JP2011143423A - Working bench for straightening bend of steel wire coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working bench for straightening the bend, with which the time required by one process for straightening a steel wire coil is shortened. <P>SOLUTION: In the working bench 1 for performing work for straightening the bend in the tip part of the steel wire W of the steel wire coil C, the bench includes a coil rotating mechanism 2 which is installed separately from a steel wire straightening line for straightening while pulling out the steel wire W form the steel wire coil C and by which the steel wire coil C while fall sideways is rotated around its axial center CA and a bend straightening tool 3 with which force can be applied to the steel wire W in a direction for bending the steel wire W oppositely to the direction of the above bend in order to straighten the bend of the steel wire W. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bending correction work table and a bending correction method for a steel wire coil. Specifically, the present invention relates to a bending correction method for correcting the bending of a steel wire tip of a coil prior to straightening the steel wire coil, and a work table for performing the bending correction work.

  A hot rolling method is known as a method for producing steel bars and steel wires. In this manufacturing method, first, the billet is hot-rolled by a multistage rolling mill. The billet is reduced in diameter and lengthened by hot rolling. A relatively small diameter steel wire is shaped into a coil, and a relatively large diameter steel rod is shaped into a straight line having a predetermined length. An example of a method for manufacturing a steel bar is disclosed in Japanese Patent Application Laid-Open No. 2005-138146.

  In the market, there may be a demand for relatively small diameter steel bars. In order to meet this demand, the coiled steel wire is straightened and cut to a predetermined length to produce a steel bar. The straightening process for the steel wire coil is performed in a steel wire straightening facility.

  FIG. 4 shows a plan view of an example of the steel wire straightening equipment 51. The steel wire straightening equipment 51 includes a coil stand 52 on which the coil C to be straightened is placed, a straightening machine 54 that straightens the coiled steel wire by the multistage roller 53, and a substantially straightened steel wire W. Are installed, a deburring table 56 for performing surface treatment such as deburring, an inspection table 57 for performing various inspections on the steel wire W, a defective cradle 58, and the like.

  FIG. 5 shows a side view of the coil stand 52 and the linear machine 54. A coil C is placed (vertically placed) on the rotatable coil stand 52 with its central axis oriented in the vertical direction. The coil C can be rotated around its stop axis manually on the coil stand 52. Since the steel wire W drawn from the coil C is curved, its tip cannot easily pass through the linear machine 54. In order to solve this problem, conventionally, before the tip of the steel wire W is inserted into the linear machine 54, there is an operation of correcting the curvature of a portion of a predetermined length (for example, about several hundred mm) from the tip of the steel wire. Has been done. This curving correction work is performed on the coil C in a state of being placed on the coil stand 52 as shown in FIG. An example of a method for correcting curling of long objects is disclosed in JP-A-8-39662.

JP 2005-138146 A Japanese Patent Laid-Open No. 08-039662

  As described above, in the prior art, the bending correction of the steel wire W is performed on the coil stand 52 which is a part of the steel wire straightening line on which so-called online processing is performed. Therefore, the steel wire straightening process is stopped during the bending correction work.

  An object of the present invention is to provide a curving straightening work table and a curving straightening method capable of shortening the time required for one step of straightening the steel wire coil.

The bending correction work table of the steel wire coil according to the present invention,
It is a bending correction work table on which the work of correcting the bending of the steel wire tip of the steel wire coil is made,
It is installed separately from the steel wire straightening line that straightens while pulling out the steel wire from the steel wire coil, and in order to correct the curvature of the steel wire, the direction to bend the steel wire in the direction opposite to the above-mentioned curve And a coil rotation mechanism for rotating the steel wire coil in a sideways state around its axis, and the height position of the curvature correction tool can be adjusted. Yes.

  According to the bending straightening work table having such a configuration, the straightening work of the steel wire tip is performed on the steel wire coil before being supplied to the steel wire straightening line in parallel with the straightening process of the previous coil. be able to. As a result, the time for one process can be shortened.

  The coil rotation mechanism may include a pair of rollers that are spaced apart from each other in parallel to place the coil, and a drive device that rotationally drives at least one of the pair of rollers. It is.

  It is preferable that the curvature correcting work table includes a support column installed on both ends in the longitudinal direction of the coil mounted on the pair of rollers, and a coil rolling prevention member installed along each of the pair of rollers. .

  It is preferable that the position of the column in the coil longitudinal direction is adjustable.

