JP2501747B2 - Corrugated sheet bending machine - Google Patents

Description

Detailed Description of the Invention

[0001]

Detailed Description of the Invention

The present invention relates to a waveform bending pressurized KoSo <br/> location of the steel sheet. For details, use a steel plate with four folding curves.
The present invention relates to a device for bending into a rough shape.

[0002]

As shown in Prior Art FIG. 4, there is Hakoketakyo 100 to the waveform steel 101 with web 102. The box girder bridge 100 using such a corrugated steel plate web 102 has the following excellent features. (1) The weight of the web 102 is reduced. For example, in an ordinary PC bridge, the weight of the web is 20 to 30% of the total weight of the main girder.
This web 102 is lighter in weight and can significantly reduce the weight of the main girder. (2) The shear buckling strength of the web 102 is significantly increased as compared with the steel plate girder. The web 102 can be made thin and the buckling strength can be increased by increasing the height of the corrugations. (3) Due to the accordion effect of the corrugated steel sheet 101 that resists shearing force and does not bear the axial force due to prestressing,
The pre-stress does not dissipate in the web 102, so that the web 102 can be surely introduced into a desired portion. (4) The web 102 does not restrain the creep, drying shrinkage, or temperature change of the concrete floor slab, and the deformation is free. (5) The corrugated pattern gives a good accent and has the effect of enhancing the impression of the bridge.

The corrugated steel plate has a working material of rolled steel for general structure or rolled steel for welded structure, and has a working width of up to 3
A corrugated plate having a pitch of about 700 to 1200 mm and a depth of about 150 to 200 mm is formed on a steel plate having a thickness of about 000 mm and a maximum plate thickness of about 19 mm. Since such a corrugated steel sheet is produced in a small amount, a press is used each time, and the steel sheet is sequentially bent while inverting the front and back of the sheet. That is, the procedure for corrugating a conventional steel sheet is as follows. i) The press machine was a general-purpose type 100 ton press, and a jig for processing the bent portion of the steel plate was manufactured. ii) Since it is necessary to press from both sides of the member,
With the reversal of members. Therefore, the member length is limited to about 1500 mm at maximum. iii) Corrugated steel sheets are welded at the factory and the total length is 7
It was shipped by connecting to about 800 mm.

In the above-mentioned work, since the front and back of the steel sheet are inverted for each press forming, the length of the steel sheet that can be processed is restricted to about 1500 mm or less, and the forming work is troublesome, and the accuracy of the waveform is high. Was not too high.

[0005]

The present invention is not a mass-produced product under the conditions described above, that is, a production request to a steel maker, but a production lot for constructing a bridge is collected to some extent. under the manufacturing circumstances of the need, and an object thereof is to provide a waveform bending pressurized KoSo location of the steel sheet.

[0006]

[Means for Solving the Problems]

[0007] The onset Ming, cross-section and a male convex shape trapezoidal,
It is composed of a concave trough-shaped female mold whose cross-section matches a male trapezoid, and the female mold is composed of both side blocks forming the slope of the trough and a central member forming the bottom surface of the trough, and the central member is is pin-coupled to the opposite sides blocking both ends, concave when each side blocks and the central member is its upper surface on both sides block is turning so that the horizontal one plane, the male is lowered when the male is rising There is provided a corrugated bending apparatus for a steel plate, which is provided with a mechanism for rotating the both side blocks so as to form a trough shape.

Also, the male mold of the mechanism of this apparatus may be fixed to the lower side , and the both side blocks may be rotated while descending to bend the steel sheet.

[0009]

The present invention has a thickness of about 6 to 19 mm and a width of 1500.
〜3000mm steel plate pitch 700〜1200m
This is a technique for forming a trapezoidal trough-shaped repetitive waveform having a depth of approximately m and a depth of approximately 150 to 200 mm. The length steel sheet L, as shown in FIG. 3 (a), if the bending in a press into a trough shape as shown in FIG. 3 (b), 4 pieces of folding lines 10
A, 10b, 10c and 10d are simultaneously bent. In this case, the length L is shortened to L ', so that tension is generated in the direction traversing the trough shape. What slave <br/>, when such bending, it is necessary machining method and apparatus does not restrict the tension.

In the present invention, trough-shaped bending as shown in FIG. 3 is performed for each pitch of the waveform. Therefore, in addition to the feeding device that moves the steel plate in 1-pitch troughs,
In the trough forming process of a steel plate, lateral movement commensurate with the reduction of the steel plate length is required as the troughing process progresses. The apparatus of the present invention is provided with a mechanism for rationally moving the steel sheet laterally in association with this troughing.

