, is set to 0.5 to 1.8 times this maximum length part Wm. In particular, the spacing D of the bearing alloy layer 32 is preferably set to 1.0 to 1.8 times the maximum length Wm. Thus, since the bearing alloy layer 32 is divided by the other end side of the narrow part 21, the total length Ts of the narrow part 21 in the plate | board thickness direction is the board thickness of the whole sliding member 10. As shown in FIG. Less than T 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.

In the narrow portion 21 and 22 shown in FIG. 1 and FIG. 2, the hardness may vary with a place. In particular, when the narrow portion 21, 22 is formed by performing a welding process from one end as in the present embodiment, the narrow portion 21, 22 generates a distribution with hardness in the plate thickness direction. In the case of the present embodiment, the narrowest portions 21 and 22 have the maximum hardness set to Hv320 to 400. The part which becomes the largest hardness in the narrow part 21 and 22 is a maximum hardness part. This maximum hardness part is located in the range of 0.50-0.95 times the plate | board thickness T from one side end surface 211, 221 in a plate | board thickness direction.

Next, the half sliding bearing using the sliding member 10 will be described.

As described above, the sliding member 10 includes a plurality of wide-area portions 11, 12, 13 and narrow-area portions 21, 22 fitted to the wide-area portions 11, 12, 13. Is formed. The sliding member 10 formed in this flat plate shape is formed in the half sliding bearing 50 by processing to semi-cylindrical shape as shown in FIG. The half sliding bearing 50 is applied as a crosshead bearing of a large engine, such as for ships. The half sliding bearing 50 for this use is set to about 500 mm in outer diameter, about 500 mm in total length in the axial direction, and about 15 mm in thickness. In the case of this embodiment, the narrowing parts 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 narrowing parts 21 and 22 extended in an axial direction between the wide area parts 11, 12, and 13 parallel in a circumferential direction. At this time, the half sliding bearing 50 is bent in a semi-cylindrical shape such that the bearing alloy layer 32 of the sliding member 10 becomes the inner circumferential side. Therefore, the end surface 41 of the one end side of the sliding member 10 forms the outer peripheral surface of the half sliding bearing 50. As shown in FIG. 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 sliding bearing 50.

As shown in FIG. 1 and FIG. 2, in the case of the sliding member 10 provided with the two narrow parts 21 and 22 between three wide parts 11, 12, and 13, the half sliding bearing 50 When processing, as shown in FIG. 4, two narrow part 21 and 22 are provided in the circumferential direction. Thus, it is preferable to provide two or more narrowing parts 21 and 22 in a circumferential direction. In addition, when the bearing alloy layer 32 is divided at the other end side of the narrow part 21, 22, when the sliding member 10 is processed to the half sliding bearing 50, the half sliding bearing 50 will narrow. The grooves 51 and 52 extending in the axial direction are provided in the radially inner side of the reverse portions 21 and 22. These grooves 51 and 52 can be used as a passage for a lubricant for lubricating the sliding when the half sliding bearing 50 and the shaft member (not shown) serving as the mating member slide.

Next, the manufacturing method of said sliding member 10 and the half sliding bearing 50 is demonstrated based on FIG.

When manufacturing the sliding member 10, as shown in step (A), two or more rectangular plate-shaped members 60 are prepared first. This plate-shaped member 60 is what is called bimetal in which the back metal layer 61 and the bearing alloy layer 62 were laminated | stacked. In the case of this embodiment, the back metal layer 61 is steel, and the bearing alloy layer 62 is aluminum alloy. And the plate-shaped member 60 is previously shaped according to the dimension of the desired sliding member 10 and the half sliding bearing 50, as shown to step (B). At this time, a part of the bearing alloy layer 62 may be removed. By removing a part of the bearing alloy layer 62, when the sliding member 10 is formed, the bearing alloy layer 62 is divided on the other end side of the narrow portions 21 and 22.

