JP4784829B2 - Sliding member manufacturing method and sliding member - Google Patents

Description

  The present invention relates to a sliding member having a sliding layer made of a resin film attached to the surface of a substrate, and a method for manufacturing the same.

  A sliding member in which a resin sliding layer is formed on the surface of a base material such as a steel plate to provide low friction and seizure resistance is used in a wide range of fields. As a method of manufacturing a sliding member having a sliding layer made of resin, sliding is performed by coating the surface of the substrate with resin as a paint, or molding molten resin on the surface of the substrate. It is common to form layers.

  For example, Patent Document 1 discloses a sliding member having a sliding film formed by applying a coating composition in which a solid lubricant or inorganic particles are blended in a resin varnish to a surface of a base material and then curing the coating composition. Yes. However, when the sliding film is formed on the curved surface of the base material using a paint, the surface of the sliding film is likely to swell and sag. For this reason, after the sliding film is formed, the surface of the sliding film is subjected to processing such as polishing.

On the other hand, as in Patent Document 2, if a resin sheet is thermocompression bonded, a sliding layer having a uniform thickness and surface state can be formed. However, since a resin sheet is generally produced by applying tension when it is formed into a sheet shape, the resin sheet is deformed according to the heating and pressurizing conditions during thermocompression bonding. In particular, when a rectangular resin sheet is made to make a round on the outer peripheral surface of a cylindrical drive shaft and thermocompression-bonded, the change in the length of the resin sheet corresponding to the circumferential direction of the sliding layer is significant. For example, even if the resin sheet is cut out so that the length of the two opposite sides is the same as the circumference of the drive shaft, the resin sheet is deformed when wound around the outer peripheral surface of the drive shaft and thermocompression bonded. As a result of the increase in length, the outer periphery of the base material is overlapped one or more times, and the resin sheet contracts and shortens, resulting in a gap that reduces sliding performance. That is, it is difficult to thermo-compress a rectangular resin sheet with high dimensional accuracy in the circumferential direction.
JP 2004-316499 A JP 2006-054993 A

  In view of the above problems, the present invention provides a resin sheet cut into a specific shape when a sliding layer is formed by thermocompression bonding of a resin sheet to the outer peripheral surface of a substrate having a circular cross section like a drive shaft. It is an object of the present invention to provide a method for manufacturing a sliding member capable of accurately thermocompression bonding a resin sheet.

A manufacturing method of a sliding member according to the present invention includes a base material having a circular cross section, and a sliding layer formed of a resin layer thermocompression bonded to at least a part of the outer peripheral surface of the base material. A method for manufacturing a member, comprising:
The resin sheet is parallel to each other and has a substantially circumferential length of the base material and a first side and a second side that are substantially equal in distance to the width of the sliding layer, and are parallel to each other on the first side. A parallelogram sheet piece partitioned by a third side and a fourth side inclined with respect to the vertical direction,
A direction parallel to the first side and the second side of the sheet piece with respect to the circumferential direction of the base material is given a predetermined angle so that the direction parallel to the first side and the second side of the sheet piece The sheet piece is wound substantially once or more than once around the substrate so as to coincide with the substantially circumferential direction of the substrate, and the third side and the fourth side are brought into contact with each other or opposed to each other at a predetermined interval. To do.

  Or after heating the said base material and / or the said resin sheet, and making the direction parallel to the said 1st edge | side and said 2nd edge | side of this sheet piece and the circumferential direction of this base material become, this sheet piece Is wound on the base material from the third side, and the fourth side is in contact with the third side or is wound so as to face the base side at a predetermined interval, and the sheet piece is wound around the base material substantially once or more than once. It is characterized by winding.

  Here, “substantially one round” means that the sheet piece goes around the outer peripheral surface of the base material so that the third side and the fourth side come into contact with each other, as well as between the third side and the fourth side. It also includes a state of being opposed to each other with a predetermined interval (less than one round). Further, depending on the position of the first side and the second side, the third side and the fourth side can be opposed or abutted by making one or more rounds. The state where the third side and the fourth side of the sheet piece overlap is not included.

The sliding member manufacturing method of the present invention includes a base material having a circular cross section, and a sliding layer formed of a resin sheet thermocompression bonded to at least a part of the outer peripheral surface of the base material. A method of manufacturing a sliding member,
A step having at least a pair of short sides on the resin sheet, the distance between two parallel sides being equal to the width of the sliding layer, and being parallel to the sides and located on the same straight line at both ends. And a belt-like sheet having a length in a direction parallel to the side except the length including the short side is equal to the length of the substantially circumference of the substrate,
A direction parallel to the side edge is made coincident with a circumferential direction of the base material, and the belt-like sheet is wound around the base material substantially once so that the both end portions face each other and a pair of the short sides are brought into contact with each other. Features.

Alternatively, the resin sheet has at least a distance between two side edges parallel to each other equal to the width of the sliding layer, at both ends parallel to the side edge and at a different distance from one of the side edges. A belt-like sheet having a step portion having a pair of short sides and having a length in a direction parallel to the side excluding a range sandwiched between straight lines including the short sides equal to the length of the substantially circumference of the base material,
The belt-like sheet is wound around the base material so that the direction parallel to the side edge coincides with the circumferential direction of the base material so that both ends are opposed to each other and the pair of short sides are opposed at a predetermined interval. It is characterized by making it.

  Here, “substantially one round” means a state in which the belt-like sheet is made to make a round on the outer peripheral surface of the substrate so that both ends in the length direction of the belt-like sheet are in contact with each other with a predetermined interval therebetween. (Less than one turn) is also included. The state where both ends of the belt-like sheet overlap is not included.

