Beginners are inexperienced, or want to improve the "feel" of the design through preliminary calculation checks.
For example, the output force to be borne by the up and down cylinder is mainly two parts, one is the weight G of the entire moving module, and the other is the shear force F of the cutting terminal. Calculate the two parts to see how much force is required. As for the movement process of the mechanism, there are other resistances to be overcome, such as the terminal insertion process. Since the interference force between the product terminal and the plastic is far smaller than the force of cutting into pieces, we can generally ignore it; for example, it is the same to overcome the frictional resistance of the guide rail. They are relatively small, how small is the small, the ordinary guide rail friction coefficient is several μ, multiplied by the positive pressure (or weight), a rough value can be estimated... Based on such an analysis, a practical requirement can be obtained. The driving force, and then calculate or check the table step by step, that is, the design of "reasonable and well-documented", if you do more, you can "save" these efforts later.
Why is it so important to determine "how much power an institution or process needs"? Because the non-standard working conditions are relatively complex, beginners are often stuck in this step. They don’t know how much power is needed by the current mechanism or process. If this step is not completed, it will be useless.
Pneumatic equipment is different from hydraulic and electric equipment (motor-driven), and it is difficult to quantify in many cases, so there is no need to be too entangled and too dependent on calculation and analysis, such as making a feeding mechanism, moving from point A to point B, the actual mechanism of the mechanism The running speed cannot be calculated by calculation, so what to do when it cannot be quantified but the requirements are harsh, then use other methods (such as electric motors).
The stroke of the cylinder is related to the occasion of use and the stroke of the mechanism. Pay attention to three design points:
●Generally, the full stroke is not selected to prevent the piston and the cylinder head from colliding. If it is used for a clamping mechanism, an allowance of 1-2mm should be added according to the calculated stroke. In other words, the mechanism itself has a limited position function.
The limit should be balanced and stable. The so-called balance means not to let the cylinder "hold" or "hang". The so-called stability means that there must be enough force to block the moving parts that are "menacing", and there is no shaking, shaking or loosening. (For example, the movement direction of the cylinder is perpendicular to the radial direction of the fixing screw, the latter is easy to be loosened slowly by the cyclic load, and should be parallel to the axial direction of the screw)
●The standard itinerary should be selected as far as possible, which can ensure the delivery speed and reduce the cost.