JPS5846596B2 - Method for manufacturing wire rope with different diameter portions - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a wire rope having portions of different diameters.

Generally, a wire rope is finished to have a uniform diameter over its entire length, and the uniform diameter allows the wire rope to come into smooth contact with a sheave, drum, rope guide, etc.

However, when it is desired to attach a device to a wire rope or to control the movement of the device by driving the wire rope, this uniformity becomes an obstacle.

For this purpose, fasteners and gripping devices such as bolts, wedges, clamps, or swages have been attached, but these methods not only make it difficult to obtain sufficient fixing force (but also reduce the pressure that the rope strands receive, the This has the disadvantage that undesirable stress is generated in the rope due to local restraint and local bending action, which significantly reduces its lifespan.

For this reason, attempts have been made to form a locally increased diameter part in the wire rope by covering the core mesh of a part of the wire rope with an inserter made of plastic, metal, etc., or inserting it into the fiber core. However, it is troublesome to manufacture and has the disadvantage of high cost.

In order to eliminate such drawbacks, the present invention has different diameter portions in which the wire rope is forged-rolled over its entire length to form thinner diameter portions and thicker portions of arbitrary length and arbitrary number. A method for manufacturing a wire rope is provided.

To explain an embodiment of the present invention with reference to the drawings, FIG. 1 shows a side view of the wire rope of the present invention, in which a small diameter portion 2 having an arbitrary diameter a and an arbitrary length l throughout the entire length of the wire rope main body 1; Tapered portion 3 whose diameter gradually increases from an arbitrary diameter a to a unique diameter, an arbitrary length m from an arbitrary diameter
A large diameter portion 4 and a tapered portion 3' whose diameter gradually decreases from an arbitrary diameter are repeated over the entire length as one cycle.

The portion with diameter a is made thinner than the original diameter of the main body 1 by forge rolling, and the portion b is a portion where the reduction rate of the diameter due to forge rolling is smaller than that of the portion with diameter a, or the portion is not forge rolled.

Next, a method for manufacturing a wire rope according to the present invention will be explained (see FIGS. 3 to 5).

The wire rope main body 1 is forged rolled while being moved in the axial direction at a predetermined speed.

The forming die 5 of the forging rolling mill faces the wire rope main body 1
vibrates and moves in a direction approximately perpendicular to the axial direction of the
The wire rope main body 1 is pressurized by vibration, and the opening size of the mold 5 is adjusted by movement.

The range of movement of the molding die 5 is arbitrarily adjusted and controlled in conjunction with the length of movement of the wire rope main body 1 in the axial direction.

First, while moving the wire rope main body 1 in the axial direction at a predetermined speed, (a) pressurize it with the molding die 5 so that it has a predetermined diameter a and a predetermined length 1;

(b) Gradually adjust the opening size of the molding die 5 while applying pressure so that the diameter changes from a predetermined diameter a to a predetermined diameter S.

()→ Pressure is applied with the molding die 5 so that the predetermined diameter b and predetermined length m are obtained.

(In this case, if the dimension of the predetermined diameter is equal to the diameter of the original rope main body 1, no pressure is applied.

)) Gradually adjust the opening size of the molding die 5 while applying pressure so that the predetermined diameter becomes the predetermined diameter a.

The above steps (a) to (a) to (b) constitute one cycle, and by repeating this process, the forging pressure crab is applied over the entire length of the wire rope main body 1.

As described above, the present invention moves the wire rope in its axial direction and continuously or intermittently performs forging rolling to make the wire rope thinner than its original diameter.
Since it is related to a method for manufacturing a wire rope having a portion with a dog diameter reduction rate and a portion with a different diameter forming a portion with a small diameter reduction rate or a portion with a diameter reduction rate of zero, By controlling the opening dimensions, it is possible to form a different diameter part of any length and any diameter at the appropriate location on the main body of the wire rope, making it extremely easy to manufacture.
Further, the transition from the small diameter portion to the large diameter portion or from the large diameter portion to the small diameter portion is easy, and local bending stress is reduced.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a side view of a part of the wire rope, FIG. 2 is an enlarged side view of the main part thereof, and FIGS. 3 to 5 illustrate the method of the present invention. FIG. 1... Wire rope main body, 2... Part where the diameter decreases significantly, 3, 3'... Part where the diameter decrease rate changes, 4...・・Part where the rate of change in diameter is small or does not change, 5... Molding die.

Claims (1)

[Claims] 1. By continuously or intermittently forging rolling a wire rope while moving it in its axial direction to make it thinner than its original diameter, the diameter reduction rate and the diameter decrease over the entire length of the wire rope are reduced. A method for manufacturing a wire rope having a different diameter portion, characterized by forming a portion with a small reduction rate or a portion with a zero reduction rate in diameter.