Project Description

Servo Hydraulic Universal Testing Machine

servo hydraulic universal testing machine
  • AT-U2-WAW series
  • Capacity: 100 kN, 300 kN, 600 kN, 1000 kN or customized
  • Control mode: Closed-loop
  • Automatic Loading
  • Computer + Special Software
  • Suitable for Tensile & Compression Testing

Manual Hydraulic Universal Testing Machine

hand-operated hydraulic universal test machine
  • AT-U2-WE series
  • Capacity: 100 kN, 300 kN, 600 kN, 1000 kN or customized
  • Control mode: Open-loop
  • Manual Loading
  • Microprocessor + Digital Display
  • Suitable for Tensile & Compression Testing

Servo Hydraulic Universal Testing Machine

Servo Hydraulic Universal Testing Machines is a material testing machine using computer fully automatic closed-loop control. It is mainly used for the tensile, compression, flexural, shear, and other mechanical performance tests of metal materials. After the corresponding attachments are added, they can also be applied to tests on concrete, bricks, tiles, and other materials.

The servo-hydraulic testing machine is suitable for steel metallurgy, building materials, aerospace, and other industries for quality inspection, material research and development, teaching, and scientific research. It complies with the requirements of ISO, ASTM, GB, DIN, and other standards.

servo hydraulic testing machine

The Servo Hydraulic universal testing machine has a closed-loop servo control system composed of a controller, a servo valve, a force sensor, a displacement sensor, an extensometer, and a computer. It is able to automatically and accurately control the test process and set up the test parameters to achieve three-stage control of force, displacement, and deformation during the test. This hydraulic universal testing machine allows for constant velocity stress, constant velocity strain, constant velocity displacement, displacement retention, and test force retention.

Each set of the hydraulic universal testing machine is equipped with unique measurement and control software to assist in completing the operation and control required for various tests. The computer displays various data and required test curves in real time and automatically calculates and analyzes test results to obtain specific values. The test report and test curve can be saved and editable.

WAW Series Servo Hydraulic Universal Testing Machines have various measuring capacities, including 100 kN, 300 kN, 600 kN, 1000 kN, and more for you to choose from. They are equipped with a high-precision force transducer, displacement transducer, and extensometer. The load force is not divided in the whole process, and the effective range is 2% ~ 100 FS. The force resolution is 1/300000, and the test force measurement accuracy is better than ± 1 % of the indicated value. The displacement resolution is 0.01 mm, and the measuring range is 0 ~ 250 mm. The displacement accuracy is better than ± 1 % of the indication. The gauge length of the standard electronic extensometer is 50 mm, and the deformation measurement range is 0 ~ 15 mm. The deformation measurement accuracy is better than 0.5 % of the indicated value.

  • The four-column structure guarantees sufficient strength to bear test loads within various capacities.

  • Various materials such as steel bars and concrete can be tested in tension, compression, bending, shearing according to relevant standards.

  • The test results are highly accurate and repeatable.

  • Hydraulic universal testing machines with different capacities, including 100 kN, 300 kN, 600 kN, 1000 kN, etc., can be provided to meet diverse testing needs.

  • Equipped with high-quality oil pump, servo valve, and professional test software to realize multi-channel closed-loop control (automatic control of test force, displacement, and deformation).

  • It integrates data acquisition, automatic measurement, automatic control, graphic display, and test result processing.

  • Support custom various test parameters.

  • The program supports hierarchical user management authority (two levels: administrator and operator).

  • The computer screen displays the test curve and test results in real time.

  • Test reports and test curves can be printed out.

  • The test results are presented in an open EXCEL report format, supporting user-defined report formats.

  • The machine has overload and limits protection functions.

  • A separate electric motor drive device is used to rapidly adjust test space when mounting the specimen.

  • Fitted with a hand-held remote control for quick operation on specimen mounting.

  • A pair of tensile test clamps, compression test attachments, flexural test fixtures, and an electronic extensometer are configured for the machine.

The oil in the oil tank is driven by the oil pump motor into the hydraulic oil circuit, flows through the high-pressure oil filter, the differential pressure valve group, and the servo valve, and then enters the working oil cylinder. The computer software sends a control signal to the servo valve to control the opening of the valve and the direction of the oil flow to control the actual flow into the working cylinder to adjust the loading speed and state of the fixture to the sample, and realize the control of the constant velocity test force, constant velocity displacement. The strain measurement is executed by a built-in displacement measuring device or an external extensometer.

