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Welding method for guaranteeing tight connection between magnetic steel for accelerometer and base

A technology of fastening connection and welding method, which is applied in the field of welding to ensure the fastening connection between the magnetic steel and the base of the accelerometer, can solve the problems of high scrap rate, easy cracks in components and high cost of die-casting molds, and improve the welding performance. , The effect of high production qualification rate and high connection reliability

Inactive Publication Date: 2017-05-10
WUHAN AVIATION INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method first needs to design the die-casting mold. Because the coaxiality of the magnetic steel and the base has a great influence on the performance of the accelerometer, the requirements for the design and manufacture of the mold are high, and the cost of the die-casting mold is high; Cracks are easy to occur in middle components, and the scrap rate is high; in addition, the surface quality of die-casting components is low, and the coaxiality between the magnet and the base is not easy to ensure, and it needs to be machined again, which will have a certain damage to the connection and fastness of the magnet and the base , the connection reliability is low

Method used

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  • Welding method for guaranteeing tight connection between magnetic steel for accelerometer and base

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Embodiment 1

[0021] A welding method for ensuring that the accelerometer is firmly connected to the base with the magnetic steel, the method takes the following steps:

[0022] 1) A layer of nickel is plated on the surface of the magnetic steel with a thickness of 5μ to improve the welding performance of the magnetic steel;

[0023] 2) Put the magnetic steel and the base on the V-shaped fixture, so that the cylindrical surface of the magnetic steel is tangent to the V-shaped surface of the V-shaped fixture, and ensure that the coaxiality between the base and the magnetic steel is not greater than 0.05mm;

[0024] 3) Coating acidic flux 201 on the welding surface of the base, and using the acidic flux to corrode and remove the surface treatment layer on the welding surface of the base;

[0025] 4) The temperature of the electric soldering iron is controlled between 150°C and 250°C, and the base and the magnetic steel are welded with S-Sn60PbSbA solder, so that the magnetic steel and the bas...

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Abstract

The invention discloses a welding method for guaranteeing tight connection between magnetic steel for an accelerometer and a base, belongs to the technical field of manufacturing of accelerometer magnetic conductor modules, and relates to the welding method for guaranteeing tight connection between the magnetic steel for the accelerometer and the base. The method comprises the following steps: 1) a layer of nickel is plated on the surface of the magnetic steel to improve the welding performance of the magnetic steel; 2) the magnetic steel and the base are put on a V-shaped fixture, so that a cylindrical surface of the magnetic steel is tangential to a V-shaped surface of the V-shaped fixture, and the coaxiality of the base and the magnetic steel is not higher than 0.05 mm; 3) an acid welding flux is coated on a welding surface of the base, and is used for corroding to remove a surface treatment layer on the welding surface of the base; and 4) the temperature of electric soldering iron is controlled within 150-250 DEG C; and the base and the magnetic steel are welded by the flux. The welding method for guaranteeing tight connection between the magnetic steel for the accelerometer and the base has the characteristics of simple operation, low cost, high pass percent and high reliability.

Description

technical field [0001] The invention relates to a welding method for ensuring the fast connection between the magnetic steel for the accelerometer and the base, which belongs to the technical field of accelerometer magnetic conductor assembly manufacturing, and relates to a welding method for ensuring the fast connection between the magnetic steel for the accelerometer and the base. Background technique [0002] Usually, the magnetic steel and the base are fastened to form a magnetic conductor assembly. After the magnetic steel is polarized, a permanent magnetic field is generated around the magnetic steel, so that the torque coil with current flowing coaxially with the magnetic steel generates a magnetic torque to balance the force generated by the acceleration. Dynamic torque, the energized current of the torque coil is proportional to the acceleration, and the acceleration of the product can be measured by detecting the current of the torque coil. If the coaxiality betwee...

Claims

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Application Information

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IPC IPC(8): B23K1/00B23K1/20B23K3/08
CPCB23K1/00B23K1/20B23K3/087
Inventor 肖岸飞王鲲鹏
Owner WUHAN AVIATION INSTR
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