JP2008290127A - Straightening machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a straightening machine with which the drop of working efficiency caused by changing a guide is suppressed. <P>SOLUTION: This straightening machine is provided with a first roll 11, a second roll 12 which is arranged opposingly to the first roll 11 through a rod-like or a tubular material D to be straightened and the rotating shaft E2 of which is crossed with the rotating shaft E1 of the first roll 11 at a prescribed angle in the opposite-direction view and a guide 13 which is arranged between the first roll 11 and the second roll 12 and in the region on one side in the direction orthogonally crossed with the opposite direction to the intersection of the rotating shaft E1 of the first roll 11 and the rotating shaft E2 of the second roll 12 in the opposite direction view. The distance L between the outer surface of the first roll 11 and the outer surface of the second roll 12 at the intersection G is set shorter than the outside diameter Dw of the material D to be straightened which is passed through the region between the intersection G and the guide 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a straightening machine that corrects bending of a rod-like or tubular straightening material.

  Examples of the straightening machine include a straightening machine disclosed in Patent Documents 1 and 2 that corrects the bending of a material to be straightened with a pair of rolls. FIG. 8 is a diagram showing an arrangement relationship between a pair of rolls provided in such a straightening machine. As shown in FIG. 8, one roll 101 constituting a pair of rolls is disposed opposite to the other roll 102, and the rotation shaft 101 </ b> A is at a predetermined angle with the rotation shaft 102 </ b> A of the other roll 102 as viewed in the opposite direction. It is arranged to intersect. Such a correction machine presses the material D to be passed between the pair of rolls 101 and 102 by the pair of rolls 101 and 102, and repeatedly applies plastic deformation to the material D to be corrected. Correct the bending of material D.

  In addition to the pair of rolls 101 and 102, the aforementioned straightening machine is provided with a guide. FIG. 9 is a diagram showing an arrangement relationship between the pair of rolls 101 and 102 and the guide 103 in the AA cross section of FIG. As shown in FIG. 9, the guide 103 is disposed in regions on both sides in a direction orthogonal to the opposing direction of the pair of rolls 101 and 102. This guide 103 is used to prevent the material to be corrected D from being pushed out between the pair of rolls 101 and 102 when plastic deformation is applied to the material D to be corrected passing between the pair of rolls 101 and 102. Is arranged. By arranging the guide 103 in this way, even if a force that pushes out the correction material D from between the pair of rolls 101 and 102 is applied, the correction material D collides with the guide 103, and thus the correction target The material D is prevented from being pushed out between the pair of rolls 101 and 102.

Since such a guide 103 is worn every time it collides with the material D to be corrected, it is replaced as the wear progresses.
Japanese Patent Application Laid-Open No. 7-265953 JP 2006-15375 A

  However, when the guide 103 is replaced, it is necessary to stop the straightening machine and interrupt the correction of the material to be corrected. Therefore, the replacement work of the guide 103 decreases the work efficiency of the straightening machine.

  This invention makes it a subject to provide the straightening machine by which the fall of the working efficiency by replacement | exchange of a guide was suppressed.

  In order to solve the above-described problems, the present invention provides a first roll and a first roll, and the first roll is opposed to the first roll via a rod-like or tubular correction material, and the opposite A second roll whose rotational axis intersects the rotational axis of the first roll at a predetermined angle in a direction view, and between the first roll and the second roll, and the first roll in the opposite direction view. A guide disposed in a region on one side in a direction orthogonal to the facing direction with respect to an intersection of the rotation axis of the second roll and the rotation axis of the second roll, and the outer surface of the first roll and the second roll The distance at the intersection with the outer surface is set shorter than the outer diameter of the material to be corrected that passes through the region between the intersection and the guide, and passes through the region by the first roll and the second roll. Pressing the material to be corrected By giving repeated plastic deformation Tadashizai provides straightener, characterized in that to correct the bending of the object to be corrected material.

