JP6094633B2 - H-shaped steel reversing device - Google Patents

Description

  The present invention relates to a reversing device for H-section steel for reversing H-section steel that is being straightened by 180 ° by means of a press straightening machine.

  As shown in FIG. 6, the H-section steel 100 has a web 101 and flanges 102 at both ends in the web height direction. Regarding the posture of the H-shaped steel, the posture in which the web 101 is horizontal (the flange 102 is vertical) as shown in FIG. 6 is called the H posture, while the web 101 is rotated 90 degrees from the H posture to be vertical (the flange 102 is horizontal). The posture that becomes) is called the I posture. The H-section steel is usually manufactured by a universal rolling mill. The universal rolling mill is provided with a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls, and these rolls are used to squeeze the web-corresponding portion and the flange-corresponding portion of the material to be rolled as a product shape of H-section steel. Go. As shown in FIG. 7, the H-shaped steel as it is produced by rolling is bent such that a plane figure perpendicular to the thickness direction of the web 101 is deformed from a linear shape to an arc shape, as shown in FIG. A warp formed by deforming a side surface figure perpendicular to the thickness direction of the flange 102 from a linear shape to an arc shape may occur entirely or locally.

  The occurrence of such bending and warping is affected by various factors that cause asymmetric rolling on the top, bottom, left, and right, such as unbalance in rolling in universal rolling and initial shape defects of the material to be rolled. It is very difficult to eliminate the influence of these factors.

  Therefore, cold straightening is performed to straighten the shape of the H-section steel that has been bent or warped even if the rolling conditions are adjusted.

  With regard to the cold correction, conventionally, correction is performed online with a roller straightening machine for warping (see, for example, Patent Document 1), but for bending, the correction load is larger than warping. Therefore, press correction is performed offline (see, for example, Patent Document 2).

  Press correction is performed using a press correction machine 20 as shown in FIG. In general, the press straightening machine 20 supports two portions in the longitudinal direction of the flange outer surface on the inner bending side (side with a small radius of curvature) with two supporting dies 21, and the outside between the two supporting dies 21, 21. The flange outer surface on the bending side (the side with the larger radius of curvature) is configured to be pressed in the pressing direction 24 with a single pressing die 22. The H-section steel 100 in the press straightening machine 20 is supported by the transport roller 30 and is transported in the transport direction 31. The transport direction 31 may be switched in the reverse direction as necessary. During the conveyance, the sheet is temporarily stopped several times, and during this stop, the portion to be corrected between the two supporting molds 21 and 21 is pressed by the pressing mold 22 in the pressing direction 24 to perform press correction.

  There is also a press straightening machine in which the pressing portion of the pressing die 22 is replaced with the outer surface of the flange on the outer bending side and the inner surface of the flange on the inner bending side (see Patent Document 2).

  In the H-section steel used for press straightening, the curvature center positions of the bending may be opposite to each other with respect to the web height center line at a certain position and other positions in the longitudinal direction. In this case, since the pressing die and the supporting die of the press straightening machine are fixed and it is impossible to replace the arrangement of these molds, the H-shaped steel in the press straightening machine is turned 180 ° in the cross section. It is necessary to reverse. In addition, if the H-shaped steel is often seized at the time of this reversal, the maintenance load for removing the soot in the subsequent process becomes large.

  As an H-shaped steel reversing device, for example, Patent Document 3 describes a reversing device that reverses the H-shaped steel in the I posture by 180 ° by combining three levers that can rotate up and down. Further, Patent Document 4 describes a turning device in which an inclined skid that can be raised and lowered and a guide arm that can be raised and lowered are installed on the side surface of the turning machine, and the rolled shape steel can be gently landed. Yes. Further, Patent Document 5 discloses a first rotating device that rotates a long steel material by 90 ° from a vertical posture to a horizontal posture, and a length of the horizontal posture that is disposed opposite to the first rotating device at a predetermined interval. A turning device is described in which a long steel material can be turned 180 ° by providing a second rotating device that rotates the steel material 90 ° to obtain a vertical posture.