The plate-shaped members 60 are arranged so as to be adjacent to each other as shown in step (C). And the welding process by an electron beam, for example is performed in the part which this plate-shaped member 60 adjoins each other. Welding process is performed in linear form so that the adjacent plate-shaped member 60 may be joined. Welding process is performed in one direction from the side corresponded to the one end part of the plate-shaped member 60, ie, 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. As a result, the three plate members 60 are joined to form an integrated sliding member 10. In this sliding member 10, the welded part becomes the narrow part 21, 22, and the other part becomes the wide area part 11, 12, 13. As above-mentioned, the bearing alloy layer 62 of the plate-shaped member 60 is segmented in the position corresponded to the other end side of the narrow part 21,22. Therefore, when welding is performed by irradiating an electron beam from one end side, the bearing alloy layer 62 does not have a thermal effect at the time of welding. As a result, the bearing alloy layer 62 can reduce changes in characteristics such as alteration.

The formed sliding member 10 is processed by the semi-cylindrical half sliding bearing 50 by a bending process. Specifically, the sliding member 10 is bent so that the narrow parts 21 and 22 shown in FIG. 1 and FIG. 2 may become parallel to the axis of the half sliding bearing 50. In addition, at this time, the sliding member 10 is bent so that the bearing alloy layer 32 may become an inner peripheral side. As a result, as shown in FIG. 4, the half sliding bearing 50 faces the back metal layer 31 in which the one side end surface 211 is formed in the outer peripheral side, and the back metal layer 31 in the inner peripheral side. The bearing alloy layer 32 laminated on the surface faces. As for the sliding member 10 to which the bending process was given, the process required by the outer peripheral side and the inner peripheral side is performed, and it becomes a half sliding bearing as shown in FIG.

Narrow area 21, 22 is provided between neighboring wide area parts 11, 12, and 13 like this embodiment. Therefore, when processing the joined sliding member 10 in cylindrical shape so that the narrowing parts 21 and 22 may become parallel to an axis | shaft, the both ends of the narrowing parts 21 and 22 become a support point in the circumferential direction. Specifically, in the case of the example shown in FIG. 3, the narrow section 21 sandwiched between the wide section 11 and the wide section 12 is a wide section at the boundary 71 and the boundary 72 positioned at both ends in the circumferential direction. It is joined to the part 11 and the wide area part 12, respectively. As described above, the wide sections 11 and 12 and the narrow section 21 have different hardness from each other. That is, between the wide parts 11 and 12 and the narrow part 21, the part where the hardness is discontinuous is formed. Therefore, the sliding member 10 is bent by using the boundary portions 71 and 72 of the wide-area portions 11 and 12 where the hardness is discontinuous and the narrow portions 71 and 72 as the supporting points. At this time, the narrow end portion 21 has a narrower width than the other end side, which is the inner circumferential side. As a result, since the sliding member 10 becomes easy to bend in the width direction of the two boundary parts 71 and 72 as the bending center side, fine control of the radius of curvature becomes easy. As described above, the sliding member 10 of the present embodiment can be processed to the half-cylinder half-sliding bearing 50 with high accuracy because fine control of the radius of curvature becomes easy.

As shown in FIG. 6, the roundness of the outer peripheral surface of the half sliding bearing 50 processed from the sliding member 10 of this embodiment was 0.21 mm. Roundness was measured using the half sliding bearing 50 whose outer diameter is 450 mm. Roundness represents the error for a complete circle, and the smaller the value, the higher the roundness. As a comparative example, the half-sliding bearing using the conventional one-piece material had a roundness of 0.27 mm. Also from this, it turns out that the sliding member 10 of this embodiment and the half sliding bearing 50 using this sliding member 10 have improved shape precision, especially roundness compared with the past. When the half sliding bearing 50 having high shape accuracy is assembled to the housing of the cross head bearing, the one-sided contact and the rattling with the housing are reduced on the outer circumferential side. As a result, the occurrence of fretting between the half sliding bearing 50 and the housing can be reduced.

