WAW-600C Hydraulic Universal Machine

1. Product introduction

WAW-D microcomputer controlled electro-hydraulic servo universal testing machine is Ji 'nan Kehui Company in the original B machine on the basis of the upgrade and improvement of the mid-end model, learn the B-machine long-term production experience and customer feedback experience, so that its performance and stability have been significantly improved, reduce the failure rate. In the late market research also fully highlighted the cost performance advantage of the D-type machine, which is favored by mid-end customers.

This testing machine is an important instrument and equipment for testing the physical properties, mechanical properties, process properties, structural seismic strength and internal and external defects of materials and components of various materials and products in various environments and simulated states. The tensile strength, yield strength, non-proportional extension strength, elastic modulus and other performance indicators of the measured material can be obtained according to the corresponding standards, and closed-loop control such as equal rate loading, equal rate deformation, equal rate displacement and equal rate strain can be realized. The process qualification test of materials or products can be carried out.

2. Specification model: WA-600C

Complete machine diagram

3. Applicable standard

GB/T 2611-2007 "General Technical Requirements for Testing machine"

JB/T 7406.1-1994 Testing Machine Terminology Material Testing Machine

GB/T 16826-2008 "Electro-hydraulic servo universal Testing Machine"

GB/T 16825.1-2008 "Testing of static uniaxial testing machines - Part 1: Testing and calibration of force measurement systems for tension and/or pressure testing machines"

GB/T 22066-2008 "Evaluation of Computer Data acquisition System for Static Uniaxial Testing Machine"

JJG 139-1999 "Tensile, Pressure and universal Material Testing Machine"

JB/T 6146-2007 "Extensometer Technical Conditions"

JB/T 6147-2007 "Testing machine packaging, packaging marks, storage and transportation technical requirements"

GB/T 228-2010 "Tensile test method for Metal Materials"

GB/T 7314-2005 "Metal material compression test method at room temperature"

GB/T 232-2010 "Bending test Method for Metal Materials"

4. Product features

1) The main machine adopts streamlined appearance design, the oil cylinder is placed under, the design strength distribution of each component is reasonable, the overall combination is scientific, atmospheric, beautiful, independent painting process, and the painting effect and color can be customized according to customer needs to match the customer site environment;

2) The coaxiality between the center line of the upper and lower chuck and the tensile axis of the testing machine is 8% (much better than the national standard of less than 15%);

3) The clamping of the sample is hydraulically driven. The upper and lower beams are equipped with internal clamping small oil cylinders, which are safer, more reliable, longer life, no oil seepage and beautiful appearance than external clamping cylinders.

4) The clamping force of the sample increases with the increase of the test force, and the sample is firmly held;

5) The hydraulic system adopts servo closed-loop control, equipped with highly responsive imported servo valve, which can realize automatic and accurate control;

6) The hydraulic system design fully considers energy saving, reliability, safety and environmental protection. The pressure differential throttle speed servo system is adopted, and the working pressure of the system is automatically adjusted with the change of the load, which reduces the heating of the system and saves energy. All components are made of components that meet environmental protection requirements;

7) High pressure gear pump and motor directly connected structure, compact structure, smooth operation, noise below 70dB;

8) The accuracy of the test process and parameters can be ensured by not being affected by external forces in the test after random calibration. Tensile and compression test sensors have the same force direction. Simple and convenient calibration;

9) Use high-quality high-pressure hoses and joint bodies to ensure that no leakage occurs;

10) Equipped with high-performance intelligent full digital controller, full digital PID regulation, equipped with independent servo amplifier, measurement and control software and data acquisition and processing software, can realize a variety of closed-loop control modes such as equal rate test force, equal rate cylinder displacement, equal rate strain, and can realize smooth switching of different control modes;

11) The measurement and control system is equipped with multi-function test software package and adopts VXDs high-speed data acquisition technology to realize high-speed acquisition of multi-channel data; It can analyze and process the test results according to the requirements of different test methods, with human-computer interactive programming control function, convenient to add new test standards; It has a powerful graphic operation function, which can display the test curve and display the test data in real time, and has the function of curve scaling, graph magnification, interception, and cursor following display. With a complete test curve, test data storage function; With single test report output and batch test report output printing function;

12) With network interface, can achieve data networking and remote control functions;

13) Safety protection device: with test force overload, oversetting, power off, piston to the limit position and other protection functions.

5. Product structure and performance:

The testing machine is composed of four parts: main engine part, oil source part, measurement and control system and test accessory.

(1) Testing machine host

Main engine diagram (forward side)

Host structure:

The main machine is a four-column frame type double space structure with double columns and double screw. There is a stretching space between the upper beam and the lower beam, and a compression space between the lower beam and the workbench.

The main body is composed of a base, an oil cylinder, a workbench, a lower cross member (lower jaw seat), an upper cross member (upper jaw seat), a lead screw, a column and other main components. The cylinder and lead screw are installed on the base of the machine, and the piston is directly connected with the workbench, which is tightly connected with the upper beam through two columns. The moving beam can move up and down between the workbench and the upper beam along the lead screw to adjust the stretching and compression space. The moving beam up and down is realized by the motor reducer installed on the base to drive the lead screw to rotate.

