JPS59189015A - Magnetic straightening device of steel sheet - Google Patents

Abstract

PURPOSE:To straighten continuously the deflection of a thin steel sheet by arranging a pair of rolls at the lower part of a moving path of the sheet and providing a magnetic device between the rolls. CONSTITUTION:Immediately before a thin steel sheet 41 unwound from an unwinding roll 40 arrives at coating rolls 432, the sheet 41 passes the upper part of a magnet 20 while bringing its lower surface into contact with the upper peripheries of a pair of nonmagnetic rolls 4. When the sheet 41 passes the upper part of the magnet 20 of a magnetic straightening device 50, the deflection and the camber of the sheet 41 are magnetically absorbed by the magnet 20 to straighten the sheet 41 into a straight line shape. Accordingly, the sheet 41 arrives at the outer periphery of the coating roll 432 of a coating device 43 while maintaining its flate state, and the surface of sheet 41 is coated uniformly in thickness with a paint 44 to form a paint film 45 of uniform thickness.

Description

[Detailed description of the invention] The present invention relates to a magnetic straightening device for thin steel sheets.

For example, when producing long colored steel plates, the production line involves continuously moving the coiled steel plate while unwinding it from an unwinding roll, and painting the surface along the way. Apply paint using a roller, etc.

Thereafter, it is dried by passing through a drying oven, and the dried painted color steel sheet is wound onto a winding roll. In this case, it is necessary to form a coating film with a uniform thickness on the steel plate to be coated, but in order to do so, the thin steel plate unwound from the unwinding roll must be at the position of the painting roller. It is an essential requirement that it be kept geometrically flat. However, the thin steel sheet that is rewound from the rewinder roll is generally

When sent to the coating roller, it is usually curved in a convex or concave shape in the width direction with respect to the circumferential surface of the roller. To do this, the tension applied to the thin steel plate by the winding roll is increased so that the thin steel plate with the curved profile in the width direction has a flat profile, thereby maintaining the flatness of the thin steel plate. However, it has been experienced that it is impossible to make a thin steel plate completely flat even with this method. Therefore, the thickness of the coating film applied on a thin steel plate that does not have such flatness lacks uniformity, and for this reason.

It is known that it causes uneven coloring and peeling, which significantly reduces the value of the product, and the industry has been requesting effective countermeasures for many years.

The present invention provides a steel plate that can meet these demands.
In particular, the aim is to obtain a continuous magnetic straightening device for the deflection of thin steel, etc.

In order to achieve this object, the present invention aims at lower pressure of the moving path of a continuously moving steel plate, in particular a thin steel plate, at right angles to its direction of movement/pairs of rolls rotatably at a certain interval and ′? 6- Arranged so as to be able to contact the steel plate, and within the interval between these/pairs of rolls, an upper surface parallel to and slightly below the plane connecting the upper peripheral surfaces of both rolls and with a slight spacing therebetween. The present invention is characterized in that a magnet device having a magnet device is arranged so as to extend in the longitudinal direction of the roll.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings showing embodiments thereof.

First, as shown in Figs. A hollow frame having a rectangular plan view is arranged on a horizontal plane by other legs, and these are firmly connected to each other by /pairs of miso section steel λ placed opposite to each other at each end thereof. Form body 3. In addition, on the outer surface of the winter Yamagata m/, there are several handle-strengthening lip/
1 is firmly fixed to improve rigidity.

In addition, between the opposing cross section steel sections, a pair of non-magnetic roller lags having an appropriate outer diameter and length are placed facing each other at a certain interval and parallel to the vertical legs of the chevron section. The non-magnetic rollers are arranged redundantly horizontally so that the central axis of each of them is I.

is fixed to the web of the miso shaped steel at each end of the
These roller lugs are allowed to rotate freely on the central axis l1 via bearings built into them (not shown).

In this case, the plane connecting the upper peripheries of both non-magnetic rollers is . It shall protrude slightly from the upper edge of the vertical leg of the mountain shape steel.

