KR960016472B1 - Ring for spinning machine - Google Patents

Abstract

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Description

Anti-air ring

FIG. 1 is a cross-sectional view of a cutaway portion showing an embodiment of the anti-release ring of the present invention.

2 is an enlarged view in which the main part of the anti-release ring of the present invention is enlarged.

3 is a curve diagram showing the relationship between the heat treatment temperature and the hardness of the nickel-phosphorus alloy film.

(A) of FIG. 4 is a curve which shows the surface roughness before grinding | polishing of a composite plating layer.

4B is a curve diagram showing the surface roughness of the composite plating layer after polishing.

FIG. 5A is an explanatory diagram showing the surface state of the composite plating layer before polishing.

5B is explanatory drawing which shows the surface state after the grinding | polishing process of a composite plating layer.

6 is a curve diagram showing the relationship between the spindle rotational speed and the frictional resistance index.

7 is a curve diagram showing the relationship between the distance from the surface of the ring of the present invention and the Vickers hardness.

* Explanation of symbols for main parts of the drawings

1: Release ring 2: Body part

3: flange 4: ring neck

5: ring flange 6: composite plating layer

7: nickel-phosphorus alloy 8: hard fine particles

TECHNICAL FIELD The present invention relates to a spinning ring that is used for spinning spinning, and particularly exhibits excellent performance in high speed spinning.

The conventional anti-release ring is formed by turning low carbon steel as a raw material, and carburizing quenching treatment as a surface hardening treatment. However, in the conventional ring, when the spindle speed of the spinning machine is used at a high speed of 20000 rpm or more, the frictional resistance between the ring and the traveler increases and the frictional heat rises rapidly, thereby causing the traveler to burn out prematurely. It was not possible to carry out continuous operation by scattering.

Thus, in order to solve the above problems, it has also been proposed to carry out a composite plating in which hard fine particles are dispersed on the surface of the ring flange (see Japanese Patent Laid-Open No. 61-37999).

However, in order to extend the service life, the above-mentioned improved ring has a high surface roughness when the plating thickness is increased, and hard particles are buried in the plating film. Therefore, the improved ring has a sufficient effect in the ultra-high rotation range with a spindle speed of 24,000 rpm or more. It was difficult to show.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and its object is to improve wear resistance of the ring itself, reduce wear of the traveler traveling on the ring flange, and ensure stable operation even in an ultra-high speed range. To provide an anti-release ring that can be.

In order to achieve the above object, the anti-release ring of the present invention, at least on the surface of the ring flange in contact with the traveler, a hard fine particles as a vacancy material, a nickel alloy containing nickel-phosphorus as a matrix (matrix) In the anti-release ring provided with the plating layer, the surface area of the composite plating layer described above has an area of 5 to 40% of the fine particles, and the surface roughness has a centerline average roughness of Ra 0.2 µm or less.

In addition, the thickness of the above composite plating layer is made 5 to 35 mu m.

The Vickers hardness of the composite plating layer is set to Hv 900 to 1200, and the hardness of the ring base material immediately below the plating layer is set to Hv 500 to 650.

However, the hard fine particles, which are vaccinated materials of the composite plating, use at least one or more selected from silicon carbide, tungsten carbide, boron nitride, and aluminum oxide. It is most preferable because it is easy to dissipate frictional heat.

If the occupied area ratio of the hard fine particles is less than 5%, the wear resistance of the ring itself is inferior. In addition, when the above-mentioned occupancy area ratio exceeds 40% and the surface roughness exceeds Ra 0.2 µm which is the centerline average roughness, the slipperiness between the ring and the traveler deteriorates, not only the breakage of the thread occurs at the start, but also the high speed rotation. In the range of ultra high-speed rotation, the frictional resistance index rises rapidly, causing early burnout and scattering of the traveler, making continuous discharge impossible. Therefore, the area of occupancy of the hard fine particles is 5 to 40%, preferably 10 to 35%, and the surface roughness is preferably 0.2 µm or less of the average roughness Ra of the center line.

When the thickness of the composite plating layer is less than 5 µm, peeling and abrasion occur in the high-speed rotation range, and when the thickness of the composite plating layer exceeds 35 µm, the plating treatment cost increases, which is not preferable. Therefore, the thickness of the composite plating layer is 5 to 35 µm, preferably 16 to 35 µm, and 20 to 35 µm is most suitable in view of the life and cost.

(Example)

EMBODIMENT OF THE INVENTION Below, the Example of this invention is described.

Cylindrical steel material S15CK is cut to form a ring 1 (FIG. 1), carburizing quenching and surface treatment.

The ring 1 has a flange 3 on the outer circumferential surface of the cylindrical body portion 2, a ring neck portion 4 (ring neck portion) which is continuous on the upper portion of the flange 3, At the top of the ring neck 4, there is a ring flange 5 in which the ring traveler slides.

The above-described ring 1 is subjected to plating pretreatment such as removing fatty powder and washing with acid, and then, at least on the surface of the ring flange 5, the nickel-phosphorus alloy 7 is formed by electroless plating. In the base material, a SiC composite Ni-p amorphous alloy plating obtained by dispersing and depositing silicon carbide 8 having an average particle diameter of 1 µm as a vacant material was coated.

The ring (1) subjected to the SiC composite Ni-p amorphous alloy plating is heated by heat treatment at a heat treatment temperature of 400 ° C. for about 1 hour.

The SiC composite Ni-p amorphous alloy plating described above has a high hardness of Hv 1000 on the surface of the ring 1 in which the nickel-phosphorus of the base metal is crystallized, and Ni ₃ -P and Ni crystals are simultaneously present. A composite plating layer 6 was formed in which adhesion between the vaccinated silicon carbide and the base material was enhanced (FIG. 2).

