KR-20260067248-A - Manufacturing device and method of manufacturing large shaft flanges for marine engines

Abstract

The present invention relates to an apparatus for manufacturing a large shaft flange for a ship engine and a method for manufacturing the same, which enables the manufacturing of a large shaft flange for a ship engine, which is conventionally produced by a free forging method, by a die forging method, thereby shortening the manufacturing period, significantly improving the precision of the product, and significantly reducing the production cost of the product. The above-described manufacturing apparatus and method for a large shaft flange for a ship engine can significantly shorten the manufacturing period by enabling the manufacturing of a large shaft flange for a ship engine, which is conventionally produced by free forging, using a die forging method. Additionally, by reducing dimensional deviations, the precision of the finished product can be significantly improved, thereby enhancing the reliability of the product for customers. Furthermore, it can increase the material recovery rate of the processed material and minimize post-processing costs, thereby having the effect of significantly reducing the production cost of the product.

Inventors

• 김종란

Assignees

• 김종란

Dates

Publication Date

20260512

Application Date

20241105

Claims (3)

1. A plurality of die blocks installed on the upper surface of the base; A die holder formed in a hollow shape and installed on the upper surface of the die block, with an insertion groove formed at the inner end of the upper surface; A hollow insert die that is inserted and mounted inside the above die holder, with a workpiece inserted into its inner surface; A ring die installed on the upper surface of the insert die and the die holder, wherein a fixing projection is formed protruding from the center of the lower surface so as to be inserted into the insertion groove of the die holder; An upper die installed to be positioned above the workpiece so as to press the upper surface of the workpiece, into which the lower end is inserted inside the insert die, to form the workpiece into a shaft portion and a flange portion; and A manufacturing apparatus for a large shaft flange for a ship engine, characterized by comprising: a ring punch installed on the upper part of the workpiece in replacement with the upper die so as to press the upper end of the flange portion processed by the upper die to form a rim.
2. In Article 1, A manufacturing device for a large shaft flange for a marine engine, characterized in that a cylindrical ejector is further inserted and installed inside the insert die so as to be positioned between the lower surface of the workpiece and the base.
3. In Article 2, A manufacturing apparatus for a large shaft flange for a marine engine, characterized by having a plurality of pushers further interposed between the upper end of a ring die installed on the upper surface of the insert die and the lower end of a ring die, which transmit the pressing force of the upper die to the ring die to separate the processed shaft flange from the insert die.

Description

Manufacturing device and method of manufacturing large shaft flanges for marine engines The present invention relates to an apparatus for manufacturing a large shaft flange for a ship engine and a method for manufacturing the same. More specifically, the invention relates to an apparatus for manufacturing a large shaft flange for a ship engine and a method for manufacturing the same, which enables the manufacturing of a large shaft flange for a ship engine, which is manufactured by a free forging method, by a die forging method, thereby shortening the manufacturing period, significantly improving the precision of the product, and significantly reducing the production cost of the product. The background technology and its problems are described below with reference to the drawings. FIG. 1 is a drawing illustrating a large shaft flange for a conventional ship engine. Referring to FIG. 1, a large shaft flange (1) for a conventional ship engine is formed with a cylindrical shaft portion (10) and a flange portion (11) formed at the top of the shaft portion (10) having a larger diameter than the shaft portion (10). A large shaft flange (1) for a conventional ship engine as described above is generally manufactured by a free forging method in which a workpiece is heated to a high temperature of about 1200°C and then the side portion of the heated workpiece is repeatedly pressed to gradually form it into the shape of a shaft flange. However, the conventional large shaft flange (1) for a ship engine, which is manufactured by a free forging method in which the workpiece is processed at a high temperature as described above and then the side portion of the heated workpiece is repeatedly pressed to gradually form a shaft flange shape, had the problem that the production period was very long, the material recovery rate was low, and the high post-processing costs resulted in a very high production cost. In addition, the conventional large shaft flange (1) for a ship engine, which is manufactured by the free forging method as described above, had a problem in that it could not secure product reliability from customers due to the large dimensional deviation of the finished product. FIG. 1 is a drawing illustrating a large shaft flange for a conventional marine engine. FIG. 2 is a drawing for explaining a manufacturing apparatus for a large shaft flange for a ship engine according to an embodiment of the present invention. FIG. 3 is a drawing illustrating a method for manufacturing a large shaft flange for a ship engine according to an embodiment of the present invention. The present invention will be described in detail below with reference to the attached drawings. FIG. 2 is a drawing for explaining a manufacturing apparatus for a large shaft flange for a ship engine according to an embodiment of the present invention, and FIG. 3 is a drawing for explaining a method for manufacturing a large shaft flange for a ship engine according to an embodiment of the present invention. Referring to FIGS. 2 and 3, a manufacturing device (1) for a large shaft flange for a ship engine according to one embodiment of the present invention comprises a plurality of die blocks (10), a die holder (11), an insert die (12), a ring die (13), an upper die (14), and a ring punch (15). A plurality of die blocks (10) of the manufacturing device (1) for a large shaft flange for a ship engine configured as above are formed with a planar shape in the shape of a square or a fan and are installed on the upper surface of the base (2). The die holder (11) is formed in a hollow shape and installed on the upper surface of the die block (10), and an insertion groove (110) is formed at the inner end of the upper surface of the die holder (11). The insert die (12) is formed in a hollow shape and is inserted and mounted inside the die holder (11), and a workpiece (3) is inserted into the inner surface of the insert die (12). The reason the insert die (12) and the die holder (11) are configured to be separable is to enable the production of shaft flanges of various sizes as a single device by replacing the insert die (12). In addition, the reason for installing the insert die (12) and the die holder (11) on the upper surface of the die block (10) as described above is to easily separate the shaft portion (30) of the shaft flange and the insert die (12) by removing the die block (10) from the lower surface of the insert die (12) and the die holder (11) after the large shaft flange for a ship engine has been manufactured, and then lowering the insert die (12) and the die holder (11) along the shaft portion (30) of the shaft flange toward the base (2) by the height of the die block (10). The ring die (13) has a fixing projection (130) formed protruding from the center of the lower surface, and is installed on the upper surface of the insert die (12) and the die holder (11) so that the fixing projection (130) is inserted into the insertion groove (110) of the die hol