JPH0596338A - Production of deformed cross section bar - Google Patents

Abstract

PURPOSE:To put a thin plate part and a thick plate part in the same hardness and to obtain a deformed cross-section bar excellent in workability by rolling a base stock with the roll surface of one vertical roll and the roll sides of one pair of horizontal rolls, annealing the deformed cross-section bar obtained, then, rolling it with a form roll to the same working rate. CONSTITUTION:A stock is rolled by the roll surface of one vertical roll and the roll sides of one pair of horizontal rolls having an axis orthogonally crossed with the vertical roll axis a deformed cross-section bar 7 manufactured a deforming stage forming the thin plate part and by this stage are annealed, then, the deformed cross-section bar 7 is manufactured by a refining rolling stage to roll so that the thick plate part and the thin plate part take nearly the same working rate by form rolls 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a modified cross-section strip.

[0002]

2. Description of the Related Art In order to manufacture a so-called irregular cross-section strip having a portion having a different strip thickness in the strip width direction by rolling from a flat plate material, it is necessary to cause material deformation of a rolling portion in the strip width direction. is necessary.

As one of the methods, for example, a thin plate portion is processed by using one vertical roll 2 surface as shown in FIG. 2 and a pair of side faces of a horizontal roll 3 having an axis perpendicular to the axis of the roll. A method and a method of manufacturing a modified cross-section strip by an apparatus in which a backup roll 4 is arranged on the opposite side of the vertical roll 2 as shown in FIG. 3 have been proposed.

These methods apply a shearing force to the material rolling portion by rolling the material between the surface of the vertical roll and the side surface of the horizontal roll, whereby effective deformation in the plate width direction can be obtained. Further, since it is a rolling process, it is also a highly productive method.

In FIGS. 2 and 3, 1 is a material and 11 is a material.
Indicates the thin plate portion, and 12 indicates the thick plate portion.

Generally, the modified cross-section strip is subjected to punching, bending, etc. by press working, and then used as a terminal material or a lead frame material.

In the modified cross-section strip manufactured by the above-described method, only the thin plate portion 11 is rolled, so that the rolled thin plate portion 11 is hard, while the thick plate portion 12 is in an unrolled state. Therefore, it is softer than the thin plate portion 11.

The difference in hardness between the thick plate portion 12 and the thin plate portion 11 is
Since the modified cross-section strip has an adverse effect on the pressing process, it is desirable that the thick plate portion and the thin plate portion have the same hardness.

The object of the present invention is to overcome the drawbacks of the prior art,
It is an object of the present invention to provide a method for manufacturing a modified cross-section strip in which the thick plate portion and the thin plate portion have substantially the same hardness.

[0009]

To achieve the above object, according to the present invention, a roll surface of one vertical roll and roll side surfaces of a pair of horizontal rolls having an axis perpendicular to the axis of the roll are provided. Deformation processing step of rolling the material to form a thin plate portion, and tempering the profile cross-section strip manufactured by the above process, and then rolling with a die roll so that the thick plate portion and the thin plate portion have approximately the same degree of processing A method for manufacturing a modified cross-section strip, comprising: a rolling step.

The present invention will be described in more detail below. The manufacturing method of the present invention has a profile processing step and a temper rolling step as a subsequent step.

FIG. 1 shows an apparatus used in the profile processing step.
The representative ones are shown in FIG.

FIG. 2 is a partial sectional view showing an example of the profile processing apparatus according to the present invention. The raw material 1 is rolled by the roll surface having the groove of one vertical roll 2 and the roll side surfaces of the pair of horizontal rolls 3. At this time, a backup roll having an axis parallel to the axis of the vertical roll 2 may be installed so that its roll surface is in pressure contact with the surface of the horizontal roll 3 opposite to the processed surface. As a result, roll deformation of the horizontal roll 3 can be prevented, and a rolled material with high plate thickness accuracy can be obtained.

FIG. 3 is a partial cross-sectional view of the profile processing apparatus using the backup roll 4 having the protrusion 41. The surface of a cylindrical vertical roll 2 and a pair of horizontal rolls 3
These rolls 2 and 3 are installed with a gap corresponding to the width of the thick plate portion of the material 1 between the roll side and the roll side face. A backup roll 4 having a protrusion 41 having a width corresponding to the width of the central thin plate portion 13 after material processing is installed on the side opposite to the processing surface of the horizontal roll 3. With such an apparatus, the vertical roll 2 and the horizontal roll 3 roll both edges of the material 1, and the projection 41 of the backup roll 4 and the vertical roll 2 roll the central portion of the material 1.

