Understand the working principle of vacuum sucker
1. Vacuum sucker
The vacuum chuck is the connecting component between the workpiece and the vacuum system.The characteristics of the selected vacuum sucker have a basic effect on the function of the whole vacuum system.
2.The basic principle of vacuum sucker
How is the work piece adsorbed on the vacuum sucker?
In contrast to the vacuum system, there is a low pressure area (vacuum) between the sucker and the workpiece.
Due to the pressure difference, the workpiece is pushed back on the sucker;
Δ p = (p1, p2,）
Pressure and differential pressure and the effective area is proportional to the relationship, F ~ Δ p and F ~ A A F = Δ x p A.
3.Important features of vacuum sucker
Internal volume: the internal volume of the vacuum sucker is evacuated, which directly affects the pumping time;
Minimum radius of curvature: the minimum radius of the workpiece that can be grabbed by the sucker;
The stroke of sealing lip: refers to the compression distance of suction cup after vacuuming.It directly affects the relative motion of the sealing lip;
Stroke of sucker: Lifting effect when sucker is pumped.
4.Classification of vacuum suckers
Commonly used vacuum suckers include flat suckers, corrugated suckers, elliptical suckers and special suckers.
Flat sucker performance: high positioning accuracy;Small design and small internal volume can minimize the grasping time;Achieve high lateral force;The wide sealing lip has the best sealing characteristics on the flat surface of the workpiece;When grasping the workpiece, it has good stability;The embedded structure of large diameter suckers can realize high suction force (for example, disc suckers);Bottom support;Large and effective sucker diameter;There are many kinds of sucker materials.Typical application areas for inverter suckers: handling flat or slightly rough surfaces of flat or slightly saucer shaped workpieces, such as: metal plates, cardboard boxes, glass plates, plastic parts and wood boards.
Features of corrugated sucker: 1.5, 2.5 and 3.5 fold corrugated;Good adaptability to uneven surface;Lifting effect when grasping the workpiece;Compensation at different heights;Gently grab fragile work pieces;Soft bottom ripple;The hardness of the shank and upper part of the sucker is high.Soft and adaptable tapered lip seals;Bottom support;There are many kinds of sucker materials.Typical applications of corrugated suction cups are: handling disk-shaped and uneven workpieces, such as: automotive metal plates, cartons, plastic parts, aluminum foil/thermoplastic packaged products, electronic parts.
The performance of the elliptical sucker: the best use of the absorbable surface;Suitable for long convex workpieces;Vacuum chuck with enhanced hardness;Small size and large suction;As universal as flat and corrugated suckers;A variety of suction cup materials;The embedded structure has high grasping force (disc-type suction cup).Typical application areas of oval suckers are: handling long and narrow workpiece with a small surface: such as pipe fittings, geometrical workpiece, wooden strip, window frame, carton, tin foil/thermoplastic packaging product.
Special sucker: it is universal like ordinary sucker;The particularity of the material and shape of the sucker makes it suitable for specific application areas/enterprises;Typical applications of special suckers: handling special properties of the workpiece.Such as fragile, porous, easily deformed surface structure.