WO2015141086A1 - Piston ring and metal rectangular wire for piston ring - Google Patents

Piston ring and metal rectangular wire for piston ring Download PDF

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Publication number
WO2015141086A1
WO2015141086A1 PCT/JP2014/083842 JP2014083842W WO2015141086A1 WO 2015141086 A1 WO2015141086 A1 WO 2015141086A1 JP 2014083842 W JP2014083842 W JP 2014083842W WO 2015141086 A1 WO2015141086 A1 WO 2015141086A1
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Prior art keywords
polishing
piston ring
along
pair
wire
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PCT/JP2014/083842
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French (fr)
Japanese (ja)
Inventor
康裕 向井
啓悟 蓮見
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サンコール株式会社
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Priority to CN201480003690.4A priority Critical patent/CN105143733B/en
Publication of WO2015141086A1 publication Critical patent/WO2015141086A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/12—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction

Definitions

  • the present invention relates to a piston ring attached to a piston in an engine and a metal rectangular wire for manufacturing the piston ring.
  • the piston ring is a member in which a metal rectangular wire is formed in a C shape in a plan view, and is used by being fitted into a ring groove formed on the outer peripheral surface of the piston (see Patent Document 1 below).
  • the piston ring having a C-shape in plan view is slidably in contact with an inner peripheral surface of a cylinder in which the piston is reciprocally moved to ensure sealing between the piston and the cylinder, and is attached to the piston.
  • the outer surface of the upper surface the lower surface, the inner surface (the radially inner surface facing the direction of the piston) and the outer surface (the radially outer surface that is in sliding contact with the inner circumferential surface of the cylinder). It is necessary to finish the surface roughness particularly finely.
  • the piston ring first forms the upper surface, the lower surface, the inner side surface, and the outer side surface in the state of forming four surfaces in a long metal rectangular wire, that is, in a C-shape in a plan view.
  • the upper surface forming surface, the lower surface forming surface, the inner surface forming surface, and the outer surface forming surface are polished, and then the long rectangular metal wire is bent into a C shape in plan view.
  • the outer surface forming surface As described above, in the piston ring, it is necessary to form the outer surface smoothly. That is, when polishing the long metal rectangular wire, the outer surface forming surface has a surface roughness smaller than the surface roughness of the other three surfaces, and Thereafter, when the long metal rectangular wire is bent into a C-shape in plan view, the outer surface forming surface needs to be formed so as to form an outer surface that faces radially outward. is there.
  • At least one outer surface such as the upper surface forming surface or the lower surface forming surface is colored on the long metal rectangular wire after polishing and before bending.
  • marking is performed by plastic deformation such as a dent.
  • this conventional configuration requires a separate process such as a color removal process or a plastic deformation correction process after the bending process, resulting in high costs.
  • the present invention has been made in view of such a conventional technique, and without adding a separate process, in a stage before bending a metal flat wire into a C-shape in a plan view, it is radially outward after bending. It is an object of the present invention to provide a piston ring that can identify the outer surface facing the surface, thereby reducing the manufacturing cost, and a metal rectangular wire for manufacturing the piston ring.
  • the present invention provides a C-shaped piston ring in plan view from a rectangular metal wire, the upper surface facing upward, the lower surface facing downward based on the state of being attached to the piston,
  • a piston ring having four outer surfaces including an inner surface facing radially inward and an outer surface facing radially outward, wherein one of the four outer surfaces is preliminarily specified as another outer surface.
  • a piston ring is provided in which an abrasive line is formed along a direction different from the abrasive line in FIG.
  • the piston ring according to the present invention since one of the four outer surfaces is preliminarily specified with a polishing streak along a direction different from the polishing streak on the other outer surface, Without adding a process, it is possible to identify the outer surface facing outward in the radial direction after bending, before bending the metal rectangular wire into a C-shape in plan view. Costs can be reduced as much as possible.
  • the rectangular wire has a rectangular shape whose cross-sectional shape is defined by a pair of long sides and a pair of short sides, and an outer surface including each of the pair of long sides forms the upper surface and the lower surface.
  • the outer surface including each of the pair of short sides forms the inner side surface and the outer side surface.
  • the one outer surface specified in advance is one of the upper surface and the lower surface, and one of the upper surface and the lower surface is formed with a polishing line along a first direction, and the upper surface and On the other side of the lower surface, polishing streaks are formed along a second direction different from the first direction.
  • the first direction is a direction inclined by a predetermined angle with respect to the longitudinal direction of the rectangular wire
  • the second direction is a direction along the longitudinal direction
  • the present invention is a piston ring metal rectangular wire for manufacturing a C-shaped piston ring to be mounted on a piston in plan view.
  • One specified outer surface is provided with a metal square wire for a piston ring in which polishing bars along a direction different from the polishing bars on the other outer surface are formed.
  • one of the four outer surfaces is formed with a polishing streak along a direction different from the polishing streak on the other outer surface. Therefore, it is possible to identify the outer surface facing outward in the radial direction after bending at the stage before bending the metal rectangular wire into a C-shape in plan view without adding another process. Thereby, the manufacturing cost of the piston ring can be reduced as much as possible.
  • the cross-sectional shape is a rectangular shape defined by a pair of long sides and a pair of short sides, and an outer surface including each of the pair of long sides is an upper surface facing upward when mounted on the piston And an upper surface forming surface and a lower surface forming surface that form a lower surface facing downward, and an outer surface that includes each of the pair of short sides is an inner surface that faces radially inward and a radially outer surface when mounted on the piston.
  • the inner side surface forming surface and the outer side surface forming surface that form the exterior surface facing in the direction are used.
  • the one specified outer surface is one of the upper surface forming surface and the lower surface forming surface, and one of the upper surface forming surface and the lower surface forming surface is polished along a first direction. A streak is formed, and a polishing streak along a second direction different from the first direction is formed on the other of the upper surface forming surface and the lower surface forming surface.
  • the first direction is a direction inclined by a predetermined angle with respect to the longitudinal direction of the rectangular wire
  • the second direction is a direction along the longitudinal direction
  • FIG. 1 is a plan view of a piston ring according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG. 3 is a perspective view of a rectangular metal wire used for manufacturing the piston ring shown in FIG.
  • FIG. 4 is an image showing an example of the polishing streak along the direction inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire.
  • FIG. 5 is an image showing an example of the polishing streak along the direction orthogonal to the longitudinal direction of the flat wire.
  • FIG. 6 is an image showing an example of the polishing streak along the longitudinal direction of the rectangular wire.
  • FIGS. 8A and 8B are schematic diagrams for explaining a polishing process using the polishing apparatus of the second example, which is a polishing process when the piston ring is manufactured.
  • FIGS. 9A and 9B are schematic views for explaining a polishing process using the polishing apparatus of the second example, which is a polishing process when manufacturing the piston ring.
  • (B) and (b) show the case where the direction of the polishing streak generated in the polishing step is inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire, and the case where the direction is perpendicular thereto.
  • FIG. 1 and 2 show a plan view of the piston ring 1 according to the present embodiment and a cross-sectional view taken along the line II-II in FIG. 1, respectively.
  • the piston ring 1 is a member that is attached to the outer peripheral surface of a piston of an engine and that is in sliding contact with the inner peripheral surface of a cylinder in which the engine is reciprocably accommodated.
  • the piston ring 1 has a C-shape in plan view, and the upper surface 11 facing upward, the lower surface 12 facing downward, based on the state of being mounted on the piston, It has an inner surface 13 that faces radially inward and an outer surface 14 that faces radially outward.
  • the piston ring 1 is manufactured using a long metal rectangular wire 50 having a rectangular cross section.
  • FIG. 3 is a perspective view of the metal rectangular wire 50.
