In the face of air pneumatic cylinder component selection, many small white will be based on a lot of previous experience to select. The specific algorithm may involve not much, the following for the primary cylinder selection to do a simple introduction.
The selection process describes as:
selection of action mode, according to the load weight calculated cylinder diameter, according to the actual situation to select the stroke, according to the size of the space selection cylinder series, selection of cylinder installation, selection of cylinder induction switch, selection of other accessories cylinder.
Determine the load size, including the total weight of the workpiece, installation accessories, etc.; Select the pressure of the air source, use the formula F = PS, calculate the area, and further calculate the diameter of the cylinder, at this time to use the principle of selecting large and not small, try to choose a larger cylinder. (Because there is also the effect of load rate in practical applications)
After selecting the cylinder bore and stroke, the installation method should consider and the corresponding installation accessories. If there are precision requirements during operation, it is necessary to consider whether to use cylinders with bearings, with slide rails, etc. And if there requires multiple controls, then need to use multi-position cylinders.
If the site temperature is high, you need to consider using high-temperature type cylinders. The high temperature resistance of the cylinder mainly determines by the seal of the cylinder. The seal of the ordinary cylinder is mainly NBR or TPU. The maximum temperature can only reach 70 degrees Celsius. If this temperature is above, you need to choose the seal of the fluorine rubber material.
There is also a problem that is easily overlooked. It is a slight lateral force. The cylinder cannot have lateral force. If there is some slight lateral force, it can be overcome by using joint bearings, floating joints and other connection accessories.
This article will introduce several points that need to be paid attention to when selecting air pneumatic cylinders:
Classification of air pneumatic cylinders
From the action is divided into single-action cylinder and double-action cylinder. Single-acting cylinders are divided into spring pressure back and pressure out of two. It is generally used in situations where the stroke is short and the output force and movement speed are not high. Double-acting cylinders are more widely used.
From the function, there are many types: such as standard cylinder, composite cylinder, special cylinder, swing cylinder, air claw, etc. Which is more commonly used for free installation cylinder, thin cylinder, pen-shaped cylinder, double-rod cylinder, slide cylinder, rodless cylinder, rotary cylinder, gripper cylinder.
Based on the application of the cylinder in the dynamic characteristics or spatial layout, when we actually choose the cylinder, we first determine a suitable category from three aspects: functional requirements, space requirements, and accuracy requirements.
Selection of air pneumatic cylinder type
According to the work requirements and conditions, the correct choice of cylinder type. Require the cylinder to reach the stroke terminal without impact phenomenon and impact noise should be selected buffer cylinder. Require light weight, should choose light cylinder. The installation space is narrow and the stroke is short, and the thin cylinder can be selected. With transverse load, the cylinder with guide rod can be selected.
High braking accuracy is required, and locking cylinders should be selected. The piston rod is not allowed to rotate, and the cylinder with non-rotating rod function can be selected. High temperature environment need to choose heat-resistant cylinder. In a corrosive environment, corrosion resistant cylinders must be selected. In the harsh environment such as dust, it is necessary to install a dust cover at the extended end of the piston rod. When no pollution is required, no oil or no oil lubrication cylinder is required.
Installation form
According to the installation location, the purpose of use and other factors. In general, fixed cylinders are used.
When it is necessary to rotate continuously with the working mechanism, the rotary cylinder should be selected.
When the piston rod is required to move in a straight line and to swing in a circular arc, the shaft pin type cylinder is used.
When there are special requirements, the corresponding special cylinder should be selected.
The magnitude of the force
That is, the choice of cylinder bore. According to the size of the load force to determine the output of the cylinder thrust and tension. Generally according to the external load theory balance conditions required by the cylinder force, according to different speeds to choose different load rate, so that the cylinder output force to leave a margin. If the cylinder diameter is too small, the output force is not enough, but the cylinder diameter is too large, the equipment is cumbersome, the cost is increased, and the air consumption is increased. In the fixture design, the expansion mechanism should be used as far as possible to reduce the size of the cylinder.
