JP2001058219A - Press die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press die capable of simplifying the manufacturing process of its upper die without causing any reduction in the die strength of the upper die. SOLUTION: In this press die having a lower die 11 and the upper die 12 for executing the press working of a material 20 to be pressed and a cushion ring 13 arranged on the outer peripheral part of the lower die 11, a blank holding and positioning mechanism 2 consisting of a blank holding and positioning member 3 for executing the blank holding and positioning of the member 20 to be pressed and a spring supporting part 4 for supporting this blank holding and positioning member 3 in the state where the member is always energized to the side of the upper die is provided on the upper surface part of the cushion ring 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press die, and more particularly, to a press die for improving a positioning gauge and a wrinkle holder for a material to be pressed.

[0002]

2. Description of the Related Art A schematic configuration of a conventional press die for performing draw forming will be described with reference to FIG. The conventional press die shown in FIG. 5 includes a lower die 51 and an upper die 52 for pressing a material to be pressed such as an iron plate, a cushion ring 53 arranged on an outer peripheral portion of the lower die 51,
For example, the upper die 5 is attached to the upper surface of
And a positioning gauge 54 for positioning the material to be pressed protruding to the two sides.

The upper die 52 is provided with a relief hole 55 into which one end 54a of the positioning gauge 54 can enter.

[0004]

By the way, in the case of the above-mentioned conventional press die, one end 5 of the positioning gauge 54 is provided.
4a protrudes toward the upper mold 52 as described above. Therefore, the one end 54 of the positioning gauge 54 is provided on the upper mold 52 side.
Since it is essential to provide the escape hole 55 into which the “a” can enter, the manufacturing process of the upper mold 52 may be complicated,
There is a problem that the mold strength is lowered.

[0005] The present invention has been made in view of the above circumstances, and can simplify the manufacturing process of the upper mold,
Further, the present invention provides a press die which does not cause a decrease in die strength of the upper die.

[0006]

According to the first aspect of the present invention,
In a press die having a lower die and an upper die for performing a press working of a material to be pressed, and a cushion ring arranged on an outer peripheral portion of the lower die, the upper surface of the cushion ring is synchronized with the vertical movement of the upper die with respect to the lower die. And a wrinkle holding / positioning mechanism that expands and contracts in the vertical direction of the upper die to hold and position the material to be pressed.

[0007] According to the present invention, the wrinkle holding and positioning mechanism provided on the upper surface of the cushion ring expands and contracts in the vertical direction of the upper die in synchronization with the vertical movement of the upper die with respect to the lower die.
Since it is to perform wrinkle pressing and positioning of the material to be pressed, it is possible to position the material to be pressed with the wrinkle pressing and positioning mechanism extended at the rising position of the upper die, and at the descending position of the upper die. That is, at the time of press working of the material to be pressed, wrinkle holding of the material to be pressed can be performed with the wrinkle holding and positioning mechanism contracted.

Accordingly, there is no need to provide a relief hole or the like for a positioning gauge as in the conventional example on the upper mold side, so that the manufacturing process of the upper mold can be simplified, and the strength of the upper mold can be reduced. There is no danger of inviting.

According to a second aspect of the present invention, there is provided a press die having a lower die and an upper die for pressing a material to be pressed, and a cushion ring disposed on an outer peripheral portion of the lower die. A wrinkle holding / positioning mechanism comprising a wrinkle holding / positioning member for pressing and positioning the material to be pressed and a spring supporting portion which constantly supports the wrinkle holding / positioning member toward the upper mold side is provided. It is characterized by having.

According to the present invention, it is possible to position the material to be pressed in a state where the wrinkle pressing and positioning member of the wrinkle pressing and positioning mechanism is extended at the rising position of the upper die, and at the descending position of the upper die. That is, at the time of press working of the material to be pressed, wrinkle holding of the material to be pressed can be performed with the wrinkle holding and positioning member being contracted against the elasticity of the spring support portion.

Therefore, as in the case of the first aspect of the present invention, there is no need to provide a relief hole for a positioning gauge or the like as in the conventional example on the upper die side, so that the manufacturing process of the upper die can be simplified, and In addition, there is no possibility that the strength of the upper mold is reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a press die 1 according to an embodiment of the present invention will be described in detail with reference to FIGS.

A press die 1 according to the embodiment shown in FIG.
The upper die 1 supported by the lower die 11 and the ram 16 on the base 15 for pressing the pressed material 20 such as an iron plate.
2 and a cushion ring 13 arranged so as to surround the outer periphery of the lower mold 11.

