Cold Drawn Welded (CDW) tubes are produced at state- of- the- art manufacturing plant that has the capabilities to produce high quality tubes at fully Automated Draw Benches at low cost and with short lead & committed span.
These tubes are suitable for variety of applications & are extensively in demand now-a-days in the Automotive & General engineering sector due to :
• High precision dimensional tolerances.
• Higher strength.
• Controlled & uniform mechanical properties.
• Smooth surface finish – 0.2 Ra for cylinder bore quality.
• Uniform sectional thickness.
Manufacturing Process:
• It initiates with Annealing and Surface treatment of ERW tubes.
• Cold swaging/push pointing operations for preparing pointed ends.
• High precision close machined die to control outer diameter.
• Plug placed coaxial with outer die to control inner diameter.
• Annealing, straightening, 100 % Mechanical & Final testing to ensure quality and fitness for required application as per demand.
• Process is repeated if Tube Draw Reduction increases in case of Smaller & Critical outer diameters.