Selection guide of hydraulic universal testing machine and recommendation of HAW‑1000D equipment.

In metallurgical steel, building materials, military manufacturing and scientific research and testing in colleges and universities, the electro-hydraulic servo hydraulic universal testing machine is the core equipment for testing the mechanical properties of metal and nonmetal materials in tension, compression and bending. There are many types of market models, so we should not only look at the maximum test force when selecting models, but also consider comprehensively the test force level, measurement accuracy, host structure, measurement and control system, clamping reliability, operating noise and after-sales guarantee, so as to avoid the problems of inaccurate data and high equipment failure rate caused by improper selection.

# # 1. Key points of core selection of hydraulic universal testing machine

1. ** Determine the appropriate test force specification * *
According to the selection of the maximum destructive power of the tested material, it is suggested to reserve a safety margin of 1.21.5 times, pay attention to the effective force measuring range, and give priority to the wide-range measuring model to ensure the same accuracy of the small force value segment. For large tonnage detection, the * * four-column high-rigidity frame * * is preferred, which has strong anti-eccentric load capacity, small deformation of the whole machine during loading and ensures coaxiality.
2. ** Accuracy grade is preferred * *
For scientific research institutes, third-party testing and bidding projects, it is suggested to choose **0.5-level high-precision model * *, with an indication error of 0.5%, which meets the requirements of national measurement and verification; General factory quality inspection can choose class 1 model, and the accuracy level directly determines the reliability of test report data.
3. ** Host structure and clamping mode * *
The main engine under the oil cylinder has lower center of gravity, good impact resistance and convenient transportation and installation, which is the mainstream structure at present. The clamping mechanism directly affects whether the sample slips and whether the fracture is eccentric. The semi-open hydraulic automatic clamping structure is preferred, which is convenient for jaw disassembly and cleaning, and the clamping force increases synchronously with the test load to ensure that the sample does not slip.
4. ** Hydraulic oil source and operating environment * *
Focus on equipment operation noise, sealing performance and oil temperature control; The noise of ordinary equipment can reach 70‑75dB. In the laboratory scene, it is suggested to choose a low-noise servo pump model, and at the same time, it has automatic cooling protection of oil temperature to avoid excessive oil temperature in long-term continuous test, damage sealing elements and reduce oil leakage.
5. ** Compatibility between software measurement and control and standards * *
The software needs to be compatible with the current national and industrial test standards, support multi-mode closed-loop control of force, displacement and deformation, output test curves in real time, automatically calculate results and print reports, support free software upgrade in the later stage, and preferably have the ability of network data docking.
6. ** After-sales service and warranty * *
Confirm the warranty period, spare parts supply and response time of the whole machine, and give priority to the manufacturers that can provide quick door-to-door and life-long maintenance, so as to avoid the long maintenance period after equipment failure and affect the testing progress.

# # Second, HAW‑1000D electro-hydraulic servo universal testing machine equipment recommendation

Ji 'nan Liling HAW‑1000D(1000kN) electro-hydraulic servo universal testing machine, with four columns under the oil cylinder, is widely used in steel, construction, military industry, universities and scientific research units for the tensile, compressive and bending test design of metal and nonmetal materials, which fully meets the above requirements.

# # # Core hardware advantages

1. **0.5-level high-precision detection configuration * *
The maximum test force is 1000kN, the range of force measurement is 1% to 100% fs, the resolution of test force reaches 1/300000 of the full scale, and the relative errors of force value, displacement and deformation indication are all controlled within 0.5%. The * * spoke load sensor is adopted, which is different from the traditional oil pressure sensor, avoids the interference of force value caused by oil cylinder friction, and directly collects the real test force, so that the data is closer to the real sample. The coaxiality of the whole machine is 5%, which is far better than the national standard ≤12%, and the data deviation caused by eccentricity is eliminated.
2. ** High rigidity main machine, stable and reliable clamping * *
Four-column cast steel heat treatment main frame, alloy structural steel column, strong rigidity of the whole machine; Semi-open automatic hydraulic wedge jaw, dovetail groove positioning, clamping force increases synchronously with load, and the sample is firmly clamped without slipping; Jaw alloy steel is heat-treated HRC61, which is wear-resistant and durable, and it is convenient to disassemble and clean the oxide scale; Built-in clamping cylinder has no leakage, and its safety is better than that of external cylinder. The spherical bearing is automatically aligned to ensure the concentricity of tensile test.
3. ** Ultra-quiet servo oil source system, stable after long-term continuous test * *
The imported internal gear servo pump is adopted, and the running noise of the whole machine is less than ＜60dB, which is better than the national standard of 75dB, and the ultra-quiet operation is realized. Equipped with automatic air cooling device for oil temperature, which can automatically start heat dissipation when the oil temperature exceeds the limit, control the system temperature within 40℃, protect the seal and reduce the oil leakage failure rate; Full set of imported servo valves, seals, stainless steel high-pressure tubing, no leakage under high-pressure conditions; Integrated oil source control cabinet, neat layout, saving laboratory space and convenient handling and maintenance.

# # # Intelligent measurement and control software

Equipped with LJZTEST digital closed-loop measurement and control system, Windows platform is easy to operate. It can realize multi-mode control of constant rate loading, deformation, displacement and strain, and smoothly switch different control modes; Display the test curve in real time, automatically obtain the test results such as yield strength, tensile strength and elongation after breaking, and automatically generate and print the test report. Compatible with GB/T228.1‑2021 and other full sets of current national standards for material testing, customer-specific test methods can be customized as required, network data docking transmission is supported, and the software is upgraded free of charge for life.

# # # Standard Compliance and Perfect Configuration

The whole machine meets the national standards of GB/T2611, GB/T16826 and other complete testing machines. Complete sets of accessories, such as main engine, servo oil source, control cabinet, computer, printer, round/flat sample jaws, compression accessories, extensometer of steel research institute, etc., are standard, and the test can be carried out after arrival.

# # # After-sales guarantee

The whole machine is guaranteed for one year, providing lifelong maintenance; Spare parts are supplied all year round; Technical solutions are provided within 4 hours of equipment failure, and 24-hour door-to-door service is provided without spare parts to ensure uninterrupted customer testing.

# # III. Summary of applicable scenarios

HAW‑1000D 1000kN electro-hydraulic servo universal testing machine, with high precision, stable operation, low noise and reliable clamping, is suitable for quality inspection laboratories, scientific research institutes, universities and industrial and mining enterprises that need to detect large samples such as steel bars, profiles and high-strength metals. If you have other tonnage and special sample tooling requirements, you can also contact Jinan Liling for customized scheme design.