Manifold plates
32Pages

1. Use and function 2. Advantages 3. Buffer system 4. Operating medium 5. Filling pressure and cyclic load 6. Pressure increase 7. Design 8. Selection of the correct manifold plate 9. Safety regulations 10. Products p. 5.160 – 5.170 11. Reply by fax p. 5.181 12. Project management / project support p. 5.182 13. Contact p. 5.183

Use and function The manifold plate is a complex component with a distinct elastic deformation ability for the generation of blank holder, scraper and ejector forces in the tool • during sheet metal bending, • cutting, • forging • and forming processes. The pressure cylinders consist of the cylinder housing, a piston rod and various sealing and guide units. When the piston rod is pushed in through an external force component, e.g. a press ram, the rod displaces the gas contained in the cylinder housing, which reduces the existing gas volume of the system. The reaction force acting through...

Advantages Manifold plates level out forces that are applied unevenly. In comparison to helical compression springs, manifold plates have greater forces and take up less space. Compared to nitrogen cylinders (up to 60%), manifold plates (max. 20%) have a smaller force increase factor. The smaller pressure increase within the system results in lower operating temperatures: This increases the life time of the system. The forces can be adjusted easily through pressure changes at the control panel. The manifold plate especially stands out because of the small pressure and force increase across...

Operating medium Solely technical nitrogen may be used as operating medium. Nitrogen is a neutral, non-hazardous gas. Filling pressure and cyclic load A manifold plate is a piece of pressure equipment than can be used for cyclic load. That means that manifold plates can be operated under highly uctuating operating pressure. The lling pressure can vary between 40 and 150 bar. A manifold plate is designed to limit the pressure increase to a maximum of 20%. The maximum pressure within a manifold plate is therefore limited to 180 bar and secured via burst protection. The effective application...

Manifold plates ST 8840 Selection of the correct manifold plate Initial questions: 1. How much entire force is needed? 2. How many pressure points should this force act on? 3. Which working stroke is required? 4. What are the maximum dimensions of the manifold plate? 5. Which additional milled cavities, boreholes or breakthroughs have to be integrated into the manifold plate? Design of the manifold plate: The displaced gas volume during one working stroke of the manifold cylinder is calculated by multiplying the piston active surface with the actual stroke and the number of manifold...

Casing height variants ST 8841-1, ST 8841-2, ST 8841-3 Variant 1 is used when the thickness of the backing plate is limited and the assembly height can be compensated. Variant 2 is used when the assembly height is limited but the backing plate can be chosen with an appropriate thickness. Variant 3 is used mainly for small strokes and wherever the smallest assembly heights are required. Note: The case height changes with the stroke. Note: The casing installation depth changes with the stroke. Note: The casing installation depth changes with the stroke. Available from 500 daN: Stroke 12.5 –...

Order example 1: Manifold cylinder variant 3 (500 daN) with a stroke of 25 mm. Order number: ST 8841-3-005 x 025 Further dimensions/details: Housing outer diameter = 42 mm Piston rod outer diameter = 12 mm Screw-in thread = M36 x 2 Minimum bore Ø under M36 x 2 = 33.5 mm d = 6 mm P (Steel) = 10 mm Pmin (Aluminium) = 10 mm min Piston active surface Azyl = 4.90625 cm² Minimum lling pressure = 40 bar Maximum lling pressure = 150 bar Minimum connecting hole diameter Minimum bore Ø Thread length housing Case height Minimum depth of thread cylinder mounting hole Overall height, piston extended...

Filing pressure-depending initial forces The end forces are a maximum of 20% higher, depending on the pressure increase and/or the available volume. Order example 2: Manifold cylinder variant 1 (500 daN) with a stroke of 12.5 mm. Order number: ST 8841-1-005 x 012 a) Required lling pressure The required lling pressure is calculated as follows: Filling pressure = Requested force ÷ Piston active surface e.g. 400 daN ÷ 4.90625 cm² = 81.528662 bar ~ 81,5 bar These examples are based on one cylinder each of the type ST 8841-1-005, ST 8841-2-005 or ST 8841-3-005 b) Calculating initial force: The...

Order example 1: Manifold cylinder variant 3 (1000 daN) with a stroke of 50 mm Order number: ST 8841-3-010 x 050 Further dimensions/details: Housing outer diameter = 54 mm Piston rod outer diameter = 22 mm Screw-in thread = M48 x 2 Minimum bore Ø under M48 x 2 = 45 mm d = 6 mm P (Steel) = 10 mm Pmin (Aluminium) = 10 mm min Piston active surface Azyl = 9.61625 cm² Minimum lling pressure = 40 bar Maximum lling pressure = 150 bar Minimum connecting hole diameter Minimum bore Ø Thread length housing Case height Minimum depth of thread cylinder mounting hole Overall height, piston extended...

Filing pressure-depending initial forces The end forces are a maximum of 20% higher, depending on the pressure increase and/or the available volume. Order example 2: Manifold cylinder variant 1 (1000 daN) with a stroke of 25 mm Order number: ST 8841-1-010 x 025 a) Required lling pressure: The required lling pressure is calculated as follows: Filling pressure = Requested force ÷ Piston active surface e.g. 1250 daN ÷ 9.61625 cm² = 129.9883 bar ~ 130 bar These examples are based on one cylinder each of the type ST 8841-1-010, ST 8841-2-010 or ST 8841-3-010 b) Calculating initial force: The...

Order example 1: Manifold cylinder variant 3 (2500 daN) with a stroke of 25 mm Order number: ST 8841-3-025 x 025 Further dimensions/details: Housing outer diameter = 70 mm Piston rod outer diameter = 28 mm Screw-in thread = M64 x 2 Minimum bore Ø under M64 x 2 = 61 mm d = 6 mm P (Steel) = 10 mm Pmin (Aluminium) = 12 mm min Piston active surface Azyl = 22.8906 cm² Minimum lling pressure = 40 bar Maximum lling pressure = 150 bar Minimum connecting hole diameter Minimum bore Ø Thread length housing Case height Minimum depth of thread cylinder mounting hole Overall height, piston extended...