JP2011110569A - Straightening device and straightening method for coil-shaped wire rod - Google Patents

Abstract

The present invention provides a straightening device and a straightening method capable of improving the accuracy of linearity when straightening a coiled wire rod, even with a simple and inexpensive device configuration.
SOLUTION: A turntable, a wire supply means for drawing a coil-shaped wire M from the turntable, a staggered arrangement in two rows in a correction plane SH, a free rotation, and a wire along an outer peripheral surface. A coiled wire rod straightening device comprising a plurality of straightening rollers 31, 32 having a groove to enter and alternately pressing the wire rod M from both side surfaces, in front of the leading straightening roller 31 near the turntable The twist correcting roller 4 is arranged to be displaced from the correction plane SH (displacement amount ΔH) and is free to rotate and has a groove into which the wire M is engaged along the outer peripheral surface, and presses the wire from the side. With
Correction forces FI and FJ in a direction crossing the correction plane SH are applied to the wire M engaged in the grooves of the correction roller 31 and the twist correction roller 4.
[Selection] Figure 3

Description

  The present invention relates to a straightening device and a straightening method for straightening a wire wound in a coil shape, and more particularly to an improvement in linearity in a straightening device and a straightening method using a plurality of straightening rollers.

  In a forging machine that forges a workpiece to produce a part with a predetermined shape, a wire straightening device and a cutting device are attached to the preceding stage, and a long wire is generally cut into a predetermined length of workpiece and supplied in sequence. It is. Since wire rods such as steel wires are usually received in a coiled state, the straightening device has the role of straightening the wire rod with spiral windings into a straight line and supplying it to the cutting device. Yes. In recent years, demands for improving the dimensional accuracy of parts have become severe, and as a precondition, improving the accuracy of linearity of wires and workpieces has become an important issue. In particular, when a highly accurate part is manufactured, a linear wire may be used. However, since the wire length is limited, the wire replacement work becomes frequent, the yield of the wire is poor, and the cost increases. Therefore, there is a need for a straightening device that can straighten even a coiled wire with high accuracy.

  For this type of straightening device, a device of a type in which straightening rollers are alternately arranged in two rows to alternately press both side surfaces of the wire is used. Furthermore, in order to further improve the accuracy of linearity, an apparatus that uses two groups of correction rollers in series and performs correction separately from the horizontal direction and the vertical direction has been put into practical use. Nevertheless, sufficient linearity may not be obtained, and new techniques have been proposed in Patent Documents 1 and 2.

  The “bending correction device for wire rod” disclosed in Patent Document 1 is provided with a rotation mechanism that arranges the correction roller group along the movement direction of the wire and rotates the correction roller group around the wire. It is a feature. And it is supposed that it has the advantage that an obscuration can be effectively performed by rotating the correction roller group in the direction opposite to the twisting direction of the wire. In addition, “a device for correcting the bending and diameter of a wire rod” disclosed in Patent Document 2 includes a rotation holding portion that rotates around a transfer path of a linear material as a central axis, and a correction roller installed inside the rotation holding portion. And have. As a result, a load necessary for correction is applied over 360 degrees in the circumferential direction of the material with respect to the tensioned material, and correction can be performed even when the bending direction of the material varies. Has been.

  In addition, the applicant of the present application discloses a correction device of a system different from Patent Documents 1 and 2 in Patent Document 3. The straightening device of Patent Document 3 includes a turntable on which a coiled wire rod is placed, a plurality of straightening rollers arranged on the base, and tilting means for tilting the turntable or the base, and an arc of the wire. Control is performed to reduce the displacement angle formed by the plane including the portion and the correction plane formed by a plurality of correction rollers. In straightening experiments to confirm the effect, the straightness is zero, and it is confirmed that the straight line can be straightened. That is, it has been confirmed that it can be corrected with high linearity by urging from the outer side and the inner side of the arc of the wire rod.

