WO2020022308A1 - Fil déformé pour anneau de pression - Google Patents

Fil déformé pour anneau de pression Download PDF

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Publication number
WO2020022308A1
WO2020022308A1 PCT/JP2019/028766 JP2019028766W WO2020022308A1 WO 2020022308 A1 WO2020022308 A1 WO 2020022308A1 JP 2019028766 W JP2019028766 W JP 2019028766W WO 2020022308 A1 WO2020022308 A1 WO 2020022308A1
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WO
WIPO (PCT)
Prior art keywords
deformed wire
pressure ring
wire
deformed
longitudinal direction
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PCT/JP2019/028766
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English (en)
Japanese (ja)
Inventor
行隆 水谷
Original Assignee
日立金属株式会社
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Filing date
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Application filed by 日立金属株式会社 filed Critical 日立金属株式会社
Priority to JP2020532401A priority Critical patent/JP7347423B2/ja
Publication of WO2020022308A1 publication Critical patent/WO2020022308A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F5/00—Piston rings, e.g. associated with piston crown
    • 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
    • F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging

Definitions

  • the present invention relates to a deformed wire used for a pressure ring incorporated in a piston of an engine of an automobile or the like.
  • a piston ring incorporated into a piston which is one of the components of the engine.
  • a top ring and a second ring are arranged in order from the top surface side of the piston as a pressure ring, and an oil ring is arranged below the top ring and the second ring.
  • the pressure ring has a cross section that differs vertically and horizontally, that is, has an asymmetric cross section that is asymmetrical from the center.
  • the oil ring has a pseudo I-shaped cross section when the cross section is a two-piece type, and is called a side rail when the oil ring is a three-piece type. Has the same shape, that is, the same cross section of a symmetric shape from the center.
  • the pressure ring has an asymmetric cross-sectional shape from the center, and a C-shaped or R-shaped chamfer is formed at each corner, so that the pressure ring has a complicated irregular cross section.
  • the pressure ring is manufactured from a deformed wire for a pressure ring having a deformed cross section similar to the cross sectional shape thereof (hereinafter, also simply referred to as a “deformed wire”).
  • the above-described deformed wire rod is a molding apparatus in which a plurality of molding units each having a four-direction roll turks head are arranged in tandem, and a leveler is disposed at the forefront and last stages of the molding units. It has been proposed to form a coil and wind it into a coil. This proposal is an excellent technique in that the bending generated in the deformed wire can be reduced.
  • the above-mentioned pressure ring is required to have a sealing property to prevent unburned mixed gas and exhaust gas from flowing out of the gap between the piston and the cylinder into the crankcase, and to prevent engine oil from flowing into the cylinder.
  • a Cr-based hard coating is formed on the pressure ring after the surface of the deformed wire is ground for the purpose of improving its sliding characteristics.
  • the above-mentioned hard coating is formed on the surface of the substrate made of the deformed wire by, for example, an ion plating method using a target.
  • the arc ion plating method is a method in which a target as a raw material of a hard film is instantaneously dissolved and ionized by arc discharge in a reduced-pressure reaction gas atmosphere, and is deposited on the surface of a negatively applied substrate to form a hard film. This is a method of forming and is also applied to formation of a hard coating for a pressure ring. In this case, it is necessary to improve the sealing performance with the hard coating formed.
  • An object of the present invention is to provide a deformed wire which is useful for improving the sealing property of a pressure ring.
  • the present inventor has found that a deformed wire used for a pressure ring can be provided with a new specific surface shape to provide a deformed wire capable of improving the sealing property of the pressure ring, and has reached the present invention.
  • the deformed wire for a pressure ring of the present invention has a width variation of 5 ⁇ m or less and a thickness variation of 5 ⁇ m or less evaluated in a range of 1 m in the longitudinal direction.
  • the deformed wire for a pressure ring of the present invention preferably has a lateral bending amount in the width direction of 10 mm or less, evaluated in a range of 1 m in the longitudinal direction. Further, the deformed wire for a pressure ring of the present invention more preferably has a lateral bending amount in the width direction of 1.0 ⁇ m or less, evaluated in a range of 20 mm in the longitudinal direction.
  • the deformed wire for a pressure ring of the present invention preferably has a glossiness of 150 or more on each surface in the longitudinal direction.
  • the deformed wire for a pressure ring of the present invention is preferably made of martensitic stainless steel.
