Classification of smc cylinders, working principle of smc cylinders, how to distinguish smc cylinders with magnetic rings

SMC cylinder classification


1. SMC cylinders are classified by function
Ultra-small cylinder: SMC CJ2 series cylinder, minimum bore diameter 2.5mm
Needle type cylinder: SMC CJP2 series cylinder, with three bore sizes: 6, 10, and 15mm.
Standard cylinder: SMC CJ2 series cylinder, CM2 series cylinder, CA2 series cylinder, MB1, MB series cylinder, CS2, CS1 series cylinder
European standard cylinders: SMC C55, C85, C96, CP96 series cylinders
Free installation type cylinder: SMC CU, CUJ series cylinders
Thin cylinder: SMC CQ2, CQS series cylinders
Lightweight cylinder: SMC CG1 series cylinder
Elliptical piston cylinder: SMC MU series cylinder
Locking cylinder: SMC CL, CN series cylinders
End lock type cylinder: SMC CB series cylinder
Pneumatic slide cylinder: SMC MX series cylinder
Sliding device type cylinder: SMC CXW series cylinder
Double type cylinder: SMC CXS series cylinder
Mechanical rodless cylinder: SMC MY1, MY3 series cylinders
Magnetic rodless cylinder: SMC CY1, CY3 series cylinders
Thin cylinder with guide rod: SMC MGP, MGQ series cylinders
Cylinder with guide rod: SMC MGG, MGC series cylinders
Stop type cylinder: SMC RS series cylinder
Rotary clamping cylinder: SMC MK series cylinder





2. SMC cylinders are classified according to size
SMC cylinders are classified by bore diameter. Cylinders with a bore diameter of less than 10 mm are usually called micro cylinders, cylinders with a bore diameter of 10 to 25 mm are called small cylinders, cylinders with a bore diameter of 32 to 100 mm are called medium cylinders, and cylinders with a diameter greater than 100 mm are called Large tank.​

3. SMC cylinders are classified according to installation methods
Basic installation type cylinder: Installation using threads or through holes on the cylinder body
Foot type cylinder: Installation is called L-type
Flange type cylinder: installed through flange, rod side flange installation, rod side flange installation
Earring type cylinder: Installed through earrings, the cylinder can swing. It is divided into single earring, double earring and integrated ear.
Trunnion type cylinder: Installed through a trunnion, the cylinder can swing. It is divided into rod-side trunnion, rod-side trunnion and intermediate trunnion.

In addition, SMC cylinders can be divided into non-cushioned, cushion-cushioned, air-buffered and hydraulic buffer (for high-speed) cylinders according to the buffer form;according to the lubrication method, SMC cylinders can be divided into oil-supplied cylinders and non-oil-supplied cylinders;The position detection method is divided into limit switch and cylinder with magnetic switch;according to the driving mode, it is divided into single-acting cylinder and double-acting cylinder.

Working principle of smc cylinder


Due to the different purposes of SMC cylinders, the structures of SMC cylinders are also diverse, but the most commonly used is the SMC single-rod double-acting cylinder. The following takes the SMC single-rod double-acting cylinder as an example to illustrate the basic structure of the cylinder.





The figure shows the structural principle diagram of the SMC CM2 series double-acting cylinder. It consists of the cylinder barrel, end cover, piston, piston rod and seals - these are also the five major parts of the cylinder!


The inner diameter of the cylinder barrel represents the output force of the cylinder. The piston must reciprocate smoothly in the cylinder, and the surface roughness of the inner surface of the cylinder should reach Ra0.8um. For steel tube cylinders, the inner surface should also be plated with hard chromium to reduce frictional resistance and wear and prevent corrosion. In addition to using high-carbon steel pipes, the cylinder barrel material is also made of high-strength aluminum alloy and brass. Some small cylinders use stainless steel tubes. For cylinders with magnetic switches or cylinders used in corrosion-resistant environments, the cylinder barrel should be made of stainless steel, aluminum alloy or brass.

The SMC CM2 cylinder piston uses a combined sealing ring to achieve bidirectional sealing, and the piston and piston rod are connected by riveting without nuts.

The SMC cylinder end cover is equipped with intake and exhaust ports, and the oil cylinder is also equipped with a buffer mechanism in the end cover. The rod side end cover is equipped with a sealing ring and a dust ring to prevent air leakage from the piston rod and external dust from mixing into the cylinder. There is a guide sleeve on the rod side end cover to improve the guiding accuracy of the cylinder, bear a small amount of lateral load on the piston rod, reduce the amount of downward bending of the piston rod when it extends, and extend the service life of the cylinder. Guide sleeves are usually made of sintered oil-containing alloy, forward-inclined copper castings. End caps used to be malleable iron, but now aluminum alloys are often used to reduce weight and prevent rust.