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DUNKES DN 4

Riveting machine, double riveting unit with rotary indexing table, DUNKES Type DN 4
Rotary table, rotary indexing table with SIEMENS control
Machine No. P 81 - 5458, Year of manufacture 1982 / 2009
Clamping force 40 kN
Rivet shank diameter max. 12 mm
Tool shank diameter 16 mm
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Overhang 190 mm
Rivet head stroke per riveting unit approx. 60 mm
Rivet spindle speed approx. 1400 rpm
Installation height, tool - counter-tool max. 80 mm
Compressed air requirement 6 bar
Motor power per riveting unit 1.1 kW
Mains connection 380 Volt, 50 Hz
- Rotary table, indexing table with servo drive, step size programmable via Siemens PLC control
- Double riveting unit is adjustable within the machine frame in relation to the rotary table
- Table size Ø 295 mm for holding round workpieces
- Pneumatic riveting stroke movement
- Riveting unit adjustment via geared motor with lead screw, positioning via adjustable microswitch
- Modernization of the control system and conversion of the servo drive in the rotary table in 2009
- New electrical control cabinet with Siemens Simatic Panel - Year of manufacture 2009
- Riveting time continuously programmable
- Riveting pressure adjustment continuously adjustable via pressure gauge
- Micrometer stop for limiting the stroke of the counter-rotating riveting units, 0-60 mm
Space requirement 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 on the support disc and fixed with straight rivet pins.
The counter-rotating riveting unit rivets the pin simultaneously from both sides.
The controlled table automatically rotates to the next working position.
Ideal for saw blade manufacturers and repair companies.
Or for the construction of a special machine.

The riveting unit can also be easily removed and used as a conventional riveting machine by creating a suitable counter-tool.

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