With the popularization and application of integrated CAD/CAM technology and local area network technology, most companies have now clearly improved the efficiency and quality of new product design and development, process planning, and CNC machine tool programming. Production management has entered the era of networking. The management of CNC machine tools, which is closely related to CAD/CAM, is still in the original state and has become a bottleneck restricting the improvement of modern enterprise management. The realization of the networked management of the enterprise's CNC machine tools has enabled the company's management level to be newly improved.
One system principle
CNC machine tools mainly consist of numerical control devices, servo mechanisms and machine tools. The program instructions input to the numerical control device are recorded on the information carrier and are read by the program into the device, or input manually by the keyboard of the numerical control device. The numerical control device includes a program read-in device and input, operation, control, and output composed of electronic circuits. The numerical control device is classified into point control, linear control and continuous track control according to the control functions that can be achieved.
The main problems before the NC machine tool networking
For NC machines with relatively few program requirements, the manual keyboard input method has been used. The disadvantages of this method are: low efficiency, long machine time, and error-prone.
A CNC machine with a large program input volume uses a desktop computer on the machine side for program transmission. The disadvantages of this method are: bad environment, difficult computer maintenance; more use of commercial system software, adaptability and upgrading difficulties; operating method is complex, and the operator's quality requirements are high; many people operate a computer, program file management confusion. Therefore, embedded IPCs have become a better choice. Advantech's ARK-5280 is used here. It has high-performance processing performance, rich I/O interfaces, and the ability to expand to meet customer applications. Operating Environment 0-45°C or - 20 ~ 55 °C wide power supply DC9V ~ 35V, support CF, 25-inch hard disk storage and other features.
Three solutions to the problem
Through various investigations and studies, the internal LAN of the company has developed to a certain scale. In order to enhance the creation of Chinese manufacturing to China, many CAD/CAM integration applications have become very common. Therefore, CNC machine tools take the path of network management to solve the problem. select.
In the machine networking system, the network server, LAN cable, CAD/CAM system and CNC machine tools are existing resources of the enterprise; the system management machine is an embedded industrial control computer with networked special software and can manage the client management software. Installed on any computer on the LAN as a management workstation; the networked system manager is a dedicated computer that runs a customer management operating system. Its role is to accept the scheduling of each workstation and send instructions to all CNC machine tools on the network to implement machine tool information. The unified management; long-distance communication interface equipment is dedicated to the main control machine and machine tool communication serial multi-porter, which is characterized by long-distance transmission without signal loss.
After the CNC machine tools are networked, there will be significant improvements in NC program management and program transmission.
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