  The correction machine according to the present invention corrects the bending of the material to be corrected by pressing the material to be corrected that passes through the region between the intersection and the guide by the first roll and the second roll. The intersection is a point where the rotation axis of the first roll and the rotation axis of the second roll intersect each other when viewed in the opposing direction of the first roll and the second roll. On the other hand, the guide is disposed in a region on one side in a direction orthogonal to the facing direction of the first roll and the second roll with respect to the intersection as viewed in the facing direction of the first roll and the second roll. That is, the guide is located in one of the directions orthogonal to the opposing direction of the first roll and the second roll in the region through which the material to be corrected passes, and the intersection is located in the other. Therefore, when the material to be corrected passing through the region is pressed by the first roll and the second roll, a force for pushing the material to be corrected acts in one of the directions orthogonal to the opposing direction of the first roll and the second roll. Even so, since the material to be corrected collides with the guide, the guide prevents the material to be corrected from being pushed out in one direction orthogonal to the opposing direction of the first roll and the second roll. The distance at the intersection of the outer surface of the first roll and the outer surface of the second roll is set to be narrower than the outer diameter of the material to be corrected. Therefore, the to-be-corrected material passing through the region passes between the first roll and the second roll at the intersection, and the region opposite to the region where the guide is arranged with respect to the intersection (the first with respect to the intersection). The first roll and the second roll prevent it from being pushed out to the other side of the direction perpendicular to the opposing direction of the roll and the second roll. Thus, the straightening machine according to the present invention is not a guide that the material to be corrected is pushed out to the region on the other side orthogonal to the opposing direction of the first roll and the second roll, and the first roll and the second roll Is prevented by. Therefore, in the straightening machine according to the present invention, it is not necessary to dispose guides in the respective regions on both sides orthogonal to the opposing direction of the first roll and the second roll as in the prior art. Therefore, in the straightening machine according to the present invention, since the guide is replaced only by the guide disposed in the one side region, the labor for replacing the guide is small, and the reduction in work efficiency due to the replacement of the guide is suppressed.

Preferably, as described in claim 2 of the claims, the outer diameter at the intersection of the first roll is Drc1, the outer diameter of the material to be corrected is Dw, and the intersection at a position where the material to be corrected passes is The distance in the direction perpendicular to the facing direction is T, the crossing angle between the rotation axis of the first roll and the rotation axis of the second roll is 2A, and the plastic deformation is applied to the material to be corrected. The outer diameter Dr1 of the first roll at a position separated from the intersection by a distance X in the direction of the rotation axis of the first roll is R When all of (1), (2), (3), (4) and (5) are satisfied and the outer diameter at the intersection of the second roll is Drc2, the rotation of the second roll from the intersection Axial distance X Outer diameter Dr2 of the second roll in position, the following equation (1) ', (2)', (3), is configured to have satisfied all (4) and (5).

  According to such a preferable configuration, a plastic deformation having a radius of curvature of R is given to the material to be corrected that passes through a position separated by a distance T in the direction orthogonal to the opposing direction of the first roll and the second roll from the intersection, The bending of the material to be corrected can be corrected. That is, it is possible to correct the bending of the material to be corrected by applying plastic deformation with a radius of curvature R to the material to be corrected that passes through the region between the intersection and the guide.

  ADVANTAGE OF THE INVENTION According to this invention, the straightening machine by which the fall of the working efficiency by replacement | exchange of a guide was suppressed can be provided.

  FIG. 1 is a plan view of a straightening machine 1 according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line BB in FIG. As shown in FIGS. 1 and 2, the straightening machine 1 includes a first roll 11, a second roll 12, and a guide 13.

  As shown in FIG. 1, the first roll 11 has the smallest outer diameter at the central portion in the direction of the rotation axis E1, and the hourglass shape in which the outer diameter increases toward the both ends from the central portion in the direction of the rotation axis E1. It is said that.

  As shown in FIG. 1, the second roll 12 is disposed to face the first roll 11 via a rod-like or tubular correction material D, and the rotation axis E2 of the second roll 12 is the rotation axis of the first roll 11 when viewed in the opposite direction. Crosses E1 at a predetermined angle 2A. In the present embodiment, the opposing direction of the first roll 11 and the second roll 12 is the vertical direction, and the second roll 12 is disposed below the first roll 11. Thus, since the opposing direction of the 1st roll 11 and the 2nd roll 12 is an up-down direction, in FIG. 1, as for the 1st roll 11 and the 2nd roll 12, each rotating shaft E1, E2 is a predetermined angle. Cross at 2A. Furthermore, as shown in FIG. 2, the distance L at the intersection G between the outer surface of the first roll 11 and the outer surface of the second roll 12 is set to be shorter than the outer diameter Dw of the material D to be corrected. The intersection G is a point where the rotation axis E1 of the first roll 11 and the rotation axis E2 of the second roll 12 intersect when the first roll 11 and the second roll 12 are viewed in the opposite direction. Further, the second roll 12 has a barrel shape in which the outer diameter is the thickest at the central portion in the direction of the rotation axis E2, and the outer diameter becomes narrower from the central portion in the direction of the rotation axis E2 toward both ends.