Moreover, the sliding member of this invention can be manufactured with the manufacturing method of the said sliding member of this invention.
The sliding member of the present invention is obtained by the manufacturing method of the sliding member of the present invention using the parallelogram sheet piece, the third side and the fourth side are opposed to each other with a predetermined interval, An oil retaining groove that is partitioned by the outer peripheral surface of the base material, the third side, and the fourth side to hold lubricating oil is formed in the sliding layer. Or the sliding member of this invention is obtained by the manufacturing method of the sliding member of this invention using the said strip | belt-shaped sheet | seat, Comprising: It is divided by the outer peripheral surface of the said base material, and a pair of said short side, and hold | maintains lubricating oil. An oil retaining groove is formed in the sliding layer.

  A manufacturing method of a sliding member according to the present invention includes a base member having a circular cross section, and a sliding member formed of a resin layer thermocompression bonded to at least a part of the outer peripheral surface of the base member. In this manufacturing method, parallelogram sheet pieces (excluding squares and rectangles (the same applies hereinafter)) or strip-shaped sheets having stepped portions at both ends are used as the resin sheet. Since the resin sheet has a specific shape, the dimensions of the resin sheet can be easily adjusted, and the resin sheet can be thermocompression bonded with good workability. Specifically, when the resin sheet is wound around the outer peripheral surface of the substrate and thermocompression-bonded, the resin sheets do not overlap with each other or no gap is formed, or the gap between the opposing resin sheets is formed at an interval between the gaps. It is possible to control and adjust the dimensions easily and accurately.

  Below, the best form for implementing the manufacturing method of the sliding member of this invention is demonstrated using FIGS. Below, although the manufacturing method of the sliding member of this invention is demonstrated, the content is suitably selected or combined and it can apply also to the sliding member of this invention.

  A manufacturing method of a sliding member according to the present invention includes a base material having a circular cross section, and a sliding layer formed of a resin layer thermocompression bonded to at least a part of the outer peripheral surface of the base material. It is a method of manufacturing a member.

  The material of the substrate is not particularly limited, and a metal or ceramic substrate can be used. If it is a metal substrate, for example, iron-based materials such as iron and steel, aluminum, aluminum alloys including Mg, Cu, Zn, Si, Mn, etc., copper, copper including Zn, Al, Sn, Mn, etc. Alloys are preferred. Moreover, if it is a ceramic base material, for example, alumina, zirconia, silicon carbide and the like are preferable.

  The shape of the substrate is not particularly limited as long as it has a circular cross section. For example, a cylindrical shape or a hollow cylindrical shape is preferable, and the cross-sectional shape is not limited to a perfect circle. Further, at least the outer peripheral surface of the substrate to which the resin sheet is thermocompression bonded has a ten-point average roughness (JIS) of 0.1 to 10 μmRz, preferably 1 to 5 μmRz, and preferably 0.1 μmRz. If it is above, the adhesiveness between the substrate and the resin sheet is improved, and if it is 10 μmRz or less, the influence on the surface (sliding surface) of the resin sheet is reduced, which is preferable.

  The substrate is particularly preferably a sliding part of a compressor. That is, the sliding member obtained by the manufacturing method of the present invention is suitable as a sliding member for a compressor. Specifically, a housing mainly having a suction chamber, a discharge chamber, and a cylinder bore, a drive shaft rotatably supported by the housing, a swash plate that can rotate in synchronization with the drive shaft, and a swash plate moored via a shoe. A drive shaft of a compressor comprising: a piston that reciprocates in a cylinder bore in accordance with an inclination angle of the swash plate; and a rotary valve that rotates in synchronization with the drive shaft to communicate the compression chamber with the suction chamber; Piston or rotary valve. In the case of a rotary valve, the communication port that connects the compression chamber and the suction chamber may be processed after the resin sheet is thermocompression bonded to form the sliding layer.

  The resin sheet is not particularly limited as long as it can be thermocompression bonded to the outer peripheral surface of the base material, and may be selected according to the required sliding characteristics. For example, the resin sheet may contain a polyaryl ketone resin at least in the surface layer portion. Polyaryl ketone resins have high mechanical strength among thermoplastic resins, and are excellent in heat resistance, flame retardancy, wear resistance, chemical resistance, hydrolysis resistance, and the like. Therefore, a sliding layer comprising at least a surface layer portion containing a polyaryl ketone resin and having the surface layer portion as a sliding surface exhibits excellent sliding characteristics even under severe use conditions.

  Examples of the polyaryl ketone resin include polyether ether ketone (PEEK) resin and polyether ketone resin. However, when using a resin sheet made of a polyaryl ketone resin, the polyaryl ketone resin has a high melting point and is difficult to melt. Therefore, it is necessary to use a highly heat-resistant base material that does not deteriorate even when thermocompression bonded. If it is a resin sheet containing a polyaryl ketone resin and a thermoplastic polyimide resin that are compatible with each other, it exhibits fluidity suitable for adhesion even at a low temperature of 300 ° C. or lower. Further, the resin sheet may be a laminated sheet composed of an adhesive layer excellent in adhesion to the substrate even if it is low-temperature thermocompression bonding, and a surface layer laminated on the adhesive layer and containing a polyaryl ketone resin. Good. As the adhesive layer, an adhesive layer coated with a thermosetting resin such as an epoxy resin, an adhesive layer containing a thermoplastic polyimide resin and a polyaryl ketone resin, or the like can be used. As the thermoplastic polyimide resin, polyetherimide (PEI) is preferable.

  The resin sheet may further contain a solid lubricant. If a resin sheet containing a solid lubricant is used, the sliding characteristics of the sliding layer are improved. Solid lubricants include fluorine resins such as polytetrafluoroethylene (PTFE), fluorine compounds such as graphite fluoride and calcium fluoride, sulfides such as molybdenum disulfide and tungsten disulfide, and layered structures such as graphite and talc. , Pb, Ag, Cu, and other soft metals and their compounds may be used as long as they are usually used as solid lubricants. In addition, titanium oxide, tungsten carbide, boron nitride, melamine cyanurate, etc. can be used.

