JPS61283420A - Device for correcting bend of long-sized metallic material - Google Patents

Abstract

PURPOSE:To automatically and continuously correct the bend in the longitudinal direction of a long-sized metallic material at a high productivity by measuring said bend and pressing pressurizing members thereto to roll the material in accordance with the result of the measurement. CONSTITUTION:The bending amt. of the long-sized metallic material 1 having the bend is measured by a bend measuring instrument 3. The rolling reduction is determined by a control device in accordance with the result of the measurement and a rolling mill 3 consisting of rolling rollers 2A, 2B is controlled so that the material is subjected to local cross helical rolling. The inside of the bend is thereby rolled and extended to have the same length as the length on the outside of the bend, by which the bend is corrected. The acceptance or rejection of the corrected part is thereafter discriminated by a bend inspecting instrument 30 and the long-sized metallic material 10 of which the bend is corrected is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a bend correction device for a long metal material, and particularly to a bend correction device for a long metal material with excellent productivity.

[Background of the invention]

Conventional bending correction devices repeatedly perform bending by applying pressure between a plurality of straightening rolls, but this is limited to short objects, and it is difficult to correct large bends in long metal materials. It took a long time to fix.

In particular, for correcting bends in the width direction of elongated metal materials, simply pressing them with straightening rolls is not effective (Japanese Patent Publication No. 14285/1985).

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for correcting the bending of a long metal material, which is capable of automatically and continuously correcting the bend of a long metal material and has excellent productivity.

[Summary of the invention]

A ninth aspect of the present invention to achieve the above object is a bending measuring device for measuring the bending of a long metal material in the longitudinal direction.

a correction device that corrects the bending of the elongated metal material by pressing a pressure member against the elongated metal material, and a pressing amount of the pressure member of the correction device based on the measurement result by the bend measurement device. It was equipped with a control device for controlling the vehicle.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to FIGS. 1 to 5.

1 and 2 schematically show an apparatus for correcting the bending of a long metal material, and an example of a measuring apparatus for measuring the amount of bending will be described. The bending measuring device 3 measures the curved long metal material 1.
It is pressed against spring 3C. The structure of this bending measuring device 3 is such that the support rollers 3A and 3f3 are in contact with the end surface of the elongated metal material 1. These two support rows 23A and 3
A stylus 3D is provided between B and O, and the stylus 3D is always pressed against the end surface of the long metal material 1 by a built-in spring or the like. Since only one arc passes through the three points, the curved arc can be determined by determining the positional relationship between the three points of the stylus 3D using the support rollers 3A and 3B as references. Therefore, the support roller 3A,
3B is fixed, and the displacement of the stylus 3D is determined by the differential transformer 3.
The curvature of the long metal material 1 can be determined by extracting it as an electric signal using E or the like and performing calculations.

In this state, by repeatedly performing measurements and calculations while relatively moving the long metal material 1 or the bending measuring device 3, it is possible to continuously measure the amount of bending of each part of the long metal material 1. In this example, the stylus 3D is used to find the positional relationship of three points.
Although the length was measured by contacting the length, it is also possible to measure the length without contact using light, ultrasonic waves, laser, etc.

Further, the interval between the support rollers 3A and 3B that serves as a reference is arbitrary, and the interval is set narrow to obtain a local bend, and set wide to obtain a large overall bend.

The length of the measurement point is not limited to one between the support rollers 3A and 3B, but may be two or more, and the length may be measured at multiple points at the same time. It is also possible to fix both the metal material 11 and the bend measuring device 3 and measure the bend at once. At this time, by increasing the number of measurement points, it is possible to simultaneously measure the bending of each part.

Next, we will explain how to correct the bending based on the measured results and results of the bending. After measuring the amount of bending of the bent long metal material 1 with the surface measuring device 3, it is rolled by a rolling mill 2 having two rolling rows (2) and 2B according to the amount of bending. 1. Curvature is corrected by locally inclined rolling.

When the long metal material 1 is rolled, it undergoes plastic deformation and its thickness decreases, but since the volume is constant, the reduced thickness extends in the length direction. In other words, a curved state is a state in which the inside of the curve is shorter than the outside.