  As shown in FIG. 1 and FIG. 2, the guide 13 is between the first roll 11 and the second roll 12, and the first roll 11 rotates in the opposite direction of the first roll 11 and the second roll 12. It arrange | positions in the area | region of the one side of the direction orthogonal to the said opposing direction with respect to the intersection G of the axis | shaft E1 and the rotating shaft E2 of the 2nd roll 12. FIG. Between the first roll 11 and the second roll 12, for example, in the facing direction of the first roll 11 and the second roll 12 (W direction in FIG. 2), the position of the rotation axis E1 of the first roll 11 It can be between the rotation axis E <b> 2 of the second roll 12. Further, the direction orthogonal to the facing direction is a direction (arrow U direction in FIG. 1) (hereinafter referred to as a conveyance orthogonal direction) orthogonal to the conveyance direction (the arrow H direction in FIG. 1) of the material D to be corrected. . This transport direction is orthogonal to the opposing direction of the first roll 11 and the second roll 12 and has a predetermined angle 2A with respect to both the rotation axis E1 of the first roll 11 and the rotation axis E2 of the second roll 12. This is a direction that forms an angle A divided into two equal parts. In each figure, the arrow W indicates the facing direction of the first roll 11 and the second roll 12, the arrow H indicates the transport direction of the material D to be corrected, and the arrow U indicates the transport orthogonal direction.

In the straightening machine 1 described above, the first roll 11 and the second roll 12 press the correction material D that passes through the region between the intersection G and the guide 13, and plastic deformation of the correction material D is performed. Is repeatedly corrected to correct the bending of the material D to be corrected. As shown in FIG.
When passing through the region, the material D to be corrected has the central axis D1 rotated by the rotation axis E1 of the first roll 11 and the rotation of the second roll 12 when viewed in the opposite direction of the first roll 11 and the second roll 12. Passing through a position separated by a distance T (T ≠ 0) on one side in the conveyance orthogonal direction with respect to the intersection G with an angle A that is a half of the predetermined angle 2A with respect to any axis E2. Then, it is conveyed in the direction of arrow H. In addition, this conveyance is realizable by moving the to-be-corrected material D by driving and rotating the 1st roll 11 and the 2nd roll 12, for example. Realization of the conveyance of the material D to be corrected is not limited to the drive rotation of the first roll 11 and the second roll 12, and for example, the other rolls other than the first roll 11 and the second roll 12 are driven to rotate. May be realized by conveying the material D to be corrected.

  Further, when passing through the region, the material D to be corrected is pressed by the first roll 11 and the second roll 12, so that it is on the outer surface of the first roll 11 and the second roll 12 in the vicinity of the intersection G. Plastically deforms along. 3 is a cross-sectional view taken along the line CC of FIG. As shown in FIG. 3, when the material D to be corrected is plastically deformed along the outer surfaces of the first roll 11 and the second roll 12, the center axis D1 of the material D to be corrected is In the opposite direction view of the first roll 11 and the second roll 12, a straight line parallel to the conveyance direction of the material D to be corrected, and an arc shape having a curvature radius R in the CC cross section shown in FIG. Become. The central axis D1 having an arc shape having a curvature radius R due to this deformation has an intersection portion D2 (see FIGS. 1 and 3) whose position in the direction of the central axis D1 coincides with the intersection G. And the second roll 12 in the opposite direction to the first roll 11 side (upward in FIG. 3), the second roll 12 side (see FIG. 3) as the distance from the intersection D2 in the direction of the central axis D1 of the material D to be corrected. In FIG. 3, the shape is located on the lower side.

  While the material to be corrected D passes through the region, the material D is pressed by the first roll 11 and the second roll 12, and the plastic deformation described above is continuously repeated. Further, when the material D to be corrected passes through the region, the material D rotates around the central axis D1. While the material D to be corrected is continuously repeatedly subjected to plastic deformation, it rotates around its central axis D1 and passes through the region between the intersection G and the guide 13, whereby the first roll 11 and the second roll 12, the material D to be corrected is pressed from various angles, and plastic deformation is repeatedly given from various angles. The bending of the material D to be corrected is corrected by repeatedly applying such plastic deformation from various angles.

  As described above, the region through which the material to be corrected D passes is a region between the intersection G and the guide 13. In this region, the guide 13 is located in one of the conveyance orthogonal directions, and the intersection G is located in the other. Therefore, even if the force to push the straightening material D to one of the conveyance orthogonal directions is applied by pressing the straightening material D passing through the region against the first roll 11 and the second roll 12, the straightening is performed. Since the material D collides with the guide 13, the guide 13 prevents the material D to be corrected from being extruded in one of the conveyance orthogonal directions. The distance L at the intersection G between the outer surface of the first roll 11 and the outer surface of the second roll 12 is set to be narrower than the outer diameter Dw of the material D to be corrected. Therefore, the to-be-corrected material D that passes through the region passes between the first roll 11 and the second roll 12 at the intersection G, and the region opposite the region where the guide 13 is disposed with respect to the intersection G (intersection). On the other hand, the first roll 11 and the second roll 12 prevent the first roll 11 and the second roll 12 from being pushed out. Thus, the straightening machine 1 is not the guide 13 but the first roll 11 and the second roll when the straightened material D is pushed out to the other side of the first roll 11 and the second roll 12 opposite to each other. This is prevented by the roll 12. Therefore, in the straightening machine 1, it is not necessary to arrange the guides 13 in the respective regions on both sides orthogonal to the opposing direction of the first roll 11 and the second roll 12 as in the prior art. Therefore, in the straightening machine 1, the guide 13 is replaced only by the guide 13 disposed in the one side region, so that the labor required for the replacement of the guide 13 is small, and a reduction in work efficiency due to the replacement of the guide 13 is suppressed. .