  • the metal rectangular wire 50 for example, a stainless steel material, a casting material, a cast steel material, a steel material, or the like is used.
  • the metal rectangular wire 50 includes an upper surface forming surface 51, a lower surface forming surface 52, and an inner surface forming surface that form the upper surface 11, the lower surface 12, the inner surface 13, and the outer surface 14, respectively. 53 and an outer surface forming surface 54.
  • the piston ring 1 performs predetermined polishing on the four outer surfaces 51 to 54 of the metal flat wire 50, and thereafter, the metal flat wire 50 is bent into a C shape in plan view. Manufactured.
  • the piston ring 1 is in sliding contact with the inner peripheral surface of the cylinder on the outer surface 14. Therefore, in the piston ring 1, it is necessary to make the surface roughness of the outer surface 14 finer than the surface roughness of the other upper surface 11, the lower surface 12 and the inner surface 13.
  • the outer surface forming surface 54 is subjected to a polishing process for the metal rectangular wire 50. Is made finer than the surface roughness of the upper surface forming surface 51, the lower surface forming surface 52 and the inner surface forming surface 53, and the metal rectangular wire 50 thus polished is used as the outer surface forming surface. It is necessary to bend and mold in a C shape in plan view so that 54 faces radially outward.
  • marking is performed on the outer surface of any one of the long metal rectangular wires by plastic deformation such as coloring or dent, and the outer surface is bent by this marking after bending. It is also possible to identify the outer surface to be formed.
  • a polishing bar along a direction different from the polishing bar on the other outer surface is provided on one outer surface specified in advance among the four outer surfaces. Is formed.
  • the polishing streak along a direction different from the other outer surface is, for example, a polishing streak along a direction inclined by a predetermined angle with respect to the longitudinal direction of the flat wire 50 (see FIG. 4), or A polishing bar (see FIG. 5) along a direction orthogonal to the longitudinal direction of the flat wire 50 can be used.
  • the outer surface forming surface 54 that should form the outer surface 14 after bending is subjected to a polishing process on the rectangular wire 50 without adding another process, and It can be identified at a stage before the bending process.
  • the metal rectangular wire 50 can be bent so that the outer surface forming surface 54 forms the outer surface 14, and the manufacturing cost of the piston ring 1 can be reduced as much as possible. Can do.
  • the metal rectangular wire 50 has a rectangular shape whose cross-sectional shape is defined by a pair of long sides 50 a and a pair of short sides 50 b,
  • the metal rectangular wire 50 is bent in an edgewise direction, that is, is bent so that one of the pair of short sides 50b is located radially inward, so that the piston ring having a C-shape in plan view is obtained. 1 is formed.
  • two outer surfaces each including a pair of long sides 50a among the four outer surfaces 51 to 54 in the metal rectangular wire 50 can be identified as the upper surface forming surface 51 and the lower surface forming surface 52
  • Two outer surfaces each including the pair of short sides 50b can be identified as the inner surface forming surface 53 and the outer surface forming surface 54.
  • one of the upper surface forming surface 51 and the lower surface forming surface 52 is formed with polishing streaks along the first direction, and the other of the upper surface forming surface and the lower surface forming surface is the first.
  • a polishing streak along a second direction different from the one direction can be formed.
  • the first direction is a direction inclined at an angle smaller than 90 degrees with respect to the longitudinal direction (see FIG. 4), and the second direction is a direction along the longitudinal direction (see FIG. 6). Can do.
  • the outer surface forming surface 54 can be more clearly identified at the stage before the bending by comparing the direction of the polishing bar of the upper surface forming surface 51 and the direction of the polishing bar of the lower surface forming surface 52. It can be done reliably.
  • the direction of the polishing streak generated in the polishing step will be described.
  • the rectangular wire 50 is extended in the longitudinal direction with the outer surface (surface to be polished) to be polished of the metal rectangular wire 50 facing a polishing device 70 (see FIGS. 7 to 9 below). This is performed by causing the polishing apparatus to act on the outer surface while being conveyed, and polishing streaks are formed on the surface to be polished during this polishing step.
  • the polishing apparatus 70 includes, for example, a rotating shaft 71 that is driven to rotate about an axis, and a substantially cylindrical polishing member 72 supported by the rotating shaft 71, and a polishing member 72 whose outer peripheral surface is a polishing surface. And can have
  • the rotating shaft 71 is in the conveying direction of the flat wire 50 with the outer peripheral surface of the polishing member 72 facing the surface to be polished of the flat wire 50.
  • the rotating shaft 71 is arranged so as to be orthogonal to each other, and in this state, the rotating shaft 71 is rotated around the axis line while the metal rectangular wire 50 is conveyed along the longitudinal direction, so that the polishing member 72 is covered with the object to be covered.
  • polishing streaks along the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
  • the rotating shaft 71 moves in the conveying direction of the flat wire 50 with the outer peripheral surface of the polishing member 72 facing the surface to be polished of the flat wire 50.
  • the rotating shaft 71 is disposed so as to be inclined at an angle smaller than 90 degrees, and in this state, the rotating shaft 71 is rotated around the axis while the metal rectangular wire 50 is conveyed along the longitudinal direction.
  • the rotating shaft 71 is parallel to the conveying direction of the flat wire 50 with the outer peripheral surface of the polishing member 72 facing the surface to be polished of the flat wire 50.
  • the rotating shaft 71 is arranged as described above, and in this state, while the metal rectangular wire 50 is conveyed along the longitudinal direction, the rotating shaft 71 is rotated about the axis to move the polishing member 72 to the surface to be polished.
  • polishing streaks along the direction orthogonal to the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
  • the polishing apparatus 70 is not limited to the configuration having the rotating shaft 71 and the polishing member 72.
  • the polishing apparatus 70 includes a support shaft 75 that is reciprocated along an axial direction, and a polishing member 76 that is supported by the support shaft 75, and a surface that faces the surface to be polished is a polishing surface. And a polishing member 76.
  • the support shaft 75 is arranged so that the support shaft 75 is parallel to the conveying direction of the flat wire 50 with the polishing surface of the polishing member 76 facing the surface to be polished of the flat wire 50.
  • the support shaft 75 is reciprocated along the axial direction to cause the polishing member 76 to act on the surface to be polished.
  • polishing streaks along the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
  • the support shaft 75 moves in the conveying direction of the flat wire 50 with the polishing surface of the polishing member 76 facing the surface to be polished of the flat wire 50.
  • the support shaft 75 is disposed so as to be inclined at an angle smaller than 90 degrees, and in this state, the support shaft 75 is reciprocated along the axial direction while the metal rectangular wire 50 is conveyed along the longitudinal direction.
  • the support shaft 75 moves in the conveying direction of the flat wire 50 with the polishing surface of the polishing member 76 facing the surface to be polished of the flat wire 50.
  • the support shaft 75 is disposed so as to be orthogonal to each other, and in this state, while the metal rectangular wire 50 is conveyed along the longitudinal direction, the support shaft 75 is reciprocated along the axial direction to polish the polishing member 76.
  • polishing streaks see FIG. 5 along the direction orthogonal to the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
  • the polishing apparatus 70 is wound around a driving roller 81 that is driven to rotate about an axis, a driven roller 82 that is arranged in parallel to the driving roller 81, and the driving roller 81 and the driven roller 82.
  • the endless polishing member 83 may be configured to have a polishing member 83 whose outer surface is a polishing surface.
  • the axial direction of the driving roller 81 and the driven roller 82 is orthogonal to the conveying direction of the flat wire 50 with the polishing surface of the polishing member 83 facing the surface to be polished of the flat wire 50.
  • the driving roller 81 and the driven roller 82 are arranged, and while the metal rectangular wire 50 is transported along the longitudinal direction, the driving roller 81 is driven to rotate about the axis, thereby the polishing member.