  • the present invention can provide a deformed wire rod that can contribute to improvement in sealing performance, and is a useful technique for manufacturing a pressure ring.
  • the result of measuring the variation of the width of the deformed wire The result of measuring the variation of the thickness of the deformed wire.
  • the schematic diagram which shows the measuring method of the lateral bending of a deformed wire The schematic diagram which shows an example of the apparatus which manufactures the deformed wire of this invention.
  • the piston ring has a top ring and a second ring arranged in order from the top surface side of the piston as a pressure ring, and an oil ring is arranged below the top ring and the second ring.
  • the pressure ring is most required to have a sealing property that prevents unburned mixed gas and exhaust gas from flowing out of the gap between the piston and the cylinder into the crankcase and engine oil from flowing into the cylinder. It is a member to be performed.
  • the pressure ring has, for example, different lengths of each side as shown in FIG. 6 showing a schematic diagram of a cross section, and a chamfer of a C surface or an R surface is formed at each corner, and from the center. It has a complex irregular cross section that is asymmetric.
  • the deformed wire for the pressure ring is usually wound into a coil.
  • This deformed wire is unwound from a coil when forming a pressure ring, and the width of the deformed wire becomes a portion corresponding to the thickness (a1) of the pressure ring specified in JIS B 8032-4. Curling is performed so that the thickness of the wire becomes a portion corresponding to the width (h1) of the pressure ring specified in JIS B 8032-4.
  • the deformed wire of the present invention has a transverse section when unwound from a coil, that is, a schematic cross-sectional view in the axial direction of the piston in a state where the pressure ring is incorporated in the piston.
  • the deformed wire according to the embodiment of the present invention is suitable for a pressure ring having a width (w) dimension of 1 to 5 mm and a thickness (t) dimension of 0.5 to 3 mm.
  • the deformed wire of the present invention has a predetermined shape in the width direction and the thickness direction.
  • the variation in the width dimension is 5 ⁇ m or less
  • the variation in the thickness dimension is 5 ⁇ m or less, evaluated in a range of 1 m in the longitudinal direction.
  • the variation in the width dimension and the thickness dimension refers to the difference between the maximum value and the minimum value obtained in the width dimension and the thickness dimension measured in a range of 1 m in the longitudinal direction of the deformed wire.
  • the w and t portions shown in FIG. 6 can be calculated from values measured at intervals of 20 mm in the longitudinal direction.
  • the deformed wire for the pressure ring is usually wound into a coil. For this reason, it is preferable that the shape evaluation in the width direction and the thickness direction be performed at the front and rear ends of the coil within a range of 1 m in the longitudinal direction.
  • the pressure ring In order to improve the sealing performance of the pressure ring, it is necessary to make the surface sliding on the inner wall surface of the cylinder, that is, the outer peripheral surface of the pressure ring conform to the shape of the inner wall surface of the cylinder. Further, in order to improve the sealing performance of the pressure ring, it is necessary to make the upper and lower surfaces and the inner peripheral surface of the pressure ring along the inner wall surface of the ring groove of the piston.
  • the pressure ring may be used with, for example, a Cr-based hard film formed on the surface thereof. The hard coating is formed by depositing the raw material of the hard coating along the surface shape of the deformed wire serving as the base material by an arc ion plating method or the like.
  • the deformed wire of the present invention has a specific surface shape in which the variation in the width dimension is 5 ⁇ m or less and the variation in the thickness dimension is 5 ⁇ m or less, evaluated in a range of 1 m in the longitudinal direction.
  • the deformed wire of the present invention can suppress irregularities generated in the hard film formed on the surface that becomes the outer peripheral surface of the pressure ring, and can form the surface of the hard film along the inner wall surface of the cylinder, This can contribute to a reduction in polishing allowance and a reduction in polishing time in lapping.
  • the irregularly shaped wire rod of the present invention also suppresses the occurrence of irregularities due to dimensional fluctuations of the surface serving as the inner peripheral surface of the pressure ring and the upper and lower surfaces constituting the thickness, and the surface along the inner wall surface of the cylinder. Shape.
  • the deformed wire of the present invention can contribute to the production of a pressure ring having excellent sealing properties in the cylinder axial direction and the circumferential direction regardless of the presence or absence of a hard coating.
  • the variation in the width dimension and the thickness dimension is preferably suppressed to 5 ⁇ m or less over the entire length.
