Parameter Influence in CO2-laser/MIG Hybrid Welding
Hybrid welding, as the combination of laser beam and arc welding, is an innovative joining technology that has many advantages compared to the single processes. With the hybrid process joint gap ca ...
Laser hybrid welding of high strength steels
This paper presents results from an ongoing investigation into laser-arc-hybrid welding of thick, high strength steels used in the heavy mechanical and heavy automotive industries. The results include welding parameters for a 6 and 12 kW laser combined with conventional MIG/MAG equipment.In this work, the laser-arc-hybrid welding technique has been further developed and applied to thick steel plate welding, giving high quality welds at high speeds. Successful welds were obtained on 6-12 mm plate thickness with laser, plasma or sheared edges as received from the blanking process. Thereby any costly, additional joint preparation is avoided, giving the hybrid welding technique an enhanced potential for use in the heavy automotive and mechanical industries.This paper presents results from an ongoing investigation into laser-arc-hybrid welding of thick, high strength steels used in the heavy mechanical and heavy automotive industries. The results include welding parameters for a 6 and 12 kW laser combined with conventional MIG/MAG equipment.In this work, the laser-arc-hybrid welding technique has been further developed and applied to thick steel plate welding, giving high quality welds at high speeds. Successful welds were obtained on 6-12 mm plate thickness with laser, plasma or sheared edges as received from the blanking process. Thereby any costly, additional joint preparation is avoided, giving the hybrid welding technique an enhanced potential for use in the heavy automotive and mechanical industries.
Evaluation of Impact of Yarn Count and Stitch Length on Pilling, Abrasion, Shrinkage and Tightness Factor of 1 ? 1 Rib Cotton Knitted Fabrics
This study investigates the impact of yarn count and stitch length of 100% cotton knitted fabrics. 1 × 1 ribs structured fabrics were used in this research work. The stitch length 2.50 mm, 2.52 mm, 2.60 mm, 2.70 mm, 2.80 mm and 2.96 mm were used of the yarn count of 26Ne, 28Ne and 36Ne. The areal densities of the grey fabrics were in various amounts. The impacts of yarn count and stitch length were measured concerning pilling resistance, abrasion resistance, and shrinkage and tightness factor. The result showed that the fabric pilling grade decreased while number of cycle increased. Abrasion resistance decreased but length wise shrinkage increased despite the fact that the stitch length increased. The results also exposed that the tightness factor of the fabric increased with the increase of the stitch length in both dyeing and washing state and finished state compared to grey state for the yarn count 26Ne and homogeneous result not found for yarn count 28Ne and 36 Ne. Evaluation of Impact of Yarn Count and Stitch Length on Pilling, Abrasion, Shrinkage and Tightness Factor of 1 × 1 Rib Cotton Knitted Fabrics