Rotary Indexers:

• • Rotary indexers are devices that allow the workpiece to be rotated around a specific axis. They typically have a chuck or collet to hold the workpiece securely. Indexers can be programmed to rotate the workpiece at specific angles, allowing machining operations to be performed on multiple sides without the need for manual repositioning.

  • Suitable for cylindrical or prismatic workpieces that require machining on multiple faces.

  • Ideal for high-precision applications.

  • Advantages:

    • Simple to set up and use.

    • Provides precise angular positioning.

    • Suitable for high-volume production of parts with similar features.

  • Limitations:

    • Limited to rotational movement only.

    • May not be suitable for complex geometries requiring tilted angles.

Trunnion Tables:

• • Trunnion tables are mounted on the machine table and can tilt about a rotary axis. This provides flexibility in positioning the workpiece, enabling machining operations on multiple faces with complex geometries.

  • Ideal for parts with features on multiple sides that require machining at various angles.

  • Suitable for complex geometries.

  • Offers flexibility in positioning workpieces.

  • Advantages:

    • Enables multi-axis machining in a single setup.

    • Versatile for a variety of part geometries.

    • Reduces the need for multiple setups.

  • Limitations:

    • May require additional setup time for complex parts.

    • Limited in size for very large workpieces.

• Tombstone Fixtures:

  • Tombstone fixtures are vertical fixtures with multiple sides, each containing clamping surfaces. These fixtures are mounted on the machine table and can hold multiple workpieces simultaneously. The sides of the tombstone can be machined in a single setup.

  • Suitable for high-volume production of small to medium-sized parts with similar geometries.

  • Efficient for parts that can be machined on multiple sides.

  • Advantages:

    • High production throughput.

    • Simultaneous machining on multiple workpieces.

    • Reduces the need for frequent tool changes.

  • Limitations:

    • Limited to parts that fit within the tombstone envelope.

    • Challenging for parts with irregular shapes.

• Pneumatic or Hydraulic Vises with Rotary Axes:

  • Traditional vises are enhanced with rotary axes, allowing the workpiece to be rotated during machining. Pneumatic or hydraulic actuators enable quick and precise adjustments.

  • Suitable for holding small to medium-sized parts where rotational movement is required for machining.

  • Quick and precise adjustments are essential.

  • Advantages:

    • Combines traditional vise clamping with rotary movement.

    • Simplifies setup for parts requiring rotation.

    • Versatile for various part geometries.

  • Limitations:

    • Limited to the size and weight capacity of the vise.

    • May not be suitable for large or heavy workpieces.

• Custom Fixtures:

  • Engineers often design custom fixtures tailored to the specific requirements of a workpiece. These can include a combination of rotary and tilting elements to achieve the desired machining orientation.

  • Custom fixtures are versatile and can be adapted to unique part geometries and production needs.

  • Tailored to specific machining requirements.

  • Requires customization for specialized applications.

  • Advantages:

    • Adaptable to a wide range of part shapes.

    • Offers flexibility in holding and positioning.

    • Can optimize setup for specific machining operations.

  • Limitations:

    • Design and fabrication may be time-consuming.

    • May have a higher initial cost for custom solutions.