JPH0362481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a linear body rolling mill.

The present applicant has previously proposed a system consisting of multiple pairs of rolling rolls for rolling a linear body, which is a rolling material, from various angles, and these multiple pairs of rolling rolls are arranged on mutually parallel axes, and each The pair of rolling rolls are
It has a female inclined shoulder surface and a male inclined shoulder surface which are inclined with respect to the axis and face each other across a rolling gap, and some of the plurality of pairs of rolling rolls are female with respect to the other rolling rolls. We have proposed a linear body rolling mill in which die inclined shoulder surfaces and male die inclined shoulder surfaces are alternately formed in opposite directions (see Japanese Patent Publication No. 1-23201).

In this rolling mill, all the rolling rolls are arranged on parallel axes and are oriented in the same direction, so the overall equipment can be made smaller, and changes in the dimensions of the product can only be made by adjusting the rolling gap between each pair. There are advantages to doing so.

However, in the rolling mill according to this proposal, twisting occurs in the linear body when it enters the second stand from the first stand. Referring to FIGS. 1 and 2, the linear body 1 is rolled from a circular cross-section to a rectangular cross-section as shown in FIG. 2A on the first stand.
enters the pair of rolling rolls 4, 5 with inclined shoulder surfaces 2, 3 of the second stand, but after the linear body 1 starts contacting the rolling rolls 4, 5, the rolling rolls 4, 5
Until the linear body 1 is rolled with the rolling gap g, the points 6a, 6b,
6c and 6d, and as the rolling rolls 4 and 5 rotate, the distance between the shoulder surfaces 2 and 3 narrows and they are displaced to positions 2b and 3b shown by dotted lines in FIG. 2B, and the linear body 1 The point where is in contact with shoulder surfaces 2 and 3 is 6
a, 6b, 6c, 6d to 6'a, 6'b, 6'c,
6'd. For this reason,
In the process of entering the linear body 1 into the rolling rolls 4 and 5, before the linear body 1 undergoes plastic deformation, a force a that tends to rotate the linear body 1 in the clockwise direction in FIG. 2C is applied to its cross section with its center as an axis. Therefore, whereas the linear body 1 should originally have the cross-sectional shape shown in FIG. 2D,
In reality, as shown in Fig. 2E, the linear body 1 falls down within the rolling gap g, so the opposite short side 1a of the linear body 1 should be rolled down, but not the long side 1a. As a result, the side surface 1b is rolled down, and as a result, the long side surface 1b of the linear body 1 becomes longer and becomes a flat strip, which has the disadvantage that the linear body 1 cannot be rolled. In addition, the linear body 1
As will be described later, in the first stand, there is a tendency for the vertical portion to gradually stand up as it is twisted in the opposite direction to that shown in Fig. 2C, that is, counterclockwise; Since the force trying to rotate the linear body 1 in the clockwise direction as shown in FIG. It is difficult to roll it.

SUMMARY OF THE INVENTION An object of the present invention is to avoid the above-mentioned drawbacks and to propose a linear body rolling mill that can perform good rolling while arranging all rolling rolls on parallel axes.

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 3 shows a linear body rolling mill 10 according to the present invention, and the rolling mills 10 are arranged in tandem on mutually parallel axes. at least two of the first and second
Two stands 31 and 32 are provided, and the second stand 32 is arranged downstream of the first stand 31. Each stand 31, 32 has one
It consists of pairs of rolling rolls 12, 12' and 14, 14'. Note that the same stands as the first and second stands may be arranged in sequence on the downstream side of the second stand 32.

Rolls 12, 12' of the first stand 31
As shown in FIG. 3, the rolling surfaces of the rolls for rolling the linear body 1 are inclined at an angle θ with respect to the axes x of the rolling rolls 12 and 12', and are opposed to each other with a rolling gap g between them. They each have a surface 16 and a male sloped shoulder surface 18. In the illustrated embodiment, the female beveled shoulder 16 is in the form of a V-shaped groove 17 in cross-section, and the male beveled shoulder 18 is in the form of a flange with a V-shaped cross-section.