  • polishing streaks see FIG. 6 along the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
  • the axial directions of the driving roller 81 and the driven roller 82 are set so that the polishing surface of the polishing member 83 faces the surface to be polished of the flat wire 50.
  • the driving roller 81 and the driven roller 82 are arranged so as to be inclined at an angle smaller than 90 degrees with respect to the conveyance direction of the flat wire 50, and in this state, the metal flat wire 50 is conveyed along the longitudinal direction.
  • the drive roller 81 is driven to rotate about the axis to cause the polishing member 83 to act on the surface to be polished, whereby the surface to be polished has an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire 50.
  • a polishing streak (see FIG. 4) along the inclined direction can be formed.
  • the axial direction of the driving roller 81 and the driven roller 82 is the rectangular wire with the outer peripheral surface of the polishing member 83 facing the surface to be polished of the flat wire 50.
  • the driving roller 81 and the driven roller 82 are arranged so as to be parallel to the conveying direction of 50, and in this state, while driving the metal rectangular wire 50 along the longitudinal direction, the driving roller 81 is rotated around the axis.
  • the polishing member 83 is caused to act on the surface to be polished by rotationally driving the polishing member 83, so that the polishing surface along the direction perpendicular to the longitudinal direction of the rectangular wire 50 is provided on the surface to be polished (see FIG. 5). Can be formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

On one previously specified outer surface of the four outer surfaces of a rectangular wire for manufacturing a piston ring that is C-shaped in two-dimensional view, polishing lines are formed along a direction that differs from the polishing lines on the other outer surfaces. The cross-sectional shape of the rectangular wire has a rectangular shape delimited by a pair of long sides and a pair of short sides. When the outer surfaces comprising each of the pair of long sides form the upper surface and lower surface and the outer surfaces comprising each of the pair of short sides form the inside surface and the outside surface, polishing lines along a first direction can be formed on either the upper surface or the lower surface and polishing lines along a second direction differing from the first direction can be formed on the other of the upper surface and lower surface.

Description

ピストンリング及びピストンリング用金属製平角線Piston ring and metal rectangular wire for piston ring
　本発明は、エンジンにおけるピストンに装着されるピストンリング及び前記ピストンリングを製造する為の金属製平角線に関する。 The present invention relates to a piston ring attached to a piston in an engine and a metal rectangular wire for manufacturing the piston ring.
　ピストンリングは、金属製平角線が平面視Ｃ字状に成形された部材であり、ピストンの外周面に形成されたリング溝に嵌め込まれて使用される（下記特許文献１参照）。 The piston ring is a member in which a metal rectangular wire is formed in a C shape in a plan view, and is used by being fitted into a ring groove formed on the outer peripheral surface of the piston (see Patent Document 1 below).
　平面視Ｃ字状の前記ピストンリングは、前記ピストンが往復動自在に収容されるシリンダの内周面と摺接して前記ピストン及び前記シリンダ間の密閉性を担保するものであり、前記ピストンに装着された状態を基準にして、上面、下面、内側面（ピストンの方向を向く径方向内方面）及び外側面（前記シリンダの内周面に摺接する径方向外方面）のうちの前記外側面の表面粗さを特に細かく仕上げる必要がある。 The piston ring having a C-shape in plan view is slidably in contact with an inner peripheral surface of a cylinder in which the piston is reciprocally moved to ensure sealing between the piston and the cylinder, and is attached to the piston. Of the outer surface of the upper surface, the lower surface, the inner surface (the radially inner surface facing the direction of the piston) and the outer surface (the radially outer surface that is in sliding contact with the inner circumferential surface of the cylinder). It is necessary to finish the surface roughness particularly finely.
　ここで、前記ピストンリングは、まず、長尺の金属製平角線における４面、即ち、平面視Ｃ字状に形成した状態において、前記上面、前記下面、前記内側面及び前記外側面をそれぞれ形成する上面形成面、下面形成面、内側面形成面及び外側面形成面を研磨し、その後に、前記長尺の金属製平角線を平面視Ｃ字状に曲げ成形することによって形成される。 Here, the piston ring first forms the upper surface, the lower surface, the inner side surface, and the outer side surface in the state of forming four surfaces in a long metal rectangular wire, that is, in a C-shape in a plan view. The upper surface forming surface, the lower surface forming surface, the inner surface forming surface, and the outer surface forming surface are polished, and then the long rectangular metal wire is bent into a C shape in plan view.
　前述の通り、前記ピストンリングにおいては、前記外側面を滑らかに形成する必要がある。つまり、前記長尺の金属製平角線に対して研磨を行う際には、前記外側面形成面の表面粗さが他の３面の表面粗さに比して細かくなるように行い、且つ、その後に前記長尺の金属製平角線に対して平面視Ｃ字状への曲げ成形を行う際には、前記外側面形成面が径方向外方を向く外側面を形成するように行う必要がある。 As described above, in the piston ring, it is necessary to form the outer surface smoothly. That is, when polishing the long metal rectangular wire, the outer surface forming surface has a surface roughness smaller than the surface roughness of the other three surfaces, and Thereafter, when the long metal rectangular wire is bent into a C-shape in plan view, the outer surface forming surface needs to be formed so as to form an outer surface that faces radially outward. is there.
　従って、前記長尺の金属製平角線に対して研磨を行った後で平面視Ｃ字状への曲げ成形を行う前の段階において、外表面のうちどの面が前記外側面形成面であるかを製造者が識別できるようにする必要がある。この識別を可能とすることは、特に、前記金属製平角線が断面左右対称形状の場合に有効となる。 Therefore, in the stage before the long metal rectangular wire is polished and then bent into a C-shape in plan view, which of the outer surfaces is the outer surface forming surface. Need to be identified by the manufacturer. Enabling this discrimination is particularly effective when the metal rectangular wire has a symmetrical shape in the cross section.
　従来においては、前記長尺の金属製平角線に対して、研磨後で且つ曲げ成形前の段階において、例えば、前記上面形成面又は前記下面形成面等の少なくとも何れか一の外表面に、色付け又は凹み等の塑性変形によってマーキングすることが行われている。 Conventionally, for example, at least one outer surface such as the upper surface forming surface or the lower surface forming surface is colored on the long metal rectangular wire after polishing and before bending. Alternatively, marking is performed by plastic deformation such as a dent.
　しかしながら、この従来の構成では、曲げ工程後に、色落とし工程や塑性変形の修正工程等の別工程が必要となり、結果として、コスト高を招く。 However, this conventional configuration requires a separate process such as a color removal process or a plastic deformation correction process after the bending process, resulting in high costs.
特開２００３－２２０５２５号公報Japanese Patent Laid-Open No. 2003-220525
　本発明は、斯かる従来技術に鑑みなされたものであり、別工程を追加すること無く、金属製平角線を平面視Ｃ字状に曲げ成形する前の段階において、曲げ成形後に径方向外方を向く外表面を識別でき、これにより、製造コストの削減を図り得るピストンリング、並びに、前記ピストンリングを製造する為の金属製平角線の提供を目的とする。 The present invention has been made in view of such a conventional technique, and without adding a separate process, in a stage before bending a metal flat wire into a C-shape in a plan view, it is radially outward after bending. It is an object of the present invention to provide a piston ring that can identify the outer surface facing the surface, thereby reducing the manufacturing cost, and a metal rectangular wire for manufacturing the piston ring.
