JPS6135309Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a press consisting of a lower die attached to the bed and an upper die attached to the lower surface of the slide, and its purpose is to create a press that does not require air pressure or hydraulic pressure. However, it is an object of the present invention to provide a dictation device which can maintain a constant dictation force after the start of drawing, has a simple structure and can be provided at low cost, and is especially suitable for deep drawing.

Hereinafter, one embodiment of the present invention will be described based on the drawings. In Figure 1, 1 is the bed, and its upper surface 1
A lower die 3 is attached to a via a bolster plate 2. 4 is a slide, and an upper mold 5 corresponding to the lower mold 3 is attached to the lower surface 4a of the slide. A blank holder 6 holds the blank 7 between it and the upper mold 5, and is configured to be movable up and down around the lower mold 3. A space 8 is formed in the bed 1 below the bolster plate 2, and a presser plate 9 is provided in this space 8. This presser plate 9 is connected to the blank presser 6 via a plurality of cushion pins 10.
A through hole 11 is formed in the bolster plate 2 to allow the cushion pin 10 to move up and down. A case-shaped fixing member 12 is attached to the lower surface of the bed 1 by a fixing member 13, and an elevating member 14 is provided within the fixing member 12 so as to be movable up and down. This elevating member 14 and the presser plate 9
A first elastic body 15 made of urethane, rubber, etc. is provided between the two. Further, a second elastic body (such as a spring) 16 is provided between the elevating member 14 and the fixed member 12 to urge the elevating member 14 upwardly. 1
Perform by b. Note that here, the elastic force of the second elastic body 16 is set to be larger than the elastic force of the first elastic body 15. A plurality of rods 17 are erected from the upper surface of the elevating member 14, and these rods 1
A through hole 18 is formed in the bed 1 to allow the bed 7 to move up and down. When the blank material 7 is clamped, a certain gap A is formed between the upper surface 17a of the rod 17 and the lower surface 4a of the slide 4, and this gap A is formed between the lower surface of the blank material 7 and the lower mold 3 at this point. It is set to be equal to the gap a created between it and the top surface. Further, the first elastic body 15 is configured to absorb elasticity at least in an amount equal to the gap A, a.

As shown in FIG. 1, the blank presser 6 and the upper die 5
When the blank material 7 is sandwiched between the two, the gaps A,
a are occurring equally. When the slide 4 is lowered in this state, the lowering force is transmitted to the presser plate 9 via the upper die 5, blank material 7, blank presser 6, and cushion pin 10, and as shown in FIG.
The elastic body 15 is compressed against its elastic force. Then, connect the lower surface 4a of the slide 4 to the upper surface 1 of the rod 17.
When it comes into contact with 7a and eliminates the gap A,
The blank material 7 is brought into contact with the lower die 3 to eliminate the gap a. By eliminating the gaps A and a, the aperture starting point B is reached as shown in FIG. 4, and up to this point the cushion load increases. When the slide 4 is further lowered, the blank material 7 is formed between the lower die 3 and the upper die 5 as shown in FIG. At this time, the elevating member 14 is lowered via the rod 17 and against the elastic force of the second elastic body 16, so that the blank presser 6 is lowered with the cushion load being constant P. The descending amount D of the elevating member 14 is equal to the forming descending amount d.

As described above, according to the present invention, since the first elastic body and the second elastic body are used, there is no need for air pressure or hydraulic pressure, and the downward force of the slide is applied to the elevating member via the rod from the start of throttling. As a result, the dictation force by the first elastic body can be kept constant after the start of squeezing. Furthermore, since both elastic bodies are used, the structure can be simplified and it can be provided at low cost. Furthermore, it is possible to provide a product particularly suitable for deep drawing.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS.
Each figure is a longitudinal sectional front view showing the operating state, and FIG. 4 is a graph diagram. 1...Bed, 1a...Top surface, 2...Bolster plate, 3...Lower mold, 4...Slide, 4a...
...Lower surface, 5...Upper die, 6...Blank presser, 7...
... Blank material, 9 ... Pressing plate, 10 ... Cushion pin, 12 ... Fixing member, 14 ... Lifting member,
15...first elastic body, 16...second elastic body, 17
...Rod, 17a...Top surface, A...Gap, a...
…gap.

Claims (1)

[Scope of utility model registration request] In a press consisting of a lower die attached to a bed and an upper die attached to the lower surface of a slide, a blank holder for holding a blank material between the upper die and the upper die is configured to be movable up and down around the lower die. A first elastic body is provided between a presser plate integrated below the presser foot and an elevating member disposed below the bed, and a first elastic body is provided between the elevating member and a fixing member disposed below the elevating member. 1. A dicing device for a press, characterized in that two elastic bodies are provided, and a rod facing the lower surface of the slide is erected from the elevating member.