Hydraulic stretcher

Abstract

The invention discloses a hydraulic stretcher which consists of a mechanical transmission part and a hydraulic control part, wherein the mechanical transmission part comprises a machine body, a positioning clamping component which is mounted at one end of the machine body, and a stretching clamping component which is mounted at the other end of the machine body in a sliding manner; the hydraulic control part comprises a stretching hydraulic cylinder which is fixed with the machine body, and a first manual hydraulic pump which is connected with the stretching hydraulic cylinder; the piston rod of the stretching hydraulic cylinder is connected with the stretching clamping component; preferably, the stretching hydraulic cylinder is a bidirectional hydraulic cylinderpreferably; the first manual hydraulic pump comprises a first oil storage cylinder, a first manual reversing valve and a first operation handle; and the first oil storage cylinder is communicated with the stretching hydraulic cylinder through the first manual reversing valve and an oil conveying tube. The hydraulic stretcher has the advantages that the manual hydraulic pump is adopted as a power source for stretching and compressing a metal material, and electromagnetic signals are not generated, so that magnetic signal measurement on the surface of the metal material is not influenced, and the magnetic property testing accuracy of the metal material can be improved.

Description

technical field [0001] The invention relates to the technical field of testing mechanical properties and magnetic properties of metal materials, in particular to a hydraulic stretching machine specially used for tensile deformation testing of mechanical properties and magnetic properties of metal materials in zero magnetic space. Background technique [0002] Tensile testing machines are widely used in metallurgy, steel, machinery manufacturing, petrochemical, metrology and quality inspection and other industries to test the strength and fatigue resistance of their products. In the field of scientific research and teaching, tensile testing machines are often used to perform experiments to measure or assist in the measurement of material properties, such as the mechanical properties, magnetic properties, and acoustic properties of materials. The existing tensile testing machine is mainly driven by the motor to control the gear transmission to move the beam up and down to real...

AI Technical Summary

Problems solved by technology

The existing tensile testing machine is mainly driven by the motor to control the gear transmission to move the beam up and down to realize the stretching and compression of the material; The electromagnetic signal generated in the state will affect the magnetic field signal of the metal material, especially under the zero external magnetic field, it will seriously interfere with the measurement of the magnetic signal on the surface of the metal material, affecting the test results of the magnetic properties of the metal material

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