JP2007061822A - Bar material drawing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous drawing system capable of obtaining a bar material high in straightness at the outlet side of a roll. <P>SOLUTION: This system is provided with a straightening machine 3 having laterally straightening rollers 11 and longitudinally straightening rollers 12 for straightening a bar material at least from two sides of the lateral and longitudinal directions of a cross section between a bar material feed part 2 for feeding a coil-like bar material 10 and a drawing machine 6 provided with a die 15 for drawing the fed bar material. The straightening machine is provided with the rollers 11 and 12 of respectively 8-24 pieces, and the laterally straightening rollers are zigzag arranged in the right-to-left direction and the longitudinally straightening rollers are zigzag arranged in the vertical direction. The straightness of the bar material is improved with the straightening rollers of 8-24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a continuous drawing system that reduces a cross-sectional area by drawing a material made of a coil supplied from a feed portion with a drawing die.

As shown in Patent Document 1, a general continuous drawing system includes a coil supply stand that is a bar supply unit, a preliminary straightening machine that corrects the bar, and a drawing machine that includes a drawing die. Preliminary straightening machine has 4-7 rolls rotating in the horizontal direction (horizontal direction) and vertical direction (longitudinal direction), arranged in a staggered manner, bending the coil and pushing the appropriate rolls As a result, the supply bar is straightened.
JP 2000-5809 (see paragraphs 0002 to 0003)

  However, the above-mentioned continuous drawing system corrects only two surfaces in the transverse direction (X direction) and longitudinal direction (Y direction) of the cross section of the coil by the preliminary straightening machine, and the pushing angle to the straightening roller is limited. Therefore, in the correction with 4 to 7 rolls, the number of repeated bendings is small, and it is difficult to obtain high straightness on the roll exit side.

  In view of the above, an object of the present invention is to provide a continuous drawing system that can obtain high straightness on the roll exit side.

  In order to achieve the above-described object, the present invention provides a bar material in a horizontal direction and a vertical direction between a bar material supply unit that supplies a coiled bar material and a drawing machine that includes a die that pulls out the supplied bar material. And a straightening machine having a horizontal straightening roller and a vertical straightening roller for correcting from at least two sides of the direction, wherein the straightening machine is provided with 8 to 24 horizontal straightening rollers and vertical straightening rollers, respectively, The vertical straightening rollers are arranged in a zigzag pattern in the vertical direction.

  According to the above configuration, the number of vertical and horizontal correction rollers is 8 or more and the number of repeated bending increases, so that the distortion of the bar can be corrected and a bar with high straightness can be obtained. Here, the reason why the number of correction rollers is 8 or more is that when the number is 7 or less, the number of repeated bending is small, and when the number is 25 or more, there is no difference in straightness from the case of 24.

  The number of the vertical straightening rollers and the horizontal straightening rollers may be either an even number or an odd number within the range of 8 to 24, but an odd number within the range of 9 to 23 respectively. When arranged in a zigzag pattern, the first roller at the bar entry line position and the final roller at the line exit position in the opposite correction roller group can be the same roller group, and the bar line entry direction and the line exit direction. The line direction becomes easier to control.

  Further, the straightening surfaces of the bar are at least two surfaces in the horizontal direction and the vertical direction, but these two surfaces are not limited to the horizontal direction and the vertical direction, and include cases where they are inclined at a maximum of 45 degrees. That is, the axial direction of the roller shaft of the vertical straightening roller is set within a range inclined at a maximum of 45 degrees in the vertical direction from the horizontal position, and the axial direction of the roller shaft of the horizontal straightening roller is orthogonal to the roller shaft of the vertical straightening roller Inclined in the direction of

  A guide mechanism including a plurality of guide rollers for guiding the bar together with the straightening machine may be provided between the bar supply unit and the drawing machine. With this guide mechanism, the bar can be fed straight to the drawing die of the drawing machine.

  As described above, according to the present invention, the rod straightening machine is arranged at the front stage of the drawing machine, and as the straightening machine, eight or more horizontal straightening rollers and vertical straightening rollers are arranged in a staggered manner. The number of times of repeated bending increases, so that the distortion of the bar can be corrected and a bar with high straightness can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a continuous drawing system, and FIG. 2 is a side view of a straightening machine.

  As shown in the figure, the continuous drawing system 1 includes a bar supply unit 2, a straightening machine 3, a shot blasting machine 4, a guide mechanism 5, and a drawing machine 6 arranged in sequence.

  The bar supply part 2 is comprised from the coil supply stand by which the bar 10 was wound by the coil shape, and the bar with a maximum diameter of about 25 mm is supplied.

  The straightening machine 3 includes a horizontal straightening roller 11 and a vertical straightening roller 12 on both sides of a bar pass line in order to straighten the bar 10 from at least two sides of the cross section in the horizontal and vertical directions. Have. The horizontal correction roller 11 and the vertical correction roller 12 are provided by 8 to 24, respectively.

  The preferred number of horizontal correction rollers 11 and vertical correction rollers 12 is an odd number within a range of 9 to 23, respectively. The reason for this is that, in the opposing correction roller group, the first starting end roller at the entry line position of the bar and the final end roller at the exit line position can be the same side roller group, This is because the outgoing line direction can be easily controlled.

