VMC & CNC Machine Work Tables

CNC Machine Work Tables

• CNC Machines: CNC machines can be vertical, horizontal, or multi-axis, and they are used for tasks like milling, drilling, turning, and grinding. The machine’s movements are controlled by a computer system based on pre-programmed instructions.

• Work Tables: The work table in a CNC machine provides the surface where the part or workpiece is clamped and secured during the machining process. The size, design, and functionality of the work table depend on the type of CNC machine and the work it is intended to perform. These tables often come with a T-slot design, allowing for the easy installation of clamps, vices, or fixtures to secure the workpiece.

  Key Features:

  • Material: Typically made of cast iron or steel, the table needs to be sturdy to absorb vibrations during machining.
  • Precision: CNC machines, especially vertical machining centers, demand high precision from the work table to ensure the final part meets the required specifications.
  • Modular Design: Some CNC machines offer modular worktables, allowing for easy adjustment and adaptability for different workpiece sizes.

VMC (Vertical Machining Center) Work Tables

• VMC Machines: VMCs are a type of CNC machine where the spindle is oriented vertically, which makes them ideal for tasks like drilling, milling, and tapping. They are commonly used for high-precision parts in industries like aerospace, automotive, and metalworking.

• Work Tables: The VMC work table is positioned below the vertically oriented spindle. The table may be equipped with T-slots for clamping workpieces, or it might be integrated with a pallet system for automation in high-volume operations.

  Key Features:

  • Size and Capacity: VMC work tables are available in various sizes, allowing the handling of small parts or larger workpieces depending on the machine’s capabilities.
  • Accuracy and Rigidness: Given that VMCs are used for precise machining, the work table is designed for minimal distortion and to offer high rigidity, reducing vibration during cutting operations.
  • Pallet Systems: For increased efficiency, VMC work tables can be paired with pallet changers to automate the loading and unloading of parts, especially in mass production environments.

Factors to Consider for Both VMC & CNC Machine Work Tables:

• Load Capacity: The work table must be able to support the weight of the workpiece and any fixtures used during the machining process.
• Clamping Methods: The table should allow for secure clamping, which can involve T-slot designs, vises, rotary tables, or special fixtures.
• Surface Finish: The work table surface must be smooth and free from defects to ensure precision machining.
• Table Movement: Depending on the machine, the work table might move along different axes (X, Y, and sometimes Z) or remain stationary, while the cutting tool or spindle moves. This is essential for the machining of complex parts.