During the test, the sample is placed in the tensile clamp mouth between the upper and lower beams, and the hydraulic oil is smoothly sent from the lower part of the cylinder to the pressurizing chamber by the high-pressure oil pump through the oil filter device and the precision servo valve, which drives the piston to rise and drives the workbench, the column and the upper beam to move upward together, and the sample is stretched. According to the different length of the sample, it can be adjusted to the appropriate position by moving the lower beam up and down. The compression test is carried out in a compressed space composed of a table and a moving beam. The bottom end of the lower beam is equipped with an upper pressure plate, and the lower pressure plate with a spherical pair is assembled on the test bench. The same movement of the oil cylinder can complete the compression test between the workbench and the lower beam. The space can also be used for specimen bending and shearing tests after the replacement of bending and shearing fixtures.

After the test, the piston automatically returns to the position under the action of gravity such as beam, workbench, column and piston.

(2) Test the oil source

Integrated oil source control cabinet:

The microcomputer table type integrated oil source control cabinet is composed of cabinet body, oil tank, high pressure silent pump station, precision oil filter device, electro-hydraulic servo control valve group, electrical system, etc. The internal independent area integrates the electronic control system, the isolated area places the microcomputer host, and the oil source counter surface can double as the microcomputer and printer workbench. The overall structure is compact, highly integrated, orderly layout, beautiful shape. Easy to operate, maintain and carry.

Hydraulic power source:

The hydraulic power source provides hydraulic power to the main drive cylinder and the clamping cylinder of the master machine. Adopt mature technology according to the standard modular unit design and production, specially for the electro-hydraulic servo universal testing machine supporting use. It is composed of oil pump electric unit, oil tank device, filter device, flow control valve group, direction adjustment device, pressure adjustment device, pressure safety device, etc. The suction and high pressure systems are equipped with filter devices, and the outlet pressure is respectively controlled by electro-hydraulic servo valve, electromagnetic relief valve and manual relief valve.

The hydraulic system is a load-adapted inlet throttle speed regulating system. In order to reduce system heating and save energy, the main loading cylinder adopts differential pressure valve and servo valve to form servo servo system to control the flow rate. During the test, the size of the opening of the electro-hydraulic servo valve directly controls the speed of piston movement, so as to realize the adjustment of the test speed. The role of the differential pressure valve is to constantly adjust the system pressure according to the needs of the test force. This method of using differential pressure valve and servo valve combined system control is called load adaptive control, this control method is that when the pressure of the hydraulic system increases and decreases, the system setting pressure changes accordingly, keeping pace with the change of the test force, not only reducing energy consumption, reducing heat, but also improving the safety and reliability of the entire hydraulic system.

Hydraulic schematic diagram

(3) Testing machine measurement and control system

System composition:

It is composed of high precision hydraulic sensor, high precision electronic extensometer, cable encoder, servo power source, special independent controller and measurement and control software, and Lenovo microcomputer.

Control software:

The controller and software were developed specifically for material testing machines. The software is compatible with Windows98 to the latest Windows operating system, and constantly follows the Windows system upgrade. Manage test data using a standard database, integrate more than 300 national and industry test standards, and support batch testing. It can complete the real-time control, detection, data processing, result display, curve drawing, print-out, remote transmission of test force, sample deformation, displacement and other parameters.

1) Measurement and control system:

It is composed of electro-hydraulic servo oil source, full digital PC servo controller, electro-hydraulic servo valve, pressure sensor, extensometer for measuring specimen deformation, photoelectric encoder for measuring displacement, PC control card for testing machine, printer, multifunctional test package, electrical control unit, etc.

2) Standard electro-hydraulic servo oil source:

A. Suitable for the load of fuel inlet throttle speed regulation system, the use of mature technology according to the standard modular unit design and production, specially for the use of electro-hydraulic servo universal testing machine;

b, the selection of mature technology oil pump - motor, reliable quality, stable performance;

c, the use of unique technology developed and produced by the load adaptive throttle speed control valve, the system pressure is stable, adaptive constant pressure difference flow regulation, no overflow energy consumption, easy to PID closed-loop control;

d, pipeline system: pipelines, joints and their seals are selected with stable performance of the group kit, to ensure that the hydraulic system seal reliable, no leakage of oil failure;

3) Electrical control cabinet:

a. All the strong current components of the system are concentrated in the strong current control cabinet to realize the effective separation of the strong current unit and the weak current measurement and control unit to ensure that the measurement and control system is not interfered with and works stably for a long time;

b. Manual operation button is set on the electric control cabinet, including power switch, emergency stop and oil source pump start and stop, etc.

