What is a blade cylinder? Understand the structure and principle of a thin cylinder in one article

1. Blade Cylinder Overview

Blade Cylinder, also knownThin cylinder, flat cylinderIt is a kind of special pneumatic actuator whose axial thickness is much smaller than that of ordinary standard cylinder. Its structure is specially optimized to significantly reduce the installation space requirement while maintaining a certain output force, and is very suitable for installation in automation equipment with limited space and compact structure.

Compared with the traditional standard cylinder, the biggest feature of the blade cylinder is:

• The axial size is extremely small, the shape is flat, similar to the blade;

• More square or rectangular cylinder body, easy to compact arrangement;

• Often built-in magnetic ring, can be directly used with magnetic switch;

• Taking into account the thrust output and space utilization, it is a common component of modern precision equipment.

Blade cylinder in kind

Blade cylinder in kind

2. working principle

The basic working principle of the blade cylinder is the same as that of the ordinary double-acting or single-acting cylinder. It relies on compressed air to push the piston to produce linear reciprocating motion, but the structural design is flattened:

1. Compressed air enters the cylinder without rod cavity, pushing the piston and the piston rod to extend outward;

2. After exhaust, the piston is returned by reverse intake or return spring;

3. During the movement of the piston, the stability is ensured by the seal and the guide structure;

4. The magnetic piston triggers an external magnetic switch for position detection and automatic control.

Single-acting and double-acting forms

• single acting blade cylinder:One side air intake, spring return, simple structure, suitable for short stroke and one-way action;

• double acting blade cylinder:Alternate air intake on both sides, advance and retreat can be controlled, more widely used.

3. structural characteristics and technical advantages

1. Structural characteristics

• Cylinder section is mostly square or rectangular, which is conducive to closely arranged installation;

• Integrated design of piston and piston rod to reduce radial size;

• The cylinder head and the cylinder body are connected by bolts or snap-on type, which is convenient for maintenance;

• Most products built-in magnetic ring, support magnetic switch installation.

2. Main advantages

• Space Saving:The thickness is only 1/2~1/3 of the standard cylinder;

• Flexible installation:Support through-hole installation, side mounting, stacking and other ways;

• Fast response:The gas volume is small, the action frequency is high;

• Light weight:Suitable for robot arms, mobile modules and other weight-sensitive occasions.

3. Limitations and Precautions

• The stroke is relatively short, generally not more than 100mm (except for special models);

• The output force is limited and is not suitable for heavy loads or large inertial loads;

• The lateral load should be strictly controlled, otherwise it is easy to accelerate the wear.

4. typical application areas

Blade cylinders are widely used in various types of precision automation equipment due to their compact structure and rapid response:

Blade cylinder for PCB positioning

Multiple sets of blade cylinders installed in parallel

5. Selection Guide

1. Basic parameter selection

• Bore:Determine the theoretical output force, commonly used specifications 6mm, 10mm, 16mm, 20mm, 25mm;

• Itinerary:According to the actual movement distance selection, it is recommended to reserve 10% margin;

• Mode of action:Single-acting or double-acting, depending on control requirements.

2. Environment and working conditions

• Whether there are dust-proof, oil-proof and corrosion-resistant requirements;

• Operating temperature range;

• Action frequency (times/minute).

3. Accessories and supporting

• Type and quantity of magnetic switch;

• Air pipe interface size (usually M5 or Φ4 quick insertion);

• Install brackets, floating joints, etc.

Key points of 6. installation and maintenance

Installation recommendations

• Ensure that the installation surface is flat to prevent deformation of the cylinder body;

• Avoid bearing large lateral force or torsional moment;

• Pay attention to spacing and synchronization when installing multiple cylinders in parallel.

Daily Maintenance

• Use clean and dry compressed air;

• Regularly check the air pipe and joint for air leakage;

• Observe whether the piston moves smoothly and whether there is any abnormal sound or jam;

• If necessary, replace the seal or replace the cylinder as a whole.

7. Summary

Blade cylinder, as an important actuator in space-constrained automation equipment, has been widely used in electronics, semiconductor, packaging, medical and other industries due to its ultra-thin structure, flexible installation and high-frequency response. In actual projects, reasonable selection, standardized installation and scientific maintenance are the keys to ensure the long-term stable operation of the blade cylinder.

8. industry application cases

In the semiconductor packaging production line, the traditional standard cylinder is too large to cause the equipment to be bloated. A well-known chip testing equipment manufacturer successfully reduced the thickness of the module to 1/3 of the original design after replacing it with XD series blade cylinders, which not only realized the close parallel installation of multiple groups of cylinders, but also greatly improved the response frequency of the equipment and met the micron positioning requirements.