The cushion ring 13 is formed in a cylindrical shape as a whole, and projects cushion pins 13a, 13b projecting downward from the lower surface side so as to penetrate into the base 15 through the side wall of the lower mold 11. Let me. Further, a slide mechanism 14 is provided between the inner peripheral portion of the cushion ring 13 and the outer peripheral portion of the lower mold 11.

As a result, when the upper mold 12 is lowered, the cushion ring 13 is pushed by the upper mold 12 and descends in the direction of arrow a shown in FIG.

A wrinkle holding and positioning mechanism 2 for wrinkle holding and positioning of the material to be pressed 20 is provided on the upper surface of the cushion ring 13 and on the outer peripheral portion.

The wrinkle holding and positioning mechanism 2 comprises a wrinkle holding and positioning member 3 for holding and positioning the pressed material 20 disposed on the upper surface of the cushion ring 13 and a wrinkle holding and positioning member 3. A spring supporting portion 4 is always provided on the upper mold 12 side, that is, in a state of being urged in the direction of arrow b shown in FIG.

As shown in an enlarged manner in FIG. 4, the spring support portion 4 has a concave portion 13 provided in the cushion ring 13.
The lower end is fixedly disposed in the upper portion c, and the upper end is fitted to the lower part of the wrinkle holding and positioning member 3.

Next, the pressing operation of the pressed material 20 by the press die 1 of the present embodiment will be described mainly with reference to FIGS. explain.

In a state where the upper die 12 is elevated above the lower die 11 as shown in FIG. 1 before the press working, the wrinkle holding and positioning member 3 is moved by the elastic force of the spring support 4. , B, and protrudes upward from the upper surface of the cushion ring 13. Accordingly, the pressed material 20 can be positioned by the wrinkle holding and positioning member 3 in this state. This state is shown in an enlarged manner in the upper section of FIG.

Next, when the upper mold 12 is lowered, the press surface of the upper mold 12 comes into contact with the material to be pressed 20 as shown in FIG. 2, and the material to be pressed 20 is sandwiched between the upper mold 12 and the lower mold 11. State. At this time, the outer peripheral portion of the press surface of the upper die 12 also comes into contact with the upper surface of the wrinkle holding and positioning member 3, and the pressing of the wrinkle holding and positioning member 3 is started.

When the upper mold 12 is further lowered,
That is, at the time of performing the press working of the material to be pressed 20, as shown in FIG. 3, the wrinkle holding and positioning member 3 is pressed by the upper die 12 and contracted in the a direction against the elasticity of the spring support portion 5. In this state, wrinkle control of the pressed material 20 can be performed.

As described above, according to the press die 1 of the present embodiment, there is no need to provide a relief hole or the like for a positioning gauge on the upper die 12 side as in the conventional example. Can be simplified, and the die strength of the upper die 12 can be reduced.

The present invention can be applied not only to the press die for performing the above-described drawing, but also to various press machines for performing various processes such as punching and bending.

[0025]

According to the present invention, it is not necessary to provide a relief hole or the like for a positioning gauge on the upper die side as in the conventional example, and the manufacturing process of the upper die can be simplified. It is possible to provide a press die that does not cause a decrease in die strength of the die.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a press die according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a state in which a material to be pressed is sandwiched in the press die according to the embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view showing a state when a material to be pressed is pressed in a press die according to an embodiment of the present invention.

FIG. 4 is an operation explanatory view of a wrinkle holding and positioning mechanism in the press die according to the embodiment of the present invention.

FIG. 5 is a schematic partial sectional view showing a conventional press die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press die 2 Wrinkle holding and positioning mechanism 3 Wrinkle holding and positioning member 5 Spring support part 11 Lower die 12 Upper die 13 Cushion ring 13a Cushion pin 14 Slide mechanism 15 Base 16 Ram 20 Material to be pressed

Claims (2)

[Claims] 1. A press die having a lower die and an upper die for pressing a material to be pressed, and a cushion ring disposed on an outer peripheral portion of the lower die, wherein the upper die is provided on an upper surface of the cushion ring. A press die having a wrinkle pressing and positioning mechanism that expands and contracts in the vertical direction of the upper die in synchronization with the vertical movement of the lower die, and performs wrinkle pressing and positioning of the material to be pressed. 2. A press die having a lower die and an upper die for performing press working of a material to be pressed, and a cushion ring disposed on an outer peripheral portion of the lower die. A wrinkle holding and positioning member that performs wrinkle holding and positioning,
A press die, comprising a wrinkle holding and positioning mechanism comprising a spring supporting portion which constantly supports the wrinkle holding and positioning member toward the upper mold.