  The horizontal correction rollers 11 are arranged in a zigzag pattern in the left-right direction, and the vertical correction rollers 12 are arranged in a zigzag pattern in the vertical direction. In the illustrated example, 13 of the horizontal correction rollers 11 are arranged in a zigzag pattern and 12 of the vertical correction rollers 12 are arranged in a zigzag pattern. However, as described above, the invention is not limited to this.

  The horizontal correction roller 11 and the vertical correction roller 12 can be adjusted by adjusting handles 13 and 14 in the left-right direction and the vertical correction roller 12 in the vertical direction. The roller interval can be made constant from the start end side to the end end side, but in this embodiment, the start end side roller group narrows the opposing roller interval to increase the amount of bending of the bar, and then the start end side roller group The roller interval is gradually increased from the end roller group to the end side roller group so that the bending amount of the bar is gradually decreased, and the straightness of the bar is increased.

  A shot blasting machine 4 and a guide mechanism 5 are sequentially arranged behind the straightening machine 3, that is, between the straightening machine 3 and the drawing machine 6. The shot blasting machine 4 has a known structure for removing the scale from the surface of the bar 10 before coming out of the straightening machine 3 and entering the drawing die 15 of the drawing machine. The guide mechanism 5 following the shot blasting machine 4 is provided with a plurality of guide rollers 5a for guiding the bar 10 coming out of the shot blasting machine 4 to the drawing machine 6 side.

  The drawing machine 6 includes a drawing die 15, and a drawing carriage 16 having a known structure for moving the bar 10 to the rear while holding the bar 10 is provided behind the die 15.

  In the above configuration, the bar 10 sequentially supplied from the coil supply stand 2 is corrected by the correction machine 2 before entering the drawing die 15. In the straightening machine 2, 8 to 24 horizontal straightening rollers 11 and vertical straightening rollers 12 are provided on both the left and right sides and the up and down sides of the bar material with the pass line interposed therebetween, and these are arranged in a staggered manner. Has been.

  Therefore, even if the bar 10 is brazed in a coil shape, the bar is corrected in multiple stages by 8 to 24 rollers arranged in a staggered manner. Therefore, distortion of the bar is reduced, and high straightness can be exhibited. Moreover, the bar is corrected from at least two surfaces in the left-right direction (lateral direction) and the up-down direction (vertical direction) by 8 to 24 horizontal straightening rollers 11 and vertical straightening rollers 12, and the number of repeated bending is large. As a result, the correction is made uniformly and the straightness is increased.

  Next, the bar 10 exiting the straightening machine 3 is removed from the surface of the bar 10 before entering the drawing die 15 by the shot blasting machine 4, and is supplied to the drawing die as a smooth surface.

  In this way, the straightening machine arranged in the previous stage of the drawing machine has 8 to 24 horizontal straightening rollers and vertical straightening rollers arranged in a staggered manner, so that the number of repeated bending increases, and the bar material It is possible to obtain a bar having a high degree of straightness by correcting the distortion.

  Of course, the present invention is not limited to the above-described embodiment, and many modifications and changes can be made within the scope of the present invention. For example, in the above-described embodiment, the vertical straightening roller and the horizontal straightening roller are arranged so as to correct two surfaces of the bar in the horizontal direction and the vertical direction, but the axial direction of the roller shaft of the vertical straightening roller is vertically changed from the horizontal position. It can be set within a range inclined by 45 degrees at the maximum, and the axial direction of the roller axis of the horizontal correction roller can be provided in a direction perpendicular to the roller axis of the vertical correction roller. Even in this case, the roller axes of the vertical correction roller and the horizontal correction roller are in a state of being orthogonal to each other, and two surfaces of the bar can be corrected.

Schematic of a continuous drawing system showing an embodiment of the present invention Side view of straightening machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Continuous drawing system 2 Bar supply part 3 Straightening machine 4 Shot blasting machine 5 Guide mechanism 6 Drawing machine 10 Bar material 11 Horizontal correction roller 12 Vertical correction rollers 13 and 14 Adjustment handle 15 Pulling die 16 Pulling carriage

Claims (4)

A horizontal straightening roller that corrects the bar from at least two sides in the horizontal and vertical directions between a bar supply unit that supplies the coiled bar and a drawing machine that includes a die that pulls out the supplied bar And 8 to 24 horizontal correction rollers and vertical correction rollers, respectively, and the horizontal correction rollers are arranged in a staggered manner in the left-right direction. A bar drawing system characterized in that rollers are arranged in a staggered pattern in the vertical direction. 2. The rod drawing system according to claim 1, wherein the horizontal straightening roller and the vertical straightening roller have an odd number of rollers arranged in a staggered manner within a range of 9 to 23, respectively. The axial direction of the roller shaft of the vertical straightening roller is set within a range inclined 45 degrees in the vertical direction from the horizontal position, and the axial direction of the roller shaft of the horizontal straightening roller is orthogonal to the roller shaft of the vertical straightening roller. 3. The rod drawing system according to claim 1 or 2, wherein the drawing system is inclined in a direction. The guide mechanism provided with the some guide roller which guides a bar with the said straightening machine between the said bar supply part and a drawing machine was provided. Continuous drawing system for bars.

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