Welding device and welding method for bead-shaped thermistor and wire

Abstract

The embodiment of the invention discloses a welding device and a welding method for a bead-shaped thermistor and a wire. The device comprises a welding substrate and a pressing plate, wherein the top surface of the welding substrate is a plane, three grooves which communicating with one another are formed in the welding substrate, and the center lines of the grooves are on the same horizontal plane, and the pressing plate is used for fixing a wire and a lead which are filled in the groove. According to the welding device and the welding method, the operation difficulty of welding the lead and the wire of the bead-shaped thermistor is effectively reduced, the welding time is shortened, the success rate of single-time welding and the production efficiency are improved, the welding effect is better in consistency, and stress damage to the bead-shaped thermistor cannot be generated.

Description

technical field [0001] The present invention relates to the field of electrical equipment technology. More specifically, it relates to a bead thermistor lead and wire welding device and welding method. Background technique [0002] Common bead thermistors have 2 metal leads at the end, which are used to connect to the electrical circuit for temperature measurement. See the schematic diagram. figure 1 . [0003] The way the bead thermistor is connected to the temperature measurement electrical circuit is usually by welding (ie, electric soldering iron + solder) to weld the metal lead to the wire in the circuit, and finally add a layer of heat shrinkable sleeve for electrical insulation. See the schematic diagram. figure 2 . [0004] Bead thermistors are small in size (the head is only a few millimeters), light in weight (usually less than 1g), thin in lead (common wire diameter is only 0.3mm), and the nickel-plated protective layer on the surface of the lead is prone to p...

AI Technical Summary

Problems solved by technology

[0004] The size of the bead thermistor is small (the head is only a few millimeters), light weight (usually less than 1g), the lead wire is thin (the common wire diameter is only 0.3mm), and the nickel-plated protective layer on the surface of the lead wire is easily passivated. Difficult to tin and not easy to solder

[0005] The head of the bead-shaped thermistor is a key sensitive part and is relatively fragile. When using clip-type fixtures, due to the hardness of the fixture material and the clamping force are not well controlled, damage may occur on the surface of the head or even overall damage, affecting normal operation. use

Even if the lead wire can be clamped and welded by a clamp with a more suitable structure, the metal lead wire at the welding part will swing to a certain extent due to the contact force during the welding process, and the welder must control the relative position of the wire and the lead wire. Tinning and welding state control, the operation is very difficult, and the welding efficiency is low

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