The traditional milling is processed by the mast, and the modern milling is mostly done by various functional accessories through the ram. It has replaced the traditional processing trend, and its advantages are not only the speed of milling, high efficiency, but also the main The processing of polyhedrons and surfaces is something that traditional machining methods cannot. Therefore, nowadays, many manufacturers are competing to develop and produce ram-type (without shaft) high-speed machining center, because of its economical and technical advantages, and can greatly improve the technological level and process range of the machine tool. At the same time, the machining accuracy and processing efficiency are improved. Of course, various types of high-precision milling head accessories are required for technical support, and the requirements are also high. High-speed milling brings structural changes to the floor-standing milling and boring machine. The centering structure of the spindle head is more common, and its rigidity is high, which is suitable for high-speed operation. The ram drive structure adopts linear guide rail and linear motor drive. This structure is necessary for high-speed cutting. It has been adopted by foreign manufacturers on floor-standing milling and boring machines. Domestic similar products are still rare, and linear is only used on small and medium-sized machine tools. guide. High-speed machining also puts forward higher requirements for environment and safety, which in turn creates the concept of pleasant production. All manufacturers attach great importance to the safety protection and operability of human beings under high-speed operation of machine tools. The fully enclosed structure is safe and beautiful. Process characteristics The traditional horizontal boring and milling machine is mainly suitable for the processing of various mechanical parts, especially the mechanical transmission box and various curved body parts. Due to the improvement of the technical level of various equipments, the mechanical structure requirements are more and more simplified, and fewer transmission components are required, especially as the parts of the transmission case are less and less, the mechanical transmission is mostly driven directly, and the transmission parts are The precision requirements are very high, which puts higher demands on the process performance of the horizontal boring and milling machine. Therefore, as a conventional boring-axis structure, the number of objects to be processed is decreasing, and it will be replaced by a stern-free shaft type electric spindle, that is, a high-speed machining center is used to complete various parts. The horizontal boring and milling machine develops into a high-speed machining center. On the one hand, the process adaptability is stronger. On the other hand, the performance level and machining accuracy are also improved. While the processing range is increased, various functional accessories are required for process guarantee. Boring and milling, it can drill and tap, install the CNC angle milling head attachment, and also process various curved body parts. Equipped with an exchange table to form a flexible machining unit for batch processing of parts. The floor-standing milling and boring machine mainly processes large and super-large parts of various profiles. Its craftsmanship is characterized by a large floor-standing platform (the size of the worktable is not limited), which can process ultra-long, ultra-wide parts. At the same time, it can also be equipped with a rotary table, which can be used for rotary indexing, and can also be used for radial linear motion. The multi-order machining of parts is completed by indexing, which greatly improves the process range. Now, the floor-standing milling and boring machine produced by Pama Italy is equipped with a tilt-adjustable angle table to further expand the processing range. The high-power and high-efficiency cutting is a major processing advantage of the floor-type milling and boring machine. The high-speed and high-precision technical requirements have more and more affected the technical development of the floor-standing milling and boring machine, and it is an important means to improve the level of the floor-standing milling and boring machine. Therefore, the floor-standing milling and boring machine is changing a single high-power, high-efficiency cutting, and more into the high-speed, high-precision process technology connotation. Nowadays, the ram structure is the main structural type that has been processed for high-speed milling. The ram has a large cross section, high rigidity, high-speed running stability, and it is easy to install various milling head accessories for high-speed machining. development trend The development of heavy-duty machine tools will present two major trends. On the one hand, it is technically oriented to the processing center or large flexible processing unit and large-scale combined multi-machining machine tool. Among them, the horizontal boring and milling machine will be gradually replaced by high-speed machining center and flexible processing unit; floor-type milling and boring machine to develop large-scale The combined composite machining center is mainly composed of two or more mainframes combined into a composite machining machine to adapt to the single-piece small-scale production of large-scale machined parts. The process is complicated, the auxiliary time and the processing cycle are long, often consisting of one. It is very difficult for the machine to complete all the machining processes, but it can be realized by two combined machining centers. For example, two CNC gantry boring and milling machines form a composite machining center, and share the bed and guide rails, respectively, with a rectangular table and a rotary table (indexing) for boring and milling; a floor-type milling and boring machine A CNC single-column vertical car forms a large-scale composite machining center, sharing the bed rails, with a landing platform and a rotary table, which can complete the machining of the car, boring, milling, drilling, etc. The turret can be indexed. There are also two combinations of large-scale floor-milling and boring machines sharing bed rails. This saves floor space, reduces costs, and increases processing efficiency. Another development trend is to pursue refined manufacturing, improve the process content of equipment manufacturing, and reflect the safety, environmental protection and humanization characteristics of machine tools. In summary, the development of contemporary horizontal boring and milling machines and floor-type milling and boring machines is very fast, mainly reflected in the renewal of design concepts and the improvement of machine tool speed and manufacturing process level. On the other hand, the machine tool structure changes greatly. The application of new technologies is endless. The structure of the horizontal boring and milling machine develops toward the high-speed electric spindle, and the floor-type milling and boring machine develops toward the ram-type (without boring axis) structure. The functional accessories are developed in a high-speed, multi-axis linkage and structural type, which will be A new trend in technology development in the coming period. 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