JP-A-6-39466 JP 2005-177857 A JP 2008-110359 A

  By the way, the correction devices of Patent Document 1 and Patent Document 2 are similar in that the entire correction roller group is rotated around the wire rod, and there is a difficulty that the device configuration becomes complicated and large as compared with the conventional device. is there. Furthermore, a power source and a control device for rotating the correction roller group are required, and the cost is significantly increased. Moreover, although the effect is confirmed in the correction apparatus disclosed in Patent Document 3, the apparatus is complicated by the tilting means, and the control is complicated.

  The present invention has been made in view of the above background, and a straightening device capable of improving the accuracy of linearity when straightening a coiled wire rod, even in a simple and inexpensive device configuration, and Provide a correction method.

  The straightening device for coiled wire rod according to the present invention is arranged alternately in two rows in a straightening plane, a rotatable turntable for placing the coiled wire rod, wire rod supply means for drawing out the wire rod from the turntable, and the straightening plane. And a plurality of straightening rollers that have grooves that engage with the wire along the outer peripheral surface and alternately press the wire from both side surfaces. The wire rod is disposed in front of the straightening roller near the turntable or between the plurality of straightening rollers while being displaced from the straightening plane, and is freely rotatable and extends along the outer peripheral surface. A twist correcting roller that has a groove to enter and presses the wire from the side surface, and applies a correcting force in a direction intersecting the correction plane to the correcting roller and the wire engaging with the groove of the twist correcting roller. Like It is characterized in.

  The wire drawn from the turntable is provided with a spiral curl resulting from the original coil shape. A winding rod is characterized by an arc-shaped bent rod of the wire and a twist of the wire itself. Twist means rotation when the wire moves in the length direction. When an untwisted wire rod is bent into an arc shape, it is overlapped when it is rotated once. However, when a twisted wire rod is bent into an arc shape, it is displaced in the axial direction when it is rotated once to exhibit a spiral shape. In other words, the wire wound in a coil shape has a twist. In the present invention, for a wire having a three-dimensional spiral curl, first, the twist is removed by applying a straightening force in the axial direction of the spiral between the straightening roller and the straightening roller to form a two-dimensional arc. The main point is that the correction is performed and then straightened with high accuracy by a plurality of correction rollers within the correction plane including the arc.

  In the straightening device of the present invention, a wire such as a steel wire or a copper wire is placed on a turntable in a coiled form, and one end is drawn out. Here, a configuration in which a wire rod supply unit is disposed between the turntable and the correction roller and the wire rod is pushed into the correction roller, and a wire rod supply unit is disposed behind the correction roller and the wire rod is pulled out from the correction roller. There is. In either case, the wire rod is pulled out from the turntable by the wire rod supply means and is supplied to the plurality of straightening rollers.

  The plurality of correction rollers are alternately arranged in two rows, and further have a groove in which the wire rod is engaged along the outer peripheral surface so as to be freely rotatable. A plane connecting the centers of the grooves of each correction roller is a correction plane. The supplied wire rod is alternately pressed into the groove on the outer peripheral surface of the correction roller, and advances while meandering in the supply plane. On the other hand, the twist straightening roller is disposed in front of the leading straightening roller close to the turntable or between a plurality of straightening rollers, and is displaced from the straightening plane. Has a groove to engage. The supplied wire rod is also pressed into the groove on the outer peripheral surface of the twist correcting roller.

  Here, since the twist correction roller is displaced with respect to the correction plane, the wire gradually approaches the correction plane from the correction plane toward the correction roller behind the twist correction roller, and finally coincides with the correction plane. Bend like so. At this time, the correction force in the direction crossing the correction plane acts on the wire from both rollers. The straightening force can remove the twist of the wire, and the spiral curl can be corrected into an arc-shaped curl. In addition, since the arc-shaped bend is two-dimensional, it can be corrected with high accuracy by the action of the correction roller arranged in the correction plane.

  In the present invention, it is further preferable that the twist correcting roller is disposed immediately before the leading correcting roller.

  The twist correcting roller is disposed in front of the leading correcting roller close to the turntable or between a plurality of correcting rollers, but is preferably immediately before the leading correcting roller. This is because the correction roller placed in the correction plane corrects only the bend in the correction plane and does not have a correction function in the direction intersecting the correction plane. This is because it is reasonable to correct it into an arcuate bend.