  The film disclosed in JP 2006-45493 A (Patent Document 2) can be suitably used as a resin sheet in the present invention.

  Although there is no limitation in particular in the thickness of a resin film, it is good in it being 5-100 micrometers. Within this range, a uniform sliding layer can be formed by thermocompression bonding. Note that the thickness of the resin film is substantially equal to the thickness of the sliding layer.

  In the manufacturing method of the sliding member of this invention, workability | operativity was improved by making a resin sheet into a specific shape. In the sliding member manufacturing method of the present invention, the resin sheet is a parallelogram sheet piece. FIG. 1 shows a plan view of a parallelogram sheet piece and a perspective view before the sheet piece is wound around a substrate. The parallelogram sheet piece 10 is partitioned by a first side 11 and a second side 12 that are parallel to each other, and a third side 13 and a fourth side 14 that are parallel to each other. The length L of the first side 11 and the second side 12 is substantially equal to the circumferential length L ′ (= 2πr) of the substrate 9, and the distance W between the first side 11 and the second side 12 parallel to each other is It is substantially equal to the width W ′ of the sliding layer. The third side 13 and the fourth side 14 are inclined with respect to a direction perpendicular to the first side 11 (that is, a direction perpendicular to the second side 12). In particular, in the parallelogram sheet piece 10 shown in FIG. 1, the angle θ formed by the shorter diagonal line 19 and the first side 11 and the angle θ formed by the diagonal line 19 and the second side 12 are 90 ° or less. Here, the width W ′ of the sliding layer is defined as the width of the sliding layer extending in the axial direction of the base material in the sliding member obtained by the manufacturing method of the sliding member of the present invention.

  In the parallelogram sheet piece 10, if the length L of the sheet piece 10 is L = 2πr, the direction parallel to the first side 11 and the second side 12 of the sheet piece 10 (the “length direction of the sheet piece 10”). ”) And the winding direction (the circumferential direction of the base material 9 if it is wound around the base material 9) are made to coincide with each other, and the first side 11 and the second side 12 are each set to the same circumference. The third side 13 and the fourth side 14 coincide with each other on the same line. However, when the sheet piece 10 is wound around in a state where the third side 13 and the fourth side 14 are in contact with each other with an angle φ between the length direction and the winding direction of the sheet piece 10, the winding diameter is expanded. . Therefore, when wound around the base material 9 in the same manner, the end on the third side 13 side and the end on the fourth side 14 side overlap as shown in the side view of FIG. Further, when the sheet piece 10 is wound once in a state where the third side 13 and the fourth side 14 are in contact with each other with an angle −φ in the length direction and the winding direction of the sheet piece 10, the winding diameter is reduced. The Therefore, when the substrate 9 is wound in the same manner, a gap is generated between the third side 13 and the fourth side 14 facing each other as shown in FIG. Therefore, the dimension of the sheet piece 10 in the direction coinciding with the circumferential direction of the substrate is easily adjusted by fine adjustment in the winding direction.

  Therefore, in the manufacturing method of the sliding member of the present invention, the direction parallel to the first side 11 and the second side 12 of the sheet piece 10 (the length direction of the sheet piece 10) matches the substantially circumferential direction of the base material 9. Let In order to make the length direction of the sheet piece 10 and the substantially circumferential direction of the base material 9 coincide with each other, the sheet piece 10 is made to have a predetermined angle in the length direction of the sheet piece 10 with respect to the circumferential direction of the base material 9. The direction of winding around the material 9 may be finely adjusted. At this time, it is preferable that the length direction of the sheet piece 10 is slightly inclined with respect to the circumferential direction of the base material 9, and in some cases, both directions coincide with each other. Since the sheet piece 10 is a parallelogram, the sheet piece 10 is wound around the base material 9 with a predetermined angle in the winding direction, so that the size of the sheet piece 10 is changed by heating or pressurization. Even if this occurs, the third side 13 and the fourth side 14 can be brought into contact with each other or opposed to each other at a predetermined interval. Note that the winding direction of the sheet piece 10 may be finely adjusted in advance by considering the amount of deformation of the sheet piece 10 according to the heating and pressurizing conditions during thermocompression bonding.

  Moreover, in the manufacturing method of the sliding member of the present invention, the sheet piece 10 has a direction parallel to the first side 11 and the second side 12 (the length direction of the sheet piece 10) and the circumferential direction of the substrate 9. After matching, the substrate 9 may be wound around the base 9 from the third side 13 side. At this time, the third side 13 and the fourth side 14 are opposed to each other at a predetermined position. Since the sheet piece 10 has a parallelogram shape, the length direction of the sheet piece 10 is slightly inclined with respect to the circumferential direction of the base material 9 (that is, the winding direction is finely adjusted). It is easy to adjust the dimension of the sheet piece 10 that coincides with the circumferential direction of the substrate. Specifically, when the base material 9 and / or the sheet piece 10 is heated and the sheet piece 10 is wound around the base material 9 from the third side 13 side and thermocompression-bonded, the sheet piece 10 contracts. When the length L becomes shorter than the circumferential length L ′ of the base material 9, the first thermocompression bonding is performed sequentially in accordance with the position of the third side 13 already thermocompression bonded to the outer peripheral surface of the base material. By finely adjusting the winding direction on the four sides 14 side, as shown in FIG. 4, the third side 13 and the fourth side 14 are aligned on the same line, and the sheet piece 10 is brought into contact with no gap, As shown in FIG. 5, it is easy to face each other with a gap 15 having a predetermined width between the third side 13 and the fourth side 14. In this way, the sheet piece 10 is wound around the base material 9 substantially once with the fourth side 14 facing or contacting the third side 13 at a predetermined interval.

