Investigation of the overlapping parameters of MPAW‐based rapid prototyping

Emerald - Tập 12 Số 3 - Trang 165-172 - 2006
Wurikaixi Aiyiti1, Wanhua Zhao1, Bingheng Lu1, Yiping Tang1
1State Key Lab for Manufacturing Systems Engineering, Xi′an Jiaotong University, Xi′an, People’s Republic of China

Tóm tắt

Purpose

To fabricate fully dense components with low costs, a rapid prototyping (RP) system based on micro‐plasma arc welding (MPAW) was developed. The appropriate process parameters were investigated to build the parts with good mechanical properties and surface smoothness.

Design/methodology/approach

A simplified overlapping model between deposited tracks was established to investigate the relationships among the overlapping parameters, such as the ratio of width to height of the deposited track cross‐section (λ), scan spacing and overlapping ratio. Some ER308L stainless steel parts were built by different overlapping parameters, and the surface smoothness, tensile strength and elongation of the parts were tested.

Findings

The overlapped surface smoothness, tensile strength and elongation of the parts built with larger λ were better than those built with smaller λ. The longitudinal tensile strength and elongation of the parts were better than the transverse data.

Research limitations/implications

The scanning direction obviously affected the tensile strength and elongation of the parts, so the multi‐directional scanning mode should be used to get isotropic parts.

Originality/value

This MPAW‐based RP system provides a solution to build fully dense metal parts with relatively lower costs. The appropriate process parameters can be obtained with the developed overlapping model.


Tài liệu tham khảo

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Emerald

Tập 12 Số 3

165-172

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