This universal adopts a dual space floor standing structure, with the upper space stretched and the lower space compressed and bent. The host part consists of a floor standing frame consisting of four columns, an upper crossbeam, a middle crossbeam, and a worktable. The speed control system is installed at the lower part of the worktable, and is driven by a Japanese Panasonic AC servo motor with high speed control accuracy, wide range, and stable performance through a synchronous toothed belt reduction system to rotate the ball screw. The ball screw pair drives the middle crossbeam, and drives the stretching attachment (or compression, bending attachment) to move up and down, achieving loading and unloading of the sample. This structure has high stiffness, high efficiency, and stable transmission. The main components of the host are processed in the machining center to ensure the accuracy of the host.

Measurement parameters

vMaximum testing machine（kN）:50；

V testing machine level: 0.5 level;

Effective measurement range of test force: 0.4% -100% F.S;

vTest force measurement accuracy: superior to≤±0.5%；

vDisplacement measurement resolution:0.4μm；

vDisplacement measurement accuracy: superior to≤±0.5%；

Measurement range of V electronic extensometer: 0.4% -100% FS;

Electronic extensometerMeasurement accuracy: superior to≤±0.5%；

Control parameters:

vPower control speed range:0.001％～5％FS/s；

vAccuracy of force control speed control:0.001% to 1% FS/s is better than ≤± 0.5%; When 1% to 5% FS/s, it is better than ≤± 0.2%;

V-force control maintains accuracy: ≤± 0.1％F.S；

vDeformation control speed range:0.001％～5％FS/s；

vDeformation control speed control accuracy:0.001% to 1% FS/s is better than ± 0.5%; Better than ± 0.2% at 1% to 5% FS/s;

vDeformation control maintains accuracy:≤±0.02％F.S；

vDisplacement control speed range:0.01～1000mm/min；

vDisplacement control speed control accuracy:≤±0.2％；

vDisplacement control maintains accuracy:≤±0.02mm；

Control methods: force closed-loop control, deformation closed-loop control, displacement closed-loop control

Host parameters:

vNumber of columns:6 columns (4 columns, 2 lead screws);

Maximum compression of vSpace（mm）：1000；

V maximumStretch spacing（Mm): 770 (including wedge-shaped stretching fixture);

Effective span（mm）：450；

vWorkbench size（mm）：800×425；

vOverall dimensions of the host（mm）：840*570*1850；