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磨料水射流光整加工及试验装置的研究
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摘要
磨料水射流复合电解光整加工是在磨料水射流作用的基础上复合电解加工。含有磨料的电解液从喷嘴喷出,在喷嘴与工件之间施加电解电压,电压范围为30~1000V,工件表面材料在电解和磨料水射流复合作用下被去除掉。
     由于磨料价格昂贵,需要反复利用,因此对液-固相进行分离。使之从零件上清除下来的切屑、油污,尘埃等杂物过滤出去。
     本课题的目的是建立一套磨料水射流复合试验装置,在这套装置上进行磨料水射流复合电解作用光整加工试验及其应用。通过分别对磨料水射流和电解复合磨料水射流采用正交试验及分析,验证可能影响加工效果的主要因素,他们包括靶距、射流压力、喷射倾角、加工时间、磨料粒度、电解电压以及电解液等因素。通过试验得出各因素对零件加工的影响规律,其中,靶距对零件的加工去除量有一定的影响,特别是对电解作用的电解电流影响较大;射流压力是一重要参数,对零件的表面粗糙度以及加工去除量影响较大;在试验角度±20°范围内,喷射倾角对加工效果几乎无影响;磨料粒度对零件加工以后的表面粗糙度和去除量均有影响,也是加工效率的重要标志;电压对电解的强弱起关键性作用,本文还针对各加工工艺参数的作用机理进行初步探讨,在进一步试验中,射流电压还可以更高一些。电解磨料水射流光整加工及试验装置具有参考意义和实用价值。
The process of abrasive water jet (AWJ) compound with electrolytic machine is based on AWJ. The nozzle of AWJ and the work piece is connected with the abrasive water jet and cathode of a DC power resource .The material of the work piece could be removed by AWJ and the function of electrolysis.
    The process of liquid-solid separation helps to filter such refuse ascutting scraps, greasy filths and dust from the spare parts and avoid the cost of abrasive materials. The purpose of this paper is to establish a set of compound experiments of abrasive water jet in which the electrolytic process of abrasive water jet is conducted and applied and to explore which factors of EAWJ have notable effect, and how to bound the variety range of those factors. By orthographical experiments and the analysis, to AWJ and EAWJ process, the notable effect factors have been selected . The standoff has some effect on cutting quality of work piece. The rate of material remove is influenced by the volume of electrolytic current. The pressure of water jet is one of the important factors that influences both the rate of material remove and the roughness of the work piece surface. Abrasive granularity has great influence on the work piece surface and the rate of material remove . The bigger abrasive granularity is, the larger of the roughness is and so is the volume of material remove. The voltage of the DC power resource (<360V) is a key factor that influences the current of the electrolysis. The angle of the nozzle to the work piece is not effective within 20 . In the further experiment, the pressure of the water jet could be increased and the electrolyte could be NaCl solution.
    The result of the experiment can be used to adjust the parameters of EAWJ process and can be used as a basis to design the equipment of EAWJ process.
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