JP2001153227A - Light-weight cylindrical member excellent in durability and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive lightweight cylindrical member excellent in durability and a method of manufacturing a lightweight cylindrical member excellent in durability capable of easily mass-producing such a lightweight cylindrical member. . SOLUTION: A wear-resistant metal wire 2 is exposed in a wire fitting groove 3 provided on the inner wall of a cylindrical body 1 made of a lightweight material as a smooth surface part of which is flush with the inner surface of the cylindrical body 1. A durable lightweight cylindrical member that is fitted and integrated so as to be integrated, and a groove for fitting a wire rod is provided on the inner surface of the cylindrical body, and a part of the wear-resistant metal wire is partially inserted into the inner surface of the cylindrical body. The portion protruding from the inner surface of the cylindrical body is pressurized to form a smooth surface on the same plane as the inner surface of the cylindrical body, and the wear-resistant metal wire is formed on the inner wall of the cylindrical body. A method for manufacturing a lightweight cylindrical member with excellent durability that can be fitted into and integrated with a cylindrical member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight cylindrical member having excellent durability and improved abrasion resistance and seizure resistance of a sliding inner surface of a cylinder, an actuator and other lightweight cylindrical members, and a method of manufacturing the same. Things.

[0002]

2. Description of the Related Art In order to reduce the weight of a cylindrical member such as a cylinder of an electric motor or an actuator of a hydraulic device, the cylindrical member must be made of a lightweight non-ferrous metal material such as an aluminum alloy or a lightweight material such as a synthetic resin. The inner surface of the slide is subjected to plating such as hard chrome plating or electrochemical treatment by anodic oxidation to improve the wear resistance and seizure resistance. It is known that a film is formed or subjected to a sputtering process.

[0003] However, the plating treatment is not environmentally preferable due to the problem of waste liquid treatment, and the treatment cost is high.
On the other hand, electrochemical treatment by anodic oxidation method has chemical resistance, particularly, it is easily eroded by alkali, and furthermore, sufficient durability is not obtained due to a limited film thickness, and furthermore, since a protective film is formed. Takes a considerable amount of time, and the cost of each method is high, such as the use of large-scale equipment for forming a protective film by electrochemical treatment or sputtering by the anodic oxidation method. Was.

[0004]

An object of the present invention is to solve the above-mentioned problems and to improve the wear resistance and seizure resistance of the sliding inner surface at a low cost and excellent durability. It is an object of the present invention to provide a lightweight cylindrical member and a method of manufacturing such a lightweight cylindrical member with excellent durability which can be easily mass-produced.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a wear-resistant metal wire in a wire fitting groove provided on an inner wall of a cylindrical body made of a lightweight material. Is fitted and integrated so that it is exposed as a smooth surface on the same plane as the inner surface of the cylindrical body, and the inner surface is formed as a sliding surface with excellent wear resistance. A cylindrical member, a manufacturing method for easily mass-producing the lightweight cylindrical member, that is, a groove forming step of providing a groove for fitting a wire rod into an inner surface of a cylindrical body made of a lightweight material, and abrasion resistance in the groove. Inserting a conductive metal wire so that a part thereof protrudes from the inner surface of the cylindrical body, and pressurizing a portion of the fitted abrasion-resistant metal wire protruding from the inner surface of the cylindrical body to plastically deform the wire. By making the above-mentioned protruding portion the inner surface of the cylindrical body A method of manufacturing a lightweight cylindrical member having excellent durability, comprising at least a finishing step of forming the wear-resistant metal wire rod on the inner wall of the cylindrical body while forming the smooth surface on one surface. Consisting of