  As shown in FIG. 2, a straight line connecting the rotation axis E1 of the first roll 11 and the rotation axis E2 of the second roll in the BB cross section and the rotation axis of the first roll 11 in the BB cross section. An angle θ1 formed by a straight line connecting E1 and the rotation axis D1 of the material D to be corrected, and a straight line connecting the rotation axis E1 of the first roll 11 and the rotation axis E2 of the second roll in the BB cross section, The angle θ2 formed by the straight line connecting the rotation axis E2 of the second roll 12 and the rotation axis D1 of the material D to be corrected in the BB cross section is preferably 5 ° to 20 °. The reason why the angle is set to 5 ° or more is to reliably prevent the material D to pass through between the first roll 11 and the second roll 12 at the intersection G. Further, the angle of 20 ° or less makes it easy to press the material D to be corrected by the first roll 11 and the second roll 12 with a force necessary for plastic deformation of the material D to be corrected. Because.

Next, the outer diameter Dr1 of the first roll 11 satisfies all of the following expressions (1), (2), (3), (4) and (5), and the outer diameter Dr2 of the second roll 12 is When all of (1) ′, (2) ′, (3), (4) and (5) are satisfied, the distance T from the intersection G in the direction orthogonal to the opposing direction of the first roll 11 and the second roll 12 It will be described that plastic deformation with a radius of curvature of R can be given to the material D to be corrected passing through a position that is far away.

  First, the outer diameter Dr1 of the first roll 11 will be described. FIG. 4 is a plan view of the first roll 11 and the material D to be corrected. FIG. 5 is a diagram showing the positional relationship between the first roll 11 and the material D to be corrected. 5 shows a rotation axis E1 of the first roll 11 in the cross section included in the B1-B1 cross section shown in FIG. 4, and a rotation axis E1 of the first roll 11 in the cross section included in the B2-B2 cross section shown in FIG. And the cross-sectional portion included in the B1-B1 cross section and the cross-sectional portion included in the B2-B2 cross section are shown so as to overlap each other. The B1-B1 cross section is a cross section generated by cutting the first roll 11 and the material D to be corrected in a direction perpendicular to the rotation axis E1 of the first roll 11 so as to include the intersection G. The B2-B2 cross section has the first roll 11 and the material to be corrected in a direction perpendicular to the rotation axis E1 of the first roll 11 at a position X away from the intersection G in one direction of the rotation axis E1 direction of the first roll 11. It is a cross section generated by cutting D. The one-direction side of the first roll 11 in the rotation axis E1 direction refers to the rotation axis E1 of the first roll 11 and the material D to be corrected when viewed from the intersection G in the rotation axis E1 direction of the first roll 11. The direction on the side where the central axis D1 intersects, that is, the direction of the arrow Y shown in FIG. In FIG. 5, the cross-sectional portion included in the B1-B1 cross section is indicated by a broken line, and the cross-sectional portion included in the B2-B2 cross section is indicated by a solid line.

  As shown in FIG. 5, in the B1-B1 cross section, the central axis D1 of the material D to be corrected is opposed to the first roll 11 and the second roll 12 with respect to the rotation axis E1 of the first roll 11 (FIG. 5). In the direction of arrow W), and in the direction of arrow V (hereinafter referred to as the direction of rotation axis orthogonal) orthogonal to the rotation axis E1 of the first roll 11 is separated by a distance T / cosA. As shown in FIG. 4, the position through which the material D passes is separated from the intersection G by a distance T in the conveyance orthogonal direction (the direction of arrow U in FIG. 4), and the first roll 11 and the first roll This is because the center axis D <b> 1 of the material D to be corrected forms an angle A with the rotation axis E <b> 1 of the first roll 11 when the two rolls 12 face each other. In each figure, the arrow V indicates the direction perpendicular to the rotation axis.

