| 摘要 |
A method of producing a warp beam, and the warp beam produced by this method are described. In order to detect in a welded metal warp beam (1) material and/or welding defects of the weld seams (9; 10) and of their beam flange-side immediate surrounding and in order to prevent a snapping off of the beam flanges (3; 4) due for instance to compressive forces created by the wound yarn, after the welding of the beam flange necks (5, 6) to the beam tube ends, the latter being reinforced internally, the weld seams (9; 10), their beam tube-side immediate surrounding as well as their beam flange-side immediate surrounding are lathed down approximately to final size; subsequently the warp beam (1) is tested by means of tensile forces oriented in the direction of the longitudinal axis of the beam tube, the total force being greater than the force necessary to reach the yield point of the metal in the beam tube wall portion (14) without internal reinforcement (15) in the final state and being less than the force necessary for reaching the yield point of the metal in the beam tube wall portion (13) which had been previously lathed down, in a state not yet relathed to final size. Finally the warp beam (1) is relathed in the cylindrical part so that the thickness (s2) of the beam tube wall portion (13) is greater than the thickness (s1) of the beam tube wall portion (14).
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