　本発明は、前記目的を達成するために、金属製平角線から平面視Ｃ字状のピストンリングであって、ピストンに装着された状態を基準にして、上方を向く上面、下方を向く下面、径方向内方を向く内側面及び径方向外方を向く外側面を含む４つの外表面を有するピストンリングにおいて、前記４つの外表面のうち予め特定された一の外表面には他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されているピストンリングを提供する。 In order to achieve the above object, the present invention provides a C-shaped piston ring in plan view from a rectangular metal wire, the upper surface facing upward, the lower surface facing downward based on the state of being attached to the piston, A piston ring having four outer surfaces including an inner surface facing radially inward and an outer surface facing radially outward, wherein one of the four outer surfaces is preliminarily specified as another outer surface. A piston ring is provided in which an abrasive line is formed along a direction different from the abrasive line in FIG.
　本発明に係るピストンリングによれば、４つの外表面のうち予め特定された一の外表面には他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されているので、別工程を追加すること無く、金属製平角線を平面視Ｃ字状に曲げ成形する前の段階において、曲げ成形後に径方向外方を向く外表面を識別可能とすることができ、これにより、製造コストの可及的な削減を図ることができる。 According to the piston ring according to the present invention, since one of the four outer surfaces is preliminarily specified with a polishing streak along a direction different from the polishing streak on the other outer surface, Without adding a process, it is possible to identify the outer surface facing outward in the radial direction after bending, before bending the metal rectangular wire into a C-shape in plan view. Costs can be reduced as much as possible.
　一形態においては、前記平角線は、断面形状が一対の長辺及び一対の短辺によって画される長方形状とされ、前記一対の長辺をそれぞれ含む外表面が前記上面及び前記下面を形成し、前記一対の短辺をそれぞれ含む外表面が前記内側面及び前記外側面を形成するものとされる。 In one aspect, the rectangular wire has a rectangular shape whose cross-sectional shape is defined by a pair of long sides and a pair of short sides, and an outer surface including each of the pair of long sides forms the upper surface and the lower surface. The outer surface including each of the pair of short sides forms the inner side surface and the outer side surface.
　この場合、好ましくは、前記予め特定された一の外表面は前記上面及び前記下面の一方とされ、前記上面及び前記下面の一方には第１方向に沿った研磨筋が形成され、前記上面及び前記下面の他方には前記第１方向とは異なる第２方向に沿った研磨筋が形成される。 In this case, preferably, the one outer surface specified in advance is one of the upper surface and the lower surface, and one of the upper surface and the lower surface is formed with a polishing line along a first direction, and the upper surface and On the other side of the lower surface, polishing streaks are formed along a second direction different from the first direction.
　好ましくは、前記第１方向は前記平角線の長手方向に対して所定角度傾斜された方向とされ、前記第２方向は前記長手方向に沿った方向とされる。 Preferably, the first direction is a direction inclined by a predetermined angle with respect to the longitudinal direction of the rectangular wire, and the second direction is a direction along the longitudinal direction.
　又、本発明は、前記目的を達成するために、ピストンに装着される平面視Ｃ字状のピストンリングを製造する為のピストンリング用金属製平角線であって、４つの外表面のうち予め特定された一の外表面には他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されているピストンリング用金属製平角線を提供する。 In order to achieve the above object, the present invention is a piston ring metal rectangular wire for manufacturing a C-shaped piston ring to be mounted on a piston in plan view. One specified outer surface is provided with a metal square wire for a piston ring in which polishing bars along a direction different from the polishing bars on the other outer surface are formed.
　本発明に係るピストンリング用金属製平角線によれば、４つの外表面のうち予め特定された一の外表面には他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されているので、別工程を追加すること無く、金属製平角線を平面視Ｃ字状に曲げ成形する前の段階において、曲げ成形後に径方向外方を向く外表面を識別可能とすることができ、これにより、ピストンリングの製造コストの可及的な削減を図ることができる。 According to the rectangular metal wire for a piston ring according to the present invention, one of the four outer surfaces is formed with a polishing streak along a direction different from the polishing streak on the other outer surface. Therefore, it is possible to identify the outer surface facing outward in the radial direction after bending at the stage before bending the metal rectangular wire into a C-shape in plan view without adding another process. Thereby, the manufacturing cost of the piston ring can be reduced as much as possible.
　一形態においては、断面形状が一対の長辺及び一対の短辺によって画される長方形状とされ、前記一対の長辺をそれぞれ含む外表面が、前記ピストンに装着された状態において上方を向く上面及び下方を向く下面を形成する上面形成面及び下面形成面とされ、前記一対の短辺をそれぞれ含む外表面が、前記ピストンに装着された状態において径方向内方を向く内側面及び径方向外方を向く外装面を形成する内側面形成面及び外側面形成面とされる。 In one embodiment, the cross-sectional shape is a rectangular shape defined by a pair of long sides and a pair of short sides, and an outer surface including each of the pair of long sides is an upper surface facing upward when mounted on the piston And an upper surface forming surface and a lower surface forming surface that form a lower surface facing downward, and an outer surface that includes each of the pair of short sides is an inner surface that faces radially inward and a radially outer surface when mounted on the piston. The inner side surface forming surface and the outer side surface forming surface that form the exterior surface facing in the direction are used.
　この場合、好ましくは、前記予め特定された一の外表面は前記上面形成面及び前記下面形成面の一方とされ、前記上面形成面及び前記下面形成面の一方には第１方向に沿った研磨筋が形成され、前記上面形成面及び前記下面形成面の他方には前記第１方向とは異なる第２方向に沿った研磨筋が形成される。 In this case, preferably, the one specified outer surface is one of the upper surface forming surface and the lower surface forming surface, and one of the upper surface forming surface and the lower surface forming surface is polished along a first direction. A streak is formed, and a polishing streak along a second direction different from the first direction is formed on the other of the upper surface forming surface and the lower surface forming surface.
　好ましくは、前記第１方向は前記平角線の長手方向に対して所定角度傾斜された方向とされ、前記第２方向は前記長手方向に沿った方向とされる。 Preferably, the first direction is a direction inclined by a predetermined angle with respect to the longitudinal direction of the rectangular wire, and the second direction is a direction along the longitudinal direction.
図１は、本発明の一実施の形態に係るピストンリングの平面図である。FIG. 1 is a plan view of a piston ring according to an embodiment of the present invention. 図２は、図１におけるＩＩ－ＩＩ線に沿った断面図である。FIG. 2 is a cross-sectional view taken along line II-II in FIG. 図３は、図１に示す前記ピストンリングを製造する為に用いられる金属製平角線の斜視図である。3 is a perspective view of a rectangular metal wire used for manufacturing the piston ring shown in FIG. 図４は、前記平角線の長手方向に対して９０度より小さい角度で傾斜された方向に沿った研磨筋の一例を示す画像である。FIG. 4 is an image showing an example of the polishing streak along the direction inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire. 図５は、前記平角線の長手方向に対して直交する方向に沿った研磨筋の一例を示す画像である。FIG. 5 is an image showing an example of the polishing streak along the direction orthogonal to the longitudinal direction of the flat wire. 図６は、前記平角線の長手方向に沿った研磨筋の一例を示す画像である。FIG. 6 is an image showing an example of the polishing streak along the longitudinal direction of the rectangular wire. 図７(a)～(c)は、前記ピストンリングを製造する際の研磨工程であって、第１例の研磨装置を用いた研磨工程を説明する為の模式図であり、図７(a)～(c)は、それぞれ、研磨工程の際に生じる研磨筋の方向を、前記平角線の長手方向に対して平行とさせる場合、９０度より小さい角度で傾斜させる場合、及び、直交させる場合を示している。FIGS. 7A to 7C are schematic views for explaining a polishing process using the polishing apparatus of the first example, which is a polishing process when manufacturing the piston ring. ) To (c) are the cases where the direction of the polishing streak generated in the polishing step is made parallel to the longitudinal direction of the rectangular wire, inclined at an angle smaller than 90 degrees, and orthogonal Is shown. 図８(a)及び(b)は、前記ピストンリングを製造する際の研磨工程であって、第２例の研磨装置を用いた研磨工程を説明する為の模式図であり、図８(a)及び(b)は、それぞれ、研磨工程の際に生じる研磨筋の方向を前記平角線の長手方向に対して、９０度より小さい角度で傾斜させる場合、及び、直交させる場合を示している。FIGS. 8A and 8B are schematic diagrams for explaining a polishing process using the polishing apparatus of the second example, which is a polishing process when the piston ring is manufactured. (B) and (b) show the case where the direction of the polishing streak generated in the polishing step is inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire, and the case where the direction is perpendicular thereto. 図９(a)及び(b)は、前記ピストンリングを製造する際の研磨工程であって、第２例の研磨装置を用いた研磨工程を説明する為の模式図であり、図９(a)及び(b)は、それぞれ、研磨工程の際に生じる研磨筋の方向を前記平角線の長手方向に対して、９０度より小さい角度で傾斜させる場合、及び、直交させる場合を示している。FIGS. 9A and 9B are schematic views for explaining a polishing process using the polishing apparatus of the second example, which is a polishing process when manufacturing the piston ring. (B) and (b) show the case where the direction of the polishing streak generated in the polishing step is inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire, and the case where the direction is perpendicular thereto.
