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research-article

A novel cold rotary forging method of producing multiple racks using one set of punch

[+] Author and Article Information
Xinghui Han

122#, Luoshi Road, Wuhan, China Wuhan, 430070 China
hanxinghuihlp@126.com

Yaxiong Hu

Luoshi Road 122#, Wuhan, China Wuhan, 430070 China
huyaxiong05@163.com

Lin Hua

122#, Luoshi Road, Wuhan, China Wuhan, 430070 China
hualin@whut.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4039112 History: Received June 29, 2017; Revised January 07, 2018

Abstract

When producing racks by cold rotary forging, the top punch and rack teeth definitely intervene and thus the top punch has to be amended, which makes the technical designing processes difficult and complex [1]. In this study, a novel cold rotary forging method of producing racks is put forward to avoid the interventions between the top punch and racks. Thus, the top punch need not be amended and the technical designing processes correspondingly become simple. In light of this presented method, a novel idea for cold rotary forging of producing multiple racks using one set of punch is motivated. The concrete researches are as follows. Firstly, the mathematical models are developed and three kinds of key forging conditions in cold rotary forging of racks are calculated to avoid the interventions between the top punch and racks. On the basis of these three kinds of key forging conditions, the workpiece is optimized and the cold rotary forging processes of racks with constant and variable transmission ratio are examined using FE simulations. The experimental researches are also conducted. The results show that for both racks with constant and variable transmission ratio, the obtained key forging conditions are effective and the presented cold rotary forging principles of producing multiple racks using one set of punch are feasible.

Copyright (c) 2018 by ASME
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