WAW-300B microcomputer controlled electro-hydraulic servo universal testing machineDetailed product description：

1 Introduction
The main body of the WAW-300B microcomputer controlled electro-hydraulic servo universal testing machine adopts a cylinder mounted main body, mainly used for tensile, compression, bending, and shear tests of metals and non metals. Suitable for fields such as metallurgy, construction, light industry, aviation, aerospace, materials, universities, research institutions, etc. The experimental operation and data processing comply with the requirements of GB228-2002 "Metallic Tensile Test Method for Room Temperature Materials". Appearance as shown in the picture;

2 Scheme Description
2.1 Host
The main engine adopts a bottom mounted oil cylinder type, with the stretching space located above the main engine, and the compression, bending, and shear testing spaces located between the lower crossbeam of the main engine and the worktable.
2.2 Transmission System
The lifting of the lower crossbeam is driven by a motor, nut, and screw pair to adjust the stretching and compression space.
2.3 Hydraulic system
The hydraulic principle is shown in Figure 2, which is a load adaptive oil inlet throttling speed control system.
The hydraulic oil in the oil tank is driven by a motor to enter the oil circuit through a high-pressure gear pump, and flows through a one-way valve, a 10 μ high-pressure oil filter, a differential pressure valve group, and a servo valve before entering the oil cylinder. The computer sends control signals to the servo valve to control the opening and direction of the servo valve, thereby controlling the flow into the oil cylinder and achieving control of constant speed test force, constant speed displacement, etc.

2.4 Safety Protection Devices
a) When the test force exceeds 2% -5% of the maximum test force for each gear, overload protection is activated and the system is unloaded.
b) When the piston rises to the upper limit position, the stroke protection stops and the oil pump motor stops.

Performance and technical indicators of 3 WAW-300B microcomputer controlled electro-hydraulic servo universal testing machine
3.1 Maximum test force: 300kN;
3.2 Test force measurement range: 1.2KN-300kN;
3.3 Accuracy of test force indication: ± 1%;
3.4 Piston stroke: 250mm;
3.5 Maximum piston movement speed: 80mm/min;
3.6 Displacement measurement resolution: 0.01mm;
3.7 Maximum tensile test space: 550mm (including piston stroke, customizable)
3.8 Maximum compression space: 380mm (customizable)
3.9 Flat specimen clamping thickness: 0-15mm
3.10 Circular specimen clamping diameter: 10-32mm
3.11 Pressure Plate Size: φ 160 mm
3.12 Bending test roller spacing: 350 mm
3.13 Roll width: 140mm
3.14 Clamping Method: Hydraulic Clamping
3.15 Sensors and amplifiers: oil pressure sensors, programmable amplifiers inserted into PCs, automatic zeroing and calibration
3.16 Host dimensions: 720 × 580 × 2000mm