Japanese Patent Laid-Open No. 08-174069 JP 2008-030090 A Japanese Patent Publication No. 63-002846 Japanese Utility Model Publication No. 62-017622 JP 09-156762 A

  By the way, the turning device described in Patent Documents 3 to 5 turns the shape steel by a turning operation of a lever or a skid on which the shape steel is placed, but a horizontal direction orthogonal to the length direction of the shape steel. When the shape steel is turned 180 °, the shape steel largely moves in the horizontal direction perpendicular to the length direction of the shape steel. Since all the rolling devices shown in Patent Documents 3 to 5 attempt to turn the shape steel while the shape steel is being transferred in the horizontal direction perpendicular to the longitudinal direction, the shape steel is being turned during the turning. Even if it moves greatly in the horizontal direction, it is easy to secure a space for this movement.

  However, in the press straightening machine as shown in FIG. 9, the pressing die 22 and the supporting die 21 are disposed so as to face the horizontal direction orthogonal to the length direction of the H-shaped steel. The rotation needs to be performed within the range of the distance between the pressing mold 22 and the supporting mold 21 facing each other. If the H-section steel moves greatly in the horizontal direction during turning, the H-section steel being turned interferes with these molds. Although this interference can be avoided if the distance between the pressing die and the supporting die facing in the horizontal direction is increased, the moving stroke of the die must be longer than the length necessary for pressing, and the transport roller 30 It is necessary to lengthen the trunk length. In addition, when performing press correction, so-called centering is required to align the position of the H-section steel with a predetermined position of the press-correcting machine, but if the H-section steel moves greatly in the horizontal direction along with the rotation, the H-section steel is rotated. Centering with large movements is required every time. This leads to an increase in the size of the centering device. That is, there are many problems in terms of equipment restrictions when using the turning device described in Patent Documents 3 to 5 as a device for turning the H-shaped steel in the press straightening machine.

  Moreover, in the thing of patent documents 3-5, the reason for rotating a shape steel is for making it easy to stack and bind a plurality of shape steels, and the angle to rotate is 90 degrees or 180 degrees. In the press straightening machine, it is possible to correct both the bend shown in FIG. 7 and the warp shown in FIG. 8. When the press straightener shown in FIG. 9 is used to correct both the bend and the warp, the bend is corrected. When correcting the H, the H-section steel is in the H position, and when correcting the warp, the H-section steel is in the I position. In this case, the H posture is turned 180 ° to correct the bend as the H posture, and then the turn is further turned 90 ° (turned 270 ° from the initial state) to correct the warp in the I posture. However, the turning devices described in Patent Documents 3 to 5 do not have a configuration in which the section steel once turned 180 ° is further rotatable in the same direction.

  Therefore, it was difficult to apply the turning device described in Patent Documents 3 to 5 as a turning device for disposing in the press straightening machine.

  Therefore, the present invention provides an H-section steel reversing device that can turn the H-section steel in a press straightening machine by 180 ° and can be reversed, and can effectively reduce wrinkling during reversal. That was the issue.

The present invention made to solve the above-mentioned problems is as follows.
(1) An H-section steel reversing device for turning an H-section steel in a press straightener from an H position to an inverted H position, or from an I position to an inverted I position, in the longitudinal direction of the H section steel A part of the circumference is surrounded by the L-shaped corners of the L-shaped frame, and the L-shaped frame is rotated in a plane orthogonal to the H-shaped steel conveying direction and moved in the H-shaped steel conveying width direction. An H-section steel reversing device, comprising: a turner; and a reversing auxiliary buffer for supporting and rotating the H-section steel that is being turned from the I position to the H position by an auxiliary arm.

  Here, as described above, the “H posture” is a posture in which the web 101 is horizontal (the flange 102 is vertical) as shown in FIG. 6, and the “I posture” is a vertical position of the web 101. It is a posture in which the flange 102 is horizontal. Further, “inversion” means turning 180 °. Further, “turning” means that a long axis orthogonal section of a long material, for example, an H-shaped steel, rotates in a long axis orthogonal plane of the long material.

  According to the present invention, the H-shaped steel in the H posture in the press straightening machine can be reversed, and furthermore, when the H-shaped steel is reversed, the cracking of the H-shaped steel is reduced, and the wrinkle removal in the post-process is eliminated. There is an excellent effect of reducing the maintenance load.

It is a top view of the reversing device of H section steel concerning one embodiment of the present invention. It is a front view of the apparatus which shows the mechanism of the turner in FIG. It is a front view of the apparatus which shows the mechanism of the inversion auxiliary buffer in FIG. It is a front view of the reversing device which shows the turning process from I posture to H posture of H section steel using the reversing device concerning the present invention. It is a front view of the inversion apparatus which shows the structure (mechanism) in which the parts of the inversion apparatus of H-section steel using only a turner move in relation to each other. It is a front view which shows the outline | summary of the web of a H-section steel, and a flange. It is a top view which shows the outline | summary of the bending of H-section steel. It is a side view which shows the outline | summary of the curvature of H-section steel. It is a top view which shows the outline | summary of a press straightening machine.

  FIG. 1 is a plan view of an H-section steel reversing device according to an embodiment of the present invention. In FIG. 1, 1 is a turner, 10 is a reverse auxiliary buffer, and the same code | symbol is attached | subjected to the same or equivalent member as the previous figure, and description is abbreviate | omitted. In this embodiment, one turner 1 is installed in the entrance side area of the press straightening machine 20 (a range from the entrance to a position about 3 m away from the upstream side), and the reverse auxiliary buffer 10 is adjacent to the turner 1. And one in the exit side area of the press straightening machine 20 (range from the exit to a position about 3 m away from the downstream side). However, the installation location of the turner 1 and the reversal auxiliary buffer 10 is not limited to the location shown in FIG. 1, and other locations may be selected as appropriate. The press straightening machine 20 is accompanied by a centering means (not shown) for laterally moving the H-section steel 100 to a width alignment position (referred to as a centering position CL) set in the conveyance path width direction.

  FIG. 2 is a front view of the apparatus showing the mechanism of the turner 1 in FIG. As shown in FIG. 2, the turner 1 surrounds a part of the circumference in the longitudinal direction of the H-shaped steel 100 with the L-shaped corner 3 of the L-shaped frame 2, and the L-shaped frame 2 is conveyed in the H-shaped steel conveying direction. Is rotated around the center of rotation 2C in a plane perpendicular to the plane (that is, in the plane of FIG. 2) and moved in the H-shaped steel conveyance width direction (that is, the trunk length direction of the conveyance roller 30 in FIG. 2). The L-shaped corner portion 3 includes a main arm portion 3A and a sub arm portion 3B which are orthogonal to each other, and the main arm portion 3A is in a horizontal position when the turner 1 is in a standby state.

  A configuration for rotating the L-shaped frame 2 will be described. In the configuration of FIG. 2, the L-shaped corner portion of the L-shaped frame 2 has an arc shape, and the arc shape is supported by the carriage 4 so as to be able to roll. An air cylinder 5 is rotatably mounted on the carriage 4, and the forward / backward rod tip of the air cylinder 5 is rotatably mounted at one place of the arc shape. As a result, the L-shaped frame 2 rotates using the air pressure of the air cylinder 5 as power.

  A configuration for moving the L-shaped frame 2 will be described. In the configuration of FIG. 2, the carriage 4 is advanced and retracted by the advance and retreat rod of the air cylinder 6 fixed to the base. As a result, the L-shaped frame 2 moves using the air pressure of the air cylinder 6 as power.

  Regarding the operation of the turner 1, the operator of the press straightening machine operates the turner operation panel attached to the operation panel of the press straightening machine to adjust the air pressure of the air cylinders 5 and 6 so that the L-shaped frame body 2 is rotated and moved.

  FIG. 5 is a front view of the reversing device showing a mechanism (mechanism) in which parts of the reversing device of the H-section steel using only the turner move in relation to each other. In FIG. 5, (a) to (d) are turning steps from the H posture to the I posture, and (e) to (h) are turning steps from the I posture to the H posture. The same reference numerals are given and description thereof is omitted.

  In the turning process from the H posture to the I posture, when the L-shaped frame 2 is rotated clockwise while moving leftward from the standby state as shown in FIG. ), The lower end of the left flange of the H-shaped steel 100 is lifted by the main arm portion 3A. The lower end of the right flange is supported by the conveyance roller 30. As the rotation and movement further proceed, the H-section steel 100 is pushed by the main arm 3A and gradually turns clockwise as shown in FIG. Here, since the L-shaped frame body 2 is moving in the right direction in the figure along with the rotation, it is possible to prevent the H-section steel from largely moving in the left direction in the figure along with the turning of the H-section steel. Thereafter, the L-shaped frame 2 is moved to the right and returned to the standby state as shown in FIG. 5D, but during this movement, the rotation is free. That is, the air cylinder 5 (see FIG. 2) is temporarily disabled, and even if the L-shaped frame 2 during the movement interferes with the H-shaped steel 100, it rotates without resistance (the H-shaped steel 100 does not move). ) After returning the L-shaped frame 2 to the standby state, the H-shaped steel 100 is moved laterally to the centering position CL by the centering means (not shown).

