JPH0818073B2 - Curved surface processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used for bending a stainless steel plate having rising portions on both sides used in the waterproofing of a roof or the like in the longitudinal direction. Curved surface processing machine.

(Prior Art) Recently, as a waterproofing method for roofs, etc., there is often seen a construction method in which stainless steel plates having rising portions on both sides in the width direction are sequentially joined by welding and the entire roof is roofed. However, when a stainless steel plate is welded by this method, the stainless steel plate is distorted by the welding heat, and the distortion causes the stainless steel plate to wavy, which is not beautiful in design.

In addition, it has been extremely difficult to bend a stainless steel sheet having rising portions on both sides in the width direction in the longitudinal direction to a desired radius of curvature. For example, as a conventional curved surface processing method of a stainless steel plate, there are a hand drawing method by a hand former, a processing method of forming a flange by processing a flat surface portion into a curved surface, and a roof bar method of bending by a forming machine. When bending is performed by the method, tensile bending stress acts on the top side of the rising portion and compressive bending stress acts on the bottom side, and the obtained curved surface causes deformation strain at the bottom side, Similarly, the design is not good and the construction method is not good.

The present inventor has variously studied the curved surface processing machine capable of preventing the occurrence of distortion of such a stainless steel plate and performing favorable bending, and has completed the present invention. It is an object of the present invention to provide a curved surface processing machine capable of automatically and continuously performing bending, and having less distortion in the obtained processed surface.

(Means for Solving the Problem) The gist of the present invention is to provide a curved coating machine for bending a long coated metal plate having rising portions on both sides in the width direction in a longitudinal direction, in a curved metal processing machine. The flat portions near the rising portions on both sides are pressed by a pair of pressing rolls, in parallel with the rising portions by a forming roll group provided inside the pressing rolls, while forming a convex portion having a trapezoidal sectional shape, It is a curved surface forming machine in which the flat portion of the coated metal plate is pressed continuously with a series of bending rolls in the longitudinal direction of the coated metal to perform bending.

The present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a portion forming a trapezoidal convex portion of a curved surface molding machine according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a side view. Inserted into the gap between the pressing rolls 1, 1'while the rising portion B of the coated metal plate A having the rising portions B on both sides is in contact with the guide disc (side roll) 4 mounted on the roll shaft T. To be done. The upper pressing roll is mounted on the roll shaft T, the lower pressing roll 1'is mounted on the roll shaft T ', the rolls 1 and 1'are fixed to the roll shafts T and T', respectively, and the bearing F of the roll shaft T is It has a vertical slide mechanism via a spring Q. The roll shaft T'is provided with a forming roll 2 having a diameter larger than the diameter of the roll 1'which is pressed inwardly close to the pressing roll 1 ', and the roll shaft T is provided with a forming roll 3 inside. There is. The coated metal plate inserted in the gap between the pressing rolls 1,1 'is constrained by the pressing rolls 1,1' and the forming roll 2 to form a downward trapezoid having a rising portion B, a flat portion G and a shaded portion E. At the same time, the forming rolls 2 and 3 form the flat portion C, the slanted portions D and E, and the flat portion A of the coated metal plate to form a convex portion together with the downward trapezoid (see FIG. 4).

In this way, in order to subsequently bend the coated metal plate having the trapezoidal convex portions with a certain curvature, the tip of the coated metal plate is passed through a group of bending rolls.

A group of bending rolls J _{1 to} J ₄ (consisting of ₄ rolls in the drawing) are provided with bending roll shafts R _{1 to} R ₄ each having a slide mechanism on a bending roll frame K and each of which is provided with an idler roll in stages. It is installed and configured. The bending roll frame body is attached to the frame base M by a bending roll frame rotation axis H. Each bending roll shaft is adjusted by a slide mechanism using the adjusting screw I so that a curved surface having a predetermined curvature can be obtained. The coating metal having the trapezoidal ridges formed by the forming rolls is subsequently pressed by the bending rolls and sequentially bent. As a result, the coated metal plate has a shape as shown in FIG. 5, and a dome-shaped envelope can be formed by sequentially welding the upper edges of the rising portions of the coated metal plate having this curved surface. (See FIG. 6).

(Effects) As described above, according to the present invention, when a stainless steel plate having rising portions on both sides is bent in the longitudinal direction, a trapezoidal ridge portion is formed in parallel with the rising portions in the longitudinal direction. By bending the curved surface, the strain generated during bending appears extremely uniformly in the slanted portion of the trapezoidal convex portion, so bending can be performed without causing large strain as in the conventional case, and therefore, Even a waterproof treatment of a curved roof made of a stainless steel plate can be easily performed without damaging the appearance in any way.

[Brief description of drawings]

FIG. 1 is a sectional view of a curved surface forming machine according to the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 is an enlarged view of a forming roll portion, and FIG. 5 is a formed metal-coated plate. FIG. FIG. 6 is a side view of a dome-shaped roof formed by using the obtained coated metal plate having a curved surface. 1,1 ′ …… Pressing roll, T, T ′ …… Forming roll shaft 2,3 …… Forming roll, J _{1 to} J ₄ …… Bending roll 4 …… Guide disc, R _{1 to} R ₄ …… Bending Roll shaft A: metal-coated plate, B: rising part

Claims (1)

[Claims] 1. In a curved surface processing machine for bending a long coated metal plate having rising portions on both sides in the width direction in a longitudinal direction, a flat portion in the vicinity of the rising portion on both sides of the coated metal plate is formed. Pressed with a pair of pressing rolls, a forming roll group provided inside the pressing rolls forms a convex part having a trapezoidal cross-section in parallel with the rising part while continuously forming a longitudinal direction of the coated metal. A curved surface forming machine that presses the flat part of the coated metal plate with the bending roll to perform curved forming.