目前压力试验机的声卡机架分为两种结构类型，一是根据四根立杆组合型，二是总体铸造件构造。

       At present, the sound card frame of pressure testing machines is divided into two types of structures: one is based on the combination of four upright rods, and the other is the overall casting structure.

　　总体铸造件式生产加工成本比较高，但不变形;而组合型构造尽管生产成本低，销售市场价格比较低，甚至有一些压力试验机生产厂家的整个设备价格行情在一万左右，目前市面上此结构试验仪市场占有率也很多，但此结构遇到的问题较多。

       The overall cost of casting production and processing is relatively high, but it does not deform; Although the production cost of the combined structure is low and the sales market price is relatively low, there are even some pressure testing machine manufacturers whose entire equipment price is around 10000 yuan. At present, there are many market shares of this structure tester, but this structure encounters many problems.

　　声卡机架组合型的压力试验机是由四根立杆支撑点试验仪的上压板，而四根立杆是依靠左右螺母锁紧，假如球座缺乏足够的可玩性

       The pressure testing machine of the sound card rack combination type is supported by four upright poles to support the upper pressure plate of the testing instrument, and the four upright poles are locked by left and right nuts. If the ball socket lacks sufficient playability

　　有可能出现几个问题：

       Several issues may arise:

       一是此四根立杆卡紧后有效长度要一致，确保上、下压板在一定区域范围平面度;

       Firstly, the effective length of these four upright rods after being tightened must be consistent, ensuring the flatness of the upper and lower pressure plates within a certain area;

　　二是在长期性混泥土破型震动中，卡紧立杆的螺帽非常容易松脱，螺牙易损坏，造成上、下压板不相等，实验数据毫无疑问失真。

       Second, in the long-term concrete breaking vibration, the nuts that clamp the upright pole are very easy to loosen, and the screw teeth are easy to damage, resulting in the unequal upper and lower platens, and the experimental data is undoubtedly distorted.

       以上是关于压力试验机小知识点，大家还有不理解的，关注迈捷实验设备，欢迎大家前来选购！

       The above are some small knowledge points about pressure testing machines. If you still don't understand, please follow the Meijie experimental equipment and welcome everyone to come and purchase!