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Bean Force by Cidonio Stampi: mechanical force multiplier up to 10x
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Cidonio innovation · Bean Force

Bean Force: up to 10 times the force, from the bottom upwards

The Bean Force multiplies the force of a gas, mechanical or elastomer spring up to 10 times thanks to a lever principle, and delivers it in the opposite direction to the load: in a vertical press, from the bottom upwards. Originally developed for dies, it can be applied wherever a force needs to be multiplied: high-pressure valves, seismic dampers for racking and steel structures, and much more.

What the Bean Force is

It is a device to be integrated into the die which, thanks to an innovative lever principle, multiplies the effort of an initial force (F1) supplied by a gas spring, a mechanical spring or an elastomer compression spring.

The multiplication factor reaches up to 10×, selected according to the required force and the space available in the die.

The prototype consists of four elements: the initial force support (transverse), the Bean Force support (central), the second support element (upper) and the forming bush support (lower).

CIDONIO'S Bean Force logo

The real innovation

The multiplied force is developed in the opposite direction to the initial load force: in a blanking die mounted on a vertical press it therefore acts from the bottom upwards.

Once forming is complete, the multiplier disengages at zero force and allows the press to continue its stroke: the die can thus work on several Z levels in the same cycle.

Bean Force

Not just dies: wherever a force needs multiplying

The Bean Force principle is not tied to the die: it can be used in any application where a force needs to be multiplied in a small space, starting from a spring or a small actuator.

High-pressure valves

High closing and sealing forces with smaller actuators or springs.

Seismic damper

Seismic protection at the base of racking and steel structures, capable of absorbing large forces.

Clamping and fixtures

Clamping of workpieces and fixtures with multiplied forces and controlled release.

Machines and systems

Wherever an available force needs to be multiplied and reversed in direction.

How it works, step by step

01

Initial force F1

A gas, mechanical or elastomer spring supplies the starting force.

02

Lever multiplication

The lever principle multiplies the force up to 10 times, in the opposite direction to the load.

03

Clamping and forming

When the forming bush meets the punch, the punch is locked and the modular movement clamps and forms the sheet metal.

04

Zero-force release

The module disengages and the press continues its stroke towards the next stage, on another Z level.

Technical specifications

Multiplication factorUp to 10×
Initial force (F1)Gas spring, mechanical spring or elastomer compression spring
Direction of resulting forceOpposite to the initial load: from the bottom upwards in a vertical press
After formingZero-force release, the press continues its stroke (work on several Z levels)
OperationsBlanking, deep drawing, forming and sizing of sheet metal
With cam applicationsLateral or inclined forming with the same force ratio
Application footprint50 × 50, 60 × 60 mm or larger sizes, also with multiple cylinders or lateral springs
PrototypeApprox. 60 × 120 × 40 mm (W × L × T)

Advantages

Bottom-up operations

Bottom-up forming or blanking combined with conventional top-down punching or forming operations.

Compact footprint in the die

High forces in a small space, where much larger gas springs, mechanical springs or elastomers would otherwise be needed.

One die instead of 2-3

Multiple forming operations in the same die and on several Z levels.

Cam-compatible

Lateral or inclined forming with the same force ratio.

Even without gas springs

It works very well with mechanical springs or elastomers, which is useful where gas springs are best avoided for workplace safety reasons.

Blanking, drawing, forming, sizing

A single device for several types of sheet metal operation.

More about the Bean Force

Force multiplier

Industrial applications

Die springs: more force, less space

Alternative to gas springs

Mechanical or pressure multiplier?

Bottom-up blanking and forming

Lateral forming with cams

Multiple forming operations in one die

Bean Force FAQs

What is the Bean Force?

It is a device to be integrated into sheet metal dies which, using a lever principle, multiplies the force of a gas, mechanical or elastomer spring up to 10 times.

In which direction does the multiplied force act?

In the opposite direction to the initial load: in a die mounted on a vertical press it acts from the bottom upwards.

What happens after forming?

The multiplier disengages at zero force and the press continues its stroke, so the die can work on several Z levels.

Which operations does it enable?

Blanking, deep drawing, forming and sizing of sheet metal, including lateral or inclined operations with cam applications.

Is a gas spring required?

No: it also works with mechanical springs or elastomers.

How much space does it take up?

Application sizes start from 50 × 50 or 60 × 60 mm; the prototype measures approximately 60 × 120 × 40 mm.

How can you increase the force of a spring in a die without replacing it?

With a force multiplier such as the Bean Force: the force of the existing spring is multiplied up to 10 times by a lever principle, without increasing the spring’s footprint.

How do you perform blanking or forming from the bottom upwards?

You need a force that acts against the press load. The Bean Force develops the multiplied force in the opposite direction to the load, i.e. from the bottom upwards in a vertical press.

Is there an alternative to hydraulic cylinders or intensifiers in the die?

Yes: the Bean Force is a purely mechanical multiplier, with no power unit, hoses or fluids to maintain.

How can you reduce the number of dies needed for a part?

By working on several Z levels in the same cycle: after forming, the Bean Force disengages at zero force and the press continues its stroke towards the next operation.

Can lateral or inclined forming be performed with more force?

Yes, by combining the Bean Force with cam applications the same force ratio is maintained laterally or at an angle as well.

Can the Bean Force be fitted to existing dies?

We assess each case on the basis of the die and part drawings: it can often be integrated with limited modifications.

Assess the Bean Force for your die

Send us the part drawing: our engineering department will assess whether and how to integrate the Bean Force and reply within 24 working hours.

PDF, STEP, IGES, DXF, DWG, ZIP, JPG or PNG – up to 4 files, 20 MB each. Files are used only to assess your request.

Send us your drawing. Technical reply within 24 hours.

Talk directly to the people who design and build your die: no middlemen, reliable lead times and certified quality since 1969.

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