JPS62203608A - Rolling method for wire - Google Patents

Abstract

PURPOSE:To provide the simplification of a production process, reduction of a working space and improvement of productivity by adjacently disposing plural pieces of rolls having annular grooves which are sized differently from each other and are shifted in the axial line direction to form calibers and successively supplying a wire into such calibers. CONSTITUTION:The wire 32 to be rolled is successively passed through the 1st-4th rolling dies 22, 24, 26, 28 formed between the annular grooves of the adjacent rolls. The wire 32 emitted from one rolling die 22 is twisted about 90 deg., is shifted in the axial direction of the rolls and is introduced into the adjacent rolling die 24, by which the wire is rolled. This system is repeated until the wire is passed through the final finishing die 30, by which the wire is finished to a prescribed size. The wire is efficiently produced by the above- mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wire rod rolling method for obtaining a wire rod of a predetermined wire diameter by rolling a wire rod instead of drawing the wire using a wire drawing machine.

(Prior art) A conventional wire drawing machine consists of multiple dies arranged in tandem. A hand Yapustan was placed between the matching dice. For this reason, the wire drawing machine itself requires a large space, which has the drawback of increasing the work space. Furthermore, when processing with a wire drawing machine, work hardening is large due to the flow of the wire.

In particular, when the wire is made of an alloy, it requires several intermediate annealing steps, resulting in low workability.Also, it is necessary to constantly manage the dies. There was a drawback that a large amount of labor was required due to the need for tacking, so it is considered to use a rolling mill instead of a wire drawing machine to reduce work hardening. but.

A rolling mill can be safely equipped with several roll stands, and each stand is usually equipped with a gear transmission, so equipment costs can be reduced.
It was difficult to obtain small-diameter wire rods using ordinary water rolling mills or direct rolling mills due to the high dimensional accuracy.

(Objective of the Invention) An object of the present invention is to provide a wire rod rolling method that can obtain a thin wire rod by rolling instead of using a wire drawing machine, and can also make 3QG compact and inexpensive.

(Structure of the Invention) The wire rod rolling method of the present invention involves forming annular grooves having hole shapes of different sizes in adjacent rolls of rolls arranged in multiple stages by shifting them in the axial direction. , forming a first rolling die between opposing annular grooves of one adjacent roll;
A diameter smaller than the first rolling N1 is formed between the matching annular grooves of the next adjacent roll, which is composed of the second roll of this one adjacent roll and the third roll [1] of the next adjacent roll. A second rolling mold having a dimension of The wire rod to be rolled is sequentially passed through the first rolling die between the annular grooves of the rolls, and the wire rod drawn out of the first rolling die is twisted approximately 90' and transferred to the second rolling die for rolling, and the above operation is performed. It is characterized by repeatedly obtaining a wire rod of a predetermined wire diameter.

By doing this, there is no need for intermediate annealing because the work hardening is not as great as in the case of wire drawing with a wire drawing machine. Since the rolling process is carried out between 1 and 2, the transmission device is simple and the equipment cost is low, and the wire rod can be rolled at a large downstream rate, making it possible to obtain a wire rod with a small diameter.

(Example) An example of the present invention will be described in detail with reference to the drawings. Figs. 1 and 2 show a wire rod rolling method according to the present invention, and the rolling mills IO used in this wire rod rolling method are mutually connected. annular grooves 12a, 14a, 14b forming hole shapes of different sizes in
, 16a, 16b, 18a, 18b, 20a, and 20b, respectively, and arranged in multiple stages 12.1.
4,16. It consists of Chapter 8.20.

Annular grooves 14a and 14b, 16a and 16b, 18a and 18
b, 20a and 20b are respectively shifted in the axial direction of the roll, and annular grooves 12a and 14a, 14b and 1
6a, 16b and 18a, 18b and 20a are opposite to each other, and the same ζV method is applied to these opposing annular grooves. Therefore, the first groove is formed between the annular grooves 12a and 14a of the lower adjacent rolls 12 and 14.
A first rolling die 22 is formed between the annular grooves 14b and 16a of the next adjacent rolls 14 and 16.
A second rolling mold 24 smaller than ζ is formed, and third and fourth rolling molds 28 and 28 are similarly formed between the annular grooves of the adjacent rolls 16 and 18 and 20. be done. In addition, a pinch roll 20° of almost the same shape having an annular groove 20''a is arranged on the second side of the outermost roll 20, and a perfect circle is formed between the annular grooves 20b and 20'a of the rolls 20 and 20'. A mold 30 is formed to obtain a predetermined wire diameter.