  • the deformed wire of the present invention can be partially formed in the width direction and the thickness direction by grinding in order to remove irregularities and the like caused by dimensional fluctuations over the entire circumference of the pressure ring in the forming process of the pressure ring. It is possible to suppress the occurrence of underfill due to a large decrease in thickness. Thereby, the deformed wire of the present invention can secure a uniform spring constant over the entire length thereof, and can contribute to improvement in bending workability and roundness in a pressure ring forming process.
  • the variation in the width dimension is 0 ⁇ m and the variation in the thickness dimension is 0 ⁇ m, which is evaluated in a range of 1 m in the longitudinal direction. Therefore, in practice, it is preferable that the variation in the width dimension is 3 ⁇ m or less and the variation in the thickness dimension is 3 ⁇ m or less. More preferably, the variation in the width dimension is 2 ⁇ m or less, and the variation in the thickness dimension is 2 ⁇ m or less.
  • the amount of lateral bending is 10 mm or less.
  • the deformed wire of the present invention can contribute to the improvement of the formability of the pressure ring, and the surface serving as the outer peripheral surface follows the shape of the inner wall surface of the cylinder, thereby improving the sealing performance in the cylinder circumferential direction.
  • the lateral bending amount in the width direction per 1 m in the longitudinal direction is particularly preferably 0 mm, but from the viewpoint of productivity, it is more preferably 7 mm or less in reality.
  • the deformed wire rod according to the embodiment of the present invention has a continuously generated transverse bending amount in the width direction of 1.0 ⁇ m or less, which is evaluated in a range of 20 mm in a longitudinal direction called waviness.
  • the deformed wire of the present invention has a cross section that conforms to the shape of the inner wall surface of the ring groove of the piston, and the abutment portion can be aligned with high accuracy, thereby improving the sealing performance in the cylinder axial direction and the circumferential direction.
  • the amount of lateral bending in the width direction per 20 mm is particularly preferably 0 ⁇ m, but from the viewpoint of productivity, it is practically more preferably less than 1.0 ⁇ m.
  • the glossiness of each surface in the longitudinal direction is preferably 150 or more, and 170 or more. More preferred.
  • an oxide scale may be formed depending on a manufacturing process according to the component composition. This oxide scale impairs the sealing properties of the pressure ring and the adhesion of the hard coating. For this reason, the deformed wire on which the oxide scale is formed requires a polishing step of removing the oxide scale in the pressure ring forming step.
  • the glossiness of the surface on which the hard coating of the pressure ring is formed is 150 or more, whereby the polishing step for removing the oxide scale can be omitted.
  • the glossiness of the surface on which the hard coating is formed is 170 or more.
  • the glossiness in the present invention refers to a value measured in Gs (60 °) in the method for measuring specular glossiness specified in JIS Z8741.
  • the glossiness can be measured using, for example, a gloss meter (IG-331) manufactured by Horiba, Ltd.
  • the deformed wire for the pressure ring is accompanied by heat treatment such as quenching and tempering depending on the manufacturing process according to the component composition.
  • the deformed wire according to the embodiment of the present invention has a surface roughness (Rz) of 0.6 ⁇ m or less evaluated in a range of 1 m in a longitudinal direction of a surface to be an outer peripheral surface of the pressure ring after quenching and tempering, and a thickness of the deformed wire. It is preferable that the surface roughness (Rz) evaluated in the entire thickness range in the height direction is 0.6 ⁇ m or less.
  • the deformed wire of the present invention is capable of suppressing irregularities generated in the hard film formed on the surface that becomes the outer peripheral surface of the pressure ring, and the surface of the hard film can be shaped along the inner wall surface of the cylinder, This can contribute to improving the sealing performance of the pressure ring.
  • the surface roughness referred to in the present invention refers to the maximum height roughness (Rz) specified in JIS B0601.
  • the surface roughness can be measured using, for example, a contour shape measuring instrument (SV-C4100) manufactured by Mitutoyo Corporation.
  • the deformed wire according to the embodiment of the present invention is made of martensitic stainless steel from the viewpoint of improving heat resistance and abrasion resistance due to sliding between the surface serving as the outer peripheral surface of the pressure ring and the inner wall surface of the cylinder.
  • martensitic stainless steel for example, a steel grade equivalent to SUS420J2 containing 13% by mass of Cr or SUS440B containing 17% by mass of Cr, which is defined by JIS G # 4303, can be applied.
