Instantaneous powder flux regulation system for Laser Metal Deposition

被引：30
作者：
Arrizubieta, Jon Inaki [1 ]
Martinez, Silvia [1 ]
Lamikiz, Aitzol [1 ]
Ukar, Eneko [1 ]
Arntz, Kristian [2 ]
Klocke, Fritz [2 ]
机构：
[1] Univ Basque Country, Dept Mech Engn, UPV EHU, Plaza Torres Quevedo 1, Bilbao 48013, Spain
[2] Fraunhofer Inst Prod Technol IPT, Steinbachstr 17, D-52074 Aachen, Germany
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2017年 / 29卷
基金：
欧盟地平线“2020”;
关键词：
Laser; LMD; Powder flux; Regulation; Solenoid valves; PARAMETERS; GEOMETRY;
D O I：
10.1016/j.jmapro.2017.07.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new control system for regulating the powder flux during the laser metal deposition process (LMD) has been designed, developed and validated. The powder regulation system is based on a solenoid, which is coupled to the LMD nozzle and controlled by means of a Pulse Width Modulation (PWM) signal. Thanks to this system, the deposited clad height can be regulated depending on the process parameters, what allows obtaining a more homogeneous layer height and results in a more stable process. The material over-height at the beginning of the clad has been completely avoided when the control is applied. The material accumulation in corners where the deposition direction is changed has been also reduced from 0.65 mm to 0.35 mm. Furthermore, simulations of the nozzle and the powder particle stream have been carried out in order to validate the designed system and analyze the powder particle distribution at the nozzle exit. (C) 2017 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：242 / 251
页数：10
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