Welding method and welding structure of accelerometer movement

Abstract

The invention provides a welding method and welding structure of an accelerometer movement. The welding method comprises the steps that N belly bands are bundled at the combination position of an upper torquer and a lower torquer, and groove openings are formed between the belly bands, wherein N is larger than or equal to 2 and smaller than or equal to 10; spot welding is carried out on the belly bands, and the belly bands, the upper torquer and the lower torquer are fixed in advance; the position of the movement is adjusted to enable the central axis of the movement and a laser beam to form a preset angle, and the belly bands are continuously welded through the laser beam; and the groove openings of the N belly bands can effectively isolate welding stress to achieve low-stress welding, and in the continuous welding process, due to the fact that a certain preset angle is formed between the central axis of the movement and the laser beam, the edges of the belly belts are fully melted through energy of the laser beam, and the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a welding method and welding structure for an accelerometer watch core. Background technique [0002] The watch core of the quartz flexible accelerometer (hereinafter referred to as the accelerometer) is composed of an upper torque device, a pendulum assembly, a lower torque device and a belly band. When assembling the accelerometer watch core, the upper torque device, the lower torque device and the pendulum assembly are positioned by the V-shaped tooling, and the abdominal belt is put on the joint of the upper torque device, the lower torque device and the pendulum assembly, and then a certain pre-tightening force is applied. The three are clamped, and the upper torque device, the lower torque device and the abdominal belt are welded together by laser welding to realize the assembly of the watch movement. As the core component of the accelerometer, the assembly qual...

AI Technical Summary

Problems solved by technology

Insufficient laser incident energy will result in incomplete welding of the abdominal belt, increasing the number of repair welding and increasing the welding stress

Through the stress detection of the vertical weld seam direction on the circumference of the core belt in the current process, the stress difference between the two relative points has reached hundreds of MPa, and the circumferential distribution is extremely uneven, which affects the welding quality

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