First, application background
With the continuous development of household appliances and industrial control products, various manufacturers have developed in the direction of electronic fittings, in which the electrical joints, air connector applications are also extensive. We have received a R & D project this time. For air-conditioning sensor products, the project is used to produce electrical connector products. It is mainly used to apply high temperatures. In a vacuum environment, the copper lead in the shape and package mold of the glass powder, and the final melted glass glaze is cooled. Good intensive insulators and seals.
This type of product has a wide range of applications, air conditioning accessories, motor parts, and various industrial products.
Second, the application needs
At present, the prototype has been completed, and after the customer's test is successful, it has been sent to the client office to prepare to install debugging. It belongs to the initial stage of success, and the size production of the product has not yet realized the product.
The following features are mainly required:
1) Vacuum, customer products need to be formed in vacuo, mainly to reduce bubbles in the connector, improve product quality, bubble reduction is also conducive to glass plastic
2) Temperature, the equipment needs to rise to 1300 degrees of high temperature, and for a period of time, with the product firing process, it is necessary to use the vacuum and other gases, and the control requirements for logical relationships, the process of process must be controlled
3) The gas and hydrogen atmosphere need for nitrogen and hydrogen atmosphere during the firing process, and the workpiece is treated
4) Detection system, equipment safety use requires real-time monitoring of water temperature, water pressure, gas pressure, vacuum, and oxygen-containing amounts
Third, solution
At present, our design is to use a pressure vessel can, and use the hole we need on the pressure container, and weld the tube to make the shape and structure we need, and then the heater is mounted in the pressure vessel can, with copper electrode And the transformer power system is connected. This makes the body will be done.
The heating portion is heated by transformer and resistor, controlled by temperature control instrument and instrument, and copper row as a electric Li connection vector. The vacuum system purchases the entire vacuum unit of the South Guanggua, which is agreed to the control signal interface of both parties, and use the start and stop of the switch control unit. Other gas part purchases a dedicated gas control valve, controlled with a switch, and the solenoid valve opens the control signal that is controlled as a gas. Other types of sensors purchase mature switch products in the market, introduce the PLC part.
The main control uses a 60-point PLC to make a control cabinet, install the PLC, other intermediate relays, control switches, switching power products, and the operating interface selects a touch screen as a human machine interaction interface. Easy to view the status of the device, and each component is operated.
A variety of instruments are installed on the operation panel, and the operation buttons can be visually observed, and the main status of the equipment is observed, and the grasp of the feed and tether can also be fully automated with the system. Waterway part and gas lines are an important part of the equipment. We invite professional construction staff for construction, guarantee the reasonable allocation and cooling effect of waterway, and the gas part is welded by hydrogen, so that sealing performance is guaranteed.
Fourth, hardware configuration
Figure 1 Interior of the on-site control cabinet
Figure 2 On-site control cabinet exterior map
Figure 3 on-site construction drawing
V. Software design
Figure 4 Main program screenshot 1
Figure 5 Main program screenshot 2
6. Summary of application
I used to be mainly Mitsubishi's PLC and Siemens PLC. Comparing these two brands of PLC, the sea is done in the design, mold quality, etc., it is more convenient to use, and the programming software is easy to understand. There is no obstruction in the operation, and the application instruction set is also relatively rich. Although many instructions I have not used, but probably look at the manual, I can meet all my current work design, and the applications of various industries.
This time, I made a high-temperature saken, mainly used things for switching control, as a relatively simple and conventional project, many sea color advantages did not reflect, such as the function of communication, and the application of sports control. I have the opportunity to use it again. I feel that our brand should also make a breakthrough in the design of the product structure, do not limit the existing PLC model and appearance, should be designed to better industrial product design, and enrich some product lines.
In short, this experience is still good, the customer is also very satisfied. Thank you for this event and support for the PLC. , Reading the full text, the technology area
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