  If parallelogram sheet pieces are used, when manufacturing a plurality of sliding members using a plurality of sheet pieces having the same shape cut out from one large area sheet, heat is applied to each sheet piece. By making the pressure bonding conditions and the winding direction the same, variations in the dimensions of the sliding layer of the resulting sliding member are reduced. In addition, even if there are variations in the thermocompression bonding conditions or the size and material of the sheet pieces, a desired sliding layer can be formed on the outer peripheral surface of the substrate by giving a predetermined angle in the winding direction. it can.

  In each of the above manufacturing methods, since the positions of the third side 13 and the fourth side 14 can be adjusted only by slightly adjusting the winding direction, the width W ′ of the sliding layer is large. There is no change.

FIG. 7 is a plan view of a parallelogram sheet piece in which the angle θ ₁ formed by the shorter diagonal line 119 and the first side 111 and the angle θ ₁ formed by the diagonal line 119 and the second side 112 exceed 90 °. And the perspective view before winding this sheet piece around a base material is shown. The parallelogram sheet piece 100 is partitioned by a first side 111 and a second side 112 that are parallel to each other, and a third side 113 and a fourth side 114 that are parallel to each other. The first side 111 and the length L ₁ of the second side 112 substantially equal to the circumferential length L 'of the substrate 9, the distance W ₁ of the first side 111 parallel to each other and the second side 112 slides It is approximately equal to the layer width W ′. The third side 113 and the fourth side 114 are inclined with respect to a direction perpendicular to the first side 111 (that is, a direction perpendicular to the second side 112). Here, the width W ′ of the sliding layer is the width of the sliding layer extending in the axial direction of the base material in the sliding member obtained by the manufacturing method of the sliding member of the present invention.

Also in the sheet piece 100, if the length L ₁ of the sheet piece 100 is L ₁ = 2πr, the direction parallel to the first side 111 and the second side 112 of the sheet piece 100 (the “length direction” of the sheet piece 100). And the winding diameter when the winding is performed so that the third side 113 and the fourth side 114 are in contact with each other with an angle φ between the winding direction and the winding direction. Further, the winding diameter when the sheet piece 100 is wound so that the third side 113 and the fourth side 114 are in contact with each other with an angle −φ between the length direction and the winding direction of the sheet piece 100 is reduced. Therefore, the dimension in the direction matching the circumferential direction of the base material of the sheet piece 100 is easily adjusted by fine adjustment in the winding direction.

  Therefore, in the manufacturing method of the sliding member of the present invention, the direction parallel to the first side 111 and the second side 112 of the sheet piece 100 (the length direction of the sheet piece 100) coincides with the substantially circumferential direction of the substrate 9. Let In order to make the length direction of the sheet piece 100 and the substantially circumferential direction of the base material 9 coincide with each other, the sheet piece 100 is made to have a predetermined angle in the length direction of the sheet piece 100 with respect to the circumferential direction of the base material 9. The direction of winding around the material 9 may be finely adjusted. At this time, it is desirable that the length direction of the sheet piece 100 is slightly inclined with respect to the circumferential direction of the base material 9, and in some cases, both directions coincide with each other. Since the sheet piece 100 is a parallelogram, the dimensions of the sheet piece 100 are changed by heating or pressurization by finely adjusting the winding direction and winding the sheet piece 100 around the substrate 9 one or more times. However, the third side 113 and the fourth side 114 can be brought into contact with each other or opposed to each other at a predetermined interval. Note that the winding direction of the sheet piece 100 may be finely adjusted in advance in consideration of the deformation amount of the sheet piece 100 according to the heating and pressurizing conditions during thermocompression bonding.

  Further, in the manufacturing method of the sliding member of the present invention, the direction parallel to the first side 111 and the second side 112 of the sheet piece 100 (the length direction of the sheet piece 100) and the circumferential direction of the base material 9 are matched. Then, the substrate 9 may be wound one or more times from the third side 113 side. At this time, the winding direction is finely adjusted so that the third side 113 and the fourth side 114 are opposed to each other at a predetermined position. Since the sheet piece 100 has the above-described shape, the sheet piece 100 is in a state in which the length direction of the sheet piece 100 is slightly inclined with respect to the circumferential direction of the base material 9 (that is, the winding direction is finely adjusted). It is easy to adjust the dimension of the sheet piece 100 that coincides with the circumferential direction of the substrate. Specifically, when the base material 9 and / or the sheet piece 100 is heated and the sheet piece 100 is wound around the base material 9 from the third side 113 side and thermocompression bonded, the thermocompression bonding has already been performed. By finely adjusting the winding direction according to the position of the third side 113, the third side 113 and the fourth side 114 are aligned on the same line as shown in FIG. As shown in FIG. 9, it is easy to make contact with each other with a gap 115 having a predetermined width between the third side 113 and the fourth side 114. In this way, the sheet piece 100 is wound around the substrate 9 one or more times with the fourth side 114 facing or abutting the third side 113 at a predetermined interval.

  If parallelogram sheet pieces are used, when manufacturing a plurality of sliding members using a plurality of sheet pieces having the same shape cut out from one large area sheet, heat is applied to each sheet piece. By making the pressure bonding conditions and the winding direction the same, variations in the dimensions of the sliding layer of the resulting sliding member are reduced. Further, even if there are variations in the thermocompression bonding conditions or the size and material of the sheet pieces, a desired sliding layer can be formed on the outer peripheral surface of the substrate by finely adjusting the winding direction.

  In each of the above manufacturing methods, since the positions of the third side 113 and the fourth side 114 can be adjusted only by slightly adjusting the winding direction, the width W ′ of the sliding layer is large. There is no change.

