JPH0218645B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a tapered groove member having four bending points, that is, a tapered groove member having a lip on the inside of the opening edge, and a flange on the outside of the opening edge. The present invention relates to a method of manufacturing a tapered channel having the following.

(Prior art and its problems) Conventionally, in order to manufacture a tapered channel member having a lip or flange at the opening edge as described above, a constant taper is required in the longitudinal direction of both left and right edges as shown in FIG. 12a, for example. The metal cut plate material 2 marked with 1 is cut into 1 parts using a V-type press as shown in FIGS. 12b to 12e.
Each corner was bent and formed as appropriate. For this reason,
The metal cut plate material 2 must be positioned each time before it is bent and formed, which is time-consuming, and since it is bent and formed four times, productivity is extremely poor. Further, since it is difficult to accurately position the metal cut plate material 2 before bending and forming it each time, the product dimensions vary widely and the accuracy is poor.

(Purpose of the Invention) The present invention was made to solve this problem, and it is possible to create a tapered grooved material having lips and flanges with high dimensional accuracy by bending a metal cut plate material by pressing twice. The purpose is to provide a method that can be manufactured efficiently.

(Structure of the Invention) The method for manufacturing a tapered channel member having lips and flanges according to the present invention includes cutting a metal cut plate material having a constant or variable taper in the longitudinal direction of both left and right edges.
The mold is fed between the upper mold, which is divided into 3 blocks, and the lower mold, which is divided into 4 blocks, and set in place.Then, the upper mold is lowered, and the side molds on its left and right and the side molds on the left and right of the lower mold are placed. The left and right sides of the metal cut plate material are bent and formed in the longitudinal direction to form the required taper angle, and then the upper mold is raised and the left and right side molds are moved outward, and then the upper mold is lowered. The present invention is characterized in that two blocks of center molds, a center mold and a lower mold, are used to bend and form the left and right sides of the central portion of the metal cut plate material so as to form a required taper angle in the longitudinal direction.

(Example) An example of the method for manufacturing a tapered channel member having a lip and flange according to the present invention will be described with reference to the drawings. First, the apparatus for carrying out this method will be explained with reference to FIGS. 1 and 2. Reference numeral 10 represents an upper mold, and 11 represents a lower mold. The upper mold 10 is divided into three blocks in the width direction and consists of a center mold 12 and left and right side molds 13. The center mold 12 is removably fixed to a holder 15 attached to the press head 14.
The lower end central portion 12a is curved upward in an arc shape, and the left and right side portions 12b of the lower end face press against the molded member. The left and right side molds 13 are supported so as to be slidable outward along guides 16 attached to the press head 14, respectively.
It is designed to be moved forward and backward by a hydraulic cylinder 17 fixed to. Reference numeral 18 is a positioning stopper of the side mold 13 provided on both the left and right sides of the center mold 12, so that the side mold 13 can be attached to and removed from the holder 15. The lower mold 11 is divided into 4 blocks in the width direction, including a 2-block center mold 20 and left and right side molds 2.
Consists of 1. The two-block center mold 20 is removably fixed to a guide 23 on the upper surface of the press head 22, and a molding recess 24 is provided in the center of the upper surface. The left and right side molds 21 are made slidable outward by guides 23, and have a height higher than that of the center mold 20, and are provided with molding recesses 25 at the same height as the center mold 20 on the inner side of the upper surface, respectively. It is designed to be moved forward and backward by a hydraulic cylinder 26 fixed on 22. 27 is 2
The distance piece 28 is interposed between the center molds 20 of two blocks.
0 and the left and right side molds 21, which are detachable.

The lower end of the center mold 12 of the upper mold 10, the positioning stopper 18 of the side mold 13, the distance piece 27 interposed between the two blocks of center molds 20 of the lower mold 11, and the left and right center molds 20 of the two blocks Each width dimension of the distance piece 28 interposed between the side mold 21 is gradually increased from one end to the other end in the longitudinal direction, and is tapered symmetrically with respect to the center line of the device.

Next, an example of manufacturing a tapered channel member having a lip having a substantially pentagonal cross section using the apparatus configured as described above will be described with reference to FIGS. 3 to 6. First, as shown in FIG. 3b, a metal cut plate material 2 with a predetermined taper 1 in the longitudinal direction of both left and right edges is fed between the upper die 10 and the lower die 11 as shown in FIG. 3a,
It is set at a predetermined position on the left and right side molds 21 of the lower mold 11. Next, as shown in FIG. 4A, the upper mold 10 is lowered together with the press head 14, and the metal cut plate material 2 is press-fitted into the molding recesses 25 of the left and right side molds 21 of the lower mold 11 using the left and right side molds 13. The left and right sides of the metal cut plate material 2 are formed into a predetermined taper angle in the longitudinal direction as shown in FIG. 4b, and are bent upward at a predetermined angle. Next, as shown in FIG. 5, the upper mold 10 is raised together with the press head 14, and the left and right side molds 13 are further moved outward by sliding along the guides 16 by the hydraulic cylinders 17. After that, the press head 1 is opened as shown in Fig. 6a.
4, the upper mold 10 is lowered again, and the metal cut plate material 2 is press-fitted into the molding recesses 24 of the two blocks of center molds 20 of the lower mold 11 using the center mold 12.
The left and right sides of the central part of the metal cut plate material 2 are formed into a predetermined taper angle in the longitudinal direction as shown in FIG. A channel member 31 was obtained.

