JPS5925536Y2 - Warp correction device for steel plates, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for correcting the warpage of the tip of a steel plate, and in particular, between the rollers forming a roller table, an inclined surface is provided which is inclined downwardly along the transfer direction of the roller table. A straightening surface plate is provided, and the inclination angle of the straightening surface plate is adjusted by a straightening surface plate position adjusting means according to the amount of upward curvature of the steel plate, and a first fluid pressure cylinder moves the straightening roller to the tip of the steel plate. The steel plate is configured to correct the warpage of the steel plate by guiding and moving the straightening roller in the pressure contact state along the straightening surface plate by the second fluid pressure cylinder while being pressed against the top in the direction of gravity. The present invention relates to a steel plate warp correction device that can remove the stress caused by the warpage without leaving any residual stress, and can reliably straighten the steel plate regardless of the degree of warpage.

The warping deformation that often occurs at the tip of a steel plate during thick plate or hot-stop rolling processes can cause problems in subsequent processing steps, such as the steel plate cooling and quenching process. It has been adopted.

The known curvature correction device used in this curvature correction process has one end of a hydraulic cylinder and a guide arm pivotally connected to a human-like support structure that extends above the transfer surface (pass line) of the steel plate. A straightening roller is pivotally supported at the other end of these for correction.

The length of the guide arm of this straightening device is set to a length that can press against the upper surface of the steel plate at most, so the warped part of the steel plate can only be pushed down to the horizontal transfer surface, so the warped part can be corrected sufficiently. I couldn't do it.

Even with the use of this known straightening device, it was still necessary to provide a leveler for re-straightening in case of problems in subsequent processing steps.

As described above, the ability of the known orthodontic devices to correct upward curvature is still insufficient, and the development of a correction device that has sufficient ability to correct upward curvature has been long-awaited. This is the invention.

The object of the present invention is to adjust the inclination angle of a straightening surface plate having an inclined surface inclined downwardly along the transfer direction of the roller table using a straightening surface plate position adjusting means according to the amount of warping of the steel plate, etc. By configuring the steel plate to be straightened by a straightening roller that is moved in pressure contact with the adjusted straightening surface plate by the first and second fluid pressure cylinders, the steel plate can be reliably straightened regardless of the amount of warpage, etc. The object of the present invention is to provide a device for correcting the warpage of a steel plate.

According to the present invention, the stress that causes upward warping that would remain if the pressure is applied only to the transfer surface is suppressed by applying the stress to the bottom of the transfer surface along the straightening surface plate whose position is adjustable at the tip of the upward warpage. This is eliminated as much as possible by applying a bending action.

Therefore, the amount of warpage of the steel sheet corrected by the device of the present invention is almost eliminated or can be kept within tolerable limits.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

゛FIG. 1 shows an upward warpage correction device 1 according to a first embodiment of the present invention, in which a correction roller 2 is attached to a steel plate 3.
It shows a state in which it is retracted above the transfer surface 4.

Each rotating shaft end of the straightening roller 2 of the upward warpage straightening device 1 is pivotally supported to a drive mechanism 5 via a link mechanism 2', and the drive mechanism is controlled by a control device 6-1 (see FIG. 2) to control the straightening roller 2. In step 2, the pressing operation as described below is repeated.

The transfer surface 4 is formed by a plane connecting the vertices of each roller of the roller table 7.

A predetermined roller 7a of this roller table 7.

A correction surface plate 8a having an inclined surface of an appropriate curvature machined from the transfer surface 4 along the transfer direction of the roller table 7 is provided between the transfer surfaces 7a.

The straightening surface plate 8a supports the back surface of the tip end of the steel plate 5, and the upper surface of the straightening surface plate 8a on the downstream side in the transfer direction is separated from the transfer surface 4 by a distance n.

The lower end of the straightening surface plate on the upstream side in the transport direction is pivotally supported by a link mechanism 8b, and on the downstream side there is provided an adjuster 8C that can adjust its height by inserting and removing shims, etc., and the distance n can be freely widened or narrowed. That is, the angle of inclination of the inclined surface of the correction surface plate 8a can be changed as appropriate.

The link mechanism 8b and the adjuster 8C constitute a correction surface plate position adjusting means, and the correction surface plate mechanism 8 is constituted by this and the correction surface plate 8a.

- The straightening roller 2, the drive mechanism (hydraulic cylinder) 5, the control device 6-1, the roller table 7, and the straightening surface plate mechanism 8, constructed as described above, are the main components of the apparatus of the present invention.