In addition, each miso shaped steel has a non-magnetic roller q in the center of the interval between them. Beneath the magnet fixing base 10, which is made of a bevel shaped steel, is arranged in parallel to each of the angle shaped steels, fixed at both ends thereof, so that its web io is horizontal. And on this fixed base lθ,
/Iβl or several approximately rectangular hexahedral magnets, 2
0 is lAI individually in the upper and lower directions and in the longitudinal direction of the non-magnetic roller relative to the magnet fixing base 10K! It can be installed freely.

That is, as shown in detail in FIGS. 5 to 7, each magnet 20 is a hollow yoke in the shape of a rectangular hexahedron with a bottom, 2/
A rectangular hexahedral permanent magnet 2- is fixed to the bottom of the hollow part at a certain distance from the inner wall of the hollow part.
In this case, the upper surface of the hollow yoke, 2/.

The top surface of the permanent 6 stones, 2.2, should be in the same horizontal plane. In addition, each magnet 20 (l-j:, is connected to the magnet identification base IO so as to be adjustable in the vertical direction, and for this purpose, l pairs of angles are attached to each of both vertical f10. of the magnet fixing base 10. A kite plate // shaped like this is removably fixed by its respective vertical legs l/l so that each horizontal leg // faces outward, and each guide plate Magnetic vertical adjustment bolts 23 are screwed into the horizontal leg //2 and are spaced apart from each other.
The upper end of the yoke 23 is rotatably supported by the bottom of the yoke 2/. That is, each guide plate ll itself has its vertical leg//, IfC, and both vertical legs//θ2 of the miso shaped steel forming the magnet fixing base 10. bolt hole/
Drill a hole /3 for installation corresponding to 2.

These holes/2. /3, each guide plate // can be properly fixed to the magnet fixing base 10 via bolts (not shown).

In this way, by adjusting the magnet vertical adjustment bolt 23, the magnet unit θ is adjusted relative to the magnet fixing base 10.

Can be adjusted up and down, so the magnet-
It can be adjusted so that the upper surface of 〇 is arranged slightly below and parallel to the plane connecting the upper circumferential surfaces of both non-magnetic rollers.

In addition, the position of each magnet 20 in the longitudinal direction of the magnet fixing base 10 is appropriately selected from hole /3 for mounting the kite board // and bolt hole /2 for adjusting the left and right magnets on the base IO. However, by fixing them to each other with bolts, it is possible to adjust the left and right sides as appropriate.

In this embodiment, a permanent magnet is used as the magnet 20, but it is also possible to use an electromagnet instead of a permanent magnet.

The apparatus of the present invention has the above-mentioned configuration, but its operation will be first described in the case where the apparatus of the present invention is installed in a production line for color steel plates as shown in FIG.

As shown in Figure 3, this color steel plate production line is
A coiled thin steel plate G/ wound on a restoring roll lI0 and a winding roll lI2 for winding it.
It is made up of.

By driving the winding roll λ in the direction of the arrow X, the thin steel plate G/ is pulled at high speed in the direction of the arrow Y from the thin steel sheet coil lI/I on the unwinding roll aO for one winding. It is wound as a coil of colored steel plate Hiroshi/2 on roll lI2.

A coating device 3 is disposed in the middle of the movement of the thin steel plate O, and a drying oven 6 is installed following it. Between device da 3.

The thin steel plate 4'/ is placed at the bottom of the movement path of the thin steel plate 4'/.
is placed in such a state that it comes into contact with both non-magnetic rollers constituting the device SO of the present invention. Talented. Painting equipment da 3
is paint tank lI3. and.

It consists of seven pairs of painting roller lugs 32 that are in contact with each other, one roller 1132 is immersed in the paint +<< in the tank l/-3I, and the other roller lugs 3
□ comes into contact with the lower surface of the thin steel plate/, and in this way, when the thin steel plate/ moves in the Y direction, the paint dada is applied to the lower surface of the thin steel plate/, and a coating film S is formed.

In this way, when the color steel plate production line is in operation, just before the thin steel plate l unwound from the unwinding roll 0 reaches the painting roller ruff 32, the lower surface of the thin steel plate l is oriented at the left side θ of the present invention apparatus. +7 (+7) so that it passes over the upper part of the magnet -0 while contacting the upper periphery of the pair of non-magnetic rollers. Therefore, when the thin steel plate l arrives at the position of the coating roller 32 of the coating device l For example, da/ is
As shown by an enlarged cross-sectional view in FIG.

