JPH0216810Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a bending device for moldings.

BACKGROUND ART Conventionally, when manufacturing various moldings M having a predetermined cross-sectional shape and axially bent (see Fig. 1), a band-shaped metal strip M'' wound into a coil is used. It is continuously fed out from an uncoiler 1, fed into a roll forming machine 2, and bent into a molding material M' having a predetermined cross-sectional shape.The molding material M' is then cut to a fixed size by a cutting machine 3. (See Figure 2). After that, the molding material M' cut to size in a separate process from the previous process is individually cut using a stretch bender (third
(see figure) is used to perform axial bending. In this stretch bender, both left and right ends of the molding material M' are held between chucks 4 and 5.
The chucks 4 and 5 are moved by drive cylinders 6a, 6b, 6c, 7a, 7b, and 7c that support the chucks 4 and 5 from multiple directions, and the molding material is
The axial line of M' is bent by pressing against the bending die 8 while pulling the axial line of M'.

However, in the manufacturing process of these moldings,
The process of bending the metal strip material M'' into a predetermined cross-sectional shape and the process of axially bending the molding material M' are performed in separate processes, so that the molding material after being cut to size is The workability is extremely poor due to the trouble of storing or transporting the molding material to the next process and the trouble of individually hanging the molding material on the stretch bender.Moreover, the stretch bender has to hold the left and right ends of the molding material with chucks. Therefore, there is a disadvantage that there is a large amount of waste to be removed by cutting off the chuck.

DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a bending device for moldings that can perform efficient work and reduce scrap allowance.

That is, in the bending device for moldings according to the present invention, the axial bending process of the molding material is continuously arranged following the cross-sectional bending process of the metal strip material, and the bending process is A bending device that presses the axial portion of the molding material is configured so that only the tip side can be held and pressed against the bending die.

The following will be explained with reference to FIGS. 4 to 6.

This bending device is equipped with a roll forming machine 11 that bends a band-shaped metal strip material M'' continuously fed out from an uncoiler 10 into a predetermined cross-sectional shape. An axial bending device 13 for pressing the molding material M' against the bending die 12 is disposed in the direction in which the material M' is sent out (see FIGS. 4a and 4b).
The bending die 12 has a curved surface 14 that is gradually curved upward, horizontally, and diagonally toward the feeding direction of the molding material M'.
molding material on the curved surface 14.
By pressing the axis of M', the axis can be bent. The bending device 13 also includes a chuck 15 that clamps only the tip side of the molding material M', and drive cylinders 16 and 1 that move the chuck 15 horizontally, vertically, and diagonally.
7 and 18. A cutting device 19 is arranged between the bending device 13 and the roll forming machine. This cutting device 19 has a punch blade 2 for cutting the axis of the molding material M'.
0, and the punch blade 20 is connected to the drive cylinder 21.
It is configured so that it can be moved up and down. Further, this cutting device 19 is arranged at a position where it can cut the molding material M' which has been axially bent by the bending device 13 according to the length of the product. Immediately after the roll forming machine 11, a core bar 22 may be placed on the feeding path, which is inserted into the molding material M' as it is fed out, and a drawer 23 is provided which pulls out the molding material from inside the molding after its use. can be placed. The core bar 22 can be made of urethane resin or the like into a long, flexible piece, and its cross-sectional shape is formed by molding material bent by the roll forming machine 11.
It is formed to approximately correspond to the inner shape of M′. In addition, since this core bar 22 fits inward and moves forward as the molding material M' is fed from the roll forming machine 11, in order to make it lockable by the drawer 23, the rear end side A stopper 24 is attached to the stopper 24 (see FIGS. 5a and 5b).
The core metal drawer 23 has a hook plate 26 that is movably supported by a guide bar 25 and is configured to be moved back and forth by a drive cylinder 27.

In the bending device configured as described above, when the molding material M' having a predetermined cross-sectional shape is sent out from the roll forming machine 11, when the core bar 22 is to be placed, the core bar 22 is moved along with the feeding of the molding material. molding material while fitting inside
It moves forward with the feed of M', and comes to be located over almost the entire axial length that requires bending (see Fig. 6a). At this time, please set the hook plate 2 in advance.
6 is moved forward to a predetermined position by the operation of the drive cylinder 27, and waits until the axial bending is completed. When the molding material M' advances and enters the curved surface 14 of the bending die 12, the tip side is clamped by the chuck 15 of the axial bending device 13. This check 15
As soon as the tip is clamped, the horizontal cylinder 1
6 operates to tension the molding material M', and along with this the vertical and diagonal drive cylinders 17, 18 operate to press the axis of the molding material M' against the bending die 13. At this time, if the cross-sectional shape of the molding material M' is complex, since it is supported from the inside by a core metal, it is possible to accurately bend the curvature without deforming the shape.
Further, the rear part of the molding material M' which is pulled by the chuck 15 is preferably supported by pressing the presser plate 28 by a presser device 30 which is moved up and down by a drive cylinder 29.

When the axis bending process is completed in this way, the drive cylinder 27 moves backward in its stroke after the holding plate 28 rises and retreats, so that the hook plate 26
Hook the stopper 24 and pull out the core bar 22 from the axially bent molding material M'. At that time, since the core bar 22 is highly flexible, it can be easily removed, and the holder 31 can be lowered from above the bending mold 12 to hold the molding material M' from the side (the (See Figure 6b). Thereafter, by operating the cutting device 19 to cut the molding material M' to a fixed length (see FIG. 6c), moldings of a fixed length bent at a desired curvature can be manufactured.

In addition, in this bending device, roll forming machine 1
Since the rear axis bending work for cross-sectional bending of the metal strip M'' is quickly completed, even if the tip side is held by the chuck 15 of the axis bending device 13, the roll forming machine 11 The molding material M' sent out from the molding material M' will not cause any problems.

Effects of the Invention As described above, according to the bending device for moldings according to the present invention, cross-sectional bending in the roll forming machine and axial bending in the axial bending device can be performed continuously, and cutting to a fixed size can also be performed. This can be done in the same process, making it possible to manufacture moldings with extremely high efficiency.Also, since the axial bending process can be performed by holding only the leading end of the molding material, the scrap allowance can be reduced. can.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an example of moldings, Figures 2 and 3 are explanatory diagrams showing the bending process of moldings according to the conventional example, and Figures 4a and b are moldings according to the present invention. FIGS. 5a and 5b are explanatory diagrams of the core bar installed in the bending apparatus, and FIGS. 6a, b, and c are explanatory diagrams of the operation of the bending apparatus according to the present invention. M″: Metal strip material, M′: Molding material, 11: Roll forming machine, 12: Bending mold, 1
3: Axis bending device, 19: Sized cutting device, 30:
Presser foot device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Molding material sent out from a roll forming machine behind a roll forming machine that bends continuously fed metal strip material into a predetermined cross-sectional shape A molding characterized in that an axial bending device is disposed that clamps the axial portion of the tip on the tip side and presses it against a bending die, and a cutting device that cuts the axially bent molding material to a specified size is disposed between them. type of bending equipment. (2) The bending device according to claim 1, which is a registered utility model, characterized in that a presser device for pressing and supporting the molding material is disposed on the front side of the cutting device.