The abrasion-resistant metal wire to be integrated with the wire fitting groove provided on the inner wall of the tubular body made of a lightweight material having excellent durability according to the present invention is tough and processed. Particularly preferred is a hardened steel wire which has good properties and can be obtained at a low cost. The hardened steel wire is an invention according to claim 2, and is further provided with a groove for fitting a wire provided on the inner wall of the cylindrical body and fitted integrally with the groove. As wear-resistant metal wires,
Assuming that a spiral groove is provided from one end opening to the other end opening of the cylindrical body, a spiral abrasion-resistant metal wire is formed on the cylindrical body as a smooth surface with a part thereof being flush with the inner surface of the cylindrical body. Even if it is fitted and integrated so that it is exposed in the shape of a cylinder, it is assumed that a number of linear or curved grooves are provided from the one end opening to the other end opening of the cylindrical body, and this is an elongated wear-resistant metal. The wire may be fitted and integrated so that a part of the wire is exposed as a smooth surface on the same plane as the inner surface of the tubular body, and these are defined as claims 3 and 4.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to an actuator of a hydraulic device whose main part is shown in the drawings. 1 is a cylindrical body made of a lightweight non-ferrous metal material such as aluminum or a tough synthetic resin material constituting the cylinder body, and 2 is fitted and integrated into a groove 3 for fitting a wire formed on the inner wall of the cylindrical body 1. It is a wear-resistant metal wire. What is illustrated as the wear-resistant metal wire 2 is a hardened steel wire having a cross-sectional shape corresponding to the cross-sectional shape of the groove 3 for fitting the wire. In the first embodiment shown in FIG. 1, the wear-resistant metal wire 2 is almost entirely embedded in the inner wall of the tubular body 1 while being wound in a spiral shape. Inner surface 1a of tubular body 1
And is exposed at a required interval as the same surface as the inner surface 1a of the tubular body 1, so that the sliding surface of the tubular body 1 is laterally aligned with the inner surface 1a of the tubular body 1 itself. It is formed like a zebra pattern by the smooth surface in the direction. The wear-resistant metal wire 2 according to the second embodiment shown in FIG. 2 is elongated in a straight line or a gently curved shape, and a large number of the wires are arranged on the inner wall of the cylindrical body 1 at a required interval in the vertical direction. The sliding surface of the tubular body 1 is formed in a zebra pattern by the smooth surface of the wear-resistant metal wire 2 embedded in the longitudinal direction and the inner surface 1a of the tubular body 1 itself. The wire fitting groove 3 has an opening width narrower than that of the middle portion so as to secure a firm fitting state, and the wear-resistant metal wire 2 has a portion except for a smooth surface of the cylindrical body 1. It will be embedded in the inner wall.

In such a structure, the cylindrical body 1 is made of a lightweight non-ferrous metal material such as aluminum or a lightweight material such as a synthetic resin, and the ratio of the wear-resistant metal wire 2 to the entirety. Is extremely small, so that it is lightweight as a whole, and the inner surface of the tubular body 1 is made of a lightweight material such as a non-ferrous metal material or a synthetic resin having relatively soft and poor wear resistance. The sliding surface of the tubular body 1 is provided with a wire fitting groove 3 provided on a part of the inner wall of the tubular body 1.
The abrasion-resistant metal wire 2 which is fitted and integrated has a zebra-like shape in which the smooth surface is exposed as the same surface as the inner surface 1a of the cylindrical body 1, so that reciprocating motion of the piston and the like is repeated and severe. Even if it receives friction, the smooth surface of the abrasion-resistant metal wire 2 withstands this friction and prevents wear of the entire sliding surface and also prevents seizure, so that it can be used for a long time.

