Pneumatic cylinders are used for drive tasks. But drive tasks cannot always be carried out using a standard cylinder. Especially for complex drive tasks with demanding, individual requirements, special pneumatic cylinders are often needed.
With a selection of products from Festo such as tandem cylinders, high-force cylinders or multi-position cylinders, you will always find the right product for every drive task.
A standard pneumatic cylinder consists of many components (e.g. piston, piston rod, cylinder barrel) that are designed and produced right from the start for a wide range of applications and possible uses. Pneumatic cylinders can, for example, be double-acting or single-acting or can also have different types of end-position cushioning.
But why do you need different designs of pneumatic cylinders? Special pneumatic cylinders are used when the requirements for the shape or size of a cylinder for a drive are very special. It is therefore the shape or size of a special cylinder that usually differs from that of a standard cylinder. A few deviations are enough to turn a standard pneumatic cylinder into a special pneumatic cylinder.
Pneumatic multi-position drives are available with two different functional principles. According to the first principle, pneumatic multi-position drives consist of two separate cylinders that are connected using a kit and have piston rods that extend in opposite directions. This means that, depending on the actuation and stroke configuration, this type of cylinder can assume up to four positions. According to the second principle, multi-position cylinders consist of two to five cylinders connected in series with different stroke lengths. With this cylinder type, only one piston rod is visible, which moves to different positions in one direction.
A high-force cylinder is a cylinder design that is characterised by pneumatic compact cylinders connected in series. By connecting a maximum of four pistons in series, the force of the cylinder is increased accordingly. The resulting force is transferred to the external piston rods, where it is ready to be used. The resulting force is applied over the entire stroke, up to a maximum of 5 mm before the end position is reached. The cylinder of the first stage is always used for position sensing, because it performs the visible stroke.
串联气缸由两个相同的 DNC 型材缸筒气缸串联而成，因此两个运动方向的推力均提升了一倍。 由于采用的是 DNC 型气缸，因而装配接口符合 ISO 15552 标准。 这意味着，DSBx 系列与 DNC 系列活塞杆气缸的装配附件及活塞杆附件均可通用。 串联气缸的两个型材气缸均配备磁性活塞，可通过气缸传感器进行检测。 接近开关无需借助任何额外附件，即可便捷、可靠地装配至其中一个传感器插槽中。 能量则可由可调式气动缓冲器完全吸收。 DNCT 系列产品的行程长度可在 500 mm 范围内自由选择，有标准版和耐高温版两种规格，其中耐高温派生型适用最高 120 °C 的环境温度。 如有需要，还可提供其他型号。
倍力气缸和串联气缸的输出力均经过放大，因此需调节运行速度，以保护机械结构以及循环过程的稳定性。 通过阀流量控制，可实现对加速度的平缓调节，并确保在负载条件下推进与返回运动的一致性。 基于速度控制阀的气动配置（通常为气动节流阀或气动节流装置）可作为简单的气缸速度控制器，且无需改动现有的装配接口。
许多串联气缸均采用磁性活塞设计，因此附加位置检测功能是常规配置。 加装气缸传感器作为气动执行器的限位开关：这些气缸终端位置传感器（常用作气缸的限位开关）通常利用气缸用舌簧开关来检测活塞磁铁，从而确认每个行程终点位置。 它们是可靠的气缸行程终端位置传感器，也是广受欢迎的气缸限位开关解决方案。