JPS59232629A - Method and device for forming under liquid pressure - Google Patents

Abstract

PURPOSE:To form simultaneously two formed articles and to improve productivity by exerting simultaneously liquid pressure on the blank materials disposed on both sides of a blank holding plate and forming the materials. CONSTITUTION:Crease pressing surfaces are formed on both sides of a blank holding plate 6 and blank materials 16 are disposed thereon. A pair of dies 2, 3 are disposed on both sides thereof in such a way that the respective die surfaces 2a, 3a face each other. One of the dies is fixed and the other is made drivable. The plate 6 is supported via a spring 26 by the die 1 on the stationary side. The above-described materials 16 are pressed to both sides of the plate 6 and the dies are clamped. A liquid is supplied under pressure through a water feed path 20 into the hermetic parts 18 formed by the plates 6 and the materials 16 to form the materials 16. Two formed articles are simultaneously formed by the above- mentioned method, by which productivity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION This light relates to a hydroforming method and apparatus for bulging a material using hydraulic pressure.

Hydroforming has traditionally been a method of molding materials using hydraulic pressure to produce products of various shapes, and has been widely applied in various fields because it has the advantage of being easy to mold products with complex shapes. There is..

However, the hydroforming equipment used to perform this hydroforming is not cheap because it uses high-hardness materials for its main parts, and it is difficult to install multiple machines to meet the demand for high-mix, low-volume production. , there was a problem in that it was difficult due to the above constraints on cost 1.

In addition, forming materials using this hydroforming method involves a series of steps such as setting the material and applying hydraulic pressure. Unit required for V! There was a need to increase the number of products produced per hour.

Furthermore, the pressing force and hydraulic pressure applied when forming the material need to be adjusted according to the thickness of the material and the depth of squeezing. A molded product that has equal pairs of parts can be created by connecting such pairs even though the material itself has similar temporary and warp depths, and the required pressing force and hydraulic pressure are the same. When forming a molded product into a low-cut shape, it is necessary to set a wrinkle presser individually each time, which has the disadvantage of duplicating labor.

The present invention has been made in view of the above-mentioned conventional circumstances, and contributes to improving productivity and reducing costs of hydroforming, and provides a hydroforming method and method that is particularly advantageous for forming paired molded products. The purpose is to provide such equipment.

That is, in the hydroforming method that is the first invention of this application, materials are arranged on both sides of a blank bold plate, and a pair of dies are placed on the blank holding plate in a position where the mold surfaces face each of the cords. Press on both sides to tighten the mold,
Thereafter, each of the above-mentioned materials is simultaneously hydraulically formed by supplying fluid under pressure to the sealed portion formed by the blank bold plate and each material. In the hydroforming apparatus according to the second invention, wrinkle pressing surfaces are formed on both sides of a blank bold plate, and each mold surface is formed so as to face each side surface on which the wrinkle pressing surfaces are formed. A pair of dies is arranged, one of the pair of dies is fixed and the other can be driven in a direction perpendicular to the mold surface, and the above-mentioned blank bold plate is made through elastic vibration by the fixed-vertical die. In addition to supporting the die, the blank holding plate is provided with an injection channel that opens on the mouth surface opposite to the die mold surface.

An embodiment of a hydraulic molding apparatus, which is the invention of Section 4'J2 of this application, will be described below with reference to FIG.

In FIG. 1, a die 2 is fixedly installed on a fixed wall 1.
A pair of nine dies 3 are attached to a movable plate 4, and each of the dies 2 and 3 has a mold surface 2a and a mold surface 3a of different shapes.

A guide post 5 is fixedly installed in the lower part of the die 2, and the other end of the guide post 5 passes through a single hole 7 provided in the lower part of the blank hold plate 6 and passes through the lower part of the die 3. (φ) can be inserted into the sliding hole 8 provided in the.

Wrinkle pressing surfaces 6a to 6d are formed on the upper and lower sides of both sides of the blank holding plate 6, and as described above, cera;
In the state 1: the die 2 and the die 3 are oriented such that their respective mold surfaces 2a and 3a face the inversions on which the wrinkle pressing surfaces 6a to 6d of the blank hold plays 1 to 6 are formed.

Dice 3 is installed! =The movable temporary 4 has a cylinder 9
is mounted C, and this shilling 9 (2) allows the die 3 to move in the direction B perpendicular to the mold surface 3a. Seal 1 on -6 and Seal 10a
0b, and the die 2 fixed to the fixed wall 1 by the pressing force quantitatively connects the seal 10c and the seal 1.
It is pressed against the blank hold play 1-6 via 0d. Also, the 4-lower Bi of dice 2 and dice 3
The retaining ring 12 is connected to the elastic body 11a through -116.
8 to 12d are provided, and these retaining rings 12a to 12
d, the blank holding plate 6 is pressed from its r'i side via the seals i3a to 13d'e.

As mentioned above, due to the pressing force of the cylinder 9, the blank hold play 1-6 (J, from both sides of the die 2 and J
:The mold is clamped by die 3.

