CNC Machining:The Characteristics of Multi-Axis Machining in CNC Machining Parts

As the basis of modern mechanical manufacturing technology, CNC machining technology has undergone major changes in the manufacturing process of CNC machining parts. Compared with traditional numerical control processing technology, modern numerical control processing technology has obvious differences in processing process, process control, processing equipment, processing equipment and so on.

The CNC machine tool we are familiar with has three linear axes of XYZ, and multi-axis refers to the fourth axis on at least one machine. The so-called multi-axis CNC machining refers to more than four-axis CNC machining, typically five-axis CNC machining. Titanium machine is the main product of our company. The main products include screw top, screw, shaft machining, CNC lathe machining, handle, wheel hub machining, etc. Multi-axis processing should be multi-coordinate linkage processing. This device can realize five-axis linkage.

CNC multi-axis milling is suitable for CNC machining parts with high precision and complex requirements. Multi-axis machining can realize four-axis or multi-axis control combining CNC milling, CNC boring and CNC drilling. After one-step clamping processing, milling, boring and multi-process processing on the surface of CNC machined parts can effectively avoid Positioning errors caused by multiple assemblies. The CNC machining process is shortened, and the accuracy of CNC machining parts is improved.

CNC machining centers are generally divided into vertical machining centers and horizontal machining centers. Three-axis vertical CNC machining center is the most effective CNC machining part surface. The horizontal CNC machining center can only use the turntable to complete the four-side machining of the workpiece. The multi-axis CNC machining center has the characteristics of high efficiency and high precision.

The CNC machining parts can be clamped to complete the machining of 5 curved surfaces. If equipped with a five-axis linkage high-end CNC system, it can also CNC process complex and high-precision space surfaces, which is very suitable for forming molds for auto parts, aircraft structural parts and other workpieces. According to the form of the rotating shaft, the multi-axis CNC machining center can be divided into two settings.

(1) Rotation axis of worktable.

The advantages of this multi-axis CNC machine tool are: the spindle structure is relatively simple, the spindle rigidity is good, and the manufacturing cost of CNC machining parts is low. However, the ordinary worktable cannot be designed too large, and the load capacity is also small, especially when the rotation angle of the A axis is ≥90°, the CNC machined parts will produce a large bearing torque during cutting.

(2) The vertical spindle head rotates.

The advantage of this kind of multi-axis CNC machine tool is that the spindle CNC machining is very flexible, and the worktable can also be designed to be very large. When using a spherical milling cutter to machine the surface of a part, when the center line of the tool is perpendicular to the machined surface, the surface quality of the CNC machined part cut by the apex is poor due to the linear velocity of the apex of the spherical milling cutter.

The spherical milling cutter processes the workpiece at an angle relative to the CNC machined parts, avoiding the cutting of the tool tip, ensuring a certain linear speed, and improving the surface quality of the CNC machined parts. This is very difficult for the worktable rotating machining center.

The characteristic of multi-axis CNC machining is that multi-axis CNC machining has the following characteristics:

(1) Reduce the benchmark conversion and improve the accuracy of CNC machining parts. The integration of the multi-axis CNC machining process not only improves the efficiency of CNC machining, but also because the CNC machining parts need to be clamped once during the entire machining process, the accuracy of the CNC machining is easier to be guaranteed.

(2) Reduce the number and footprint of fixtures. Although the price of a unit in a multi-axis CNC machining center is high, the number of fixtures, workshop area and equipment maintenance costs are reduced due to the shortening of the CNC machining chain and the reduction of the number of equipment.

(3) Shorten the production process chain of CNC machining parts and simplify production management. The complete CNC machining of multi-axis CNC machine tools greatly shortens the production process chain. Since the machining task is only handed over to one workpiece, it not only simplifies production management and scheduling, but also significantly improves transparency.

The more complex the CNC machining parts, the more obvious its advantages. As the production process chain of CNC machining parts is shortened, the number of CNC machining parts is inevitably reduced, thereby simplifying production management, thereby reducing production operation and management costs.

(4) Shorten the new product development cycle. For aerospace, automotive and other companies, some new CNC machining parts and forming molds have complex shapes and high precision. Therefore, a multi-axis CNC machining center with high flexibility, high precision, high integration and complete CNC machining capabilities can be used. It solves the precision and cycle problems of complex CNC machined parts in the process of new product development, greatly shortens the development cycle, and improves the yield rate of CNC machined parts.