Model AT-U2-WAW series
Capacity 100 kN / 300 kN / 600 kN / 1000 kN or customized
Effective Measuring Range of Load 2 ~ 100 % F.S
Load Resolution 1/300000
Load Accuracy Better than 1 % the indicated value
Measuring Range of Displacement 0 ~ 250 mm
Displacement Resolution 0.01 mm
Displacement Accuracy Better than 1 % the indicated value
Gauge Length of Extensometer 50 mm
Effective Measuring Range of Deformation 2 ~ 100 % F.S
Deformation Resolution 1/300000
Deformation Accuracy Better than 0.5 % the indicated value
Piston Stroke 250 mm
Computer Based on Windows Operating System
Control Mode Three closed-loop control (constant stress, constant strain and constant deformation)
Test Speed Up to 70 mm / min
Electrically Adjusted Speed of Crossbeam Up to 120 mm / min
Max Vertical Test Space Between Tensile Grips 650 mm
Max Vertical Test Space Between Compression Platens 550 mm
Front Column Spacing 540 mm
Widget Grips for Tensile Test For Round specimens from Φ6mm~Φ40mm
For flat specimens from 0 ~ 30 mm in thickness, 75 mm in width
Platens for Compression Test Φ160 mm (Square platens are optional)
Attachments for Flexural Test Roller spacing: 30 ~ 600 mm

Width: 140 mm

Roller diameter: 30 mm

Power Supply AC 380 V / 50 Hz / 3-phase

Load Frame

The load frame is mainly composed of a workbench, columns, a fixed crossbeam, a movable crossbeam, lead screws, fixtures, a working cylinder, a piston, and so on.

General Structure

Our servo hydraulic machines feature a four-column structure (two lead screws are not included). The columns made of precision steel are connected by a fixed crossbeam at the top to ensure sufficient strength as required. The testing area adopts a dual-space structure, and the working cylinder is located at the bottom of the frame. The tensile space of conducting the tension and shearing tests is between the upper crossbeam and the middle movable crossbeam. The space for the compression and bending is between the workbench and the middle movable crossbeam.

Both the tensile and compression spaces can be automatically adjusted by the rotation of the lead screws driving the middle crossbeam to move up and down. Thanks to this design, the operator can easily and quickly switch between the two completely different test types in tension and compression during testing, avoiding extra time and labor to replace bulky fixtures and improving the test efficiency.

The working oil cylinder and piston are located at the bottom of the frame. The pressure oil is sealed by the oil film between the cylinder and the piston and guided by the inner surface of the cylinder. A complete set of the cylinder drive mechanism is available to realize the rotation of the lead screw. The screw can rotate in both directions to drive the crossbeam to move up and down.

The adjustment of the size of the test space (the distance between the fixtures) before the test is driven by a built-in electric motor in the base instead of hydraulically. This motor is controlled by special adjustment buttons on the control cabinet or the remote control hand set. It is only used to quickly adjust the up and down positions of the moving crossbeam when it is unloaded and will not exert any force on the specimen during the test.

Fixtures & Attachments

We will configure three different fixtures or accessories for the hydraulic testing machine for the tensile, compression, and flexural tests.

Hydraulic Wedge Fixtures of servo hydraulic testing machine

Hydraulic Wedge Fixtures

compression platen of servo hydraulic testing machine

Compression Platens

3 point flexural test fixture of servo hydraulic testing machine

3-point Flexural Test Fixtures

Hydraulic Wedge Fixtures

This hydraulic universal testing machine comes with a pair of hydraulic wedge fixtures. They are capable of clamping the sample automatically by hydraulic. Each gripping device contains two different types of jaws to accept round samples from 6 to 40 mm in diameter, and flat samples from 0 to 30 mm in thickness and up to 75 mm in width (depending on the machine’s capacity).

Platens for the Compression Test

This hydraulic testing equipment is fitted with two platens made of rugged metal for compressive testing. The diameter of both is 160 mm. One is mounted to the middle of the bottom of the movable crossbeam. The other one is attached to the workbench.

Fixtures for the 3-point Flexural Test

A set of unique fixtures consisting of 2 parts are available for the flexural test. The compression space below the crossbeam is needed to do this test. The strip sample is placed horizontally on two rollers of the lower fixture fixed to the workbench. The width of these two rollers is 140 mm, and their spacing is adjustable between 30 and 600 mm.

During the test, along with the downward movement of the movable crossbeam, the roller of the upper fixture fastened to the crossbeam’s bottom was required to touch the middle of the two rollers on the workbench and continuously load onto the specimen. The diameter of the three rollers on the fixtures is 30 mm.

Control Unit

The WAW series hydraulic tensile testing machines are equipped with the Servo valve and PID control, ensuring all tests are under load and displacement controls. According to the feedback signal, the control system will automatically control the amount and speed of oil supplied to the working cylinder.

After the test is completed, the test results such as the maximum force, tensile strength, yield strength, elastic modulus, and elongation after fracture of the material are automatically obtained. Unlike the manual hydraulic universal testing machine requiring you to manually adjust the oil supply to the working cylinder during the test to control the load, for this servo-hydraulic universal testing machine, you only need to preset the necessary parameters before testing and then send the test machine a start command.

The machine will automatically complete all steps during the entire test process. It can save you time, worry, and effort.

Computer Control

A computer installed with special software is required to connect with the machine. This servo-hydraulic universal testing machine’s operation on the data acquisition, analysis, control, presentation, statistics, storage can be completed via the computer.

The software has very clear navigation prompts and a humanized operation interface. After opening the software, you can select your test type, including tensile test, compression test, and flexural test. There are many different specific test items preset in each test type for you to choose. The main test objects of these test items are the samples of steel and mortars.

Before the test, the system allows you to customize the test group number and the number of test pieces. Different test types will require you to enter specified parameters, such as the diameter and cross-sectional area of the sample. When you do a constant load test, you can customize the constant load, the duration of the constant load, the loading time, and the loading rate.

When you start the test, various real-time vales will be displayed on the computer screen, such as force value, loading velocity, maximum force value, displacement, displacement velocity, maximum displacement, extension value, etc.

The real-time data of the test can also be expressed in the form of a curve on the computer screen. The abscissa and ordinate can be set to represent different parameters to generate different graphs including “force-time”, “force-deformation”, “strain-elongation”, “force-displacement”, “displacement-time”, etc. In this way, you can easily observe changes and trends of various data in the test process.

All test data can be stored, viewed, and recalled. The test result can support on-site printing (Another printer is required). Start, stop, reset, pause, return, the rise and fall of the oil cylinder can be easily controlled on the computer software with the mouse.

Hand-held Remote Control

In order to facilitate the user to adjust the distance of the test space and clamp the sample, we have equipped this Servo Hydraulic Testing Machine with a remote control hand set connected to the machine by a cable. It features a compact size and a light weight. A few keys are distributed on the front panel.

There are 4 keys responsible for the opening and closing of Jaws in the upper jig and the lower jig. When you stand by the machine and want to put the sample into the jaws, you only need to press the corresponding button once, and the fixture will automatically grip the sample according to your instructions.

There are also two keys on the remote control used to control the motors responsible for moving the movable crossbeam up or down. You only need to long press one of them, and the fixture connected to the moving beam can rise or fall to your desired position to match your mounting of the specimen.

Extensometer

If you have a high requirement for strain measurement of the specimen, the extensometer is recommended. Different types of extensometers with various accuracy are available here. We will provide you with an electronic extensometer with a gauge length of 50 mm as standard. The range is 0 ~ 15 mm. Please advise us of your other special requirements. Our sales engineers will submit a solution to you.

Manual Hydraulic Universal Testing Machine

Manual Hydraulic Universal Testing Machine is an economical solution of using hydraulic power source equipment to perform tensile, compression, bending, shear tests on metal or non-metal samples. This hydraulic universal test machine is characterized by the open-loop control requiring hand operation to apply the load to the specimen through the oil delivery valve. It has a manual oil supply valve and a manual oil return valve to adjust the amount and speed of oil supplied to the working cylinder.

The manual Hydraulic Tensile Testing Machine is widely used in metallurgy, construction, aviation, aerospace, and other fields for product performance evaluation, quality inspection, and new product research and development.

Manual hydraulic universal testing machine
  • With the Open-loop control: Manual loading and control the loading speed.

  • It has a two-support and two-lead-screw structure to ensure sufficient bearing strength.

  • Able to perform tensile, compression, and flexural tests.

