JPS59159227A - Drawing device - Google Patents

Abstract

PURPOSE:To obtain a device which reduces a bead effect and prevents automatically a breakdown of forming goods by opening a bead for controlling a material flow of an inserted and pressed part, at the final time of working, in case of a punch working of a material detained by a wrinkle holding plate. CONSTITUTION:A material 3 inserted and pressed by a die 1 and a wrinkle holding plate 2 detains leading-in by a punch P, by a bead body 4. At the final stage of working by the punch P, a cam 11 moves a cam 8 against a spring 10, and a die of the bead body 4 goes into a groove part 8a, by which a bead lower pressure is reduced, and a leading-in breakdown of the material is prevented automatically.

Description

[Detailed description of the invention] (Technical field) The present invention requires 151.1 seconds for the drawing device 6].

(Background Art) In drawing processing, in order to prevent wrinkles from forming in the molded product, there is often a bead that controls the material's slippage. FIG. 3 shows an example of a conventionally used bead. This conventional bead main body 4 is fixed to the wrinkle holding plate 2 as a part of the mold, and is configured to partially suppress the material flow during the entire drawing stroke. When forming under severe conditions or when the material 3 is weak such as aluminum, it may be necessary to reduce the bead effect in the middle of the forming stroke, or conversely to strengthen the effect in the middle. 13, the bead body 4 is identified to the wrinkle holding plate 2, so the process is divided into 2 or 3, or the entrance and exit of the bead is controlled by a special hydraulic device, etc., which increases costs. It was becoming a problem.

(Objective of the Invention) The present invention has been proposed in view of the above points, and its object is to provide a simple method that can prevent wrinkles and breakage by controlling the bead effect in drawing according to the forming stroke. The purpose of the present invention is to provide a drawing device having the following configuration.

(Disclosure of invention) Hereinafter, the present invention will be explained along with the drawings.

FIG. 1 shows a first embodiment of the present invention, and in the figure, P is ]? 1 liter, IVi Gui, 2 ke Gui 10
-) Wrinkle presser 7 temporary, 3 is supported by the Gui face between Gui 1 and [7 wrinkle presser 2.
, 4 is a straight hole Dj provided in the wrinkle holding plate 2.
A material 3 is provided inside the hole 2a, and the tip can protrude from the lower surface of the presser plate 2.
5 is an elastic rubber provided on the upper end of the bead body 4, and 6 is a rotatable rotating body provided on the comb through a support 7, which can be suppressed by a slider 8. In other words, the wrinkle presser temporary 2 (
Then, the hole 2b that extends in the substantially horizontal direction and intersects with the hole 2a is!
A rod-shaped slider 8 whose outer end is connected to a cylinder 9 is provided in the hole 2b so as to be slidable left and right as shown by the arrow. A cam 8a in the form of a d-chee and 4' is formed in a part of the 1: surface of the slider 8 with a small cut.

On the other hand, the column 9 is connected to the bead body 4 and integrated with the bead body 4.
'1. Rotating body 6? ``Inside the i hole 2b-\It is formed so that it can protrude, and the hull shape is ``''-Que and Sura fda 8
The sliding shape of the cam 8a is gradually pushed into the groove Jt downward, or moved upward along the cutting surface to protrude into the cam 8a.

Next, the operation will be explained.

The bead main body 4 is extruded into a stiff face by the rubber 5. There is a cam slide above the bead body 4,
When the slider 8 is slid to the right side in the figure by the cylinder 9, the bead body 4 follows the notched cam 8a.
The amount of extrusion can be changed to change its effectiveness. Note that this example is an example in which a cylinder 9 is provided in the mold to control the entire flow of molding, which has the advantage that no special piping or mold structure is required compared to the conventional method using hydraulic pressure. be.

FIG. 2 shows another embodiment of the invention. In this embodiment, a groove 2b' extending substantially horizontally is formed in the northern part of the wrinkle holding plate 2, and a slider 8 having a cam 8a' in this groove 2b'.
is provided so as to be slidable in the horizontal force direction. And groove 2
A coiled spring 10 that presses the slider 8 is compressed between the outer end of the slider 8 in b' and the wrinkle presser plate 2, and is inclined toward the inner end of the slider 8 in the QIA and R parts. A punch boulder 12 that supports the punch P is provided with a cam 11 having a chip surface that corresponds to the chip surface. Other borrowed knowledge are the same as those in Figure 2.

In this embodiment, the punch (or punch holder)
It forms a cam slider in combination with the t? As the pin tilder 12 moves downward, the contact f between the tapered surface of the cam 11 and the chiming surface of the slider 8 changes. moves to the right and changes the extrusion state of the bead body 4 to 11.
L t: ↑The structure of ζ is eight.

Although the controllable stroke may be shorter than that of the embodiment of FIG. 2, it has the advantage of a simpler structure. 7. In particular, since the molded product breaks near the end of molding 1=J, it is suitable for a lifting platform where it is desired to reduce the effect of the bead only near the end.

(Effects of the Invention) According to the following 1+1 present invention G, the material can be suppressed in accordance with the movement of the slider provided on the wrinkle presser plate and capable of sliding. Since the bead main body is provided and the bead effect can be controlled according to the forming stroke, (a) the bead control force Uj can be easily realized.

(Toward) This eliminates the need for dividing the process or special equipment, and prevents cost l-UP.

There are other effects.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the present invention, FIG. 2 shows another embodiment of the present invention, and FIG. 3 shows a conventional example. P・Hot'' pinch, 1... Gui, 2... Wrinkle press plate, 3
...Material, 4...Bead body, 5-.)9mm, 6.
・Rotating body, 8・Slider, 8a, 8a'・-Cam, 9
・・・Cylinder, 10・Spring, 1 Tokam, 12・Pinch holder.

Claims (1)

[Claims] 1 set of material supported by gouers and wrinkle retaining plates/
A bead body that can press the material according to the movement of a slidable slider provided on the wrinkle holding plate is attached to the wrinkle holding plate in the drawing device that processes the material at the machine. A drawing processing device fP2- is characterized by being provided.