  Furthermore, it is preferable to include a roller displacement amount adjusting means for adjusting a displacement amount of the twist correction roller from the correction plane.

  By adjusting the amount of displacement of the twist correction roller from the correction plane, the wire path from the outside of the correction plane to the correction plane changes, and the correction force changes. Thereby, it can respond to many types of wire materials from which a material and thickness differ. In addition, when the wire is reciprocally wound around the core over a plurality of layers, the roller displacement adjustment means can reverse the displacement in accordance with the direction of the spiral of the wire winding rod, The amount of displacement can be adjusted according to the decrease. If this is not done, there may be a case where the twist is mistakenly increased due to the correction force in the reverse direction, or a case where the spiral diameter and the displacement amount of the twist correction roller do not match and cannot be corrected well.

  Next, the coiled wire straightening device according to the present invention includes a rotatable turntable on which the coiled wire is placed, wire supply means for drawing the wire from the turntable, and two rows in a straightening plane. And a plurality of straightening rollers that are arranged on the outer periphery and have a groove into which the wire rod engages along the outer peripheral surface, and alternately presses the wire rod from both side surfaces. The apparatus is arranged in front of the leading correction roller near the turntable or between the plurality of correction rollers and is inclined with respect to the correction plane, and is freely rotatable and along the outer peripheral surface. A twist correction roller that has a groove into which the wire is engaged and presses the wire from a side surface, and corrects in a direction that intersects the correction plane with the correction roller and the wire that engages with the groove of the twist correction roller. Force applied It may be so.

  Instead of displacing the twist correction roller from the correction plane, the twist correction roller may be arranged inclined with respect to the correction plane. Even in this embodiment, the wire is bent so as to gradually approach the correction plane from the correction plane and finally match the correction plane.

  Next, the method for correcting a coiled wire rod according to the present invention is such that a coiled wire rod placed on a rotatable turntable is pulled out and rotated freely and arranged in two rows in the correction plane and the outer peripheral surface. A straightening method of a coiled wire rod, wherein the wire rod is alternately pressed from both side surfaces by a plurality of straightening rollers having grooves into which the wire rod engages, and is straightened, and is a head close to the turntable A groove in which the wire rod is inserted freely along the outer peripheral surface by being displaced from the correction plane or inclined with respect to the correction plane in front of the correction roller or between the plurality of correction rollers. A twist correcting roller having a straight line, pressing the wire from the side with the twist correcting roller, and applying a correction force in a direction intersecting the correction plane to the wire engaging with the groove of the correction roller and the twist correcting roller. Act Characterized in that way the.

  Furthermore, the three-dimensional spiral curl of the wire rod may be corrected to a two-dimensional arc-shaped curl by the correction force, and straightened by a plurality of the correction rollers.

  According to the straightening device and straightening method of the present invention, first, a helical curl is corrected to an arc-shaped bent wrinkle by applying a straightening force in a direction intersecting the straightening plane to the wire between the twist straightening roller and the straightening roller. Then, it can be straightened with high accuracy by a plurality of straightening rollers within a straightening plane including an arc. Therefore, the accuracy of linearity can be improved as compared with a conventional device, for example, a device that uses two groups of correction rollers to correct separately from the horizontal direction and the vertical direction.

  Further, the straightening device of the present invention provides a function of the twist straightening roller with a slight structural change such as changing the height of the leading straightening roller with a liner in a conventional straightening device using a plurality of straightening rollers. Can be realized. Therefore, even if the device configuration is cheaper and simpler than a device that rotates the entire correction roller group, the accuracy of linearity when correcting a coiled wire can be improved.

  Furthermore, in the aspect provided with the roller displacement amount adjusting means, it is possible to cope with various types of wire rods having different materials and thicknesses, and even when the wire rod is reciprocally wound around the core over a plurality of layers, it can be corrected well.

