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         The general characteristics of the production of honed pipes are that before cold deformation of the honed pipe materials and until the accumulated cold deformation reaches a certain level, in order to eliminate work hardening and other needs, a series of preparatory work must be carried out before continuing to cold deform the honed pipe products. There are many honing pipe processes; the honed pipe materials are from put into production to Processing into finished products usually requires multiple cold deformations. Moreover, the entire production process of honing pipes often includes multiple production cycles consisting of preparation processes and deformation processes. The cycle is repeated. The production cycle of honing pipes is long and the metal consumption of honing pipes is large. The honing pipe equipment is mostly arranged in a single unit, and the honing pipes are generally produced intermittently.
      The honing pipe material must be carefully inspected. There should be no harmful defects such as wrinkles, cracks, scars, scratches, etc. on the surface of the honing pipe. The size of the honing pipe should meet certain requirements, such as hot rolling. The outer diameter tolerance of the honing tube 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 of the honing tube should be straight and there should be no burrs; if there are burrs on the honing tube, they must be removed, which is especially important for cold-rolled tubes. In addition, the chemical composition and mechanical properties of the honing pipe material should comply with the provisions of the technical conditions.

High precision cold drawn tube Click to view product details

Honing tube Click to view product details

    Generally, the surface of the honing pipe material should be pickled first and then inspected. Minor defects in the honing tube can be repaired. To repair defects on the outer surface of the honing pipe, a peeling lathe, centerless grinder, portable or hanging grinder can be used.
    The grinding of inner surface defects of the honing tube can be carried out on grinding machines such as internal boring machines. Since surface defects will continue to expand during the cold deformation process of the honing tube, and as the diameter of the honing tube decreases during the production of the honing tube, it is more difficult to repair the inner surface defects. Therefore, the surface defects of the honing tube material should be eliminated as much as possible before cold processing.