  • the deformed wire rod of the present invention is more preferably made of martensitic stainless steel containing 17% by mass of Cr from the viewpoint of improving glossiness in addition to improving hardness and corrosion resistance.
  • the deformed wire of the present invention is obtained by rolling a steel wire using a deformed wire forming apparatus disclosed in FIG. 1 of Patent Document 1.
  • the cross-section of the deformed wire to be obtained has a complicated shape
  • the rolled material as rolled by the above-described forming apparatus has a limit in reducing the variation in the width dimension and the thickness dimension, and the width is limited. It is difficult to make the dimensional variation less than 5 ⁇ m and the thickness variation less than 5 ⁇ m.
  • a rolled material rolled by the above-mentioned forming apparatus is subjected to a plurality of skin pass finishes or the like so that the variation in width is 5 ⁇ m or less and the variation in thickness is 5 ⁇ m or less. It is preferable to perform a surface treatment.
  • the deformed wire of the present invention is formed by drawing the steel wire 2 unwound from the unwinder 1 with the die 5 by the tension of the drawing drum 7 using the apparatus for manufacturing the deformed wire shown in FIG. It is preferable to obtain the wire 6 by winding it up with a winding machine 8 via a drawing drum 7.
  • the drawn wire obtained by this die drawing has a width variation of 5 ⁇ m or less and a thickness variation of 5 ⁇ m or less without adding a surface treatment step such as skin pass finishing required for a rolled material.
  • the deformed wire of the present invention can be obtained.
  • the steel wire used for drawing it is preferable to use a wire having a similar shape to the cross-sectional shape of the deformed wire to be obtained as the steel wire used for drawing, and it is more preferable to set the area reduction rate at this time in a range of 2% to 10%. preferable. Further, it is preferable that the steel wire is drawn in one pass using a die having an approach angle in the range of 0.5 ° to 10.0 ° in full angle. In addition, since the deformed wire of the present invention made of a drawn wire can reduce the variation in the amount of springback in the longitudinal direction as compared with a conventional rolled material, it can contribute to an improvement in bending workability in a pressure ring forming process. .
  • the deformed wire made of the drawn wire according to the present invention has, as a secondary effect due to a reduction in the amount of springback, a grinding process for adjusting a surface shape in a forming process of a pressure ring. It can also contribute to shortening and improvement in roundness.
  • the lubricating film forming apparatus 4 is installed before the die 5 and a lubricating film is formed on the surface of the steel wire 2 before the die 5 is pulled out. .
  • a system in which the steel wire 2 is immersed in a lubricating oil tank 41 filled with lubricating oil as shown in FIG. a method of forming a lubricating film by passing through the steel strand 2 while sandwiching the nonwoven fabric 42 impregnated with lubricating oil. Is more preferred.
  • the nonwoven fabric 42 can be made of vegetable fiber, thermoplastic resin, or synthetic resin.
  • the nonwoven fabric 42 passes through the steel wire 2 while sandwiching the left and right and up and down directions of the cleaned steel wire 2 in tandem. More preferably, they are arranged so as to be lined. It is preferable to supply the lubricating oil to the nonwoven fabric 42 by using a suction method in which the end of the nonwoven fabric 42 is immersed in lubricating oil stored in a tank (not shown) and utilizing the capillary phenomenon.
  • the tension in the pulling direction of the wire of the steel wire 2 be kept constant by installing a tension control device 3 such as an accumulator dancer at the subsequent stage of the unwinder 1, for example.
  • a tension control device 3 such as an accumulator dancer at the subsequent stage of the unwinder 1, for example.
  • the tension control device 3 can suppress the fluctuation of the tension on the entry side of the die 5 by the drawing drum 7 and can stabilize the drawing of the steel wire 2.
  • the tension control device 3 can suppress the vibration generated in the steel wire 2 in the vertical and horizontal directions with respect to the pulling direction due to the parametric excitation caused by the tension fluctuation in the pulling direction, In addition to forming a uniform lubricating film, it plays a significant role in introducing the steel wire 2 into the die 5 and improving the drawability. This is preferable in that it is possible to obtain the deformed wire of the present invention in which the variation in the width dimension and the thickness dimension and the amount of lateral bending in the width direction are suppressed.
  • the deformed wire after the steel wire 2 on which the lubricating film is formed is drawn out by the die 5 is corrected through the upper and lower levelers 9 and the left and right levelers 10.
  • the lateral bending amount in the width direction evaluated in the range of 1 m in the longitudinal direction is suppressed to 10 mm or less, and the lateral bending amount in the width direction evaluated in the range of 20 mm is also 1.0 ⁇ m. It is suppressed as follows.
