Positioning and pouring mold and method in clamping section of tubular sample

Abstract

The invention relates to a positioning and pouring mold and method in a clamping section of a tubular sample. The pouring mold comprises an inner mold and an outer mold, wherein the inner mold comprises an inner positioning section, an annular boss section and an outer fixing section which are sequentially connected into a whole from top to bottom; the inner positioning section can extend into thetubular sample in a matched manner and positions the tubular sample; a pouring mold cavity, a supporting step and a demolding hole surrounding the supporting step are sequentially machined on the outer mold from top to bottom; the supporting step is detachably and fixedly connected with the outer fixing section; and the demolding hole surrounding the supporting step is machined in the outer mold.Compared with the prior art, the coaxiality between the tubular sample and the clamping section can be effectively improved, the mold is suitable for brittle material pipes and has universality for positioning treatment of pouring of the clamping section of the tubular sample with smooth and flat inner walls of medium and small diameters, and the problem about pouring and positioning of the clamping section of the pipe sample with a rough outer surface is solved.

Description

technical field [0001] The invention belongs to the technical field of detection sample processing, and relates to a positioning pouring mold and method in a clamping section of a tubular sample. Background technique [0002] Axial tensile and torsion tests of tubular specimens are common test items in material mechanical performance testing. In order to obtain the mechanical performance parameters of the tubular sample more accurately, the clamping section of the tubular sample needs to be processed before the test. Whether the processing method of the sample clamping section is accurate and reliable often has a greater impact on the test results. Although there are corresponding national standards for the tensile and torsion tests of tubular samples, such as GB / T5349 "Experimental Method for Axial Tensile Properties of Fiber Reinforced Thermosetting Plastic Pipes", etc., the standard has specific requirements on the shape and size of the sample clamping section. The rele...

AI Technical Summary

Problems solved by technology

Whether the processing method of the sample clamping section is accurate and reliable will often have a greater impact on the test results.

Although there are corresponding national standards for the tensile and torsion tests of tubular samples, such as GB / T5349 "Experimental Method for Axial Tensile Properties of Fiber Reinforced Thermosetting Plastic Pipes", etc., the standard has specific requirements on the shape and size of the sample clamping section. The relevant description has been made, but the processing method of the clamping section has certain limitations, especially difficult to adapt to brittle pipe samples

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