CNC turn-milling combined machine refer to CNC machine tools that can complete both turning and milling. The machine was first used to process propellers, mainly to avoid the loss of precision and baseline caused by 2 times of clamping.
CNC turn-milling combined machine is one of the main models of compound machine tools. In addition to the functions of CNC lathe, it can also perform planar milling, drilling, tapping, straight groove, spiral groove and gear milling. With turning, milling and boring and other composite functions, can realize the processing concept of one-time clamping and complete finishing. It is one of the fastest growing processing methods in recent years.
General CNC turn-milling combined machines have the following two characteristics:
1. The spindle motor adopts servo motor, and the rotary motion of the spindle and the feed motion can be linked.
2. In addition to configuring the turret of the CNC lathe, configure at least the power tool or configure a separate power tool holder.
Compared with ordinary lathes, the CNC turn-milling combined machine has also the following advantages:
CNC turn-milling machine center can install a variety of special tools, new tool arrangement can reduce tool change time and improve processing efficiency, can achieve all or most of the processing steps in one clamping, thus greatly shortening the product manufacturing process chain. This reduces the production assistance time due to the change of the loading clamping, and also reduces the manufacturing cycle and waiting time of the tooling fixture, which can significantly improve the production efficiency.
Reduce clamping times and improve machining accuracy.
The reduction in clamping times avoids the accumulation of errors due to the conversion of the positioning reference. At the same time, most of the current CNC turn-milling combined processing equipments have 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 precision of the products; the high strength integrated machines design improved the gravity processing ability of difficult cutting materials.
During turning and milling, the tool performs intermittent cutting, which enables shorter cutting of workpieces formed from any material and is easy to automatically remove chips. And intermittent cutting allows the tool to have sufficient time to cool, which can reduce the thermal deformation of the workpiece, and improve the life of the tool. Compared with the traditional CNC machines, the speed of CNC turn-milling combined machine is higher, the quality of the finished products is better, the cutting force is reduced, the precision of the thin-walled rods and the elongated rods is improved.
Since the cutting speed can be decomposed into the rotation speed of the workpiece and the rotation speed of the tool, according to the mechanical characteristics, the same machining effect can be achieved by increasing the rotation speed of the tool and reducing the rotation speed of the workpiece. This feature is especially suitable for the processing of large forging blanks. Because the speed of the forging blank can reduce the vibration caused by the eccentricity of the workpiece, thus ensuring the smooth cutting of the workpiece and reducing the error in the machining of the workpiece.
When the turn-milling combined machine is used to machining the workpiece, the low rotation speed of the workpiece can effectively reduce the workpiece centrifugal force and avoid deformation, which is beneficial to improve the workpiece machining accuracy. The use of large longitudinal feeds in turn-milling combined machine can also result in precise cutting and surface roughness can be effectively guaranteed.