4) Full digital PC servo control system:

a) The system is based on PC computer, full digital PID regulation, and equipped with PC plate servo amplifier, measurement and control software and data acquisition and processing software, which can realize closed-loop control of test force, sample deformation and piston displacement and smooth switching of control modes;

b) The system consists of three signal conditioning units (test force unit, cylinder piston displacement unit, specimen deformation unit), control signal generator unit, servo valve drive unit, servo oil source control unit, necessary I/O interface, software system, etc.

c) Closed-loop control loop of the system: the measurement sensor (pressure sensor, displacement sensor, deformation extender), servo valve, controller (each signal conditioning unit) and servo amplifier together form a number of closed-loop control loops to realize the closed-loop control function of the test force of the testing machine, the displacement of the cylinder piston and the deformation of the sample; It has a variety of control modes, such as equal rate test force, equal rate cylinder displacement and equal rate strain, and can realize smooth switching of control modes, so that the system has greater flexibility.

5) PC card type servo amplifier for testing machine:

a, for the pluggable PC card board, the application of advanced computer bus control technology designed for the testing machine, programmable analog amplifier, A/D conversion, digital acquisition channel, digital I/O, etc.;

b, the special measurement and control card and PC unit into a single card measurement and control system, can be directly connected with the sensor, measurement and control and data acquisition, so that the complex measurement and control and data acquisition system becomes simple and reliable;

c, the use of computer bus technology, directly inserted into the computer expansion slot, all digital circuit, zero adjustment, gain adjustment, etc. are realized by software, is the latest product unit of testing machine measurement and control technology development;

d, gain programmable cascade amplifier, can get different gain magnification;

e, the sensor bridge power supply and the reference voltage of A/D chip share the same voltage, the whole measurement system attenuates year-on-year, and realizes the hardware compensation technology of the bridge power supply;

f, through multi-bit A/D conversion to meet the sensitivity and resolution requirements of the system, to avoid the software frequency doubling method to reduce the characteristics of the system;

6) Multifunctional test package:

a, operating system Windows98 and above platform, all Chinese operation interface;

B. The computer screen displays test force, cylinder displacement, loading rate, deformation test data, and draws a variety of test curves such as time-test force/deformation, deformation-test force, etc. Automatic data processing, data processing methods meet the requirements of GB228-2010 standard, such as upper and lower yield points, maximum force points, all kinds of specified non-proportional stress points, all kinds of specified full elongation stress points, etc. At the same time meet the testing machine pressure test requirements;

C. The software also provides data analysis function to meet the test personnel for test analysis and special test data processing.

d, with strong graphic operation functions, such as dynamic test curve and digital display function, graphic magnification, interception function, cursor following display function;

e, the use of VXDs high-speed data acquisition technology to achieve multi-channel (up to 16 channels) high-speed data acquisition;

f, the system has a complete file operation function for the test curve, test data storage; At the same time, the test data can be stored in the form of ASCII code, so as to facilitate the user to carry out secondary data processing;

7) The control system has protection functions such as overload, oversetting, power off, piston reaching the limit position, etc.

8) Query and search test data management through test data files;

Customize the content and format of the test report through the report template;

By editing formulas and result items, most test standards and test methods can be supported.

After loading one or more test data files, the test report is generated according to the report template and can be printed out.

6. Product standard technical parameters:

(1) Host parameters:

(2) Measurement parameters:

(3) Attached parameters:

(4) Machine parameters:

7. Product components and configuration:

(1) Standard host part

Hydraulic universal testing machine host: 1

Hydraulic universal testing machine standard oil source: :1 set

Electro-hydraulic servo full digital PC controller: 1

Testing machine special PC control card: 1 piece

Desktop business computer: 1 (Lenovo brand business jet)

Printer: 1 (A4 inkjet printer)

Electro-hydraulic servo valve: 1

Electrical control box (integrated with oil source) :1 set

Displacement sensor: 1 (Changchun light - Kaien)

Hydraulic sensor: 1 piece (Taiqin, 30MPa)

Range extension meter: 1 piece (Beijing Iron and Steel Research Institute)

(2) Standard configuration test equipment (the items shown in the diagram shall prevail)

Hydraulic clamping device: 2 sets (upper and lower beam built-in 1 set);

Clamp card board: 1 pair (4 pieces in total);

V-shaped round jaws: 2 pairs (φ13~ 26mm, φ26~ 40mm, a total of 8 pieces);

Plate jaw: 1 pair, (0~15mm,15-30, a total of 8 pieces);

Compression accessories: 1 set (φ160), lower pressure plate with adjustable spherical pair;

Bending accessories (optional) : 1 set (three-point bending, including bending support, support roll, tension connecting rod, press roll);

(3) Spare parts

Gasket: O-ring 10 pieces;

Gasket: combined gasket 10 pieces;

Dust cushion: 2 pieces (to prevent the sample residue from falling down the sliding plate pores);

(4) Random data

Packing list: 1 copy;

Warranty certificate: 1 copy;

Factory verification certificate: 1 copy;

Testing machine manual: 1 copy;

Software manual: 1 copy;

Software backup CD: 1;

Computer and printer original random data: 1 set;

Sensor, extensometer, motor, oil pump, reducer and other original random data.