Application of the hottest modular machine tool in

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Application of modular machine tools in small and medium-sized batch production

modular machine tools are semi-automatic or automatic special machine tools based on general components and equipped with special components and fixtures designed according to the specific shape and processing technology of workpieces according to the implementation opinions of Tongling hope project for small and medium-sized enterprises

modular machine tools generally adopt the mode of simultaneous processing of multiple axes, multiple knives, multiple processes, multiple surfaces or multiple stations, and the production efficiency is several times to dozens of times higher than that of general-purpose machine tools. As the general components have been standardized and serialized, they can be flexibly configured according to needs, which can shorten the design and manufacturing cycle. Therefore, modular machine tools have the advantages of low cost and high efficiency. They are widely used in mass production and can be used to form automatic production lines

modular machine tools are generally used to process box parts or parts with special shapes to ensure product quality, and parts with one characteristic between batches. During processing, the workpiece generally does not rotate, and drilling, reaming, spot faceing, reaming, boring, milling plane, cutting internal and external threads, and machining excircles and end faces are realized by the rotation movement of the tool and the relative feed movement of the tool 1 and the inlet proximity switch of the belt retention testing machine and the workpiece. Some modular machine tools use the turning head to hold the workpiece and make it rotate, and the cutter makes the feed motion. It can also realize the machining of the outer circle and end face of some rotary parts (such as flywheel, automobile rear axle shaft, etc.)

since the 1970s, with the development of indexable cutters, dense tooth milling cutters, automatic boring size detection and cutter automatic compensation technology, the machining accuracy of modular machine tools has also been improved. The flatness of the milling plane can reach 0.05 mm/1000 mm, and the surface roughness can be as low as 2.5 ~ 0.63 microns; The boring accuracy can reach it7 ~ 6, and the hole spacing accuracy can reach 0.03 ~ 0.02 microns

special machine tools have developed with the rise of the automotive industry. In special machine tools, some parts have gradually developed into general parts due to repeated use, thus generating modular machine tools

the first modular machine tool was made in the United States in 1911, which was used to process automobile parts. At the beginning, each machine tool manufacturer had its own general component standards. In order to improve the interchangeability of general components of different manufacturers and facilitate the use and maintenance of users, Ford Motor Company and general motors company of the United States negotiated with machine tool manufacturers of the United States in 1953 to determine the principle of standardization of general components of modular machine tools, that is, strictly stipulate the connection dimensions between components, but not the structure of components

general components can be divided into five categories according to their functions: power components, support components, conveying components, control components and auxiliary components. Power components are components that provide main motion and feed motion for modular machine tools. There are mainly power boxes, cutting heads and power slides

the supporting parts are the parts used to install the power slide, cutting head or fixture with feeding mechanism, including side base, middle base, support, adjustable support, column and column base. It is suitable for rapid and nondestructive qualification inspection of seamless steel pipes

conveying parts are parts used to convey workpieces or headstock to the processing station, mainly including indexing rotary table, annular indexing rotary table, indexing drum and reciprocating table

control components are components used to control the automatic working cycle of machine tools, including hydraulic stations, electrical cabinets, consoles, etc. Auxiliary components include lubrication device, cooling device, chip removal device, etc

in order to apply modular machine tools in small and medium-sized batch production, it is often necessary to apply group technology to process parts with similar structure and process on one modular machine tool, so as to improve the utilization rate of machine tools. There are two common types of machine tools, replaceable spindle box modular machine tools and turret modular machine tools

in the future development of modular machine tools, speed regulating motors and ball screws will be used more to simplify the structure and shorten the production pace; Adopt digital control system and automatic replacement system of headstock and fixture to improve process adjustability; And incorporated into flexible manufacturing system

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