  • Machines of different capacities are provided to meet various testing needs.

  • Equipped with LCD to display the force value, loading rate, peak value, and other parameters and curves.

  • After the test, the maximum loading force, tensile strength and other information can be automatically calculated and displayed.

  • Built in a thermal printer to print test results.

  • Configured with a hand-held remote control for specimen mounting.

  • Comes with 3 sets of different fixtures and attachments.

  • Multiple jaws of different sizes are available, and different samples can be clamped for testing by changing different jaws.

  • The adjustment of the test space is realized by moving the middle crossbeam up and down.

  • The machine has overcurrent, overvoltage, overload and limit protection functions.

The oil in the tank is sucked into the oil pump through the oil filter net and then sent to the oil supply valve through the oil delivery pipe of the oil pump. When the oil delivery handwheel is closed, the oil flows from the oil return pipe to the oil tank. When the oil delivery handwheel is turned on, the oil enters the working oil cylinder through the oil pipe to drive the lead screw to rotate and cause the moving crossbeam to move up and down. At the same time, the oil is synchronously acted on the pressure sensor through the pressure oil pipe, and the sensor signal is converted and processed by the microcomputer measurement and control system to indicate the test force value.

Model U2-WE-100 U2-WE-300 U2-WE-600 U2-WE-1000
Capacity 100 kN 300 kN 600 kN 1000 kN
Effective Measuring Range of Load 2 ~ 100 % F.S
Load Resolution Better than 1 % the indicated value
Piston Stroke 250 mm
Control Mode Manual
Max Vertical Test Space Between Tensile Grips 650 mm
Max Vertical Test Space Between Compression Platens 550 mm
Front column spacing 540 mm
Acceptable Diameter of Round Specimens for the Tensile Test 6 mm ~ 26 mm 13 mm ~ 40 mm
Acceptable Thickness of Flat Specimens for the Tensile Test 0 ~ 15 mm 0 ~ 30 mm
Utmost Width of Flat Specimens for the Tensile Test 75 mm
Diameter of Round Platens for Compression Test 160 mm
Attachments for the Flexural Test Roller spacing of the lower attachment: 30 ~ 600 mm

Width of the roller: 140 mm

Diameter of the roller: 30 mm

Power AC 380 V / 50 Hz / 3-phase / 5 lines
Dimension of the Load Frame 810 × 560 × 2050 mm 810 × 560 × 2050 mm 880 × 580 × 2150 mm 1060 × 660 × 2450 mm
Dimension of the Control Cabinet 580 × 550 × 1280 mm 580 × 550 × 1280 mm 580 × 550 × 1280 mm 580 × 550 × 1280 mm
Weight 1500 kg + 320 kg 1800 kg +320 kg 2100 kg + 320 kg 2800 kg +320 kg

Load Frame

There are two columns and two lead screws on the bench of the load frame. The tops of the columns are connected by a fixed cross head to form a rigid frame. The column is made of precision steel to ensure that it has enough strength to bear the force during the tensile test.

There is a cross head supported by lead screws at both ends, which can move up and down. It divides the test space of the load frame into two. The upper space of the moving cross head is used for tensile testing, and the lower space of the moving cross head is used for compression and bending testing. The test area is equipped with a special protective cover to protect the operator from preventing injury when the sample breaks.

The two spaces do not interfere with each other during the test. You can do these two tests directly, one after the other, without changing the fixture. It significantly saves you time and energy and improves test efficiency. Because these fixtures are cumbersome, replacing them is not so easy.

The working cylinder of this machine is located in the lower part of the load frame. The cylinder and piston are the main parts of the drive unit. Their contact surfaces are precisely processed, and a specific clearance and proper oil film are maintained. Therefore, special attention should be paid to the cleanliness of the oil during use. Do not allow impurities and iron filings in the oil to enter the working cylinder through the oil pump, oil valve, oil pipe, etc., which will damage the contact area of the cylinder and the piston, thereby affecting the accuracy of the test.

Control Cabinet

The shell of this hydraulic universal test machine’s control cabinet adopts complete plastic spraying treatment to prevent rust and moisture. There is a digital LCD on the top operation panel that can display the loading rate, loading force value, peak value, test curve, and other information in real time during the test.

