What is the difference between transfer press and tandem press lines?

Transfer press uses a single large press with multiple die stations inside, with a transfer mechanism moving parts between stations during each press stroke. Tandem press line uses separate presses arranged in sequence, with automation (robots or transfer bars) moving parts between presses. Transfer presses offer faster cycle times and smaller footprint but limited flexibility. Tandem lines provide flexibility for various part sizes and easier die changes. Transfer presses suit high-volume simple parts; tandem lines handle larger, more complex panels and mixed production. Both require significant capital investment and skilled maintenance.