JPH02280917A - Device for straightening camber in clad steel sheet - Google Patents

Abstract

PURPOSE:To easily straighten the camber in the width direction by vertically arranging a group of rolls composed of plural rolled down rolls having a projecting crown on the outside periphery and giving a reverse plastic bending having a prescribed curvature in the width direction of a steel sheet to a clad steel sheet. CONSTITUTION:The shape of the steel sheet before straightened is measured manually or automatically and a necessary reverse bending curvature is operated from this measurement information and steel sheet size information. Each rolling down roll 1 can adjust vertical position independently of the steel sheet. A driving motor of a worm jack 3A is kept under control by curvature, sheet thickness, sheet width, etc., obtained from the operation to determine the vertical position of each rolling down roll 1. These rolls are provided vertically and in zigzag on both sides of the carrier path of the steel sheet in the width direction of the steel sheet and arranged at the constant curvature opposite to the sheet shape before straightened. While a reverse plastic deformation is given in the width direction of the steel sheet, the steel sheet is drawn or delivered. After the steel sheet passes through, the shape of the steel sheet is measured and when it is suitable, each rolling down roll 1 is opened and when it is unsuitable, another straightening is carried out by a reverse pass, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a warpage straightening machine for clad steel plates.

[Prior art and problems to be solved by the present invention] When a clad steel plate made by stacking and bonding two or more metals is hot-rolled and then cooled, due to the difference in linear expansion coefficient of the materials, the cladding steel plate changes in the longitudinal direction and width. Since a warp occurs in the direction, it is necessary to correct this warp.

Conventionally, there are the following methods for straightening steel sheets, but each method has its own problems.

(i) Straightening method by applying repeated bending using a roller leveler Although it is easy to straighten clad steel sheet warpage in the longitudinal direction,
It is difficult to correct warpage in the width direction of a clad steel plate. Also,
By subjecting the clad steel plate to repeated bending, the adhesive strength between dissimilar metals decreases. For this reason, it is impossible to use a roller leveler in cold conditions on titanium clad steel sheets.

(ii) Straightening method in which the work of locally bending is repeated using a press It takes 5 to 8 hours to straighten a single clad steel plate, and requires a skilled worker. Furthermore, the thickness is 8■
A thin plate of about ■ cannot be corrected.

This invention was made to solve the above-mentioned problems, and its purpose is to provide a clad steel plate that can easily correct warpage in the width direction of a clad steel plate without reducing the adhesive strength between dissimilar metals of the clad steel plate. The purpose of the present invention is to provide a warpage straightening machine for steel plates.

[Means to solve the problem]

In the present invention, a roll group 2 formed by rolling down rolls 1 having a convex crown on the outer periphery and disposed at intervals in the width direction of the clad steel sheet W is placed between the clad steel sheet Provided in a staggered manner up and down in the width direction of the
The vertical position of each reduction roll 1 can be adjusted independently with respect to the clad steel plate W.

As the vertical position adjustment device 3, a nut/screw rond system, a hydraulic cylinder, etc. are conceivable, but a worm jack system is preferable because it allows a large reduction blade to be obtained with a relatively simple mechanism.

Regarding the longitudinal direction of the clad steel plate W, as shown in Fig. 2, one upper roll-down roll IU is provided oppositely between two lower roll-down rolls ILO installed a predetermined distance apart. It is also possible to have the rolls facing each other at the same position, or to have one lower rolling roll facing each other between two upper rolling rolls.

For feeding the clad steel plate W, a drawing mechanism using a wire rope traction (see FIG. 4), a feeding mechanism using rotationally driven grip rolls (see FIG. 6), or the like can be used.

[For production]

As shown in Fig. 1, by positioning the end of the clad steel plate W in a straightening machine and adjusting the vertical position of each rolling roll 1, each rolling roll 1 is moved in the width direction of the steel plate into a shape opposite to the shape of the plate before straightening. The clad steel plates W are arranged so as to be curved with a constant curvature, and are given reverse plastic deformation bending in the width direction of the clad steel plates.
Pull out or send out in the longitudinal direction. Figures 1 and 2
As shown in the figure, when the rolls are arranged in both the width direction and the longitudinal direction of the steel plate, the vertical position of each reduction roll 1 where not only the width direction warpage but also the longitudinal direction warpage is corrected is the third
As shown in the figure, the shape of the steel plate is measured manually or automatically before straightening, the necessary reverse bending curvature is calculated from this shape measurement information and the steel plate size information, and the worm jack 3A is calculated from this curvature, plate thickness, plate width, etc. This is done by controlling the drive motor (AC motor, hydraulic motor). After threading, the shape of the steel sheet is measured, and if appropriate, each reduction roll 1 is opened and placed on standby. If the shape of the steel plate is inappropriate, it is corrected again by a reverse pass or the like.

Note that the curvature of the reverse plastic deformation bending is preferably a constant curvature so that force is applied evenly. Further, it is easier to bend the upper and lower reduction rolls by aligning them at the center in the width direction of the steel plate and arranging them in a staggered manner in the width direction on the outside.

〔Example〕

This is board thickness 8-30 Tsuru, board thickness 1500-4000fi
This is an example in which the present invention is applied to a clad steel plate having a maximum plate length of 15,000 m, and as shown in FIG. 4, the warpage straightening machine of the present invention is installed between a front table 4 and a rear table 5.

As shown in FIG. 1, the warp straightening machine forms a stand with an upper frame 6 and a lower frame 7, and the upper frame 6 is provided with an upper roll group 2U, and the lower frame 7 is provided with a lower roll group 2L.

