Let's first understand the suction force of a vacuum suction cup. The suction force of a vacuum suction cup is mainly achieved through a vacuum pump or vacuum generator. So, how do we calculate the size of the suction force?
1) When lifting horizontally? Calculate the lifting force based on the vacuum pressure.
F=0.1 × A × P
F: Theoretical lifting force (N) A: Adsorption area of the suction cup (cm2) P: Vacuum pressure (- kPa)
2) When lifting vertically
The adsorption force of vacuum pressure and the friction force between the adsorption surface of the adsorbent and the suction cup are the forces that maintain the object (adsorption force)
F= μ× zero point one × A × P
F: Theoretical lifting force (N) μ： friction coefficient
A: Adsorption area of suction cup (cm ²）  P: Vacuum pressure (- kPa)
The friction force varies greatly depending on the adsorbent, the material of the suction cup, and the roughness of the surface of the adsorbent. It is recommended to conduct experimental testing during actual use.
Static friction f=F force and reaction force
Dynamic friction f= μ  Fn μ The dynamic friction factor is determined by the properties of two objects themselves
Fn positive pressure is the force perpendicular to f
F=friction coefficient X perpendicular to the pressure on the contact surface
Sliding friction formula f=uN
Where N is the pressure, and when on a level ground, N=mg
U is the sliding friction coefficient, which is related to the material.
Suction=S * P/ μ
Among them: S is the suction cup area, in cm ² express
P is the air pressure in kg/cm ² express
μ For safety factor>=2.5
For example, the Italian Votec vacuum suction cup has a vacuum degree of -750mbar, and the diameter of the vacuum suction cup is φ At 80mm, the positive suction force generated by the entire vacuum suction cup is 12.56KG. The calculation condition is:
Vacuum degree is -750mbar, equivalent to 0.75kg/cm ²。
The above is the basic calculation formula, which can calculate a single suction force. If you are a large surface, heavy object, you can choose a suitable arrangement and combination to assemble a suction cup system!
Next, let's talk about how to choose a vacuum suction cup. Vacuum suction cups are currently divided into sponge suction cups, rubber suction cups, etc. If the materials of the adsorbed objects are different, we will also choose different types of vacuum suction cups for you to match! Welcome to consult our engineers online to comprehensively solve your problems!