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Disc spring from ERW Engineering

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ERW Engineering ’s disc spring find application in diverse areas. Some of them are the following
Tool clamping components
The tool is released by a hydraulically operated piston, which slides forward over a bolt and clamping tube. As the spring stack is compressed, the collet opens simultaneously. The clamping of the tool is activated by the spring stack. Reduction of hydraulic pressure causes stack unloading and the tool moves into the spindle. The stack of disc springs locks the tool in a clamped position.

Punching dies
The springs are installed as stacks under ejection plates in die-cutting and fine cutting tools. When the upper and lower tolls come together (during cutting) the ejection plate is pressed down, compressing the spring stacks. After completion of the cutting process, the die plate is brought back to starting position by the spring stacks.

Ball casters
The ball casters are used in rolling belts in order to transport tanks. The disc springs allow the ball to avoid taking on an overweight or unequally distributed load.

Roller spring suspension
The rollers are held at a specific force by a stack of disc springs. Upon an extreme change in raw material thickness or foreign material passing through the rollers, the disc springs allow the rollers to flex. This avoids damage to the rollers and bearings.

Gears for adjustable electrical sunroofs
A disc spring is used in the gear of the sun roof. It ensures that the axial pressure on the safety clutch friction pads is equal.

Drill heads
The disc springs absorb the axial impact of the drill heads and drill bit in order to avoid damage to the gear.

Spring support of bridges
All long spanning construction elements, such as bridges are prone to natural oscillation. Through the use of disc springs these oscillations can be reduced.

Spring suspension of diesel motor foundations
Disc springs are used as motor mounts for large diesel engines, such as trains.

Support for ship decks
The disc springs offset deflection and warping of ship decks. This is needed to equally distribute forces on the slide bearing.

Vehicular springs in axle bearings
Spring suspension of railway cars and their cargo, such as tanks for transporting hot metal.

Spring loaded print rollers
Disc springs are recommended for the suspension of the print rollers. This is needed to achieve even print pressure when paper of various thickness is used.

Gas pressure actuated shock absorber
The disc spring serves as a spring cushion and positive stop for the working cylinder.

Door hinges for car doors
A preloaded stack of disc springs forces a steel ball into a spherical indention, locking the car door in position. Various types of spherical indentations are required on different types of door hinges.

Sprinkler heads
The disc spring is bonded with a Teflon film and functions both as a water seal and a load input. The spring applies constant pressure on the glass module until the module is broken. Once broken, water flows open.

Suspended foundations
Disc springs are used to cushion the foundations of lattice masts, houses, etc. This application is especially applied in earthquake prone regions.

Electric smelting furnaces
The electrode is held by the disc spring stack. During the activation of the electrode, the spring stack is hydraulically loaded and electrodes are displaced. To shut off, the hydraulic pressure is reduced and the spring stack unloads, causing the electrode to close.

Pipeline Thermal Compensation
In pipelines, thermal expansion in a vertical and horizontal direction frequently occurs. Through the use of the disc springs, the expansion is compensated for, and the stress in the pipeline is reduced.

Safety brakes
Disc springs are installed in safety brakes in the case of technical malfunction (I.e, loss of power). Braking power will then be generated through the disc springs. In addition, the disc springs will be deployed as shock absorbers in elevator cabins.

Cable clamp stations
The disc springs preload the conveyer belt or cable in order to maintain even cable tension.

The spring stack acts as a shock absorber when the plough passes over stationary objects in the road. This is done through a spring loaded sliding lower plate.

Automatic transmissions
The disc springs serve to hold back and return the clutch pistons. They can also be used as a cushion spring for damping the clutch piston while closing the clutch. Slotted disc springs are predominantly used for automatic transmissions.

Transforms with insulators
The disc springs dampen vibrations between the transformer and insulator (which originate from the transmission line).

Overload clutch/sliding clutch
The disc springs are pre-loaded to achieve certain torque through the clutch. Once the torque limitation is overcome, the ball bearings will slide out of position, causing the disc springs to be loaded further. This will discontinue the transmission of torque.

Drum brakes
The spring stack is compressed for shock absorption resulting from changes of load. An Example of this is sudden jerking of a trailer during pulling. This jerking can be caused by changes in the angle of the road.

Impact damping
The disc springs provide shock absorption for the clamping components of the tool. Without the disc springs, these clamping bolts would quickly fatigue.

Flange springs
Disc springs are used for bolt loading. When compressed to flat, the spring exerts a constant force on the bolt head, preventing the bolt from loosening.

Seat adjustment
Disc springs are used to compensate for production tolerances of fittings, ensuring proper backrest adjustments.

Continuous flow boiler
Spring stacks are used for boiler suspension systems. The spring assemblies compensate for deflections of the bearing surfaces. This guarantees even movement of the boiler resulting from thermal expansion.

Cableway grip
In cableways the disc spring stack generates clamping force between the cable grip and the wire cable. There are two possibilities of clamping:

  • A fixed connection: The disc spring stack is assembled with a fixed length or a constant load. The stack compensates for deformations of the cable wire. The load is static.
  • A coupling connection: The disc spring stack can be opened or closed in a railway station. The load is dynamic.

Piston return springs
The disc spring stack is compressed over a piston by hydraulic pressure. The spring stack forces the piston back to its original position after the hydraulic pressure is released.

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