Cylinder stroke
It is related to the stroke of the use occasion and the mechanism, but generally do not choose a full stroke to prevent the piston and the cylinder head from colliding. If used for clamping mechanisms, etc., a margin of 10-20mm should be increased according to the required stroke.
Pneumatic fitting joint also names the quick connector, quick plug connector. Although the name is different, but as long as the basic three points, you can judge the connector and selection.
Structural form
The so-called structural form is the appearance form of the joint formed in consideration of the direction of the pipe. And the flow distribution, and the connection. For example, T-EPE, Y-EPY, and straight-through EPC are from the appearance of the structure.
Confirm the outer diameter or inner diameter of the trachea
On the basis of confirming the structure form, we need to confirm the external or internal diameter of the cannula. General quick couplings are for rapid tube insertion, so it is necessary to confirm the outer diameter or inner diameter of the tube. For example, the through connector EPU8, both ends are intubated. Confirm the external diameter of the cannula. General trachea metric tube, such as 4 MM 6MM 8MM10MM 12MM 14MM 16MM, There are also some other unusual inch external diameter tracheas.
Confirm thread
For the joints with threads, it is necessary to confirm the thread specifications. And there are many thread specifications. The common ones are R thread (also called PT thread) and G thread, and the most common is R screw thread. Generally 1 / 8 is commonly known as 1, 1 / 4 is commonly referred to as 2, 3 / 4, and 1 / 2 is generally known as 4.
While you might be unaware of it, you capitalize on Pneumatic Pressure Switch every day. This button is a type of button that makes electric contact when a particular stress has actually been reached. This is enables fast, easy, and efficient control over a pneumatic or hydraulic source. For the objectives of this short article, we will mainly concentrate on the pneumatic side of the concern.
These Pneumatic Pressure Switch are useful in an exceptionally varied variety of settings varying from industrial as well as production applications to use in the automobile as well as marine industries. Oftentimes, they are developed and engineered to carry out undisturbed by also one of the most extreme shock and vibration.
The many ranges of these switches include differential, solitary, as well as doublePneumatic Pressure Switch as well as customized Pneumatic Pressure Switch over for details operating qualities in specifically demanding applications. These personalized switches over can be crafted for a large variety of applications.
How Pneumatic Pressure Switches Work
Because pneumatically-driven systems function according to the pressed gas going through or kept back by the various parts of the system, these switches are crucial when it pertains to turning off or on an electrically driven compressor when a particular pressure is acquired in the pneumatically-driven system’s reservoir. In other cases, such as with pneumatically-driven suction or gripping devices, the pneumatic pressure switch turns off when there is no suction occurring.
Without these switches, most of the important things we use each day and most of the machines we depend on would be very various. For instance, the marine ships that maintain us secure overseas and the freight ships that aid provide most of the imported products we utilize each day all rely heavily on precision elements like these. In marine applications crucial areas like the engine as well as boiler rooms must be kept an eye on and regulated with a high degree of precision, and stress buttons are often utilized to accomplish the task. This is simply one example demonstrating exactly how a tiny element like a stress button can affect an entire sector and also could establish its success or failure.
Or take into consideration a production atmosphere. Lots of production or setting up systems make use of pneumatic components to grab or relocate tiny delicate parts like motherboard. Without these, the force as well as toughness made use of to take care of these vulnerable and also valuable parts that make up the many tools, playthings, as well as gadgets we frequently rely upon in today’s globe would not be possible.
While you may be unaware of it, you take benefit of pressure switches over every day. This switch is a kind of switch that makes electric contact when a details stress has been gotten to. In aquatic applications critical locations like the engine as well as central heating boiler spaces must be monitored and also controlled with a high level of accuracy, and also Pneumatic Pressure Switch are often used to accomplish the task.
Lots of industrial equipments utilizing compressed air as a power resource, usage air cylinder pneumatic or other pneumatic actuators to do the actual work.