距離Ｐが式（２）を満足するのは、図５に示すように、Ｂ１−Ｂ１断面における被矯正材Ｄの中心軸Ｄ１は、前述のように、第１ロール１１の回転軸Ｅ１に対して、回転軸直交方向に距離Ｔ／ｃｏｓＡだけ離れており、且つ、第１ロール１１の回転軸Ｅ１に対して、距離（Ｄｒｃ１＋Ｄｗ）／２だけ離れているからである。尚、Ｄｒｃ１は、第１ロール１１の交差点Ｇにおける外径である。被矯正材Ｄの中心軸Ｄ１が第１ロール１１の回転軸Ｅ１に対して、距離（Ｄｒｃ１＋Ｄｗ）／２だけ離れているのは、被矯正材Ｄは、第１ロール１１及び第２ロール１２に押圧されて第１ロール１１の外面に沿うためである。尚、Ｂ１−Ｂ１断面において、被矯正材Ｄは楕円形となるが、ここでは円として考えている。 On the other hand, as shown in FIG. 5, in the B1-B1 cross section, the center axis D1 of the material D to be corrected is in the opposing direction of the first roll 11 and the second roll 12 with respect to the rotation axis E1 of the first roll 11. They are separated by a distance P. This distance P satisfies the following expression (2).

As shown in FIG. 5, the distance P satisfies the formula (2) because the center axis D1 of the material D to be corrected in the B1-B1 cross section is relative to the rotation axis E1 of the first roll 11 as described above. This is because it is separated by a distance T / cosA in the direction perpendicular to the rotation axis, and is separated from the rotation axis E1 of the first roll 11 by a distance (Drc1 + Dw) / 2. Drc1 is the outer diameter at the intersection G of the first roll 11. The center axis D1 of the material D to be corrected is separated from the rotation axis E1 of the first roll 11 by a distance (Drc1 + Dw) / 2 because the material D to be corrected is separated from the first roll 11 and the second roll 12. This is because it is pressed along the outer surface of the first roll 11. In addition, although the to-be-corrected material D becomes elliptical in the B1-B1 cross section, it is considered as a circle here.

図３に示すように、撓みδ１は、被矯正材Ｄの中心軸Ｄの交差点部分Ｄ２と、被矯正材Ｄの中心軸Ｄ１のＢ１−Ｂ１断面に含まれるＢ１−Ｂ１断面部分Ｄ３（図４参照）との第１ロール１１と第２ロール１２との対向方向の距離である。撓みδ１は、次式（４）を満たすものである。

交差点部分Ｄ２に対してＢ１−Ｂ１断面部分Ｄ３が被矯正材Ｄの搬送方向（図３の矢印Ｈ方向）に距離ＴｔａｎＡ離れているのは、図４に示すように、被矯正材Ｄが通過する位置は、交差点Ｇに対して搬送直交方向（図４の矢印Ｕ方向）に距離Ｔだけ離れ、且つ、第１ロール１１及び第２ロール１２の対向方向視において、被矯正材Ｄの中心軸Ｄ１が第１ロール１１の回転軸Ｅ１に対して角度Ａを成しているためである。 On the other hand, as shown in FIG. 5, in the B2-B2 cross section, the portion of the central axis D1 of the material D to be corrected that appears in the cross section (hereinafter referred to as B2-B2 cross section D4 (see FIGS. 3 and 4)) The first roll 11 is separated from the rotation axis E1 by a distance P + δ in the facing direction of the first roll 11 and the second roll 12. As shown in FIG. 3, the distance δ satisfies the following expression (3).

As shown in FIG. 3, the deflection δ <b> 1 is an intersection D <b> 2 of the center axis D of the material D to be corrected and a B <b> 1-B <b> 1 cross-section portion D <b> 3 included in the B1-B1 cross section of the center axis D <b> 1 of the material D to be corrected. The distance between the first roll 11 and the second roll 12 in the opposite direction. The deflection δ1 satisfies the following expression (4).

The B1-B1 cross-section D3 is separated from the intersection D2 by a distance TtanA in the conveying direction of the material D (in the direction of the arrow H in FIG. 3) because the material D passes as shown in FIG. The position to be moved is a distance T in the conveyance orthogonal direction (the direction of arrow U in FIG. 4) with respect to the intersection G, and the central axis of the material D to be corrected when viewed in the opposite direction of the first roll 11 and the second roll 12. This is because D1 forms an angle A with the rotation axis E1 of the first roll 11.

交差点部分Ｄ２に対してＢ２−Ｂ２断面部分Ｄ４が被矯正材Ｄの搬送方向に距離Ｘ／ｃｏｓＡ−ＴｔａｎＡだけ離れているのは、図４に示すように、Ｂ１−Ｂ１断面とＢ２−Ｂ２断面との被矯正材Ｄの搬送方向の距離はＸ／ｃｏｓＡ（第１ロール１１の回転軸Ｅ１方向の距離はＸ）であり、交差点部分Ｄ２とＢ１−Ｂ１断面部分Ｄ３との被矯正材Ｄの搬送方向の距離がＴｔａｎＡであるためである。 Further, as shown in FIG. 3, the deflection δ2 is a distance in the facing direction between the first roll 11 and the second roll 12 between the intersection portion D2 and the B2-B2 cross-section portion D4. The deflection δ2 satisfies the following expression (5).

