Based On The Anodic Conductor-rod With Large Current Output Of Resistive Measurement And Control Instrument Of Developing

As a big country in electrolytic aluminum production and consumption,our country have made many outstanding contributions in the aluminum production filed,but there is still have the problem of high energy consumption per unit of production continuously.The anode conductive rod is an important component in the electrolytic aluminium industry,connected by Explosion Welding or Friction Welding with aluminum guide rod and the steel talons.Due to the large difference about chemical performance between aluminum and steel in the joint of connected interface layer,there have a big difference of mechanical properties and conductive performance compared with other parts.It will affect the practicality of the guide rod if its welding quality is poor.At present,factory often detects the pre-installed anode conductive rod by macroscopic observation,this method unable to determine the actual welding situation of the joint,there is not a judgment standard for it and have a big randomness.The traditional NDT methods exist many practical problems such as difficulty in operation;high labor intensity;no production conditions;no real-time detection in the process of operation.In this paper,according to these objective problems,designs a real-time online NDT equipment to detect the welding quality of anode conductive joint use the relationship about voltage-drop and welding-area for the large-current constant outputting load on both sides of the guide-joint to measure the voltage drop responding the welding area.Maybe one day,it can be applied to the electrolytic aluminium industry.Firstly,this paper introduces the process of mechanical structure,using 3D design software SolidWorks finishes the left location and equilibrium structure;the right clamping structure of the guide-rod;the bottom supporting frame,mainly based on the characteristics of the anode guide-rod;the strength of the mechanical structure.And in the design of processing uses Simulation function to check and analyze each module of this structure.Secondly,this article describes the control system of the detector.To meet the requirements of data acquisition by controlling the thyristor conducting angle as a large constant current outputting resource and selecting the appropriate voltage and current sampling methods under the premise of precise measurement of the electrical signals.At the same time,compares it with the standard data which is deposited in the controller to make reasonable judgment of joint quality when it shows abnormal.Finally,this thesis uses the actual joint to detect the controlling system for the changing law of voltage drop under the condition of different current and area of joint through the detection of various forms of friction welding joints,And makes the joint distribution of the current field according to the changing law,and then provides a criteria for the quality of the welding joint detection.At last,completes the design of software and hardware in the whole detector system.After the design of hardware and software for the overall structure of the detector,making it to meet the different test conditions of the measurement requirements in the constant current mode.Ensuring the normal use of the anode in the electrolytic aluminum plant.