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The remanufactured laser - based three-dimensional coaxial powder feeding head

Author: LiuYunWu
Tutor: YangXiChen；WangYunShan
School: Tianjin Polytechnic University
Course: Mechanical Design and Theory
Keywords: Laser Remanufacturing Three - dimensional coaxial powder feeding head DPIV Powder Focus Velocity field Concentration field
CLC: TG174
Type: Master's thesis
Year: 2004
Downloads: 254
Quote: 12
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Abstract


Remanufacturing laser is a laser cladding technology as the core of the emerging green remediation technology . It can realize the quick fix of major parts , reduce costs and gain time for enterprises to participate in market competition . Coaxial powder feeding head , laser remanufacturing the key components of the system , involving laser -material interaction many basic issues , carry out the three-dimensional coaxial powder feeding head has important theoretical significance and application value . This paper introduces the principle of laser remanufacturing technology , review the status of research and development at home and abroad . Particles heated state , the light energy allocation model and the concentration of powder flow field model , interactions were more in-depth theoretical analysis of light powder . Mechanical design theory, design new powder feeding three - dimensional space , the powder beam focus adjustable head . The first to incorporate digital particle image velocimetry ( DPIV ) to design a the powder jet velocity and concentration field test program , and the actual detection of the velocity and concentration field of powder flow beam under different working conditions . Carried out the practical application of powder feeding head pilot study to use in the development of three - dimensional powder feeding head parts and stainless steel guide sleeve pilot study on large - area laser remanufacturing , and achieved good results . The influence of process parameters on the powder utilization, and quality of the cladding layer . The tests showed that the focus of coaxial powder feeding head with omnidirectional and powder jet regulation characteristics . The main technical parameters are as follows : Focus: lens / reflector focusing powder feeding : carrier gas / non- carrying gas phi axis angle : 0 ° -360 ° Ψ -axis angle : -60 ° - 60 ° powder utilization : carrier gas type ≥ 30 % , non- carrying gas ≥ 60%

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection
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