JPS6320612B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a stepped corrugated metal plate, and more particularly, to a metal plate having a corrugated cross section, a stepped portion perpendicular to the direction of wave undulation is formed in the metal plate. This relates to a manufacturing method for providing the plates at regular intervals along the length of the plate.

[Conventional technology]

Conventionally, as a method for providing a long corrugated metal plate with step portions perpendicular to the direction of wave undulation at regular intervals in the length direction of the metal plate, for example, Japanese Patent Application Laid-open No. 105821/1983 discloses a method. Two sets of clamping tools, an upper and a lower pair, each having a corrugated surface of the same shape as the metal plate on opposing surfaces, are arranged in front and behind each other so that the corrugated metal plate can be clamped between the two sets of clamping tools. By pressing down the upper or lower clamp tool on either the front or rear side while being clamped between the upper tool and the lower tool, a step is created on the metal plate by the step between the front clamp tool and the rear clamp tool. Methods of forming are known.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional processing method, when bending and forming a step on a metal plate, both sides of the step are firmly clamped between a pair of upper and lower front clamp tools and a rear clamp tool, respectively, without loosening. In order to press down one of the front and rear clamp tools in the attached state, the stepped portion of the metal plate that occurs at the boundary between the front and rear clamp tools is formed exclusively by stretching the metal thinly. Of course, the corrugated metal plate formed in this manner has a problem in that it is easily broken because the thickness of the stepped portion is thinner than the thickness of the portion other than the stepped portion.

[Means for solving problems]

The present invention solves the problems of the conventional processing methods as described above, and provides a processing method that makes it possible to easily form a precise stepped part on a corrugated metal plate with an extremely thin wall thickness without being stretched. The purpose is to provide

In the present invention, with both sides of the metal plate centered around the stepped part being clamped between the clamp tools, when one of the front and rear clamp tools is slid downward, the clamped metal plate is moved between the clamp tools. The gist of this is to allow both the front and rear clamp tools to slide relative to each other in the step forming direction at the intermediate portion to an extent that does not interfere with attachment and retention.

As a means for that purpose, the present invention includes a stepped upwardly movable mold table having a corrugated metal plate disposed on the lower surface of the press apparatus, and a front movable receiving mold and a rear fixed press mold each having a corrugated surface of the same shape as the metal plate. , the metal plate is fed between a lower fixed mold table having a front fixed press mold and a rear movable receiving mold each having a corrugated surface, and then the upper movable mold table is lowered by the press device and the metal plate is pressed into the upper movable mold. The front movable receiving mold and the front fixed pressing mold are sandwiched between the front and back molds of the table and the front and back molds of the lower fixed mold table, and as the upper movable mold table receives the pressing force from the press device, the front movable receiving mold and the front fixed pressing mold are , the front movable receiving mold receives the reaction force from the corresponding lower front fixed pressing mold and absorbs the pressing force while maintaining the sandwiched state of one end of the metal plate on the front fixed pressing mold, and on the other hand, the back fixed pressing mold A movable back mold is a movable back mold that lowers the fixed back mold to a predetermined position while absorbing the pressing force from the fixed back mold on the upper surface and maintaining the sandwiched state of the other end of the metal plate. The metal plate is characterized in that a stepped portion is formed in the longitudinal direction of the metal plate by a stepped portion formed at the boundary between the front fixed press mold of the lower fixed mold table and the rear fixed press mold of the upper movable mold table.

[Effect]

In the manufacturing method according to the present invention, a corrugated metal plate is placed between an upper movable mold base and a lower fixed mold base,
The upper movable mold table is pushed down by the press device. When the upper movable mold table is pressed down, the front movable receiving mold on the front side of the upper movable mold table absorbs the pressing force by receiving a reaction force from the front fixed press mold on the lower fixed mold table located below. While holding one end of the metal plate, further settling of the front movable receiving mold is stopped.

On the other hand, on the back side of the upper movable mold base, the back fixed press mold pushes down the back movable receiving mold on the lower fixed mold base located below, and the back movable receiving mold is pushed down from the upper back fixed press mold. While absorbing the force, it sinks down to the position where the downward force of the upwardly movable mold table is applied, with the other end of the metal plate being clamped.

