CylinderType selection
Correctly select the type of cylinder based on job requirements and conditions. It is required that cylinder reaches the end of the stroke without impact and impact noise. A buffer cylinder should be selected;if it is required to be light in weight, a lightweight cylinder should be selected;installation is required If the space is narrow and the stroke is short, a thin cylinder can be selected;if there is a lateral load, a cylinder with a guide rod can be selected;if high braking accuracy is required, a locking cylinder should be selected;the piston rod is not allowed to rotate, a cylinder with a rod non-rotation function can be selected;high temperature A heat-resistant cylinder must be used in the environment;a corrosion-resistant cylinder must be used in a corrosive environment. In harsh environments such as dust, a dust cover needs to be installed at the extended end of the piston rod. When pollution-free is required, no oil supply or oil-free lubrication cylinder should be selected.
Cylinder installation form selection
Determined based on installation location, purpose of use and other factors. In general, fixed cylinders are used. When it is necessary to continuously rotate with the working mechanism (such as lathes, grinders, etc.), a rotary cylinder should be used. When the piston rod is required to move in an arc in addition to linear motion, a pin-type cylinder is selected. When there are special requirements, the corresponding special cylinder should be selected.
Selection of cylinder force
That is, the choice of cylinder diameter. The thrust and pulling force output by the cylinder are determined according to the load force. Generally, the cylinder force required according to the external load theoretical balance condition is selected, and different load rates are selected according to different speeds, so that the cylinder output force has a slight margin. If the cylinder diameter is too small, the output force is insufficient, but if the cylinder diameter is too large, the equipment will be bulky, cost will increase, air consumption will increase, and energy will be wasted. When designing the clamp, the force expansion mechanism should be used as much as possible to reduce the overall size of the cylinder.
Cylinder piston stroke selection
It depends on the occasion of use and the stroke of the mechanism, but generally the full stroke is not selected to prevent the piston and cylinder head from colliding. If it is used in a clamping mechanism, etc., a margin of 10 to 20 mm should be added based on the calculated stroke.
Cylinder piston movement speed selection
It mainly depends on the input compressed air flow rate of the cylinder, the size of the cylinder inlet and exhaust port and the inner diameter of the duct. High-speed movement is required and a large value should be taken. The cylinder movement speed is generally 50~800㎜/s. For high-speed moving cylinders, a large inner diameter air inlet pipe should be selected;for load changes, in order to obtain a slow and steady movement speed, a throttle device or a gas-liquid damping cylinder can be used, which makes it easier to achieve speed control. When selecting a throttle valve to control cylinder speed, please note: when a horizontally installed cylinder pushes a load, it is recommended to use exhaust throttle speed regulation;when a vertically installed cylinder lifts a load, it is recommended to use intake throttle speed regulation;the movement at the end of the stroke is required to be smooth To avoid impact, a cylinder with a buffer device should be used.
Cylinder selection
Procedure 1: Select the cylinder type according to the operation mode:
The cylinder operation modes include double-action, single-action spring press-in and single-action spring press-out.
Procedure 2: Select other parameters:
1. The selected cylinder bore size is determined based on the relevant load, air pressure and direction of action;
2. Select the moving distance of the workpiece in the cylinder stroke;
3. Select cylinder series;
4. Different series of selected cylinder installation types have different installation methods, mainly including basic type, foot type, flange type, U-shaped hook, and shaft lug type;
5. Select the buffer as unbuffered, rubber buffered, air buffered or hydraulic shock absorber;
6. The selected magnetic switch is mainly used for position detection and requires a built-in magnetic ring in the cylinder;
7. Select cylinderAccessories include related connectors.
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