1.Introduction:

Domestic microcomputer controlled electronic universal testing machine started in the early 1990s. Our company is one of the enterprises that absorb foreign leading technology and develop electronic universal testing machine. In order to improve the technical level of enterprise products, the company has successively absorbed advanced technologies at home and abroad, which has made the product technical level of the company leap to a new level.

2.Scheme Description:

2.1 host:

The testing machine uses AC servo motor as the power source; With advanced chip integration technology and professionally designed PCI data acquisition, amplification and control system, the test force, deformation amplification and a/d conversion process have achieved full digital adjustment. This machine can test and analyze the mechanical properties of various metal, non-metal and composite materials, and is widely used in aerospace, petrochemical, machinery manufacturing, wire, cable, textile, fiber, plastic, rubber, ceramics, food, pharmaceutical packaging, aluminum plastic pipe, plastic door and window, geotextile, film, wood, paper, metal materials and manufacturing industry. According to GBJIS, ASTM, DIN, ISO and other standards automatically calculate the maximum test force value, breaking force value, yield strength, upper and lower yield strength, tensile strength, compressive strength, fracture elongation, tensile modulus of elasticity, flexural modulus of elasticity and other test data.

According to the standard:

Gb/t 2611 general technical requirements for testing machines

Gb/t 16491 electronic universal testing machine

Meet the requirements of national standards, and comply with the data processing of GB, ISO, ASTM, DIN and other standards. It can meet the requirements of users and the standards provided.

2.1.1 the main machine is mainly composed of base, beam and column. The upper, middle and lower three beams form a double space. The middle beam can realize stepless lifting and lowering, and tension and compression attachments can be installed at the same time, which is conducive to reducing the trouble of attachment disassembly. The column connects the beam into a portal structure, which has high strength and good rigidity to ensure the accuracy and safety of the test.           

2.1.2 AC servo motor is selected as the motor: it can achieve the fastest response frequency of 2.0khz in the industry and fast response speed; The beam moves smoothly and stops without vibration, effectively shortening the high-precision positioning time, low noise in operation, equipped with the latest controller, the controllable speed can achieve the highest level of stable speed in the industry; The protection grade meets the tp67 standard, and the environmental adaptability is stronger.

2.1.3 deceleration system: adopt synchronous belt to drive and decelerate, with low noise, stable operation and high speed control accuracy. The company is equipped with a special CNC gear hobbing machine, which effectively ensures the accuracy and roughness of the synchronous belt pulley teeth, and the reduction ratio and the tensioning mode of the synchronous belt are accurately calculated and reasonably designed to ensure the stable operation of the beam and the long-term good operation of the synchronous belt.

2.1.4 sensor: a high-performance sensor specially developed for the testing machine industry, with high precision and long service life. The exterior is made of stainless steel, with good waterproof performance, and the protection grade can reach IP67.

2.1.5 transmission system: the precision double nut pre tightening grinding lead screw with up to 72 processes is selected. The pre tightening force is accurately controlled to eliminate the transmission gap, the grinding ensures the accuracy, the heat treatment process ensures the hardness of the raceway, and the lead screw has stable transmission, low noise, long service life and lifelong maintenance free.

2.1.6 appearance: the main engine cover is made of aluminum alloy material by one-time extrusion, with high hardness, good rigidity, no deformation, and the surface is frosted, which is beautiful and durable as a whole.

2.2 control system:

2.2.1 this machine adopts a built-in controller, which ensures that the testing machine can realize the closed-loop control of constant velocity displacement and constant velocity test force.

2.2.2 AC servo motor is adopted, which has stable and reliable performance, and has overcurrent, overvoltage, overspeed, overload and other protection devices. The speed regulation ratio can reach 1:10000.

2.2.3 the electrical control circuit refers to international standards, meets the electrical standards of national testing machine, and has strong anti-interference ability, ensuring the stability of the controller and the accuracy of experimental data.

2.2.4 automatic shift: automatically switch to the appropriate range according to the load to ensure the accuracy of the measured data; It realizes the real physical zero adjustment, gain adjustment and automatic shift, zero adjustment, calibration and storage of test force measurement, without any analog adjustment links, and the control circuit is highly integrated

2.2.5 condition storage: the test control data and sample conditions can be made into modules to facilitate the batch test;

2.2.6 automatic transmission: the speed of moving the beam during the test can be changed automatically or manually according to the preset procedure;

2.2.7 automatic calibration: the system can automatically calibrate the accuracy of indication;

2.2.8 automatic saving: after the test, the test data and curves are automatically saved;

2.2.9 process realization: the test process, measurement, display and analysis are all completed by microcomputer;

2.2.10 batch test: for samples with the same parameters, it can be completed successively after one setting;

2.3 software:

The measurement and control software is used for the microcomputer controlled electronic universal testing machine to carry out the tests of various metals and non metals (such as wood-based panels), and complete various functions such as real-time measurement and display, real-time control and data processing, result output and report printing according to the corresponding standards.

2.3.1 test software: Chinese Windows interface, menu prompt, mouse operation;

2.3.2 display mode: data and curve are dynamically displayed with the test process;

2.3.3 curve traversal: after the test is completed, the curve can be re analyzed, and the test data corresponding to any point of the curve can be found with the mouse;

2.3.4 curve selection: stress-strain, force displacement, force time, displacement time and other curves can be selected according to needs for display and printing;

2.3.5 test report: the report can be prepared and printed according to the format required by the user; It has a network interface, which can transmit, store, print records and network transmission and print data, and can be connected with the internal LAN or internet network of the enterprise.2.3.6 limit protection: it has two-level limit protection of program control and machinery;

2.3.7 automatic shutdown: after the sample is broken, the moving beam will stop automatically;

2.3.8 overload protection: when the load exceeds 3-5% of the maximum value of each gear, it will stop automatically;

2.3.9The test software has a built-in standard network interface, through which the test data can be transmitted to the network. The interface is described in detail in the software specification and help documents, and the network software can exchange and transmit data with the test software through this interface. We assist users in networking, but we do not customize network interfaces for users alone, nor do we assume the responsibility of negotiation and coordination with relevant network companies.

The test results are obtained automatically and manually, and the report forms are automatically formed, which makes the data analysis process simple.

3、 Main technical performance indicators:

1. Maximum test force:     50kN；

2. Testing machine accuracy level 1

3. The test force is not graded, and the measurement range is:  2%-100%FS；

4. Accuracy of test force measurement: ≤± 1%;

5. The repeatability error of test force measurement is ≤± 1%;

6. Displacement speed control range:   0.01～500mm/min;

7. Displacement measurement accuracy: ≤± 1%;

8. Tensile testing space:    0～600mm；

9. Compression test space:    0～600mm；

10. Maximum travel of crossbeam: 1150mm

11. Test space width:    400mm；

12. Power supply power:    0.75KW，220V，60Hz

13. Machine size and weight: approximately 780 * 590 * 1900 (mm), approximately 550KG

4、 System configuration list: