Fixtures vs Jigs: What Are The Differences

1, Definition and characteristics of fixtures and jigs

A fixture is a mechanical device that secures a workpiece to machining equipment to maintain its precise position. Fixtures are commonly used on various milling, turning, drilling, and threading machines to ensure precision and stability.

A fixture holds a workpiece in place during machining, capturing it through a series of positioning and clamping operations. Unlike fixtures, jigs are specifically designed to process a specific workpiece or product. Jigs are commonly used in automated machining lines and are widely used in industrial production applications such as welding, injection molding, stamping, and die-casting.

2, The difference between fixtures and jigs

Both fixtures and jigs are used to maintain the exact position of the workpiece during machining and improve machining accuracy. However, they also have some essential differences.

  1. Fixtures are mainly used to maintain the accurate position of workpieces on machines such as machining centers, lathes, and stamping machines. Jigs are mainly used in automated production lines to capture and position specific workpieces.
  2. Fixtures are usually generalized mechanical devices that can be used for a variety of workpieces; jigs are specially designed for specific workpieces and are usually not flexible.
  3. Clamps use mechanical and manual clamping methods and can be used for workpieces of various shapes and sizes; jigs use mechanical, pneumatic or hydraulic methods for positioning and clamping and are only suitable for workpieces of specific sizes and shapes.

3, Summary

Both fixtures and jigs are commonly used tools in manufacturing. The key differences between the two lie in their purpose, design, and flexibility. Jigs focus on controlling the position or movement of a specific workpiece and are primarily used in automated production lines to improve efficiency and accuracy. Fixtures, on the other hand, focus on securing the workpiece for processing or inspection.

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