  • the drawn wire when the drawn wire is formed into a pressure ring, it forms a surface shape that is useful for improving the adhesion and sealing properties of the hard coating, that is, the glossiness of each surface in the longitudinal direction of the deformed wire is 150 or more. It is more preferable also from the viewpoint of doing.
  • the steel wire 2 is unwound from the unwinding machine 1 using the apparatus for manufacturing a deformed wire rod shown in FIG. 4, and is wound around the tension control device 3 composed of an accumulator dancer roll a plurality of times.
  • the steel wire 2 was immersed to form a uniform lubricating film on the surface of the steel wire 2.
  • the steel wire 2 is drawn out by the die 5 by the tension of the drawing drum 7 arranged at the subsequent stage of the die 5, formed into a deformed wire rod shown in FIG. 6, and then corrected by the upper and lower levelers 9 and the left and right levelers 10.
  • the wire was continuously wound by the winder 8 to obtain a deformed wire rod which was Example 1 of the present invention.
  • the steel wire 2 is unwound from the unwinding machine 1 using an apparatus for manufacturing a deformed wire rod shown in FIG. 5, and is wound around the tension control device 3 composed of an accumulator dancer roll a plurality of times.
  • a uniform lubricating film was formed on the surface of the steel wire 2 by using a nonwoven fabric 42 made of a thermoplastic resin impregnated with the steel wire.
  • the steel wire 2 is drawn out by the die 5 by the tension of the drawing drum 7 arranged at the subsequent stage of the die 5, formed into a deformed wire rod shown in FIG. 6, and then corrected by the upper and lower levelers 9 and the left and right levelers 10.
  • the wire was continuously wound up by the winder 8 to obtain a deformed wire rod of Example 2 of the present invention.
  • the supply of the lubricating oil to the nonwoven fabric 42 was performed by dipping the end of the nonwoven fabric 42 in the lubricating oil stored in a tank (not shown) and using a suction method utilizing the capillary phenomenon.
  • the lubricating oil used the lubricating oil which consists of a commercially available mineral oil.
  • steel wire a wire material equivalent to SUS440B containing 17 mass% of Cr and having a similar shape to the cross-sectional shape shown in FIG. 6 was prepared, and the area reduction rate from the steel wire was set to 5%.
  • die a die made of sintered diamond and having an approach angle of 4.0 ° in full angle was used. The processing speed was set at 5 m / min for each drawing. Further, in order to obtain a deformed wire rod shown in FIG. 6, a deformed wire rod as a conventional example was manufactured using a deformed wire rod forming apparatus disclosed in FIG.
  • FIG. 1 shows the results of the width dimension
  • FIG. 2 shows the results of the thickness dimension, measured at intervals of 20 mm in a range of 1 m in the longitudinal direction of each deformed wire.
  • the conventional deformed wire rod had a width dimension variation of 8 ⁇ m and a thickness dimension variation of 7 ⁇ m within a range of 1 m in the longitudinal direction, and each variation value exceeded 5 ⁇ m.
  • the fluctuation of the width dimension was 2 ⁇ m and the fluctuation of the thickness dimension was 2 ⁇ m within 1 m in the longitudinal direction.
  • Each value was 5 ⁇ m or less, and it was confirmed that the deformed wire was useful for improving the sealing property of the pressure ring.
  • the amount of lateral bending generated in the width direction per 1 m in the longitudinal direction and around 20 mm when the obtained deformed wire 6 was unwound was measured with reference to the straight ruler 11. did.
  • Table 1 shows the results.
  • the deformed wire as a conventional example had a lateral bend in the width direction per 1 m in the longitudinal direction of 14 mm, and a lateral bend in the width direction per 20 mm of 1.9 ⁇ m.
  • the deformed wire rod according to Inventive Example 1 had a lateral bend in the width direction of 1 mm in the longitudinal direction of 6 mm, and a lateral bend in the width direction of 20 mm per 1.0 mm.
  • the deformed wire rod of the present invention example 2 has a lateral bend in the width direction of 1 mm in the longitudinal direction of 5 mm, a lateral bend in the width direction of 20 mm per 0.9 mm, and improves the sealing property of the pressure ring. It was confirmed that it was a useful deformed wire.
  • the specular gloss Gs (60 °) defined by JIS Z 8741 was measured for each surface of the deformed wire in the longitudinal direction.
  • Table 1 shows the results.
  • the glossiness of the deformed wire as a conventional example was 140 or less on any surface in the longitudinal direction.
  • the deformed wire rods of Inventive Example 1 and Inventive Example 2 had a glossiness of 150 or more on any surface in the longitudinal direction, and were confirmed to be useful for forming a hard coating.
  • Rz of the deformed wire as a conventional example was 0.7 ⁇ m in the longitudinal direction and 0.8 ⁇ m in the width direction.
  • Rz of the deformed wires of Examples 1 and 2 of the present invention is 0.5 ⁇ m in the longitudinal direction and 0.5 ⁇ m in the width direction. It was confirmed that there was.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Metal Extraction Processes (AREA)

