Device and method for carrying out thermocompression welding on enameled wires of pendulum components

Abstract

The invention provides a device and a method for carrying out thermocompression welding on enameled wires of pendulum components. The device comprises a base and a sliding shaft, wherein the base is cylindrical, a through stepped hole is formed in the central position of the base; the aperture of a big hole at the upper part of the stepped hole is a mounting hole for the sliding shaft; a ring-shaped boss is processed on the upper surface of the base, at the outer side of the stepped hole; a ring-shaped shallow slot is processed on the outer side of the ring-shaped boss; two arc-shaped non-closed surrounding structures symmetrically distributed are processed on the outer side of the ring-shaped shallow slot, and are separated by two shallow slots with different shapes. With the special design of the device, the supporting and positioning problems of a central pendulum of a pendulum plate and a moving coil of a torquer are solved, so that the reliable positioning on the pendulum plate is realized, the stability of welding is good, and the rate of finished products and the work efficiency are also greatly improved. For the welding method, a special welding technology is adopted, the welding quality is good, the welding parameters are stable and controllable, the consistency is good, the time for welding one pendulum component by adopting lead-tin welding is about 10 minutes, while the time for welding one pendulum by adopting the method is only about 4 minutes, the production efficiency is improved by 150%, and the product pass rate also reaches above 99.5%.

Description

technical field [0001] The invention relates to a device and method for thermocompression welding, in particular to a device and method for thermocompression welding of enameled wires of a quartz flexible accelerometer pendulum assembly, and belongs to the technical field of accelerometer production. Background technique [0002] The pendulum component is a key component for the quartz flexible accelerometer to detect external excitation. During its assembly process, the welding of the torquer moving coil and the gold-plated area of ​​the pendulum plate center plate is the electrical connection of internal and external signals. Unreliable connection will lead to the failure of the entire accelerometer. failure, so it is very important. At present, the commonly used welding process is soldering, which uses an electric soldering iron to weld the enameled wire of the torque converter moving coil to the gold-plated area through soldering tin. [0003] The defective that said pr...

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Problems solved by technology

[0004] In order to prevent the irregular volatilization of the flux from causing the output saturation failure of the accelerometer, the use of flux is not allowed during soldering. The highest pass rate is only about 90%, and the quality of solder joints is difficult to guarantee.

However, there is also a certain flux component (0.8% to 1.5%) in the solder, which is an important reason for the output saturation fault of the accelerometer

At present, manual electric soldering iron under a microscope is mainly used for welding. Due to the special structure of the pendulum component, the thickness of the quartz glass flat bridge is very thin, and there is a height difference between the diameter of the center disk and the outer ring due to the installation boss, and due to the poor positioning of the pendulum component, the pendulum component during welding. Chips are prone to cracking and breaking, because the gold area is thin, the operating space is small, the operation is difficult, and the enameled wire and the gold area are prone to welding defects, which requires high levels of workers and low production efficiency.

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