It is easy to leave convex lines during processing, which will affect the smoothness and appearance of the processed workpiece. At the same time, when manually programming the cup shape, the tangent point between the straight line and the arc is more difficult to locate and calculate, and the positioning calculation is not accurate. , Thus affecting the processing of dimensional accuracy. During the machining process of the CNC lathe, the flank face of the turning tool is easy to be squeezed and deformed by the arc extrusion. As shown in the figure, it can be seen that there are many transition round corners between the straight lines in the cup-shaped wire frame size figure and the arc is relatively large. It is necessary to convert the complex parts from the DXF file of the ordinary three-dimensional modeling into the tool path file, namely the NCI file, through the MasterCAM software, and then automatically generate the NC command.Ĭup-shaped wireframe and surface modeling For example, processing a cup-shaped surface modeling (see). However, such CNC training is far from being able to meet the processing requirements for the processing of complex parts.
For numerical control programming requirements, only manual numerical control programming of simple parts is required and the parts are processed by numerical control machine tools.
The application of 3MasterCAM software generally carries out numerical control training mainly for the use of numerical control machine tools. The NC command is transmitted to the CNC machine tool through the RS232 interface for production processing. According to these geometric data, MasterCAM will receive the processing according to the processing Date: (1) 01-05-21 requires automatic extraction of these data, analysis and judgment and necessary mathematical processing to form suitable data, and the tool path file NCI is converted into NC commands. The geometric modeling of the part needs to be generated by CAD drawing (the graphic data shown must be accurate, otherwise the accuracy of the NC programming result will be affected), and the computer will automatically generate the geometric data of the part graphics. MasterCAM provides built-in two-way graphic file interfaces, including STA, IGES, VDA, DXF, CDL, STL and ASC, and has the ability to communicate with The function of processing machine tool communication. In terms of CAM, it has a variety of processing methods such as turning, milling, drilling, wire cutting, etc. In addition to the general CAD drawing function, the software also adds strong curve and surface modeling functions in order to meet the needs of parts processing. It can enable students not only to design parts, but also to produce and process the designed parts.ĢMasterCAM software’s characteristic company developed an application software integrating CAD and CAM functions. Complicated, for example, manual calculation and programming of curved parts cannot be performed, and CAD/CAM software must be used for automatic generation of processing programs. The Cnc Machining program is transmitted to the CNC machine tool through the RS232 interface.īecause the price of numerical control equipment is relatively expensive and the number of sets is small, and the number of students participating in numerical control training is large, only by simulating the operation process of numerical control machine tools through a large number of computer simulations can you observe and modify the processing program. The computer and the computer and numerical control equipment are connected with a network cable to form a small local area network (as shown). Configure the corresponding numerical control machine simulation software (self-made) and MasterCAM software on the computer. The author combines teaching with MasterCAM software as the core, coupled with numerical control simulation software and numerical control machine tool training mode, to explain numerical control skills training.ġ CNC equipment environment The equipment for CNC training consists of 80 computers, networks, several CNC lathes and machining centers. The society requires CNC technical talents.
Advanced manufacturing technology is developing towards a high-level direction of full automation in design, manufacturing and management. The application of CNC machine tools has become increasingly popular. With the rapid development of modern industry, cnc machine tools have become the main force in the manufacturing industry.