  The gap 15 and the gap 115 having a predetermined interval become oil retaining grooves for retaining lubricating oil in the sliding layer. FIG. 6 is a cross-sectional view taken along the line X-X ′ in FIG. 5, and is a partially enlarged view showing a groove portion. The gap 15 constitutes a groove portion with the end surfaces of the third side 13 and the fourth side 14 of the thick sheet piece 10 as wall surfaces and the outer peripheral surface of the base material 9 where the sheet piece 10 is exposed without being thermocompression bonded as the bottom surface. To do. In other words, the manufacturing method of the sliding member of the present invention is opposed to the third side and the fourth side with a predetermined interval, and is divided by the outer peripheral surface, the third side, and the fourth side of the substrate. An oil retaining groove can be formed. The oil retaining groove affects the slidability if the groove width is not constant or the groove width is extremely wide. According to the method for manufacturing a sliding member of the present invention, the distance between the third side and the fourth side can be easily adjusted to a groove width suitable as an oil retaining groove.

Moreover, in the manufacturing method of the sliding member of this invention, let a resin sheet be a strip | belt-shaped sheet which has a level | step-difference part in both ends. FIG. 10 shows a plan view of the belt-like sheet and a perspective view before the belt-like sheet is wound around the base material. In the belt-like sheet 20, the length L ₂ of two parallel sides (side 21 and side 22) is substantially equal to the circumferential length L ′ (= 2πr) of the substrate 9, distance W ₂ between the sides 22 is equal to the width W 'of the sliding layer. And the strip | belt-shaped sheet | seat 20 has the level | step-difference part 26 and 26 'which has a pair of short side 23 and 23' parallel to the side 21 and the side 22 at the both ends. In addition, although a pair of short side 23 and short side 23 'are each located in the one end part and other end part of the strip | belt-shaped sheet | seat 20, both are located on the same straight line. That is, the short sides 23 and 23 'are located at the same distance from the side 21 (or the side 22). The length L ₂ of the side edges 21 and side edge 22 parallel to the direction of the belt-like sheet 20 is substantially equal to the circumferential length L. However, among the lengths in the direction parallel to the side edges 21 and 22 of the belt-like sheet 20, the length including the short sides 23 and 23 ′ is short when the belt-like sheet 20 is wound around the substrate 9. since contact with for more than around the periphery of the substrate 9, it is longer than L _2. Here, in the end portion 26 and the end portion 26 ′, two sets of end sides 28 and 28 ′ that are continuous with the side 23 and the side 23 ′ and the end sides 29 and 29 ′ are perpendicular to the side 21 and the side 22. Or may be inclined.

  The belt-like sheet 20 is wound around the outer peripheral surface of the base material 9 substantially once by making the direction parallel to the side edge 21 and the side edge 22 coincide with the circumferential direction of the base material 9. At this time, both ends are opposed to each other and the pair of short sides 23 and 23 'abut. For example, when the belt-like sheet 20 is wound around the base material 9 from the end 26 side with the length direction of the belt-like sheet 20 aligned with the circumferential direction of the base material 9, the belt-like sheet 20 is not easily deformed in the width direction. The short side 23 and the short side 23 ′ are in contact with each other regardless of expansion and contraction in the length direction of the belt-like sheet 20, as shown in a side view in FIG. That is, since at least a part of both end portions are in contact with each other regardless of the length of the belt-like sheet, it is possible to avoid the generation of a gap continuous in the axial direction of the base material. Therefore, the sealing performance in the axial direction of the sliding member is enhanced. Such a sliding member is optimal as a piston for a compressor.

Moreover, although said strip | belt-shaped sheet | seat 20 has a pair of short side 1 each in an edge part, a strip | belt-shaped sheet | seat may have a pair or more short side. As a specific example of the belt-like sheet having two pairs of short sides, a plan view thereof is shown in FIG. The belt-like sheet 220 shown in FIG. 12 has stepped portions 26 and 26 ′ of the belt-like sheet 20 shown in FIG. Specifically, the length L ₂ of the side 221 and the side 222 parallel to each other is substantially equal to the circumferential length L ′ of the base material 9, and the distance W ₂ between the side 221 and the side 222 is slid. It is equal to the dynamic layer width W ′. The belt-like sheet 220 has step portions 226 and 226 ′ having short sides 223 and 223 ′, short sides 224 and short sides 224 ′ parallel to the side 221 and the side 222 at both ends. That is, the step portions 226 and 226 ′ have short sides 223 and 223 ′ and short sides 224 and 224 ′ parallel to the side 221 and the side 222, respectively, and these sides are three sets of end sides parallel to each other. 227 and 227 ′, end sides 228 and 228 ′ and end sides 229 and 229 ′ are continuous. The length _{L 2} of the side edges 221 and side edge 222 parallel to the direction of the belt-like sheet 220 is equal to the length of the generally circumferential.

  The belt-like sheet 200 is wound around the outer peripheral surface of the base material 9 substantially once by making the direction parallel to the side 221 and the side side 222 coincide with the circumferential direction of the base material 9. At this time, both ends are opposed to each other, and the pair of short side 223 and short side 223 'and short side 224 and short side 224' contact each other. That is, at least a part of both end portions can be in contact with each other regardless of the length of the belt-like sheet.

  Further, in the belt-like sheet described so far, since the pair of short sides are located at the same distance from one side, the short sides are located on the same straight line, but are located at different distances from one side. Also good. As a specific example of a belt-like sheet in which a pair of short sides are located at different distances from one side, a plan view thereof is shown in FIG. The belt-like sheet 200 in FIG. 13 is the same as the belt-like sheet 20 in FIG. 10 except that the position of the step portion is changed. Specifically, the positions of the short sides 230 and 230 ′ of the belt-like sheet 200 are different in the width direction from the short sides 23 and 23 ′ of the belt-like sheet 20. Therefore, the length of the belt-like sheet in the direction parallel to the side is not equal to the length of the circumference in the range sandwiched by the straight line including the short side of the belt-like sheet. FIG. 14 is a side view of the belt-like sheet 200 wound around the base material 9. When the belt-like sheet 200 is wound around the base material 9, the short side 230 and the short side 230 'of the belt-like sheet 200 face each other with a predetermined gap 250 (FIG. 14).

