The technological characteristics of CNC machining center can be summarized as follows:
Suitable for processing cyclical compound production parts. The market demand for some products is cyclical and seasonal. If a special production line is used, the gain is more than the loss. The processing efficiency with ordinary equipment is too low, the quality is unstable, and the quantity is difficult to guarantee. After the first piece of trial cutting with the machining center is completed, the program and related production information can be retained, and the next time the product is reproduced, it only takes a long time to start production.
It is suitable for processing high-efficiency and high-precision workpieces. Some parts require little, but they are key components that require high precision and short construction period. The traditional process requires multiple machine tools to coordinate work, which has a long cycle and low efficiency. In the long process flow, it is easy to produce waste products due to human influence, resulting in significant economic losses. , While the processing center is used for processing, the production is completely controlled by the program, which avoids the long process flow, reduces the hardware investment and human interference, and has the advantages of high production efficiency and stable quality.
Suitable for workpieces with suitable batch size
The flexibility of processing center production is not only reflected in the rapid response to special requirements, but also can quickly realize mass production, possess and improve market competitiveness. The processing center is suitable for small and medium batch production, especially small batch production. When using the processing center, try to make the batch larger than the economic batch to achieve a good economic effect. With the continuous development of machining centers and auxiliary tools, economic batches are getting smaller and smaller. For some complex parts, 5-10 pieces can be produced, and machining centers can even be considered for single-piece production.
Suitable for processing parts with complex shapes
The application of four-axis linkage and five-axis linkage machining center and the mature development of CAD/CAM technology have greatly increased the complexity of machining parts. The use of DNC makes the processing content of the same program sufficient to meet various processing requirements, making the automatic processing of complex parts very easy.
The machining center is also suitable for processing multi-station and concentrated work pieces; difficult to measure work pieces. In addition, workpieces that are difficult to clamp or whose machining accuracy is ensured by alignment and positioning are not suitable for production on a machining center.
Processing characteristics of machining center
Compared with ordinary machine tool processing, the machining center has many remarkable technological characteristics.
Wide process range, capable of processing complex curved surfaces
Like the CNC milling machine, the machining center can also realize multi-axis linkage and easily realize the processing of many spatial curves and curved surfaces that are difficult or impossible to machine with ordinary machine tools, greatly increasing the process range of the machine tool.
Highly flexible, easy to research and develop new products
The so-called flexibility means "flexible" and "variable", which is relatively "rigid". In the past, many companies used modular machine tools and special machine tools for efficient and automated production, but these modular machine tools and special machine tools were specifically designed for a certain process of a certain part. They are suitable for stable mass production of products and cannot adapt to multiple varieties. , Small batch production. Now, even for mass-produced products, the history of unchanging varieties for many years is gone. Once the varieties change, these modular machine tools and special machine tools can no longer be used, and the application of modular machine tools and special machine tools is increasing. Few, is being replaced by CNC equipment. The general mechanical profiling machine tool can process some more complex parts, but after the product is modified, it is necessary to redesign and manufacture cams, masters, templates or drilling dies, etc., and the production preparation cycle is longer. When the processing object is changed, the machining center can process new parts only by changing the processing program and adjusting the tool parameters. The production preparation cycle is greatly shortened, which provides a shortcut for the improvement and modification of new products. At the same time, because the machining center has an automatic tool change function, it has more advantages than a CNC milling machine in processing various types of parts and various surfaces.
High processing accuracy and good surface quality
The processed parts have good consistency and stable quality. The pulse equivalent of the machining center is generally lμm, and the high-precision machining center can reach it. The motion resolution of 1μm is much higher than that of ordinary machine tools. Most of the machining centers use semi-closed loop or even full closed loop position compensation functions, which have high positioning accuracy and repeat positioning accuracy. The dimensional errors generated during the processing can be compensated in time, and high dimensional accuracy can be obtained; the machining center uses plug-in The compensation principle determines the processing track, and the processed parts have high shape accuracy; processing on the processing center, the process is highly concentrated, and most of the surface of the part can be processed in one clamping. The parts with high accuracy and good surface quality should be selected for the processing center Processing.
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