JPS6118041Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to the structure of a ring for a spinning machine. Conventionally, rings used in spinning machines, twisting machines, etc. have a carbon content of 0.13 to 0.18% because the inner surface of the ring flange interacts with the traveler and is subject to severe wear.
After forming the steel material into a predetermined shape, it is given wear resistance by applying heat treatment such as quenching and tempering, but it has a Vickers hardness (hereinafter referred to as Hv) of 740 to 820.
is normal, and provides the wear resistance associated with this. However, due to the recent increase in speed and the spread of large packages, the circumferential speed of the traveler has increased, and with this, even higher wear resistance is required. A structure with a layer of hard chrome plating, tuftride, etc. is used. According to the above structure, the hardness is increased to Hv900-1300, and the wear resistance is improved to some extent, but since hard chrome plating only has a plating layer attached to the ring surface, fluctuations in the spinning force cause the traveler to suddenly When force is applied to the plate, the plating layer peels off due to the traveler. In addition, in the case of Tuftride treatment, from the ring surface
Since the hardness increases from about 0.2 mm, the ring surface wears out during spinning, causing fluctuations in ballooning tension and causing thread breakage. The present invention eliminates the above drawbacks, and the first
As shown in the figure and Fig. 2, at least the part of the ring flange that contacts the traveler has Ti, B, V,
Diffusion and penetration of metal selected from W and Ta, Hv1400
or more hardness, depth 5μ~100μ, preferably 5μ
By forming a diffusion permeation layer in the range of .mu. to 30.mu., a ring for a spinning machine can be obtained which has excellent lubricity and abrasion resistance, has little fluctuation in spinning force, and can reduce yarn fuzz. Embodiments of the present invention will be described below with reference to the drawings. Example 1 A cylindrical material made of carbon steel for machine structures (S15CK) was formed into a ring 1 by machining such as lathe, and then 60% boron carbide, 20% anhydrous borax, 5% polyvinyl alcohol, and 15% water. Apply a paste-like mixture with a thickness of about 1 mm to the part 2 that will be in contact with the traveler, dry at 140℃, and then heat at 900℃.
Heat for 10 minutes, then wash the ring surface with a jet stream of hot water. The ring 1 obtained by the above method has an iron boride layer 3 of Hv 1600 to 1800 only on the contact part 2 where it interacts violently with the traveler, as shown in Figure 1 A and B, and the layer has a thickness of about 30μ. Obtainable. Example 2 A cylindrical material made of carbon steel for machine structures (S15CK) was formed into ring 1 by machining such as lathe, and then 60% ferropanadium and 20% anhydrous borax were formed.
A paste mixture consisting of 5% polyvinyl alcohol and 15% water by weight was applied to the ring surface 2 of the ring 1, including the contact area with the traveler, to a thickness of approximately 2 mm, dried at 140°C, and then heated to 950°C. Approximately 30
After heating for a minute, the surface of the ring 1 is washed with a jet stream of hot water. The ring 1 obtained by the above method has an Hv3000~
A layer of 3400 panadium carbide is constructed as shown in FIG. In addition, in each of the above examples, the Bitkers hardness was 1400.
The reason for providing the diffusion layer of metal selected from Ti, B, V, W, and Ta with a thickness of 5 to 30μ is that if the thickness is 30μ or more, the ring will slide on the traveler surface while staying and slipping. This is because under severe friction conditions, the ring is likely to chip due to impact from the traveler, and if it is less than 5μ, the diffusion permeation layer will wear out early during high-speed operation, shortening the ring life. In addition, the reason why the hardness of the diffusion layer is set to Hv1400 or higher is because of the relationship between the traveler's surface hardness and lubrication performance.If the surface hardness of the ring is low, it will wear more easily. It is necessary to increase the thickness, but the thicker it is, the more likely it is to chip. Experiments were conducted using the ring of the present invention having the above configuration and a conventional ring, and the following results were obtained. Conditions Spun yarn: Polyester, cotton blend 45′ ^S ring: Single ring 45〓 Spindle rotation speed: 14500r.pm

[Table] According to the configuration of the present invention as described above, Ti is applied only to the part of the surface of the ring flange that contacts the traveler.
A wear resistance and lubricity are imparted to the ring by providing a diffusion hardening layer of B, Ta, W, etc., and a traveler with a high surface hardness and a lubricating coating is provided with the above-mentioned diffusion permeation layer and wear resistance. Even under severe friction conditions when used in combination with the traveler, product A of the present invention has good compatibility with the traveler, and as shown in Figure 3, the variation in spinning force is much smaller and stable compared to conventional product B. do. Therefore, the number of broken threads is reduced, and as shown in Figure 4, a high quality thread with less fuzz can be obtained.
Traveler replacement cycle will be extended. Furthermore, the ring is durable and has the effect of increasing the operating speed of the spinning machine and improving operational efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1A is a sectional view of a single flange ring, FIG. 2B is a sectional view of a vertical ring, and FIG. FIG. 2B is a cross-sectional view of the vertical ring, FIG. 3 is a curve diagram showing the relationship between the spindle rotation speed and spinning force, and FIG. 4 is a graph showing the relationship between the fluff length and the number of fluffs generated. 1...Ring, 2...Contact portion, 3...Iron boride layer, 4...Vanadium carbide layer.

Claims (1)

[Scope of utility model registration request] At least the part of the ring flange that comes into contact with the traveler has a depth of 5μ to 30μ from the surface, and
With a hardness of over 1400 on the Bitkers scale, Ti, B,
A spinning machine ring characterized by forming a diffusion permeation layer of a metal selected from V, Ta, and W.