Metal material plastic yield strength detection device

Abstract

The invention discloses a metal material plastic yield strength detection device which comprises a testing machine body, a lower cross beam is installed at the lower end of a support of the testing machine body, a lifting upper cross beam is arranged at the upper end of the support, and chuck mechanisms are fixedly installed in the middle of the upper surface of the lower cross beam and the middle of the lower surface of the lifting upper cross beam correspondingly. The chuck mechanism comprises an outer shell, mounting openings are formed in the two side walls of the upper end of the outer shell, a plurality of sliding rails are circumferentially and evenly arranged at the upper end of the inner wall of the outer shell, sliding fan-shaped clamping blocks are slidably mounted on the sliding rails, fan-shaped grooves are formed in the lower ends of the inner ends of the sliding fan-shaped clamping blocks, a vertically-arranged hydraulic telescopic rod is fixedly installed in the middle of the bottom end of the interior of the outer shell, and a lifting disc is fixedly installed at the top end of the hydraulic telescopic rod. According to the chuck mechanism, plate-shaped metal materials can be conveniently clamped, meanwhile, multipoint clamping and fixing can be conducted on columnar metal materials, clamping is firm, and using is convenient.

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 when the metal material yields, that is, the stress that resists micro-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 adopts two inwardly shrinking splint structures to clamp metal materials. This planar splint structure is suitable for clamping plate-shaped metal materials; When holding the test, the contact area between the planar splint structure on both sides and the columnar metal material is limited, and the contact area is only the tangent position between the planar splint and the columnar metal material. Small causes loosening and sliding of the clamping position, which will lead to in...

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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