Automatic positioning screw tensile strength test fixture

Abstract

The invention belongs to the technical field of machinery, relates to a test clamp, and particularly relates to a tensile strength test clamp of an automatic positioning screw. The problems that the existing test clamp is inconvenient to use and operate; the clamp needs to be replaced according to the size of a test specimen, and the test accuracy is low are solved. The tensile strength test clamp of the automatic positioning screw comprises a first connector and a second connector; a mounting seat for positioning the head part of a bolt to be tested is arranged on the first connector; a draw bar is arranged on the second connector; an adjustable clamping mechanism for positioning the nail part of the bolt to be tested is arranged between the mounting seat and the draw bar; and the adjustable clamping mechanism can be driven to lock and position the nail part of the bolt to be tested when the draw bar axially moves far away from the mounting seat. The tensile strength test clamp of the automatic positioning screw has the advantages of being reasonable in design, simple in structure, convenient to use and operate, high in test accuracy, and free of replacement of the clamping mechanism; the test cycle is shortened; and the thread stripping risk is also reduced.

Description

Technical field [0001] The invention belongs to the technical field of machinery, and relates to a test fixture, in particular to an automatic positioning screw tensile strength test fixture. Background technique [0002] With the continuous development of machinery in the direction of miniaturization, high-speed, and heavy-duty, screws with threaded fasteners on their heads, as key components in mechanical parts, are also constantly developing in the direction of small size and high strength. However, frequent fractures also follow. How to accurately and quickly determine the mechanical properties of the screw and the cause of the fracture failure is particularly important to improve the service life and reliability of the mechanical assembly. In the analysis of screw fracture, how to obtain a clean and non-deformed fracture is the most basic and important link in the process of bolt fracture failure analysis. The national standard does not specify a special fixture for screw t...

AI Technical Summary

Problems solved by technology

However, the above scheme still has defects such as inconvenient use and operation, the need to replace the fixture according to the size of the test piece, the risk of thread tripping, and inaccurate test results.

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