JPH0318442A - Production of irregular section strip - Google Patents

Abstract

PURPOSE:To enhance the deformation effect of a material at the time of rolling and to decrease the use of the material for the irregular section strip by reversing the upper and lower disposition of grooved rolls and flat rolls. CONSTITUTION:The dispersion relation of the grooved roll 42 and the flat roll 41 of a 2nd work roll 4 is reversed above and below from the dispersion relation of the grooved roll and the flat roll of the 1st work roll 2 at the time of producing the irregular section strip by successively passing a flat plate- shaped stock 1 supplied in a specified direction (arrow) along the 1st work roll 2, the 2nd flat roll 3, the 2nd work roll 4, the 2nd flat roll 5 and a forming roll 6. In addition, the groove width of the 2nd work roll 4 is formed narrower than the groove width of the 1st work roll 2. The deformation effect of the stock is enhanced in this way.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing a strip of irregular cross section.

[Prior art] Conventionally, a plurality of upper and lower pairs of work rolls consisting of grooved rolls and flat rolls whose groove widths are gradually narrowed are used to roll down parts of the material in the width direction where the plate thickness should be reduced. A method is known in which a strip of irregular cross section is produced by rolling the material by applying force and deforming the material in a curved manner in the full region of a grooved roll.

In the conventional method described above, the pair of grooved rolls and flat rolls that make up the work roll are both arranged so that the upper and lower sides are in the same direction.

[Problem to be solved by the invention] By the way, in rolling using such work rolls,
The thin plate part to be rolled undergoes 60% or more processing in one processing. Further, even in a thick plate portion that only curves within the grooved roll, work hardening occurs in the material surface layer on the grooved roll side in the vicinity of the stepped portion that is the boundary between the thick plate portion and the thin plate portion. For this reason, when processing the vicinity of the stepped part of the thick plate formed in the previous bus with the next grooved roll, the material deforms, causing the problem that the width expansion in the plate width direction l\ becomes smaller. there were.

Further, when rolling with grooved rolls is performed from the same direction, the thin plate portion shaped in the previous pass is pressed against the lower roll (flat roll) during the next pass rolling.

For this reason, there is a problem in that the contact resistance between the material and the roll surface becomes large, which prevents the material from deforming in the width direction of the sheet.

An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a method for more effectively generating tenter deformation in the production of irregular cross-section strips using grooved rolls.

[Means and effects for solving the problem] In order to achieve the above object, in the present invention, the vertical arrangement of the curved roll and the flat roll constituting the work roll is sequentially reversed, thereby achieving the problems described below. As a result, it is possible to reduce the effect of work hardening of the intermediate rolled material and the contact resistance between the already rolled part and the flat part of the grooved roll, and to more effectively generate material deformation in the width direction during rolling. I can do it.

Note that materials applicable to the present invention include copper, copper alloys,
Metal strips such as aluminum and aluminum alloy are common, but the material is not particularly limited to these, and composite materials made of a combination of these may also be used.

[Example] The present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which a flat material 1 having a predetermined width and thickness is fed in a fixed direction (in this case, in the direction of the arrow in the figure). By passing through the first flat roll 3, the second work roll 4, the second flat roll 5, and the mold roll 6 in this order, the irregular cross-section strip 5 is manufactured. here,
The arrangement of the grooved roll 42 and the flat roll 41 in the second work roll 4 is upside down from the arrangement of the grooved roll and the flat roll in the work roll 2. Further, the groove width of the second work roll 4 is formed narrower than the full width of the first work roll 2.

In addition, when a uniform degree of processing is required for the product, it is preferable to install the second flat roll 5 and the mold roll 6 intermittently rather than continuously.

FIG. 2 shows the rolling state on the second work roll 4 in FIG. 1, with (a) showing immediately before rolling, (b) during rolling, and (C) immediately after rolling.

In the figure (a), the intermediate rolled material 12 processed by the first work roll 2 and the first flat roll 3 is supplied to the second work roll 4 in a state where it is processed from the plane side. At this time, the thin plate portion 16 of the intermediate rolled material 12 and the convex surface layer portion (portion indicated by the grid lines) near the thick plate step portion are work-hardened by the processing by the first work roll.

(b) shows the middle of rolling on the second work roll 4, and the groove width of the grooved roll 42 is narrower than the full width of the first work roll. Therefore, the processing here involves processing both edges of the thick plate portion 17 that have not been rolled within the grooves of the first work roll. At this time, processing starts from the flat surface of the intermediate rolled material 12, but since this portion is not affected by work hardening due to processing with the first work roll, it is easily deformed, and therefore deformation in the sheet width direction is also likely to occur. Further, the thin plate portion 16 formed by the first work roll is slightly raised toward the flat work roll. Therefore, the thin plate portion 16 and the grooved roll flat portion 45
The contact pressure with the thin plate part 16 is reduced, and the processing of the thick plate part 17 does not prevent the thin plate part 16 from moving in the width direction. By these processes, tentering deformation is effectively performed during processing with the second work roll.

The figure (C) shows the final rolling state with the second work roll, where the intermediate rolled material 13 has a shape that is vertically opposite to the intermediate rolled material 12.

The intermediate rolled material 14 formed in this manner is subjected to substantially the same processing on both the thin plate part and the thick plate part by the mold roll 6 to be shaped into a product having an irregular cross-section strip 15.

[Effects of the Invention] As explained above, according to the present invention, by rolling with one roll with grooves installed alternately on the upper and lower sides, the tentering deformation during rolling is performed more effectively, and therefore a wide thin plate can be formed. In addition, when manufacturing the same product as in the past, the width of the material can be made smaller, making it possible to expand the product range and reduce the amount of material used.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG.
It is an explanatory view showing the rolling state in a work roll. Kaya 1 1 1 ~ 14 15 16 17 2 3 4 41 42 45 5 6 : Material, : Intermediate rolled material, : Irregular cross-section strip, : Thin plate part, : Thick plate part, : First work roll, : First flat roll , :Second work roll, :Flat roll, :Grooved roll, :Grooved roll flat part, 2nd second flat roll, :Mold roll. 1: Kume λbun 11-14: Naka r4 anti-shiba^ 4+:4o-+re5-. Ko 2 + Low I Le et al.: ``I Mouth - I Le

Claims (1)

[Claims] 1. A grooved roll that uses a pair of upper and lower work rolls consisting of a grooved roll and a flat roll to curve the part of the material in the width direction where it should be thicker into the groove, and roll only the part that should be made thinner. In a method for manufacturing a strip of irregular cross-section, which comprises repeating twice or more a rolling process that combines rolling and flat roll rolling to flatten a curved thick plate part, a grooved roll and a flat roll constituting the work roll are A method for manufacturing a strip of irregular cross-section, characterized by sequentially reversing the upper and lower arrangement.