PLS-100 Electro-hydraulic Servo Dynamic and Static Universal Testing Machine

Transcription

1 PLS-100 Electro-hydraulic Servo Dynamic and Static Universal Testing Machine Applications: PLS-100 electro-hydraulic servo dynamic and static universal testing machine is produced according to the dynamic servo test technology, and utilizes the design methods of unitization, standardization, which enhance the stability and reliability of the system. The machine is mainly used for the dynamic and static mechanics performance tests to material and parts, equipped with corresponding accessories, it can do tensile, compression, low cycle and high cycle, crack growth tests and other mechanics tests for various kinds of materials, and it widely used in the fields of aviation and aerospace, ship-making and military industries. Working Principle: For this machine, the principle is as follows. Main specifications: 1. Max. load: ±100kN 2. Max. Amplitude of the actuator: ±75mm with accuracy from less than ±0.5 % of full scale 3. Load accuracy: ±0.5 % 4. Deformation measuring accuracy: ±0.5% 5. Frequency range: Hz 6. Main wave shapes: sine wave, square wave, triangular wave, static test oblique wave. 7. Diameter of piston: Φ180mm 8. Distance between two columns: 715mm 9. Test space(vertical distance between crosshead to base platen): 1260mm 10. Specimen clamping: Hydraulic forcing clamping. 11. Constant pressure servo pump station: Flow 45L/min,pressure 21Mpa,Motor power 22kW Configurations: The machine consists of load frame, linear servo actuator, power unit, hydraulic grip, EDC 580 controller from Doli & correlative test software and other necessary accessories. 1. Load frame The load frame includes crosshead, columns, load cell and other hydraulic units. The stiffness is 460kN/mm. It is free standarding,rigid, heavy duty type, precision aligned. 2. The crosshead is by hydraulically operated and be fitted with hydraulic ifts to adjust the upper cross head at variable heights. The hydraulic clamps for position-locking of the crosshead with panels.

2 Hydraulic lift cylinder and hydraulic forcing clamping of the crosshead to the columns. Celtron load cell from USA with overload 150% of accuracy ±0.25% of load range 1/100 to 100%. Hydraulic grips Solid steel for high stiffness, chrome plated for long life, easy cleaning. Precision machined to maintain load unit alignment. Hydraulic actuator with built-in LVDT from MTS Moog servo valve Isolator mat to avoid vibration Actuator manifold: _Provides mounting for up to two servo valves for high fatigue cycle and low fatigue cycle test.

3 3. Linear servo actuator 1) Module unit design. Its feature is low friction, high response, small exposure inside, and strong anti-lateral load capacity. 2) It is equipped with universal joint and suitable for several kinds of installation methods (front & back flange, back hinge, foundation installation). 3) Double direction piston. Sealing method: guide ring + servo sealing ring. 4) LVDT(MTS) displacement sensor is installed inside actuator and electro-hydraulic servo valve is installed outside actuator. Teflon guide sleeve is installed between LVDT displacement sensor and piston rod, small friction and good guidance can guarantee trouble-free long-time work of sensor. 5) Actuator amplitude limit is designed within hydraulic damping area to avoid running out of control. 6) Load sensor is set up on the piston rod end. 7) Hand-held remote controller to control the actuator s positon and grips. 4. Standard Constant Pressure Servo Pump Station & Pipes BST series constant pressure servo pump station is designed and manufactured with standard modularization cell. It is used for electro-hydraulic servo static and dynamic universal testing machine and various electro-hydraulic servo fatigue test machine. It features constant pressure test, high filtration precision, low noises, smooth operation and long service life. The system is protected by automatically shut down or alarming while the temperature or oil level exceeds the limits or oil filter blocking occurs. Model BST45 Flow: 45L/Min Power: 22kW, 380/415V, 50Hz Pressure: 21MPa 24 VDC control Filtration precision: tertiary filter,precision:3μm Pipeline and sealing elements: PARK Oil pump: NACHI Motor ABB motor Hydraulic manifold with Off/low/high Servo valve with 2 stages with plug and sockets Noise cover to keep the noise level below 65 db(a) Protection device: oil level, temperature, filter, pressure, power level, over load, filter blockage. Emergency stop is also provided.