Due to the downward force of the upper movable mold table, the front movable receiving mold on the upper movable mold table is prevented from settling in a predetermined position by the lower front fixed press mold,
The fixed back mold on the upper movable mold table compresses the lower movable back mold to a predetermined position and sinks, thereby creating a step between the front side and the back side of the upper movable mold table and the lower fixed mold table. A stepped portion is formed in the stepped portion of the sandwiched metal plates.

〔Example〕

Next, a method for manufacturing a stepped corrugated metal plate according to the present invention will be explained based on an embodiment shown in the drawings. FIG. 1 shows a corrugated metal plate 1 which has been previously formed into a corrugated cross-section by forming rolls for use in the processing method of the present invention and is cut to a specific length.

FIG. 2 shows a press mechanism for forming a step on the corrugated metal plate 1. As shown in FIG. This press mechanism includes a press device 2 and a stepping die 3 inside the press device 2, and an intermittent feed mechanism 4 such as a feed roll or a pusher disposed in front of the press device 2 to move the corrugated metal sheet 1 into a predetermined position. Pressing device 2 at regular intervals set based on length or time.
It is designed to be fed into the stepped mold 3 inside.

As shown in FIGS. 3 and 4, the stepped press die 3 is mounted on an upper movable die table 7 that moves up and down integrally with the pressurizing part 5 of the press apparatus 2, and on a base 6 of the press apparatus 2. It consists of a lower fixed type base 8 to which it is fixed.

Furthermore, the above-mentioned upper movable mold table 7 is composed of a front movable receiving mold 9 on the side facing the feeding mechanism 4 and a rear fixed press mold 10. Both the front movable receiving mold 9 and the back fixed pressing mold 10 are integrally supported by a single upper plate 11, and the lower surface of each mold has a shape that matches the waveform of the corrugated metal plate 1. Mold 1
2 and 13 are attached separately.

Further, the front movable receiving mold 9 of the upper movable mold base 7 is connected to a hydraulic cylinder 1 fixed to the lower surface of the plate 11.
It has a structure in which it is moved by the piston rod 15 of 4, and the back fixed press mold 10 is moved by the plate 11.
It consists of plates 16 arranged in a grid pattern on the lower surface of the . As shown in FIG. 4, the front movable receiving mold 9 and the back fixed pressing mold 10 are slidably mounted on guide poles 19 and 20 that have brackets 17 and 18 that project on both sides and are erected on the sides. The guide poles 19 and 20 are fitted together to move up and down together with the operation of the pressurizing section 5 of the press device. In this case, the front movable receiving mold 9
is a hydraulic cylinder 1 fixed to a plate 11
4, it is possible to independently move up and down along the guide poles 19, 20.

On the other hand, the lower fixed type table 8 is the upper movable type table 7.
It consists of a front fixed press mold 21 located directly below the front movable receiving mold 9 and a back movable receiving mold 22 located directly below the rear fixed press mold 10 on the upper movable mold table 7, both of which are installed on the base 6. They are integrally attached on a single plate 23. The front fixed die 21 consists of a base 24 formed of a grid-like plate placed on a plate 23, and does not itself move at all. On the other hand, the rear movable receiving mold 22 is structured to be able to freely move in the vertical direction by a piston rod 26 of a hydraulic cylinder 25 fixed to a plate 23. Both of the front fixed press mold 21 and the rear movable receiving mold 22 have molds 27 and 28 fixed to their upper surfaces, respectively, to match the waveform of the corrugated metal plate 1. This rear movable receiving mold 22 has brackets 29 provided on both sides that connect to the side guide poles 19, 2.
0, and by operating the hydraulic cylinder 25, the guide poles 19, 20
It is designed to be able to move up and down along the

The upper movable type table 7 and the lower fixed type table 8 basically have the above-mentioned structure, but in consideration of the practical problem of providing an accurate step on the corrugated metal plate 1, , the back fixed press mold 10 of the upper movable mold table 7
The mold 13 attached to the mold 13 and the mold 27 attached to the front fixed press mold 21 of the lower fixed mold base 8 have their depths and widths equal to the mold 28 of the corresponding back movable receiving mold 22 and the mold 27 of the front movable receiving mold 22, respectively. The depth width of the mold 9 is slightly larger than that of the mold 12, and tapered surfaces 30 and 31 are provided at the opposing inner ends of the molds 13 and 27, respectively.

