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Detailed introduction to the basic characteristics of honing pipe production
The basic characteristics of honing pipe production are: before cold deformation of the pipe material and after the accumulated cold deformation reaches a certain level, the finished product must undergo a series of preparations before continuing cold deformation to eliminate work hardening and other needs. There are many processes; the pipe material starts from It usually takes multiple cold deformations from being put into production to being processed into finished products. Moreover, the entire production process often includes multiple production cycles consisting of preparation processes and deformation processes. The cycles are repeated, the production cycle is long, and the metal consumption is large; the equipment is mostly arranged in a single unit, and is generally produced intermittently.
The pipe materials must be carefully inspected.Honing tubeThere should be no harmful defects on the surface such as wrinkles, cracks, scars, scratches, etc.; the dimensions should meet specific requirements, such as hot rolling. For quality pipes, the outer diameter tolerance is about ±1-1.5%, and the thickness tolerance is about one (10-15)%, + (10-12.5)%; the curvature is generally not greater than 1.5-2 mm/m; the end should be straight and without burrs; if there are burrs, they must be removed, which is especially important for cold-rolled pipes. In addition, the chemical composition and mechanical properties of the pipe materials should comply with the provisions of the technical conditions.
—Generally, the surface of the pipe material should be pickled first and then inspected. Minor defects can be repaired. For grinding defects on the outer surface, you can use a peeling lathe, centerless grinder, portable or hanging grinder. The grinding of inner surface defects can be carried out on grinding machines such as internal boring machines. Since surface defects will continue to expand during the cold deformation process, and as the pipe diameter decreases during production, it becomes more difficult to repair the inner surface defects of the honed pipe. Therefore, the surface defects of the pipe material should be eliminated as much as possible before cold processing.