As one of the development directions of mechanical processing, composite machining is also a major direction for the development of numerical control equipment. In a variety of composite processing areas, turning and milling composite machining is currently the most developed area. At various exhibitions at home and abroad, we can see that many machine tool manufacturers have launched such equipment as a display of high-end equipment.
The price of turning and milling combined processing equipment is often expensive. Many companies often treat such equipment as a special machine when they are selecting equipment, but they do not give the equipment more use, often according to the process of a certain part. The need to develop a equipment procurement plan, before selecting the type of equipment, first consider whether the increase in the cost per unit due to equipment depreciation is within the allowable range, thereby deciding whether to purchase such equipment, many turning and milling composite processing equipment are It was introduced in this situation. The reason for this phenomenon is that people do not know enough about the application of such equipment. In addition to worrying about the cost of routine maintenance, the preparation of the processing program is also incomprehensible, so people are more willing to choose to purchase a five-axis linkage processing. Center and a CNC car. In addition, in theory, turning and milling combined machining can effectively improve product quality and production efficiency, but in practical applications, it is not satisfactory, the main factor is the preparation of the processing program.
Here we explore how to program the machining process of the turning and milling complex machining center from the perspective of how to improve the efficiency of the equipment and expand the application field.
First, let's look at how to improve the efficiency of the double-turret turning and milling center. During the machining process, multiple processes of the part can be completed by the simultaneous operation of the double tool holder. The same workpiece can be effectively processed by using the computer-aided processing software to complete the part programming. Reduce processing time. Here are three examples, through which we can see the effect of processing.
The double turret equipment has a two-channel control system, the upper and lower tool holders can be controlled separately, and the synchronous machining can be realized by the synchronization statement in the code. For example, in the following code, M10 and M15 are synchronous statements, and the syntax of the synchronization statement is determined according to the requirements of the control machine. The number of synchronization statements is determined according to the synchronous processing content. The content between the synchronization statements is the content of the synchronous processing.
The optimization of the machining program can undoubtedly improve the production efficiency, especially for the processing of large-volume parts. Imagine saving time of tens of thousands of parts if the machining time of each part can be saved by 1 second. The time and resources will be unimaginable.
Let us look at the field of application of turning and milling composite processing equipment. In addition to being able to be used in large-scale processing of certain products, in some small batch or single-piece production, turning and milling equipment is also very useful. Because it has the control ability of at least one rotating shaft, it can even expand its application range, and can even replace the work of the multi-coordinate linkage machining center.
The following is the application of turning and milling equipment in the processing of impeller blades. Blade machining, as a typical part type for five-axis machining, has a huge market demand. In fact, most of these parts can be completed in the turning and milling center. For some turning and milling equipment with B-axis linkage, the types of parts that can be processed will be more extensive. This kind of equipment not only has the turning function, but also can complete the milling work of three to five coordinate linkage. With the development of the machine hardware, the rigidity of the machine tool can be obviously improved, the rough finishing can be completed at one time, and from the technical point of view, The turning and milling composite equipment has the advantages of simple clamping and positioning of parts, various rough processing methods, and convenient chip removal. At the same time, the turning and milling equipment is getting closer and closer in terms of price compared with the multi-axis milling machining center of the same grade. Therefore, the processing of impeller blades on the turning and milling composite equipment is gradually becoming a reality.
For ordinary C&Y turning and milling equipment, the machining of the blades can be done by means of C-axis linkage. This type of control system is actually a three-axis control system. Through XZC three-axis linkage to complete the processing of the profile, no need to make more investment in the machine, just choose a CAM software that can provide this function (as shown in Figure 1)
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