Pneumax-Technology for vacuum applications

Overall dimensions and technical information are provided solely for informative purposes and may be modified without notice. VI Criteria for selecting a suction cup: Suction cups are gripping elements (or devices) that can handle many different kinds of objects; obviously their shape, weight, material, size and type of movement have a direct effect on the choice of suction cup, both in terms of shape and the material of which it is composed. Generally speaking, suction cups can have two or three types of shapes: flat, profiled and bellows (single or multiple).Flat and profiled suction cups are suitable for gripping andmoving smooth, flat or slightly curved surfaces, especially in a direction perpendicular to the gripping surface, with good shear strength. For deformable, very heavy and/or superficially dirty surfaces, suction cups that have a high grip coefficient are available, obtained by using specially-shaped anchors in the gripping area. The bellows suction cups are suitable for gripping and moving irregular, cylindrical, curved surfaces. The suction cup's capacity to conform to the surface depends on the number of changes the bellows will have tomake. Obviously the shear strength will be considerably less than for smooth suction cups, but the capacity for "articulated" action is highly flexible for angular grips. Theforceofthesuctioncupisproportionaltothedegreeofvacuumgeneratedinsideitandtothesurfacecoveredbythissamesuctioncup. Themain reference data are: Theoretical force (Ft): Ft =surface of the suction cup x percentage of vacuum Effective force (Fe): Fe=Ft – 50% K Factor (Safety coefficient): This factor is used to correctly and safely size the suction cup as a function of the various applications; the K factor will differ depending on the application. K=2 : horizontal linear movement K=4 : vertical linear movement andmovement alongmore than one axis axis K=6 : vertical movement alongmore than one axis (rotation) Level of vacuum to be generated during gripping: In practical applications no surface to be moved using vacuum is actually entirely impermeable.In cases of porous materials and surfaces that are non-regular (wood, cardboard, etc.) and smooth, some of the air will leak out in the direction of the vacuum; in this case, it is necessary to keep the vacuum flow rate high to compensate for the aforementioned leakage and maintain the grip; this is brought about with a low level of vacuum and broader diameters of the suction cups; on the other hand, if the materials are rigid and nonporous (metal, thick plastic, glass, etc.), the flow rate of the vacuum stays weak or non-existant, and so you need to raise the level of vacuumusingmore compact suction cups. In summary: 1) Porousmaterials: degree of vacuumbetween 35 – 60% 2) Nonporousmaterials: degree of vacuumbetween 55 – 80% Determination of the suction cup diameter After having chosen the type of suction cup and thematerial, you can go on to calculate the diameter of that suction cup; to do this, you need to use predefined formulas that take into account the following: D = diameter of the suction cup in mm / K = safety factor / V = degree of vacuum (- Kpa) n = number of suction cups in the application / m = mass to be handled (in Kg) The formula will vary as a function of the type of suction cup (flat - profiled - bellows single or multiple). The formulas are the following: Flat suction cup D=140 * Profiled suction cup D=123 * Bellows suction cup D=152 * (two bellows 223 / three bellows 558) We can subdivide the applications with suction cups into: Horizontal , where the object is lifted andmoved parallel to the plane Vertical , where the object is lifted andmoved perpendicular to the plane Due to a number of factors intrinsic to the handling system, such as friction, gravity and acceleration, the safety factor has to be implemented to prevent the object fromslipping and detachingwhile it is beingmoved. √ m*K V*n √ m*K V*n √ m*K V*n Safety factor table K (Safety factor) Type of handling 2 4 4 6 Horizontal movement Vertical movement Horizontal movement with Robots Vertical movement with Robots Series 1900 Vacuum components Vacuum technology