In machining centers, the facing head is also known as a U-axis tool.

A machining center’s rotary table, also called a U-axis tool, is used.

The U-axis generally refers to an axis parallel to the machine tool’s X-axis. U-axis tools can perform real-time CNC diameter changes along the U-axis, enabling machining centers and other machine tools to complete machining operations previously only possible on lathes.

CNC rotary tables and CNC variable-diameter boring heads (also called U-axis tools) are used on horizontal boring and milling machines, floor-type boring machines, machining centers with telescopic axes, and various special-purpose machine tools to perform variable-diameter boring operations on housings, structural parts, and other complex parts. Widely used in the following industries:

1. Aerospace;

2. Valve manufacturing, hydraulic fluid control;

3. Shipbuilding and heavy industrial equipment;

4. Energy, petrochemical, and other major equipment manufacturing fields; Unlike ordinary boring tools, CNC rotary tables and variable diameter boring heads (also known as U-axis tools) can change the cutting diameter in real time during machining.

Features and advantages of CNC rotary tables and CNC variable diameter boring heads (U-axis tools):

1. Fully CNC controlled: While the spindle rotates, the tool can be CNC controlled radially, allowing for real-time diameter change during machining. Therefore, it can perform high-precision machining of curved and spherical surfaces and can process complex surfaces. 1. The hub bore is a bottle-shaped cavity, narrow at both ends and wide in the middle.

2. One CNC rotary table and a CNC variable-diameter boring head are equivalent to the machining capacity of countless boring tools. Whether the user is designing a new product or improving an existing one, adjustments can be made by rewriting the machine tool program to adapt to new machining requirements without the need to purchase additional tools, thus saving tooling costs.

3. The system has several fixed connection methods to ensure easy connection with and interchangeability between machine tools.

4. Due to CNC control and the requirement for only one tool setting, tool changing and auxiliary operation time are greatly reduced, improving machining accuracy and production efficiency.

Machine tool requirements for CNC rotary boring machines and CNC variable-diameter boring heads (U-axis tools):

The machine tool must have a programmable control axis, generally the W-axis.

Generally applicable to boring and milling machines, machining centers, and special-purpose machines with a W-axis telescopic axis!

Working principle of CNC rotary boring machines and CNC variable-diameter boring heads:

The extension and retraction of the boring bar is converted into the horizontal displacement of the tool through a precision mechanism within the rotary boring machine via a CNC program; the axial displacement of the tool is achieved through the movement of the ram or the worktable.

Types of parts that CNC rotary boring machines and CNC variable-diameter boring heads can machine:

1. Boring conical surfaces, cylindrical surfaces, and multi-diameter profiles with different diameters;

2. Automatic machining of complex geometric profiles, such as tapered holes, complex profile variable-diameter holes, such as cavities with an inner profile diameter larger than the opening diameter (bottle cavity boring);

3. Back boring and reverse end face boring, chamfering, radial grooving and end face grooving, threading, etc.;