  Also in the manufacturing method of the sliding member of the present invention, as in the gap 250 in FIG. 14, the pair of short sides 230 and 230 ′ are opposed to each other with a predetermined interval to form an oil holding groove for holding the lubricating oil. Can be formed. The oil retaining groove affects the slidability if the groove width is not constant or the groove width is extremely wide. According to the method for manufacturing a sliding member of the present invention, the gap extending in the circumferential direction of the substrate can be easily adjusted to a groove width suitable as an oil retaining groove. Such a sliding member is optimal as a drive shaft for engines, motors, compressors, and the like.

  There is no particular limitation on the method of thermocompression bonding the resin sheet, and the resin sheet is fixed to the outer peripheral surface of the substrate by pressing at least the surface portion of the resin sheet that is in contact with the substrate while being heated to an appropriate temperature. it can. There are no particular limitations on the temperature and pressure conditions, and the conditions may be appropriately selected according to the material of the resin sheet. For example, as a temperature condition, it is good to hold | maintain the temperature of the grade which the elasticity modulus of the surface part which contacts at least a base material of a resin sheet falls moderately, and shows fluidity | liquidity suitable for adhesion | attachment. In order to heat at least the surface portion of the resin sheet that contacts the base material, the resin sheet itself may be heated, at least the outer peripheral surface side of the base material may be heated, or both the resin sheet and the base material may be heated. May be heated.

  In addition, the resin sheet may be heated and pressure-bonded after being heated on the substrate and / or the resin sheet, and then heated while being pressed after being wound on the substrate. May be thermocompression bonded. Regarding thermocompression bonding, an optimal method may be selected in accordance with the shape and material of the resin sheet and the substrate. For example, if the resin sheet is a parallelogram sheet piece, at least the sheet piece is preheated so that a part of the sheet piece previously wound on the substrate is thermocompression-bonded and sequentially wound. The winding direction of the remaining sheet piece can be finely adjusted easily.

  Moreover, there is no limitation in particular in the method of winding a resin sheet. For example, by placing a base material and a resin sheet on a temperature adjustable stage and moving the stage (resin sheet) and the base material relative to each other, the resin sheet is wound around the outer peripheral surface of the base material. Is done. At this time, since the substrate has a circular cross section, it moves while rotating. Furthermore, thermocompression bonding is possible by pressing the substrate against the stage. At this time, the winding direction is changed by changing the direction in which the stage and the base material relatively move, and a slight angle is formed between the length direction of the resin sheet (sheet piece) and the circumferential direction of the base material. Tweaked. In addition, when the resin sheet (sheet piece) is wound around the substrate while applying tension, the winding direction is finely adjusted by changing the direction in which the tension is applied.

  As mentioned above, although embodiment of the manufacturing method of the sliding member of this invention was described, this invention is not limited to the said embodiment. The present invention can be implemented in various forms without departing from the gist of the present invention, with modifications and improvements that can be made by those skilled in the art.

  Based on the said embodiment, the resin sheet was thermocompression-bonded to the surface of the base material, and the sliding member was produced. The manufacturing method of the sliding member of this invention is shown below.

  A round bar (S45C steel) having a diameter of 20 mm was used as the substrate. The outer peripheral surface of the base material was shot blasted so that the surface roughness was 4 to 5 μm Rz. The sliding layer was formed in the outer peripheral surface of a base material with the following procedures.

[Comparative Example 1]
To a PAI resin varnish obtained by dissolving polyamideimide (PAI) resin in n-methyl-2-pyrrolidone, molybdenum disulfide and graphite are added as a solid lubricant and stirred, and then kneaded by passing three rolls twice. A coating solution was obtained. The solid content was adjusted to 70 wt% PAI resin, 20 wt% molybdenum disulfide, and 10 wt% graphite.

  This coating solution was sprayed by air spray to attach a coating film having a thickness of 20 μm to the outer peripheral surface of the substrate. Then, it baked at 180 degreeC for 90 minutes, the sliding layer was formed in the outer peripheral surface of a base material, and the sliding member was obtained.

  The surface roughness of the sliding surface (the surface of the sliding layer) of the obtained sliding member was 2.2 μmRz.

[Reference Example 1]
As a resin film, a PEEK resin film (thickness: 50 μm) cut out in a rectangular shape with a strip shape longer than the circumference of the substrate was prepared. The base material was heated to 370 ° C., and a PEEK resin film was applied to the outer peripheral surface of the base material while being pressed against the base material, followed by thermocompression bonding to obtain a sliding member. The portion that remained without adhering to the outer peripheral surface of the substrate was trimmed with a cutter.

  The surface roughness of the sliding surface (the surface of the sliding layer) of the obtained sliding member was 0.2 μm Rz.

[Reference Example 2]
As the resin film, a laminated film (thickness: 50 μm) cut out in a rectangular shape with a strip shape longer than the circumferential length of the substrate was prepared. The laminated film consisted of two layers of a surface layer made of PEEK resin and an adhesive layer made of PEEK resin and PEI resin, and was produced by coextrusion. The base material was heated to 270 ° C., and with the adhesive layer being in contact with the outer peripheral surface of the base material, the laminated film was heated and pressed under pressure against the base material to obtain a sliding member. The portion that remained without adhering to the outer peripheral surface of the substrate was trimmed with a cutter.

