4. Operation interface The touch screen uses HMI GOT-970, which can not only display real-time information and graphics of various states of the system, but also display switches, indicators, PLC internal data, etc. By operating the above buttons, it can generate corresponding switch information or input values ​​and characters. The PLC exchanges data to generate corresponding outputs to control system operation. As a human-computer interaction interface, the touch screen can easily and quickly monitor the entire test process (see Figure 5). The main screen is designed using the tool software GT Designer, and the required screen can be designed through the tool call of the software tool library and related parameter settings. The system control function can be realized by matching the screen content with the PLC control program. The background software design adopts KING VIEW6.51 Kingview, which makes full use of its modular design, its flexibility, high stability and easy implementation. Through the configuration king, the following functions are mainly realized: test parameter monitoring screen, system history report and real-time report, historical curve and real-time curve, alarm and so on. (1) Test parameter monitoring screen The system interface consists of parameter monitoring interface, temperature control interface, washing furnace interface, atmosphere control interface, swing control interface and help interface (see Figure 6). The monitoring of various parameters such as temperature, pressure and swing speed is realized by screen switching. (2) Real-time curve and historical curve The real-time curve can monitor the trend of test parameters such as temperature, pressure, and yaw rate. The history of all variables will be stored in chronological order in the file with time information on the hard disk. (3) System history alarm and real-time alarm Once the system alarm occurs, the real-time alarm screen will automatically pop up to give the alarm information and enable the PLC to take corresponding actions to avoid a larger accident. When the alarm disappears, the screen will automatically close. (4) System report system report can be divided into real-time report and historical report; can record data in real time and save and query historical data; Kingview report can be converted into Excel form for printing and processing. Fourth, testing machine working procedures The appearance of the test machine is shown in Figure 7. (1) First install the sample to unload the weight, then insert the sample holder with the sample plate into the working slot in the furnace, close the electric furnace door and the air chamber door, and load the weight according to the test requirements. (2) The system is powered on and the cooling water is turned on, and the electric furnace is heated. (4) After starting the test of the electric furnace heating to the temperature required for the test, start the semi-circular roller and start the simulation test. (5) After the test time is over, stop the rotation of the semi-circular roller, stop the heating of the electric furnace, and then unload the weight (when working with hydrogen, the working atmosphere post-processing procedure should also be started). (6) When the electric furnace is cooled to less than 100 °C, turn off the cooling water and open the door to take out the sample. Third, the main technical indicators of the testing machine Adaptation power supply: AC three-phase 380 V; Motor power: 600W; Maximum speed: 200r/min. Fourth, the conclusion (1) Simulate the working state of each roller of CAL. Previous page
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(3) Working atmosphere in the gas chamber (Before using the hydrogen mixed atmosphere, the furnace washing procedure must be started) Set the cylinder outlet pressure to 0. 4MPa; after the inflation valve is opened, adjust the gas ratio meter nitrogen flow meter and hydrogen flow rate. Calculate the output of the required working gas in the test. The automatic control chamber pressure is maintained at 2 kPa.
Electric furnace atmosphere: N2 - 5% ~ 35%) H2 adjustable.
The maximum temperature of the electric furnace: 1000 °C.
Sample loading: 0.2 ~ 0.4 MPa; Loading method: weight gravity.
Semi-circular roller specifications: 150mm × 90mm.
Sample (coated) Specifications: 100mm × 50mm × 10mm.
(2) In-depth study of the mechanism of accumulation of tumors.
(3) Design and optimize the surface of the furnace roll against high temperature build-up coating.
(4) Rapid development of coating materials.
(5) Predict the service life of the furnace.
(6) Reduce the risk and cost of coating roll test on the production line.
