WO2013146108A1 - 摺動部材 - Google Patents
摺動部材 Download PDFInfo
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- WO2013146108A1 WO2013146108A1 PCT/JP2013/055816 JP2013055816W WO2013146108A1 WO 2013146108 A1 WO2013146108 A1 WO 2013146108A1 JP 2013055816 W JP2013055816 W JP 2013055816W WO 2013146108 A1 WO2013146108 A1 WO 2013146108A1
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- sliding surface
- sliding
- test
- alloy composition
- shot blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
- F04B1/2028—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
- F01B3/007—Swash plate
- F01B3/0073—Swash plate swash plate bearing means or driving or driven axis bearing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/04—Hardness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
- F16C2204/12—Alloys based on copper with tin as the next major constituent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/02—Mechanical treatment, e.g. finishing
- F16C2223/08—Mechanical treatment, e.g. finishing shot-peening, blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/48—Particle sizes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/54—Surface roughness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
Definitions
- the present invention relates to a sliding member that slidably supports an object to be slid.
- the sliding surface is a smooth surface to reduce friction.
- the frictional resistance can be kept low, but a certain amount of heat is generated on the sliding surface, and so-called seizure may occur. For this reason, the sliding surface is required to have an appropriate surface roughness.
- An object of the present invention is to provide a sliding member having hardness suitable for an environment in which a high load is applied and having excellent wear resistance.
- the present inventors pay attention to the improvement of the surface hardness of the object subjected to the shot blasting treatment, and can form an oil sump suitable for hardness suitable for an environment in which a high load is applied and wear resistance. A combination of surface roughness was found.
- the surface of the sliding layer that slidably supports the object to be slid is subjected to shot blasting, and the surface of the sliding layer has an arithmetic average roughness (Ra) of 1.0 to 2.5 ⁇ m
- the sliding member has a sliding surface having a concavo-convex shape having a ten-point average roughness (Rz) of 5.0 to 10.0 ⁇ m and a surface hardness (Hv) of 220 to 250.
- the shot blast treatment uses a scouring material composed of a ferrous metal material having a spherical shape with a particle size of 180 to 300 ⁇ m and a surface hardness (Hv) of 280 to 600, and a spraying distance of 50 mm to 150 mm.
- the time is preferably 5 seconds or more and 30 seconds or less.
- the sliding layer is preferably made of a copper alloy having a surface hardness (Hv) before shot blasting of 80 to 150.
- the arithmetic average roughness (Ra) of the sliding surface is 1.0 to 2.5 ⁇ m, and the ten-point average roughness (Rz) is 5.0 to 10.0 ⁇ m.
- An oil reservoir is formed on the moving surface, and the surface hardness (Hv) of the sliding surface is set to 220 to 250, so that the uneven shape of the sliding surface can be maintained even in an environment where a high load is applied.
- FIG. 2 is a photomicrograph of a sliding surface of a plain bearing before and after a test in Example 1.
- FIG. 2 is a micrograph of a sliding surface of a plain bearing before and after a test in Example 2.
- FIG. 2 is a micrograph of a sliding surface of a plain bearing before and after a test in Example 2.
- FIG. It is a microscope picture of the sliding surface of the plain bearing before the test in Example 3, and after the test. It is a microscope picture of the sliding surface of the plain bearing before the test in Example 3, and after the test. It is a microscope picture of the sliding surface of the plain bearing before the test in Comparative Example 1 and after the test. It is a microscope picture of the sliding surface of the plain bearing before the test in Comparative Example 1 and after the test.
- the sliding member of this embodiment has an arithmetic average roughness (Ra) of 1.0 to 2.5 ⁇ m and a ten-point average roughness (Rz) on the surface of the sliding layer that slidably supports the object to be slid. ) Is 5.0 to 10.0 ⁇ m, and a concave and convex sliding surface having a surface hardness (Hv) of 220 to 250 is formed.
- the sliding member of this embodiment has a sliding layer formed of a metal material having a single composition, an alloy material having a predetermined composition, or a porous material made of an alloy material impregnated with a resin material.
- a sliding surface having a desired surface roughness capable of forming an oil sump and improving slidability is formed.
- the surface hardness of the sliding layer is improved, and a sliding surface having a desired surface hardness required in an environment where a high load is applied is formed.
- a substantially spherical polishing material composed of an iron-based metal material having a particle size of 180 to 300 ⁇ m and a surface hardness (Hv) of 280 to 600 is used.
- the shot blast treatment is performed by spraying the above-described polishing material onto the surface of the sliding layer with the spraying distance of the polishing material being 50 mm or more and 150 mm or less and the cleaning time being 5 seconds or more and 30 seconds or less.