The method for correcting the bending of a steel wire coil according to the present invention includes:
In the steel wire straightening line of the steel wire coil, including the straightening step of straightening the steel wire coil while pulling out the steel wire from the steel wire coil, the straightening step of correcting the bending of the steel wire tip of the coil before straightening is included. And
This curving straightening process is placed in a lying state on a coil rotation mechanism for rotating a steel wire coil around its axis in an off-line state deviating from the steel wire straightening line. This is a step of applying a force in a direction to bend in the direction opposite to the above-mentioned curve by a curvature correction tool whose position can be adjusted.

  According to the steel wire coil curving straightening work table and the curving straightening method according to the present invention, the time required for one step of straightening the steel wire can be shortened.

FIG. 1 is a side view schematically showing a steel wire coil bending correction work table according to an embodiment of the present invention. Fig.2 (a) is a side view which shows the curvature correction tool in the curvature correction work table | surface of FIG. 1, FIG.2 (b) is the front view. FIG. 3 is a perspective view showing a part of the configuration of the curvature correcting work table of FIG. 1. FIG. 4 is a plan view showing an example of a steel wire straightening facility to which the curving straightening work table and the curving straightening method of the present invention can be applied. FIG. 5 is a coil stand in a steel wire straightening facility in which a bending correction operation for a tip portion of a steel wire coil is conventionally performed.

  Hereinafter, the present invention will be described in detail based on embodiments with appropriate reference to the drawings.

  The steel wire coil (hereinafter simply referred to as a coil) C curving straightening workbench 1 shown in FIG. 1 is for performing the curving straightening work in a so-called offline state in the steel wire straightening equipment 51 shown in FIG. Equipment. That is, the curvature correcting work table 1 is not installed in the line from the coil stand 52 to the inspection table 57 and the defective product cradle 58, and is installed in a state of being off the line. For example, the curvature correcting work table 1 may be installed at a position indicated by a two-dot chain line in FIG. Therefore, in parallel with the straightening process for the previous coil C in the above line, the bending correction operation for the steel wire tip of the coil C to be straightened next can be performed. As a result, for example, it is possible to shorten the time by 3 to 5 minutes in the entire linearization process for one coil. This corresponds to an average time reduction of about 10 hours per month.

  The bending correction work table 1 includes a coil rotating mechanism 2 for rotating the coil C in a laid state around its axis CA, and a bending correction tool 3 used for correcting the bending of the steel wire W. .

  The coil rotation mechanism 2 includes a driving roller 4 and a driven roller 5 that are installed in parallel with a distance from each other, and a driving device 6 that rotationally drives the driving roller 4. If necessary, both rollers 4 and 5 may be configured as drive rollers. As the driving device 6, an electric motor 7 and a transmission belt 8 are employed. As the electric motor 7, it is preferable to use a servo motor so that the amount of rotation of the coil C can be freely adjusted. As shown in FIG. 1, the coil C is placed in a state of being stretched over both rollers 4 and 5. Since the rotation angle of the coil C on the roller is adjusted by electric control, the tip of the steel wire W can be easily moved to a position suitable for work. Close to both rollers 4 and 5, mechanisms 18 and 20 are provided for preventing the rolling and falling of the coil C, which will be described later.

  The curvature correction tool 3 is suspended by a so-called tool balancer 10 installed on the support column 9. The tool balancer 10 is typically equipped with a reel around which a suspension belt 11 is wound and a spring member that exerts an elastic rewinding action. The curvature correcting tool 3 is attached to the tip of the hanging belt 11. The operator can freely adjust the height position of the curvature correction tool 3 corresponding to the coils having different diameters by the tool balancer 10. A simple chain block or the like may be used instead of the tool balancer 10.

  The curvature correcting tool 3 shown in FIG. 2 has a main body 12 and an operating cylinder 13 engaged with the main body 12. A hydraulic cylinder can be adopted as the working cylinder 13. It is also possible to employ a solenoid or the like instead of the hydraulic cylinder. The main body 12 is formed with a pair of seven-shaped locking portions 14 that can be locked at two positions spaced apart in the longitudinal direction of the steel wire W. The separation distance between the two locking portions 14 substantially matches the length of the range in which the curvature of the steel wire W is to be corrected (for example, 300 to 400 mm). The main body 12 is formed with a working cylinder housing portion 15 that is continuous with the locking portion 14. As shown in FIG. 2 (b), the working cylinder 13 is arranged such that its piston rod 13 a extends toward the center between the pair of locking portions 14. The piston rod 13a operates so as to apply a force to the steel wire W locked to the locking portion 14 in a direction in which it is bent in the direction opposite to the curve. The operation button 16 of the working cylinder 13 is provided on the main body 12 at a position close to the working cylinder housing portion 15. The main body 12 is further formed with a connecting portion 17 for connecting the hanging belt 11.