Therefore, by locally rolling the inside of a bend and stretching it until it has the same length as the outside of the bend, the lengths will be balanced and the bend can be corrected.

Based on the results of measuring 10 bends of long metal material Di with the bending measuring device 3, the amount of inclined rolling was determined using the inclined rolling data according to the flowchart shown in Fig. 3, and rolling by 22 rolling rowers was performed. Adjust amount.

Here, the outline of the structure of the rolling mill 2 will be explained with reference to FIG. The position of the upper rolling row 22 is determined from the inclined rolling amount of the long metal material 1 determined from the above inclined rolling data, that is, the mechanical properties of the long metal material 1 and the inclination amount α with respect to the plate thickness t. The rolling process is controlled and inclined rolling is carried out.

As a result, the side IP of the elongated metal material 1 with a larger rolling reduction amount has a larger amount of elongation in the longitudinal direction than the side IA with a smaller reduction amount. and,
Since the amount of inclined rolling is adjusted by the control device based on the inclined rolling data so that the curve De can be corrected, when the long metal material 1 is rolled by the single rolling mill 2, the bend is corrected and a second length metal material 10 is obtained. .

In addition, in this rolling mill 2, the rolling roll 2 is 2A.

Although it is a two-stage configuration of the B-type, it may also have a four-stage configuration in which the rolling blade is transmitted via a backup roll. In addition, the position control of the two upper rolling rolls is performed using hydraulic cylinders 21A and 21.
Although this was carried out in accordance with B, the position may also be controlled by the amount of rotation of the screws by utilizing the splitting properties of the device. Furthermore, the lowering blade P may be used instead of controlling the position of the upper rolling roll 2Aft.

The long metal piece 10 whose curvature has been corrected by the rolling mill 2 described above is re-measured for the amount of curvature by the 1-curve measuring device 30,
As shown in the flowchart shown in FIG. 3, if it is within the standard, the next position is continued to be corrected, and if it is not within the standard, it is corrected again to obtain a long metal material 10 without bending.

In this embodiment, the measurement and inspection of the amount of bending are performed separately, but the bending measuring device 30 is omitted and the rolling mill 2
After the bending is corrected, the corrected portion may be returned and measured by the bending measuring device 3.

Another example of bend correction rolling will be explained with reference to FIG. The bend correction device of this embodiment differs in the rolling mill 22. That is, the control device calculates the rolling reduction amount Δt (=t t2
) to determine. From this result, the hydraulic cylinders 21A, 2
1B, the bends are corrected by rolling the local IP of the long metal material 1 while controlling the positions of the two upper rolling rolls.

In addition, in this embodiment as well, a four-stage configuration may be used in which the rolling blade is transmitted to the rolling rolls 2A and 2B via a backup roll, and the position of the upper rolling roll 2N may be controlled by the amount of rotation of screws. .

Furthermore, the amount of rolling may be controlled by the rolling blade P instead of controlling the positions of the two upper rolling rolls.

Next, another embodiment of the bend correction device by rolling will be described with reference to FIGS. 6 to 8.

The principle of the bend correction device according to this embodiment will be explained with reference to FIG. This device utilizes the principle that when a force is applied to a material undergoing plastic deformation from another direction, the material deforms easily with a smaller force than when no rolling is performed.

In Fig. 6, a long metal material 1 having a bend is rolled in a rolling machine 1.
When rolling by 2, 12 people roll the roll.

The portion IB sandwiched between 12B is crushed and plastically deformed. This plastic deformation is a deformation in which the plate thickness decreases and extends in the longitudinal direction. Here, when a bending moment M is applied to the guide 5 provided on the exit side, the left and right elongation t' in the longitudinal direction is adjusted or reduced in the portion IB which is plastically deformed due to rolling and is deformed to elongate in the longitudinal direction. Work like. Therefore,
By controlling and applying the bending moment M applied to the guide 5 in accordance with the bending tK, the bending can be corrected.

Next, bend correction will be explained with reference to FIGS. 7 and 8.