4 5. Load cell from Celtron With over load capacity of 150%. Accuracy is ±0.25% of load range 1/100 to 100% M-025-ST From Epsilon fracture mechanics Clip-on gages for fatigue crack test M-020-ST from Epsilon for tensile and fatigue testing. 6. Doli EDC 580 controller: EDC 580 controller (including software); waves including sine, square, triangle, ramp, saw etc. Real time graph, Test report can be printed according to customer requirement. Sample rate: 5kHz continuous and synchronous for all channels. Communication Processor AMD 520, 133 MHz Control Processor TI 32 Bit DSP 150 MIPS RS485 Interface for external keyboard/display supports max. four devices Drive Interface ±10V (16bit) analogue command output OR, digital command output, and safety functions like 4DI PC communication via USB or Ethernet Eight I4-Bus option slots Internal socket for serial Sensors (COM 1) Internal socket for Debug (COM 2) Internal socket for Synchronisation Option Internal socket for servo valve amplifier, 160 and 320 Watt DC-drive amplifier Drive Interface ±10V (16bit) analogue command output,digital command output, and safety functions like 4DI

5 EDC580 function overview: Minimal control loop cycle time: 0.4ms Encoder SSI input channel (on board): max 32 MHz (app. 300 khz) Digital inputs with 24 Volt level: 8 Digital outputs with 24 Volt level: 8 Interface to PC: USB and Ethernet General purpose I4 Option slots: 8 Power supply: V AC Internal 24 Volt/2A DC power supply for external devices Drive Interface: ±10 V command output with ±15 Bit resolution digital command output I/O s and relays for safety functions Three channels include load, displacement and strain with sensor plug to recognize signals automatically. RCM7 handheld controller adjust the actuator, Start/stop, hydraulic on/off.

6 Similar watch-dog functions: In case PC gives no answer within 2 seconds, EDC will switch off. Switching off means, we go to position control and keep current position. Then switch off the pump, closed loop controller is still active for maximum 10 seconds (this is adjustable). 7. Software system. 7.1 Static tensile test. ISO6892 tensile test for metal at room temperature and real graph stress Vs. strain etc. 7.2 Frack toughness test.(astm E ) The Test&Motion DynPack module is the software for dynamic tests. DynPack offers the collection, processing and display of measurement data from up to ten channels at the same time. Whereas up to five channels are processed with a data acquisition rate of 5kHz. DynPack displays the following information in parallel windows on the screen: measured values in a digital manner, on-line graph with reduction of data, the covering curve and the oscilloscope window. It is possible to assign simple limits as well as inner and outer limits to the amplitude for each working block. The assignment can be done in a relative and in an absolute manner. DynPack communicates with several EDCs simultaneously. Hence, a two- or three-axis-system can be controlled easily. A function generator with Sine,Square, ramp, triangle and sinusoidal functions is included. Furthermore, it is possible to sweep between frequencies and amplitudes and to superimpose different curve forms.

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9 K1C test LCF test(fatigue test for homogenous metallic materials) ASTM E-606 PID controller is with speed 1000Hz. Preventive devices and controls: - Anti-viration pad of the load frame. -Anti-rotation device to prevent the rotaion of the holder. - Grips interlocking. -Noise filter - Amplitude control. -Adaptive control 6. Test accessories: 6.1 Ø5-12mm round insert with 50mm wide; 6.2 Ø12-21mm round insert with 50mm wide; 6.3 Bending accesory of dia.10mm, Max. span is to 420mm. 6.4 Grips of CT specimen M-025-ST From Epsilon fracture mechanics Clip-on gages for fatigue crack test M-020-ST from Epsilon for tensile and fatigue testing. Product Photo:

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