[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 3, pp.197-202

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2021

Received 07 May 2021 Revised 10 Jun 2021 Accepted 10 Jun 2021

DOI: https://doi.org/10.7735/ksmte.2021.30.3.197

농기계 변속기용 부변속 구동축의 축방향 열간 단조를 위한 성형해석

조영태^a^{, *}

Forging Analysis for Hot Axial Forging of Sub-shift Drive Shaft with Agricultural Machinery Transmission

Young-Tae Cho^a^{, *}

aDepartment of Basic Science, School of Eng., Jeonju University

Correspondence to: ^*Tel.: +82-63-220-2981 E-mail address: choyt@jj.ac.kr (Young-Tae Cho).

Abstract

Existing sub-shift drive shafts used for the transmission of agricultural machinery are manufactured using the cutting process; therefore, they fail frequently owing to the heavy loads and impacts associated with intensive agricultural work. This paper presents an analytical study to improve the durability of the sub-shift drive shaft via axial hot forging with a mold. A maximum axial load of 141 tons was required to forge a ø45 × 365 mm SCM420 round bar in a ø45 (ø74) × 303 mm mold through heating at 1000℃. During forging in the axial direction, metal flow lines were well-formed along the gear-forming shape. Thus, the durability of the shaft was improved during the gear-forming process, and the weight of the raw material was reduced by 58% compared with that under the cutting process.

Keywords:

Sub-shift drive shaft, Agricultural machinery, Forging analysis, Hot lateral forging, Metal flow line

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Young-Tae Cho

An associate professor at the Dept. of Basic Science, College of Engineering, Jeonju University, Jeonju, Korea.He is interested in mechanical design, FEM analysis and nondestructive testing and evaluation of infrared thermography.

E-mail: choyt@jj.ac.kr