It is a figure explaining the correction apparatus of the coiled wire material of embodiment of this invention, (A) is a top view, (B) is a front view. It is sectional drawing explaining the structure of the twist correction roller in embodiment of FIG. In the embodiment of FIG. 1, it is the elements on larger scale explaining the correction | amendment effect | action with respect to the wire which has a helical curl. FIG. 4 is a partially enlarged view for explaining a correcting action for a wire rod having a different spiral curl direction. It is a figure explaining the structure of the correction apparatus of another embodiment which performed three types of confirmation experiment, (A) is a perspective view from a high angle, (B) is a perspective view from a low angle. It is a figure which shows the result of the twist generation | occurrence | production confirmation experiment using the correction apparatus of embodiment of FIG. It is a figure which shows the result of the twist correction confirmation experiment using the correction apparatus of embodiment of FIG. It is a figure explaining the result of the coil material correction | amendment confirmation experiment using the correction apparatus of embodiment of FIG. 5, (A) shows the graph of an experimental result, (B) has shown the definition of straightness.

  An embodiment for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a view for explaining a coiled wire straightening device 1 according to an embodiment of the present invention, in which (A) is a plan view and (B) is a front view. The straightening device 1 according to the embodiment includes a turntable and wire supply means (not shown), a base 2, four straightening rollers 31 to 34, a twist straightening roller 4, and the like. For the turntable, a device that can always keep the height of the feeding source constant even when the coiled wire is consumed is used. The wire rod supplying means is a portion for supplying a wire rod, and is arranged between the base 2 adjacent to the turntable (right side in FIG. 1) or behind the base 2 (left side in FIG. 1). Yes. As the wire supply means, for example, a feed roller device of a system in which a pair of opposing rollers are rotationally driven to pinch and feed the wire is used.

  As shown in FIG. 1A, the base 2 includes a main base 21 and a sub base 22 that are horizontally arranged at the same height. The sub-base 22 is supported at its left end 23 in a rotatable manner in the drawing, and a pressing fixing portion 24 on the lower right side is supported by a support rod 25 extending from the main base 21. The pressing and fixing portion 24 is urged toward the lower side of FIG. 1A so as to always move away from the main base 21 by a spring member. On the other hand, an operation lever 26 is provided at the tip of the support rod 25 so as to be rotatable and abut against the pressing and fixing portion 24. In FIG. 1A, the large-diameter portion 261 of the operation lever 26 is in contact with the pressing and fixing portion 24, and the sub base 22 is pressed and fixed toward the main base 21. When the operation lever 26 is rotated counterclockwise in the drawing and pulled toward the front side, the narrow width portion 262 abuts on the pressure fixing portion 24 and is pressed and fixed by a dimensional difference between the narrow width portion 262 and the large diameter portion 261. The part 24 moves downward in the figure. Thereby, the sub base 22 rotates to the near side. The reason why the sub-base 22 is turned as described above is to facilitate the work of setting the wire M first.

  In addition, a guide cylinder 27 that guides the twist correcting roller 4 through the wire M is provided at the right end in the drawing on the upper surface side of the main base 21. Further, a wire end detection sensor 28 is disposed on the left side of the main base 21 in the figure. The wire end detection sensor 28 includes a rotatable cylindrical sensor main body 281, a rod-shaped arm 282 projecting radially outward from the sensor main body 281, and a tube that is rotatable on the outer periphery of the arm 282. The body 283 is configured. The arm portion 282 is placed on the upper side of the wire M, and the cylindrical body 283 rotates freely when the wire M moves. When the wire M is removed, the arm portion 282 is pulled by gravity and moves downward, and the sensor main body portion 281 rotates to detect the end of the wire. Further, a wire rod cutting device is disposed on the left side of the wire end detection sensor 28 in the drawing, and the workpiece is manufactured by cutting the straight wire straightened.

  As shown in the figure, on the upper surface side of the sub base 22, a twist correcting roller 4, a second correcting roller 32, and a fourth correcting roller 34 are arranged in order from the right side in the drawing. On the other hand, on the upper surface side of the main base 21, a first correction roller 31 is disposed on the right side in the drawing, and a third correction roller 33 is disposed on the left side. These rollers 4, 31 to 34 are alternately arranged in two rows. Then, after passing through the guide tube 27, the wire M supplied from the right side in the drawing first comes into contact with the twist correction roller 4, and then comes into contact with the first to fourth correction rollers 31 to 34 in a meandering manner. It is like that. The first and third straightening rollers 31 and 33 of the main base 21 can be moved in the vertical direction in FIG. 1A by the push-in adjusting unit 39 so that the push-in amount can be adjusted. On the other hand, the positions of the twist correction roller 4 and the second and fourth correction rollers 32 and 34 of the sub base 22 are fixed. The indentation amount is an amount indicating the degree of meandering of the wire, and the indentation amount of zero indicates a state in which the straight wire passes just in contact on both sides, and a positive value of the indentation amount causes the wire M to meander by that amount. Show.