Rolls 14, 14' of second stand 32
is a roll rolling surface that is arranged downstream of the first stand 31, parallel to the pair of male and female rolling rolls 12, 12' of the first stand 31, and that rolls the linear body 1. is the rolling roll 14,
It consists of a pair of cylindrical rolling rolls that are parallel to the 14' axis, and these rolling rolls have a semicircular cross section at the part through which the linear body 1, which is the rolled material, enters and passes, as shown in FIG. or an appropriate form of Caliba 1
It is preferable to have 4a, 14'a.

As shown in FIG. 3, the rolling mill 10 of the present invention has the following features:
an exit side guide member 20 which is provided on the exit side of the rolling rolls 12, 12' of the first stand 31 and guides the linear body 1, which is the rolled material, so as to forcibly twist it so that its longitudinal portion is vertical; second stand 3
It is preferable to provide a forced guide means 24 consisting of an inlet side guide member 22 which is provided on the inlet side of the two rolling rolls 14, 14' and maintains this elongated vertical state of the linear body 1.

Next, the operation of the linear body rolling mill 10 of the present invention will be described. The linear body 1, which is a rolling material and has a circular cross section, passes through the first stand 31 and the second stand 32 sequentially and is rolled. . The first stand 31 is composed of rolling rolls 12 and 12' whose rolling surfaces for rolling the linear body 1 are inclined with respect to the roll axis, so that the linear body 1 can be rolled as shown in FIG. 5A. The linear body 1 is guided by the forced guide means 24 so that its longitudinal portion becomes vertical as shown in FIG. 5B, and is fed into the second stand 32. Therefore, in the second stand 32, the short side surface 1a of the linear body 1 is engaged with the engagement surface of the rolling rolls 14, 14' and the short side surface 1a is rolled down, as shown in FIG. 5C. It can be rolled reliably.

In the illustrated embodiment, as shown in FIG.
The cylindrical rolling rolls 14, 14' have a calibar 14a,
14'a, but these carriers may not be provided. In this case, since the linear body 1 is easily deformed as shown in FIG. 6, it is necessary to optimally adjust the width reduction ratio and cross-sectional aspect ratio.

Further, in the above embodiment, the forced guide means 24 is provided between the first and second stands 31 and 32. The forced guide means 24 can be omitted. That is, as already mentioned, the linear body 1 is twisted counterclockwise by the inclined shoulder surfaces 16, 18 of the rolling rolls 12, 12' of the first stand 31, as shown in FIGS. Due to this twisting, the vertically long portion gradually stands up as it moves away from the first stand 31, and further falls in the opposite direction as it moves away from the first stand 31. Therefore, by arranging the second stand 32 at a position where the linear body 1 exiting the first stand 31 stands up or almost stands up as shown in FIG. 7C, D or E, The short side 1a of the linear body 1 on the second stand 32
Forced guide means 2
4 can be omitted.

Further, in the above embodiment, two stands 31,
32, but as already mentioned, after the second stand 32, the first and second stands 3 are used.
The rolling reduction ratio may be further increased by arranging third and fourth stands similar to Nos. 1 and 32 and repeating the above rolling operation. In this case, if the material coming out of the second stand 32 is nearly circular as shown in FIG. As shown in the figure, if the cross section of the material is close to rectangular, a forced guide means 24 is provided or the fourth stand is placed at a position where the longitudinally long portion of the material having a rectangular cross section is vertical.

To describe a specific example of the present invention, when rolling a copper wire with a diameter of 3.2 mm across two stands 31 and 32, in the first stand 31, the rolling roll 12,
The circumference diameter of the part that is in contact with the 12' material is approximately 50
mm, and in the second stand 32, the circumferential diameter of the rolling rolls 14, 14' was approximately 100 mm. 1st
In the second stand 31, an egg-shaped gap is formed, and in the second stand 32, a round-shaped calibar 1 is formed.
4a and 14'a were formed.

In this way, in the first stand 31, the linear body 1 is approximately 2.1×3.4 (7
mm), and in the second stand 32, the linear body 1 has a cross section of 2.4×2.4mm, as shown in FIG. 8B.
(4.7mm). Furthermore, it was possible to obtain a linear body having a circular cross section with a diameter of up to about 1.8 mm through the third and fourth stands.

