Turning and milling center
In order to improve the machining efficiency and accuracy of complex shaped products, processors have been seeking more efficient and precise machining process methods. The emergence of mill-turn machining equipment provides an effective solution to improve the machining accuracy and efficiency of aerospace parts.
Machining efficiency and precision are the eternal goals pursued in the field of metal processing. With the continuous development of CNC technology, computer technology, machine tool technology and machining process technology, the traditional machining concept can no longer meet people's requirements for machining speed, efficiency and precision. In such a context, composite machining technology has come into being. Generally speaking, composite machining is a general term for the machining technology that can complete different processes or different process methods on one machining equipment. Composite machining technology is mainly manifested in 2 different types, one is the composite of different machining methods based on energy or motion mode; the other is the composite based on the principle of process concentration and mainly mechanical machining process, turning and milling composite machining is one of the most rapidly developing machining methods in this field in recent years.
The parts of aviation products are highlighted as multi-species and small batch, complex process, and widely use the whole thin-walled structure and difficult to machine materials, so there are generally long manufacturing cycle, large material removal, low processing efficiency and serious processing deformation bottlenecks in the manufacturing process. In order to improve the processing efficiency and processing accuracy of complex aviation products, processors have been seeking more efficient and precise processing methods. The emergence of mill-turn machining equipment provides an effective solution to improve the machining accuracy and efficiency of aerospace parts.
The motion of the turning and milling complex machining machine includes four basic motions: milling tool rotation, workpiece rotation, axial feeding of the milling tool and radial feeding. According to the workpiece rotation axis and tool rotation axis relative to the position of different, turning and milling machining can be divided into axial milling, orthogonal milling and general turning and milling. Among them, axial turning and milling and orthogonal turning and milling are the two most widely used turning and milling methods. Axial turning and milling can machine not only the outer cylindrical surface but also the inner bore surface because the milling tools are parallel to the rotation axis of the workpiece. Orthogonal turning and milling can not machine the inner bore when the diameter of the inner bore is small because the milling tool is perpendicular to the axis of rotation of the workpiece, but it is more efficient in machining the outer cylindrical surface because the longitudinal stroke of the milling tool is not limited and a larger longitudinal feed can be used.
Compared with conventional CNC machining process, the outstanding advantages of turning and milling machining are mainly in the following aspects.
（1）Shorten the product manufacturing process chain and improve production efficiency. A variety of special tools can be installed, a new type of tool arrangement, reduce tool change time, improve machining efficiency, turning and milling composite machining can achieve a clamping to complete all or most of the machining process, thereby greatly shortening the product manufacturing process chain. This on the one hand reduces the production auxiliary time due to the change of loading card, and at the same time also reduces the manufacturing cycle and waiting time of tooling and fixtures, which can significantly improve the production.
(3) Reduce floor space and production cost. The compact and beautiful shape design improves the use of space and makes maintenance and repair more convenient so that customers can get maximum satisfaction; although the single unit price of the turning and milling machine is relatively high, but due to the shortening of the manufacturing process chain and the reduction of the equipment required for the product, as well as the reduction of the number of fixtures, workshop floor space and equipment maintenance costs, can effectively reduce the overall investment in fixed assets, production operation and management. cost.