  As shown in FIG. 1B, the first to fourth correction rollers 31 to 34 are arranged at the same height, and the correction plane SH is defined at the center height of the groove on the outer peripheral surface. On the other hand, the twist correction roller 4 is disposed higher by a displacement amount ΔH.

  FIG. 2 is a cross-sectional view illustrating the structure of the twist correction roller 4. The twist correcting roller 4 includes a liner 41, a bearing 42, a roller body 43, a spring 44, a through bolt 45, and two nuts 46 and 46. The liner 41 is a cylindrical member having steps with different outer diameters, and a plurality of liners 41 are prepared so that the height H of the large-diameter portion 411 can be changed. The large-diameter portion 411 of the liner 41 is disposed directly above the fixing hole 221 provided in the sub base 22. A bearing 42 is fitted on the outer peripheral side of the small diameter portion 412 of the liner 41. A roller body 43 is horizontally fixed to the rotating portion 422 outside the bearing 42. The roller body 43 has a substantially disk shape, and has a groove having a V-shaped cross section along the outer peripheral surface, and the wire M is inserted into the groove. On the upper side of the fixed portion 421 inside the bearing 42, a substantially annular spring 44 is arranged. The fixing portion 421 of the bearing 42 is sandwiched between the leather 44 and the large diameter portion 411 of the liner 41. The through bolt 45 passes through the fixing hole 221, the liner 41, and the spring 44 of the sub base 22, and is tightened on both sides by nuts 46 and 46, so that the entire twist correcting roller 4 is fixed.

  The groove having a V-shaped cross section is an example of a structure that stably holds the wire M so as not to deviate from the correction plane SH, and may have a U-shaped cross section or other structures.

  The twist correction roller 4 can adjust the displacement amount ΔH from the correction plane SH by exchanging the liner 41 having a different height H of the large diameter portion 411. That is, the replacement of the liner 41 corresponds to a roller displacement amount adjusting unit. On the other hand, the first to fourth straightening rollers 31 to 34 have a structure similar to that of the twist straightening roller 4 and are different in that the height H of the large-diameter portion 411 of the liner 41 is a constant value.

  Next, the operation of the correction apparatus 1 of the embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a partially enlarged view for explaining the straightening action on the wire M having a spiral curl. FIG. 4 is a partially enlarged view for explaining the correcting action on the wire MR having a spiral curl direction different from that in FIG. The winding rods of the wire rods M and MR in the drawing are schematic, and the diameter of the winding rod is actually much larger than the diameter of the rollers 4, 31 and 32.

  In FIG. 3, the twist correcting roller 4 is disposed higher than the first correcting roller 31 by a displacement amount ΔH. On the other hand, the coil-shaped wire M has a spiral winding rod that goes downward as it proceeds in the length direction. That is, one end M1 of the wire M is directed obliquely upward along the spiral curl when no external force is applied. When the wire rod supply means supplies the wire rod M, the one end M1 passes through the guide tube 27, engages with the groove of the torsion correction roller 4, contacts the contact point I on the back side of the paper surface, and then descends slightly. While gradually approaching the correction plane SH, it engages with the groove of the first correction roller 31 and contacts the contact point J on the front side of the paper to coincide with the correction plane SH, and thereafter passes horizontally through the correction plane SH. To do. That is, the wire M is forcibly supplied obliquely downward from the twist correction roller 4 toward the first correction roller 31 instead of obliquely upward.

