JPS6045014B2 - Forming method of corrugated plate - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for forming a corrugated metal plate.

The conventional method of forming a corrugated plate is as shown in FIG.
One wave is formed by pressing a workpiece 1 against a die 2 having a groove 4 using a punch 3 having a groove 4, and a corrugated plate is formed by sequentially performing this process. In this method, during machining, the longitudinal direction of the workpiece 1 is Since the frictional resistance between the workpiece 1 and the punch and die is large as the punch and die slip in the direction (left and right in Fig. 1), the life of the punch 3 and die 2 is short, especially when the height of waves is large. The protrusion 5 was easily broken. If the frictional resistance differs between the left and right sides of the protrusion 5, the workpiece 1 will slip on the tip of the protrusion 5, reducing the pitch accuracy of the waveform. Furthermore, since the workpiece 1 moves up and down significantly outside the punch and die during processing, it is difficult to hold the workpiece, making it impossible to manufacture long corrugated plates. In the method of the present invention, a plate material is gripped by a first gripping means that grips the plate material before processing, and a second gripping means that grips the plate material after processing at at least two positions spaced apart by an integral multiple of the processing pitch. , a mold placed between these gripping means is pressed against the plate material, and both gripping means are brought close to each other to form one wave, and this forming is repeated one after another to form a corrugated plate. It is characterized by: Reference will now be made to the accompanying drawings, which illustrate apparatus suitable for carrying out the invention. In FIG. 2, the upper slide 7, the chuck 11, and the lower slide 15 form one unit by a guide post 13 fixed to the upper slide 7, and the inclined sliding surface of the chuck 11 is connected to the upper plate. It cooperates with the inclined sliding surface of the side plate 9 fixed to the side plate 8.

When the upper plate 8 moves downward in the figure, the chuck 11 first approaches the lower slide 15 and grips the workpiece between them, and when the upper plate 8 moves further downward, the units 7, 11, 15 move toward the inclined sliding surface. to the left along the contact surfaces between the upper plate 8 and the upper slide 7 and between the lower slide 15 and the die block 16. A spring 10 is provided between the upper slide 7 and the chuck 11 to provide a substantially constant workpiece gripping force. A rod 14 fixed to the side plate 9 is connected to a stopper 17 via a lever 18, and the stopper 17 is pushed upward by a spring 19. The illustrated device is symmetrical about the centerline 30, with the left half having a similar configuration to the right half.

A spring 23 acts between the upper slide 7 of the right half and the upper slide 7'' of the left half and presses the units 7, 11, 15 against the side plate 9 (or stopper 17 as described below). Spring 22 A punch 21 is provided along the center line 30 and is pressed upwardly by the punch 21. In order to control the upward movement of the punch 21, a rod is fixed to the upper plate 8 as shown in FIG. 26 and the lower plate 20
A pole 26 is slidably attached to a post 25 fixed to a pole 26.
and a lever 24 connecting the punch 21 and the punch 21. is provided. The steps of the method of the present invention using the molding apparatus shown in FIGS. 2 and 3 will be explained with reference to FIGS. 4 1 to 4.
Nine waveforms have already been formed on the right half of the workpiece 1, the upper plate 8 is in the second raised position, and the gap between the chuck 11 and the lower slide 15 is open.

When the upper plate 8 is lowered from this initial state, the chuck 11
grips the workpiece 1 between the lower slide 15 and the lower slide 15.

At this time, chuck 1 on the left half is also lower slide 1 in the same way.
5''.The gripping force at this time is controlled by the spring 10.As the upper plate 8 descends, the punch 21 is moved through the rod 26 and the lever 25. The upper plate 8 rises to the state shown in FIG.
When the slider lowers, sliding occurs on the sliding surface between the side plate 9 and the chuck 11, and the chuck 11 slides over the upper slide 7,
The workpiece 1 moves horizontally toward the center line 30 together with the lower slide 15, and at the same time the punch 21 rises under the force of the spring 22, so that the workpiece 1 is moved between the gripping portion of the chuck 11 and the lower slide 15 and the chuck 1''. and the gripping portion of the lower slide 15''. (Situation in Figure 4 3). In the illustrated embodiment, the chuck 11 grips the workpiece at two separate locations, but the gripping portion directly related to the bending action described above is of course adjacent to the punch 21, and the gripping portion far from the punch 21 is the gripping portion that is directly related to the bending action described above. There are only 7 portions that assist in maintaining the flatness of the workpiece 1 as a whole. Furthermore, the fourth
FIG. 3 shows a state in which the bending is completed, and the stopper 17
protrudes from the surface of the die block 16 and engages with the lower slide 15. In this way, units 7, 11, 1
5 precise positioning becomes possible. Positioning can also be facilitated by providing a taper at the tip of the stopper 17. When the upper plate 8 rises, the upper slide 7 rises, and the stepped portion of the guide post 13 causes the chuck 11 to rise.

The punch 21 descends to the state shown in FIG. 4. When the upper plate 8 further rises, the stopper 17 is removed and the upper slide 7, chuck 11, and lower slide 15 are returned to the initial state shown in FIG. 4 by the spring 23. In this step, the workpiece 1 is fed by one pitch of the waveform, and as shown in FIG.
A corrugated plate is formed by repeating the steps shown in FIG. As explained in detail above, according to the present invention, two of the plates
Since the bending is performed by gripping the parts and moving the gripping parts close to each other in the longitudinal direction of the board, no force is applied to the punch, and it is also possible to form corrugated boards with large wave heights. It is easy and the punch has a long life.

Since the workpiece is gripped and positioned by a chuck, pitch accuracy is good, and movement of the workpiece in any direction other than the longitudinal direction is restrained and prevented, resulting in good workability. The corrugated plate according to the present invention can be used not only as a normal corrugated plate, but also in fields where corrugated plates have not been used conventionally, such as escalator steps.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a conventional corrugated plate forming apparatus, FIG. 2 is a vertical sectional view showing the right half of a forming apparatus suitable for carrying out the method of the present invention, and FIG. partial side view of the device;
1 to 4 are schematic diagrams showing the operation of the apparatus shown in FIGS. 2 and 3 for each step. 1...Work material, 7...Upper slide,
8...Soil plate, 9...Side plate, 11...Chuck, 13...Guide post, 15...Lower slide, 21 ...
...Ponchi.

Claims (1)

[Claims] 1. A first gripping means for gripping the plate material before processing, and a second gripping means for positioning and gripping the plate material after processing by at least two gripping parts provided apart from each other by an integral multiple of the processing pitch. Therefore, while gripping the plate material and pressing a mold placed between the first and second gripping means against the plate material from the thickness direction of the plate material, the first and second gripping means are held together. A method for forming a corrugated plate, characterized in that a corrugated plate is formed by forming one wave in close proximity and repeating this forming one after another.