What are the benefits of CNC turning and milling composite machine tools?
The motion of the turning milling composite machining machine tool includes four basic movements: milling cutter rotation, workpiece rotation, milling cutter axial feed, and radial feed. According to the different relative positions of the workpiece rotation axis and the tool rotation axis, turning milling composite machining can be mainly divided into axial turning milling machining, orthogonal turning milling machining, and general turning milling machining.
Compared with conventional CNC machining processes, the outstanding advantages of turning milling composite machining are mainly manifested in the following aspects:
The compound CNC machine tool for turning and milling refers to a machine tool that can perform both turning and milling tasks, serving as both a lathe and a milling machine. The car milling composite machine was first used to process propellers, mainly to avoid accuracy loss and benchmark loss caused by secondary clamping!
CNC turning and milling composite machine tool is a main type of composite machining machine tool, which not only has the functions of CNC lathe, but also can complete flat milling, drilling, tapping, straight groove, spiral groove and milling teeth, etc. It has composite functions such as turning, milling, and boring, and can achieve the machining concept of one-time clamping and complete completion. It is one of the most rapidly developing processing methods in recent years.
Generally speaking, compound turning and milling machine tools need to have the following two characteristics:
1. The spindle motor adopts a servo motor, and the rotational motion of the spindle can be linked with the feed motion.
2. In addition to configuring the turret tool holder for CNC lathes, at least power cutting tools should also be configured, or an independent power tool holder should be configured.
Compared to individual CNC lathes and milling machines, the combination of turning and milling has the following major advantages:
Shorten the product manufacturing process chain and improve efficiency
The CNC turning and milling composite center can install various special cutting tools, with a new type of tool arrangement that reduces tool changing time and improves machining efficiency. It can achieve one-time clamping to complete all or most of the machining processes, greatly shortening the product manufacturing process chain. On the one hand, this reduces the production auxiliary time caused by card loading changes, while also reducing the manufacturing cycle and waiting time of tooling and fixtures, which can significantly improve production efficiency.
Reduce clamping frequency and improve machining accuracy
The reduction in card loading frequency avoids the accumulation of errors caused by positioning benchmark conversion. At the same time, most of the current turning and milling composite processing equipment has the function of online detection, which can achieve in situ detection and accuracy control of key data in the manufacturing process, thereby improving the processing accuracy of products; The high-strength integrated bed design enhances the gravity processing ability for difficult to cut materials
When turning and milling, the tool performs intermittent cutting, which can achieve relatively short cutting for any workpiece formed by any material and is easy to automatically remove chips. And intermittent chip cutting can provide sufficient time for the tool to cool, reduce the thermal deformation of the workpiece, and also improve the service life of the tool. Compared with traditional CNC machine tools, turning and milling has a higher rotational speed, better cutting product quality, and reduces cutting force, improving the accuracy of thin-walled and slender rods, resulting in higher workpiece forming quality.
Due to the fact that 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, increasing the rotation speed of the tool and reducing the rotation speed of the workpiece can also achieve the same processing effect. This feature is particularly effective for the processing of large forging blanks, because reducing the speed of the forging blank can eliminate the vibration or periodic changes in radial cutting force caused by workpiece eccentricity, thereby ensuring smooth cutting of the workpiece and reducing errors in workpiece processing.
When turning and milling composite machine tools process workpieces, a low rotational speed can effectively reduce the centrifugal force of the workpiece, avoid deformation of the workpiece, and improve the machining accuracy of the parts. The use of larger longitudinal feed in turning and milling can also achieve precise cutting, and surface roughness can be effectively guaranteed. Turning and milling composite machine tools can use different methods such as turning, milling, drilling, and boring to achieve workpiece processing. Workpieces can also be clamped in one go to complete multi face machining tasks, ensuring machining accuracy.
Reduce footprint and save production costs
The compact and aesthetically pleasing exterior design improves space utilization, making maintenance and repair more convenient and maximizing customer satisfaction; Although the single unit price of turning and milling composite processing equipment is relatively high, due to the shortening of the manufacturing process chain and the reduction of equipment required for the product, as well as the reduction of the number of fixtures, workshop area, and equipment maintenance costs, it can effectively reduce the overall investment in fixed assets, production operation, and management costs.