The B2-B2 cross section D4 is separated from the intersection D2 by the distance X / cosA-TtanA in the conveying direction of the material D to be corrected, as shown in FIG. The distance in the conveyance direction of the material D to be corrected is X / cosA (the distance in the direction of the rotation axis E1 of the first roll 11 is X), and the distance D of the material D to be corrected between the intersection portion D2 and the B1-B1 cross-section portion D3. This is because the distance in the transport direction is TtanA.

  Therefore, in the B2-B2 cross section, the central axis D1 of the material D to be corrected is located on the second roll 12 side by a distance δ with respect to the position in the B1-B1 cross section. That is, in the B2-B2 cross section, the distance in the opposing direction of the first roll 11 and the second roll 12 between the center axis D1 of the material D to be corrected and the rotation axis E1 of the first roll 11 is the distance in the B1-B1 cross section. Is greater than the distance δ. Therefore, in the B2-B2 cross section, the center axis D1 of the material D to be corrected is separated from the rotation axis E1 of the first roll 11 by a distance P + δ in the facing direction of the first roll 11 and the second roll 12.

  Further, as shown in FIG. 5, in the cross section B <b> 2-B <b> 2, the center axis D <b> 1 of the material D to be corrected is in the direction perpendicular to the rotation axis (the direction of arrow V in FIG. 5) with respect to the rotation axis E <b> 1 of the first roll 11. It is separated by a distance (XtanA-T / cosA). As shown in FIG. 4, the center axis D1 of the material D to be corrected forms an angle A with the rotation axis E1 of the first roll 11 and is separated by a distance (XtanA−T / cosA). The distance in the rotation axis E1 direction of the first roll 11 between the -B1 cross section and the B2-B2 cross section is X, and as described above, in the B1-B1 cross section, the central axis D1 of the material D to be corrected is the first This is because a distance T / cosA is away from the B2-B2 cross section in the direction orthogonal to the rotation axis with respect to the rotation axis E1 of one roll 11.

  In the B2-B2 cross section, the distance of the center axis D1 of the material D to be corrected with respect to the rotation axis E1 of the first roll 11 is (Dr1 + Dw) / 2. The center axis D1 of the material D to be corrected is separated from the rotation axis E1 of the first roll 11 by a distance (Dr1 + Dw) / 2 because the material D to be pressed against the first roll 11 and the second roll 12 This is for the purpose of being along the outer surface of the first roll 11. In addition, although the to-be-corrected material D becomes an ellipse also in a B2-B2 cross section, it is considered as a circle here.

式（６）をＤｒ１について解くと、式（１）を導くことができる。 From the above, as shown in FIG. 5, the central axis D1 of the material D to be corrected in the B2-B2 cross section is opposed to the first roll 11 and the second roll 12 with respect to the rotation axis E1 of the first roll 11. It is separated by a distance P + δ in the direction, and is separated by a distance (XtanA−T / cosA) in the direction perpendicular to the rotation axis. As described above, the material D to be corrected having the radius of curvature R is along the outer surface of the first roll 11 even at a position separated from the intersection G by one distance X in the direction of the rotation axis E1 of the first roll 11. In order to achieve this, it is necessary to satisfy the following equation (6).

When equation (6) is solved for Dr1, equation (1) can be derived.

  Next, the outer diameter Dr2 of the second roll 12 will be described. FIG. 6 is a plan view of the second roll 12 and the material D to be corrected. FIG. 7 is a diagram showing the positional relationship between the second roll 12 and the material D to be corrected. 7 shows a rotation axis E2 of the second roll 12 in the cross section included in the B3-B3 cross section shown in FIG. 6, and a rotation axis E2 of the second roll 12 in the cross section included in the B4-B4 cross section shown in FIG. And the cross-sectional portion included in the B3-B3 cross section and the cross-sectional portion included in the B4-B4 cross section are shown so as to overlap each other. The B3-B3 cross section is a cross section generated by cutting the second roll 12 and the material D to be corrected in a direction orthogonal to the rotation axis E2 of the second roll 12 so as to include the intersection G. The B4-B4 cross section has the second roll 12 and the object to be corrected in a direction perpendicular to the rotation axis E2 of the second roll 12 at a position separated from the intersection G by one distance X in the direction of the rotation axis E2 of the second roll 12. It is a cross section generated by cutting the material D. The one direction side of the second roll 12 in the rotation axis E2 direction refers to the rotation axis E2 of the second roll 12 and the material D to be corrected when viewed from the intersection G in the rotation axis E2 direction of the second roll 12. The direction on the side where the central axis D1 does not intersect, that is, the direction of the arrow Y ′ shown in FIG. Moreover, in FIG. 7, the cross-sectional part contained in a B3-B3 cross section is shown with the broken line, and the cross-sectional part contained in the B4-B4 cross section is shown with the continuous line.