Its width is 1132. against outside drawings.

Even if the N steel plate ll/ has a tendency to exhibit a convex shape (4/") or a concave shape (4/"), the magnetic straightening device according to the present invention has a left θ magnet. When passing, the deflection or warping of the convex (F/') or concave (R/1) is caused by the magnet, 20, placed below it.
magnetically absorbed by.

@ Straightened into a linear shape, therefore, the thin steel plate g/ arrives in a flat state on the outer circumferential surface of the coating rollerf 32 of the coating device g3, and therefore the surface of the thin steel plate l/ has a uniform thickness. Paint 41! is painted, and its coating jQ11. t is formed to have a uniform thickness.

In this case, the thin steel plate lI/ should be in a non-contact state with the surface of the magnet 2θ of the magnetic straightening device Sθ according to the present invention. Assuming that it is constant, it changes depending on the thickness of the thin steel plate lI/, so in order to adjust it, each magnet 20 is adjusted by adjusting the vertical adjustment bolt 23 provided on its guide plate lI. It is said to be adjustable.

In addition, the magnets 20 are arranged so that the required number of magnets 20 can be attached or removed depending on the width of the thin steel plate 4 (/).

Fix each guide plate // each vertical leg 1 of the base IO
The pair of holes drilled in the vertical N//I of each guide plate 7) should be fixed to the magnet left/right adjustment bolt holes /2 provided at a constant pitch at 0t with bolts in the holes /3. By.

Its position is said to be adjustable.

As described above, according to the present invention, for example, when a long coiled thin steel plate such as a colored steel plate is unwound and a coating film is formed on the surface thereof, after the thin steel plate is straightened into a flat shape. , since paint can be applied on its surface.
It can exhibit excellent advantages such as being able to form a coating film with a uniform thickness, eliminating causes of color unevenness and peeling, and being able to provide products with high commercial value.

[Brief explanation of drawings]

FIG. 7 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a partially cutaway pressure surface view thereof.
FIG. 7 is a partial cross-sectional view taken along line IV-IV in FIG. 2, FIG. S is a plan view of the magnet, and FIG. 6 is its VI-V
7 is a sectional view taken along line I, FIG. 7 is a sectional view taken along line ■-■ in FIG. , is an enlarged cross-sectional view showing an example of a curved state of a steel plate on a coating roller in a manufacturing line. ／・・Angle steel; ・・Groove steel; Hiro・・Non-magnetic roller;
/θ・Yu magnet fixing base; // ・-Guide plate; U0-, -Magnet; 2/...Yoke; 22
・ΦPermanent magnet; Yu3・Fist magnet adjustment bolt.

Claims (1)

[Scope of Claims] l A pair of rolls are disposed at a right angle to the direction of movement of a continuously moving steel plate, particularly a thin steel plate, at a certain interval below the movement path of the steel plate so as to be able to freely rotate and come into contact with the steel plate. In the space between these l pairs of opposing rolls, there is a magnet having an upper surface parallel to and slightly below the plane connecting the upper circumferential surfaces of the rolls with a slight distance therebetween. 1. A magnetic straightening device for the deflection of a steel plate, etc., characterized in that the device is arranged in the longitudinal direction of a roll. 2. A pair of opposing rolls is rotatably mounted through opposing vertical walls in a frame formed by vertical walls so as to form a hollow part having a substantially rectangular plan view, and the interval between the rolls is 2. The magnetic correction device according to claim 1, wherein a magnet device is mounted inside the magnetic correction device so that the distance between the upper surface of the magnet device and the plane connecting the upper circumferential surfaces of the rolls can be adjusted. Each of the 37 pairs of rolls is made of a non-magnetic material and each is rotatably journalled on a shaft having each end attached to an opposite vertical wall of the frame. 1. The magnetic correction device according to item 1 or 3. The magnetic orthodontic device according to any one of claims 1 to d, wherein the magnet device is divided into several parts in the longitudinal direction, and each part can be removably fixed to a fixed base. B. The magnetic correction device according to any one of claims 7 to 5, wherein the magnet of the magnet device is a permanent magnet. Z Claim 1 in which the magnet of the magnet device is an electromagnet
The magnetic orthodontic device according to any one of items .