Moreover, the sliding member 10 of this embodiment forms the narrow part 21 and 22 by welding. As a result, the narrower portions 21 and 22 can be more firmly firmer than the wider portions 11, 12 and 13. Therefore, it is easy to make the hardness discontinuous at the boundary portion between the narrow portions 21 and 22 and the wide portions 11, 12 and 13, and the sliding member 10 is bent at the boundary portion as a supporting point to make the semi-cylinder The shape is processed with good precision. In the case where the boundary between the narrow portion 21, 22 and the wide portion 11, 12, 13 is bent as a supporting point, the difference in hardness between the narrow portion 21, 22 and the wide portion 11, 12, 13 There was a tendency that the larger the bending process became easier. On the other hand, if the difference between the hardness of the narrow portion 21, 22 and the wide portion 11, 12, 13 becomes excessive, when processing the external shape of the half sliding bearing 50 finally, the machining mechanism is changed according to the hardness. It may be necessary to reduce the versatility or reduce the life of the processing tool. Therefore, in this embodiment, by setting the hardness of the narrow part 21, 22 to 1.1-1.9 times of the wide area part 11, 12, 13, the same function is ensured as a support point of the bending by the difference of hardness, Cutting in a processing mechanism becomes possible. Therefore, the lifetime of a cutting tool can be extended, for example, increasing the versatility of cutting tools, such as a bite.

In this embodiment, the space | interval D of the bearing alloy layer 32 divided | segmented is set to 0.5-1.8 times the maximum length part Wm of the narrow part 21,22. Moreover, the area of the narrow part 21, 22 sets the sum total of one side end surface 211, 221 to 1.3-9.0 times the sum total of the other side end surfaces 212, 222. In addition, the narrow portion 21, 22 sets the respective average hardness to 1.1 to 1.7 times the average of the average hardness of each of the wide regions 11, 12, and 13, and sets each maximum hardness to the wide region 11, 12. And 13) 1.3 to 1.9 times the average of each average hardness. The half sliding bearing 50 is set by setting the distance D of the bearing alloy layer 32 segmented as described above, the area ratio of the narrowing portions 21 and 22, the ratio of the hardness of the narrowing portions 21 and 22, and the like. In addition to the shape precision of, the shape precision in the grooves 51 and 52 formed on the inner circumferential side of the narrow portion 21 and 22 is maintained. That is, when the ratio D of the space | interval D of these bearing alloy layers 32, the area ratio of the narrowing parts 21 and 22, and the ratio of the hardness of the narrowing parts 21 and 22 is controlled to the set range, it is half from the sliding member 10. The half sliding bearing 50 processed into a cylindrical shape can further improve roundness. By suppressing uneven deformation in the narrow portion 21, local contact between the processed half sliding bearing 50 and the housing on the outer circumferential side is reduced. Local contact between the half sliding bearing 50 and the housing may be projected by the unevenness of the inner circumferential surface formed by the bearing alloy layer 32. As a result, if a local contact occurs between the half sliding bearing 50 and the housing, the bearing alloy layer of the half sliding bearing 50 is slid by sliding between the half sliding bearing 50 and the cross head pin that is the mating member ( 32) may cause local fatigue or damage. In the present embodiment, by defining the elements of each part as described above, damage due to local contact between the half sliding bearing 50 and the housing, and the back fritting of the half sliding bearing 50 accordingly, Local fatigue or damage can be reduced.

In this embodiment, the total length Ts of the narrowing parts 21 and 22 is set to 0.60-0.95 times the plate | board thickness T of the sliding member 10 and the half sliding bearing 50. As shown in FIG. Further, the narrow portion 21, 22 formed by welding has a maximum hardness of Hv320 to 400, and a maximum hardness in the range of 0.50 to 0.95 times the plate thickness T from one side end face 211 in the plate thickness direction. The wealth is located. The half sliding bearing 50 produces a cyclic deformation under the dynamic load environment at the time of use. In the present embodiment, as described above, by setting the total length, the hardness, the position of the maximum hardness portion, and the like of the narrowing portions 21 and 22, the strength is maintained even if repeated deformation occurs. Thus, durability can be maintained even under a high load environment.