The display interface includes the test method selection interface, the test parameter selection interface, the test operation, and result display interface, and the curve display interface. In addition, there are various touch keys next to it to assist you in setting various test parameters. The power button and indicator light and the on-off button of the high-pressure oil pump motor are located on the operation panel.

After the test is completed, the test results such as the maximum loading force, tensile strength, and yield strength rate are automatically obtained. Test data can be stored. The built-in thermal printer supports result printing.

On the front side of the control cabinet, the two manual valves are the most conspicuous. One is the oil supply valve (oil delivery valve), also known as the load & speed control valve. The operator manually rotates and opens this valve to allow the oil pump to output high-pressure oil into the working cylinder of the hydraulic testing machine to drive the moving cross head on the load frame to move up and down. At the same time, it can control the speed at which the force value increases. The other is the oil unloading valve (oil return valve). After manually turning this valve open, the oil in the working cylinder will flow back to the oil tank to unload the load.

The oil supply valve plays a critical role in the entire test process. During the hydraulic loading process, the operator needs to adjust the oil supply volume and oil supply rate based on real-time data displayed on display.

The oil tank is located inside the control cabinet. There is an oil window outside the oil tank to observe the oil level. The high-pressure oil pump is directly connected with the motor and installed on the oil tank cover. The high-pressure oil pump is an axial plunger pump composed of seven sets of piston pairs. The piston and sleeve in the oil pump have high surface quality and good cooperation, which ensures the possibility of high-pressure production and minimizes the oil leak.

Fixtures & Attachments

Same as the servo-hydraulic universal testing machine, we also configure three different fixtures for this manual hydraulic testing machine to enable it to perform tensile, compression, and flexural tests. Please check the above according part for more details.

  • Read the instructions carefully before use. During the test, if due to some particular reason, the oil pump suddenly stops working, press the stop button immediately to remove the applied load, and then check and troubleshoot the problem, avoiding damage to the oil pump.

  • During the test, if the electrical components suddenly fail, the power supply should be cut off immediately to stop the machine, and the test should be performed after checking and troubleshooting.

  • During the test, it is strictly forbidden to start the moving crossbeam when the hydraulic load is applied or unloaded so as to avoid the failure of the lifting drive mechanism.

  • It is forbidden to operate on the machine by non-operators.

  • All parts of the servo universal testing machine should be wiped clean from time to time. After wiping the unpainted surface, wipe it with a small amount of engine oil with a sand cloth to prevent rust. Pay more attention to wiping during the rainy season.

  • Cover with a plastic cover when not in use to prevent dust intrusion.

  • After each test, clean up the workbench for the next use.

  • All valves of the oil tank should not be opened frequently to prevent dust from entering the interior.

  • All power supplies should be turned off after the test.

  • The threaded part of the lead screw used for the lifting and lowering of the moving crossbeam should be lubricated frequently according to the usage, and can be coated with cylinder oil or butter with higher viscosity.

  • The electromechanical universal testing machine mainly uses a motor as a driver, plus a reducer, frequency converter, ball screw, gear chain, etc., as transmission components to realize the movement of the crosshead. Because it does not use an oil source, it is cleaner than the hydraulic universal testing machine, and it is more convenient to use and maintain.

  • The electromechanical universal testing machine is smaller and lighter than the hydraulic universal testing machine, so it is convenient to add corresponding devices to do various material mechanical tests.

  • Limited by the oil source flow rate, the testing speed of the hydraulic universal testing machine is slower than that of the electromechanical universal testing machine.

  • The hydraulic tensile testing machine uses a high-pressure hydraulic source as the power source. Its ultimate load is generally much higher than that of the electronic universal testing machine. The hydraulic testing machine is mainly used to test steel, concrete, and building materials with high material rigidity. Electronic tensile machines are widely used in generous materials, such as wood, plastic profiles, wires and cables, paper, film, rubber, medicine, food packaging, fabrics, etc.

  • For tensile machines with a capacity of 300 kN or less, generally, electric tensile machines are cheaper than hydraulic tensile machines.

  • In short, if your sample is steel, concrete, and other materials with exceptionally high tensile or compressive strength, the hydraulic universal testing machine is the first choice. If your sample is of other materials, the electronic tensile machine is a better choice. We can provide both. If you don’t know how to choose the right one, please contact us directly to get help.

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Please feel free to contact us for more details on the product, price, lead time, payment terms, shipment methods, etc. AMADE TECH sales specialists will respond within one working day.

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