B1.738

Block Cylinder with Guided Housing

max. operating pressure 500 bar

Features

  • extending 500 bar steel block cylinder
  • 350 bar aluminum block cylinder
  • retracting 350 bar all versions
  • 4 sizes with different strokes
  • 3 block cylinder variations with and without position monitoring
  • standard FKM seals
  • max. environmental temperature up to 150°C
  • position monitoring version up to 120°C environmental temperature
  • separation of the function “force generation” and “guiding”
  • clamping bolt compensates high transverse forces
  • clamping bolts can be greased
  • cylinder piston protected by guide housing
  • guide housing protected by a sturdy wiper
  • the distance of the block cylinder to the effective point allows application in more hard applications, e.g. welding fixtures
  • hydraulic ports and position monitoring can be mounted at the right-hand side or at the left-hand side

The hardened clamping bolt is located in a guide housing and is connected to the flange-mounted block cylinder by means of a coupling.

The following variations are available
1. Block cylinder as per data sheet B1.5094 without position monitoring
2. Block cylinder as per data sheet B 1.552 with extended piston rod for position monitoring with inductive proximity switches.
3. Block cylinder as per data sheet B 1.554 with magnetic piston and aluminum housing for position monitoring with magnetic sensors.

 

Position Monitoring 

The position monitoring will be screwed on the cylinder bottom and can also be mounted in a position rotated by 180°. Different versions are available according to the application conditions. A control cam is provided at the extended piston rod causing the activation of the proximity switches. The adjustment of the switching position is affected by a displacement of
the proximity switches in the lateral groove. The proximity switches are switched on in a stroke range of approx. 6 mm by means of the control cam. The minimum distance to the positions to be monitored depends on the switch type and is indicated in the table.

Extended Piston Rod

Inductive position monitoring systems, which can be delivered as accessories, are not suitable for applications where coolants are used. Additional covers also have to be provided against swarf.

Aluminum Housing 

Block cylinders with aluminum housing are not suitable for the operation of blanking and punching dies. Uncontrollable spikes and vibrations can appear which especially in the case of aluminum could cause a decrease in tool life. Steel can influence the magnetic field of the magnetic piston and thereby the position of the switching points. If there is the same influence for each stroke (e.g. because of adjoining steel components) it can be compensated by displacing the magnetic sensors. But if the influence differs from stroke to stroke, as e.g. in the case of swarf, a cover has to be provided 30 mm over the magnetic sensors. Covers have to be provided to protect the cylinders against the ferritic swarf.

 

Accessory Magnetic Sensors 

Compared with traditional reed switches the electronic magnetic sensors offer the following advantages:
● Indifference to shock and vibration
● Bounce-free output signal
● Only one switching point
● Wear-resistant
● Protection against reverse battery
● Protected against short circuits
Electric connection is made as per traditional inductive proximity switches; up to four magnetic sensors can be connected in series. A minimum distance of the switching points: 6 mm.

Document Title Language File Type

Coupling Fixture 

Position monitoring with inductive proximity switches

Position monitoring with magnetic sensors