In the method of the present invention, the wire rod 32 to be rolled is passed sequentially through the first to fourth rolling dies 22, 24, 28° 28 between the annular grooves of the adjacent rolls, and at this time, one rolling die 22, 24.
The wire rods 32 rolled with 6 out of 4 are each twisted approximately 90', ■.

Rolling die 24.26 adjacent to the roll axially shifted
．． The process moves to step 28 and rolling is performed with a shift from the rolling direction of the previous rolling die. The wire rod 32 rolled in this manner is finally passed through a die 30 to form a wire rod having a predetermined wire diameter of 32°. still,
As can be seen from FIG. 1, the first and third rolling dies 22.2
6 is a horizontally long oval shape, and the second and fourth rolling molds 2
4.28 has a vertically long oval shape.

The fourth rolling die has an oval shape but a shape close to a perfect circle. A guide means 34 for guiding the wire 32 from one rolling die to the next is shown in FIG.
4 consists of a kite roller 36 for folding back the wire 32 and two pairs of vertical rollers 38°38''.

Although it is preferable that the rolls 12 to 20 are driven separately,
If the roll diameter is small, common driving may be used.

In one embodiment of the present invention, the roll diameter is 150 am,
Using 140mm, 130am, 120mm, 110mm rolls 12 to 20 and pinch rolls 20° with a roll diameter of 110mm, phosphor bronze wire is rolled from a wire diameter of 8mm to an axis m.
It was possible to roll up to 100 mm in one stand. In this case, the rotation speed of the roll is 100 rpm and 150 rpm from the bottom.
, 23Orpm, 350rpm, 545rpm, 545
rpm. If rolling is carried out using a normal rolling mill, 4 passes and 8 rolls are required in the embodiment described in 1-1, but in the present invention, only 1 stand and 5 rolls are required. I understand.

FIG. 4 shows another embodiment of the invention, in which the rolling dies 22.26 are in the same axial position and the adjacent rolling dies 24.28 are respectively connected to the rolling dies 22.24. It is shifted in the axial direction. In this case, the axial length of each roll can be small, so the overall equipment can be small.

FIG. 5 shows a further embodiment of the invention, in which two stands 11, 11' are used, each with one stand! It is configured so that it can perform the same work as the second embodiment. In this embodiment, the first stand 11 has exactly the same structure as in the above embodiment, but the second stand is constructed so that the wire 32 gradually moves downward from a portion. In this embodiment, the wire can be rolled to an even smaller diameter.

(Effects of the Invention) According to the present invention, as described in -b-, since the wire rod is reduced in diameter by rolling, work hardening is not as large as in the case of drawing with a wire drawing machine, so intermediate annealing is considered. Since the rolling process is carried out between rolls arranged in multiple stages, the transmission device is simple and equipment costs are low. Since it can be rolled with a large area reduction ratio, it has the practical benefit of being able to obtain a wire rod with a small diameter.

[Brief explanation of drawings]

1 and 2 are a schematic perspective view and a side view, respectively, of a rolling mill used in the wire rod rolling method according to the present invention, and FIG. 3 is an enlarged perspective view of a part of FIG. FIG. 4 is a schematic perspective view of another embodiment of the invention, and FIG. 5 is a side view of another embodiment of the invention. 10---One rolling mill, 12, 14.16, 18.20
----One roll, 12a, 14a. , 14b, 16a, 16b, 18a, 18b. 20a---Annular groove, 22, 24, 26° 28---
--One rolling type, 32.32'---Wire rod. Special, 11 Applicant Figure 184 tn 12σ No. 5wJ

Claims (1)

[Claims] Annular grooves having hole shapes of mutually different sizes are formed by being shifted in the axial direction of adjacent rolls of a plurality of rolls arranged in multiple stages, and a first groove is formed between opposing annular grooves of one adjacent roll. A rolling die is formed, and the second of said one adjacent roll is
A second rolling die having smaller dimensions than the first rolling die is formed between the opposing annular grooves of the next adjacent roll, which is composed of the second roll and the third roll next to it, and the following steps are taken: Similarly, forming a third and subsequent rolling dies between opposing annular grooves of adjacent rolls one after another, and sequentially passing the wire rod to be rolled through the first rolling dies between the annular grooves of the one adjacent roll;
A wire rod rolling method characterized in that the wire rod drawn out of the first rolling die is twisted approximately 90 degrees, transferred to a second rolling die, and rolled, and the above operation is repeated to obtain a wire rod of a predetermined wire diameter.