　以下、本発明に係るピストンリングの一実施の形態について、添付図面を参照しつつ説明する。 Hereinafter, an embodiment of a piston ring according to the present invention will be described with reference to the accompanying drawings.
　図１及び図２に、それぞれ、本実施の形態に係るピストンリング１の平面図及び図１におけるＩＩ－ＩＩ線に沿った断面図を示す。 1 and 2 show a plan view of the piston ring 1 according to the present embodiment and a cross-sectional view taken along the line II-II in FIG. 1, respectively.
　前記ピストンリング１は、エンジンのピストンの外周面に装着されて、前記エンジンが往復動自在に収容されるシリンダの内周面に摺接する部材である。 The piston ring 1 is a member that is attached to the outer peripheral surface of a piston of an engine and that is in sliding contact with the inner peripheral surface of a cylinder in which the engine is reciprocably accommodated.
　図１及び図２に示すように、前記ピストンリング１は平面視Ｃ字状を有しており、前記ピストンに装着された状態を基準にして、上方を向く上面１１、下方を向く下面１２、径方向内方を向く内側面１３及び径方向外方を向く外側面１４を有している。 As shown in FIGS. 1 and 2, the piston ring 1 has a C-shape in plan view, and the upper surface 11 facing upward, the lower surface 12 facing downward, based on the state of being mounted on the piston, It has an inner surface 13 that faces radially inward and an outer surface 14 that faces radially outward.
　前記ピストンリング１は、断面矩形状の長尺の金属製平角線５０を用いて製造される。
　図３に、前記金属製平角線５０の斜視図を示す。
　なお、前記金属製平角線５０としては、例えば、ステンレススチール材、鋳物材、鋳鋼材、鋼材製等が用いられる。 The piston ring 1 is manufactured using a long metal rectangular wire 50 having a rectangular cross section.
FIG. 3 is a perspective view of the metal rectangular wire 50.
As the metal rectangular wire 50, for example, a stainless steel material, a casting material, a cast steel material, a steel material, or the like is used.
　図３に示すように、前記金属製平角線５０は、前記上面１１、前記下面１２、前記内側面１３及び前記外側面１４をそれぞれ形成する上面形成面５１、下面形成面５２、内側面形成面５３及び外側面形成面５４を有している。 As shown in FIG. 3, the metal rectangular wire 50 includes an upper surface forming surface 51, a lower surface forming surface 52, and an inner surface forming surface that form the upper surface 11, the lower surface 12, the inner surface 13, and the outer surface 14, respectively. 53 and an outer surface forming surface 54.
　前記ピストンリング１は、前記金属製平角線５０の４つの外表面５１～５４に対して所定の研磨を行い、その後に、前記金属製平角線５０を平面視Ｃ字状に曲げ成形することによって製造される。 The piston ring 1 performs predetermined polishing on the four outer surfaces 51 to 54 of the metal flat wire 50, and thereafter, the metal flat wire 50 is bent into a C shape in plan view. Manufactured.
　ここで、前記ピストンリング１は、前記外側面１４において前記シリンダの内周面に摺接する。
　従って、前記ピストンリング１においては、前記外側面１４の表面粗さを他の前記上面１１、前記下面１２及び前記内側面１３の表面粗さよりも細かくする必要がある。 Here, the piston ring 1 is in sliding contact with the inner peripheral surface of the cylinder on the outer surface 14.
Therefore, in the piston ring 1, it is necessary to make the surface roughness of the outer surface 14 finer than the surface roughness of the other upper surface 11, the lower surface 12 and the inner surface 13.
　前記外側面１４の表面粗さが他の３面１１～１３よりも細かくされた前記ピストンリング１を得る為には、前記金属製平角線５０に対する研磨工程の際に、前記外側面形成面５４の表面粗さを前記上面形成面５１、前記下面形成面５２及び前記内側面形成面５３の表面粗さよりも細かくし、そのように研磨された前記金属製平角線５０を、前記外側面形成面５４が径方向外方を向くように平面視Ｃ字状に曲げ成形する必要がある。 In order to obtain the piston ring 1 in which the outer surface 14 has a surface roughness finer than those of the other three surfaces 11 to 13, the outer surface forming surface 54 is subjected to a polishing process for the metal rectangular wire 50. Is made finer than the surface roughness of the upper surface forming surface 51, the lower surface forming surface 52 and the inner surface forming surface 53, and the metal rectangular wire 50 thus polished is used as the outer surface forming surface. It is necessary to bend and mold in a C shape in plan view so that 54 faces radially outward.
　そして、前記外側面形成面５４の表面粗さが他の３面５１～５３の表面粗さよりも細かくなるように研磨された前記金属製平角線を、前記外側面形成面５４が径方向外方を向くように平面視Ｃ字状に曲げ成形する為には、前記金属製平角線５０が研磨工程後で且つ曲げ工程前の長尺状態において、前記外側面形成面５４を識別可能としておく必要がある。 Then, the rectangular metal wire polished so that the surface roughness of the outer surface forming surface 54 is finer than the surface roughness of the other three surfaces 51 to 53, the outer surface forming surface 54 is radially outward. In order to bend in a C-shape in plan view so as to face the metal, it is necessary to make the outer surface forming surface 54 identifiable when the metal flat wire 50 is in a long state after the polishing process and before the bending process. There is.
　例えば、研磨後で且つ曲げ成形前の段階において、長尺の金属製平角線の何れか一の外表面に、色付け又は凹み等の塑性変形によるマーキングを行い、このマーキングによって曲げ成形後に外側面を形成する外表面を識別することも可能である。 For example, at the stage after polishing and before bending, marking is performed on the outer surface of any one of the long metal rectangular wires by plastic deformation such as coloring or dent, and the outer surface is bent by this marking after bending. It is also possible to identify the outer surface to be formed.
　しかしながら、この構成では、曲げ工程後に、色落とし工程や塑性変形部の修正工程等の別工程が必要となり、結果として、コスト高を招くことになる。 However, in this configuration, after the bending process, separate processes such as a color removal process and a plastic deformation part correction process are required, resulting in high costs.
　この点に関し、本実施の形態に係る前記ピストンリング１においては、前記４つの外表面のうち予め特定された一の外表面に他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されている。 In this regard, in the piston ring 1 according to the present embodiment, a polishing bar along a direction different from the polishing bar on the other outer surface is provided on one outer surface specified in advance among the four outer surfaces. Is formed.
