JP3268369B2 - High precision rolled metal sheet manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to produce a metal sheet such as a strip of steel, which is used for electronic equipment, precision machinery, etc., has a high thickness accuracy, has improved mechanical anisotropy, and is extremely thin. A device suitable for

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a flat and thin metal plate having a high plate thickness accuracy, a method described in Japanese Patent Publication No. 2-51695 filed by the present applicant has been known. According to this method, as shown in FIGS. 1 and 2, a long metal plate a is formed along a mold d having a tapered processing surface b followed by a processing surface c of a flat portion, and along the processing surface. A method is known in which the metal plate a is intermittently moved in the length direction every time the rolling e of the roll e is completed, and rolling is performed. According to this method, for example, a stainless steel plate having a thickness of 1.2 mm and a thickness accuracy of ± 3/1000 mm can be manufactured. In addition, in a general roll rolling method, there is a phenomenon that a rolled plate is edge-dropped, that is, the plate thickness at both ends of the plate is smaller than the center portion, and since both ends of the plate do not have a predetermined plate thickness, Since the roll is rolled and rolled with a crown, the metal plate f is rolled by a pair of rolls g and g as shown exaggeratedly in FIG. It is also done. The edge drop also occurs in the case of the rolling method shown in FIGS. 1 and 2, and after rolling, both ends of the metal plate are cut off to obtain a product.

Further, in a conventional general roll rolling method,
A metal plate has mechanical anisotropy due to mechanical anisotropy caused by the crystal being stretched in the rolling direction (length direction), depending on the direction of the metal plate, that is, the length direction, width direction, oblique direction, and the like. There is also a disadvantage that the material properties become anisotropic and the direction of use of the material is limited.

[0004]

If the roll e used in the mold rolling method shown in FIGS. 1 and 2 is formed into a crown shape as shown in FIG. 3, the thickness in the width direction can be reduced even in the mold rolling method. Although the control is possible and the edge drop can be eliminated, it is difficult to control the roll crown, and it is not possible to sufficiently control the thickness in the length direction with high precision due to the uneven elongation of the material. Also,
In order to suppress or prevent anisotropy of the metal sheet rolled by roll rolling, there is usually no other than heat treatment, and such processing is troublesome.

According to the present invention, the precision of thickness of a thin metal plate in the longitudinal direction is made high, the edge drop can be prevented in the width direction without impairing the thickness precision, and the mechanical anisotropy by rolling is reduced. It is an object of the present invention to provide a manufacturing apparatus capable of performing the above.

[0006]

According to the present invention, a long metal plate has a tapered processing surface and a flat surface processing surface following the tapered processing surface, and has a flat surface processing surface on both sides of these processing surfaces. Between the mold having a gap regulating edge having a step height equal to a desired plate thickness and a roll rolling along the processing surface, and each time the rolling of the roll is completed. In an apparatus for rolling by intermittently moving the metal plate in the length direction, the tapered processing surface of the mold is tapered in two steps in the length direction of the metal plate. The above-described object is achieved by forming a width-direction tapered portion extending to both ends in the width direction on the length-direction processing surface and forming the length-direction processing surface and a processing surface of a flat portion following the length-direction processing surface. I made it.

[0007]

When one side of the metal plate is placed on the tapered processing surface of the mold and the processing surface of the flat portion, and the roll is rolled while contacting the clearance regulating surface of the metal mold, The thickness is reduced by the taper of the mold. After rolling the roll, the metal plate is slightly moved in the longitudinal direction and the roll is rolled again. By repeating the rolling, the thickness of the metal plate gradually decreases, and the height of the flat surface of the processing surface is reduced. It is processed to the desired thickness with accuracy. Such an operation is substantially the same as that of a conventional machined surface having a tapered surface. However, in the present invention, the tapered machined surface of the mold is raised in two stages in the longitudinal direction of the metal plate. Since it was formed on the raised tapered lengthwise processing surface, the widthwise tapered portion extending to both ends in the width direction was formed on the lengthwise processing surface and the processing surface of the flat portion following it,
The metal plate is reduced in thickness in the first step of the tapered surface, and furthermore, when the thickness is reduced in the second step, the material is slightly moved by the taper in the width direction, so that edge drop is prevented. You. Since the processed metal plate has no edge drop, it is not necessary to cut both ends thereof, so that the step of wasting material and cutting off can be omitted.

Further, the metal sheet processed by the apparatus of the present invention has a high ratio of deformation behavior flowing in the width direction, and usually has a phenomenon in which the crystal orientation is uniform as compared with a rolled material in which the crystal orientation is aligned in the length direction. It is suppressed and the mechanical anisotropy of the material is reduced.

[0009]

Embodiment An embodiment of the present invention will be described with reference to FIG.
In FIG. 1, reference numeral 1 denotes a long metal plate such as stainless steel or copper alloy, 2 denotes a mold, and 3 denotes a roll. The mold 2 is shown in FIG.
As shown in FIG. 2, a processing surface 4 having a tapered shape and a processing surface 5 of a flat portion following the tapered surface 4 are provided. Further, on both sides of the processing surfaces 4 and 5, the rising height from the processing surface 5 of the flat portion is a desired plate. The gap regulating edges 6, 6 having a step equal to the thickness are provided. The roll 3 reciprocates in the longitudinal direction of the metal plate 1 while being in contact with the gap regulating edges 6, 6, and releases the pressure contact between the mold 2 and the roll 3 each time the reciprocation of the roll 3 is completed. When the intermittent movement of the metal plate 1 in the length direction is repeated, the metal plate 1 is gradually rolled, and the flat portion is rolled to a plate thickness set to the rising height from the processing surface 5. Although substantially the same as the conventional one, in the present invention, in order to prevent the edge drop of the rolled metal plate 1, the tapered processing surface 4 is used.
As shown in FIG. 5, as shown in FIG.
Further, as shown in FIG. 6, a width direction taper portion 7 extending to both ends in the width direction is formed on the processing surface 4 and the processing surface 5 of the flat portion.
a, 7b were formed.

The metal plate 1 is rolled by a roll 3 which rolls in contact with a mold 2, and before the rolling progresses to a predetermined thickness, the metal plate 1 is formed by the tapered portions 7a and 7b in the width direction.
Is slightly moved to both ends thereof, and the edge drop of the rolled metal plate 1 is eliminated.

A specific embodiment of the present invention will be described in terms of dimensions (thickness × thickness).
To explain the case where a long strip of 1.25 mm in thickness is manufactured by rolling a metal plate of a JIS SPCE-SD strip steel strip with a width of 1.4 x 60 x 50000 mm and processing rate of 10.7%, It is as follows. As shown in FIG. 2, as the mold 2, the target dimension (step) D is 1.25 mm, the taper of the first step longitudinal processing surface 4 a is 1/800, and the taper of the second step longitudinal processing surface 4 b is 1/500
0, a taper of the width direction tapered portions 7a, 7b is prepared to be 1/600, and the vertical and horizontal dimensions of the processing surface 5 of the flat portion are processed and polished to 40 × 30 mm. 120mm
A rolling roll is prepared. Then, the roll 3 is pressed and rolled while being in contact with the gap regulating edges 6, 6 of the mold 2 in the same manner as in the prior art, and the metal plate 1 is moved by 5 mm in the direction of the arrow every time the rolling is completed. Thick rolled metal sheets were produced. The thickness variation in the length direction of the manufactured metal plate 1 in the length direction is as shown by a curve A in FIG. It can be seen that the thickness in the length direction is uniform on the order of several microns. The manufactured metal plate 1 had a material having an edge drop in the width direction as shown by a curve C in FIG. 8. No edge drop was found, and a better result was obtained than when rolling was performed only by ordinary roll rolling (curve E). In the case of curve D, both ends are slightly thicker,
If the rolled metal plate is further roll-rolled or the taper in the width direction of the mold is moderated, the thickness can be corrected.