When the corrugated metal plate 1 is fed between the upper movable mold table 7 and the lower fixed mold table 8 by the feeding mechanism 4, the upper movable mold table 7 is pressed by the press device 2, as shown in FIG. The mold 12 of the front movable receiving mold 9 on the upper movable mold table 7 is in the state of being pulled up by the section 5.
is caused to protrude below the mold 13 of the back fixed press mold 10 by the operation of the hydraulic cylinder 14, contrary to the position shown in FIG. Further, as shown in the same figure, the rear movable receiving mold 22 on the lower fixed mold base 8 also operates the hydraulic cylinder 25, and the mold 28
is pushed up to the same height as the mold 27 of the front fixed press mold 21.

In this state, when the upper movable mold table 7 is pushed down by the pressurizing part 5 of the press device 2, the front movable receiving mold 9 on the upper movable mold table 7 is pressed down as shown in FIG. 5b.
The mold 12 receives the reaction force from the front fixed press die 21 on the lower fixed mold base 8, and the rear fixed press die 10
The corrugated metal plate 1 is pushed back upward to the same level as the mold 13 of
2 and a mold 27 and between the mold 13 and a mold 28.

Further, when the upper movable mold table 7 is pushed down from this state by the pressurizing part 5 of the press device 2, the front fixed press die 21 of the lower fixed mold table 8 is arranged on the lower side of the front side of the upper movable mold table 7. The mold 12 of the movable front mold 9 is not pushed down any further, and the piston rod 15 supporting the movable front mold 9 is pressed against the hydraulic cylinder 14. Pushed inside.

However, as shown in FIGS. 5c and 5d, on the back side of the upper movable mold table 7, the back fixed press mold 10 is arranged on the upper side, and the rear movable receiving mold 22 of the lower fixed mold table 8 is arranged below it. Therefore, the upper fixed back mold 10 still applies the downward force, and the lower movable back mold 22 resists the upward force of its hydraulic cylinder 25 to form the mold shown in FIG. 5b. Push down further below the level of 13. In this way, the lower fixed mold base 8 has a front fixed press mold 21 on the front side that blocks the downward force of the upper movable mold base 7, and a rear movable receiving mold 22 on the rear side that follows the downward force of the upper movable mold base 7. Therefore, due to the pressing force of the upper movable mold base 7, a step is created between the front side and the back side of the lower fixed mold base 8, and the metal plate clamping level on the front side and the metal plate clamping level on the back side are different. A stepped portion 32 is formed on the corrugated metal plate 1 due to the difference in level.

When forming the step portion 32, tapered surfaces 30 and 31 are provided on the opposing surfaces of the mold 13 of the back fixed press mold 10 on the upper movable mold table 7 and the mold 27 of the front fixed press mold 21 on the lower fixed mold table 8, respectively. As a result, the sandwiched corrugated metal plates 1 have both opposing tapered surfaces 30, 3 as shown in FIG.
1, and when the mold 13 of the back fixed pressing mold 10 on the upper movable mold table 7 is pushed down to the final position as shown in FIG. 5d, both tapered surfaces 30 ,3
By being compressed between 1 and 2, a precise stepped portion 32 is formed.

As mentioned above, the upper movable type table 7 and the lower fixed type table 8
The respective molds 12, 27 and 1 in
3 and the corrugated metal plate 1 sandwiched between the mold 28
When the stepped portion 32 is formed by the downward force of the upper movable mold table 7, the corrugated metal plate 1 is stretched by the height of the stepped portion 32 to be formed. The stronger the clamping pressure of the metal plate between the upper and lower molds, the more securely the step 32 can be formed, but the thinner the metal wall of the step 32 becomes, the more likely it is to break.

In response to such phenomena, the processing method of the present invention
On the front side, the front movable receiving mold 9 of the upper movable mold base 7 absorbs the reaction force from the lower front fixed press mold 21 against the downward force of the upper movable mold base 7, and on the back side, the lower fixed mold base 8 absorbs the reaction force from the lower front fixed press mold 21. Since the back movable receiving mold 22 absorbs the pressing force from the upper fixed back pressing mold 10, compared to the pressing force of the upper movable mold table 7 by the pressing section 5 of the press device 2, the movable receiving mold 22 absorbs the pressing force from the upper fixed pressing mold 10. By slightly relaxing the pressure of the hydraulic cylinders 14 and 25 at points 9 and 22 within a range that can maintain the sandwiched state of the metal plates, the metal plate clamping surface on the front side and the rear side around the stepped portion 32 are separated. It is possible to give the metal plate 1 sliding in the direction of the stepped portion 32 on the metal plate clamping surface, and to prevent the risk of breakage without forcing the stepped portion 32 to become thinner. It can be formed without any.