- the above-described sliding blast treatment is performed on the sliding layer formed of an existing copper alloy having a surface hardness (Hv) of about 80 to 150, for example, a Cu—Sn alloy, under the above-described conditions.
- a sliding surface having a desired surface roughness and surface hardness is formed.
- FIG. 1 is a configuration diagram showing an example of a piston pump to which the sliding member of the present embodiment is applied as an example of a hydraulic device, and is a schematic side sectional view of the piston pump.
- the piston pump 1 is mounted on the case 3 with the cylinder block 2 supported by the input shaft 20, and the cylinder block 2 is rotated by the driving force transmitted to the input shaft 20.
- a plurality of cylinders 21 are formed in the cylinder block 2 along the rotation direction, and the pistons 4 are attached to the cylinders 21 so as to be able to be put in and out.
- the piston pump 1 is provided with a plain bearing 5 that rotatably supports the cylinder block 2.
- the plain bearing 5 includes a suction port 50 and a discharge port 51 that open along the rotation direction of the cylinder block 2.
- the suction port 30 and the suction port 50 provided in the case 3 communicate with each other.
- the discharge port 51 is connected to be attached between the cylinder block 2 and the case 3.
- the plain bearing 5 is applied with the sliding member of the present embodiment, and the cylinder block 2 and the plain bearing 5 are relatively rotated by rotating in a state where the cylinder block 2 becomes a sliding object and is pressed in the axial direction. To slide.
- the piston pump 1 includes a swash plate 6 that moves the piston 4 in and out of the cylinder 21 of the cylinder block 2 as the cylinder block 2 rotates, a yoke 60 that switches the angle of the swash plate 6, and the swash plate 6 and the yoke 60.
- An operating piston 7 and a return spring 8 are provided.
- the piston pump 1 As the cylinder block 2 rotates, oil is sucked in the cylinder 21 on the side where the piston 4 protrudes from the cylinder block 2, and the oil is discharged on the cylinder 21 on the side where the piston 4 enters.
- the piston pump 1 is configured such that the stroke of the piston 4 varies by changing the angles of the swash plate 6 and the yoke 60 and the oil discharge amount can be adjusted.
- the piston pump 1 is provided with a half bearing 9 in the case 3 that supports the swash plate 6 and the yoke 60 in a swingable manner.
- the sliding bearing of the present embodiment is applied to the half bearing 9, and the shaft portion 61 of the yoke 60 swings in a state where the shaft portion 61 becomes a sliding object and is pressed in the circumferential direction.
- the half bearing 9 slides relatively.
- the piston pump 1 has a configuration in which the oil suction side and the discharge side are fixed. In the configuration in which the cylinder block 2 rotates in both forward and reverse directions, the oil suction side and the discharge side are It is the structure which can be switched.
- the plain bearing 5 slides in one direction or both forward and reverse directions along the circumferential direction in a state where a high load is applied when the cylinder block 2 is pressed in the axial direction. Thereby, the cylinder block 2 and the flat bearing 5 slide in the circular direction in a state where a high load is applied.
- the oil discharge amount is variable by swinging the swash plate 6 and the yoke 60 in both the forward and reverse directions.
- the shaft portion 61 of the yoke 60 is circular.
- the shaft portion 61 slides in both forward and reverse directions along the circumferential direction in a state where a high load is applied by being pressed in the circumferential direction.
- the shaft part 61 and the half bearing 9 slide in a linear direction in a state where a high load is applied.
- Examples 1 to 4 were produced by subjecting a sliding layer made of an alloy material having the composition shown in Table 1 below to shot blasting treatment under the conditions described above. The shape and surface hardness of the sliding surface of Example 3 were compared with the sliding surfaces of Comparative Examples 1 to 3 manufactured without performing the shot blasting treatment.
- FIGS. 2A, 2B and 2C are graphs showing the surface roughness shape of the sliding surface in each example.
- FIGS. 2A, 2B and 2C are based on the standard of JIS B 0601 (1994), and FIG. 2A shows the surface roughness shape of the sliding surface which has been shot blasted with the alloy composition of Example 1.
- 2B shows the surface roughness shape of the sliding surface subjected to shot blasting treatment with the alloy composition of Example 2
- FIG. 2C shows the sliding surface subjected to shot blasting treatment with the alloy composition of Example 3. The surface roughness shape of is shown.
- FIG. 3A, 3B, and 3C are graphs showing the surface roughness shape of the sliding surface in each comparative example.