　なお、他の外表面とは異なる方向に沿った研磨筋とは、例えば、前記平角線５０の長手方向に対して所定角度だけ傾斜された方向に沿った研磨筋（図４参照）、又は、前記平角線５０の長手方向に対して直交する方向に沿った研磨筋（図５参照）とすることができる。 In addition, the polishing streak along a direction different from the other outer surface is, for example, a polishing streak along a direction inclined by a predetermined angle with respect to the longitudinal direction of the flat wire 50 (see FIG. 4), or A polishing bar (see FIG. 5) along a direction orthogonal to the longitudinal direction of the flat wire 50 can be used.
　斯かる構成を備えた前記ピストンリング１によれば、曲げ成形後に前記外側面１４を形成すべき前記外側面形成面５４を、別工程を追加すること無く、前記平角線５０に対する研磨工程で且つ曲げ工程前の段階で識別することができる。 According to the piston ring 1 having such a configuration, the outer surface forming surface 54 that should form the outer surface 14 after bending is subjected to a polishing process on the rectangular wire 50 without adding another process, and It can be identified at a stage before the bending process.
　従って、前記外側面形成面５４が前記外側面１４を形成するように前記金属製平角線５０に対して曲げ成形を行うことができ、前記ピストンリング１の製造コストを可及的に削減することができる。 Therefore, the metal rectangular wire 50 can be bent so that the outer surface forming surface 54 forms the outer surface 14, and the manufacturing cost of the piston ring 1 can be reduced as much as possible. Can do.
　本実施の形態においては、図２及び図３に示すように、前記金属製平角線５０は、断面形状が一対の長辺５０ａ及び一対の短辺５０ｂによって画される長方形状とされており、前記金属製平角線５０がエッジワイズ方向に曲げ成形、即ち、前記一対の短辺５０ｂの一方が径方向内方に位置するように曲げ成形されることで、平面視Ｃ字状の前記ピストンリング１が形成されている。 In the present embodiment, as shown in FIGS. 2 and 3, the metal rectangular wire 50 has a rectangular shape whose cross-sectional shape is defined by a pair of long sides 50 a and a pair of short sides 50 b, The metal rectangular wire 50 is bent in an edgewise direction, that is, is bent so that one of the pair of short sides 50b is located radially inward, so that the piston ring having a C-shape in plan view is obtained. 1 is formed.
　この場合には、前記金属製平角線５０における４つの外表面５１～５４のうち一対の長辺５０ａをそれぞれ含む２面の外表面を前記上面形成面５１及び前記下面形成面５２として識別でき、前記一対の短辺５０ｂをそれぞれ含む２面の外表面を前記内側面形成面５３及び前記外側面形成面５４として識別できる。 In this case, two outer surfaces each including a pair of long sides 50a among the four outer surfaces 51 to 54 in the metal rectangular wire 50 can be identified as the upper surface forming surface 51 and the lower surface forming surface 52, Two outer surfaces each including the pair of short sides 50b can be identified as the inner surface forming surface 53 and the outer surface forming surface 54.
　斯かる構成において、好ましくは、前記上面形成面５１及び前記下面形成面５２の一方には第１方向に沿った研磨筋を形成し、前記上面形成面及び前記下面形成面の他方には前記第１方向とは異なる第２方向に沿った研磨筋を形成することができる。 In such a configuration, preferably, one of the upper surface forming surface 51 and the lower surface forming surface 52 is formed with polishing streaks along the first direction, and the other of the upper surface forming surface and the lower surface forming surface is the first. A polishing streak along a second direction different from the one direction can be formed.
　例えば、前記第１方向は前記長手方向に対して９０度より小さい角度で傾斜された方向（図４参照）とし、前記第２方向は前記長手方向に沿った方向（図６参照）とすることができる。 For example, the first direction is a direction inclined at an angle smaller than 90 degrees with respect to the longitudinal direction (see FIG. 4), and the second direction is a direction along the longitudinal direction (see FIG. 6). Can do.
　斯かる構成によれば、前記上面形成面５１の研磨筋の方向と前記下面形成面５２の研磨筋の方向との対比により、前記曲げ成形前の段階における前記外側面形成面５４の識別をより確実に行うことができる。 According to such a configuration, the outer surface forming surface 54 can be more clearly identified at the stage before the bending by comparing the direction of the polishing bar of the upper surface forming surface 51 and the direction of the polishing bar of the lower surface forming surface 52. It can be done reliably.
　ここで、研磨工程において生じる研磨筋の方向について説明する。
　前記研磨工程は、前記金属製平角線５０における研磨すべき外表面（被研磨面）を研磨装置７０（下記図７～図９参照）に対向させた状態で、前記平角線５０を長手方向に搬送させつつ、前記研磨装置を前記外表面に作用させることで行われ、この研磨工程の際に前記被研磨面に研磨筋が形成される。 Here, the direction of the polishing streak generated in the polishing step will be described.
In the polishing step, the rectangular wire 50 is extended in the longitudinal direction with the outer surface (surface to be polished) to be polished of the metal rectangular wire 50 facing a polishing device 70 (see FIGS. 7 to 9 below). This is performed by causing the polishing apparatus to act on the outer surface while being conveyed, and polishing streaks are formed on the surface to be polished during this polishing step.
　前記研磨装置７０は、例えば、軸線回りに回転駆動される回転軸７１と、前記回転軸７１に支持された略円柱形の研磨部材７２であって、外周面が研磨面とされた研磨部材７２とを有し得る。 The polishing apparatus 70 includes, for example, a rotating shaft 71 that is driven to rotate about an axis, and a substantially cylindrical polishing member 72 supported by the rotating shaft 71, and a polishing member 72 whose outer peripheral surface is a polishing surface. And can have
　この場合には、図７(a)に示すように、前記研磨部材７２の外周面を前記平角線５０の被研磨面に対向させた状態で前記回転軸７１が前記平角線５０の搬送方向と直交するように前記回転軸７１を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記回転軸７１を軸線回りに回転させて前記研磨部材７２を前記被研磨面に作用させることによって、前記被研磨面に前記平角線５０の長手方向に沿った研磨筋（図６参照）を形成することができる。 In this case, as shown in FIG. 7 (a), the rotating shaft 71 is in the conveying direction of the flat wire 50 with the outer peripheral surface of the polishing member 72 facing the surface to be polished of the flat wire 50. The rotating shaft 71 is arranged so as to be orthogonal to each other, and in this state, the rotating shaft 71 is rotated around the axis line while the metal rectangular wire 50 is conveyed along the longitudinal direction, so that the polishing member 72 is covered with the object to be covered. By acting on the polishing surface, polishing streaks (see FIG. 6) along the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
　これに対し、図７(b)に示すように、前記研磨部材７２の外周面を前記平角線５０の被研磨面に対向させた状態で前記回転軸７１が前記平角線５０の搬送方向に対して９０度より小さい角度で傾斜するように前記回転軸７１を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記回転軸７１を軸線回りに回転させて前記研磨部材７２を前記被研磨面に作用させることによって、前記被研磨面に、前記平角線５０の長手方向に対して９０度より小さい角度で傾斜された方向に沿った研磨筋（図４参照）を形成することができる。 On the other hand, as shown in FIG. 7 (b), the rotating shaft 71 moves in the conveying direction of the flat wire 50 with the outer peripheral surface of the polishing member 72 facing the surface to be polished of the flat wire 50. The rotating shaft 71 is disposed so as to be inclined at an angle smaller than 90 degrees, and in this state, the rotating shaft 71 is rotated around the axis while the metal rectangular wire 50 is conveyed along the longitudinal direction. By causing the polishing member 72 to act on the surface to be polished, polishing bars along the direction inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire 50 on the surface to be polished (see FIG. 4). ) Can be formed.