In the embodiment shown in FIG. 1, the drive mechanism 5 consists of a pair of vertical hydraulic cylinders 5■ serving as a first hydraulic cylinder and a horizontal hydraulic cylinder 5H serving as a second hydraulic cylinder. Only one is shown in FIG. 1; the other is on the other side of the roller table 7 and is not explicitly shown.

Each of the other hydraulic cylinders is constructed and controlled in exactly the same manner as the one hydraulic cylinder described below.

The lower end 5V1 of the vertical hydraulic cylinder 5■ is behind the straightening surface plate mechanism 8 in the transfer direction and is pivotally connected below the roller table 7, for example, via a link mechanism 5V2, while its upper end, that is, the piston rod The tip end 5V4 of 5V3 pivotally supports the rotating shaft end of the correction roller 2 via, for example, a link mechanism 2'.

Oil supply and drainage pipes 5V5 and 5V6 are connected to the hydraulic cylinder 5■ to the subsequent control device 6-1.

A vertical hydraulic cylinder located on the opposite side of the roller table 7 is also controlled by this control device 61.

The lower end 5H1 of the horizontal hydraulic cylinder 5H is pivoted in front of the straightening surface plate mechanism 8 in the transport direction and below the roller table 7 via, for example, a link mechanism 5H2, while its upper end, that is, the piston rod 5H3 The distal end portion 5H4 pivotally supports the rotating shaft end of the forcing roller 2 via, for example, a link mechanism 2'.

The hydraulic cylinder 5H is connected to a control device 6-1, which will be described later, through oil supply and drainage pipes 5H5 and 5H6.

A horizontal hydraulic cylinder located on the opposite side of the roller table 7 is also controlled by this control device 6-1.

The control device 6-1 includes an automatic switching valve, such as an electromagnetic switching valve 6■a, which communicates with a hydraulic system (not shown), and a flow rate control valve whose one valve port communicates with one outlet port I/6Val of the electromagnetic switching valve 6Va. 6Vb, the above-mentioned oil supply/drainage pipe 5V5 communicating with the other valve port of the flow control valve 6vb, the corresponding oil supply/drainage pipe of the vertical hydraulic cylinder located on the other side of the roller table, which is not clearly shown, and the other side of the switching valve 5Va. From the control means 6Vc that controls the above-mentioned oil supply and drainage pipe 5V6 communicating with the outlet port 6Va2 and the corresponding oil supply and drainage pipe of the vertical hydraulic cylinder on the other side of the roller table 7, as well as the flow rate control valve 6Vb. A control portion 6V for the hydraulic cylinder is configured, and a control portion 6H for the horizontal hydraulic cylinder 5H may also have the same configuration, and each component can be referred to by replacing ■ with H, so the illustration is similar. and explanation will be omitted.

The control means 6Vc and 5Hc are controlled by determining the distance between the pivot point of the vertical hydraulic cylinder 5■, the pivot point of the horizontal hydraulic cylinder 5H, and the pivot point when the straightening roller is pressed against a steel plate or the like. In addition to the distance between the pivot points of both cylinders, the curve determined by the straightening surface plate and the speed of the straightening roller 2 are also included in the control parameters, and these values vary for each device. Therefore, the flow control valves 6vb and 5Hb are controlled by the control means 6vC and 5Hc while maintaining the straightening roller 2 perpendicular to the plane perpendicular to the transport direction, as described later. , the operation of moving this in a loop is repeated, and during this operation, the straightening roller 2 is constantly pressed during its movement in the horizontal direction and during its movement along the surface of the straightening surface plate. Suffice it to say that both flow control valves are controlled so that pressure is applied from the straightening roller 2 to the upper surface of the steel plate.

The operation and function of the upward curvature correction device 1 of the present invention constructed as described above will be explained below.

Now, the straightening process for the preceding steel plate has been completed, and the straightening roller has retreated to the position shown in Figure 1, where the warped steel plate 3 that has been processed by the rolling mill etc. is placed as shown in the figure. Assume that it was brought in as follows.

First, based on the amount of warping of the steel plate 3 brought in, the thickness and width of the steel plate 3, or the values of temperature, rigidity, etc.
The inclination angle of the correction surface plate 8a is set to an appropriate value by the adjuster 8C.

Next, in order to perform upward warpage correction treatment on this steel plate 3,
The control means 5Vc operates to move the piston rod 5V3 of the vertical hydraulic cylinder 5v into the cylinder 5■ while keeping the piston rod 5H3 of the horizontal hydraulic cylinder 5H at the upper stroke end, and the electromagnetic switching valve 6■ , and oil pressure from the hydraulic system is supplied to the hydraulic cylinder 5V through the oil supply/drain pipe 5V6.

