Hydrostatic guideways

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HYDROSTATIC GUIDE SHOES

Advantages

  • wear-free
    • Unlimited service life
    • Properties of the machine do not change with the service life
  • no friction at standstill – no stick-slip effect
    • Positioning accuracy is not limited by the guide
    • Very small travel steps and very slow movements possible
  • Excellent damping, no vibration
    • improved surface
    • vibration-free running
    • very high load capacity due to large pockets
    • Very high stiffness due to PM controller
    • an oil inflow with constant pressure
    • integrated flow control
    • Attached pressure sensors for monitoring the preload and external loads from CNC
    • low deformations due to screws
    • simple construction of the surrounding parts
    • select the pump pressure 32, 50 or 80 bar according to your max. Loads
    • select oil viscosity VG32, V46 or VG68 according to your max. Speed

Our guide shoes are available in two variants: the symmetrical design is suitable for narrow guides. The asymmetrical design is perfect for wide guides and ultra-precision machines. Of course, special designs are also possible for very special applications. In addition, other cross-sectional profiles and circular-ring segments for rotary tables can also be realized.

A clamping element can be inserted between the guide shoes on both sides. This element has a screwed-on bronze element, which can be applied to the guideway in the middle diaphragm area via an adjustable pressure. The clamping element can be used to add damping or friction in the direction of movement of an adjustable magnitude if this is helpful for machining.

HYDROSTATIC LINEAR GUIDE

Hydrostatic linear guide for smaller slides such as 400 mm with sealing air for sealing:

hydraulic data:

Pump pressure 25 bar
Preference test oil Grinding oil VG10 20-30°C
Preload per pocket 5-10bar = 1000-2000N
Load per bag +/-1500N
Column 12-14µm
Split stiffness per pocket 280 to 700 N/µm
Oil requirement per slide 0.2 – 0.3 l/min
Energy input 9 to 18 Watt

 

pneumatic data:

Air pressure 0,4-0,8 bar
Air requirement approx. 40-80 l/min
strongly dependent on back pressure,
Return and gap
Energy input 100 to 210 watts

DIFFERENT GUIDE PROFILES

Advantages of using PM controllers on guideways

  • Often, a wrap-around can be omitted if the load directions allow it, since with PM controllers the wrap-around is often not necessary only to increase the stiffness
  • For guideways without a handle, the stiffness can additionally be significantly increased by vacuum pockets
  • On guideways with a handle, the stiffness of the guideway can be adjusted largely independently of the load capacity by varying the preload.
  • No wear with increasing service life
  • Damping improved by orders of magnitude, resulting in significantly better workpiece surface and tool life
  • No vibrations and fluctuations in friction as with rolling guides due to recirculating balls
  • No reversal jump of the feed force when reversing the direction of movement
  • Almost frictionless at low speeds
  • no stick-slip effect
  • Travel smaller than 0.1 µm possible
  • Sliding properties of the materials, the carriage and the guideway are insignificant, mineral casting, aluminum or impression compound can also be used

The hydrostatic guidance is adapted to:

  • Weights, machining and acceleration forces
  • Maximum speed and acceleration as well as desired stiffness and optimum damping
Open guide
  • Hydrostatic guidance with highest precision and excellent stiff directional guidance for horizontal applications, provided machining and acceleration forces on the pockets are significantly smaller than the weight forces
  • Preload can be increased by means of weights using vacuum pockets (shown in dark orange) Particularly suitable for cylindrical grinding, surface grinding and workpiece axes of large milling machines

V-face guide
  • No deformation due to screws, thus highest precision
  • Low manufacturing costs, since no surfaces have to be ground to size and no ledges are necessary for horizontal applications, provided machining and acceleration forces on the pockets are significantly smaller than the weight forces
  • Increase of preload and thus stiffness possible by means of vacuum pockets (shown in dark orange)
  • suitable for cylindrical grinding, surface grinding, measuring and ultra-precision machines
  • the stiffness of the directional guide increases with load on the V-track

 

Perimeter guides
  • For guideways with loads in any direction, i.e. also lifting forces
  • easy to manufacture, highly accurate and extremely parallel vertical hydrostatic gaps
  • low manufacturing costs, since no part has to be ground parallel and to size
  • the size of the vertical sum gap is determined by a step grind on one side of the two handle bars
  • for horizontal and vertical slides with large forces, moments and high stiffness

+49 7161 965959-0

info@hyprostatik.de

Hyprostatik Schönfeld GmbH
Felix-Hollenberg-Str. 3
D-73035 Goeppingen

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