  If the vehicle 4 has a configuration in which the vehicle height can be changed by, for example, a vehicle body raising / lowering actuator, when returning to the standby state, the vehicle height of the vehicle 4 is lowered to lower the L-shaped frame 2 and the L-shaped frame 2 is lowered. It is preferable that interference between the body 2 and the H-shaped steel 100 can be avoided more easily.

  In the turning step from the I posture to the H posture, when the L-shaped frame 2 is rotated clockwise while moving leftward from the standby state as shown in FIG. ), The H-shaped steel 100 in the I posture is rotated clockwise as the bottom is gradually lifted by the main arm portion 3A, and when the center of gravity of the H-shaped steel 100 deviates from the vertical sky above the bottom, It turns by its own weight and falls into the sub arm 3B. Subsequently, as shown in FIG. 5G, in the H-shaped steel 100, the flange in contact with the sub arm portion 3B slides downward and comes into contact with the conveying roller 30, and accordingly, the opposite flange is the main arm portion. It slides on 3A and is displaced. Thereafter, the L-shaped frame 2 is moved rightward to return to the standby state. During this movement, the rotation is free as described above. As a result, as shown in FIG. 5 (h), the H-section steel 100 shifts to an H posture in which left and right are reversed from FIG. 5 (a), and is supported by the transport roller 30. After that, the H-section steel 100 is laterally moved to the centering position CL by the centering means (not shown) as described above.

  In the reversing process by the turner 1 described above, the L-shaped frame 2 that supports the H-shaped steel can be moved in the horizontal direction perpendicular to the longitudinal direction of the H-shaped steel during the turning of the H-shaped steel. Therefore, the H-section steel does not move greatly in the horizontal direction along with the turning, and the H-section steel can be reversed in the press straightening machine 20, that is, can be turned 180 °. Moreover, since the horizontal direction position of the H-section steel after inversion can be made the same position as before inversion, it is also possible to further rotate the H-section steel.

  However, in the reversing process using only the turner 1, when the H-section steel 100 turns by its own weight and falls into the sub-arm 3B at the stage of FIG. 5 (f), the H-section steel 100 and the sub-arm 3B A collision or a collision between a longitudinal position other than an engagement position of the H-shaped steel 100 with the turner 1 and a member of the press straightening machine 20 occurs, and the impact of the collision may cause the H-shaped steel 100 to become wrinkled. There are not a few. Further, if the turner driver has a low level of skill, the frequency of occurrence of the fall will increase. If the H-shaped steel is often wrinkled during this reversal, the maintenance load for removing wrinkles in the subsequent process increases.

  Therefore, in the present invention, the H-section steel that is turning from the I position to the H position is supported by an auxiliary arm as a means for avoiding the fall of the H-section steel that is being reversed without depending on the skill level of the turner driver. An inversion auxiliary buffer 10 (see FIG. 1) for rotation is provided.

  FIG. 3 is a front view of the apparatus showing the mechanism of the auxiliary inversion buffer 10 in FIG. FIG. 4 is a front view of the reversing device showing a mechanism (mechanism) in which parts of the reversing device having the reversing auxiliary buffer 10 move in relation to each other. In FIG. 4, (a) is a standby state, and (b) is a working state. As shown in FIG. 3, the reversing auxiliary buffer 10 supports the auxiliary arm 11 so that the auxiliary arm 11 can turn with a turning shaft 12 fixed to the base 13, and one end of the link mechanism 15 is attached to one place in the length direction of the auxiliary arm 11. The other end of the link mechanism 15 is connected to the advance / retreat rod of the air cylinder 14. Thereby, the advancing / retreating movement of the advancing / retreating rod of the air cylinder 14 is converted into a turning movement of the auxiliary arm 11 via the link mechanism 15. The position of the turning shaft 12 was set to a centering position CL and a position lower than the upper end of the conveying roller 30. In the standby state, the auxiliary arm 11 is in the horizontal position.

  Regarding the operation of the reversing auxiliary buffer 10, the operator of the press straightening machine operates the reversing auxiliary buffer operating panel attached to the turner operating panel to adjust the air pressure of the air cylinder 14, thereby moving the auxiliary arm 11. Turn.

