Hydraulic Retracting
Turn Clamp Cylinder
HDHSZ
- For medium and large presse
- For clamping upper and lower dies
- For dies with lock plates, U-recess or T-slot
- Fixed installation on the press slide or press bed
Mode of operation
Two double-acting hydraulic cylinders provide the rotation respectively the extension and clamping movement of the tie rod.
Description
The tie rod is initially hidden entirely in the clamp housing. During extension it is supplied with torque. The rotation of the tie rod head is restricted by a guide plate on the clamp unit and by the die (lock plate). As soon as the tie rod head is no longer guided, it rotates to the clamping position. Then, the clamping cylinder executes the clamping stroke. The sequence of movements is controlled internally. In order to secure the clamping force, hydraulic pressure must be maintained (e.g. with pilot-controlled check valves).
Pressure sensing by the pressure switch on the hydraulic power pack is required.
- Fully automatic operation
- Large clamping dimension tolerance
- Simple monitoring of functions by proximity switch
- Continuous clamping force monitoring by pressure sensing
- Minimal installation investment
- Pratically maintenance free
- High clamping force and small dimensions
- Only two hydraulic connections required
- Tie rod can be turned by hand.
- Pilot-controlled check valves
- Flow control valve
- Fittings
- Hydraulichoses/Hydraulicaccesories
- Hydraulic power packs
- Limit switches / cable
Technical data
| Type | HDHSZ 100 | HDHSZ 200 |
|---|---|---|
| Clamping force [kN] / at operating pressure [bar] |
100 / 400 | 200 / 400 |
| max. loading force [kN] 1 ) | 125 | 250 |
| max. operating pressure [bar] | 400 | |
| Clamping dimension tolerance [mm] | +/- 2 | |
| Stroke {mm} | 6 | |
| Oil volume: Clamp / unclamp [cm3] | 93 / 76 | 181 / 130 |
| Max. oil volume flow [l/min] 2) | 1,2 | |
| Limit switch:Number / type Supply voltage Connection type Designation |
· two inductive proximity switches · 10-30 V DC ·Plug-intype(M8x1),cablelengthapprox.0,2m ·Tie rod unclamped and rotated to unclamped position S1 · Tie rod rotated in clamping position S2 |
|
| max. operating temperature [°C] | 70 | |
| Weight [kg] | 24 | 46 |
1* Mechanical damage may occur at higher loads
2* If a pump with a greater output is used, the oil flow must be reduced by means of flow control valves or one way restrictors.
Fixing is achieved with four screws, DIN EN ISO 4762 , strength class 10.9 (not included).