JPH02182926A - Ring for spinning machine - Google Patents

Abstract

PURPOSE:To obtain the title ring having improved abrasion resistance, lubricating properties, etc., in high-speed area of a fine spinning frame, etc., by packing the recessed part of flange surface with a solid lubricant consisting essentially of MOS2 and WS2 and baking the lubricant to bind the lubricant to the recessed part and forming the surface of projected part into a specific roughness. CONSTITUTION:A solution containing a solid lubricant consisting essentially of MOS2 or WS2 and medium consisting of an epoxy resin is applied to the recessed part 4 (having 3-8mu/ depth and 30-70% area ratio) of flange surface (adjusted so that surface roughness, Rmax is 3-8mum and area ratio of the recessed part 4 is 30-70% by electrolytic treatment) of a ring made of a steel such as carbon steel and the solution is baked to bind the solid lubricant to the recessed part. Then roughness Ra of the projected part 6 is adjusted to <=0.2mum by lapping to provide the aimed ring.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ring for spinning machines, which is used in spinning machines, yarn twisting machines, etc., and has improved wear resistance and lubricity, especially in high-speed ranges.

(Prior technology) Conventional rings for spinning machines have been surface-polished from the beginning of spinning in order to ensure stable travel of the traveler and prevent yarn breakage, or have been coated with a solid lubricant to form a conforming surface at an early stage. Chemical conversion coating treatments, such as phosphate coatings, etc., are being carried out.

However, in today's spinning industry, where high production and high-speed spinning are carried out under strict spinning conditions, improvements in operational efficiency are required. There is a need for a ring that can operate stably over a long period of time.

(Problem to be solved by the invention) Therefore, in the ring with the conventional surface finish described above, the frictional resistance is large at the beginning of operation, so a break-in operation is essential. has a friction-reducing effect and eliminates the need for break-in, but
Since the adhesion force with the base is small, it is quickly scraped off or peeled off and falls off, resulting in a sudden increase in frictional resistance, causing problems such as traveler burn, thread breakage, and other disturbances in spinning.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and at least the flange surface of a ring for a spinning machine, the outermost convex part surface is finished to a surface roughness Ra of 0.2 μm or less. In addition, the problem was solved by embedding a solid lubricant mainly composed of MoS or WS2 in the recessed part at the bottom surface, which has a depth of 3 to 8 μm and an area ratio of 30 to 70%, and is fixed by baking. It is resolved.

That is, according to the present invention, the necessary minimum friction-reducing effect can be obtained at the initial stage of operation, and the coating layer surrounded by highly wear-resistant bases maintains the friction-reducing effect for a long period of time.

Improved distribution In the structure of the present invention, the surface roughness of the outermost surface is Ra=
If it exceeds 0.25 μm, the frictional resistance at the beginning of operation will increase, and if it is less than Ra - 0.2 μm, if the area ratio of the concave portion is less than 25%, the friction-reducing effect will be insufficient and a break-in operation will be required at the beginning of operation. becomes. If the area ratio of the recesses exceeds 75%, the initial friction reduction effect is large, but the load on the base increases and wear of the base is accelerated, resulting in early peeling and falling off of the coating layer, resulting in rapid wear and tear. This results in an increase in frictional resistance. Furthermore, if the depth of the recess is less than 2μ, the anti-friction effect will not last, and 1
If it exceeds 0 μ, the wear resistance of the base itself deteriorates.

(Example) An embodiment of the present invention will be described below based on the drawings.

As shown in Fig. 1, a steel material such as carbon steel or alloy steel, for example, carburized case-hardened steel, is turned into a predetermined shape of a ring (1) and then heat treated. The surface of the base (3) of (2) is subjected to shot blasting or electrolytic treatment, and as shown in Figure 2, the surface roughness is in the range of Rmax = 3 to 8 μm and the area ratio of the recesses (4) is 30 to 70%. Adjust the surface to make it uneven. A solid lubricant (5) containing a solution containing MoS2 as a main component and an epoxy resin as a medium is embedded in the recess (4) by coating or other means, and is fixed by baking.

Furthermore, the convex portion (6) on the outermost surface of the flange portion was finished by lapping to have a surface roughness of Ra=0.2 μm or less, thereby forming a ring for a spinning machine according to the present invention.

In order to measure the performance of the rings for spinning machines of the present invention obtained in the above examples, a spinning test was conducted under the conditions shown below.

Test conditions Ring: N01 flange 41 mmφ (case hardened steel) material, the same heat treatment, and four types of surface finishes were used as samples.

A: Invention ring (surface roughness Ra = 0.2μ) B: Comparative example ring (surface roughness Ra = 0.3μ) C: Conventional ring (surface roughness Ra = 0.2μ) D: Conventional ring (C 5-7μ M o S z coating) Traveler:
ZSB/hf No. 410 Thread: Ester/Cotton 45
13 Spindle rotation speed: ""18000r, p6m.

The results of the spinning test are shown in Figure 3. Performance was judged based on the wear amount of the traveler set in each ring, and the initial wear amount increases in the order of D<A<C<B. The friction-reducing effect of the lubricant has been recognized, and it is expected that A and D will be able to omit the usual low-speed break-in operation, but looking at the change in wear over time, the amount of wear in D increases rapidly at the 2nd turn. However, due to the wear of the coating, it became impossible to spin.
C also gradually increased in wear and became unspinning. Comparative example B is due to increased surface roughness, resulting in thicker initial wear (and wear rapidly increases before receiving the friction-reducing effect of the solid lubricant).

In addition, ring A for a spinning machine according to the present invention showed a gradual tendency for wear to increase, and stable spinning could be maintained for a long period of time because the anti-friction effect of the solid lubricant was maintained without decreasing.

Note that the evaluation method for the above test was based on the amount of wear on the traveler, but this is because there is usually a correlation between the performance of the ring and the degree of wear on the traveler.

(Effects of the Invention) Since the present invention is configured as described above, steady operation in a high speed range is possible with a short break-in operation, stable operation can be performed for a long period of time, and operational efficiency is greatly improved. . In addition, since the anti-friction effect lasts for a long time, this invention has the effect of significantly extending the life of not only the traveler but also the ring.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a ring for a spinning machine showing an example of the implementation of the present invention, Fig. 2 is a partially enlarged view of Fig. 1, and Fig. 3 is a change over time in the amount of wear of a traveler set in a test ring. This is a graph showing. (1)...Ring, (2)...Ring flange, (3)...Figure base, (4)...Recess, ( 5)・・・Solid lubricant, (6)・・・Convex diagram test 1 open (hr)

Claims (1)

[Claims] MoS_2 is applied to at least the recesses on the flange surface of the uneven surface where recesses with a depth of 3 to 8μ occupy 30 to 70% of the area ratio.
Alternatively, a solid lubricant mainly composed of WS_2 is filled and fixed together by baking, and the convex portion has a surface roughness Ra = 0.
．． A ring for a spinning machine characterized by being formed to a diameter of 2 μm or less.