“Established in 1885, DENN (Industrias Puigjaner, S.A.) has over 140 years of expertise in manufacturing metal forming machine tools.”
DENN: Innovation & Experience in Metalforming
- standard to fully custom machines
- modern, fast, safe & flexible
- reliable construction & components
- custom & user-friendly software
- superb surface finishes
- superb repeatability
DENN Flow Forming Machines (Flow Forming Lathes), RL, RLE, LW models
- CNC controlled machines
- user-friendly and feature-rich interactive graphical CAD-CAM programming system
- smart machines with AI (Artificial Intelligence) functions
- 2, 3, 4 and 6 roller flow forming machines available; or other custom roller configurations
- machines prepared for cold and / or flood cooling and / or hot forming applications
- remote site troubleshooting and programming
- Ethernet / USB / Networking connectivity
- preventative maintenance software
- Industry 4.0 – DENNdata
- DENN-Trace software: registers values like motor consumption, tool position, axis force & speed
- Part Thickness Control: advanced sensors (probe and laser) and AI
- automatic loading / unloading systems and robotics options
- devices for faster setups and change-overs
- safety devices for safe handling – protecting the operator and the machine
- plus many other options are available to make these machines ideal for countless applications
What are our RL flow forming machine models?
High-precision CNC cylindrical flow forming for tube production.
The RL is a CNC cylindrical flow forming machine designed for tubes and preforms.
It reduces wall thickness through a stable, repeatable process, delivering controlled deformation and premium surface quality for precision production.
DENN machines can be integrated into automated production lines.
Benefits of the RL models:
- Consistent wall thickness and elongation: 3 or more forming rollers ensure controlled reduction and repeatable part geometry.
- Premium surface finish: Cold flow forming produces smooth internal and external surfaces, reducing secondary operations.
- Two forming strategies: Direct and reverse (indirect) flow forming, selected according to material flow direction and preform geometry.
- Maximum uptime: DENN graphical CAD-CAM + ISO programming enables fast setup and on-the-fly optimization without stopping production.
What are our RLE flow forming and shear forming machine models?
CNC flow forming for simple geometries with precise wall control.
The RLE is a CNC lathe designed for flow forming and shear forming, equipped with two forming rollers.
It is intended for manufacturing tubes, cones, and simple geometries, combining controlled material deformation with stable and repeatable industrial performance.
DENN machines can be integrated into automated production lines.
Benefits of the RLE models:
- Controlled wall thickness and elongation: Two forming rollers positioned at 180° against the mandrel ensure stable material flow.
- Premium surface finish: Cold forming achieves a smooth surface finish, depending on material and process conditions.
- Two forming strategies: Direct and reverse (indirect) flow forming, selected according to material flow direction and preform geometry.
- Repeatable industrial results: Consistent geometry and surface quality across production cycles.
What are our LW flow forming machine models?
High-precision vertical flow forming machines.
The LW is a vertical CNC flow forming lathe designed for cylindrical flow forming.
It manufactures parts from tubes or preforms, combining industrial productivity with graphical programming through DENN CAD-CAM to ensure precision and repeatability.
DENN machines can be integrated into automated production lines.
Benefits of the LW models:
- Cylindrical flow forming process: High-quality surface finish with tight wall thickness control.
- Controlled reduction and elongation: Stable axial material flow for consistent part geometry.
- Optimized multi-machine operation: Simplified management of multiple stations from a safe area.
- Repeatable industrial results: Consistent performance across production cycles.
Featured Videos
DENN Flow Forming Machines
Photo Gallery – DENN FLOW FORMING MachineS