- FIG. 3A, FIG. 3B and FIG. 3C are based on the standard of JIS B 0601 (1994)
- FIG. 3A is the surface roughness shape of the sliding surface which is not subjected to shot blasting with the alloy composition of Comparative Example 1.
- FIG. 3B shows the surface roughness shape of the sliding surface not subjected to shot blasting treatment with the alloy composition of Comparative Example 2
- FIG. 3C shows that the shot blasting treatment is not performed with the alloy composition of Comparative Example 3.
- the surface roughness shape of the sliding surface is shown.
- FIG. 4A, 4B and 4C are photomicrographs of the sliding surface in each example.
- FIG. 4A is a photomicrograph of a sliding surface that has been shot blasted with the alloy composition of Example 1
- FIG. 4B is a photomicrograph of a sliding surface that has been shot blasted with the alloy composition of Example 2.
- FIG. 4C is a photomicrograph of a sliding surface subjected to shot blasting treatment with the alloy composition of Example 3.
- FIG. 5A, FIG. 5B and FIG. 5C are micrographs of sliding surfaces in each comparative example.
- FIG. 5A is a photomicrograph of a sliding surface not subjected to shot blasting treatment with the alloy composition of Comparative Example 1
- FIG. 5B is a sliding surface of the alloy composition of Comparative Example 2 not subjected to shot blasting treatment.
- a photomicrograph, FIG. 5C is a photomicrograph of a sliding surface of the alloy composition of Comparative Example 3 that has not been shot blasted.
- the sliding surface 10 is formed into an uneven shape by performing shot blasting on the sliding layer 11,
- the arithmetic average roughness (Ra) is 2.299 ⁇ m
- the ten-point average roughness (Rz) is 8.739 ⁇ m
- the average interval (Sm) of the unevenness is 0.3114 mm. there were.
- the surface hardness (Hv) was 229 as shown in Table 1.
- Example 2 in which the alloy composition is Cu—Sn—Bi, the arithmetic average roughness (Ra) is 2.344 ⁇ m, the ten-point average roughness (Rz) is 8.286 ⁇ m, and the average interval (Sm) of unevenness is 0.2. It was 2244 mm.
- the surface hardness (Hv) was 231.
- Example 3 in which the alloy composition is Cu—Sn—Pb, the arithmetic average roughness (Ra) is 1.821 ⁇ m, the ten-point average roughness (Rz) is 7.071 ⁇ m, and the average interval (Sm) of unevenness is 0.00. It was 2067 mm.
- the surface hardness (Hv) was 236.
- the sliding surface 100 is smooth by not performing the shot blasting process on the sliding layer 101.
- the arithmetic average roughness (Ra) is 1.198 ⁇ m
- the ten-point average roughness (Rz) is 7.976 ⁇ m
- the average interval of unevenness (Sm) is 0. 2378 mm.
- the surface hardness (Hv) was 118 as shown in Table 1.
- FIG. 6A, FIG. 6B, FIG. 7A, FIG. 7B, FIG. 8A and FIG. 8B are photomicrographs of the sliding surfaces before and after the test of the half bearing in each example.
- FIG. 6A is a photomicrograph before the test of the sliding surface of the half bearing subjected to shot blasting treatment with the alloy composition of Example 1 described above
- FIG. 6B is shot blasting treatment with the alloy composition of Example 1. It is the microscope picture after the test of the sliding surface of the half bearing which gave.
- FIG. 7A is a photomicrograph of a sliding surface of a half bearing that has been shot blasted with the alloy composition of Example 2 before the test, and FIG. 7B is shot blasted with the alloy composition of Example 2. It is a microscope picture after the test of the sliding surface of a half bearing.
- FIG. 8A is a photomicrograph of a sliding surface of a half bearing that has been shot blasted with the alloy composition of Example 3 before the test, and FIG. 8B is shot blasted with the alloy composition of Example 3. It is a microscope picture after the test of the sliding surface of a half bearing.
- FIG. 9A, FIG. 9B, FIG. 10A, FIG. 10B, FIG. 11A and FIG. 11B are photomicrographs of the sliding surface before and after the test of the half bearing in each comparative example.
- FIG. 9A is a micrograph before the test of the sliding surface of the half bearing with the alloy composition of Comparative Example 1 that has not been shot blasted
- FIG. 9B is shot blasting with the alloy composition of Comparative Example 1. It is a microscope picture after the test of the sliding surface of the half bearing which has not been processed.
- FIG. 10A is a photomicrograph of a sliding surface of a half bearing that has not been shot blasted with the alloy composition of Comparative Example 2 before the test, and FIG. 10B is shot blasted with the alloy composition of Comparative Example 2. It is the microscope picture after the test of the sliding surface of the half bearing which is not.