  As shown in FIG. 7, in the B3-B3 cross section, the central axis D1 of the material D to be corrected is orthogonal to the opposing direction of the first roll 11 and the second roll 12 with respect to the rotation axis E2 of the second roll 12. In addition, they are separated by a distance T / cosA in the direction of the arrow V ′ perpendicular to the rotation axis E2 of the second roll 12 (hereinafter referred to as the rotation axis orthogonal direction). As shown in FIG. 6, the position where the material D passes is separated from the intersection G by a distance T in the conveyance orthogonal direction (the direction of the arrow U in FIG. 6), and the first roll 11 and the first roll This is because the center axis D <b> 1 of the material D to be corrected forms an angle A with respect to the rotation axis E <b> 2 of the second roll 12 in the opposite direction of the two rolls 12. In each figure, an arrow V ′ indicates a direction orthogonal to the rotation axis.

距離Ｐ’が式（２）’を満足するのは、図７に示すように、Ｂ３−Ｂ３断面における被矯正材Ｄの中心軸Ｄ１は、前述のように、第２ロール１２の回転軸Ｅ２に対して、回転軸直交方向に距離Ｔ／ｃｏｓＡだけ離れており、且つ、第２ロール１２の回転軸Ｅ２に対して、距離（Ｄｒｃ２＋Ｄｗ）／２だけ離れているからである。尚、Ｄｒｃ２は、第２ロール１２の交差点Ｇにおける外径である。被矯正材Ｄの中心軸Ｄ１が第２ロール１２の回転軸Ｅ２に対して、距離（Ｄｒｃ２＋Ｄｗ）／２だけ離れているのは、被矯正材Ｄは、第１ロール１１及び第２ロール１２に押圧されて第２ロール１２の外面に沿うためである。尚、Ｂ３−Ｂ３断面において、被矯正材Ｄは楕円形となるが、ここでは円として考えている。 On the other hand, as shown in FIG. 7, in the B3-B3 cross section, the central axis D1 of the material D to be corrected is opposed to the first roll 11 and the second roll 12 with respect to the rotation axis E2 of the second roll 12 ( It is separated by a distance P ′ in the direction of arrow W in FIG. This distance P ′ satisfies the following expression (2) ′.

The distance P ′ satisfies the expression (2) ′ as shown in FIG. 7 because the center axis D1 of the material D to be corrected in the B3-B3 cross section is the rotation axis E2 of the second roll 12 as described above. On the other hand, it is separated from the rotation axis E2 of the second roll 12 by a distance (Drc2 + Dw) / 2 from the rotation axis orthogonal direction by a distance T / cosA. Note that Drc2 is the outer diameter at the intersection G of the second roll 12. The center axis D1 of the correction material D is separated from the rotation axis E2 of the second roll 12 by a distance (Drc2 + Dw) / 2 because the correction material D is separated from the first roll 11 and the second roll 12. This is because it is pressed along the outer surface of the second roll 12. In addition, although the to-be-corrected material D becomes elliptical in the B3-B3 cross section, it is considered as a circle here.

  On the other hand, as shown in FIG. 7, in the B4-B4 cross section, the portion of the central axis D1 of the material D to be corrected that appears in the cross section (hereinafter referred to as B4-B4 cross section D6 (see FIG. 6)) is the second roll. 12 distances P′−δ in the opposing direction of the first roll 11 and the second roll 12. Here, the distance δ is the first roll 11 and the second roll 11 between the B3-B3 cross section D5 (see FIG. 6) and the B4-B4 cross section D6 included in the B3-B3 cross section of the central axis D1 of the material D to be corrected. This is the distance in the opposite direction of the roll 12. The distance P′−δ becomes the rotation axis of the center axis D1 of the material D to be corrected and the rotation axis of the second roll 12 when the distance between the center axis D1 of the material D to be corrected and the rotation axis E1 of the first roll 11 increases. This is because the distance from E1 becomes small. Here, the distance δ can be calculated using the above-described equations (3), (4), and (5).

  Further, as shown in FIG. 7, in the B4-B4 cross section, the center axis D1 of the material D to be corrected is separated from the rotation axis E2 of the second roll 12 by a distance (XtanA + T / cosA) in the direction perpendicular to the rotation axis. ing. As shown in FIG. 6, the center axis D1 of the material D to be corrected forms an angle A with the rotation axis E2 of the second roll 12, and is separated by a distance (XtanA + T / cosA). The distance between the cross section and the B4-B4 cross section in the direction of the rotation axis E2 of the second roll 12 is X, and as described above, in the B3-B3 cross section, the central axis D1 of the material D to be corrected is the first roll. This is because 12 rotation axes E2 are separated by a distance T / cosA in the same direction as the B4-B4 cross section in the direction orthogonal to the rotation axis (the direction of arrow V ′ in FIG. 6).