(Other Embodiments)

This invention demonstrated above is not limited to the said embodiment, It is applicable to various embodiment in the range which does not deviate from the summary.

As for the sliding member 10, as shown in FIG. 8, the bearing alloy layer 32 does not need to be segmented. In this case, the narrow portion 21 penetrates from the end face of the back metal layer 31 to the end face of the bearing alloy layer 32 in the plate thickness direction of the sliding member 10. Moreover, the sliding member 10 can arbitrarily set the shape of the groove | channel 51 formed by the bearing alloy layer 32 divided | segmented as shown in FIGS. 9-11, like the groove | channel 511, 512, 513. have. In addition, the sliding member 10 may delete not only the bearing alloy layer 32 but a part of the back metal layer 31. That is, in the sliding member 10 shown in FIGS. 9-11, the groove | channel 51 is formed not only in the bearing alloy layer 32 but in a part of the back metal layer 31. As shown in FIG.

As shown in FIG. 12, the sliding member 10 may shift | deviate the center with respect to the width direction between the groove | channel 51 and the narrow part 21. As shown in FIG. Moreover, as shown in FIG. 13, the sliding member 10 may be inclined or bent | folded with respect to the plate | board thickness direction. As described above, the narrow portion 21 can arbitrarily set the relationship with the groove 51 and the plate thickness direction.

Moreover, the sliding member 10 may form the narrow part 81 in the shape of a drum as shown in FIG. In this case, the narrow portion 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 the trapezoid is symmetrically stacked in the plate thickness direction. That is, the narrow portion 81 is thinned between the one side end surface 811 and the other end surface 812 in the plate thickness direction. As described above, even when the narrow portion 81 is formed in the shape of a drum, the exposed end face 811 has a larger exposure area, that is, a larger projected area in the plate thickness direction than the other end face 812. However, in view of the improvement of the precision of the bending process and the reduction of the residual of the welding void, the welding process is performed only from the side that becomes the outer peripheral side, and the narrowing portion has a trapezoidal shape that is perpendicular to the longitudinal direction of the narrowing portion. Is preferably. Moreover, it is more preferable that the center with respect to the width direction of the groove | channel 51 and the narrow part is centered.

In embodiment described above, the sliding member 10 and the half sliding bearing 50 demonstrated the example provided with three wide area parts 11, 12, 13, and two narrow part 21, 22. As shown in FIG. However, the sliding member 10 and the half sliding bearing 50 can arbitrarily set the number of a wide area part and a narrow part. Moreover, when providing a some narrow narrow part in the some sliding member 10 and the half sliding bearing 50, the structure which all these several narrow part meets the conditions of the above description may be sufficient, and At least one may be configured to satisfy the above-described conditions.

10: sliding member 11, 12, 13: wide area
21, 22: narrow section 31, 61: back metal layer
32, 62: bearing alloy layer 50: half sliding bearing
51, 511, 512, 513: groove 60: plate-shaped member
211, 221, 811: One side cross section 212, 222, 812: The other side cross section

Claims (18)

