Jig
SMT fixture refers to a device used in the mechanical manufacturing process to fix the machining object in the correct position for construction or inspection. In a broad sense, any device used to quickly, conveniently, and safely install workpieces in any process can be referred to as a fixture.
For example, welding fixtures, inspection fixtures, assembly fixtures, machine tool fixtures, etc. Among them, machine tool fixtures are the most common and often referred to as fixtures.