  In the B4-B4 cross section, the distance of the central axis D1 of the material D to be corrected with respect to the rotation axis E2 of the second roll 12 is a distance (Dr2 + Dw) / 2. The center axis D1 of the material D to be corrected is separated from the rotation axis E2 of the second roll 12 by a distance (Dr2 + Dw) / 2 because the material D to be corrected is separated from the first roll 11 and the second roll 12. This is because it is pressed along the outer surface of the second roll 12. In addition, although the to-be-corrected material D becomes elliptical also in the B4-B4 cross section, it is considered as a circle here.

式（６）’をＤｒ２について解くと式（１）’を導くことができる。 From the above, as shown in FIG. 7, the center axis D1 of the material D to be corrected in the B4-B4 cross section is opposed to the first roll 11 and the second roll 12 with respect to the rotation axis E2 of the second roll 12. It is separated by a distance P′−δ in the direction, and is separated by a distance (XtanA + T / cosA) in the direction perpendicular to the rotation axis. In this way, the material D to be corrected having the curvature radius R is along the outer surface of the second roll 12 even at a position X away from the intersection G in one direction of the rotation axis E2 direction of the second roll 12. Therefore, it is necessary to satisfy the following expression (6) ′.

When equation (6) ′ is solved for Dr2, equation (1) ′ can be derived.

  As described above, the outer diameter Dr1 of the first roll 11 satisfies all of the expressions (1), (2), (3), (4) and (5), and the outer diameter Dr2 of the second roll 12 is equal to the expression When all of (1) ′, (2) ′, (3), (4) and (5) are satisfied, the correction material D can be placed along the outer surfaces of the first roll 11 and the second roll 12. Therefore, plastic deformation with a radius of curvature of R can be applied to the material D to be corrected passing through a position that is separated from the intersection G by a distance T in a direction orthogonal to the opposing direction of the first roll 11 and the second roll 12. .

FIG. 1 is a plan view of a straightening machine according to the present embodiment. 2 is a cross-sectional view taken along the line BB in FIG. 3 is a cross-sectional view taken along the line CC of FIG. 1 of the material to be corrected. FIG. 4 is a plan view of the first roll and the material to be corrected. FIG. 5 is a diagram showing the positional relationship between the first roll and the material to be corrected. FIG. 6 is a plan view of the second roll and the material to be corrected. FIG. 7 is a diagram showing the positional relationship between the second roll and the material to be corrected. FIG. 8 is a diagram showing the arrangement relationship of a pair of rolls in the prior art. FIG. 9 is a diagram showing an arrangement relationship between a pair of rolls and a guide in the AA cross section of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Straightening machine, 11 ... 1st roll, 12 ... 2nd roll, 13 ... Guide, D ... Material to be corrected

Claims (2)

A first roll;
A second roll disposed opposite to the first roll via a rod-like or tubular correction material, the rotation axis of which intersects the rotation axis of the first roll at a predetermined angle when viewed in the opposite direction;
Between the first roll and the second roll, in a direction orthogonal to the facing direction with respect to an intersection of the rotating shaft of the first roll and the rotating shaft of the second roll in the facing direction. With a guide arranged in one area,
The distance at the intersection between the outer surface of the first roll and the outer surface of the second roll is set to be shorter than the outer diameter of the material to be corrected that passes through a region between the intersection and the guide,
The bending of the correction material is corrected by pressing the correction material passing through the region by the first roll and the second roll, and repeatedly applying plastic deformation to the correction material. Straightening machine. The outer diameter of the first roll at the intersection is Drc1, the outer diameter of the material to be corrected is Dw, the distance in the direction perpendicular to the intersection with respect to the intersection at the position where the material to be corrected passes is T, the first The crossing angle of the rotation axis of the roll and the rotation axis of the second roll when viewed in the opposite direction is 2A, and the curvature radius of the bending of the material to be corrected that is generated by applying the plastic deformation to the material to be corrected is R. Then, the outer diameter Dr1 of the first roll at a position away from the intersection in the rotation axis direction of the first roll by a distance X is expressed by the following equations (1), (2), (3), (4) and Satisfy all of (5)
When the outer diameter of the second roll at the intersection is Drc2, the outer diameter Dr2 of the second roll at a position away from the intersection by a distance X in the rotation axis direction of the second roll is expressed by the following formula (1). The straightening machine according to claim 1, wherein all of ', (2)', (3), (4) and (5) are satisfied.

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