Current status and development trend of electronic universal testing machine fixture

a. The development direction of the testing machine is to develop from the inspection of the sample to the inspection of the product (ie, finished product, semi-finished product), which requires the corresponding fixture to be used from the fixture originally used for the test of the standard sample to the fixture for the finished product inspection. development of. b. The use of the fixture develops in the direction of high efficiency and low labor intensity. In the past, the fixtures were generally mechanically locked, which was time-consuming and labor-intensive, labor-intensive, and inefficient. With the improvement of the working environment and the need for large-scale test (random sampling of the production line), the clamping mode of the fixture is developed from the original mechanical clamping to the air pressure clamping and hydraulic clamping. c. Fully automatic fixture: from the measurement of the sample size to the clamping, and then to the start of the test, and finally the test report is completed once. Such fixtures are costly and are only suitable for testing and inspection of large quantities of the same sample or finished product. d. The increase in environmental tests (high and low temperature tests) has increased the number of fixtures used for high and low temperatures. The increase in environmental testing (high and low temperature chambers) has made it difficult to design fixtures. We know that the national standards for high temperature tensile tests have provisions: the round sample is threaded and the plate sample has holes. Due to the fixed connection, the design of the fixture is relatively simple. However, the high and low temperature test is different. It is generally tested in a high and low temperature chamber, and its sample generally has a short gauge length (generally a normal temperature sample). In this way, the fixture must be installed in the high and low temperature chamber. The high and low temperature test is generally limited due to the stroke of the testing machine (the stroke of the testing machine when the standard fixture is installed), which requires the fixture to be small in size, and must meet the test force and be resistant. High temperature and low temperature are generally difficult to design. e. Increased number of continuous test fixtures. Since the past is generally a sample test, the stretching and compression of the sample are carried out separately (ie, the stretching and compression are performed by different jigs), and now the finished product is detected more and more, and the sample is in the same test. It has to be stretched, compressed, and highly efficient. It can only be stretched and compressed using the same fixture. f. Increased test fixtures for special industries. With the development of science and technology, some emerging industries have put forward new requirements for test fixtures, such as requiring small fixture structure, non-magnetic, corrosion resistance (testing in solution) and so on. Due to the special nature of the test machine fixtures and the constant emergence of new materials, the design of the fixtures has been in a passive situation. We encounter new materials every day and need to design new fixtures. We only have to summarize past successful experiences to adapt to new developments.

Final Drive

This column mainly shows the parts of the crawler excavator Final Drive.The Final Drive includes two parts: a Travel Motor and a Travel Gearbox.

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