- FIG. 11A is a photomicrograph of a sliding surface of a half bearing that has not been shot blasted with the alloy composition of Comparative Example 3 before the test, and FIG. 11B is shot blasted with the alloy composition of Comparative Example 3. It is the microscope picture after the test of the sliding surface of the half bearing which is not.
- the uneven shape of the sliding surface formed by the shot blasting process is as shown in FIG. It remained on the sliding surface.
- the alloy composition of Example 1 does not contain Pb having a self-lubricating effect, and it is possible to suppress the occurrence of adhesion if an oil film can be appropriately retained under boundary lubrication without adding Pb. .
- the half bearing 9 to which the sliding member of Example 2 having an alloy composition of Cu—Sn—Bi is applied is roughened by shot blasting as shown in FIG. 2B.
- the uneven shape formed above and below the center line O becomes a sump of oil on the sliding surface and plays a role of retaining an oil film. There was no evidence of wearing.
- the uneven shape of the sliding surface formed by the shot blasting process is as shown in FIG. It remained on the sliding surface.
- the half bearing 9 to which the sliding member of Example 3 having an alloy composition of Cu—Sn—Pb is applied is roughened by shot blasting as shown in FIG. 2C.
- the uneven shape formed above and below the center line O becomes an oil reservoir on the sliding surface and plays a role of retaining an oil film. There was no evidence of wearing.
- the uneven shape of the sliding surface formed by the shot blasting process is as shown in FIG. 8B after the test. It remained on the sliding surface.
- FIG. 12A, FIG. 12B, FIG. 13A, FIG. 13B, FIG. 14A and FIG. 14B are photomicrographs of the sliding surface before and after the test of the plain bearing in each example.
- FIG. 12A is a micrograph before the test of the sliding surface of the plain bearing subjected to the shot blasting treatment with the alloy composition of Example 1 described above
- FIG. 12B is the shot blasting treatment with the alloy composition of Example 1. It is the microscope picture after the test of the sliding surface of the given plain bearing.
- FIG. 13A is a photomicrograph of a sliding surface of a plain bearing that has been shot blasted with the alloy composition of Example 2 before the test
- FIG. 13B is a flat photograph that has been shot blasted with the alloy composition of Example 2. It is the microscope picture after the test of the sliding surface of a bearing.
- FIG. 14A is a photomicrograph of a sliding surface of a plain bearing that has been shot blasted with the alloy composition of Example 3 before the test
- FIG. 14B is a flat photograph that has been shot blasted with the alloy composition of Example 3. It is the microscope picture after the test of the sliding surface of a bearing.
- FIG. 15A, FIG. 15B, FIG. 16A, FIG. 16B, FIG. 17A and FIG. 17B are photomicrographs of the sliding surface before and after the test of the plain bearing in each comparative example.
- FIG. 15A is a micrograph before a test of a sliding surface of a plain bearing that has not been shot blasted with the alloy composition of Comparative Example 1 described above
- FIG. 15B is a shot blasted process with the alloy composition of Comparative Example 1. It is the microscope picture after the test of the sliding surface of the plain bearing which has not been given.
- FIG. 16A is a photomicrograph of a sliding surface of a plain bearing that has not been shot blasted with the alloy composition of Comparative Example 2 before the test, and FIG. 16B is shot blasted with the alloy composition of Comparative Example 2. It is the microscope picture after the test of the sliding surface of a flat bearing which is not.
- FIG. 17A is a photomicrograph of a sliding surface of a plain bearing that has not been shot blasted with the alloy composition of Comparative Example 3 before the test, and FIG. 17B is shot blasted with the alloy composition of Comparative Example 3. It is the microscope picture after the test of the sliding surface of a flat bearing which is not.
- the uneven shape of the sliding surface formed by the shot blasting process is as shown in FIG. It remained on the sliding surface.
- the plain bearing 5 to which the sliding member of Example 2 having an alloy composition of Cu—Sn—Bi is applied is also roughened by shot blasting as shown in FIG. 2B.
- An uneven shape formed above and below the center line O becomes an oil reservoir on the sliding surface, and plays a role of holding an oil film, and the sliding surface in the vicinity of the discharge port 51 shown in FIG. Further, as shown in FIG. 13B, no erosion was observed even after the test.
- the uneven shape of the sliding surface formed by the shot blasting process is as shown in FIG. 13B after the test. It remained on the sliding surface.
- the plain bearing 5 to which the sliding member of Example 3 having an alloy composition of Cu—Sn—Pb is applied is also roughened by shot blasting as shown in FIG. 2C.
