Recently we have met some problem about the cylinder , and here we put on a post about the Cylinder’s choose, its type ,installation ,force and piston stroke. If you have any interest at this zone ,welcome read below .Wish can bring you some help .

1. The selection of CYLINDER

1), The selection of type

The type of cylinder is correctly selected according to the job requirements and conditions. It is required that the cylinder reaches the stroke end without impact phenomenon and impact noise should choose buffer cylinder; light weight is required, light cylinder should be selected; required installation space is narrow and stroke is short, can choose thin cylinder; lateral load, optional with guide rod cylinder; High braking accuracy, should choose the locked the cylinder; do not allow the piston rod to rotate, optional cylinder with non-rotating function; heat-resistant cylinder should be used in high temperature environment; corrosion-resistant cylinder should be used in corrosive environment. In the harsh environment such as dust, it is necessary to install a dust cover on the protruding end of the piston rod. When no pollution is required, it is necessary to select a cylinder that has no oil supply or no oil lubrication.

2), The installation form

It is determined by factors such as installation location and purpose of use. In general, fixed cylinders are used. Rotary cylinders should be used when continuous rotation with the working mechanism (such as lathes, grinding machines, etc.) . In addition to the linear movement of the piston rod, if the arc swing is required, the shaft pin type cylinder is selected. When there are special requirements, the corresponding special cylinder should be selected.

3), The magnitude of applied force

That is, the choice of cylinder’s bore diameter. The thrust and tension of the cylinder output are determined according to the magnitude of the load force. Generally, according to the external load theory, the required cylinder force is balanced, and different load rates are selected according to different speeds, so that the cylinder output force has a slight margin. The cylinder diameter is too small, the output force is not enough, but the cylinder diameter is too large, making the equipment bulky, the cost is increased, the gas consumption is increased, and the energy is wasted. When designing the fixture, the expansion mechanism should be used as much as possible to reduce the size of the cylinder.

4), Piston stroke

It is related to the occasion of use and the stroke of the mechanism, but generally does not select the full stroke to prevent the piston and the cylinder head from colliding. If used for clamping mechanisms, etc., the amount of 10 to 20 mm should be increased by the required stroke.

5), The speed of the pistonIt mainly depends on the cylinder input compressed air flow, cylinder inlet and outlet size and the inner diameter of the pipe. High speed motion is required to take large values. The cylinder movement speed is generally 50 to 800 mm/s. For high-speed moving cylinders, a large inner diameter intake pipe should be selected; for a change in load, in order to obtain a slow and smooth moving speed, a throttle device or a gas-liquid damping cylinder can be selected, and speed control is easier.Attention should be paid to choosing throttle valve to control cylinder speed: When the horizontally mounted cylinder pushes the load, it is recommended to use the exhaust throttle to adjust the speed. When the vertically installed cylinder lifts the load, recommended air intake throttle speed regulation; When avoiding impact, use a cylinder with a buffer.

2. Cylinder selection

Procedure 1: Select the cylinder type according to the operating form:The cylinder operation mode has three modes: Double acting, single action spring press in and single action spring press out.

 Procedure 2: Select other parameters:

1). The cylinder size of the selected cylinder is determined according to the relevant load, air pressure and direction of action.

2), selected cylinder stroke workpiece moving distance

3), selected cylinder series

4), the selected cylinder installation type different series have different installation methods, mainly basic type, foot type, flange type, U type hook, shaft type

5), selected buffer unbuffered, rubber buffer, air buffer, hydraulic shock absorber

6), the selected magnetic sensor is mainly used for position detection, requires the cylinder built-in magnetic ring

7), selected cylinder accessories including related joints