Introduction

The WES-1000B microelectromechanical hydraulic servo universal material testing machine is a high-precision material testing equipment that uses hydraulic power source drive, electro-hydraulic servo control technology, computer data acquisition and processing, and can achieve closed-loop control and automatic detection. It consists of four parts: testing host, oil source (hydraulic power source), measurement and control system, and testing equipment. The maximum test force is 1000KN, and the accuracy level of the testing machine is better than level 1.

The WES-1000B microelectromechanical hydraulic servo universal material testing machine is a product with strong universality, which can meet various standard tests in the national regulations on metal tensile testing. It can also perform tensile, compression, bending, shear and other types of tests on different materials or products according to other standards (with optional fixtures). It can obtain performance indicators such as tensile strength, yield strength, specified non proportional tensile strength, elastic modulus, etc. of the tested material, and can achieve closed-loop control of constant rate loading, constant rate deformation, constant rate displacement, constant rate strain, etc. It can be used for process qualification performance verification tests of materials or products.

The testing machine is a six column, dual space structure, with a tension space between the upper and lower crossbeams and a compression space between the lower crossbeam and the test bench. The testing space is automatically adjusted by driving the lower crossbeam up and down through the rotation of sprockets and screws. Hydraulic controlled clamping jaws are installed on the upper and lower crossbeams, and standard models are equipped with V-shaped and flat jaws for clamping cylindrical and flat specimens for tensile testing; The bottom end of the lower crossbeam of the standard model is equipped with an upper pressure plate, and the test bench is equipped with a lower pressure plate with a spherical structure, which can be directly used for compression testing.

The design of the mainframe of the testing machine considers the possibility of expanding and assembling other fixtures to complete more experiments. For example, bolt fixtures can be used for bolt tension and load holding, bending fixtures can be used for bending tests of round bars or plates, shear fixtures can be used for shear strength tests of round bars, and anti bending, shear, splitting, elastic modulus meters can be added in compression space for concrete and cement block tests. In addition, various tests of the product can be completed by equipping fixtures such as steel balls, anchor chains, and fasteners.

Host structure and electrical principles

Host Structure

The main body of this equipment consists of a height adjustable support frame (composed of a machine base, screw rod, and moving crossbeam (lower jaw seat)) and a working frame (composed of a working oil cylinder, piston, table, bracket, and upper crossbeam (upper jaw seat)). Its working principle is: the high-pressure oil pump supplies oil to the working cylinder, and through the movement of the piston, the worktable and upper crossbeam (upper jaw seat) are pushed upward to perform tensile or compression tests on the sample. The tensile test is conducted between the upper crossbeam and the moving crossbeam of the host, and the compression test is conducted between the platform of the host and the moving crossbeam. The adjustment of the experimental space is achieved by driving the double screw synchronous rotation through the driving mechanism (lifting motor, sprocket, chain, etc.) to lift and lower the moving crossbeam.

Electrical Principles

This device uses three-phase 380V, 50Hz AC power supply. The main circuit includes the oil pump motor and the lifting motor. Fuses are connected to the main circuit and the control circuit respectively to prevent excessive current. A thermal relay is also connected in series before the oil pump motor and the lifting motor to prevent motor overload.

Technical Parameters