[0011]

EXAMPLE FIG. 1 is a corrugated bending process of a steel plate according to an example of the present invention.
It is a figure which shows the bending method by an apparatus . First, this bending apparatus will be described. The male die 1 has a convex trapezoidal cross section. In the female mold 2, both side blocks 4 and 4 are connected by a central member 5 by a pin 6, and the both side blocks 4 and 4 are mounted on a surface plate 3. Both side blocks 4 and 4 are members that form the slope of the corrugated trough, and the central member 5
Form the bottom of the trough. Both side blocks 4 and 4 roll around a pin 6. As shown in FIG. 1A, when the male die 1 is raised, the upper surfaces of the side blocks 4 and 4 and the central member 5 are in a straight line. Then, the steel plate 10 to be corrugated is placed on the female mold 2. As shown in FIG. 1 (b), the male mold 1
Is lowered downward as shown by arrow 7, both side blocks 4, 4 turn around as shown by arrow 8, and both side blocks 4,
4 and the central member 5 form a trough shape, and cooperate with the male die 1 to form a trough-shaped groove 11 in the steel plate 10. As shown in FIG. 1 (c), when the male die 1 moves up in the direction of the arrow 9, the female die 2 turns around again and lifts the steel plate 10. Therefore, as shown in FIG. 1 (d), the steel plate 10 is moved laterally by one pitch (to the left in the drawing), and the male die 1 is lowered again, as shown in FIG. 1 (e). , Repeat molding.

The conditions for corrugating a steel sheet are as follows. i) Processing material Rolled steel material for welded structure ii) Processing width (girder height) maximum 2500 mm iii) Processing length (girder length) maximum 8000 mm iv) Plate thickness 12 mm v) Continuous processing is performed using a hydraulic press.

Using the above apparatus, corrugated steel sheets were processed by the steps shown in FIG. The female central member 5 is lowered by the male downward movement. As the central member 5 descends, the blocks 4 and 4 on both sides rotate about the pin 6 to form a trough groove on the steel plate 10. An important point is that the steel sheet 10 is allowed to move laterally and is not restrained until the trough shape is formed, that is, until the maximum pressing force is applied. The corrugation is centered by aligning the center line of the female center member 5 with the reference line of the steel plate. The apparatus of Example 1 can perform continuous and uniform corrugation, and simultaneously bends four folding curves without constraining the steel sheet, so that the pressing force can be reduced by the amount that tension is not generated in the steel material. it can. The above-described processing of Example-1 can be similarly performed by the apparatus of FIG. 2 in which the male die and the female die are vertically replaced.

[0014]

[0015]

[0016]

EFFECTS OF THE INVENTION In the method for corrugating a steel sheet according to the present invention, it is not necessary to turn the front and back of the steel sheet by devising a press die, so that the conventional steel sheet length is 1500 m.
Although it was limited to about m or less, it became possible to perform corrugation processing on a commercially available steel sheet up to a longitudinal dimension of 8000 mm. Therefore, the production efficiency can be improved and a desired corrugated steel sheet having an accurate shape can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a method for corrugating a steel sheet by a device according to an embodiment.

FIG. 2 is a diagram showing a method of corrugating a steel sheet by the apparatus of the embodiment.

FIG. 3 shows a corrugated bending method for a steel plate by the device of the present invention .
It is an operation explanatory diagram.

FIG. 4 is a perspective view of an example of a box girder bridge using a corrugated steel plate as a web .

[Explanation of symbols]

1 Male Type 2 Female Type 3 Surface Plate 4 Both Sides Block 5 Central Member 6 Pin 7 Arrow (Downward Direction) 8 Arrow (Rotating Direction) 9 Arrow (Upward Direction) 10 Steel Plate 11 Groove (Trough) 100 Box Girder Bridge 101 Corrugated Steel Plate 102 The web

Claims (2)

(57) [Claims] 1. A male die having a convex trapezoidal cross section and a cross section having
It consists of the male trapezoid and the concave trough-shaped female die.
The female mold is a double-sided block and a trough that forms a trough slope.
Consisting of a central member forming the bottom surface of the
Both ends are pin-connected to the both side blocks, and the male type is on top.
Both sides of the block and center member are
Both sides of the block are rotated around the pin so that it becomes a horizontal plane.
Turns into and forms a concave trough when the male mold descends
A mechanism in which the blocks on both sides roll around the pin
A corrugated bending apparatus for steel plates, which is provided with: 2. A mold having the same shape as the male mold and the female mold is arranged in the array.
And the female mold is raised and lowered by arranging it upside down.
The corrugated bending apparatus for a steel sheet according to claim 1 .