JP2906954B2 - Forging press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging press which presses a workpiece after heating the workpiece to a predetermined temperature.

[Prior art]

FIG. 3 shows a schematic process of a product processed by a forging press, and FIG. 4 shows a front view of a conventional forging press for a rough finishing process and a finishing process. When a product is manufactured by a forging press, press working is performed after heating a processing member to a predetermined temperature. For example, after heating a cylindrical material 11 as shown in FIG. 3 (a) in a furnace, First, a rough finishing process is performed by a rough finishing forging press, and FIG.
The finished product 12 becomes a rough finished product 12 as shown in FIG. 3 (b), and then is subjected to a regular finishing process by a finish forging press to become a finished product 13 as shown in FIG. 3 (c). Complete.

[0003] As shown in FIG.
This is performed using various types of press machines. That is, in the rough finish forging press 101 for processing the heat-treated material 11 into the state of the rough finish product 12, as shown in FIG. 4A, the processed shape of the rough finish product 12 is formed in the lower die holder 102. The upper die 1 is fixed while the lower die 103 is fixed.
The upper punch 105 is configured to be fixed to 04.
In addition, as shown in FIG. 4B, the finish forging press 111 has a lower die 112 having a processed shape of the finished product 13 fixed to a lower die holder 112, and an upper die holder which can move up and down. An upper punch 115 is fixed to 114.

Accordingly, the two presses 101, 111
In two steps, the product is processed by forging play molding from the material 11.

[0005]

However, in the above-mentioned conventional forging press, for example, a finish forging press 1
At the time of press working by No. 11, as shown in FIG.
After the processing, the upper punch 115 and the finished punch 13 are easily separated from the upper punch 115 of the upper die holder 114.
The mold release agent 14 is sprayed on the surface of. At this time, if the working mold (upper punch 115) is heated by performing the pressing process a predetermined number of times (about 100 times) or more, the sprayed release agent 14 surely adheres to the surface of the upper punch 115. However, if the upper punch 115 is not sufficiently heated, as shown in FIG. 5B, part of the release agent 14 sprayed on the surface of the upper punch 115 is peeled off and the lower die 11 is removed.
3 falls on the rough finished product 12 above.

When the release agent 14 falls on the rough finished product 12 as shown in FIG.
The release agent 14 accumulates at the bottom of the concave portion 12a, and finish press working is performed in this state. Then, as shown in FIG. 7, due to the release agent 14 attached to the rough finished product 12, the meat does not flow into that portion during forging, and the concave 13
a occurs. The finished product 13 is machined after forging, but if it is to be held on a lathe or the like, the centering becomes insufficient due to the recess 13a of the finished product 13, and the machining accuracy of the machining decreases, resulting in a defective product. There was a problem that would.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a forging press in which a sprayed release agent is surely removed to reduce defects.

[0008]

In order to achieve the above object, a forging press according to the present invention has a lower die fixed to a lower die holder of an apparatus main body, and is capable of moving up and down with respect to the apparatus main body. An upper die punch is fixed to the upper die holder, and a forging press for performing plastic working on the processing member by pressing the processing member mounted on the lower die from the upper side with the upper die punch, Movement of the upper die holder through the release agent discharge hole that penetrates the upper die punch from the processing surface to the outside
It is characterized by being formed linearly along the direction .

[0009]

In the forging process, the working member placed on the lower die is pressed from above by the upper mold punch, so that the working member is subjected to plastic working. At this time, when the release agent sprayed on the upper die is falling on the processing member, the upper die is pressed against the processing member, and the portion surrounded by both is pressurized. The accumulated release agent is extruded and discharged from a release agent discharge hole penetrating the processing surface and the outside.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a partially cutaway front view showing a forging press according to one embodiment of the present invention, and FIG. 2 is a schematic view showing a working state of the forging press. Note that members having the same functions as those in the related art are denoted by the same reference numerals, and redundant description will be omitted.

In the forging press of this embodiment, as shown in FIG. 1, a lower die 33 having a processing shape 32 formed on a lower die holder 31 is fixed, while a spherical upper die is mounted on an upper die holder 34. A punch 35 is fixed, and the upper punch 35 is configured to be vertically movable with respect to the lower die 33. The upper punch 35 is formed with a release agent discharge hole 36 penetrating from the processing surface to the outside, and the formation position is shifted from the center O of the upper punch 35 by a distance L. I have.

At the time of forging using the forging press of the present embodiment, as shown in FIG. 2, the upper punch 35 descends with respect to the processing member 12 placed on the lower die 33. By pressing this, the working member 12 is subjected to plastic working. At this time, the upper die 35 is pressed against the processing member 12 to pressurize the room 15 surrounded by them, so that the release agent 14 sprayed on the upper die 35 is put on the processing member 12. If the release agent 14 falls and accumulates, the release agent 14 accumulated here is discharged to the outside through the release agent discharge hole 36 together with the pressurized air in the room 15.

The release agent 14 adhered to the processing member 12 is discharged to the outside through the release agent discharge hole 36 at the time of dropping by the upper punch 35, and the release agent 14 There is no dent due to residue, and the product for machining such as a lathe can be held securely.Accurate centering does not reduce the machining accuracy of machining. Can be reduced.

[0015]

According to the forging press of the present invention, as described above in detail with reference to the embodiments, the lower die is fixed to the lower die holder of the apparatus body, while the upper die holder is movable vertically. In a forging press that fixes the upper die punch and presses the processing member placed on the lower die from the top with the upper die punch to perform plastic working on the processing member, from the processing surface to the upper die punch Above the release agent discharge hole penetrating outside
Since the upper die is formed linearly along the moving direction of the die holder , the upper die presses against the processing member, and the portion surrounded by the two is pressed, whereby the separation remaining on the processing member is pressed. The mold agent is reliably discharged to the outside through the release agent discharge hole together with the pressurized air, which can prevent dents due to residual mold agent on the processed product, and can also be used for lathes after forging. Therefore, it is possible to securely hold the product for machining, thereby preventing a decrease in machining accuracy of the machining, and as a result, it is possible to reduce defects.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a forging press according to one embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a processing state by a forging press according to the present embodiment.

FIG. 3 is a process schematic diagram of a product processed by a forging press.

FIG. 4 is a front view of a conventional forging press for a rough finishing step and a finishing step.

FIG. 5 is a schematic view showing a state in which a release agent is sprayed and dropped in a forging finishing process.

FIG. 6 is a schematic view illustrating forging processing in a state where a release agent remains.

FIG. 7 is a cross-sectional view of a product after forging in a state where a release agent remains.

[Explanation of symbols]

 11 Material 12 Rough Finished Product 13 Finished Product 14 Release Material 31 Lower Die Holder 33 Lower Die 34 Upper Die Holder 35 Upper Die 36 Release Release Material Release Hole

Claims (1)

(57) [Claims] 1. A lower die is fixed to a lower die holder of an apparatus main body, while an upper die is fixed to an upper die holder movable up and down with respect to the apparatus main body, and is placed on the lower die. in forging press performing plastic working on said workpiece by pressing by the upper mold punch from above against the workpiece that is, the release agent discharge hole that penetrates to the outside from the working surface to the upper mold punch Along the moving direction of the upper die holder
A forging press characterized by being formed in a straight line .