  FIG. 3 shows mechanisms 18 and 20 for preventing the coil C placed on the rollers 4 and 5 from rolling and falling. In FIG. 3, the curvature corrector 3 and the driving device 6 are not shown. A rolling prevention member 18 for the coil C is provided along the rollers above and slightly outside near the rollers 4 and 5. When the coil C rolls and tries to get over the rollers 4 and 5, the coil C comes into contact with the rolling preventing member 18 and is prevented from rolling and dropping. In other words, the rolling prevention member 18 is a roller overpass prevention member. In the present embodiment, the rolling prevention member 18 is fixed to a support plate 19 erected on the floor surface of the curvature correcting work table 1. However, the configuration is not limited. For example, the rolling prevention member 18 may be fixed to a support bracket suspended from the ceiling. Further, when a shaft is inserted through the center of the coil C and both ends of the shaft protrude from the coil C, a rolling preventing member that abuts on both ends of the shaft and prevents the coil C from rolling is provided. It can be adopted.

  An overturn prevention member 20 for preventing the coil C from overturning in the axial direction is disposed between the rollers 4 and 5 and at both ends of the rollers 4 and 5. The pair of fall prevention members 20 have a height close to the upper end of the coil C on the rollers 4 and 5. The fall prevention member 20 is movable on a rail 21 laid between the rollers 4 and 5 in parallel with the rollers 4 and 5. With this configuration, the position of the fall prevention member 20 can be adjusted in accordance with the difference in the axial height of the coil C.

  In order to prevent the coil C from wrinkling, the portions of the rolling prevention member 18 and the fall prevention member 20 that are in contact with the coil C are formed of a relatively flexible material such as synthetic resin.

  The bend straightening work table and the bend straightening method described above are suitable for a continuous straightening process for a plurality of steel wire coils.

DESCRIPTION OF SYMBOLS 1 ... Curve correction work table 2 ... Coil rotation mechanism 3 ... Curve correction tool 4 ... Drive roller 5 ... Driven roller 6 ... Drive apparatus 7 ... Electric motor 8 ... Transmission belt 9 ... support pillar 10 ... tool balancer 11 ... suspending belt 12 ... main body 13 ... acting cylinder 14 ... locking part 15 ... acting cylinder housing part 16 ··· Operation buttons 17 ··· Connection portion 18 · · · Rolling prevention member 19 · · · Support plate 20 · · · Fall prevention member 21 · · · Rail

Claims (5)

It is a bending correction work table on which the work of correcting the bending of the steel wire tip of the steel wire coil is made,
It is installed separately from the steel wire straightening line that straightens while pulling the steel wire from the steel wire coil.
In order to correct the bending of the steel wire, a bending correction tool capable of applying a force in the direction of bending the steel wire in the direction opposite to the above bending;
A coil rotation mechanism for rotating the steel wire coil in a sideways state around its axis,
A steel wire coil curvature correction work table in which the height position of the curvature correction tool is adjustable. The coil rotation mechanism is
A pair of rollers installed in parallel and spaced from each other to place the coil;
2. The steel wire coil curvature correcting work table according to claim 1, further comprising a drive device that rotationally drives at least one of the pair of rollers. Struts installed on both ends in the longitudinal direction of the coil placed on the pair of rollers,
The steel wire coil curvature correcting work table according to claim 2, further comprising a coil rolling prevention member installed along each of the pair of rollers.   The bending correction work table of the steel wire coil according to claim 3, wherein a position of the support column in the coil longitudinal direction is adjustable. In the steel wire straightening line of the steel wire coil, including the straightening step of straightening the steel wire coil while pulling out the steel wire from the steel wire coil, the straightening step of correcting the bending of the steel wire tip of the coil before straightening is included. And
This curving straightening process is placed on a coil rotation mechanism for rotating the steel wire coil around its axis in an off-line state deviated from the steel wire straightening line. A method for correcting the bending of a steel wire coil, which is a step of applying a force in a direction to bend in a direction opposite to the above-described bending with a bending correction tool whose position can be adjusted.

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