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DUNKES DN 4

Orbital riveting machine, double riveting unit with rotary indexing table DUNKES type DN 4

Rotary table with SIEMENS control
Machine no. P 81 - 5458 Year of manufacture: 1982 / 2009
Redjdzp T Nspfx Agisp

Rivet shaft diameter max. 12 mm
Tool shank diameter 16 mm
Throat depth 190 mm
Rivet head stroke per riveting unit approx. 60 mm
Riveting spindle speed approx. 1400 rpm
Mounting height tool to counter-tool max. 80 mm
Compressed air requirement 6 bar
Motor power per riveting unit 1.1 kW
Power supply 380 Volt, 50 Hz

- Rotary indexing table with servo drive, index step programmable via Siemens PLC control
- Double riveting unit is adjustable within the machine frame in relation to the rotary table
- Table diameter 295 mm, suitable for round workpieces
- Pneumatic riveting stroke movement
- Riveting unit adjustment via geared motor with leadscrew, positioning via adjustable microswitch
- Control system modernized and servo drive retrofitted to the rotary table in 2009
- New electrical control cabinet with Siemens Simatic panel from 2009
- Riveting time continuously programmable
- Riveting pressure infinitely adjustable via pressure gauge
- Micrometer stop for stroke limitation of the opposing riveting units 0–60 mm

Space requirements (L x W x H): 3200 x 1250 x 2400 mm
Weight approx. 2500 kg
Good condition

The machine was used for riveting segment saw blades from Ø 400 to Ø 2000 mm. The segments were manually placed onto the carrier disc and fixed with straight rivet pins. The opposing riveting units rivet the pin simultaneously from both sides. The controlled table automatically rotates to the next working position. Ideal for saw blade manufacturers and repair shops, or for the construction of a special-purpose machine.

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