Jinan Jinli Testing Instrument Co

1. Introduction The microcomputer-controlled electro-hydraulic servo system produced by Jinan Jinli Testing Instrument Co., Ltd. (Jinan Jinli Testing Machine Factory) is a universal servo oil source system and is suitable for oil cylinder sealing in the form of gap sealing. Customized upgraded version of the universal machine host (including the type machine with an upper cylinder), the horizontal tensile machine with a two-way cylinder as the oil cylinder, and the pressure testing machine (including the compression shear testing machine with a corner) produced by various testing machine manufacturers with single tension and medium pressure. It can meet the testing needs of dynamic testing machines. The system has low noise, large flow, stable oil supply, good closed-loop system performance, low power consumption, and is equipped with a heat dissipation system to meet the needs of customers for long-term testing. The whole machine test operation and data The processing complies with the requirements of "Metal Tensile Test Methods for Room Temperature Materials".
Note Jinan Jinli Testing Instrument Co., Ltd.
(Jinan Jinli Testing Machine Factory) is/is the unit that assists in the promotion of room temperature tensile testing method).
2. Necessity
It is clearly pointed out in the introduction of / Tensile Test of Metal Materials Part 1: Room Temperature Test Methods
This version of the standard provides two methods for controlling the test rate. The first method is the strain rate (including the beam displacement rate) and the second method is the stress rate. The method aims to reduce the change of the test rate when measuring the strain rate sensitive parameters and reduce the measurement uncertainty of the test results. This section will be used in the future. It is recommended to use the strain rate control mode to conduct tensile tests.
It clearly states that this method will recommend the use of strain rate control mode to conduct tensile tests in the future.
In our actual testing work, we will encounter Different testers, different laboratories, and different testing machines will test the same material and the data will be different. This may be due to the different stretching rates selected by different operators, the different software data processing systems used by the testing machines, and the use of It is caused by various factors such as different flexibility of the tensile system of the testing machine. This is what all our test workers do not want.
In order to ensure the consistency of our test data, it must be strictly implemented/accurate. This standard not only proposes The method strain rate control mode and method stress rate control mode are proposed, and the strain rate estimated based on the parallel length in the method~_
is proposed for the flexibility correction method of the testing machine, as well as the use of computer-controlled tensile testing machines. Suggestions. This is extremely important for us to obtain accurate and consistent mechanical test data.
In the current era of popularization of computers, it is feasible to ensure strict implementation/accuracy. But for the older universal testing machines currently in service (Mechanical dial display, microcomputer screen display, and digital display. Due to historical factors, those testing machines can only manually control the loading rate of the testing machine, which is not yet satisfactory/accurate. However, it can be achieved through technical transformation of the testing machine (through Replace the oil source, add servo valves and differential pressure valves capable of servo control, upgrade to an electro-hydraulic servo universal testing machine, rejuvenate the old-fashioned testing machine, meet / accurate requirements, and continue to serve the society.
/ Standard regulations< br/> The performance result values measured by the test should be rounded in accordance with the requirements of the relevant product standards. No specific requirements are specified, and should be rounded in accordance with the following requirements
Strength performance values are rounded to
Yield point elongation Rounded to, other elongation and elongation after fracture rounded to The accuracy is generally at the maximum range/. By upgrading the measurement and control system, the force measurement accuracy can reach the maximum range/, which greatly improves the accuracy of the test results.
The purpose of the transformation is to enable the testing machine to have strain rate and stress rate control The ability to accurately and efficiently obtain the yield strength of the material ( ).
3. Main performance technical indicators
, system maximum pressure
, effective control range
, test force display Value accuracy (depending on host and sensor accuracy)
, displacement measurement resolution
, deformation measurement standard configuration gauge length, maximum deformation amount
, deformation measurement accuracy
, constant force, constant Deformation, constant displacement control range
, constant force, constant deformation, constant displacement control accuracy
When the value is set, within the set value
When the value is set, within the set value
br/> , Deformation rate control accuracy is within the set value when the speed is high
When the speed is high, it is within the set value
, Maximum moving speed of the piston / (determined according to the actual situation)
, Clamping hydraulic pressure Clamping (optional)
, overall dimensions of oil source
, and weight of oil source.
4. Functional characteristics of the control system
Computer control system has the advantages of high integration, stable performance, and easy adjustment. Test data can be collected in real time, and test characteristic curves can be displayed dynamically in real time. Test data files can be saved in common databases or large databases, which facilitates customer resource sharing and network management, as well as user re-analysis. The software can easily access various user-defined reports, solving the problem of different users or the same user having different needs for test reports at different times. The software can process raw data of test force, displacement, time and curves derived therefrom.
, operating system/platform, full Chinese operation interface. The system integrates data processing and data analysis
and protection functions. The machine has two limit protection methods, software and mechanical. The proportion of automatic shutdown when exceeding the maximum load can be dynamically set with overcurrent, overvoltage, overload, etc. a protective function.
. Automatic marking of load channels can be realized, which is intuitive and convenient.
Batch testing can realize hierarchical display of curves, and the curves can be automatically followed.
This software can realize user-defined speed setting and computer adjustment of speed. High-precision speed calibration can also be achieved, and speed gears and codes can be adjusted at any time.
, It has a variety of fully digital closed-loop/open-loop control functions such as test force, displacement, stress, strain, etc., and each control mode can be freely and smoothly switched
, It has a complete test process programming function, and programmable steps The number of steps can be reached and can be expanded as needed to complete the editing of the test process with any complexity and any control mode switching. At the same time, it provides data analysis functions to meet the requirements of test personnel for test analysis and data processing of special tests
. Monitoring the test process can realize real-time display of test force, displacement, curve and other parameters during the test process.
. Software permission hierarchical management function. In order to improve the security of software and data, the software can achieve hierarchical permission management functions by setting different password protections.
After the test operation of the result reproduction function is completed and saved to disk, it can be opened at any time in the future according to the user's needs and the test data can be reanalyzed.
, load-time, load-displacement, displacement-time and other curves can be selected according to user needs for testing and data display, storage, analysis and printing.
The curve point-by-point traversal function can use the mouse to click on the force and deformation values on the curve to obtain various parameters of each point.
The result comparison function can observe multiple test curves at the same time, and can compare the characteristics of the sample to be analyzed through the superposition and partial amplification of multiple curves.
, force interface, force channel interface and test software can be equipped with various sensors according to user needs, and can perform calibration, modify parameters and normal tests.
The data sampling frequency can be selected according to user test requirements.
5. System configuration list (conventional)
, drive motor Wannan motor
, oil source piano table type for servo control
), self-made electro-hydraulic servo valve
), High-pressure pump Italian Mazzucci pump
), special servo valve group homemade
, dual-channel programmable amplifier resolution/
, high-precision hydraulic sensor Ningbo Zhenhai
, extensometer Beijing Iron and Steel Research Institute
, cable-type displacement measurement system
, a full set of accessories including commonly used ring combination pads, pipe joints, high-pressure oil pipes, etc.
, special control software
, Lenovo commercial brand machine
, HP inkjet printer
Jinan Jinli Testing Instrument Co., Ltd.