Method of manufacturing crankshaft having weight-reducing forged holes

Inactive Publication Date: 2017-11-16
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The present invention relates to a method for manufacturing a crankshaft with weight-reducing forged holes. The technical effect of this invention is that it reduces the weight of a crankshaft while precisely forming it, which helps to improve the quality and prevent failures during manufacturing. Additionally, it allows for a reduction in the weight of the vehicle engine, increasing fuel efficiency and preventing environmental pollution.

Problems solved by technology

Therefore, the crankshaft has a complex influence on the overall size, mass, and fuel efficiency of the vehicle.

Method used

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  • Method of manufacturing crankshaft having weight-reducing forged holes
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  • Method of manufacturing crankshaft having weight-reducing forged holes

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Embodiment Construction

[0026]It is understood that the term “vehicle” or “vehicular” or other similar term as used herein is inclusive of motor vehicles in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum). As referred to herein, a hybrid vehicle is a vehicle that has two or more sources of power, for example both gasoline-powered and electric-powered vehicles.

[0027]The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,”“an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will...

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Abstract

A method of manufacturing a crankshaft having weight-reducing forged holes can achieve lightening and precise forming by additionally including a punching process of using an individual hydraulic press. The method includes steps of: heating a steel bar, performing busting such that the heated steel bar is disposed in a cavity of a mold to be produced as a first intermediate shape of a crankshaft, performing brokering such that the first intermediate shape is produced as a second intermediate shape, performing finishing such that the second intermediate shape is produced as a third intermediate shape, performing trimming such that the third intermediate shape is produced as a complete shape of the crankshaft by cutting portions other than the shape of the crankshaft, and performing punching such that holes are formed in the complete shape of the crankshaft.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims under 35 U.S.C. §119(a) the benefit of Korean Patent Application No. 10-2016-0057762, filed on May 11, 2016 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.BACKGROUND1. Field of the Invention[0002]The present invention relates to a method of manufacturing a crankshaft having weight-reducing forged holes, and more particularly, to a method of manufacturing a crankshaft, capable of achieving lightening and precise forming and having improved durability by additionally including a punching process of using an individual hydraulic press.2. Description of the Related Art[0003]In recent years, improvement in fuel efficiency has become important and antipollution measures have been increasingly enforced in the vehicle industry. Various methods, such as the development of alternative fuels, the improvement of engine efficiency, and design improvements, may be per...

Claims

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Application Information

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IPC IPC(8): B21K1/08B21D28/24
CPCB21K1/08B21D28/24B21J5/025B21J5/10B21D53/84F16C3/08F16C3/20B21J5/027B21J5/12B21J9/12B21D53/845
Inventor KIM, SUNG-HWANJANG, PIL-SUNGLEE, CHA-HWAN
Owner HYUNDAI MOTOR CO LTD
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