Shear & Butt Welders

When a coil runs out, the shear and butt welder trims, aligns and joins the old coil tail and the new coil head into continuous strip, reducing the need for re-threading. The downstream mill can continue during the entry interruption when the joining cycle matches the usable accumulator storage. It is a key machine for coil-change efficiency on a continuous line.

We build shear and butt welders in three grades, set by how the strip is welded and how much is automated. The Integrated Shear & Manual Welder has a hydraulic shear, manual alignment (assisted alignment on the gantry version) and manual welding; the hydraulic-shear version uses the customer's own welder, and twin-column and gantry versions are built for wide or thick strip. The Semi-automatic Shear & Welder has a hydraulic shear, manual alignment and a wire-feed welder for electrically controlled welding. The Fully Automatic Shear & Welder shears, aligns and welds automatically, reducing the corresponding manual operations.

Selection depends on strip width, thickness and material, and on the joint quality required: the weld has to survive the forming rollers downstream without cracking. Lines with frequent coil changes or few operators benefit from the semi-automatic or fully automatic grade. The width and thickness range of each grade is in the table below.

Joining time includes more than welding: strip-end positioning, trimming, alignment, clamping, welding and release all contribute to the cycle. Assess accumulator buffering against the actual operating cycle rather than treating one action time as the entire coil-change duration.

Confirm the joint material, dimensions and downstream path together, including passage through the accumulator and forming rollers and any required joint identification or handling. Record the strip, joining method, joint inspection and downstream passage during acceptance; completing one weld does not establish the whole acceptance result.