Variable-angle oblique impact test clamp for thin-wall pipe fittings

Abstract

The invention discloses a variable-angle oblique impact test clamp for thin-wall pipe fittings. The variable-angle oblique impact test clamp is characterized by comprising a base, a rotatable oblique plate, a limited slip supporting block and a clamping frame, wherein double rows of inverted-T-shaped straight flute rails are arranged on the base, and the limited slip supporting block is arranged on the inverted-T-shaped straight flute rails; the base and the rotatable oblique plate are fixed through a pin roll and form a rotation pair between the rotatable oblique plate and the base; the other free end of the rotatable oblique plate is supported on the limited slip supporting block; a circular through slot is formed in the rotatable oblique plate; the center of the clamping frame is superposed with the center of the circular through slot; the clamping frame is fixed on the rotatable oblique plate; and a first wedge block and a second wedge block are arranged in the clamping frame. The clamp design method disclosed by the invention can realize stable and reliable clamping, in an oblique impact test, of thin-wall pipe fittings with different section shapes, so that section dimension variability and stress angle continuous variability can be realized in the test, and therefore, the problems such as a single test angle of a current test sample, a single section shape of the test pipe fittings, and the like are solved.

Description

technical field [0001] The invention relates to the technical field of automobile safety test devices, in particular to a variable-angle oblique impact test fixture for thin-walled pipe fittings. Background technique [0002] At present, thin-walled pipes refer to pipes whose outer diameter to wall thickness ratio is greater than 20. There are many parts in the car body structure with thin-walled pipe structures, such as the front longitudinal beam of the car. As we all know, in automobile safety accidents, most of the accidents are oblique collisions, so it is very necessary to study the oblique crashworthiness of thin-walled tubes. In the oblique impact test of the thin-walled pipe, since the thin-walled pipe will be subjected to a large pressure in the oblique direction, a fixture is needed to clamp it stably and reliably. There are many defects in the oblique impact test fixture for thin-walled tubes in the past. First, a fixture can only complete certain impact angle ...

AI Technical Summary

Problems solved by technology

There are many defects in the oblique impact test fixture for thin-walled pipes in the past

First, a fixture can only complete certain impact angle tests, and cannot realize the continuous change of the test angle; second, the cross-sectional shape of the test pipe is single. In the past, the fixture was only designed for circular thin-walled pipes, and the test objects were limited; Third, the size of the test pipe is single. In the past, the fixture was only designed for a certain thin-walled pipe size, and it was not possible to complete the variable diameter test.

The above three defects lead to the inability of the existing fixture design to meet the diverse requirements of the test

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