JPS5861921A - Straightening method and apparatus for flattening of running strip - Google Patents

Abstract

PURPOSE:To flatten and straighten a metallic strip and to pervent occurrence of scratches in a heat treatment furnace, by forming a corrugated part extending in the direction of width intermittently in the running direction of a running metallic strip and then introducting into the heat treatment furnace. CONSTITUTION:A flattening and straightening device 2 for a metallic strip 84 is installed in the downstream of a bridle roll 86 and the metallic strip 84 is run between two work rolls 70, 70 in the upper part of the device 2 and a work roll 72 in the lower part. The work roll 72 is positioned on arms 60, 30, and the work rolls 70, 70 are lowered by operation of hydraulic cylinders 52, 22 through bearing blocks 48, 18 to clip the metallic strip 86, and a convex stripe 88 having arcuate section is formed in the direction of width of the plate. The metallic strip 84 on which such convex stripe 88 is formed intermittently in the direction of running and flattened is let to a continuous heat treatment furnace 82 of hot air blasting system.

Description

[Detailed Description of the Invention] The present invention relates to a method and apparatus for flattening and straightening an IJ knob, and particularly relates to a flattening straightening method and device for flattening an IJ knob. The present invention relates to a method and apparatus that can effectively prevent scratches caused by contact between the strips.

Conventionally, hot air blowing is a method in which a predetermined metal strip is continuously run in a non-contact state in a heat treatment furnace, and a predetermined heat treatment is performed there. Due to curling, warping, or distortion, the strip often comes into contact with a hot air jet nozzle or the like in the furnace, resulting in scratches, which often reduces the commercial value of the strip. In particular, if the thickness of the IJ strip is within a certain range, the warpage and distortion of the strip will remain uncorrected even by the leveler passed upstream of the heat treatment furnace, and Since the IJ tube is not straightened even by the hot air ejected from the furnace, the warpage and distortion of the IJ tube during travel in the furnace causes it to come into contact with the hot air jet nozzle, etc. inside the furnace, thereby preventing the occurrence of scratches. Therefore, the appearance was poor, and the product value was severely reduced.

The present invention has been made in view of the above circumstances, and is capable of effectively preventing the occurrence of scratches on a metal strip that is continuously run in a heat treatment furnace. The purpose of the present invention is to provide a method and device for straightening pimples. After being formed intermittently in the running direction, it is introduced into the heat treatment furnace.

Furthermore, in order to effectively carry out such a straightening method, the present invention provides that the strip is
n first rolls arranged in parallel in the width direction of the IJ tube, and n first rolls arranged in the width direction of the strip so as to be located between the rolls of the first rolls on the other side of the strip. n-1) second rolls, and the strip is pressed between the first roll and the second roll to give the strip a wave-shaped portion extending in the width direction; A device is used that includes a pressing mechanism that causes an intermittent pressing action between the first roll and the second roll.

Thus, according to the present invention, corrugated portions (corrugated portions) extending in the width direction are intermittently formed on the running strip as it is guided into the furnace. This method effectively prevents the occurrence of scratches even for IJ tubes whose thickness range makes it unsuitable for use in the furnace due to scratches occurring in the furnace due to strain, etc. -1. This made it possible to use the heat treatment furnace, and there was no fear that the product value would decrease as a result.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A more detailed explanation will be given below based on the drawings showing an apparatus that can be suitably used for carrying out the present invention.

First, the flattening correction device 2 shown in FIGS. 1 and 2 is
(S) A set of stands 4 and 6 erected on both sides of the IJ tube running path are connected by four pipe-shaped stays 8 to form a frame.

As shown in FIG. 1, the stand 4 is constructed by combining an upper frame to, a lower frame 12, and side frames 14 and 14 on both sides as a frame. Guide members 16 are provided inside the upper part of the frame 14 so as to face each other in the vertical direction, and grooves on both left and right edges of the bearing block 18 are fitted into the guide members 16. The north end 20 of the upper frame 10 is connected to a hydraulic cylinder 22 (pressing mechanism) fixed to the surface of the upper frame 10, so that the bearing block 18 is caused to slide up and down along the guide member 16 by expansion and contraction of the hydraulic cylinder 22. It has become.

Further, guide members 26 are provided inside the lower part of the frame 14 so as to face each other in the vertical direction, and gate structures on both left and right edges of the arm 30 that supports the bearing block 28 are fitted into the guide members 26. The lower end portion 34 of the arm 30 is connected to a worm jack 82 fixed to the surface K of the lower frame 12, and the worm jack 3
The arm 30 is made to slide up and down along the guide plate 26 by the expansion and contraction of the arm 30.

On the other hand, the stand 6 also has one part frame 40. Lower frame 42. Side frame 44.
44, and a guide member 4 is provided inside the upper part of the frame 44.
6 are provided with guide members 56 facing each other inside the lower part, the upper bearing block 48 is fitted into the guide member 46, and the arm 60 supporting the lower bearing block 58 is fitted into the guide member 56. The end portion 50 of the bearing block 48 is connected to a hydraulic cylinder 52 (pressing mechanism) fixed to the upper surface of the upper frame 40, and the expansion and contraction of the hydraulic cylinder 52 causes the bearing block 48 to press against the guide member 46.
It is designed to be slid up and down along the Further, a lower end portion 64 of the arm 60 is connected to a worm jack 62 fixed to the upper surface of the lower frame 42, and the arm 60 is made to slide up and down along the guide plate 56 by expansion and contraction of the worm jack 62. .

Then, two upper work rolls 7 arranged in parallel
0.70 (first roll) is rotatably supported by the bearing block 18 of one stand 4 and the bearing block 48 of the other stand 6 at its small diameter portions at both ends, and the two work rolls are '10. One work roll 72 positioned between '10' and '10' below
(Second roll) is similarly rotatably supported by bearing blocks 28 and 58.

