JPH07113169B2 - Traveler for spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement of a traveler for a spinning machine used in a spinning machine, a twisting machine, and the like.

<Conventional technology and its problems> Metal spinning travelers for spinning machines conventionally used in spinning machines and twisting machines have various shapes such as vertical, horizontal, and conical, and are used according to their respective applications. ing.

However, in the recent spinning industry in a severe spinning environment where high production and high-speed spinning are carried out, a traveler having a large amount of abrasion resistance, less yarn breakage, and less yarn fluff is required from the viewpoint of stable operation and economical efficiency. Conventionally, hardened carbon steel steel containing 0.8 to 1.1% carbon has been used to provide this life resistance and anti-friction properties, but in terms of wear resistance and life, There is a problem that a product satisfying the above requirements cannot be obtained.

<Means for Solving Problems> The present invention solves the above-mentioned conventional problems.
The present invention provides a traveler having high wear resistance by forming alloy steel wire containing Cr and V elements as a material into a traveler shape and then increasing the carbon concentration by carburizing and quenching to form a martensite structure.

<Action> Carbon solid-soluted in austenite during carburization serves to strengthen martensite during quenching, and chromium improves the toughness of martensite. Furthermore, vanadium becomes a fine carbide, which has the effect of refining the crystal grains and improving the toughness.

<Example> An alloy steel wire containing 0.5% of C, 1.0% of Cr and 0.2% of V is formed into a predetermined traveler shape, carburized in an RX gas atmosphere at 900 ° C for 90 minutes, and then oiled at 850 ° C. Hardened inside 2
After tempering at 00 ° C. for 10 minutes, a traveler of the present invention containing 1.1% C was obtained.

As shown in Fig. 1, the cross-sectional metallographic structure of the above-mentioned traveler is carbonized in the martensite matrix (1) containing 1.1% C by carburization.
r is a solid solution and fine vanadium carbide (2) is dispersed.

The C content of the material is preferably 0.6% or less, and if it is more than that, the workability during traveler molding deteriorates. Also, Cr is 0.6-1.5%,
V is preferably 0.15 to 0.5%, and if it is less than the lower limit, the predetermined effect cannot be obtained, and if it is more than the upper limit, workability deteriorates. If the C content after carburization is less than 0.8%, the wear resistance cannot be obtained, and if it is more than 13%, it becomes brittle.

A spinning test was conducted using the above-mentioned traveler for a spinning machine of the present invention under the following operating conditions.

Thread: Ester / Cotton 40'S Ring: 3.2mm Flange 45mmφ Traveler: ZSB / hf No.5 / 0 Spindle speed: 15,000rpm The spinning test results are shown in Fig. 2 after 1 month of use. Inventive product A has a wear amount reduced by about 40% as compared with the conventional product B, and the life is remarkably improved. Regarding the number of thread breaks, as shown in Fig. 3, the number of thread breaks does not change from the conventional one in the initial stage of use, but the stable state can be maintained and it is about 1.
It has become possible to use it for 5 times as long.

<Effects of the Invention> Since the present invention has the above-mentioned structure, the initial yarn breakage does not change as compared with the conventional product, the stable operation is maintained, and the wear resistance can be improved to prolong the life of the spinning. It is an invention that has excellent effects such as stable operation and satisfying economic requirements.

[Brief description of drawings]

FIG. 1 is a cross-sectional metallographic view of a traveler for a spinning machine showing an embodiment of the present invention, FIG. 2 is a curve diagram showing the relationship between the number of days of use and traveler wear reduction, and FIG. 3 is the number of days of use and yarn breakage. It is a curve figure which shows the relationship with a number. (1) ... Martensite base (2) ... Vanadium carbide

Claims (1)

[Claims] 1. C: 0.6% or less, Cr: 0.6 to 1.5%, V: 0.15 to 0.
A traveler for a spinning machine, characterized by being formed into a predetermined traveler shape by using an alloy steel wire rod containing 5% and forming a martensite structure containing 0.8 to 1.3% of C by carburizing and quenching treatment.