  Accordingly, an upward correction force FI that is substantially orthogonal to the correction plane SH acts on the wire M from the contact point I of the twist correction roller 4, and the correction plane is applied to the wire M from the contact point J of the first correction roller 31. A downward correction force FJ substantially perpendicular to SH acts. These correction forces FI and FJ act to remove the twist from the wire M and correct the spiral curl of the wire M. At this time, tensile stress or compressive stress in the length direction also acts on the wire M. Therefore, when the combined force obtained by adding the force in the length direction and the correction forces FI and FJ as a vector satisfies the yield condition of Mises, plastic deformation occurs and the spiral pitch P is corrected in a decreasing direction. The degree of correction varies depending on the amount of displacement ΔH of the correction roller 4 and the longitudinal force applied to the wire M. Therefore, by adjusting the displacement amount ΔH of the twist correcting roller 4 and the feeding force or tensile force of the material supplying means in accordance with the material, thickness, and curling property of the wire M, an arc shape with a pitch P = 0. It can be corrected to bend.

  As shown in FIG. 4, the twist correction roller 4 is displaced by −Δ from the first correction roller 31 with respect to the wire MR in which the direction of the spiral curl going upward in the length direction is different. It is natural that the HR is set lower. As a result, the directions of the correction forces FIR and FJR acting on the wire rod MR are reversed from those in the case shown in FIG.

  3 and 4, the wire rods M and MR after being corrected into the two-dimensional arc-shaped curved wrinkles are highly accurate by the first to fourth correction rollers 31 to 34 in the correction plane SH. It will be corrected.

  According to the correction device 1 of the embodiment, first, the correction forces FI, FJ, FIR, and FJR that are substantially orthogonal to the correction plane SH between the twist correction roller 4 and the first correction roller 31 are applied to the wires M and MR to be spiraled. The curved curl can be corrected into an arc-shaped bent wrinkle, and then straightened with high accuracy by the four correction rollers 31 to 34 within the correction plane SH including the arc.

  Further, the correction device 1 according to the embodiment can be realized by adjusting the displacement amount ΔH of the leading correction roller by exchanging the liner 41 in a conventional correction device using five correction rollers. Therefore, even with an inexpensive and simple device configuration, it is possible to improve the accuracy of linearity when correcting the coiled wires M and MR.

  Further, since the liner 41 having a different height H is exchanged as the roller displacement amount adjusting means of the twist correcting roller 4, various types of wire materials having different materials and thicknesses can be handled.

  For example, a height adjusting unit using a screw feed mechanism may be provided as the roller displacement amount adjusting means so that the height of the twist correcting roller 4 can be adjusted by manual operation or electric operation. Then, the amount of displacement ΔH of the twist correction roller 4 can be easily adjusted according to the spiral direction of the winding rod of the wire rod or the decrease in the spiral diameter. Therefore, it is suitable when the wire M is reciprocally wound around the core over a plurality of layers.

  Next, the confirmation experiment result using the correction apparatus 10 of another embodiment is demonstrated. FIG. 5 is a diagram illustrating the configuration of the correction apparatus 10 of another embodiment in which three types of confirmation experiments were performed, and (A) is a perspective view from a high angle. (B) is a perspective view from a low angle. This straightening device 10 is configured by arranging a twist straightening portion 7 and a horizontal straightening portion 6 in series. The twist correction unit 7 is configured by arranging three first to third twist correction rollers 71 to 73 on a horizontal base 52. Further, the horizontal correction unit 6 is configured by arranging five fifth to ninth correction rollers 65 to 69 on a horizontal base 51. The two bases 51 and 52 are connected, and a horizontal and common correction plane is formed. The wire M2 is supplied from the left side in the drawing, first corrected by the twist correction unit 7, and then corrected by the horizontal correction unit 6 so as to come out to the right side in the drawing.

  The three first to third twist correcting rollers 71 to 73 and the five fifth to ninth correcting rollers 65 to 69 have the same structure, a roll diameter D = 55 mm, and a roll pitch L = 70 mm between each other. The roll pitch is increased only between the third twist correction roller 73 and the fifth correction roller 65. In addition, the second twist correction roller 72, the sixth correction roller 66, and the eighth correction roller 68 are movable in a direction orthogonal to the wire M2, and the pushing amounts h2, h6, and h8 can be adjusted, respectively. Further, the three first to third twist correcting rollers 71 to 73 can be installed by being displaced higher by heights t1 to t3 = 2 mm by inserting the liner 59 between the bases 52. ing. In addition, the material of the wire M2 used for subsequent experiments is steel material S45C, and the diameter is 6 mm, and the spiral diameter or arc diameter of the curl is 1000 mm.

