Development trend of the hottest fixture

Fixture development trend

release date: Source: Internet editor: Chinese packaging browse times: 1023 copyright and disclaimer

core tip: the development direction of the testing machine is from the testing of test materials to the testing of products (i.e. finished products, semi-finished products), which requires the corresponding fixture to be developed from the fixture originally used for standard sample testing to the fixture used for finished product testing. The use of fixtures is developing in the direction of high efficiency and low labor intensity. In the past, fixtures were generally mechanically locked, which was time-consuming and laborious, labor-intensive and low efficiency. With the improvement of the working environment and the need for random sampling inspection of large-scale test production lines, the clamping method of fixtures has developed from the original mechanical clamping to pneumatic clamping, hydraulic clamping and other directions. From the sample size measurement to clamping, to the start of the test, and finally the test report is completed at one time

[China Packaging News] the development direction of the testing machine is from the testing of test materials to the testing of products (i.e. finished products and semi-finished products), which requires the corresponding fixture to be developed from the fixture originally used for standard sample testing to the fixture used for finished product testing. The use of fixtures is developing in the direction of high efficiency and low labor intensity. In the past, fixtures were generally mechanically locked, which was time-consuming and laborious, labor-intensive and low efficiency. With the improvement of the working environment and the need for random sampling inspection of large-scale test production lines, the clamping method of fixtures has developed from the original mechanical clamping to pneumatic clamping, hydraulic clamping and other directions. From the measurement of sample size to clamping, to the start of the test, and finally to the completion of the test report. The cost of this kind of fixture is very high, and it is only applicable to the existence test of the linear relationship between the test and inspection of the same sample or finished product in large quantities. The increase of environmental tests (high and low temperature tests), the increase of fixtures used for high and low temperature, and the increase of environmental tests (high and low temperature boxes) have increased the difficulty of fixture design. We know that the national standards for high temperature tensile tests all stipulate that round samples should be threaded, and plate samples should not have holes greater than 50mm. Because the connection method is fixed, the design of the fixture is relatively simple, but the high and low temperature tests are different. It is generally tested in high and low temperature boxes, and its samples are generally short gauge distance (generally normal temperature samples). In this way, the fixture must be installed in the high and low temperature box. The high and low temperature test is generally difficult to design because the travel of the testing machine is limited (the travel of the testing machine when installing the standard fixture), which requires the fixture to be small, meet the test force, and withstand high and low temperatures. In the past, it was generally sample preparation testing, and the tensile and compression of samples were carried out separately (that is, tensile and compression were carried out with different fixtures), but now there are more and more finished product testing, and the samples are subject to tensile and compression in the same test, with high efficiency. Only the same fixture can be used for tensile and compression. It is difficult to determine the applicability of fixtures. Due to the particularity of fixture structure, sometimes it is difficult for us to determine which kind of fixture is more suitable for the sample, but we can't say there is no way. There are the following points to determine: 1. Whether the fixture is convenient and safe to use; 2. Whether the clamping is reliable and free from slipping; 3. During the test, the breakpoint of the sample is good. Data discreteness is small

with the development of science and technology, some emerging industries have put forward new requirements for test fixtures, such as small and non-magnetic fixture structure, corrosion resistance in solution and so on. For example, due to the high hardness of the sample, the relatively loose internal structure, the uneven stress during the tensile test, and the easy wear of the jaws holding the sample, the fixture has not been well solved. The procurement of tensile testing machine with large test force and large diameter is 1-to-1 nylon rope. Due to excessive deformation, it is difficult to clamp, and the design of clamp is also a difficulty. Due to the particularity of the use of testing machine fixtures and the continuous emergence of new materials, the design of fixtures has been in a passive situation. We encounter new materials every day, so we need to design new fixtures and summarize the successful experience in the past

Shanghai Qingji Instrument Co., Ltd. develops and produces tensile testing equipment focusing on material inspection, peel test, fatigue test, adhesion test, environmental resistance test and other test equipment for key parts and components such as automotive functional parts and structural parts, as well as special mechanical property test equipment for some products. The overall design of the testing machine integrates the advanced technology of tilt technology instruments, with simple and convenient operation, beautiful appearance, stable and reliable performance. Welcome new and old customers to inquire or visit the factory to negotiate business