Depending on the application, different roller head shapes with fixed or adjustable rollers are used. There are heads with one roller or several rollers. Mostly roller heads with 3 rollers are used. The pressure rollers can be arranged vertically and horizontally, as well as at a certain angle to the vertical axis.
- Sturdy post and beam construction
- Highest load capacity
- Reduced vibrations
- Low bounce
- Quick change of roller head
- Low power requirement
- High roller burnishing performance
- Easy handling
- Stepless height adjustment
- Large clamping surface
- Start of the machine by
- Two-hand operation
- Foot switch
- Various electrical controls available
Area of application:
Roll-forming diameter: ø7 to ø120 mm
Roll-forming materials: steel, stainless steel, aluminium, diecast (Al, Zn or Ms alloys)
Types and sizes of roller burnishing heads and roller burnishing units:
There are 2 standard sizes.
VR2xx with NE2xx (hydraulic feed up to 12 kN max. 80 mm stroke) Roller head with horizontally arranged rollers Application range Ø14-35 mm
VR5xx with NE5xx (hydraulic feed up to 40 kN max. 72 mm stroke) Roller head with vertically arranged rollers Application range Ø30-110 mm
The bushing technique is used to insert plain bearing bushes into joints. The bushing is pressed in and pre-bushed by the device. In order to achieve a high quality and a uniform torque curve of the finished bearings, the bushing is calibrated after the final flanging.
Area of application:
Bush diameter: ø4 to ø30mm with walls from 0.3 to 1.0 mm
Bushing materials: Teflon-coated sheet metal or fabric back bushings with/without flanging, plug-in bushings with/without counter washer
Types and sizes of bushing units:
There are 4 preferred series.
Hydropneumatic feed unit up to 15 kN with 100/12 mm stroke
Hydropneumatic feed unit up to 30 kN at 100/30 mm stroke
Electro-servo feed unit up to 30 kN at max. 300 mm stroke
Electro-servo feed unit up to 60 kN at max. 250 mm stroke
Of course, the Friedrich bushing units can be combined with electronic quality assurance systems. For this purpose, various controls and programmes based on force-displacement measurement and adapted to the special conditions of bookmaking are available.