Sheet metal fabrication in Lithuania

Most suppliers sell one link of that chain. A part is cut at one company, bent at a second, welded at a third and coated at a fourth. Every handover adds transport, a new setup, a new datum and a new place for responsibility to disappear. When a welded assembly distorts, nobody can say whether the cut, the fixture or the weld sequence caused it.

Alumnita runs the whole chain in one plant. We cut the blank ourselves, design and build the welding fixtures around the parts we cut, weld them with our own robot and send the finished assembly straight to chemical pre-treatment and the powder coating line. Tolerances, edge condition and fixturing are matched from the first step, and the customer deals with one supplier, one delivery date and one technologist who knows the part.

1. Enquiry and engineering reviewWe check manufacturability before quoting and tell you what would make the part cheaper or more reliable to produce.
2. QuotationPrice, lead time and technical conditions, calculated by operation – not refined later.
3. Nesting and programmingParts are nested for material yield; cutting and bending programs are written and stored for repeat orders.
4. CuttingSheet on the 12 kW fibre laser, tube on the tube laser, in one datum per part.
5. FormingPress brake bending, tube bending, stamping and forming on the presses.
6. JoiningRobotic CMT welding for series, laser welding for visible or thin joints, TIG and MIG/MAG for one-offs; fixtures designed together with the part.
7. Surface treatmentBlasting and degreasing where needed, automatic chemical pre-treatment, electrostatic powder coating and oven curing.
8. Assembly, inspection and packingRiveted and threaded joints, dimensional and visual inspection, labelling and packing ready for shipment.

Sheet metal fabrication covers the manufacture of parts and assemblies from flat sheet and from tube: cutting the blank, forming it, joining the pieces, treating the surface and assembling the finished product. UAB Alumnita performs all of these operations in its own plant at Raudondvario pl. 127 in Kaunas, Lithuania, as part of Tututis Group, a manufacturing group operating since 1999.

Sheet is cut on a 12 kW fibre laser with a 4000 × 2000 mm working area and ±0.02 mm repeat positioning. Tube and profile are cut on a fibre tube laser that produces holes, slots and bevels in one cycle from a single datum, including zero-tail cutting that leaves no remnant. Forming is carried out by press brake bending, CNC tube bending up to Ø40 mm and a press shop of thirteen presses from 6 to 40 tonnes for blanking, piercing and forming in series.

Joining is done by an ABB robot with a Fronius CMT power source for repeating welds in series, by laser welding where the seam is visible or the sheet is thin, and by TIG and MIG/MAG for prototypes and non-standard assemblies. Welding fixtures are designed and built in-house together with the part. Surface treatment includes abrasive blasting, degreasing and automatic chemical pre-treatment, followed by electrostatic powder coating in the full RAL palette with matt, satin, gloss and textured finishes, for parts up to 5500 × 1400 × 2600 mm and 430 kilograms.

Our customers are machinery, equipment, furniture, construction and energy companies in Lithuania, the Baltics, Scandinavia and Germany that need one accountable supplier for a complete metal product rather than a chain of subcontractors. Quantities run from a single prototype to recurring series, and because programs and fixtures are stored, repeat orders start without new setup.