By applying a shear angle to the punch, tonnage requirements can be reduced by up to 30%. Shear on the punch essentially proportions the force being applied by producing an even shearing action through the stroke of the ram rather than by applying all the force at once.
Feed clearance refers to the distance between the punch and die when the tooling is in the open position. The minimum feed clearance required in the tooling is determined by the work piece – you need enough feed clearance to feed the part between the punch and die. The feed clearance required in turns tells you how much advance stroke is required of the Multicyl. Click here to for a detailed explanation of how to select a Multicyl with the appropriate stroke and tonnage for your application.
*TIP*: If the feed clearance required by the part allows for it, the patented self adjusting stroke of the Multicyl allows you to thread the cylinder down far enough to eliminate the pinch point at the point of operation. This makes your Multicyl system safe for your operators and allows you to meet OSHA safety standards without the need for guards or expensive light curtains.
Unlike traditional die sets, Multicyls do not have gibs and slides, as such we need to take care in our selection of die sets. The reason for this is that unbalanced loads and transverse forces have the potential to be transferred up the ram into the cylinder where the seals and other components can be adversely affected. The Die set should always have a balanced load condition and should always have oversized pins and bushings. Additionally, when permitted by the application, the die set should have 4 pins instead of 2 and should have self contained lifter springs to return the top shoe rather than attaching it to the ram of the Multicyl.
*TIP*: To prolong the life of both your tooling and your Multicyl use the checklist below when your designing your die set. The more features you incorporate into the design the better off you will be.
- A. four guide pins wherever possible*
- B. oversized guide pins and bushings
- C. built in depth stop
- D. self contained tool return springs**
- E. a balanced load and centralized working forces
- F. minimal acceptable stripping spring pressure
* Although a 4 pin dieset is ideal, 2 pin applications can be done successfully. However, with a 2 pin die set the central position is not necessarily on the center line of the punch, but may be found at any point in the triangle formed by the 2 pins and the center line of the punch.
** Single acting Multicyls are not designed to return die sets, and die sets should not be attached to the ram of a single acting Multicyl. It is possible, however, to return die sets with a double acting Multicyl, such as our DX and DL series of cyliners. An EAC-1000 flexible coupler or 6003/6004 die connector set (available from Multicyl) should be used in all applications where die sets are attached directly to a Multicyl. Click here for information on these components.
Download Tooling Connection DXF