Then, the straightening roller 2 descends onto the steel plate 3 while drawing an arc centered on the pivot point of the horizontal hydraulic cylinder 5H (see FIG. 3).

In order to avoid the descending straightening roller 2 colliding with the steel plate 3, the discharge flow rate from the flow control valve 6vb is reduced by the control means 6Vc while the straightening roller 2 is approaching the steel plate 3.

When pressed together, the piston of the piston rod 5V3 is slightly away from the lower stroke end.

In this way, the straightening roller 2 that has come into pressure contact with the steel plate 3 has its axis perpendicular to the plane perpendicular to the conveying direction.
In order to advance horizontally to the starting end of the correction surface plate while maintaining the pressure contact state, the vertical hydraulic cylinder 5■ is input in advance to these control means by the control means 6Vc and 6Hc.
The distance between the pivot point of the horizontal hydraulic cylinder 5H and the axis of the straightening roller 2, the distance between the pivot point of the hydraulic cylinder 5v and the pivot point of the hydraulic cylinder 5H, and the distance between the pivot point of the horizontal hydraulic cylinder 5H and the axis of the straightening roller 2; Using the speed information of the roller 2, the adjustment of the flow rate control valve 6Vb and the switching of the electromagnetic switching valve, as well as the switching of the electromagnetic switching valve 5Ha and the adjustment of the flow rate control valve, are performed appropriately in parallel (see Fig. 4). .

When the horizontal pressing operation under such control is completed, that is, when the straightening roller 2 reaches the starting end of the straightening surface plate 8a, the pressing operation of the straightening roller 2 starts from the horizontal direction.
It is switched to a curve determined by the inclination of the correction surface plate 8a.

This curve is selected according to the degree of curvature.

In addition to the above-mentioned control information for the control, the curvature of the correction surface plate surface is inputted in advance to the control means 6Hc and 6C, and the above-mentioned inclination amount is inputted to these control means from the adjuster 8C. .

These control information are used by the control means 6Vc and 6HC to continuously perform throttling control of the flow rate regulating valves 6Vb and 6Hb, thereby moving the forcing roller 2 along the above-mentioned curve.

If only one point of the tip of the steel plate is pressed up to the transfer surface with a forcing roller as in the past, it is not possible to prevent springback due to residual stress inside the steel plate when the forcing roller is removed.

However, FIG. 4 shows the state when the straightening roller 2 has completed its movement along such a curve.

In FIG. 4, the two-dot chain line indicates the main position of the correction roller 2 within the path drawn by the forcing roller 2 (the one-dot chain line).

When the straightening roller 2 reaches the state shown in FIG. 4, the piston of the piston rod 5H3 of the horizontal hydraulic cylinder 5H is located at approximately the lower stroke end, and the piston of the piston rod 5V3 of the vertical hydraulic cylinder 5V is located a little further away from the bottom stroke end.

When the pressing operation along the above-mentioned curve is completed, only the vertical hydraulic cylinder 5■ is operated and the horizontal hydraulic cylinder 5H is operated.
The straightening roller 2 is raised along an arc with its pivot point as the center of the circle (see Figure 5), and then only the horizontal hydraulic cylinder 5H is operated, and the vertical hydraulic cylinder 5 The straightening roller 2 is raised along an arc with the pivot point as the center of the circle, and returns to its retracted position (see FIG. 1).

As mentioned above, the straightening roller applies an appropriate bending action to the warped portion of the steel plate according to the degree of warping, and is located below the conveying surface and follows the downward curve determined by the warping, so it simply presses against the conveying surface. Since the stress that may remain in the straightening process can be appropriately removed, the amount of warpage after the straightening process is completely eliminated or is well within the allowable limits.

Next, a second embodiment will be described with reference to FIGS. 6 and 7.

In this embodiment, the hydraulic cylinders are fixed, and a roller table 7 is sandwiched between a pair of hydraulic cylinders 5.
FV and 5FH and corresponding hydraulic cylinders (not shown) located on the other side of the roller table 7 are used.

Hereinafter, like the first embodiment, only 5FV and 5FH will be explained.

- 5FV has a sliding member 5FV2 fixed to its lower end 5FV1, and a reinforcing member 5FV3 fixed between the member 5FV2 and the cylinder wall of the hydraulic cylinder 5FV.

The cylinder rod 5FV4 is connected to the straightening roller 2 via a link mechanism 2'.

The member 5FV2 is arranged within the guide member 9 and is moved left and right therein by a hydraulic cylinder 5FH.