Next, the surface of the ring flange 5 in contact with and sliding of the ring traveler is polished by lapping to form a thickness of the composite plating of 30 µm, and the SiC has a surface area of 25.6%. The desired anti-release ring 1 finished with a smooth surface having a surface roughness of Ra 0.056 µm or less, which is a centerline roughness.

4 (a) and (b) show data of surface roughness before and after polishing, and FIG. 5 (a) shows the surface state of the ring flange 5 before polishing. FIG. 5B shows the surface state of the ring flange 5 after polishing, and the surface of the composite plating layer 6 has an area ratio of 25.6% of SiC (8) in the nickel-phosphorus alloy (7) of the base material. (Pearce image analysis) It shows the coexistence state which appeared.

In the above embodiment, silicon carbide was used as the hard fine particles dispersed and vaccinated in the composite plating layer 6, and tungsten carbide, boron nitride, and aluminum oxide can be used in at least one kind or two or more kinds. In addition, the particle diameter of the hard fine particles is preferably 0.2 to 0.3 µm, and when the particle diameter is less than 0.2 µm, the wear resistance of the ring is inferior. In addition to shortening the wear resistance of the ring significantly reduced.

The area of occupancy of the hard fine particles is 5 to 40%, preferably 10 to 30%, and 2 to 15% by weight is suitable as the content to be contained in the base material.

The heat treatment conditions of the above-described ring 1 are performed at a heat treatment temperature of 400 ° C. and a heat treatment time of about 1 hour, but a heat treatment temperature of 320 to 420 ° C. and a heat treatment time of about 1 hour to 2 hours. By carrying out the heat treatment under the above heat treatment conditions, it is possible to obtain a high hardness of Hv 900 to Hv 1200, and the hardness of the base material is Hv 500 to Hv 550, preferably Hv 500 to about 0.3 mm from the surface of the ring. Hv 650 can be obtained, and the wear resistance of the ring can be improved (FIGS. 3 and 7).

The surface roughness of the ring flange surface was set to a centerline average roughness Ra of 0.056 µm, but Ra may be 0.2 µm or less.

As a nickel alloy used as a base material, a nickel-phosphorus alloy, a nickel- tungsten-phosphorus alloy, etc. are used.

Next, the surface roughness Ra obtained by carburizing and quenching the conventional anti-carbon steel (the present invention A) obtained by the present invention and the conventional low carbon steel (the conventional product B) and the conventional composite plating was 0.4 µm. A comparative test was conducted using a ring for sealing (comparative product C).

test requirements

Thread: ester / cotton 45 ^'S

Ring: 3.2mmF 41mmφ × 57.5mmφ

Ring Traveler: YS-2 / hf 11/0 (Nickel Plated Product)

Spindle Speed: 16000rpm ~ 30000rpm

6 shows the friction resistance index between the ring traveler and the ring at each spindle speed under the above discharge condition.

There was no significant difference between the present invention (A), the conventional product (B), and the comparative product (C) until the spindle rotational speed was 16000 rpm to 18000 rpm, and no significant difference was found in the frictional resistance index.

When the spindle rotation speed exceeded 18000 rpm, the frictional resistance index of the conventional article B was remarkably increased, but the present invention A did not show a sharp rise and was gentle.

In addition, when the conventional product (B) became 22000 rpm or more, the frictional resistance index rapidly increased, and at 24000 rpm or more, burnt wear of the ring leveler progressed, and continuous discharge became impossible.

In addition, in the comparative product (C), the frictional resistance index increased sharply in the ultrahigh-speed rotation range of 24000 rpm or more, and the number of breaks of the yarn increased significantly.

In the present invention (A), the spindle rotational speed did not show a sharp rise even in the ultra high speed range of 24000 rpm to 30000 rpm, exhibited a stable low frictional resistance index, and almost no wear of the ring traveler, thus enabling continuous discharge (sixth). Degree).

As described above, the present invention forms a composite plating layer containing a hard fine particle as a vacancy material and a nickel alloy containing nickel-phosphorus, and occupies 5 to 40% of the hard fine particle on the surface of the composite plating layer. The surface roughness of Ra is 0.2 μm or less, which improves the wear resistance of the ring traveler, reduces wear on the traveler, and also maintains a high speed range between the ring and the traveler, even at high speeds with a spindle speed of 24000 rpm or more. Good affinity makes stable continuous operation possible.

In addition, the peeling of the composite plating layer does not occur, and not only the performance of the ring can be maintained for a long time, but the burner does not burn out, and the life of the traveler is also extended.

In addition, by setting the hardness of the composite plating layer to Hv 900 to 1200 and the hardness of the ring base material directly below the composite plating layer to Hv 500 to 650, the ring wear amount is reduced and the life of the ring can be further extended. It is an invention.

Claims (4)

An anti-fouling ring having at least a ring flange in contact with a traveler and having a composite plating layer containing a hard fine particle as a vacancy material and a nickel alloy containing nickel-phosphor as a base material, wherein the occupied area is on the surface of the composite plating layer. And 5 to 40% of the hard fine particles, and the surface roughness of the centerline average roughness Ra is 0.2 μm or less. The anti-fogging ring according to claim 1, wherein the composite plating layer has a thickness of 5 to 35 µm. The antifouling ring according to claim 1, wherein the hardness of the composite plating layer is set to Hv 900 to 1200, and the ring base material hardness immediately below the composite plating layer is set to Hv 500 to 650. The anti-corrosion ring according to claim 1, wherein the hard fine particles are at least one or more of silicon carbide, tungsten carbide, boron nitride, and aluminum oxide.

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