CNC turn-mill centers – find manufacturers and suppliers

CNC turn-mill centers combine the capabilities of CNC lathes with those of CNC milling machines, enabling the production of parts with complex geometries in a single set-up.

These machines make it possible to produce both rotationally symmetrical workpieces, as with CNC lathes, and non-symmetrical or complex structures by milling.

Below you will find the operating principle and types as well as the main components of CNC turn-mill centers, areas of their use and their advantages:

How CNC turn-mill centers work

1. During turning, the workpiece rotates while the tool remains stationary or moves along the axis. Turning is ideal for producing rotationally symmetrical parts such as shafts, cylinders or screws. The rotating workpiece is machined by a cutting tool that is controlled along the X and Z axes to remove material.
2. During milling, the tool moves while the workpiece either rotates or remains stationary. This allows grooves, holes or complex geometric shapes to be created. The tool can be controlled in multiple axes (X, Y, Z and rotary axes), which is particularly advantageous for complex shapes and contours that would not be possible with turning alone.

Types of CNC turning-milling centers:

1. Single-spindle machines:
   Here, the workpiece is machined in one spindle, which is sufficient for smaller and medium-sized components.
2. Multi-spindle machines:
   These machines have multiple spindles that can perform different machining operations on multiple workpieces simultaneously, which increases productivity.
3. 5-axis turn-mill centers:
   These machines offer particularly high flexibility and precision, as they can move along five axes, which enables the machining of very complex geometries.

Main components of CNC turn-mill centers:

1. Spindle:
   This is where the workpiece is clamped and set in rotation. It is essential for the turning process.
2. Milling head:
   This contains the milling spindle that sets the milling tool in rotation, which thereby removes material. The milling head can move in several axes.
3. Tool turret:
   An automatic tool changer that holds various cutting tools for different machining operations.
4. CNC control:
   The central control unit that processes and controls the commands for all the machine's movements and tools.
5. Coolant and lubricant system:
   Cools the tools during the machining process and extends tool life.

Use of CNC turn-mill centers:

CNC turning-milling centers are primarily used in industries where complex and precise components are required. Typical areas of application are:

1. Automotive industry:
Production of precision parts such as crankshafts, axles, engine parts and housings.

2. Aerospace:
Machining of complex turbine components, fasteners and housings that require both turning and milling operations.

3. Medical technology:
Manufacturing implants, surgical instruments and prosthetic parts with high precision.

4. Mechanical engineering:
Production of components such as couplings, gears, bearings and other machine components.

5. Electronics industry:
Production of connectors, housings and small components with high precision.

Advantages of CNC turn-mill centers:

• Both rotationally symmetrical and complex non-symmetrical components can be manufactured in a single set-up, saving time and increasing machining accuracy.
• By combining the machining steps in one machine, errors caused by reclamping the workpiece are avoided, resulting in greater precision.
• As several machining steps are completed in a single pass, the machining time is significantly reduced, resulting in higher quantities and lower costs per part.
• CNC turn-mill centers offer great flexibility as they are able to produce a variety of different geometries in a single operation.
• The ability to combine different milling and turning tools in one machine reduces the number of machines and tools required.

CNC turn-mill centers offer an effective solution for the combined machining of complex workpieces, as they combine turning and milling operations in a single machine. The versatility of these machines makes them an indispensable technology in modern manufacturing, especially in industries that require precise and complex components.

Below you will find an overview of the most important criteria you should look out for when buying CNC turn-mill centers:

When purchasing CNC turn-mill centers, there are numerous factors that should be considered to ensure that the machine meets specific requirements and is a profitable long-term investment.

• Before purchasing a CNC turn-mill center, it should be clear what machining tasks are involved and what type of workpieces are to be produced. Considerations include:
• What material will mainly be machined (metal, plastic, wood, etc.)? Some machines are better suited to hard materials, while others are designed for softer materials.
• Are complex or simple parts required? Machines with more axes offer greater flexibility and can process complex geometries in a single pass.
• The dimensions of the workpieces determine how large the working area of the machine needs to be. There should be enough space for the largest workpiece that needs to be machined.
• The number of axes determines the flexibility and versatility of the machine:
• 3-axis: basic machining operations (turning and simple milling) are possible. These machines are suitable for less complex tasks.
• 4- and 5-axis: These offer the possibility of machining the workpiece from different angles and producing complex geometries. More axes are particularly advantageous for workpieces that have to be machined on several sides.
• The performance of the main spindle determines how much material can be removed per unit of time. A higher spindle power is required for milling and turning hard materials (e.g. stainless steel).
• The speed range of the spindle is important for processing different materials. Higher speeds are suitable for softer materials and finer milling work, while lower speeds are used for harder materials.
• The number of tools that the machine can accommodate is crucial for the flexibility of the manufacturing process. More tools enable the production of complex parts without constant manual changing.
• An automatic tool changer improves efficiency by automatically switching between the required tools during machining. This saves time and reduces the susceptibility to errors.
• The precision of a CNC turning/milling center is one of the most important factors. The following points should be noted here:
• Positioning accuracy: Indicates how precisely the machine can move to a specific position.
• Repetition accuracy: Shows how precisely the machine can perform the same process again and again. These values are particularly important when producing parts in series.
• The CNC control system is the heart of the machine. It determines how intuitively and flexibly the machine can be operated. Considerations include:
• Ease of use: the control system should be easy to learn and operate, especially if multiple operators with varying levels of experience are using the machine.
• Software compatibility: The machine should be compatible with common CAD/CAM programs to optimize the design and manufacturing process.
• Remote monitoring and diagnostic tools: Modern machines often have remote monitoring capabilities that show the condition of the machine and potential problems in real time.
• The design of the machine must be sufficiently stable to minimize vibrations and deviations during the machining process. High rigidity ensures:
• Greater precision during machining, especially with hard materials or high cutting forces.
• Longer tool life, as stable machines generate less vibration and therefore protect the tools.
• The coolant and lubrication system is essential to prevent overheating and extend tool life. Make sure that:
• Efficient cooling is provided, especially when machining metals that heat up quickly.
• Automatic lubrication is available for guides and spindles to reduce maintenance and extend the service life of the machine.
• If high volumes or continuous production is the goal, automation features are critical:
• Robot-assisted loading: some machines can be integrated with robots or automatic workpiece feeding systems to automate the loading and unloading process.
• Interlinking with other machines: If the machine is part of a larger production line, it should be able to be integrated into it to ensure a seamless material flow.
• It is important that spare parts are readily available to avoid long downtimes.
• The manufacturer should offer reliable technical support and training programs for operators. Good training minimizes errors and increases efficiency.
• Maintenance requirements vary depending on the design and model. Machines that are designed for easy maintenance save time and money in the long term.
• Energy consumption can be considerable, especially with large machines. An energy-efficient machine reduces running costs.
• Cost of consumables: This includes tool wear, coolants, lubricants and other consumables that need to be replaced regularly.
• Acquisition costs vary greatly depending on the size, complexity and manufacturer of the machine. It is important to compare the budget with the requirements.
• In addition to the purchase costs, the long-term operating costs, maintenance costs and possible downtimes should be taken into account.
• Many machine manufacturers offer financing or leasing options that can make a purchase easier.

A well-thought-out selection that takes these factors into account ensures that the CNC turn-mill center meets the requirements and represents a profitable investment in the long term.

CNC turn-mill centers can be purchased from various suppliers. You will find comprehensive information on manufacturers and suppliers of CNC turn-mill centers around the world on Exportpages.