Next, as an embodiment of improving anisotropy, a JIS permalloy B having dimensions (thickness × width × length) of 0.5 × 60 × 50,000 mm will be described.
A case where a long strip of 0.4 mm in thickness is produced by subjecting a metal plate of a magnetic material steel strip of a grade to rolling at a processing rate of 20% by the apparatus of the present invention will be described below.

[0013] As shown in FIG.
Is 0.4 mm, and the taper of the first-stage longitudinal processing surface 4a is 1/150.
0, the taper of the processing surface 4b of the second step is 1/3333, the taper of the width direction taper portions 7a and 7b is 1/500, and the vertical and horizontal dimensions of the processing surface 5 of the flat portion are 40 × 30 mm. A rolled metal sheet was manufactured in the same manner as in the above example. FIG. 9 shows the results of comparative measurement of the Young's modulus of the manufactured magnetic metal plate in the material direction and the Young's modulus of a metal plate manufactured by normal roll rolling of the same material. According to this result, it can be seen that the curve F of the Young's modulus of the metal plate manufactured by the apparatus of the present invention has less anisotropy than the curve G of the Young's modulus of the metal plate by the conventional roll rolling.

[0014]

As described above, according to the present invention, the tapered working surface of the metal mold for manufacturing a high-precision thin metal plate is formed in two stages in the longitudinal direction of the metal plate. Since the tapered lengthwise processed surface was formed and the widthwise tapered portion extending to both ends in the widthwise direction was formed on the lengthwise processed surface and the flat surface processed surface, during the process of rolling gradually thinner. The material of the metal plate can be moved in the width direction to prevent edge drop, a metal plate having a uniform thickness in the width direction and the length direction can be obtained in one step, and both ends of the rolled metal plate are removed. It is possible to produce a rolled material of ultra-high precision economically and quickly without waste, and to produce a rolled material with improved mechanical anisotropy.

[Brief description of the drawings]

FIG. 1 is a side view of a conventional example.

FIG. 2 is a perspective view of the mold of FIG. 1;

FIG. 3 is an explanatory view of a conventional rolling method for preventing edge drop.

FIG. 4 is a perspective view of an embodiment of the present invention.

FIG. 5 is a perspective view of a process of manufacturing the mold of FIG. 4;

6 is a perspective view of the mold of FIG.

FIG. 7 is a view showing a measurement of thickness variation in the length direction of a metal plate rolled by the apparatus of the present invention.

FIG. 8 is a diagram showing a measurement of a thickness variation in a width direction of a metal plate rolled by the apparatus of the present invention.

FIG. 9 is a diagram showing a measurement of Young's modulus with respect to directionality of a metal plate rolled by the apparatus of the present invention.

[Explanation of symbols]

1 metal plate 2 mold 3
Roll 4, 4 a, 4 b Tapered lengthwise processing surface 5 Flat surface processing surface 6, 6
Gap regulating edge 7a, 7b Width taper

Claims (2)

(57) [Claims] 1. A long metal plate having a tapered processing surface and a flat surface processing surface following the tapered processing surface, and having a rising height from the processing surface of the flat portion on both sides of the processing surface. It is interposed between a mold provided with a gap regulating edge having a step equal to the thickness and a roll rolling along the processing surface, and the metal plate is moved in the longitudinal direction every time the rolling of the roll is completed. In a device for rolling by intermittently moving the metal plate, the tapered working surface of the mold is formed as a tapered longitudinal working surface that is raised in two stages in the longitudinal direction of the metal plate. An apparatus for manufacturing a metal plate having a high precision thickness, wherein a taper portion in the width direction extending to both ends in the width direction is formed on the processing surface of the length direction processing surface and the processing surface of the flat portion subsequent thereto. 2. The method according to claim 1, further comprising the step of:
The manufacturing method of a high-precision metal plate according to claim 1, wherein the gradient of the processing surface in the step and the width of the processing surface in the width direction is greater than the gradient of the processing surface in the second stage of the processing surface in the length direction. apparatus.