Further, the motor 74 with a reducer fixed to the lower frame 12 of the stand 4 has its extension shaft 76 extended to the lower frame 42 of the stand 6 and is pivotally supported, and the sprocket 74 is
8 and chain 80 to connect worm jacks 32 and 6.
The bearing blocks 28 and 58, and ultimately the work roll 72, can be positioned by driving the arms f30 and f30 and lowering the arms f30 and f60 by the same amount at the same time.

As shown in FIG. 3, the flattening or straightening device 2 having such a configuration is installed on the upstream side of a continuous heat treatment furnace 82 in which hot air is blown, and on the traveling stage). It is arranged downstream of the roll roll 86.

The metal strip 84 that is run here is, for example, an aluminum plate or an aluminum alloy plate, and the plate thickness is 0.3~
The width of the 5InI111 plate is about 600 to 2500InI11, and it is run at a line speed of about 100 m/min. The running strip 84 has a fifth
Usually, a large deflection in the width direction of the plate as shown in the figure occurs. Since this deflection comes into contact with the heat treatment furnace 82 or the nozzles in the furnace and causes scratches, as a means to prevent this, according to the present invention, the strip 84 is provided with a corrugated shape extending in its width direction. Shape part (
After the corrugated convex portions 88 are formed intermittently in the running direction, they are introduced into the heat treatment furnace 82. More specifically, the material of the strip 84.

Pressure oil is simultaneously supplied to the hydraulic cylinders 22 and 52 at a predetermined interval, such as once every second or once every five seconds, depending on the properties such as the thickness of the plate. As the blocks 18.48 are guided by guide members 16.46 and lowered, the two work rolls 70 are also lowered parallel to each other, and between them and one work roll 72 positioned below, The strip 84 is compressed to form a convex strip 8 having an arcuate cross section on the IJ knob 84.
8 is formed in the board width direction.

By forming such protrusions (corrugates) 88 intermittently in the width direction of the IJ tube 84, warpage or deflection as shown in FIG. 5 is present.
The IJ knob 84 will receive an effective flattening effect.

Note that the lower work roll 72 has been positioned at a predetermined position in advance. That is, the worm jacks 32 and 62 are simultaneously raised and lowered by the same amount by the motor 74 with a reduction gear, and the arms 30 and 60 are raised and lowered while being guided by the guide members 26 and 56, respectively. Then, the work roll 72 is positioned at a predetermined position.

As shown in FIG. 4, by providing the protrusions 88 in the width direction of the metal strip 84 at predetermined intervals, the occurrence of deflection that could not be avoided in the past can be effectively prevented. It became possible to do so.

Therefore, the possibility of causing contact scratches when the metal IJ tube 84 passes through the inlet of the heat treatment 82 or inside the furnace is completely eliminated. In addition, the provided protrusions 88 are stretched while being heated under a predetermined tension in the heat treatment furnace 82, and the shape of the protrusions 88 is substantially eliminated, and the metal IJ tube 84 is When leaving the heat treatment furnace 82, the straightening device 2 restores the shape of the flat IJ tube before the protrusion 88 is applied.

In this way, the metal strip 84 is prevented from scratching all of the plates IJ within its range of use, and the risk of a decrease in commercial value due to the application of the hot air blowing type heat treatment furnace 82 is completely eliminated.

In addition, in the straightening device according to the present invention for upper peeling, the most common example is shown in which embossing is performed by two upper work rolls 70 and one lower work roll 72.
The present invention is not necessarily limited to this, and may be a combination of one upper work roll and two lower work rolls, and generally n (n≧2) rolls and (n
-1) A combination of individual rolls is fine, and even if the lower roll is raised and lowered relative to the upper roll for embossing, or both are raised and lowered at the same time, There is no problem.

Therefore, the shape of the die pressed by the roll is not only a single protrusion, but also multiple protrusions may be formed at the same time, and it is not possible to form protrusions one after another by intermittent embossing operations. This may be necessary in some cases, and therefore, it is generally sufficient that one wave-shaped waveform is formed intermittently at predetermined intervals in the running direction.

In addition, it goes without saying that various modifications and improvements can be made to the present invention based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a city view of an apparatus suitably used for carrying out the method for flattening and straightening a traveling strip according to the present invention, and FIG. 2 is a cross-sectional view of the apparatus shown in FIG. FIG. 3 is an explanatory diagram of the arrangement of the device in a continuous heat treatment line,
FIG. 4 is a perspective view showing the shape of the metal strip before and after embossing with the correction device, and FIG.
FIG. 2: Flattening straightening device 22. 52: Hydraulic cylinder 70: Work roll (first roll) 72: Work roll (second roll) 84: Metal strip 88: Convex strip (corrugated portion) Applicant: Sumitomo Light Metal Industries, Ltd. Co., Ltd.

Claims (2)

[Claims] (1) Metallic parts that are made to run continuously into a predetermined heat treatment furnace) A corrugated portion extending in the width direction of the IJ tube is intermittently formed in the running direction, and then guided into the heat treatment furnace. IJ
Method for flattening and correcting swelling. (2) n first rolls arranged in parallel in the width direction of the IJ tube on one side of the running strip; and n first rolls on the other side of the IJ tube. (n-1) second rolls arranged in the width direction of the strip so as to be located between the rolls; and sandwiching the strip between the first roll and the second roll, It is characterized by including a pressing mechanism that causes an intermittent pressing action between the first roll and the second roll so as to impart a wave-shaped portion extending in the width direction to the strip. Flattening straightening device for running strips.