JPH06277761A - Curved surface forming machine - Google Patents

Abstract

PURPOSE:To precisely bend a metal sheet to a required radius of curvature with the beautiful appearance by making a bending roll of a final stage and a bending roll of a 1st stage to rolls with a large diameter. CONSTITUTION:Standing parts of both side peripheries of a long size metal sheet are formed by forming roll groups. Plural groups of bending rolls are arranged in an advancing direction of the metal sheet following to the forming roll groups. Then, at least, the roll of the final stage of the forming roll and, at least, the first stage of the bending rolls are made to rolls with the large diameter. Further, the bending roll group is made to a pair of driving rolls composed of a pressing roll 5 and a receiving roll. A pair of the pressing roll and the receiving roll is attached inside a frame body 7 having a clearance regulating mechanism. Therefore, the metal sheet having the standing parts on both side peripheries and being bent in the longitudinal direction can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate having a rising portion on both side edges when waterproofing a roof or the like with a metal plate such as a stainless steel plate, or to a tip on one side edge. The present invention relates to a curved surface forming machine used when a metal plate having ribs is processed into a curved surface in the longitudinal direction.

[0002]

2. Description of the Related Art Recently, as a waterproofing method for a roof or the like, 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, when the stainless steel plate is bent in the longitudinal direction to a desired radius of curvature on site, bending occurs on both side edges and there is a problem in waterproofness and designability. there were. Conventionally, as a curved surface processing method of this kind of stainless steel sheet, for example, a hand drawing method by a hand former, a processing method of forming a flat surface portion into a ripple to form a flange, a roof bar method of bending with a forming machine, etc. However, when bending is performed by these methods, tensile bending stress acts on the top side of the rising part and compressive bending stress acts on the bottom side, and the obtained curved surface has deformation strain at the bottom side. As described above, the designability is poor and the construction method cannot be said to be good.

In order to solve these drawbacks, the applicant of the present invention has previously proposed a curved surface processing machine (see Japanese Patent Laid-Open No. 3-47630). This processing machine is a curved surface processing machine that bends a long coated metal plate having rising portions on both sides in the width direction in a curved direction in the longitudinal direction, and forms flat portions near the rising portions on both sides of the coated metal plate. While pressing with a pair of pressing rolls, a convex roll having a trapezoidal cross section is formed in parallel with the rising portion by a group of molding rolls provided inside the pressing rolls, and the length of the coated metal is long. A series of bending rolls
The curved surface molding machine is configured to press the flat portion of the coated metal plate with a curl to perform curve molding. However, in this forming and processing machine, the curvature of the curve changes each time due to the processing method in which the reaction force of the trapezoidal convex portion is applied to both side edges, and the bending roller follows the bending roller. Poor reproducibility due to difficulty in positioning the idle roller. Also idol-
Since it was only pressed from above by a roll, it could not be completely plastically deformed, and complete molding was difficult. Furthermore, since the center of the face material after molding rises like a drum, it is sticky and lacks in aesthetic appearance, and the rising parts of the obtained stainless steel plate curved in the longitudinal direction are sequentially seam-welded to waterproof the roof. When processed, trapezoidal protrusions come into contact with the electrodes to cause scratches and the seam welding line meanders up and down, which makes it difficult to perform normal welding.

[0004]

Therefore, the present inventor has completed the present invention as a result of various investigations for solving the above-mentioned drawbacks, and an object of the present invention is to have rising portions on both side edges. Alternatively, the present invention provides a curved surface forming machine for forming a long coated metal plate having a return rib at the tip of one side edge portion into a curved shape with aesthetic appearance.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is to provide, in the longitudinal direction, a long metal plate having rising portions on both side edges in the width direction, or a long metal plate having a return rib at the tip of one side edge. A curved surface molding machine for bending, comprising a group of molding rolls for molding rising portions on both side edges of the elongated metal plate, and this molding roll.
A group of bending rolls for curving and shaping the metal plate subsequent to the group of rolls are arranged in the direction of travel of the metal plate.
At least the final stage roll of the roll and at least the first stage of the bending roll are large-diameter rolls, and the bending roll group is a pair of a press roll and a receiving roll. Drive low
Is a curved surface molding machine. Further, it is preferable that the pair of bending rolls including the pressing roll and the receiving roll be mounted in the frame with a clearance adjusting mechanism.

That is, in the present invention, the central roll of the face material is made flat by making at least the final stage roll of the forming roll group and at least the first stage roll of the bending roll group a large diameter roll. Hold the part to prevent deformation due to strain and maintain a flat shape, and hold it as a bending roll and a receiving roll.
By using a pair of drive rolls as the roller and the rising part, the rising part can be completely pressed down from both sides, and the generated strain is removed by plastic deformation in the rising part, resulting in a curved shape with a beautiful rising part. A metal facing material is obtained. The large-diameter roll means a roll having a large diameter over the entire length of the roll so that the flat part of the metal plate can be pressed without being deformed. Further, the bending roll is a pair of driving rolls composed of a pressing roll and a receiving roll, which makes it possible to completely press the long metal plate during the bending and forming, and Bending can be perfected by plastic deformation. Furthermore, since the frame is mounted with a clearance adjustment mechanism, the frame can be adjusted up and down, the curvature of the face material can be easily set, and especially when the return rib is provided, the left and right clearances can be set. Although it is slightly different, it can be molded by finely adjusting the clearance independently on the left and right.

