Manufacture of magnesium alloy screws

This study reports the fabrication of LZ91 magnesium alloy screws using warm heading and thread-rolling processes. The proposed method consists of a two-stage warm heading process. This study presents an analysis of the material flow pattern of the billet inside the die by using finite element analy...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2013-09, Vol.68 (5-8), p.1285-1292
Main Authors: Hwang, Yeong-Maw, Hwang, Kai-Neng, Chang, Chia-Yu
Format: Article
Language:English
Subjects:
CAE) and Design
Computer simulation
Computer-Aided Engineering (CAD
Engineering
Finite element method
Friction factor
Industrial and Production Engineering
Lubricants
Magnesium alloys
Magnesium base alloys
Mathematical analysis
Mechanical Engineering
Media Management
Molybdenum disulfide
Original Article
Screws
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Summary:This study reports the fabrication of LZ91 magnesium alloy screws using warm heading and thread-rolling processes. The proposed method consists of a two-stage warm heading process. This study presents an analysis of the material flow pattern of the billet inside the die by using finite element analyses. This study also presents the effects of upper die velocity, temperatures, and friction factors on the heading loads and product quality. This paper also investigates the effects of the friction factor on the effective stress, effective strain, and tooth height in a thread-rolling process. Finally, warm heading and thread-rolling experiments were conducted using a self-designed die set and a MoS 2 lubricant. This study presents a comparison of the experimental values with the simulation results to verify the validity of the finite element models and the proposed warm heading procedures.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-013-4920-2