KR101129138B1 - Width controllable inserting die for forging crankshaft - Google Patents

Abstract

The present invention relates to a crankshaft forging insert die that is adjustable in width, and its object is to insert a crankshaft that can be applied to different engine types by bolting an angle die to one side of a journal die coupled to an insert die holder. It is to provide an insert die for the crankshaft forging that can be adjusted in width through the die holder.

The present invention provides a medium crankshaft forging apparatus; A TR device is mounted on the press, and an insert die holder is connected and installed, and a side die and a journal die are fixedly coupled to a coupling hole formed in the insert die holder, and the journal die is positioned between the journal die and the side die. An angle die is bolted to one side of the to adjust the web width, journal width, and pin width of the crankshaft forged in a single insert die holder.

Crankshaft, Journal Width, Pin Width, Web Width, Angle Die

Description

Width controllable insert die for forging crankshaft}

1 is an exemplary view showing a configuration according to the present invention

2 is an exemplary view showing an installation state of the present invention

3 is an exemplary insert die holder of a crank shaft forging die.

4 is a schematic view showing a crankshaft forging die.

* Explanation of symbols for main parts of the drawings

10: Anvil 20: Insert Die Holder

(21): Coupling Hole (30): Side Die

40: journal die 41: fastening hole

50: angle die 51: fastening hole

60: crankshaft 61: crank arm

(62): crank pin 70: banding die

80: forging device

The present invention relates to a crankshaft forging insert die that can be adjusted in width, and bolts of an angle die to a journal die installed in the insert die holder of the crankshaft forging device, without replacing the insert die holder, web width, journal The present invention relates to an insert die for forging a crankshaft for which a width and a pin width can be adjusted to forge another model's crankshaft.

In general, the crankshaft is a process of upsetting the ingot by primary heating in a heating furnace, forging with a round bar, machining to form a round bar groove, heating a processed round bar, and crank throw It consists of a forging die forging process, a process of separating the forged crank throw by using a hydraulic device for detaching the forging die, a heat treatment process, a sulfur, a finishing process, and a crankshaft product inspection process.

In the die forging process, the crankshaft is forged by a bending die, a side die, a side die, an angle die, a journal die, and the like, and the side die, the angle die, and the journal die are installed in an insert die holder to press a thial device. It is fixed to (TR device).

In the insert die holder, insert dies such as side dies, angle dies, journal dies, and the like are used in accordance with the model of the forged crank shaft, that is, to fit the web width, the journal width, and the pin width of the crank shaft.

However, as shown in FIG. 3, the insert die holder has coupling holes to which the insert die is coupled at regular intervals, thereby limiting the web width, the journal width, and the pin width in one insert die holder. That is, a suitable insert die for forging web width, journal width and pin width according to cylinder diameter and stroke should be installed in the insert die holder, but the installation gap of the insert die is fixed, so it can be installed in one insert die holder There was a limit to the spacing of the insert dies.

For example, insert dies that can be combined with an insert die holder of an engine type capable of working on a 1600 ton press are at least H21 / 32 (models with 21 cm cylinder diameter and 32 cm stroke of the engine). When the insert die for H17 / 28 is mounted, the gap between the coupling holes to which the insert die is coupled is not adjustable, which makes it impossible to adjust the gap of the insert die, thereby forging the crankshaft applicable to H17 / 28 engines. There was no.

That is, in order to forge a crankshaft applicable to different engine models, there is a problem in that the insert die holder itself must be changed according to the insert die to be installed.

In particular, when forging the crankshaft of the same cylinder diameter, but the engine's stroker can be applied to other engine models, cranks of different models through one insert die holder by adjusting the installation gap of the angular die and the journal die, respectively. Although the shaft can be forged, the conventional insert die holder and the insert die coupled thereto are not able to adjust the installation interval of the angle die and the journal die, and there is a problem in that the insert die holder itself needs to be replaced.

In addition, since the insert die holder for forging of the medium crankshaft is very large in size and has a high weight, it is very difficult to replace the work, a work delay occurs due to the replacement, and a safety accident may occur during the replacement work. There were various problems.

The present invention is to solve the above problems, its purpose is to bolt the angle die to one side of the journal die coupled to the insert die holder through a crank shaft that can be applied to different engine models through one insert die holder The present invention provides an insert die for forging a crankshaft that is adjustable in forging width.

Another object of the present invention is to forge different crank shafts without replacing the insert die holder, to improve production efficiency and to prevent safety accidents due to replacement work.

In the present invention, an insert die holder is connected to a TR device of a press, a side die and a journal die are coupled to the insert die holder, and an angle die is bolted to one side of the journal die. .

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary view showing a configuration according to the present invention, Figure 2 is an exemplary view showing an installation state of the present invention, Figure 3 is an insert die holder of a crank shaft forging die, Figure 4 is a crank shaft forging die As shown in the schematic diagram, the present invention is inserted into the insert die holder 20 and the insert die holder 20 is installed in the insert die holder 20, forging the side of the crank arm 61 when forging. A journal die 40 having a supporting side die 30, a plurality of fastening holes 41 inserted into the insert die holder 20 and penetrating both sides thereof, and the side die 30 and the journal die. An angle die 50 is positioned between the bolts 40 and bolted to the fastening hole 41 of the journal die.

The insert die holder 20 is a side die 30, the journal die 40, the angle die 50 is inserted and fixed, the coupling hole 21 is formed at a predetermined interval therein.

The journal die 40 is forged to adjust the angle of the crank arm during the forging operation, is coupled to the coupling hole 21 of the insert die holder to be located at the tip with respect to the direction of the crank shaft 60, at one side A plurality of fastening holes 41 are formed to penetrate another side surface.

In the forging process of the crank shaft 60, the angle die 50 adjusts the web width, the journal width, and the pin width together with the journal die 40, and is bolted to the fastening hole 41 formed in the journal die. That is, the fastening holes 51 corresponding to the fastening holes 41 of the journal die are installed penetrating both sides of the angle die 50, and the angle dies are bolted through the fastening holes 41 and 51. Is fixed to one side of the journal die coupled to the engagement hole of the insert die holder.

The side die 30 is forged to support the side when the crank arm is forged, and is fastened to the coupling hole 21 of the insert die holder 20 so as to be close to the end of the crank axis, that is, the bending die. .

According to the present invention configured as described above, the side die 30 and the journal die 40 are fixedly coupled to the coupling hole 21 of the insert die holder, and the journal die is located between the journal die 40 and the side die 30. Angle die 50 is bolted to one side of the (40).

In the present invention configured as described above, the gap between the journal die and the angle die that substantially adjusts the web width, the journal width, and the pin width during the forging operation of the crank shaft can be adjusted regardless of the coupling hole spacing formed in the insert die holder. By just replacing it, you can forge crankshafts for different engines.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

Thus, the present invention is to bolt the angle die to one side of the journal die fixed to the insert die holder, compared with the conventional insert die holder, it is easy to adjust the gap between the journal die and the angle die, and the web width of the crank shaft There are many effects such as easy adjustment of journal width and pin width.

Claims (1)

In the medium crankshaft forging apparatus; Insert die holder is connected to the TR device of the press, and the side die and the journal die are fixedly coupled to the coupling holes formed in the insert die holder, respectively, and one of the journal dies is located between the journal die and the side die. Insertion die for the crankshaft for adjustable width, characterized in that the angle die is bolted to the side.

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