The present invention will be described with reference to the drawings. The final stage of the forming roll group is shown in FIG. The forming roll has a large diameter roll with a hazel roll and a rebroll on both sides of the large diameter roll.
It is mounted and fixed through the shaft of Le. That is,
The upper hazel roll 1 and the rebroll 2 are on the roll shaft 4 of the large diameter roll 3, and the lower hazel roll 1'and the rebroll 2'are on the large shaft 3 '. The bearings 15 of the roll shaft T, which are mounted and fixed respectively, have a vertical sliding mechanism via a spring. The flat metal plate is inserted into the gap between the hazel rolls 1, 1'and the rerolls 2, 2 ', and is restrained by the respective rolls, as shown in FIG. And a round rib portion E are formed. Further, this process is performed symmetrically, and a metal plate having rising portions on both side edge portions is formed, but the return rib C is formed on the upper portion of one side edge portion.
May be molded.

In order to subsequently bend the metal plate having the round rib-shaped convex portions formed in this manner in the longitudinal direction with a certain curvature, the front end of the metal plate is bent into a group of bending rods. -Thread. As shown in FIG. 3, the bending roll group is composed of a pair of driving rolls of a pressing roll 5 and a receiving roll 6, and these rolls have clearances in respective frame bodies 7. It is mounted on the roll shafts 9 and 10 installed with an adjusting mechanism. Then, each bending roll independently adjusts the clearance. The pressing roll 5 and the receiving roll 6 in the first stage of the bending roll group are the same as the structure shown in FIG. It is not necessary to use the large-diameter rolls 3 and 3 ′ after the second stage.

The clearance adjusting mechanism is shown in FIG. Figure 4
In FIG. 1, the receiving roll 6 is the receiving roll roll shaft 1
No. 0, the shaft is supported by a bearing 8, and the bearing is fixed in the frame 7. The presser roll 5 is mounted on a presser roll shaft 9, and the shaft is axially supported by a bearing 11, which moves up and down in the frame body 7 to form a presser roll and a receiving roll. Adjust the roll gap 12 of. The frame 7 is held slidably in the guide rail 13 by a sliding mechanism 14 provided on the upper part thereof. The left and right clearances can be adjusted independently. The second and subsequent bending rolls also have the same clearance adjusting mechanism, and the position of each bending roll is determined by the sliding mechanism so that the desired curvature can be obtained.

Therefore, the metal plate having the rising portions on both side edges after passing through the forming roll group or the metal plate having the return rib at the tip of one side edge thereof is followed by the large diameter roll on the central surface portion. It passes through the gap between the holding roll and the receiving roll of the first bending roll that is mounted, and into the gap between the holding roll and the receiving roll of the second bending roll. Transition. The position of the gap between the second holding roll and the receiving roll is lower than that of the first holding roll and is curved while removing the strain by the driving roll holding the rising portion. Subsequently, the metal plate is gradually curved in the longitudinal direction as it passes through the gap between the third and fourth bending rollers, and as a result, as shown in FIG.
It is possible to obtain a metal plate which has a rising portion on both side edges and is curved in the longitudinal direction, or a metal plate which is curved in the longitudinal direction and further has a return rib at the tip of one side edge.

[0011]

As described above, according to the present invention,
An effect is obtained that a metal plate having rising portions on both side edge portions or a metal plate further having a return rib at the tip of one side edge portion can be accurately bent to a desired curvature with beauty.

[Brief description of drawings]

FIG. 1 is a metal plate having a rising portion formed by a forming roll portion of a curved surface forming machine of the present invention.

FIG. 2 is a front view of a final molding roll portion and a first stage bending roll portion of the curved surface molding machine of the present invention.

FIG. 3 is a view showing a molding roll portion and a bending roll of the curved surface molding machine of the present invention.
Side view

FIG. 4 is a side view of a bending roll clearance adjusting mechanism portion of the curved surface molding machine of the present invention.

FIG. 5: Curved face material according to the present invention

[Explanation of symbols]

 A, D Flat part B Start-up part C Return rib E Round rib 1, 1'Hazel roll 2, 2 'Reroll 3, 3' Large diameter roll 4, 4 'Roll shaft 5 Bending roll Group holding roll 6 Bending roll Group receiving roll 7 Frame 8 Receiving roll bearing 9 Holding roll shaft 10 Receiving roll shaft 11 Holding roll bearing 12 Bending roll gap 13 Guide roll − Rule 14 Frame sliding mechanism 15 Bearing

Claims (2)

[Claims] 1. A curved surface molding machine for bending in the longitudinal direction a long metal plate having rising portions on both side edges in the width direction, or a long metal plate having return ribs at the tip of one side edge. A group of forming rolls for forming rising portions on both side edges of the elongated metal plate, and a group of bending rolls for curving and forming the metal plate subsequently to the forming roll group are arranged in the traveling direction of the metal plate. Therefore, a plurality of rolls are arranged, at least the final stage roll of the forming roll and at least the first stage of the bending roll are large diameter rolls, and the bending roll group is a pressing roll. A curved surface molding machine, which is a pair of driving rolls including a receiving roll and a receiving roll. 2. The curved surface molding machine according to claim 1, wherein the bending roll comprises a pair of pressing rolls and receiving rolls and is mounted in a frame body having a clearance adjusting mechanism.