WDW-20E type electronic universal testing machine is the classic practical model developed by our company, and it is also the mainstream model produced at present. It is the new generation of electronic universal testing machine with leading technology in the industry, which is designed and developed by our company after two brand-new upgrades on the basis of the previous generations of models, with the structure of the mainframe and the measurement and control system upgraded substantially, the structure is more reasonable and the function is more perfect. This series of testing machine has been accumulated production of more than 1,000 units, after a lot of practical testing and continuous improvement and refinement, technology and process maturity, high reliability, low failure rate, by the market and the user's praise and welcome.
The machine can carry out tensile, compression, bending, rebound, peeling, indentation hardness, shear, puncture and other physical and mechanical tests; GB, DIN, ISO, JIS, ASTM and other national standards and foreign standards can be tested and provide data; can be automatically obtained from the maximum test force, rupture force, compression force, yield HRb, tensile strength, bending strength, elasticity, modulus of elongation, and other parameters.
The machine conforms to GB/T2611 "General Technical Requirements for Testing Machines" and JJG475-2008 "Electronic Universal Testing Machine".

Overview:The tester adopts digital AC servo speed control system and servo motor with high speed control accuracy and stable performance as the driving system, and the specially designed synchronized tooth belt deceleration system and ball screw drive the moving beam movement of the tester. The control and data processing software based on database technology with Windows as the operation platform realizes the screen display of test force, peak test force, beam displacement, specimen deformation and test curve, and all the test operations can be completed by mouse input on the computer screen, which has a good human-computer interface and is easy to operate. The full digital programmable amplifier realizes the real sense of physical zeroing, gain adjustment and automatic shift, zeroing and calibration of the test force measurement without any analog adjustment, highly integrated control circuit, completely eliminating the potentiometer and other mechanical adjustment devices, simple structure and reliable performance. Ensure that the machine can realize the closed-loop control of test force, specimen deformation and beam displacement and other parameters, and can realize the test of constant force, constant displacement, constant strain, equal-rate load cycle, equal-rate deformation cycle and so on. Users can use the PC expert system to independently set the control modes of constant stress, constant strain, constant displacement, etc., and the various control modes can be switched smoothly and without disturbance. It can realize data processing in accordance with various standards such as GB, ISO, JIS, ASTM, DIN, etc. In particular, it has good expandability, and the processing results can be stored on disk in the form of ASCII code, which is convenient for the reanalysis of test data, database management, network transmission and other post-processing.

Mechanical structure part:

This testing machine consists of four parts: the mainframe part, power system, measurement and control system, and test accessories.

(I) Main machine structure:
The main machine consists of the upper crossbeam, moving crossbeam and working table connected into a rigid floor-standing frame structure through columns and ball screws. Between the upper beam and the moving beam, there are tensile attachments installed, which can be used for tensile and tearing tests on metallic or non-metallic material specimens; between the moving beam and the working table, there are compression and bending attachments installed, which can be used for compression and bending tests on metallic or non-metallic material specimens.
Thick ball screws and columns, thickened crossbeam and working table ensure high rigidity and durability of the frame. Fully meet the test of high-strength materials, such as aerospace composite materials, metal alloy test is particularly effective.
Precise overall CNC machining ensures excellent alignment, together with the stable and accurate rigid guide column system, ensures that the specimen is minimized by the lateral force under load.

(ii) Power system:

Servo motor diagram

Servo Motor Driver Diagram

The drive and deceleration system is integrated and mounted under the table, which is compact and simple.
The tester adopts digital AC servo speed control system and servo motor with high precision and stable performance as the driving system, and the speed control system is composed of Taiwan Liming reducer and synchronous toothed belt deceleration mechanism.
The AC servo motor drives the double ball screws through the speed reducer and the synchronized toothed belt deceleration system, thus driving the moving beam to move up and down to realize the loading of the specimen.
The specially designed deceleration mechanism, symmetrical drive, more stable transmission, to ensure the synchronous movement of the screw, beam loading balance, and help the system alignment.

Measurement and control systems:
It consists of high-precision load sensor, high-precision extensometer, displacement measurement system, servo motor, special independent controller, special measurement and control software, and Lenovo mainstream brand microcomputer to form the measurement operation and automatic control system.
The force load sensor is installed in the lower part of the moving beam, which is used to measure the size of the test force.
The controller and software are specially developed and designed for material testing machine. The software is compatible with Windows98/2000/XP/Win10 operating systems. It adopts standard database to manage test data, integrates more than 200 national and industrial test standards, and supports batch test. Can complete the test force, specimen deformation, displacement and other parameters of real-time control, detection, data processing, results display, curve drawing, printout, remote transmission.

Controller Main Board Diagram

1. Controller main features:
The test machine will develop in the direction of high performance, humanization-intelligent,network,automation, integration-cost-effective. Independent controller set measurement and control functions in one, can complete a variety of test operations, provides a test machine measurement and control and data processing of a new solution, is to lead the development of test machine technology is an important part.
The controller is a new generation of static test machine special controller developed by our company for many years and cooperated with universities. Controller will be a powerful measurement and control functions, data processing functions, human-computer interaction functions, network functions, peripheral functions integrated together to provide a highly integrated single system solution for the test machine. High performance and cost-effective.
With network interface, it can realize data networking and remote control function.
Comprehensively support GB/T 228-2010 metal tensile test standards and all kinds of non-metal tensile test standards.

Specialized measurement and control software:

1· Equipment management functions:There are equipment parameter setting, equipment online or offline management, controller parameter setting, PID parameter online or offline adjustment, sensor direction identification, sensor calibration, sensor calibration, switching and other functions.
2. Test program: (1) fast tensile control mode in line with GB/T228-2010; (2) edited test program can be imported to other test machines; (3) by editing the running program, it can realize force control, displacement control, deformation control and other control modes combined operation, so as to meet the needs of any static test operation. Test parameters can be set, such as running parameter setting, sample parameter setting, running condition setting, test result project management. Test operation management can be carried out, such as starting test operation, test operation process management, test status management and display value management.
4. Equipment data management: query, delete and save test data; continue the unfinished batch test.
5. Unit parameter: various units can be added as required.
6. Curve management and analysis:
    During test operation, the test process is displayed in real time through single or multiple curves;
    In the non-test running state, single or multiple test curves are displayed by querying.
7. Automatic storage of test data: test data are automatically stored to avoid loss of test data due to unexpected downtime.
8. Test data query function: according to the test time, test program and other conditions to quickly query the previously completed test data and results.。

1、Main machine (door type)                1 set
1.1 AC servo motor                         1 set
1.2 AC servo governor                      1 set
1.3 Load cell 20kN                         1 set
1.4 Precision ball screws (Taiwan ABBA)    2 sets
2、Full digital control system              1 set
3、Tension fixture: (pneumatic fixture)       1 set
4、Compression fixture: Ø100 pressure plate       1 set
5、Optical encoder           1 set
6、Lenovo brand computer        1 set
7, based on the Windows operating system professional version of the computer control software       1 set
8, random tools (provide installation, maintenance, operation of the special tools required and the list)       1 set
9, technical information: including: instruction manual, software manual, certificate of conformity, packing list

Ⅵ.Quality assurance