  The surface roughness of the sliding surface (the surface of the sliding layer) of the obtained sliding member was 0.3 μm Rz.

[Evaluation]
Using a journal testing machine, the slidability of the sliding members produced by the procedures of Comparative Example 1 and Reference Examples 1 and 2 was evaluated. Lubricating oil was applied to the sliding surface, and the test conditions were a sliding speed of 6.0 m / sec, a load of 2000 N, and a test time of 20 seconds.

  When the surface of the sliding member after the test was visually confirmed, the sliding member produced in Reference Examples 1 and 2 showed no wear on the sliding layer. On the other hand, in the sliding member produced in Comparative Example 1, the sliding layer was greatly worn. That is, a sliding member having a sliding layer formed by thermocompression bonding of a resin film was excellent in slidability. This is because the resin film having a smooth surface was thermocompression bonded without losing smoothness even after being fixed to the surface of the substrate as a sliding layer.

[Comparative Example 2]
As a resin film, a rectangular PEEK resin film (thickness: 50 μm) having a pair of opposing sides equal in length to the circumference of the substrate was prepared. An epoxy adhesive was applied to one surface of the rectangular PEEK resin film. On the other hand, the substrate was heated to 120 ° C. The base material is arranged on the PEEK resin film so that the longitudinal direction of the PEEK resin film is perpendicular to the axial direction of the base material, and the base material is rotated while pressing the base material against the PEEK resin film. The PEEK resin film was wound around the outer peripheral surface of the material and wound. At this time, the PEEK resin film was wound so that the surface on which the adhesive was applied was positioned on the substrate side. Thus, the PEEK resin film was thermocompression bonded to the surface of the base material to obtain a sliding member.

  Even if the winding direction is finely adjusted when the PEEK resin film is wound, it is difficult to adjust the distance between the two sides that are wound and face each other to an arbitrary constant width.

[Example 1]
As the resin film, a rhombus PEEK resin film (thickness: 50 μm) having a side length equal to the circumferential length of the base material and a pair of opposite corners of 30 ° was prepared. An epoxy adhesive was applied to one surface of the rhombus PEEK resin film. On the other hand, the substrate was heated to 120 ° C. The base material is arranged on the PEEK resin film so that the longitudinal direction of the PEEK resin film is perpendicular to the axial direction of the base material, and the base material is rotated while pressing the base material against the PEEK resin film. The PEEK resin film was wound around the outer peripheral surface of the material and wound. At this time, the PEEK resin film was wound so that the surface on which the adhesive was applied was positioned on the substrate side. Thus, the PEEK resin film was thermocompression bonded to the surface of the base material to obtain a sliding member.

  By finely adjusting the winding direction when winding the PEEK resin film, the distance between the two sides that are wound and facing each other can be easily adjusted to any fixed width regardless of the amount of expansion or contraction in the circumferential direction of the film. We were able to.

[Example 2]
A belt-like PEEK resin film (thickness: 50 μm) was prepared as the resin film. This PEEK resin film had the same shape as the strip film 20 shown in the upper diagram of FIG. The length L ₂ of the band-like PEEK resin film is equal to the length of the circumferential direction of the substrate, the length of the short side 23 and 23 'at a distance equal to the sides 21 and 22 was set to 15 mm. An epoxy adhesive was applied to one side of the belt-like PEEK resin film. On the other hand, the substrate was heated to 120 ° C. The base material was rotated while pressing the base material against the PEEK resin film, and the PEEK resin film was wound around the outer peripheral surface of the base material and wound. At this time, the PEEK resin film was wound so that the surface on which the adhesive was applied was positioned on the substrate side. Thus, the PEEK resin film was thermocompression bonded to the surface of the base material to obtain a sliding member.

  Regardless of the amount of expansion and contraction in the circumferential direction of the film, the short side 23 and the short side 23 'could be positioned on the same circumference and brought into contact with each other (FIG. 11).

A top view of a resin sheet and a perspective view before winding a resin sheet around a substrate are shown. It is a side view of the sliding member which wound the sheet piece around the base material with an angle φ between the length direction of the sheet piece and the circumferential direction (winding direction) of the base material. It is a side view of the sliding member which wound the sheet piece on the base material with an angle −φ in the length direction of the sheet piece and the circumferential direction (winding direction) of the base material. It is a side view of the sliding member which wound the sheet piece around the base material in a state where the two opposing sides are matched and the sheet piece is in contact with no gap. It is a side view of the sliding member which wound the sheet piece around the base material in a state where a gap having a predetermined width is provided between two opposing sides. FIG. 6 is a cross-sectional view taken along line X-X ′ of FIG. 5, and is a partially enlarged view showing a groove portion. A top view of a resin sheet and a perspective view before winding a resin sheet around a substrate are shown. It is a side view of the sliding member which made the sheet piece contact without gap so that two sides which a sheet piece opposes may contact, and wound the sheet piece on the substrate. It is a side view of the sliding member which wound the sheet piece around the base material with a gap having a predetermined width between two opposing sides of the sheet piece. The top view of a strip | belt-shaped sheet | seat and the perspective view before winding this strip | belt-shaped sheet around a base material are shown. It is a side view of the sliding member which wound the strip | belt-shaped sheet | seat which shows a top view in FIG. 10 on the base material. The top view of a strip shaped sheet is shown. The top view of a strip shaped sheet is shown. In addition, the top view of the strip | belt-shaped sheet | seat of FIG. 10 is shown collectively with a dotted line. It is a side view of the sliding member which wound the strip | belt-shaped sheet | seat which shows a top view in FIG. 13 on the base material.

Explanation of symbols

9: Base material 10, 100: Sheet piece (resin sheet)
11, 111: First side 12, 112: Second side 13, 113: Third side 14, 114: Fourth side 20, 200, 220: Belt-like sheet (resin sheet)
21, 22, 221, 222, 210, 220: Sides 23, 23 ′, 223, 223 ′, 224, 224 ′, 230, 230 ′: Short sides 26, 26 ′, 226, 226 ′, 260, 260 ′ : Stepped part

Claims (15)

A manufacturing method of a sliding member comprising: a base material having a circular cross section; and a sliding layer formed of a resin sheet thermocompression bonded to at least a part of the outer peripheral surface of the base material,
The resin sheet is parallel to each other and has a substantially circumferential length of the base material and a first side and a second side that are substantially equal in distance to the width of the sliding layer, and are parallel to each other on the first side. A parallelogram sheet piece partitioned by a third side and a fourth side inclined with respect to the vertical direction,
A direction parallel to the first side and the second side of the sheet piece with respect to the circumferential direction of the base material is given a predetermined angle so that the direction parallel to the first side and the second side of the sheet piece The sheet piece is wound substantially once or more than once around the substrate so as to coincide with the substantially circumferential direction of the substrate, and the third side and the fourth side are brought into contact with each other or opposed to each other at a predetermined interval. A method for manufacturing a sliding member.   The said resin sheet is a manufacturing method of the sliding member of Claim 1 which heats the said base material and / or this resin sheet, and is wound and thermocompression-bonded, pressing to this base material.   The method for manufacturing a sliding member according to claim 1, wherein the resin sheet is heated and pressure-bonded while being pressurized after being wound around the base material. A manufacturing method of a sliding member comprising: a base material having a circular cross section; and a sliding layer formed of a resin sheet thermocompression bonded to at least a part of the outer peripheral surface of the base material,
The resin sheet is parallel to each other and has a substantially circumferential length of the base material and a first side and a second side that are substantially equal in distance to the width of the sliding layer, and are parallel to each other on the first side. A parallelogram sheet piece partitioned by a third side and a fourth side inclined with respect to the vertical direction,
The base sheet and / or the resin sheet is heated so that the direction parallel to the first side and the second side of the sheet piece matches the circumferential direction of the base piece, and then the sheet piece is Winding the sheet piece from the third side to the base material so that the fourth side is in contact with the third side or facing the third side at a predetermined interval, and the sheet piece is wound around the base material substantially once or more than once. A method for manufacturing a sliding member. A manufacturing method of a sliding member comprising: a base material having a circular cross section; and a sliding layer formed of a resin sheet thermocompression bonded to at least a part of the outer peripheral surface of the base material,
A step having at least a pair of short sides on the resin sheet, the distance between two parallel sides being equal to the width of the sliding layer, and being parallel to the sides and located on the same straight line at both ends. And a belt-like sheet having a length in a direction parallel to the side except the length including the short side is equal to the length of the substantially circumference of the substrate,
A direction parallel to the side edge is made coincident with a circumferential direction of the base material, and the belt-like sheet is wound around the base material substantially once so that the both end portions face each other and a pair of the short sides are brought into contact with each other. A method for manufacturing a sliding member. A manufacturing method of a sliding member comprising: a base material having a circular cross section; and a sliding layer formed of a resin sheet thermocompression bonded to at least a part of the outer peripheral surface of the base material,
The resin sheet has at least a pair of distances between two sides parallel to each other equal to the width of the sliding layer, parallel to the sides and at different distances from one of the sides. A strip-like sheet having a step portion having a short side and having a length in a direction parallel to the side excluding a range sandwiched between straight lines including the short side is equal to the length of the substantially circumference of the base material,
The belt-like sheet is wound around the base material so that the direction parallel to the side edge coincides with the circumferential direction of the base material so that both ends are opposed to each other and the pair of short sides are opposed at a predetermined interval. A manufacturing method of a sliding member, characterized by comprising:   The said resin sheet is a manufacturing method of the sliding member of Claim 5 or 6 which heats the said base material and / or this resin sheet, and is wound and thermocompression-bonded while pressing to this base material.   The said resin sheet is a manufacturing method of the sliding member of Claim 5 or 6 heated and heat-pressed, applying pressure, after being wound around the said base material.   The said resin sheet is a manufacturing method of the sliding member in any one of Claims 1-8 containing polyaryl ketone resin in a surface layer part at least. The resin sheet, an adhesive layer containing a thermoplastic polyimide resin and polyaryl ketone resin, a sliding member according to claim 9, wherein a surface layer containing a polyaryl ketone resin is laminated on the adhesive layer, a laminated sheet consisting of Manufacturing method.   The method for manufacturing a sliding member according to claim 9 or 10, wherein the polyaryl ketone resin is a polyether ether ketone resin.   An oil retaining groove that holds the lubricating oil that is opposed to the third side and the fourth side with a predetermined interval and that is partitioned by the outer peripheral surface of the base material, the third side, and the fourth side. The manufacturing method of the sliding member of Claim 1 or 4 which forms in this sliding layer.   The manufacturing method of the sliding member according to claim 6, wherein an oil holding groove that is partitioned by at least the outer peripheral surface of the base material and the pair of short sides and holds lubricating oil is formed in the sliding layer. The substrate mainly includes a housing having a suction chamber, a discharge chamber, and a cylinder bore, a drive shaft rotatably supported by the housing, a swash plate that can rotate in synchronization with the drive shaft, and a shoe on the swash plate. A piston that is moored and reciprocates in the cylinder bore according to the inclination angle of the swash plate to form a compression chamber, a rotary valve that rotates in synchronization with the drive shaft and communicates the compression chamber with the suction chamber; method for producing a sliding member according to any one of claims 1 to 13 which is a drive shaft, piston or rotary valve of a compressor equipped with. The sliding member obtained by the manufacturing method of the sliding member of Claim 12 or 13 .

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