夜夜狠狠擅视频 I 夜夜欢天天干 I 夜夜精品视频 I 夜夜久久 I 夜夜看av I 夜夜撸 I 夜夜骑夜夜操 I 夜夜骚av I 夜夜骚av一区二区三区 I 夜夜视频 I 夜夜爽av I 夜夜爽妓女8888视频免费观看 I 夜夜爽爽 I 夜夜爽天天干 I 夜夜夜操 I 夜夜夜夜操 I 夜夜躁狠狠躁日日躁 I 夜夜躁狠狠躁日日躁av I 夜夜综合 I 一本不卡 I 一本大道东京热无码 I 一本大道久久久久精品嫩草 I 一本到 I 一本到av I 一本高清dvd在线播放 I 一本加勒比hezyo黑人 I 一本加勒比北条麻妃 I 一本加勒比波多野结衣

What is high strength bolt wedge load

Everyone is familiar with the tension test of bolts. The wedge load test that bolts need to do may be unfamiliar. In fact, both tests are completed by universal testing machine.
Here is a detailed introduction to wedge load test and its difference from tensile test.
First of all, we will introduce what is wedge load test. Load test uses gaskets with a certain angle to pull bolts. It is called load test mainly because products such as fasteners are used to fix things.
The fasteners are not always vertical when they are fixed, and may present different angles, and the mechanical properties of different angles are equally important to users.
The difference between the tensile test and the tensile test is that the tensile test refers to the mechanical properties of the bolts in the vertical state to judge whether they are qualified or not, while the load test refers to the tensile properties of gaskets with a certain angle.
Usually the bolts below M20 are wedged at 6 and 10 degrees, and above M20 are wedged at 4 and 10 degrees.
Next, we will introduce the wedge load test method. In wedge load test, wedge blocks with different angles are usually placed under the bolt head (clamp body). During the test, the pull rod of clamp body is clamped into the round clamp of universal testing machine and fixed well.
Then the tensile test was carried out to know the fracture of the specimen, and the test load was recorded. Special attention should be paid here to observe the specific location of the break when the bolt breaks. The test of the sample breaking in the length of the rod or the unscrewed thread is qualified.
However, for full-threaded bolts or bolts, such as those that break the unscrewed part of the thread, the specimen is also qualified even if it extends or extends to the fillet or head under the head before breaking.