Blank bold plate 6 up? 1", a pair of guide shoes 1-14 are attached to both 1, and the lower end I of the material guide shoe 1 is
ff! Directly below the opening, a pair of tolerance positioning gauges 15 are provided that extend toward the blank hoe and the JL todo plate image side, and a pair of materials 16 inserted from the material guide post 1/l are placed below ζ;:: '3 Q position [decision gauge 1
5 and placed on both sides of 1-6. With the material 16 arranged in this way, if the dice 2 and 3 are set as described above, the seals 1oa to 10d and 13a to 13d
and other seals 17a to 17d to form a sealed portion 18 between the blank bold plate 6 and the sixth base material.

Further, an air vent passage 19 is provided in the upper part of the blank bold plate 6, and the mold surface 2a of the die 2 and the die 3 is provided in the lower part of the blank hold plate 1-6.
A water injection channel 2o is provided which opens on the side surface facing the mold surface 3a, and water is poured into the sealed portion 18 from the tank 21 via the water injection channel ff1820 by the high pressure pump 22.

In addition, in the die 2 and the die 3, a product scraper 23 is housed in a hole formed inside the mold surface 2a and the mold surface 3a. Further, one end of a spring retainer 24 is fitted at the upper end of the die 2, and a stopper 25 is formed at the other end passing through the upper end hole of the blank holding plate 6. Furthermore, a spring 26 is suspended between the end of the spring retainer 24 on the die 2 side and the blank bold play h 6 f512 (here, a spring 26 as an elastic force that supports the blank bold plays 1 to 6 by the die 2 is suspended). The blank hold plays 1 and 6 are supported in a floating state through the blank hold plays 1 and 6.

Next, a method for performing sonic pressure molding using the hydraulic molding apparatus of the above embodiment will be explained in detail with reference to Nos. 21 to 71.

First, as shown in FIG.
Then, the valves of the dies 2 and 3 are mutually closed, and in this state, the material 1G is placed on both sides of the material guide shoe +-, 14 to the blank hold play 1 6. Next, as shown in FIG.
is pressed against the blank bold plate 6. The pressing force by the cylinder 9 is determined by taking into consideration the stacking thickness of the material 16, the drawing ratio, the hydraulic pressure that can be applied, etc.
The wrinkle pressing force Dl exerted by the wrinkle pressing surfaces 6a to 6d of No. 6 is set to be the minimum to the necessary extent. During this setting, a force is always applied between the die 2 and the blank bold plate 6 by the spring 2G in the opposite direction to the force applied by the cylinder 9. Good j-j naeru.

Next, as shown in FIG.
Bulging of the material 16 is performed by applying hydraulic pressure in the direction of a and the mold surface 3a.

Next, as shown in FIG.
When the water in the cylinder 8 is drained and the pressing force applied by the cylinder 9 is released as shown in FIG.
Due to the force, the dies 2 and 3 and the blank hold plate 1-6 are separated from each other and demolded.

Finally, as shown in FIG. 7, the forming force is discharged by the product discharge 23, thereby completing the series of one culm. As shown in the figure, according to the present invention, it is possible to simultaneously obtain a product in which two bodies are hydroformed.

As described above, according to this invention, blank hold is possible! Put 0 on both sides of -1-! By applying hydraulic pressure to each bed sheet at the same time and performing hydraulic molding, it is possible to mold 21 molded products at the same time with one molding device, and it is possible to mold 21 molded products at the same time. ) It is possible to reduce the production cost (+lfi). Also, since two molded objects can be molded at the same time, the production per unit time (1) doubles, and the productivity increases. In particular, it is said that the labor can be reduced when manufacturing paired moldings, such as the top and bottom parts of zero-material tanks in automobiles and I-bu. There are advantages.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the hydraulic molding apparatus of the invention of Application 2, which is directly used for carrying out the invention of Application 1, and FIG. 2 is a sectional view of the L! :, After leaving the room for a minute, the cross-section is shown in Figure 3. Figure 3 is shown in Figure 1. Figure, 41st El
Figure 5 is a schematic cross-sectional view showing water being poured into the device shown in Figure 3; After the state shown in FIG. 5, the Baidu device is separated into a cross-sectional diagram, and FIG. It is the second figure. 2... Dice, 2a... Mold surface, 3... Dice, 3a... Mold surface, 6... Blank hold plate, 9... Cylinder, 14... Cable Material guide chute, 15...Material positioning gauge, 18...
Sealed part, 20... Injection channel, 23... Product payment,
24... Spring retainer, 26... Spring. Applicant Toyota Motor Corporation Agent Patent Attorney Yutaka 1) Hisashi Take (1 person) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 6 Figure 7 Melon

Claims (1)

[Claims] (1) Arrange the materials on both sides of the blank hold plate, press a pair of dies against both sides of the blank bold plate at a position where the mold surface faces each material, and clamp the mold. A method for hydroforming, characterized in that each of the materials is simultaneously hydraulically molded by supplying a fluid under pressure to a sealed portion formed by each material. (Form the wrinkled holding surfaces on both sides of the 2-knob blank bold play 1-, and roll the number 1 die so that the mold surface of each non faces the 8 faces on which the wrinkled holding surfaces of the blank hold play 1-1- were formed. , one of the pair of dies is set at li and I, and the other can be driven in a direction perpendicular to the mold surface, and the blank holding plate is supported by the die on the fixed side via the bullet. A hydraulic forming apparatus characterized in that the blank holding plate is provided with an injection channel that opens on the side surface facing the die mold surface.