JPH0347630A - Curved surface working machine - Google Patents

Abstract

PURPOSE:To bend a coated plate without generating a large distortion by forming trapezoidal projecting parts with forming rolls in parallel with rise parts as flat parts near the rise parts on both sides of a coated plate are pressed by a pair of rolls and bending the plate in the lengthwise direction with bending rolls. CONSTITUTION:The coated metallic plate A inserted between presser rolls 1, 1' is restrained by the presser rolls 1, 1' and a forming roll 2 to make a downward trapezoid composed of the rise parts B, the flat parts G and oblique line parts E. At the same time, the flat parts C, the oblique line parts D, E, the flat part of the coated metallic plate A are formed by the forming rolls 2, 3 and projecting parts are formed together with the former downward trapezoid. Then, the coated metallic plate A is passed through a group of bending rolls J1 - J4 and the coated metallic plate A where a trapezoidal projecting part are formed is pressed by the bending rolls J1 - J4 and bent in sequence.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is used for longitudinally bending a stainless steel plate having upright portions on both sides, which is used when performing stainless steel waterproofing on roofs, etc. Regarding curved surface processing machines.

(Conventional technology) Recently, as a waterproofing method for roofs, etc., a method of roofing the entire roof by sequentially connecting stainless steel plates with raised parts on both sides in the width direction by welding has been seen. However, when stainless steel plates are welded using this method, the welding heat causes distortion in the stainless steel plates, and this distortion causes the stainless steel plates to appear wavy, which is not aesthetically pleasing.

Further, it is extremely difficult to curve a stainless steel plate having raised portions on both sides in the width direction to a desired radius of curvature in the longitudinal direction. For example, conventional curved surface processing methods for stainless steel plates include hand drawing using a hand former, processing a flat surface into a curved surface to create a flange, and tile rod method bending using a forming machine. When curve forming is performed using this method, tensile bending stress acts on the top of the rising part, and compressive bending stress acts on the bottom of the rising part, resulting in deformation strain occurring at the bottom of the resulting curved surface, resulting in the above-mentioned problem. Similarly, the design quality is poor, and the construction method cannot be said to be good.

The present inventor completed the present invention as a result of various studies regarding a curved surface processing machine that can prevent the occurrence of such distortion in stainless steel sheets and perform good bending processing, and the purpose of the present invention is to: To provide a curved surface processing machine that can automatically and continuously perform bending and generate less distortion on the obtained processed surface.

(Means for Solving the Problems) The gist of the present invention is to provide a curved surface processing machine that performs curve forming in the longitudinal direction of a long coated metal plate having rising portions on both sides in the width direction. While pressing the flat parts near the rising parts on both sides with a pair of press rolls, a convex part having a trapezoidal cross-sectional shape is formed in parallel with the rising parts by a group of forming rolls provided inside the press rolls, and This is a curved surface forming machine that presses the flat part of a coated metal plate continuously in the longitudinal direction of the coated metal plate using a series of bending rolls to form a curved shape.

The invention will be explained with reference to the drawings. FIG. 1 is a sectional view of a portion constituting a trapezoidal convex portion of a curved surface forming machine according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a side view. The raised parts B of the coated metal plate A having raised parts B on both sides are inserted into the gap of the presser roll 1.1' while contacting the guide disk (side roll) 4 mounted on the roll shaft T. be done. The upper presser roll is mounted on the roll shaft T, the lower presser roll 1' is mounted on the roll shaft T', and the roll 1.1' is mounted on the roll shaft T, respectively.
'r' and the bearing F of the roll shaft T is fixed to the spring Q
It has an up and down sliding mechanism through. Roll shaft T
A forming roll 2 having a diameter larger than the diameter of the presser roll 1' is provided inwardly adjacent to the presser roll 1', and a forming roll 3 is provided inside the roll shaft T. The coated metal plate inserted into the gap between the presser rolls 1.1' is restrained by the presser rolls 1.1' and the forming rolls 2, forming a downward trapezoid consisting of a rising portion B, a flat portion G, and a hatched portion E. At the same time, the forming rolls 2 and 3 form the flat part C1, the diagonal part E, and the flat part A of the coated metal plate.
is formed, and forms a convex portion together with the downward facing mortar shape at the tip (see Fig. 4).

In order to subsequently bend the coated metal plate having a trapezoidal convex portion thus formed 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-J4 (consisting of four rolls in the drawing) is constructed by installing idler rolls in stages on bending roll shafts R1 to R4 each having a sliding mechanism in the bending roll frame K. has been done. The bending roll frame body is attached to a frame M by a bending roll frame rotation axis H. Each bending roll shaft is adjusted by a sliding mechanism using an adjustment screw (2) so that a curved surface with a predetermined curvature is obtained. The coated metal on which the trapezoidal convex stripes have been formed by the forming rolls is then pressed by bending rolls and sequentially bent. As a result, the coated metal plate has a shape as shown in Fig. 5, and by sequentially welding the upper edge of the raised portion of the coated metal plate having a curved surface, a dome-shaped outer envelope can be formed. (6th
(see figure).

(Effects) As described above, when a stainless steel plate having raised portions on both sides is bent in the longitudinal direction, a trapezoidal convex strip is formed in parallel with the raised portions while the stainless steel plate is bent in the longitudinal direction. By curving, the strain that occurs during curving appears extremely uniformly in the shaded area of the trapezoidal convex part, so bending can be performed without causing large distortions as in the past. Even when waterproofing a curved roof using steel plates, it can be easily done without damaging the appearance in any way.

[Brief explanation 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 the forming roll portion, and Fig. 5 is a formed metal-coated plate. FIG. FIG. 6 is a side view of the dome-shaped roof formed with the resulting curved covered metal plate.

Claims (1)

[Claims] 1. In a curved surface processing machine that curves a long coated metal plate having rising portions on both sides in the width direction in the longitudinal direction, the flat portions near the rising portions on both sides of the coated metal plate are held down by a pair of pressers. While pressing with a roll, a convex part with a trapezoidal cross-section is formed in parallel with the rising part by a group of forming rolls provided inside the pressing roll, and a series of bending rolls are continuously formed in the longitudinal direction of the coated metal. A curved surface forming machine that presses the flat part of a coated metal plate to form a curved shape.