  First, in the first twist generation confirmation experiment, the twist generated when any of the first to third twist correction rollers 71 to 73 is displaced from the correction plane using the arc-shaped wire M2 having no twist. The angle θ was measured. The pushing amounts h2, h6, and h8 during the experiment were all zero. FIG. 6 is a diagram illustrating a result of a twist occurrence confirmation experiment using the correction device 10 of the embodiment of FIG. The horizontal axis in the figure indicates the position X in the length direction of the wire M2, and the vertical axis indicates the twist angle θ. Graph (1) in the figure shows a case where only the first twist correction roller 71 is displaced higher by t1 = 2 mm. Similarly, the graph (2) shows the case where only the second twist correcting roller 72 is displaced higher by t2 = 2 mm, and the graph (3) shows the case where only the third twist correcting roller 73 is displaced higher by t3 = 2 mm.

  As illustrated, in the graph (1), the twist angle θ is substantially proportional to the position X in the length direction of the wire M2. In the graph (2), the twist angle θ is in the reverse rotation direction and the value is slightly smaller than that in the graph (1). In the graph (3), the twist angle θ is slight. Accordingly, it has been found that the twist correcting roller displaced with respect to the correction plane has a function of generating a twist in the wire M2, and that the displacement of the first first twist correcting roller 71 contributes most to the twist angle θ.

  Next, in the second twist correction confirmation experiment, it was confirmed whether or not the twist of the wire M2 could be corrected by applying the function of generating the twist in the reverse rotation direction of the twist of the wire M2. In this experiment, the twisted angle θ was measured by changing the height t1 of the first twist correcting roller 71 using the spirally wound wire rod M2. The pushing amounts h2, h6, and h8 during the experiment were all zero.

  FIG. 7 is a diagram showing the results of a twist correction confirmation experiment using the correction apparatus 10 of the embodiment of FIG. The horizontal axis in the figure indicates the position X in the length direction of the wire M2, and the vertical axis indicates the twist angle θ. Graph (4) in the figure shows a case where the first twist correction roller 71 is displaced by t1 = 2 mm higher than the correction plane, and graph (5) corrects the first twist correction roller 71 at t1 = 0 mm. The case where it installs in the plane is shown. As shown in the graph, in the graph (4), the twist angle θ is substantially zero, and the twist can be corrected. Further, in the graph (5), a twist angle θ substantially proportional to the position X in the length direction remains, and the twist cannot be corrected.

  Next, in the third coil material correction confirmation experiment, the straightness K finally obtained when the coiled wire M2 was corrected was confirmed. In this experiment, the horizontal straightening unit 6 uses the wire M2 that is twisted and has a spiral shape and uses the horizontal straightening unit 6 for two cases of whether or not the twist angle θ is corrected by changing the height t1 of the first twist straightening roller 71. The final straightness K after correction was measured. The indentation amount during the experiment was adjusted such that the indentation amount h2 = 0 of the second torsion straightening roller 72 and the indentation amount h6 = 5 mm of the sixth straightening roller 66, and the indentation amount h8 of the eighth straightening roller 68 was variably adjusted as an experimental parameter. The straightness K is obtained by the following formula and FIG. 8B, L is the reference length of the wire M2, and Q is the maximum amount of distortion when the attitude of the wire M2 is changed up and down.

Straightness K = 4 × Q / (L × L)
FIG. 8 is a diagram for explaining the results of the coil material correction confirmation experiment using the correction apparatus 10 of the embodiment of FIG. 5, (A) shows a graph of the experimental results, and (B) shows the definition of straightness K. Is shown. In FIG. 8A, the horizontal axis indicates the pushing amount h8 of the eighth straightening roller 68, and the vertical axis indicates the straightness K. Graph (6) in the figure is a case where the first twist correction roller 71 is displaced by t1 = 2 mm with respect to the correction plane and the twist angle θ of the wire M2 is corrected as shown in FIG. Graph (7) shows the case where the first twist correction roller 71 is installed in the correction plane at t1 = 0 mm and the twist angle θ is left.

