Equipment

Specifications:

The punch press is characterized by the following parameters:

• Frame type
• Mechanism of delivering power to the ram (mechanical, electro-mechanical or hydraulic)
• Size of working area (e.g., 2500 x 1250 mm)
• Single or multiple station
• Force rating (for example, 20 tons)
• The type of tool shop and its capacity (e.g., store revolving type, capacity 34 tool)
• Speed or productivity (typically characterized by the speed of strokes with a step movement of 25 and 1 mm)
• Speed of movement without shock (speed-load displacement)
• Maximum weight of workpiece
• Safety features
• Power consumption
• The type of software

Instructions:

Mechanical punch presses fall into two distinct types, depending on the type of clutch or braking system with which they are equipped. Generally, older presses are "full revolution" presses that require a full revolution of the crankshaft for them to come to a stop. Full revolution clutch presses are known to be dangerous and outlawed in many countries unless the pinch point is fully guarded. This is because the braking mechanism depends on a set of raised keys or "dogs" to fall into matching slots to stop the ram. A full revolution clutch can only bring the ram to a stop at the same location - top dead center. Newer presses are often "part revolution" presses equipped with braking systems identical to the brakes on commercial trucks. When air is applied, a band-type brake expands and allows the crankshaft to revolve. When the stopping mechanism is applied the air is bled, causing the clutch to open and the braking system to close, stopping the ram in any part of its rotation. Modern part revolution clutch and brake units are normally combined units that operate in a fail safe mode, a dual air safety valve engages clutch and starts slide motion and brake is applied by springs.