A metal material plastic yield strength testing device

Abstract

The invention discloses a metal material plastic yield strength detection device, comprising a main body of a testing machine, a lower beam is installed on the lower end of the bracket of the main body of the testing machine, a lifting upper beam is arranged on the upper end of the bracket, and the upper surface of the lower beam is The middle position and the middle position of the lower surface of the lifting upper beam are fixedly installed with a collet mechanism, and the collet mechanism includes an outer casing, the upper end of the outer casing is provided with installation openings on both side walls, and the inner wall of the outer casing is provided with installation openings. A plurality of sliding rails are evenly arranged on the upper end in a circumference, and sliding sector-shaped clamping blocks are slidably installed on the sliding rails. A vertically arranged hydraulic telescopic rod is fixedly installed at the position, and a lift plate is fixedly installed at the top of the hydraulic telescopic rod. The chuck mechanism of the invention is convenient for clamping the plate-shaped metal material, and can also clamp and fix the column-shaped metal material at multiple points, so that the clamping is firm and easy to use.

Description

technical field [0001] The invention relates to the technical field of metal material detection, in particular to a metal material plastic yield strength detection device. Background technique [0002] Yield strength is the yield limit of a metal material when it yields, that is, the stress that resists a small amount of plastic deformation. In the prior art, a universal material testing machine is usually used to test metal materials. [0003] The chuck of the existing universal material testing machine generally uses two inwardly shrinking plywood structures to clamp metal materials. This flat plywood structure is suitable for clamping plate-shaped metal materials; When holding the test, the contact area between the flat splint structure on both sides and the columnar metal material is limited, and the contact area is only the tangent position of the flat splint and the columnar metal material, so it is easy to be tested by the universal material testing machine because t...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a metal material plastic yield strength detection device to solve the problem that the chuck of the existing universal material testing machine proposed in the above-mentioned background technology generally adopts two inwardly shrinking splint structures to clamp the metal material, This planar splint structure is suitable for the clamping of plate-shaped metal materials; while the clamping detection of columnar metal materials, the contact area between the planar splint structure on both sides and the columnar metal materials is limited, and the contact area is only flat. The position of the cut surface between the splint and the columnar metal material is easy to loosen and slide in the clamping position due to the small contact clamping area during the detection of the universal material testing machine, which will lead to inaccurate detection results.

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