A near-far double-end centering device

Abstract

The invention discloses a near-distal double-end centering device, comprising a clamp assembly, a main body assembly and an extensometer assembly. The two clamp assemblies include an upper clamp assembly and a lower clamp assembly respectively located on the upper and lower sides of the plate-shaped sample, and the upper and lower clamp assemblies are respectively used for clamping the upper and lower ends of the plate-shaped sample. The two body assemblies include an upper body assembly on the upper side of the upper clamp assembly and a lower body assembly on the lower side of the lower clamp assembly. The upper body assembly is used to pull the upper clamp assembly upward, and the lower body assembly is used to pull the lower clamp assembly downward. The upper body assembly and the lower body assembly each include a tenon rod and a first body, a second body and a third body which are connected in sequence along the vertical direction. The extensometer assembly includes a ceramic rod and an extensometer for measuring the deformation of the ceramic rod. Compared with the prior art, the centering device of the present invention can realize multiple angle adjustment, and finally make the plate-shaped sample in a vertical state, avoiding the problems of inaccurate data and waste of resources.

Description

technical field [0001] The invention relates to the technical field of creep test devices, in particular to a near-distal double-end centering device. Background technique [0002] With the continuous increase of the turbine inlet temperature of advanced aero-engines in recent years, the turbine blades, which are key components of aero-engines, also endure higher temperatures. This problem is usually solved with nickel-based single crystal superalloys with higher temperature capability and complex blade cooling structures. At present, high-pressure turbine single-crystal blades mostly adopt super-air-cooled double-wall structure, and the thinnest part of the wall thickness can reach the order of 0.5mm. [0003] Creep of metallic materials refers to the phenomenon that the material produces slow plastic deformation under the long-term action of high temperature and constant load. In order to accurately obtain the creep properties of the material, it is necessary to process ...

AI Technical Summary

Problems solved by technology

When testing thin-walled parts with a small cross-sectional area, only a small load needs to be applied to the creep machine, and when the creep test is performed under a lower load, due to the structure of the creep machine and the self-weight of the fixture, the lever type The lever system of the high temperature durable creep testing machine cannot obtain sufficient force transmission, so it cannot ensure that the upper and lower rods of the testing machine are on the same vertical line

Images