| 摘要 |
<p>Components being joined (e.g. formed sheet metal edges) and the seam along the joint line are constructed and/or arranged, such that a free space (21) is formed in the region below the root (20) of the seam. In relation to the direction of joining, a flow of gas (15) impinges onto the melt (17) front (16). The gas is a protective- or working gas. The arrangement is such that the gas flow is caused to divide into an upper stream (19) over a surface (18) of the seam, and a lower stream (22) along the root (20) of the seam. The gas flow is directed in a vertical (z) direction through a plane containing the joint line and the direction of advance (x). It makes an angle with the plane of between -10[deg] and +30[deg], preferably at 0[deg]. It is directed against the joint line in the melt region and inclined onto the melt front. Variations of the angular relationship are detailed. Gas nozzle spacing from the melt front is predetermined as a function of the velocity, being preferably 15 mm. The components being joined and the seam along the joint line, are constructed and arranged such that during operation an essentially closed root channel is formed below the seam. The gas preferably impinges on the melt front at a velocity of 5 m/s. The advance velocity of the energy source (5) and gas nozzle lies between 0.5 and 20 m/minute. An edge-formed seam is produced. The process employs a beam and the protective- or working gas is an inert gas. A filler material may be supplied. The energy source generates a laser-, electron-, or plasma beam which is preferably directed through a right angle to impact on the joint. An independent claim IS INCLUDED FOR corresponding equipment.</p> |