Abstract

L'invention concerne un fil déformé qui est utile pour améliorer les propriétés d'étanchéité d'un anneau de pression. Le fil déformé est destiné à un anneau de pression et présente une variation dans les dimensions de la largeur ne dépassant pas 5 µm et une variation dans les dimensions de l'épaisseur ne dépassant pas 5 µm, telles qu'évaluées dans une plage de 1 m dans la direction longitudinale. Il est préférable que la quantité de courbure horizontale dans la direction de la largeur, telle qu'évaluée dans une plage de 1 m dans la direction longitudinale, ne dépasse pas 10 mm. Il est préférable que la quantité de courbure horizontale dans la direction de la largeur, telle qu'évaluée dans une plage de 20 mm dans la direction longitudinale, ne dépasse pas 10 µm. Il est préférable que la brillance de chaque surface dans la direction longitudinale soit d'au moins 150. Il est davantage préférable que le fil déformé soit formé d'acier inoxydable à base de martensite.
PCT/JP2019/028766 2018-07-27 2019-07-23 Fil déformé pour anneau de pression WO2020022308A1 (fr)

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JP2018-141108 2018-07-27
JP2018141108 2018-07-27

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WO2020022308A1 true WO2020022308A1 (fr) 2020-01-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7467783B1 (ja) 2024-02-05 2024-04-15 トクセン工業株式会社 圧力リング用線
JP7508717B1 (ja) 2024-02-05 2024-07-01 トクセン工業株式会社 圧力リング用線

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478375A (ja) * 1990-07-20 1992-03-12 Riken Corp ピストン用オイルリング
JPH04333545A (ja) * 1991-05-08 1992-11-20 Hitachi Metals Ltd 内燃機関の２ピース型オイルリング用異形鋼線材およびその製造方法
JPH08135498A (ja) * 1994-11-10 1996-05-28 Hitachi Metals Ltd 内燃機関のオイルリングのサイドレール用平鋼線材およびその製造方法
JP2003119551A (ja) * 2002-09-20 2003-04-23 Kawasaki Steel Corp 極めて良好な表面光沢度を有するステンレス鋼冷間圧延鋼帯
JP2016011675A (ja) * 2014-06-27 2016-01-21 株式会社リケン ピストンリング

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59101203A (ja) * 1982-11-29 1984-06-11 Kanai Hiroyuki 異形線の加工方法
JP5327610B2 (ja) * 2009-03-05 2013-10-30 日立金属株式会社 ピストンリング用異形線材の成形装置
JP5376668B2 (ja) * 2010-02-26 2013-12-25 日本ピストンリング株式会社 ピストンリング

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478375A (ja) * 1990-07-20 1992-03-12 Riken Corp ピストン用オイルリング
JPH04333545A (ja) * 1991-05-08 1992-11-20 Hitachi Metals Ltd 内燃機関の２ピース型オイルリング用異形鋼線材およびその製造方法
JPH08135498A (ja) * 1994-11-10 1996-05-28 Hitachi Metals Ltd 内燃機関のオイルリングのサイドレール用平鋼線材およびその製造方法
JP2003119551A (ja) * 2002-09-20 2003-04-23 Kawasaki Steel Corp 極めて良好な表面光沢度を有するステンレス鋼冷間圧延鋼帯
JP2016011675A (ja) * 2014-06-27 2016-01-21 株式会社リケン ピストンリング

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7467783B1 (ja) 2024-02-05 2024-04-15 トクセン工業株式会社 圧力リング用線
JP7508717B1 (ja) 2024-02-05 2024-07-01 トクセン工業株式会社 圧力リング用線

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