Barrel plating current intensity real-time online testing device

Abstract

The invention discloses a barrel plating current intensity real-time online testing device, which comprises a data acquisition and transmission module and a transducer module, wherein the data acquisition and transmission module consists a replaceable probe, an insulating protective sleeve, a switching device and a wire; the transducer module realizes feeble current to voltage signal conversion and nonlinear compensation, displays the detected current intensity, converts an acquired current signal to a 0 to 5 volt control voltage and outputs the 0 to 5 volt control voltage. The data acquisition part of the device can be placed in a barrel to be plated with a workpiece, so the concentration of plating liquid in the barrel and the actual conditions of a workpiece plating current during temperature change can be reflected, and under a condition of a known area of the replaceable probe, the current intensity of a workpiece in a barrel plating state can be acquired in real time according to the acquisition of the plating current of the probe. After the output of a power supply is regulated by using the output signal of the device, the constant current intensity control can be realized, so the problem of uneven plating thickness caused by incorrect calculation of the surface area of the workpiece is solved.

Description

technical field [0001] The invention relates to a test device, in particular to a real-time on-line test device for current density in the barrel plating process. Background technique [0002] At present, the electroplating process uses mature and fixed process parameters. The parameters such as solution composition, pH value, concentration and temperature in the plating tank are basically fixed. Therefore, it is only necessary to use different current density ranges according to different plating types. Electroplating can generally obtain the desired coating quality. When determining the current density, it is usually necessary to calculate the surface area of ​​the workpiece according to the type and quantity of the workpiece, and then set the output voltage value. [0003] According to the analysis of electroplating process factors, the current density is one of the most important parameters affecting the quality of electroplating. Because the electroplating process, esp...

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Problems solved by technology

[0010] It can be seen that the current density is the key process factor to control the quality of the coating. The traditional current density is determined by measuring the current of the external circuit and through the process test, which cannot be controlled by a microcomputer, which directly affects the quality of the electroplating.

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