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a. Whether the fixture is easy to use and safe.
b. Whether the clamp is firm and there is no slippage.
c. During the test, the sample breakpoint is good. The data is small in dispersion. (ie specimens are constantly jaws, jaws, parallel segments, or gauge length)
Rally machine jigs mainly from the following aspects:
a. Select the main fixture according to the maximum test force of the host. The maximum force that the fixture can withstand must be greater than or equal to the maximum test force of the host.
b. According to the non-standard configuration, or extended configuration, select some secondary fixtures. (For example, the extended configuration sensor is 10kN, and the selected secondary fixture can withstand a maximum test force of 10kN.)
c. According to customer sample selection jig. (For example: customer to provide sample shape, maximum test force, etc.)
d. What type of fixture is recommended for the customer? (Example: Rope samples less than 1mm in diameter, including steel wire, iron wire, thin wire, etc. You should clearly tell the customer that this kind of sample can only use the winding-type clamping method, but the sample elongation error is large).
How to determine whether the tension machine fixture is applicable
Judgment of the applicability of the fixture is difficult to define. Due to the particularity of the fixture structure, it is sometimes difficult to determine what kind of specimen is suitable for a kind of fixture. However, it cannot be said that there is no solution. The following points are for reference: