Manufacturing method of precision alloy sampling resistor

Abstract

A manufacturing method of a precision alloy sampling resistor comprises the following steps: choosing a resistor alloy strip and two non-oxygen copper strips, washing the resistor alloy strip and the two non-oxygen copper strips, enabling the two non-oxygen copper strips to be respectively welded with two sides of the resistor alloy strip by using a high-power electron beam welding process, forming a whole resistor strip, stamping the resistor strip into a plurality of resistor bodies horizontally, or stamping a plurality of resistor bodies on a resistor alloy thin plate, adjusting the resistance values of the resistor bodies in stamping in real time, conducting follow-up improving process to the resistor bodies, and forming the precision alloy sampling resistor. Compared with the prior art, according to the manufacturing method of the precision alloy sampling resistor, production processes are reduced by more than one half, efficiency is improved by tens of times, after a real-time resistance value is modified, the resistor alloy strip is not wasted, cost is greatly lowered, and precision is greatly improved. Equipment manufactured by using the manufacturing method has the advantages of being good in performance, small in size, and little in material consumption.

Description

technical field [0001] The invention relates to a manufacturing method of a resistor, in particular to a manufacturing method of a precision alloy sampling resistor. Background technique [0002] Precision alloy sampling resistors are widely used as current sampling resistors in the fields of intelligent digital watt-hour meters, DC large current measurement, electronic computers, precision instruments, chargers and other electronic equipment. They are widely used current sensors, especially It is suitable for all kinds of electronic instruments produced by surface mount assembly technology. At present, in the production of precision alloy sampling resistors, the adjustment of the resistance value mainly depends on the later grinding, chemical corrosion and other methods, all of which are carried out after the completion of the resistor production; the obvious disadvantage of these methods is that the increase in production steps, subsequent grinding and Corrosion produces ...

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Problems solved by technology

At present, in the production of precision alloy sampling resistors, the adjustment of the resistance value mainly depends on the later grinding, chemical corrosion and other methods, all of which are carried out after the completion of the resistor production; the obvious disadvantage of these methods is that the increase in production steps, subsequent grinding and Corrosion produces dust and chemical pollution to the surrounding environment and waste of raw materials, and the processed resistors have polished holes, which affect the appearance, low precision, poor long-term stability, and poor thermal stability; it cannot meet the development trend of modern instrument miniaturization and environmental protection , cannot flexibly change the shape of the lead-out end, and it is difficult to adapt to the installation needs of various application forms

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