FRF

Gantry Machining Center FRF

FRF – portal CNC machine by TOS Kuřim

The gantry machining center FRF is designed for precise machining of large and geometrically complex workpieces. The machine is especially suitable for milling complicated shapes in the manufacture of moulds, press tools, dies, and large structural components requiring simultaneous 5-axis machining.

It supports continuous control in three linear axes and two rotary axes, enabling efficient machining of complex geometries in a single setup.

Design and machine concept

The gantry machining center FRF is based on a rigid portal design with a fixed table. The gantry, consisting of two columns connected by a cross rail, moves along both sides of the table.

This configuration provides:

• efficient utilisation of the working area
• minimal floor space requirements
• high structural rigidity during machining
• stable tool positioning across the entire workspace

As a result, the machine ensures consistent accuracy even when machining large and heavy workpieces.

Motion axes and machining capabilities

The machine is designed for advanced multi-axis machining. It enables continuous control of:

• three linear axes (X, Y, Z)
• two rotary axes for complex spatial machining

This configuration allows machining of:

• moulds and dies
• press tools
• complex freeform surfaces
• large structural components

The machine parameters allow machining of a wide range of materials, including alloy steels and light metal alloys.

Spindle head and configuration

The machine is equipped with a vertical headstock designed for flexibility in machining operations.

Depending on configuration, the machine can be supplied with:

• automatic clamping system for interchangeable spindle heads
• fixed spindle head for dedicated operations

This allows adaptation to different machining requirements and production strategies.

Table design and workpiece clamping

The working table forms the base of the machine and also serves as the guide for column movement.

Key features of the table:

• rigid cast iron construction
• modular design with extendable sections
• T-slots for secure workpiece clamping
• capability to clamp large and heavy workpieces

Hardened guideway strips are mounted on both sides of the table, ensuring precise longitudinal movement in the X-axis. The axis is protected by telescopic covers mounted on both the table and the column.

Accuracy and operating conditions

The gantry machining center FRF is designed to operate under defined environmental conditions according to industrial standards.

Recommended operating conditions include:

• ambient temperature between +17 °C and +25 °C
• temperature variation within 24 hours below 4 °C
• temperature gradient below 0.5 °C per hour

Standard operating range:

• temperature from +15 °C to +35 °C
• air pressure above 90 kPa

Maintaining these conditions ensures optimal machining accuracy and long-term stability.

Industrial applications

The gantry machining center FRF is widely used in industries requiring high precision and large machining capacity, such as:

• aerospace engineering
• railway and transportation industry
• energy sector (turbine components)
• heavy engineering
• tool and die manufacturing

Installation and operation

The machine is intended for installation in industrial facilities with sufficient floor load capacity. Proper foundation and precise leveling are required for optimal performance.

Delivery includes:

• transport and installation
• machine commissioning
• operator training
• technical documentation

Service and support

The machine is supplied as new equipment with full lifecycle support, including:

• warranty and post-warranty service
• spare parts supply
• technical consultancy
• long-term service support