Product Name: microcomputer controlled electro hydraulic servo expanding ring testing machine
Product Description
In order to meet the needs of industry of our country oil pipe yield strength test, with reference to international industry standards, American Petroleum Institute API Spec 5L.API spec 5L standard reference ASTM A370 steel mechanical performance test method and definition standard. So stone tubing expansion ring test machine; in accordance with ASTM A370-05 standard ring on hydraulic expansion method determination of transverse yield strength requirements are, due to the transverse yield strength standard in our country has not yet developed the determining of hydraulic loop method, we must also according to the characteristics of our country oil pipe, to meet China's oil pipe expanding ring test requirements. Therefore, the development of large ring test machine is particularly necessary.
Characteristics of testing machine
In order to test the static mechanical properties of pipeline steel raw materials, welded pipe forming the whole tube oil filled high voltage when the mechanical performance test, providing more in line with the actual application status of the test means. Therefore, to future oil tube design provides more actual and reasonable basis, is of great significance. The development of the testing machine successfully fill the our country hydraulic loop method determination of transverse yield strength standard test field blank.
The testing machine by my company with a number of research institutes jointly developed. The machine adopts the electro-hydraulic proportional servo technology, high control precision, chain extension and control software developed by the iron and Steel Institute.
In monitoring and control system, accurate test ring expansion of sample should stress and strain data, convenient operation and friendly interface, database, with statistical data, convenient search function is very necessary.
Software introduction
1. In accordance with ASTM A370 standard requirements, the software can real-time display stress - strain rate, stress strain curve, strain rate, loading rate, hydraulic oil pressure. After the completion of the test can at any time the dynamic playback function of the testing data can be real test reviewing the whole process, the control state of the loading rate, the expansion of the ring specimen force / deflection curves and real display every moment of force / deformation characteristics.
2. Automatic test expanding ring specimen total extension strength Rt0.6 considering the characteristics of different levels of pipeline steel, of the provisions of the total elongation strength RT T values can be arbitrary input is calculated, at the same time with the specified non proportional extension strength Rp0.2 data automatic test function. If necessary can be retrieved at any time curve and enter the conditions required to obtain any relevant data. Intuitive and convenient in the curve depicting the test point data.
3. In order to guarantee the security, when the force up to the required total strength Rt0.5, the software automatically issued experimental force in place, stop adding to pressure command. Can also according to the different expanding ring specimen characteristics, artificially set the stop instruction.
4. to establish a database can automatic and manual save the test data. With statistical functions, convenient search function to find. According to the expanding ring specimen design features: print the test curve format, test report format.
Hardware
1. computer: brand dual core computer 1 units (users can customize)
2. printer: printer 1
3. data acquisition system: 1 sets
Including: dual high precision amplifier, dual channel broadband data collector, dual synchronous A/D converter, control signal output module.
4. ring expansion extensometer
    Development of expanding ring specimen special extensometer, the adaptation of the expanding ring specimen diameter tolerance, convenient clamping in expanding ring specimen. Can at any time according to changes in the circumference of automatic tracking and measuring.
    A. expansion ring chain extensometer gauge is provided with 1219: expansion ring specimen, as expanding ring diameter can be adjusted to adapt.
    B. to ensure that the chain in the center of the expansion ring of the height of the test, designed to maintain a high degree of height.
    C. measurement range: maximum deformation 25mm.
    D. accuracy level: better than 1.
    E. quantity: 2 sets.
Comprehensive index
    A. pressure accuracy: better than 1%
    B. extensometer accuracy better than  level 1
    C. Refer to the "JJF 1103 Universal Testing Machine Computer Data Acquisition System Evaluation" for evaluation, the system test accurately meets the requirements of the expansion ring test.
Technical parameter
1. the maximum system pressure 31.5Mpa
2. the maximum sample straight through 1219mm
3. deformation measurement range 0---25mm
4. voltage 50Hz 380V
5. size 1400 * 1400 * 1700mm
6. the weight of 7000kg