　さらに、図７(c)に示すように、前記研磨部材７２の外周面を前記平角線５０の被研磨面に対向させた状態で前記回転軸７１が前記平角線５０の搬送方向に平行となるように前記回転軸７１を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記回転軸７１を軸線回りに回転させて前記研磨部材７２を前記被研磨面に作用させることによって、前記被研磨面に、前記平角線５０の長手方向に対して直交した方向に沿った研磨筋（図５参照）を形成することができる。 Further, as shown in FIG. 7 (c), the rotating shaft 71 is parallel to the conveying direction of the flat wire 50 with the outer peripheral surface of the polishing member 72 facing the surface to be polished of the flat wire 50. The rotating shaft 71 is arranged as described above, and in this state, while the metal rectangular wire 50 is conveyed along the longitudinal direction, the rotating shaft 71 is rotated about the axis to move the polishing member 72 to the surface to be polished. By acting on the polishing surface, polishing streaks (see FIG. 5) along the direction orthogonal to the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
　前記研磨装置７０は前記回転軸７１及び前記研磨部材７２を有する構成に限定されるものではない。
　例えば、前記研磨装置７０は、軸線方向に沿って往復動される支持軸７５と、前記支持軸７５に支持された研磨部材７６であって、前記被研磨面に対向する面が研磨面とされた研磨部材７６とを有し得る。 The polishing apparatus 70 is not limited to the configuration having the rotating shaft 71 and the polishing member 72.
For example, the polishing apparatus 70 includes a support shaft 75 that is reciprocated along an axial direction, and a polishing member 76 that is supported by the support shaft 75, and a surface that faces the surface to be polished is a polishing surface. And a polishing member 76.
　この場合には、前記研磨部材７６の研磨面を前記平角線５０の被研磨面に対向させた状態で前記支持軸７５が前記平角線５０の搬送方向と平行となるように前記支持軸７５を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記支持軸７５を軸線方向に沿って往復動させて前記研磨部材７６を前記被研磨面に作用させることによって、前記被研磨面に前記平角線５０の長手方向に沿った研磨筋（図６参照）を形成することができる。 In this case, the support shaft 75 is arranged so that the support shaft 75 is parallel to the conveying direction of the flat wire 50 with the polishing surface of the polishing member 76 facing the surface to be polished of the flat wire 50. In this state, while the metal rectangular wire 50 is conveyed along the longitudinal direction, the support shaft 75 is reciprocated along the axial direction to cause the polishing member 76 to act on the surface to be polished. Thus, polishing streaks (see FIG. 6) along the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
　これに対し、図８(a)に示すように、前記研磨部材７６の研磨面を前記平角線５０の被研磨面に対向させた状態で前記支持軸７５が前記平角線５０の搬送方向に対して９０度より小さい角度で傾斜するように前記支持軸７５を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記支持軸７５を軸線方向に沿って往復動させて前記研磨部材７６を前記被研磨面に作用させることによって、前記被研磨面に、前記平角線５０の長手方向に対して９０度より小さい角度で傾斜された方向に沿った研磨筋（図４参照）を形成することができる。 On the other hand, as shown in FIG. 8A, the support shaft 75 moves in the conveying direction of the flat wire 50 with the polishing surface of the polishing member 76 facing the surface to be polished of the flat wire 50. The support shaft 75 is disposed so as to be inclined at an angle smaller than 90 degrees, and in this state, the support shaft 75 is reciprocated along the axial direction while the metal rectangular wire 50 is conveyed along the longitudinal direction. By causing the polishing member 76 to act on the surface to be polished by moving the polishing member 76, a polishing streak along the direction inclined at an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire 50 ( 4) can be formed.
　さらには、図８(b)に示すように、前記研磨部材７６の研磨面を前記平角線５０の被研磨面に対向させた状態で前記支持軸７５が前記平角線５０の搬送方向に対して直交するように前記支持軸７５を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記支持軸７５を軸線方向に沿って往復動させて前記研磨部材７６を前記被研磨面に作用させることによって、前記被研磨面に、前記平角線５０の長手方向に対して直交した方向に沿った研磨筋（図５参照）を形成することができる。 Further, as shown in FIG. 8 (b), the support shaft 75 moves in the conveying direction of the flat wire 50 with the polishing surface of the polishing member 76 facing the surface to be polished of the flat wire 50. The support shaft 75 is disposed so as to be orthogonal to each other, and in this state, while the metal rectangular wire 50 is conveyed along the longitudinal direction, the support shaft 75 is reciprocated along the axial direction to polish the polishing member 76. By acting on the surface to be polished, polishing streaks (see FIG. 5) along the direction orthogonal to the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
　これに代えて、前記研磨装置７０が、軸線回りに回転駆動される駆動ローラ８１と、前記駆動ローラ８１と平行に配置された従動ローラ８２と、前記駆動ローラ８１及び前記従動ローラ８２に巻き回された無端状の研磨部材８３であって、外表面が研磨面とされた研磨部材８３とを有するように構成することも可能である。 Instead, the polishing apparatus 70 is wound around a driving roller 81 that is driven to rotate about an axis, a driven roller 82 that is arranged in parallel to the driving roller 81, and the driving roller 81 and the driven roller 82. The endless polishing member 83 may be configured to have a polishing member 83 whose outer surface is a polishing surface.
　この場合には、前記研磨部材８３の研磨面を前記平角線５０の被研磨面に対向させた状態で前記駆動ローラ８１及び前記従動ローラ８２の軸線方向が前記平角線５０の搬送方向と直交するように前記駆動ローラ８１及び前記従動ローラ８２を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記駆動ローラ８１を軸線回りに回転駆動させて前記研磨部材８３を前記被研磨面に作用させることによって、前記被研磨面に前記平角線５０の長手方向に沿った研磨筋（図６参照）を形成することができる。 In this case, the axial direction of the driving roller 81 and the driven roller 82 is orthogonal to the conveying direction of the flat wire 50 with the polishing surface of the polishing member 83 facing the surface to be polished of the flat wire 50. In this state, the driving roller 81 and the driven roller 82 are arranged, and while the metal rectangular wire 50 is transported along the longitudinal direction, the driving roller 81 is driven to rotate about the axis, thereby the polishing member. By causing 83 to act on the surface to be polished, polishing streaks (see FIG. 6) along the longitudinal direction of the flat wire 50 can be formed on the surface to be polished.
　これに対し、図９(a)に示すように、前記研磨部材８３の研磨面を前記平角線５０の被研磨面に対向させた状態で前記駆動ローラ８１及び前記従動ローラ８２の軸線方向が前記平角線５０の搬送方向に対して９０度より小さい角度で傾斜するように前記駆動ローラ８１及び前記従動ローラ８２を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記駆動ローラ８１を軸線回りに回転駆動させて前記研磨部材８３を前記被研磨面に作用させることによって、前記被研磨面に、前記平角線５０の長手方向に対して９０度より小さい角度で傾斜された方向に沿った研磨筋（図４参照）を形成することができる。 On the other hand, as shown in FIG. 9 (a), the axial directions of the driving roller 81 and the driven roller 82 are set so that the polishing surface of the polishing member 83 faces the surface to be polished of the flat wire 50. The driving roller 81 and the driven roller 82 are arranged so as to be inclined at an angle smaller than 90 degrees with respect to the conveyance direction of the flat wire 50, and in this state, the metal flat wire 50 is conveyed along the longitudinal direction. However, the drive roller 81 is driven to rotate about the axis to cause the polishing member 83 to act on the surface to be polished, whereby the surface to be polished has an angle smaller than 90 degrees with respect to the longitudinal direction of the flat wire 50. A polishing streak (see FIG. 4) along the inclined direction can be formed.