  FIG. 4 is a front view of the reversing device showing a turning process of the H-section steel from the I posture to the H posture using the reversing device according to the present invention. Note that the turning process from the H posture to the I posture is the same as (a) to (d) of FIG. 5 and does not fall down due to its own weight, so the inversion auxiliary buffer 10 may remain in the standby state.

  In the turning process from the I posture to the H posture, when the L-shaped frame 2 is rotated clockwise while moving leftward from the standby state as shown in FIG. 4A, FIG. As shown, the I-shaped H-section steel 100 turns clockwise as the bottom is gradually lifted by the main arm 3A. Before the transition from turning to falling (while the entire bottom surface of the H-shaped steel 100 is supported by the main arm 3A), the auxiliary arm 11 is turned counterclockwise as shown in FIG. The auxiliary arm 11 supports the H-shaped steel 100 from the right side. From this state, when the L-shaped frame 2 is rotated clockwise and the auxiliary arm 11 is turned clockwise, the H-shaped steel 100 is supported by the main arm 3A on one of the flanges and the auxiliary arm 11 on the other. As it turns around, the part which was supported by the auxiliary arm 11 as shown in FIG. That is, the fall of the H-section steel 100 as shown in FIG. Since the operation of turning the auxiliary arm 11 does not require much skill, according to the present invention, the fall can be avoided without depending on the skill level of the turner driver.

  Thereafter, the auxiliary arm 11 advances clockwise and returns to the standby state. The subsequent steps are the same as the steps from (g) to (h) in FIG. 5. Finally, as in FIG. 5 (h), the H-section steel 100 is as shown in FIG. 4 (d). 5 (a) shifts to an H posture in which left and right are reversed, and is supported by the transport roller 30.

  In this way, by using the reversing device according to the present invention, it is possible to avoid the H-section steel being reversed from falling by its own weight without depending on the skill level of the turner driver, and the H during reversing work can be avoided. It is possible to greatly reduce the impact of collision with the peripheral members of the shape steel, and to reduce the occurrence of wrinkles (called overturning wrinkles).

  The press straightening machine is used not only for bending but also for correcting warpage. The H-shaped steel at the time of warping correction is assumed to be in the I posture, but the warpage outward side (the side with the larger radius of curvature) and the inward warping side (the side with the smaller radius of curvature) are interchanged depending on the longitudinal position. In such a case, it is necessary to shift from the I posture to the I posture reversed left and right through the H posture. Also at this time, when turning from the I posture to the H posture, the turning device similar to that shown in FIG. 4 can be performed by using the reversing device according to the present invention, and the falling can be avoided.

  The present invention was applied to a cold press straightening process of H-shaped steel, and it was set as an example. The embodiment of the example is as described above. The size of the H-shaped steel to be corrected is H (web height) × B (flange width) = 250 mm × 250 mm to 1000 mm × 400 mm, and length = 6.0 to 30.0 m. Before the application of the present invention, a reversing device consisting only of a turner was used, and this was used as a comparative example.

  In the comparative example, with respect to the correction target material having H of 800 mm or more (the center of gravity in the I posture is relatively high and is likely to fall down), the number rate (falling wrinkle occurrence rate) Was 36%).

  On the other hand, in the Example, the incidence rate of overturning wrinkles was 12%, which was 24 points lower than the comparative example, and the effect of the present invention was manifested.

1 Turner 2 L-shaped frame 3 L-shaped corner 3A main arm (main arm of L-shaped corner)
3B Secondary arm (L-shaped corner secondary arm)
4 Cart 5 Air Cylinder 6 Air Cylinder 10 Reversal Auxiliary Buffer 11 Auxiliary Arm 12 Rotating Shaft 13 Base Base 14 Air Cylinder 15 Link Mechanism 20 Press Correction Machine 21 Supporting Die 22 Pushing Die 24 Pressing Direction 30 Conveying Roller 31 Conveying Direction 100 H Shape steel 101 Web 102 Flange

Claims (1)

  An H-section steel reversing device for turning an H-section steel in a press straightening machine from an H position to an inverted H position, or from an I position to an inverted I position. A turner configured to surround a half circumference with L-shaped corners of the L-shaped frame, rotate the L-shaped frame in a plane orthogonal to the H-shaped steel conveying direction, and move in the H-shaped steel conveying width direction; A reversing apparatus for H-section steel, comprising: a reversing auxiliary buffer for rotating the H-section steel in a turning state from the I position to the H position by supporting with an auxiliary arm.

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