According to the present invention, as described above, the linear body that is rolled by the first stand and rolled by a pair of male and female rolling rolls whose roll rolling surfaces are inclined with respect to the axis of the rolling rolls is In the second stand, in order to ensure that the short side surface is rolled down, the rolling surface of the roll that rolls the linear object engages with a pair of cylindrical rolling rolls that are parallel to the axis of the rolling rolls, so that the linear object to be rolled is The body is not rolled flat, so a product of good quality can be obtained, and the rolling rolls of all stands are arranged so that their axes are parallel, so the rolling mill does not need to be large. There is no.

[Brief explanation of drawings]

Figure 1 shows the second rolling mill proposed earlier by the applicant.
Figures 2A, B, C, D, and E each show the deformation state when the linear body is rolled in the rolling mill shown in Figure 1. 3 is a schematic perspective view of a linear body rolling mill according to the present invention, FIG. 4 is an enlarged sectional view of a main part of a modification of the cylindrical rolling roll of the second stand, and FIG. 5A, B and C are cross-sectional views sequentially showing rolling states by the rolling mill of the present invention, FIG. 6 is a cross-sectional view of the rolled material when the cylindrical rolling roll does not have a carrier bar, and FIG.
Figures A, B, C, D, and E show that when the forced guide means is not provided, the rolled material coming out of the first stand is
FIG. 8A is a cross-sectional view showing how the vertically elongated portion gradually stands up as it moves away from the stand.
B is a sectional view showing dimensions in a rolled state by the rolling mill of the present invention. DESCRIPTION OF SYMBOLS 1... Linear body, 1a... Short side, 1b... Long side, 10... Linear body rolling mill, 12, 12'... Male and female pair of rolling rolls, 14, 14'... Cylindrical rolling roll,
16... Female type inclined shoulder surface, 18... Male type inclined shoulder surface, 2
0, 22... Guide member, 24... Forced guide means,
31...first stand, 32...first and second stands.

Claims (1)

[Claims] 1. At least two stands, a first and a second stand, through which the linear body to be rolled passes, the first stand consisting of a pair of male and female rolling rolls that engage with each other,
The female rolling roll has a female inclined shoulder surface where the roll rolling surface for rolling the linear body is inclined with respect to the rolling roll axis, and the male rolling roll has a rolling gap of the female inclined shoulder surface. The rolling surfaces of the rolls facing each other and rolling the linear object have a male inclined shoulder surface that is inclined with respect to the axis of the rolling roll, and the linear object to be rolled is placed between the inclined shoulder surfaces of the female die and the male die. forming a rolling gap for rolling on opposing sides, the second stand being disposed downstream of the first stand and parallel to a pair of male and female rolling rolls of the first stand; A linear object rolling mill comprising a pair of cylindrical rolling rolls whose rolling surfaces for rolling the linear object are parallel to the axis of the rolling rolls. 2. The linear body rolling mill according to claim 1, wherein the pair of cylindrical rolling rolls includes a carrier into which the linear body engages. 3. At least two stands, a first and a second stand, through which the linear body to be rolled passes, and a forced guide means disposed between the first and second stands, the first stand being mutually It consists of a pair of male and female rolling rolls that engage with each other. The female die and the male die have a male die inclined shoulder surface which faces each other across a rolling gap and whose rolled-down surfaces of the rolls for rolling the linear body are inclined with respect to the rolling roll axis, and the female die and the male die are inclined. A rolling gap is formed between the shoulder surfaces for rolling a linear body to be rolled with opposing sides, and the second stand is disposed downstream of the first stand, and the second stand is located downstream of the first stand. The forcible guide means comprises a pair of cylindrical rolling rolls arranged parallel to a pair of male and female rolling rolls, and the roll rolling surface for rolling the linear body is parallel to the rolling roll axis; A linear object rolling machine comprising a guide member that vertically guides a longitudinal portion of the linear object entering a stand. 4. The linear body rolling mill according to claim 3, wherein the pair of cylindrical rolling rolls includes a carrier into which the linear body engages.