　さらに、図９(b)に示すように、前記研磨部材８３の外周面を前記平角線５０の被研磨面に対向させた状態で前記駆動ローラ８１及び前記従動ローラ８２の軸線方向が前記平角線５０の搬送方向に平行となるように前記駆動ローラ８１及び前記従動ローラ８２を配置させ、この状態で、前記金属製平角線５０を長手方向に沿って搬送させつつ、前記駆動ローラ８１を軸線回りに回転駆動させて前記研磨部材８３を前記被研磨面に作用させることによって、前記被研磨面に、前記平角線５０の長手方向に対して直交した方向に沿った研磨筋（図５参照）を形成することができる。 Further, as shown in FIG. 9 (b), the axial direction of the driving roller 81 and the driven roller 82 is the rectangular wire with the outer peripheral surface of the polishing member 83 facing the surface to be polished of the flat wire 50. The driving roller 81 and the driven roller 82 are arranged so as to be parallel to the conveying direction of 50, and in this state, while driving the metal rectangular wire 50 along the longitudinal direction, the driving roller 81 is rotated around the axis. The polishing member 83 is caused to act on the surface to be polished by rotationally driving the polishing member 83, so that the polishing surface along the direction perpendicular to the longitudinal direction of the rectangular wire 50 is provided on the surface to be polished (see FIG. 5). Can be formed.
１　　　　ピストンリング
１１　　　上面
１２　　　下面
１３　　　内側面
１４　　　外側面
５０　　　金属製平角線
５０ａ　　長辺
５０ｂ　　短辺
５１　　　上面形成面
５２　　　下面形成面
５３　　　内側面形成面
５４　　　外側面形成面 DESCRIPTION OF SYMBOLS 1 Piston ring 11 Upper surface 12 Lower surface 13 Inner side surface 14 Outer side surface 50 Metal flat wire 50a Long side 50b Short side 51 Upper surface formation surface 52 Lower surface formation surface 53 Inner surface formation surface 54 Outer surface formation surface

Claims (6)

  1. 　金属製平角線から平面視Ｃ字状のピストンリングであって、ピストンに装着された状態を基準にして、上方を向く上面、下方を向く下面、径方向内方を向く内側面及び径方向外方を向く外側面を含む４つの外表面を有するピストンリングにおいて、
    　前記４つの外表面のうち予め特定された一の外表面には他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されていることを特徴とするピストンリング。     Piston ring with a C-shape in plan view from a rectangular metal wire, with the upper surface facing upward, the lower surface facing downward, the inner surface facing radially inward, and the radially outer surface, based on the state of being attached to the piston In a piston ring having four outer surfaces including an outwardly facing surface,
    One of the four outer surfaces is a piston ring characterized in that a polishing streak along a direction different from a polishing streak on the other outer surface is formed on one outer surface specified in advance.
  2. 　前記平角線は、断面形状が一対の長辺及び一対の短辺によって画される長方形状とされ、
    　前記一対の長辺をそれぞれ含む外表面が前記上面及び前記下面を形成し、前記一対の短辺をそれぞれ含む外表面が前記内側面及び前記外側面を形成しており、
    　前記予め特定された一の外表面は前記上面及び前記下面の一方とされ、
    　前記上面及び前記下面の一方には第１方向に沿った研磨筋が形成され、前記上面及び前記下面の他方には前記第１方向とは異なる第２方向に沿った研磨筋が形成されていることを特徴とする請求項１に記載のピストンリング。     The rectangular wire has a rectangular shape whose cross-sectional shape is defined by a pair of long sides and a pair of short sides,
    The outer surfaces each including the pair of long sides form the upper surface and the lower surface, and the outer surfaces each including the pair of short sides form the inner surface and the outer surface,
    The one specified outer surface is one of the upper surface and the lower surface,
    A polishing streak along a first direction is formed on one of the upper surface and the lower surface, and a polishing streak along a second direction different from the first direction is formed on the other of the upper surface and the lower surface. The piston ring according to claim 1.
  3. 　前記第１方向は前記平角線の長手方向に対して所定角度傾斜された方向とされ、前記第２方向は前記長手方向に沿った方向とされていることを特徴とする請求項２に記載のピストンリング。 The first direction is a direction inclined by a predetermined angle with respect to a longitudinal direction of the rectangular wire, and the second direction is a direction along the longitudinal direction. piston ring.
  4. 　ピストンに装着される平面視Ｃ字状のピストンリングを製造する為のピストンリング用金属製平角線であって、
    　４つの外表面のうち予め特定された一の外表面には他の外表面における研磨筋とは異なる方向に沿った研磨筋が形成されていることを特徴とするピストンリング用金属製平角線。     A metal rectangular wire for a piston ring for producing a C-shaped piston ring to be attached to the piston in plan view,
    A rectangular metal wire for a piston ring, wherein a predetermined one of the four outer surfaces is provided with a polishing bar along a direction different from a polishing bar on the other outer surface.
  5. 　断面形状が一対の長辺及び一対の短辺によって画される長方形状とされ、
    　前記一対の長辺をそれぞれ含む外表面が、前記ピストンに装着された状態において上方を向く上面及び下方を向く下面を形成する上面形成面及び下面形成面とされ、前記一対の短辺をそれぞれ含む外表面が、前記ピストンに装着された状態において径方向内方を向く内側面及び径方向外方を向く外装面を形成する内側面形成面及び外側面形成面とされ、
    　前記予め特定された一の外表面は前記上面形成面及び前記下面形成面の一方とされ、
    　前記上面形成面及び前記下面形成面の一方には第１方向に沿った研磨筋が形成され、前記上面形成面及び前記下面形成面の他方には前記第１方向とは異なる第２方向に沿った研磨筋が形成されていることを特徴とする請求項１に記載のピストンリング用金属製平角線。     The cross-sectional shape is a rectangular shape defined by a pair of long sides and a pair of short sides,
    The outer surfaces each including the pair of long sides are an upper surface forming surface and a lower surface forming surface that form an upper surface facing upward and a lower surface facing downward when mounted on the piston, and each includes the pair of short sides. The outer surface is an inner surface forming surface and an outer surface forming surface forming an inner surface facing radially inward and an exterior surface facing radially outward in a state where the outer surface is mounted on the piston,
    The one outer surface specified in advance is one of the upper surface forming surface and the lower surface forming surface,
    One of the upper surface forming surface and the lower surface forming surface is formed with a polishing line along a first direction, and the other of the upper surface forming surface and the lower surface forming surface is along a second direction different from the first direction. 2. A rectangular metal wire for a piston ring according to claim 1, wherein a polishing bar is formed.
  6. 　前記第１方向は前記平角線の長手方向に対して所定角度傾斜された方向とされ、前記第２方向は前記長手方向に沿った方向とされていることを特徴とする請求項５に記載のピストンリング用金属製平角線。 6. The first direction according to claim 5, wherein the first direction is a direction inclined by a predetermined angle with respect to a longitudinal direction of the rectangular wire, and the second direction is a direction along the longitudinal direction. Metal rectangular wire for piston rings.
PCT/JP2014/083842 2014-03-20 2014-12-22 Piston ring and metal rectangular wire for piston ring WO2015141086A1 (en)

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JP4680380B2 (en) * 2000-12-26 2011-05-11 株式会社リケン Piston ring and manufacturing method thereof
JP2003010937A (en) * 2001-07-02 2003-01-15 Nippon Piston Ring Co Ltd Manufacturing apparatus for piston ring
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JPS56165152U (en) * 1980-05-13 1981-12-07
JPS58146848U (en) * 1982-03-29 1983-10-03 帝国ピストンリング株式会社 Barrel face steel piston ring
JPS6455364U (en) * 1987-10-02 1989-04-05
JP2011117502A (en) * 2009-12-02 2011-06-16 Hino Motors Ltd Piston ring
JP2011241982A (en) * 2010-05-14 2011-12-01 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland Method for driving of piston internal combustion engine, and piston for the piston internal combustion engine

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