- An uneven shape formed above and below the center line O becomes an oil reservoir on the sliding surface, and plays a role of holding an oil film, and the sliding surface in the vicinity of the discharge port 51 shown in FIG.
- no erosion was observed even after the test.
- the uneven shape of the sliding surface formed by the shot blasting process is as shown in FIG. 14B after the test. It remained on the sliding surface.
- the oil flow formation under boundary lubrication is provided with an uneven shape on the sliding surface by shot blasting, and the surface hardness is improved. It has been found that erosion due to the above can be suppressed, and if the sliding member of each embodiment is applied to the plain bearing 5 of the piston pump 1 shown in FIG.
- the sliding member of the present invention exhibits adhesion resistance, wear resistance, and erosion resistance even under boundary lubrication, it is suitable to be applied to a bearing of a hydraulic device where a high load is applied.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
以下の表1に示す組成の合金材料で作製した摺動層に対して、上述した条件でショットブラスト処理を施して作製した実施例1~実施例3の摺動面と、ショットブラスト処理を施さずに作製した比較例1~比較例3の摺動面の形状、及び表面硬度を比較した。
上述した表面形状の違いが凝着、磨耗、浸食といった耐久性に及ぼす影響を検証するため、図1に示すようなピストンポンプ1を使用して試験を行った。試験対象の摺動部材としては、ショットブラスト処理を施すことで、上述した実施例1~実施例3の摺動面10を持つ平軸受5及び半割軸受9と、ショットブラスト処理を施さないことで、上述した比較例1~比較例3の摺動面100を持つ平軸受5と半割軸受9を作製した。試験条件は以下の通りである。
吐出圧力 :0~28MPa
サイクル数:3万回サイクル(ON:1sec,OFF:1sec)
油温 :60℃
軸回転数 :N=1800rpm
Claims (3)
- 被摺動物を摺動可能に支持する摺動層の表面にショットブラスト処理が施され、前記摺動層の表面に、算術平均粗さ(Ra)が1.0~2.5μm、十点平均粗さ(Rz)が5.0~10.0μm、表面硬度(Hv)が220~250の凹凸形状を持つ摺動面が形成された
ことを特徴とする摺動部材。 - ショットブラスト処理は、粒度が180~300μmの球形で、表面硬度(Hv)が280~600の鉄系の金属材料で構成される研掃材が使用され、噴射距離を50mm以上150mm以下、研掃時間を5秒以上30秒以下とした
ことを特徴とする請求項1に記載の摺動部材。 - 前記摺動層は、ショットブラスト処理前の表面硬度(Hv)が、80~150の銅合金で構成される
ことを特徴とする請求項1または請求項2に記載の摺動部材。
Priority Applications (4)
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US14/388,016 US10309457B2 (en) | 2012-03-27 | 2013-03-04 | Sliding member |
EP13767498.2A EP2833008B1 (en) | 2012-03-27 | 2013-03-04 | Sliding member |
JP2013516873A JP5304974B1 (ja) | 2012-03-27 | 2013-03-04 | 摺動部材 |
CN201380016371.2A CN104169599B (zh) | 2012-03-27 | 2013-03-04 | 滑动构件 |
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JP2012071568 | 2012-03-27 | ||
JP2012-071568 | 2012-03-27 |
Publications (1)
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WO2013146108A1 true WO2013146108A1 (ja) | 2013-10-03 |
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PCT/JP2013/055816 WO2013146108A1 (ja) | 2012-03-27 | 2013-03-04 | 摺動部材 |
Country Status (5)
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US (1) | US10309457B2 (ja) |
EP (1) | EP2833008B1 (ja) |
JP (1) | JP5304974B1 (ja) |
CN (1) | CN104169599B (ja) |
WO (1) | WO2013146108A1 (ja) |
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JP2019218928A (ja) * | 2018-06-22 | 2019-12-26 | ダイキン工業株式会社 | 冷凍装置 |
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US9956613B2 (en) | 2012-10-25 | 2018-05-01 | Senju Metal Industry Co., Ltd. | Sliding member and production method for same |
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Also Published As
Publication number | Publication date |
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US20150049966A1 (en) | 2015-02-19 |
EP2833008A4 (en) | 2015-03-18 |
EP2833008B1 (en) | 2016-05-11 |
US10309457B2 (en) | 2019-06-04 |
JPWO2013146108A1 (ja) | 2015-12-10 |
CN104169599B (zh) | 2015-08-26 |
CN104169599A (zh) | 2014-11-26 |
JP5304974B1 (ja) | 2013-10-02 |
EP2833008A1 (en) | 2015-02-04 |
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