In addition to the above-mentioned method of loosening the cylinder pressing force of the front movable receiving mold 9 and the back movable receiving mold 22, such sliding in the direction of the stepped portion 32 on the clamping surface of the metal plate 1 can be achieved by, for example, Molds 12, 27 or 13, 28 of at least one of the upper movable mold table 7 and the lower fixed mold table 8 on the side or back side
and the stepped portion 3 while maintaining the sandwiched state of the metal plate 1 with respect to the movable receiving molds 9, 22 and fixed press molds 10, 21 to which these molds are attached.
This can also be achieved by creating a structure that allows it to slide in two directions.

〔effect〕

As described above, in the method for manufacturing a stepped corrugated metal plate according to the present invention, the corrugated metal plate 1 is placed between an upper movable die base 7 having a front movable receiving die 9 and a back fixed die 10, and a front fixed die. 21 and back movable receiving mold 22
Since the upper movable mold base 7 is pressed down by the press device, the pressing force of the upper movable mold base 7 and the pressing force of the movable receiving molds 9 and 22 are the same. By using the absorbent cushion, it is possible to clamp the metal plate necessary for bending and forming the step portion 32 and to pull and slide the metal plate toward the step portion forming portion. In addition, by receiving the downward force of the upper movable mold base 7 in this metal plate sandwiched state, the back movable receiving mold 2 on the lower fixed mold base 8
2 will settle and create a step between the front side clamping molds 12, 27 and the rear side clamping molds 13, 28. Therefore, while holding the secure clamping clamp of the corrugated metal plate 1, This has the effect that the step portion 32 in the direction perpendicular to the step portion 32 can be accurately formed without breakage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a corrugated metal plate in a state before forming a step, FIG. 2 is a side view of a part of the step-forming press device used in the manufacturing method of the present invention, and FIG. 3 is a step-forming press. FIG. 4 is a partially cutaway front view of the stepped press mold, and FIG.
The figure is a partial sectional view of a mold section showing the step formation process sequence, and FIG. 6 is a perspective view of a stepped corrugated metal plate obtained by the manufacturing method of the present invention. In the figure, 1... Corrugated metal plate, 2... Pressing device, 3... Stepping press, 4... Intermittent feeding mechanism,
5... Pressure part, 6... Base, 7... Upper movable mold base, 8... Lower fixed mold base, 9... Front movable receiving mold,
10... Back fixed press die, 11, 23... Plate, 12, 13, 27, 28... Mold, 14, 2
5...Hydraulic cylinder, 19, 20...Guide pole, 21...Front fixed press mold, 22...Back movable receiving mold, 30, 31...Tapered surface, 32...Step part.

Claims (1)

[Claims] 1 A processing method for providing a corrugated metal plate with step portions at regular intervals perpendicular to the direction of each wave, the corrugated metal plate being placed on the lower surface of a press machine via an intermittent feeding mechanism, A stepped upper movable mold base equipped with a front movable mold and a rear fixed mold having a corrugated surface of the same shape as the corrugated metal plate, and a lower fixed mold base equipped with a front fixed mold and a rear movable mold each also having a corrugated surface. After supplying the metal plate between the mold table and the mold table, the upper movable mold table is lowered by the press device, and the metal plate is sandwiched between the front and back molds of the upper movable mold table and the front and back molds of the lower fixed mold table. As the upper movable mold base receives a downward force from the press device, the front movable receiving mold and the front fixed pressing mold are moved by the front movable receiving mold receiving a reaction force from the corresponding lower front fixed pressing mold. The clamping state of one end of the metal plate is maintained on the front fixed die while absorbing the rolling force, and on the other hand, the back fixed die and the back movable receiving die are such that the back movable receiving die is able to absorb the pressure from the corresponding upper back fixed die. While absorbing the rolling force and maintaining the sandwiched state of the other end of the metal plate, the back fixed press mold is lowered to a predetermined position, and the front fixed press mold of the lower fixed mold base and the back fixed press mold of the upper movable mold base are connected. A method for manufacturing a stepped corrugated metal plate, characterized in that a stepped portion is formed in the length direction of the metal plate by a stepped portion that occurs at a boundary.