The piston rod 5FH1 of 5FH is fixed to the cylinder wall of 5FV.

5FH2 and 5FH3 are support members for the hydraulic cylinder 5FH.

The other components in this embodiment have the same configuration as in the first embodiment, and the same numbers are given to these components, and detailed descriptions thereof will not be repeated to the extent possible.

Since the configuration of the control device 6-2 (not shown) in this embodiment is the same as that for the vertical hydraulic cylinder 5■ in FIG. 2, FV or FH is used instead of the letter ■. The control device 6-2 in this embodiment will be explained with reference to FIG.

The closed-loop movement control of the straightening roller 2 in this embodiment is basically the same as the movement control in the first embodiment.

That is, the difference is only in the control parameters resulting from the difference in the installation positional relationship of the cylinders 5FV and 5FH from the first embodiment, and accordingly, the adjustment of the flow rate control valves 5FVb and 5FHb is different.

Although such a difference in control occurs, the correction roller 2
The movement, especially the movement during the pressure welding operation, is exactly the same as in the first embodiment.

In the second embodiment, the hydraulic cylinder 5FV is movable and the hydraulic cylinder 5FH is fixedly supported. Those skilled in the art will readily be able to construct the same.

In the above embodiment, in order to prevent the straightening roller from colliding with the upper surface of the steel plate, the flow rate was controlled to the hydraulic cylinder, but the same effect can be obtained by providing a cushion mechanism at the stroke end of the hydraulic cylinder.

Furthermore, in any of the above embodiments, it is the intention of the present invention to increase the number of hydraulic cylinders, and it is of course possible to replace the hydraulic cylinders with other reciprocating mechanisms, such as pneumatic ones. be.

Furthermore, it is clear from the gist of the present invention described above that configuring such a reciprocating mechanism above the roller table does not deviate from the spirit of the present invention.

As is clear from the above explanation, according to the present invention, the pressing operation of the straightening roller against the steel plate is not simply regarded as the transfer surface, but is The inclined surface of the straightening surface plate is adjusted by the straightening surface plate position adjusting means according to the amount of upward curvature of the steel plate, etc., and the tip of the steel plate is pressed against the inclined surface by first and second fluid pressure cylinders. Since the steel sheet was straightened using a straightening roller, the amount of warp in the steel sheet could be completely eliminated or successfully brought within the permissible limit.

Therefore, the steel plate can be immediately sent to the steel plate cooling and quenching process without requiring a conventional leveler.

The correction ability of the curvature correcting device of the present invention is improved accordingly.

Since a leveler is not required, the processing steps can be simplified accordingly.

When each of the fluid cylinders is placed at the lower end of the roller table, a sturdy support structure for the fluid cylinders is no longer required, and the warp straightening device can be made more compact. They are less susceptible to the large amount of heat released.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the first embodiment of the present invention, and FIG. 2 is a diagram showing the first embodiment of the present invention.
Figures 3, 4 and 5 are diagrams sequentially showing the operation process of the first embodiment, and Figure 6 is a diagram showing the configuration of the control device used in the embodiment of the present invention. FIG. 7 is a front view of the embodiment device, and FIG. 7 is a partial side view of FIG. 6. In the figure, 1 is the warp correction device of the present invention, 2 is a straightening roller, 3 is a steel plate, 4 is a transfer surface, 5V, 5FV are vertical hydraulic cylinders (first fluid pressure cylinders), 5H, 5FH are horizontal hydraulic cylinder (second fluid pressure cylinder), 7 is a roller table, 7a is a roller, 8a is a correction surface plate, 8b
, 8C is a correction surface plate position adjusting means.

Claims (1)

[Scope of utility model registration request] When a steel plate processed by a rolling mill or the like is transferred by a roller table, a device for correcting the warping of the tip of the steel plate to be transferred is provided between the rollers forming the roller table, and is provided between the rollers forming the roller table. a straightening surface plate having an inclined surface descending along the transport direction of the roller table in order to support and guide the back surface of the roller table below the transport surface of the roller table; and an upstream side of the straightening surface plate in the transport direction of the roller table. a correction surface plate position adjusting means whose lower end is pivoted and whose downstream side is moved up and down to adjust the inclination angle of the inclined surface; a correction roller provided above the roller table; and a correction roller that moves the roller up and down. a first fluid pressure cylinder that is freely supported and presses the top of the steel plate transferred onto the roller table in the direction of gravity; and the correction that presses the top of the steel plate with the first fluid pressure cylinder. and a second fluid pressure cylinder for moving the roller in the direction of transport of the steel plate and guiding it onto the straightening surface plate.