Apparatus and method for reliability screening

Abstract

The invention discloses an apparatus for reliability screening, comprising a vibration platform and a bevel clamp, wherein the bevel clamp is fixed on the vibration platform; a movable coil of the vibration platform pushes the bevel clamp to vibrate in a vertical direction; and the bevel of the bevel clamp is inclined to the direction. Besides, the apparatus further comprises a set of rapid temperature change test boxes and an insulating board arranged between the rapid temperature change test box and an electromagnetic vibration platform. Furthermore, the invention also provides a three-dimensional vibration stress test method and a temperature and three-dimensional vibration compound stress test method applying the apparatus. By applying the apparatus and the method for reliability screen test, the invention has remarkable effect; in addition, the apparatus has simple structure and lower cost, and is convenient to promote and use.

Description

technical field [0001] The invention relates to a product detection device and method, in particular to a product reliability screening device and method. Background technique [0002] With the development of the economic level, due to the continuous improvement of people's requirements on the technical performance and structure of electronic and electrical products, while the technical progress of materials and processes is relatively lagging behind, the problem of product reliability has become more prominent. The external environmental stresses that affect the reliability of the product during use include: temperature, vibration, low air pressure, humidity, impact, etc. [0003] Specifically, in the actual environment, the product is often subjected to vibration energy in three axes at the same time, rather than vibration in a single axis, but the vibration energy in the three axes is different, but most of the cases satisfy this distribution : The sample is vibrated in ...

AI Technical Summary

Problems solved by technology

The equipment is expensive, the input cost is high, and this device requires multiple air hammers (generally 8) to achieve six degrees of freedom vibration, that is, X-axis linearity, Y-axis linearity, Z-axis linearity, X-axis rolling, Y-axis rolling, Z-axis Vibration in six directions such as shaft rolling

Due to the complexity of the vibration mode, the existing control technology fails to realize the controllability of the vibration frequency, that is, the user cannot select and change the vibration frequency range according to the needs of the test; , complex structure, complex operation, prone to failure

The typical vibration frequency of the equipment ranges from 1Hz to 10000Hz. Due to the non-adjustable vibration frequency, its application is limited. In particular, the vibration frequency of many civilian products is usually lower than 500Hz. If the vibration frequency cannot be adjusted, it must be applied. Vibration energy in the higher frequency range is applied to the product, often resulting in additional damage to the product (improper or overtested)

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