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Clamping bridges instead of machine table for maximum flexibility

Type of machine: VHC

Large clamping bridge - with 12 zero point clamps
Large clamping bridge - with 12 zero point clamps
Large clamping bridge - with 12 zero point clamps
Large clamping bridge - with 12 zero point clamps
small clamping bridge - with 4 x 5 zero clamps
small clamping bridge - with 4 x 5 zero clamps
small clamping bridge - Clamped by two rotary tables
small clamping bridge - Clamped by two rotary tables: movable on the right, as counterbearing on the left
[Translate to English:] Rundtisch RTA 5 als Gegenlager mit 7 Nullpunktspannern in verstärkter Ausführung
Rotary table RTA 5 as counterbearing with 7 zero clamps in verstärkter Ausführung

Task:

Development of a variable working area that enables the usage of different clamping bridges; ensures very flexible adaptation to machining requirements

Solution:

  • Travelling column machining centre VHC without machine table
  • Instead, two vertical rotary tables to accommodate different clamping bridges
  • While one rotary table is in a fixed position, the second can be moved in the work area. The clamping bridges are centred between the rotary tables via a centring groove and two support bolts per faceplate before they are clamped via the zero-point clamps.

Small clamping bridge:
2000 mm length - equipped with 20 zero-point clamps
controlled via M function, an additional manual control unit on the bridge divides the zero point clamps into four individual, separately selectable areas (one clamping area per side)

Large clamping bridge:
2400 mm length - equipped with 12 zero-point clamps
controlled via M function

Special characteristics:

  • no machine table
  • Two additional pneumatic couplings on the face plate of a rotary table supply the clamping bridges with compressed air. Thanks to an additional connection on the clamping bridges for external air supply, they can also be equipped with clamping devices outside the machine, which reduces the overall set-up times.
 

Working area:

X-traverse range: 2600 mm
Y-traverse range: 1000 mm
Z-traverse range: 1200 mm

Spindle:

Main drive (with 40% DC): 56 kW
Spindle torque (with 40% DC): 540 Nm
Speed range:  7500 rpm

Tool changing:

XTS tool magazine with 144 tool places, SK 50

4. axis:

Swivelling head continuously interpolating, +/- 100°

5. axis:

vertical NC-rotary table RTA 5, movable in X-direction
Ø 800 mm, with 7 zero point clamps pneumatically controlled

Counterbearing:

vertical NC-rotary table RTA 5
Ø 800 mm, with 7 zero point clamps pneumatically controlled

Clamping bridges:

small clamping bridge: 2000 mm length - with 20 zero point clamps
large clamping bridge: 2400 mm length - with 12 zero point clamps