The bending force of the long metal material 1 having a bend is measured by the bending force measuring device 3 (
Based on this measurement result, the control device determines the bending moment data to be applied using the bending moment data as shown in FIG.

A long metal material 1 is rolled by a rolling mill 12 by a small amount.

The long metal material 9 that has been rolled in a minute amount is bent by a guide 5 consisting of guide rollers 5A and 5B provided on the exit side in a direction that cancels out the oiliness of the metal material 9. The bent metal material 10 is obtained by correcting the bending. Based on the ethics shown in FIG.
0, the bend 9 is measured, and if it is within the standard, the bend 1j of the next part is corrected, and if it is not within the standard 1 It will be 10 pieces.

Note that in this embodiment, the guide roller 5BFi is provided with a front attachment, but the guide roller 5BFi may not have a groove. Furthermore, the five guide rollers may also be provided with grooves. In addition, the guide roller 5A
Although I explained that 5 fl should be used on the metal side, it is also possible to use a straight guide instead of a roller.

Further, although the guide 5 has been described as being open on both sides, if the guide 5 is open on only one side, one of the guides may be omitted.

In this embodiment as well, as in the previous embodiment, the bending inspection device fVt30 is omitted, and after the bending correction work is completed, the metal material 10 is
Alternatively, the bending measurement device 3 may be used to perform the measurement after the bending is returned.

Each of the above embodiments has been described using the long metal material 1 with a T-shaped cross section as an example, but the cross-sectional shape is not limited to a single-shaped shape, and the cross-sectional shape is uniform, such as an L-shape or a square shape. It is sufficient to use W steel metal material.

By the way, the present invention can be applied not only to shaped steel but also to long metal materials such as steel bars and flat steel.

Furthermore, after performing the bending correction work as shown in the details of Fig. 3 and Fig. 8, the bending is measured by the bending measuring device 30. It is possible to further reduce the correction error of the bending matrix depending on the lot of metal material, and to reduce the error in re-alignment.

〔Effect of the invention〕

According to the present invention, a long metal material can be continuously and automatically bent (
Since C can be measured and corrected, bending correction can be performed accurately and at high speed, and productivity can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing a bending correction device according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. Figure 4 is a cross-sectional view showing the rolling mill part of Figure @1, Figure 5 is a cross-sectional view showing the rolling mill part of the bending correction device according to another embodiment of the present invention, and Figure 6 is a cross-sectional view showing the rolling mill part of the bending correction device according to another embodiment of the present invention. FIG. 7 is a schematic side view showing an embodiment of the bend correction device, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a flowchart showing the logical configuration of the device of FIG. 6. 1... Long metal material, 2.12... Rolling machine, 2A, 2
B. 12A, 12B...Rolling mill roller, 3...Bending measuring device 0... Long metal material after bending correction, 30... Measuring device. 30 tuna 6 tuna 70

Claims (1)

[Scope of Claims] 1. A bending measuring device that measures the bending of a long metal material in the longitudinal direction, and a correction device that corrects the bending of the long metal material by pressing a pressure member against the long metal material. and a control device that determines the amount of correction based on the measurement result by the bending measuring device and controls the amount of pressing of the pressure member of the bending device. 2. The device for correcting the bending of a long metal material according to claim 1, wherein the pressure member includes at least a pair of rolling rollers. 3. The device for correcting the bending of a long metal material according to claim 1, characterized in that the correction device includes a rolling device and a guide that applies a bending moment to the long metal material being rolled. . 4. A bending measuring device that measures the bending of a long metal material in the longitudinal direction; a correction device that presses a pressure member against the long metal material to correct the bending of the long metal material; and the bending measuring device a control device that determines the amount of correction based on the measurement result of the correction device and controls the pressing amount of the pressure member of the correction device; an inspection device that measures the correction portion of the long metal material; and an inspection device that measures the correction portion of the long metal material; 1. A bend correction device for a long metal material, comprising a determination device that determines whether or not the correction is successful based on measurement results. 5. In claim 4, the control device has a function of comparing the determination result of the determination device with the correction amount and giving a correction amount correction instruction to the correction device. A device for correcting the bending of long metal materials.