The movement of the turning-milling compound processing machine tool includes four basic movements: milling cutter rotation, work piece rotation, milling cutter axial feed and radial feed. According to the relative position of the work piece rotation axis and the tool rotation axis, the turning-milling combined processing can be divided into axial turning-milling processing, orthogonal turning-milling processing and general turning-milling processing.
Compared with conventional CNC machining processes, the outstanding advantages of CNC turning and milling are mainly manifested in the following aspects:
The CNC turning and milling machine tool refers to a machine tool that can perform both turning and milling, and can be used as both a lathe and a milling machine. The turning-milling compound machine was first used to process propellers, mainly to avoid the loss of precision and reference loss caused by the second clamping!
The CNC turning and milling compound machine tool is a main model of the compound processing machine tool. In addition to the functions of the CNC lathe, it can also complete surface milling, drilling, tapping, straight groove, spiral groove and milling, etc. with turning, milling and composite functions such as boring can realize the processing concept of one clamping and complete completion. It is one of the most rapidly developing processing methods in recent years.
① The spindle motor adopts a servo motor, and the rotation movement and feed movement of the spindle can be linked.
② In addition to the turret tool post of the CNC lathe, at least a power tool or an independent power tool post should be configured.
① Shorten the product manufacturing process chain and improve efficiency
The CNC turning and milling compound center can be equipped with a variety of special tools, new-type tool arrangement, reduce tool change time, improve processing efficiency, can complete all or most of the processing procedures in one clamping, thereby greatly shortening the product manufacturing process chain. This way, on the one hand, the production assistance time caused by the change of the installation card is reduced, and the manufacturing cycle and waiting time of the tooling fixture are also reduced, which can significantly improve the production efficiency.
② Reduce the number of clamping and improve processing accuracy
The reduction in the number of card loading avoids the accumulation of errors due to the conversion of positioning benchmarks. At the same time, most of the current turning-milling composite processing equipment has the function of online detection, which can realize the in-position detection and precision control of key data in the manufacturing process, thereby improving the processing accuracy of the product; the high-strength integrated bed design improves the difficulty gravity machining ability of cutting materials.
During turning and milling, the tool performs intermittent cutting, which can obtain relatively short cuts for work pieces formed of any material, and is easy to automatically remove chips. In addition, the intermittent chips can allow the tool to have sufficient time to cool down, reduce the thermal deformation of the work piece, and can also increase the service life of the tool. Compared with the traditional CNC machine tools, the turning and milling process has a higher speed, the quality of the cut products is better, and the cutting force is reduced, the accuracy of thin-walled rods and slender rods is improved, and the quality of work piece forming is high.
Since the cutting speed can be decomposed into the rotation speed of the work piece and the rotation speed of the tool, according to the mechanical characteristics, the same processing effect can be achieved by increasing the rotation speed of the tool and reducing the rotation speed of the work piece. This feature is particularly effective for the processing of large forgings, because the reduction of the forging blank speed can eliminate the vibration or the periodic change of the radial cutting force caused by the eccentricity of the work piece, thereby ensuring the smooth cutting of the work piece and reducing the error in the processing of the work piece.
When the turning and milling compound machine tool is processing the work piece, the low rotation speed of the work piece can effectively reduce the centrifugal force of the work piece, avoid the deformation of the work piece, and help improve the machining accuracy of the part. Large longitudinal feed can be used in the turning and milling process to obtain precise cutting, and the surface roughness can also be effectively guaranteed. The turning and milling compound machine tool can use different methods such as turning, milling, drilling and boring to realize the processing of the work piece. It can complete multi-face machining tasks with one clamping and ensure machining accuracy.
③ Reduce floor space and save production cost
The compact and beautiful appearance design improves the use of space, and makes maintenance and repair more convenient to maximize customer satisfaction; although the single unit of turning and milling processing equipment is relatively expensive, due to the shortening of the manufacturing process chain and the reduction of equipment required for products, and the reduction of the number of fixtures, workshop area and equipment maintenance costs can effectively reduce the overall fixed asset investment, production operation and management costs.