Compressed air is ‘explosive’ as it moves from high pressure to reduced stress on it’s back to ambience. That implies when the air shutoff changes and also air flows to the air cylinder pneumatic tube, the air cylinder pneumatic piston and pole moves extremely swiftly. A broadband air cylinder pneumatic tube pole might not be best for your application, and also you will certainly want to lower the speed and also the effect.
One very easy technique of controlling the rate of an air cylinder pneumatic tube is installing circulation controls airborne lines between the valve to the air air cylinder pneumatic pneumatic, in theair cylinder pneumatic ports themselves, or perhaps in the exhaust ports of the air valve, though the latter is the very least preferable.
In the ‘shutoff exhaust’ kind circulation regulate the controls themselves may be far enough far from the cyndrical tube that the piston and also rod may have taken a trip the full stroke before the exhaust circulation control can start back-pressuring the line to slow down the cyndrical tube. Cyndrical tube control reaction time is always adversely influenced relying on the range from the air cylinder pneumatic to the flow control.
Some individuals go with needle valves to throttle the circulation of air into as well as out of the air air cylinder pneumatic pneumatic, thereby minimizing it’s rate. The trouble with making use of a needle valve to regulate the rate of an air air cylinder pneumatic pneumatic is that it strangles the pressed air flow equally in both directions.
If you are utilizing a bigger air cylinder pneumatic, by throttling the air into the air cylinder pneumatic, you are really avoiding the smooth cyndrical tube stroke preferred. As air pressure builds in the air cylinder pneumatic it will reach the factor where it gets over the friction of the piston as well as pole seals and also the piston will certainly begin to relocate. As it relocates, it raises the volume of the air room inside the air cylinder pneumatic behind itself.
The rule of thumb for utilizing a circulation control to minimize as well as smooth air cyndrical tube piston traveling is to only strangle the exhaust air from the air cylinder pneumatic. The air streaming right into the cyndrical tube port must never ever be reduced.
How is this achieved?
Utilize a “air cylinder pneumatic flow control”. This is a tool that may not look any various from the needle valve. Inside, nevertheless, there is a “needle bypass” which permits the air to bypass the needle which is throttling the air achieving complete circulation of air unidirectionally.
The “totally free flow” of pressed air with the cyndrical tube flow control permits the system, when it’s mounted in the correct positioning, to offer un-throttled and also full inrush of air to the cyndrical tube, yet, when the shutoff has actually shifted as well as the double-acting air air cylinder pneumatic pneumatic has reversed, the air that is currently spurting of the air cylinder pneumatic is throttled to the degree needed to achieve the air cylinder pneumatic rate desired.
There will be a second air cylinder pneumatic circulation control on the various other line as well, as well as this functions precisely the same way.
Consequently, air flow into the air cylinder pneumatic ports at either end of the cyndrical tube is absolutely unencumbered giving high-force piston motion. The piston is attempting to go fast as well as at full power, yet since the exhaust flow of air is restrained by the cyndrical tube flow control, the piston relocates with full power, however at a controlled as well as desired rate.
Many air cylinder pneumatic circulation controls will certainly have a schematic on the side showing the flow paths to guarantee that they are installed appropriately.
Some air cylinder pneumatic flow controls are equipped with sealer layered male threads for screwing right into the air cylinder pneumatic port, as well as with an “immediate” kind fitting into which the cyndrical tube air line can be promptly fitted, attributes that conserve money and time.
That means when the air valve shifts and also air streams to the air cylinder pneumatic, the air cylinder pneumatic piston as well as rod moves exceptionally promptly. If you are utilizing a larger air cylinder pneumatic, by throttling the air into the air cylinder pneumatic tube, you are in fact stopping the smooth air cylinder pneumatic tube stroke preferred. As air stress builds in the air cylinder pneumatic it will certainly reach the point where it overcomes the rubbing of the piston as well as pole seals and the piston will certainly start to move. As it moves, it raises the volume of the air room inside the air cylinder pneumatic behind itself. Utilize a ” air cylinder pneumatic tube flow control”.
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