However, in order to manufacture such a lightweight cylindrical member having excellent durability, a cylindrical member made of a lightweight material such as a non-ferrous metal material or a synthetic resin obtained by casting in a separate process is used. After preparation, first, as a groove forming step, a groove for fitting a wire having a U-shaped cross section is formed on the inner surface of the cylindrical body 1 from one end opening to the other end opening of the cylindrical body 1 by a well-known groove cutting method. . Next, as a wire rod fitting step, a hardened steel wire having a circular cross section as the wear-resistant metal wire rod 2 is inserted into the groove formed in the previous step so that a part thereof protrudes from the inner surface of the cylindrical body 1. Fit it. Then, as a finishing step, a processing rod having a tapered guide formed at the tip with a straight rod portion insertable into the interior of the cylindrical body 1 is prepared.
The abrasion-resistant metal wire 2 fitted in the groove in the above-described process by rotating and inserting it into the inside of the
Of the above, if the portion protruding from the inner surface 1a of the cylindrical body 1 is pressed toward the inside of the groove to plastically deform the protruding portion together with a part of the inner wall of the cylindrical body 1, the aforementioned U-shaped cross section is obtained. The groove having a narrower opening width than the middle portion is deformed into a groove 3 for holding most of the wear-resistant metal wire 2, and the wear-resistant metal wire 2 is embedded in the inner wall of the cylindrical body 1. At the same time as being integrated, a portion exposed from the opening of the groove 3 is formed on a smooth surface which is the same as the inner surface of the tubular body 1, so that cutting of the groove for wire fitting and wear resistance It is possible to process in a short time only by performing a simple mechanical processing of embedding the conductive metal wire 2 and pressurizing, and a plating method which has environmental problems such as waste liquid treatment, and an anode which requires a long time. Simple equipment compared to the oxidation method improves wear resistance and seizure resistance. The ability to mass-produced at low cost lightweight tubular member having excellent durability was. After the above-described finishing step, if necessary, a final finishing process such as polishing the entire inner surface of the cylindrical body 1 may be performed.

[0010]

As is apparent from the above description, the lightweight cylindrical member having excellent durability according to the present invention is not only light as well as the conventional lightweight cylindrical member having an inner surface as a sliding surface, but also has a light weight. In addition, there is an advantage that the wear resistance and seizure resistance are much improved and long-term durability can be attained. In addition, the method for producing a lightweight cylindrical member having excellent durability according to the present invention is based on a plating treatment method conventionally used. Can solve the environmental problems such as waste liquid treatment that occurs when reinforced by the method, can be mass-produced in a shorter time than the anodizing method, and can be manufactured with simple equipment compared to the anodizing method and the sputtering method There are various advantages such as Therefore, the present invention is an extremely durable lightweight cylindrical member having a conventional inner surface as a sliding surface and a durable lightweight cylindrical member which has solved the problems of the method for producing the same and a method for producing the same. There is.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of a lightweight cylindrical member having excellent durability according to the present invention.

FIG. 2 is a partially cutaway front view showing a second embodiment of the lightweight cylindrical member having excellent durability according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 1a Inner surface 2 Wear-resistant metal wire 3 Groove for fitting

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J044 AA02 AA18 AA20 BA04 BA06 BB05 BB27 BC11 CC03 DA10 EA02

Claims (5)

[Claims] An abrasion-resistant metal wire is exposed in a groove for fitting a wire provided on an inner wall of a cylindrical body made of a lightweight material as a smooth surface part of which is flush with the inner surface of the cylindrical body. A lightweight cylindrical member having excellent durability, wherein the inner surface is formed as a sliding surface having excellent wear resistance. 2. The lightweight cylindrical member having excellent durability according to claim 1, wherein the wear-resistant metal wire is a hardened steel wire. 3. A spiral-shaped abrasion-resistant metal wire is provided in a spiral-fitting groove provided in a spiral shape on an inner wall of the cylindrical body, and a part of the spiral-shaped abrasion-resistant metal wire is formed as a smooth surface which is flush with the inner surface of the cylindrical body. The lightweight cylindrical member having excellent durability according to claim 1 or 2, wherein the lightweight cylindrical member is fitted and integrated so as to be exposed to the vehicle. 4. A rod-shaped abrasion-resistant metal wire is partly inserted into a plurality of straight or gently curved wire-fitting grooves provided on one end opening to the other end opening of an inner wall of a cylindrical body. Is integrated so as to be exposed as a smooth surface on the same plane as the inner surface of the cylindrical body.
2. A lightweight cylindrical member having excellent durability according to item 1. 5. A groove forming step of providing a groove for fitting a wire into an inner surface of a cylindrical body made of a lightweight material, and a wear-resistant metal wire is inserted into the groove so that a part thereof protrudes from the inner surface of the cylindrical body. A wire rod fitting step, wherein a part of the fitted abrasion-resistant metal wire projecting from the inner surface of the cylindrical body is pressed and plastically deformed so that the protruding portion is flush with the inner surface of the cylindrical body. A finishing step of forming the wear-resistant metal wire on the inner wall of the tubular body while forming the same on a smooth surface.