The reduction roll 1 is a roll having a narrow width and a convex crown on the outer periphery, and is rotatably attached to a bearing member 8. The worm jack 3A is fixed to each frame 6.7, and by attaching a bearing member 8 to the tip of the screw rond 3B, the vertical position of the reduction roll 1 can be adjusted.

In addition, the arrangement of the upper and lower reduction rolls 1 in the width direction of the steel plate is aligned at the center and arranged in a staggered manner toward the outside, and in the longitudinal direction of the steel plate, they are installed at a predetermined distance apart, as shown in Figure 2. One upper roll IU is provided oppositely between the two lower rolls LL.

Regarding the roll arrangement, in addition to the above arrangement, the arrangement of the upper and lower reduction rolls 1 in the width direction of the steel sheet as shown in FIG.
Although it is the same as Fig. 1, in the longitudinal direction of the steel plate, one upper rolling roll IU and one lower rolling roll IL may be opposed at the same position, or as shown in Fig. 13, in the steel plate width direction and the steel plate The upper and lower reduction rolls 1 in the longitudinal direction may be provided so as to face each other at the same position, and the rolls may be selected and used in accordance with the warp direction (upper, lower) in the width direction of the clad steel plate.

4 and 5 show an example of a steel plate pulling mechanism using a wire rope 19. A rope pulley 11 that is rotationally driven by a pulling motor 10 is provided on the exit side of the rear table 5, and a wire rope 9 that has been wound is Rear table 5 via pulley 12
It is pulled out upward, its tip is connected to the connecting hole of the clad steel plate W, and the clad steel plate W is pulled and pulled out.

6 to 8 are examples of a feeding mechanism using grip rolls 13 provided between the warp straightening machine and the rear table 5, and a pair of upper and lower grip rolls 13.
By this, both ends in the width direction of the straightened cladding steel plate are held, and the steel plate is sent out by rotationally driving the grip rolls 13.

In the pair of upper and lower grip rolls 13, as shown in FIG. 8, the lower roll 13L is a drive roll driven by a roll rotation motor 14, and the upper roll 13U is attached to the grip head 16 via a hydraulic cylinder 15 for advancing and retracting. ,
The end of the steel plate can be compressed, making it possible to accommodate various plate thicknesses.

The grip head 16 is attached to an elevating frame 17 via a shaft 18 so as to be able to swing in the vertical direction, and as shown in FIG. to be able to grip.

In addition, the elevating frame 17 is equipped with a linear bearing 2 on the slide frame 20 in order to accommodate plate width, warping, etc.
1, and can be raised and lowered by a lifting motor 22 and a lifting worm jack 23. The slide frame 20 is also movable in the width direction of the steel plate via a linear bearing 25 on the lower frame 24, as shown in FIG.
It can be fixed by a hydraulic clamp 26.

Further, the lower frame 24 is also movable with respect to the base 27, and is moved in the width direction of the steel plate by a traverse hydraulic cylinder 28, so that fluctuations in the width direction of the ends of the steel plate can be absorbed.

〔Effect of the invention〕

As mentioned above, the clad steel plate warpage straightening machine according to the present invention has a roll group consisting of a plurality of reduction rolls with a convex crown on the outer periphery arranged above and below, and performs reverse plastic bending with a constant curvature in the width direction of the steel plate. Since it is configured so that it is added to the clad steel plate, the following effects are achieved.

(i) Curvature in the width direction of a steel plate can be easily corrected, which was difficult to do with a roll leveler.

(ii) In order to eliminate warping in the width direction with a roller leveler, it is necessary to repeatedly apply large bends in the longitudinal direction, which reduces the adhesive strength between dissimilar metals. Since only the reverse bending is applied, warping in the width direction can be corrected without reducing adhesive strength.

(iii) Warps can be easily corrected in an extremely short time compared to press correction, and without requiring any skill.

[Brief explanation of drawings]

FIG. 1 is a front view showing a warpage straightening machine according to the present invention, FIG. 2 is a sectional view taken along the line ■ in FIG. 1, FIG. 3 is a flowchart showing control of the warpage straightening machine, and FIGS. 4 and 5 FIG. 2 is a plan view showing a mechanism for pulling out a steel plate. A side view, FIGS. 6 and 7 are plan views and side views showing the steel plate feeding mechanism, FIG. 8 is a sectional view taken along the line ■ in FIG. 7, and FIG.
Figures 1O and 11 are front views, side views, and plan views showing details of the grip roll delivery mechanism, Figures 12 and 13 are other embodiments, and Figure 12 (A) is a front view. figure,
Figure 12 (B) is a sectional view taken along line A in Figure 12 (A), and Figure 13
Figure (A) is a front view, and Figure 13 (B) is a sectional view taken along line B in Figure 4. 3
... Vertical position adjustment device 3A ... Worm jack 3B ... Screw rod 4 ... Front table, 5 ... Rear table 6 ... ... Upper frame, 7... Lower frame 8... Bearing member, 9... Wire rope lO... Pulling motor, 11...
... Lobe wheel 12 ... Pulley, 13 ...
・Grip roll 14...Roll rotation motor 15...Hydraulic cylinder for advancing and retreating 16...Grip head, 17...Elevating frame 1
8... shaft, 19... rocking motor 20.
...Slide frame 21 ... Linear bearing 22 ... Lifting motor 23 ... Lifting worm jack 24 ...
・Lower frame 25・・・Linear bearing

Claims (1)

[Claims] (1) A roll group consisting of rolling rolls with convex crowns on the outer periphery arranged at intervals in the width direction of the clad steel plate is moved up and down in the width direction of the clad steel plate across the transport path of the clad steel plate. A warping straightening machine for a clad steel plate, characterized in that the reduction rolls are arranged in a staggered manner and the vertical position of each of the reduction rolls can be adjusted independently with respect to the clad steel plate.