Hydraulic Retracting
Turn Clamp Cylinder
HDHSZ-A
- For medium and large presses
- 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 initially hidden entirely in the clamp housing and then extended hydraulically until it reaches the end position. On actuation of the valves the tie rod carries out the rotation first and then clamping movement.
In order to secure the clamping force, hydraulic pressure must be main tained (e.g. with pilot-controlled check valves.)
Pressure sensing by the pressure switch on the hydraulic power pack is required. In order to unclamp the tie rod is first lifted from the clamping point. Then the valves are switched over thus causing the tie rod to rotate in
unclamping position and then to retract in its park position inside the.
- 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
- Tie rod can be turned by hand.
- Pilot-controlled check valves
- Flow control valve
- Fittings
- Hydraulic hoses / Hydraulic accesories
- Hydraulic power packs
- Limit switches / cable
Technical data
| Type | HDHSZ-A 100 | HDHSZ-A 200 | HDHSZ -A 400 |
|---|---|---|---|
| Clamping force [kN] / at operating pressure [bar] | 100/215 | 200/238 | 400/232 |
| max. loading force [kN] 1) | 125 | 250 | 500 |
| max. operating pressure[bar] | 250 | 250 | 250 |
| Clamping dimension tolerance [mm] | +/- 2 | +/- 2 | +/- 2 |
| Stroke {mm} | 8 | 8 | 8 |
| Oil volume: Clamp / unclamp [cm3] | 70/112 | 113/152 | 212/319 |
| 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-in type (M8x1), cable length ca. 0,2 m · Tie rod rotated to unclamped position and retracted S1 · Tie rod rotated in clamping position S2 · Tie rod retracted S3 · Tie rod extended S4 |
||
| max. operating temperature[°C] | 70 | ||
| Weight [kg] | 23 | 41 | 93 |
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.