Next, an example of manufacturing a tapered channel member having a mortar-shaped cross section with flanges at the upper ends of both sides is shown in FIGS. 7 to 10.
This will be explained using figures. In this case, the left and right side molds of the lower mold 11 are made at the same height as the center mold 20, as shown in FIG.
5' is replaced with a side mold 21' provided on the outside at the same depth as the molding recess 24 of the center mold 20.

First, as shown in FIG. 7b, a metal cut plate material 2 with a predetermined taper in the longitudinal direction of both left and right edges is fed between the upper mold 10 and the lower mold 11 as shown in FIG. 7a, and the lower mold 11 Set it in the specified position above. Next, as shown in FIG. 8a, the upper mold 10 is lowered, and the right and left sides of the metal cut plate material 2 are cut into the molding recesses 21' of the left and right side molds 21' of the lower mold 11 using the left and right side molds 13.
5' to form a predetermined taper angle in the longitudinal direction and bend downward at a predetermined angle as shown in FIG. 8b. Next, as shown in FIG.
is raised, and further the left and right side molds 13 are slid along the guides 16 by the hydraulic cylinders 17 and moved outward. Thereafter, as shown in FIG. 10a, the upper mold 10 is lowered again, and the metal cut plate material 2 is press-fitted into the molding recesses 24 of the two blocks of center molds 20 of the lower mold 11 using the center mold 12 of the upper mold 10. As shown in FIG. 10b, the left and right sides of the central part of the cut plate material 2 are formed into a predetermined taper angle in the longitudinal direction, and are bent upward at a predetermined angle to form a tapered groove material 33 having a trapezoidal cross section and a flange 32. A so-called tapered hat profile was obtained.

In addition, in addition to the tapered groove members 31 and 33 manufactured in each of the above embodiments, the manufacturing method of the present invention
As shown in d to d, a tapered channel member 35 having a lip 34 having a rectangular cross section, a tapered channel member 37 having a rectangular cross section having a flange 36, and a rectangular cross section having a lip 38 in which the taper is in the opposite direction at the middle of the longitudinal direction. It is possible to manufacture a tapered channel member 39, a tapered channel member 41 having a rectangular cross section having a flange 40 in which the taper is reversed in the middle in the longitudinal direction, and the like.
Of course, when manufacturing these tapered channel members,
The lower mold 11 of the device shown in FIGS. 1 and 2 is replaced with the required one, and the upper mold 10 is also replaced if necessary. Furthermore, the positioning stoppers 18 of the left and right side molds 13 of the upper mold 10 and the positioning stops of the lower mold 11 are replaced. stance piece 2
Replace 7 and 28.

(Effects of the Invention) As can be seen from the above description, according to the manufacturing method of the present invention, various tapered groove shapes with four tapered corners can be produced by bending a metal cut plate material by pressing twice. can be manufactured efficiently, resulting in extremely high productivity. In addition, metal cutting plates can be continuously bent and formed just by positioning them once.
Variations in product dimensions due to positioning errors are reduced, and various tapered grooves having highly accurate lips and flanges can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 show an apparatus for carrying out the method of manufacturing a tapered channel member having a lip and flange according to the present invention. Figure 1 is a longitudinal sectional view of one end, and Figure 2 is Vertical sectional views of the other end, Figures 3 to 6
The figures show the steps of an embodiment of the manufacturing method of the present invention, in which a is a schematic view of the device in operation, b is a perspective view showing the state of the material during operation of the device, and FIGS. 7 to 10. 1 shows the steps of another embodiment of the manufacturing method of the present invention, a is a schematic diagram of the device in operation, b
11 is a perspective view showing the state of the material during operation of the device; FIGS. 11a to 11d are perspective views showing other examples of tapered channel members having lips and flanges manufactured by the manufacturing method of the present invention; FIG. Figures a to e are perspective views showing the manufacturing process of a conventional tapered channel with a lip. 1...Taper, 2...Metal cutting plate material, 10...Upper die, 1
1...Lower mold, 12...Upper mold center mold, 13...Upper mold side mold, 20...Lower mold center mold, 21,2
1'... Lower mold side mold.

Claims (1)

[Claims] 1. A cut metal plate with a constant or variable taper in the longitudinal direction of both left and right edges is fed between an upper mold divided into 3 blocks and a lower mold divided into 4 blocks, and set in a predetermined position. Then, the upper die is lowered and the left and right side dies of the upper die and the left and right side dies of the lower die are used to bend and form the left and right sides of the metal cut plate material to the required taper angle in the longitudinal direction.
Next, the upper mold is raised, the left and right side molds are moved outward, and then the upper mold is lowered, and the two blocks of center molds, the center mold and the lower mold, cut both left and right sides of the central part of the metal cutting plate material. A method for manufacturing a tapered channel material having a lip and flange, which is formed by bending the material to a desired taper angle in the longitudinal direction.