A flat sliding member used for a semi-cylindrical sliding bearing,
At least two wide areas,
It is interposed between the said wide-area part, Comprising: The whole length of a width direction is narrower than the said wide-area part, and has a narrower part which is harder than the said wide area part,
When one end in the plate thickness direction is called one end and the other end in the plate thickness direction is called the other end,
The narrow portion is,
One side end face exposed to the one end;
The other end surface exposed to the other end and having an exposed area smaller than the one end surface,
The whole length of the width direction of the said other side cross section is narrower than the full length of the width direction of the said one side cross section over the longitudinal direction,
The sliding member whose largest width is 0.1 to 5.0% of the full length of the width direction containing the said wide area part and the said narrow part. The method of claim 1,
A back metal layer having the wide-area portion and the narrow-angle portion made of the same metal component, and having one side end surface formed on the one end side thereof;
And a bearing alloy layer located on the other end side of the back metal layer. 3. The method of claim 2,
The narrow portion is provided in the back metal layer,
The bearing alloy layer is partitioned on the other end side of the narrow portion. The method of claim 3,
The shortest distance of the space | interval of the adjacent bearing alloy layer segmented is 0.5 to 1.8 times the largest maximum length part in the width direction of the said narrowing part perpendicular | vertical to the plate | board thickness direction in the said narrowing part. 5. The method of claim 4,
The shortest distance of the space | interval of the adjacent bearing alloy layer segmented is 1.0 to 1.8 times the said largest length part, The sliding member. The method according to any one of claims 1 to 5,
The average hardness of the narrow portion is 1.1 to 1.7 times the average hardness of the wide region,
The maximum hardness of the said narrow part is a sliding member which is 1.3-1.9 times the average hardness of the said wide area part. The method according to any one of claims 1 to 5,
The total sum of the areas of the one side cross section in the said narrowing part is 1.3 to 9.0 times the total sum of the areas of the said other side cross section in the said narrowing part. The method according to any one of claims 1 to 5,
The total length of the said narrowing part in plate | board thickness direction is 0.60-0.95 times the plate | board thickness. The method according to any one of claims 1 to 5,
The narrowing portion has a maximum hardness of 320 to 400 HV, and a sliding member having the largest maximum hardness in the range of 0.50 to 0.95 times the thickness of the plate from the one side end face in the sheet thickness direction. The method according to any one of claims 1 to 5,
The said narrowing part is a sliding member whose shape in the surface perpendicular | vertical to the longitudinal direction of this narrowing part is trapezoidal. The method according to any one of claims 1 to 5,
The said narrow part is a sliding member whose shape in the surface perpendicular | vertical to the longitudinal direction of this narrow part is a book shape which trapped the trapezoid symmetrically in the plate | board thickness direction. As a half sliding bearing provided with the sliding member of any one of Claims 1-5,
Between the said wide area part parallel to a circumferential direction, the said narrow area part extended in an axial direction is provided,
The said one end part forms the outer peripheral surface of radial direction outer side, and the other end part is a half sliding bearing which forms the inner peripheral surface of radial direction inner side. The method of claim 12,
A half sliding bearing in which two or more said narrowing parts are provided in the circumferential direction. The method of claim 12,
The half sliding bearing provided with the groove extended in an axial direction in the radial direction inner side of the said narrowing part. Listing two or more plate-shaped members,
A rapid heating quenching process is performed in a line shape in a direction perpendicular to the plate thickness at a portion where the above-mentioned plate-shaped members are in contact with each other, forming a narrow portion in which the rapid heating quenching process is performed, and a wide portion sandwiching the narrow portion; Including the process,
The narrow portion is,
The whole length of the width direction of the said other side cross section is narrower than the full length of the width direction of the said one side cross section over the longitudinal direction,
The largest width is 0.1 to 5.0% of the total length of the width direction including the wide area and the narrow area,
The manufacturing method of the flat sliding member made into a half sliding bearing through the process of bending to semi-cylindrical shape. In the manufacturing method of the half sliding bearing using the sliding member manufactured by the manufacturing method of Claim 15,
Bending the plate-shaped member subjected to the rapid heating and quenching into a semi-cylindrical shape in which the narrowing portion extends in the axial direction,
The said rapid heating quenching process is a manufacturing method of the half sliding bearing performed at the side used as an outer peripheral surface when bent in semi-cylindrical shape. In the manufacturing method of the half sliding bearing using the sliding member manufactured by the manufacturing method of Claim 15,
The plate-shaped member has a back metal layer and a bearing alloy layer, and when bent in a semi-cylindrical shape, the back metal layer is located on an outer circumference side and a half sliding bearing in which the bearing alloy layer is located on an inner circumference side. Method of preparation. In the manufacturing method of the half sliding bearing using the sliding member manufactured by the manufacturing method of Claim 15,
The said rapid heating quenching process is a manufacturing method of the half sliding bearing which is a welding process which welds two or more said plate-shaped members.

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