At this time, most of the material deformation of the rolling portion at the center of the material 1 occurs in the longitudinal direction of the material 1, but the width of rolling is small and the material is rolled by the vertical roll 2 and the horizontal roll 3. It is absorbed by the elongation of the thick plate portion (unrolled portion) due to the longitudinal deformation slightly generated in the portion, and uneven deformation such as corrugation does not occur. It is possible to manufacture a double-height modified cross-section strip having

In the above description, the roll arrangement of the deforming machine is described as a vertical roll and a horizontal roll for convenience.
It does not matter even if these positional relationships are reversed.

FIG. 1 is a sectional view of a temper rolling apparatus showing an embodiment of the present invention. Heating the modified cross-section processed material 7 obtained by the modified processing apparatus shown in FIG. 2 at a temperature according to the material.
A case of temper rolling after annealing will be described as a typical example. The thin plate portion by the die roll 5 having a groove width w corresponding to the width of the thick plate portion of the modified cross-section processed material 7 and a groove depth t designed so that the thin plate portion and the thick plate portion have substantially the same degree of processing. The thick plate portion is rolled at the same degree of processing at the same time. Normal groove width w is processed material 7
The width t is slightly narrower than the width of the thick plate portion, and the depth t is selected according to the working degree of the thin plate portion and the thick plate portion of the processed material. As a result, the thin plate portion and the thick plate portion have uniform hardness, and it is possible to obtain a modified cross-section strip having no distortion and good press workability.

[0017]

EXAMPLES The present invention will be specifically described below based on examples.

(Example 1) Plate thickness 2.2 mm, plate width 40 m
m an oxygen-free copper strip annealed material, using a vertical roll 2 having a groove width of 20 mm and a groove depth of 2.5 mm, a thin plate thickness of 0.7 mm was obtained by a profile processing apparatus shown in FIG. Rolled so that. The plate thickness of the obtained processed material is 2.
It was 12 mm. When the cross-section hardness of the processed material was measured with a micro Vickers meter under the condition of a load of 500 g, the processed thin plate portion was 116 on average, and the thick plate portion was 69.

This profiled material was annealed under the condition of 400 ° C. × 1 hr, and then tempered using a die roll 5 of FIG. 1 having a groove having a depth of 0.8 mm so that the thin plate portion had a thickness of 0.4 mm. Rolled. At this time, the workability of the thin plate portion and the thick plate portion is about 43%. The cross-section hardness of the obtained temper-rolled material is from the thin plate portion 109 to
112 and the thick plate portions 110 to 113, it was possible to obtain a modified cross-section strip having substantially uniform hardness in the thick plate portion and the thin plate portion.

[0020]

Since the present invention is constructed as described above, it is possible to efficiently produce a modified cross-section strip having uniform performance without distortion in both the thin plate portion and the thick plate portion. Also, the thin plate part,
Since the thick plate portion has the same hardness, it is possible to obtain a modified cross-section strip excellent in press workability in a post process.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a temper rolling device according to the present invention.

FIG. 2 is a partial cross-sectional view showing an example of a profile processing apparatus according to the present invention.

FIG. 3 is a partial cross-sectional view showing another example of the deformation processing apparatus according to the present invention.

[Explanation of symbols]

 1 material 11 thin plate part 12 thick plate part 13 central thin plate part 2 vertical roll 3 horizontal roll 4 backup roll 41 protrusion 5 type roll 6 flat roll 7 processed material w type roll (groove width) t type roll (groove depth)

Claims (1)

[Claims] 1. A deforming step of rolling a material to form a thin plate portion by the roll surface of one vertical roll and the roll side surfaces of a pair of horizontal rolls having an axis perpendicular to the roll axis, and A method of manufacturing a modified cross-section strip, comprising: annealing the modified cross-section strip manufactured by the method 1; and temper-rolling so that the thick plate portion and the thin plate portion have substantially the same workability by a die roll.