  As shown in the graph, in the graph (6), the error width K1 of the straightness K, that is, the correction limit is minimum when the pressing amount is h8 = h (best). On the other hand, in the graph (7), the error width K2 of the straightness K is twice or more that in the graph (6). That is, by correcting the twist angle θ of the wire M2 with the displaced first twist correction roller 71, the accuracy of linearity can be improved more than twice.

DESCRIPTION OF SYMBOLS 1, 10: Coiled wire rod correction device 2: Base 21: Main base 22: Sub base 27: Guide tube 28: Wire rod end detection sensor 31-34: First to fourth straightening rollers 4: Twist straightening roller 41: Liner 42: Bearing 43: Roller body 44: Osae 45: Through bolt 46: Nut 51, 52: Base 6: Horizontal correction part 65-69: Fifth to ninth correction roller 7: Twist correction part 71-73 : First to third twist correction rollers M, MR, M2: Wire material SH: Correction plane ΔH: Displacement amount FI, FJ, FIR, FJR: Correction force θ: Twist angle K: Straightness

Claims (6)

A rotatable turntable for placing a coiled wire, wire supply means for pulling out the wire from the turntable, and a staggered arrangement in two rows in the correction plane, and free to rotate and along the outer peripheral surface A straightening device for a coiled wire, comprising a plurality of straightening rollers that alternately press the wire from both sides with grooves into which the wire is engaged,
The wire rod is arranged in front of the straightening roller near the turntable or between the plurality of straightening rollers and displaced from the straightening plane, and is freely rotatable and along the outer peripheral surface. A twist correction roller that has a groove and presses the wire from the side surface;
A straightening device for a coiled wire rod, wherein a straightening force in a direction intersecting with the straightening plane is applied to the wire rods engaged in the grooves of the straightening roller and the twist straightening roller.   The coil wire straightening device according to claim 1, wherein the twist straightening roller is disposed immediately before the leading straightening roller.   The coiled wire rod straightening device according to claim 1, further comprising a roller displacement amount adjusting unit that adjusts a displacement amount of the twist straightening roller from the straightening plane. A rotatable turntable for placing a coiled wire, wire supply means for pulling out the wire from the turntable, and a staggered arrangement in two rows in the correction plane, and free to rotate and along the outer peripheral surface A straightening device for a coiled wire, comprising a plurality of straightening rollers that alternately press the wire from both sides with grooves into which the wire is engaged,
The wire rod is disposed in front of the straightening roller near the turntable or between the plurality of straightening rollers so as to be inclined with respect to the straightening plane, and is freely rotatable and along the outer peripheral surface. A twist correcting roller that has a groove to press the wire from the side,
A straightening device for a coiled wire rod, wherein a straightening force in a direction intersecting with the straightening plane is applied to the wire rods engaged in the grooves of the straightening roller and the twist straightening roller. A plurality of coiled wire rods placed on a rotatable turntable are pulled out, and are arranged in two rows in a straightening plane in a freely rotating manner and have a plurality of grooves into which the wire rods are engaged along the outer peripheral surface. A straightening method of a coiled wire rod, wherein the wire rod is alternately pressed from both sides with a straightening roller, and is straightened,
The front of the correction roller close to the turntable or in front of the plurality of correction rollers or displaced from the correction plane or inclined with respect to the correction plane, is freely rotatable and along the outer peripheral surface. Arranging a twist straightening roller having a groove into which the wire is engaged, pressing the wire from the side with the twist straightening roller;
A straightening method for a coiled wire rod, wherein a straightening force in a direction intersecting with the straightening plane is applied to the wire rods engaged with the grooves of the straightening roller and the twist straightening roller.   The coiled wire rod according to claim 5, wherein the three-dimensional spiral curl of the wire rod is corrected to a two-dimensional arc-shaped bent rod by the straightening force and straightened by a plurality of straightening rollers. Correction method.

Images